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filename=BearHttpsClient.c content-type: application/octet-stream content-length: 1863133 /* MIT License Copyright (c) 2025 OUI Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "BearHttpsClient.h" #ifndef LuaSilverChain_fdefine #define LuaSilverChain_fdefine //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end bool private_BearHttps_is_sanitize_key(const char *key,const char *sanitized,int sanitized_size){ long key_size = private_BearsslHttps_strlen(key); int comparation_size = 0; for(int i=0; i < key_size;i++){ char current = key[i]; if(current == ' ' || current == '\t' || current == '\n' || current == '\r'|| current == '-'|| current == '_'){ continue; } if(comparation_size > sanitized_size){ return false; } char current_lower = private_BearsslHttps_parse_char_to_lower(current); char sanitized_lower = private_BearsslHttps_parse_char_to_lower(sanitized[comparation_size]); if(current_lower != sanitized_lower){ return false; } comparation_size++; } if(comparation_size != sanitized_size){ return false; } return true; } char * private_BearHttps_format_vaarg(const char *expresion, va_list args){ va_list args_copy; va_copy(args_copy, args); long required_size = vsnprintf(NULL, 0,expresion,args_copy); va_end(args_copy); char *buffer = (char*)malloc(sizeof(char) * required_size + 2); vsnprintf(buffer,sizeof (char) * required_size+1,expresion,args); return buffer; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end private_BearHttpsHeaders *private_newBearHttpsHeaders(){ private_BearHttpsHeaders *self = (private_BearHttpsHeaders *)BearsslHttps_allocate(sizeof(private_BearHttpsHeaders)); *self = (private_BearHttpsHeaders){0}; self->keyvals = (private_BearHttpsKeyVal **)BearsslHttps_allocate(0); return self; } void private_BearHttpsHeaders_add_keyval(private_BearHttpsHeaders *self, private_BearHttpsKeyVal *keyval){ self->keyvals = (private_BearHttpsKeyVal **)BearsslHttps_reallocate( self->keyvals, sizeof(private_BearHttpsKeyVal*) * (self->size + 1) ); self->keyvals[self->size] = keyval; self->size++; } void private_BearHttpsHeaders_free(private_BearHttpsHeaders *self){ for(int i = 0; i < self->size; i++){ private_BearHttpsKeyVal_free(self->keyvals[i]); } free(self->keyvals); free(self); } private_BearHttpsKeyVal * private_BearHttpsHeaders_get_key_val_by_index(private_BearHttpsHeaders *self,int index){ if(self->size <= index){ return NULL; } return self->keyvals[index]; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end private_BearHttpsKeyVal *private_newBearHttpsKeyVal(){ private_BearHttpsKeyVal *self = (private_BearHttpsKeyVal *)BearsslHttps_allocate(sizeof(private_BearHttpsKeyVal)); *self = (private_BearHttpsKeyVal){0}; self->key = NULL; self->value = NULL; self->key_owner =false; self->value_owner = false; return self; } void private_BearHttpsKeyVal_set_key(private_BearHttpsKeyVal *self, char *key,short key_onwership_mode){ private_BearsslHttps_free_considering_ownership((void **)&self->key,&self->key_owner); private_BearsslHttps_set_str_considering_ownership(&self->key,key,&self->key_owner, key_onwership_mode); } void private_BearHttpsKeyVal_set_value(private_BearHttpsKeyVal *self, char *value,short value_onwership_mode){ private_BearsslHttps_free_considering_ownership((void **)&self->value,&self->value_owner); private_BearsslHttps_set_str_considering_ownership(&self->value,value,&self->value_owner,value_onwership_mode); } void private_BearHttpsKeyVal_free(private_BearHttpsKeyVal *self){ private_BearsslHttps_free_considering_ownership((void **)&self->key,&self->key_owner); private_BearsslHttps_free_considering_ownership((void **)&self->value,&self->value_owner); free(self); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsNamespace newBearHttpsNamespace(){ BearHttpsNamespace self = {0}; self.REFERENCE = BEARSSL_HTTPS_REFERENCE; self.GET_OWNERSHIP = BEARSSL_HTTPS_GET_OWNERSHIP; self.COPY = BEARSSL_HTTPS_COPY; self.response = newBearHttpsResponseNamespace(); self.request= newBearHttpsRequestNamespace(); return self; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsRequestNamespace newBearHttpsRequestNamespace(){ BearHttpsRequestNamespace self = {0}; self.send_any_with_ownership_control = BearHttpsRequest_send_any_with_ownership_control; self.send_any = BearHttpsRequest_send_any; self.send_body_str_with_ownership_control = BearHttpsRequest_send_body_str_with_ownership_control; self.send_body_str = BearHttpsRequest_send_body_str; self.send_file_with_ownership_control = BearHttpsRequest_send_file_with_ownership_control; self.send_file = BearHttpsRequest_send_file; self.send_file_auto_detect_content_type = BearHttpsRequest_send_file_auto_detect_content_type; self.fetch = BearHttpsRequest_fetch; #ifndef BEARSSL_HTTPS_MOCK_CJSON self.send_cJSON_with_ownership_control = BearHttpsRequest_send_cJSON_with_ownership_control; self.send_cJSON = BearHttpsRequest_send_cJSON; self.create_cJSONPayloadObject = BearHttpsRequest_create_cJSONPayloadObject; self.create_cJSONPayloadArray = BearHttpsRequest_create_cJSONPayloadArray; #endif self.newBearHttpsRequest_with_url_ownership_config = newBearHttpsRequest_with_url_ownership_config; self.newBearHttpsRequest =newBearHttpsRequest; self.newBearHttpsRequest_fmt = newBearHttpsRequest_fmt; self.set_url_with_ownership_config = BearHttpsRequest_set_url_with_ownership_config; self.set_url = BearHttpsRequest_set_url; self.set_known_ips = BearHttpsRequest_set_known_ips; self.add_header_with_ownership_config = BearHttpsRequest_add_header_with_ownership_config; self.add_header = BearHttpsRequest_add_header; self.set_method = BearHttpsRequest_set_method; self.set_max_redirections = BearHttpsRequest_set_max_redirections; self.set_dns_providers = BearHttpsRequest_set_dns_providers; self.set_chunk_header_read_props = BearHttpsRequest_set_chunk_header_read_props; self.set_trusted_anchors = BearHttpsRequest_set_trusted_anchors; self.represent = BearHttpsRequest_represent; self.free = BearHttpsRequest_free; return self; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsResponseNamespace newBearHttpsResponseNamespace(){ BearHttpsResponseNamespace self = {0}; self.read_body_chunck = BearHttpsResponse_read_body_chunck; self.read_body = BearHttpsResponse_read_body; self.read_body_str = BearHttpsResponse_read_body_str; self.get_status_code = BearHttpsResponse_get_status_code; self.get_body_size = BearHttpsResponse_get_body_size; self.get_headers_size = BearHttpsResponse_get_headers_size; self.get_header_value_by_index = BearHttpsResponse_get_header_value_by_index; self.get_header_value_by_key = BearHttpsResponse_get_header_value_by_key; self.get_header_key_by_index = BearHttpsResponse_get_header_key_by_index; self.get_header_value_by_sanitized_key = BearHttpsResponse_get_header_value_by_sanitized_key; self.set_max_body_size = BearHttpsResponse_set_max_body_size; self.set_body_read_props = BearHttpsResponse_set_body_read_props; self.error = BearHttpsResponse_error; self.get_error_msg = BearHttpsResponse_get_error_msg; self.get_error_code = BearHttpsResponse_get_error_code; self.free = BearHttpsResponse_free; #ifndef BEARSSL_HTTPS_MOCK_CJSON self.read_body_json = BearHttpsResponse_read_body_json; #endif return self; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end static int private_BearHttpsRequest_connect_ipv4(BearHttpsResponse *self, const char *ipv4_ip, int port) { int sockfd = Universal_socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { BearHttpsResponse_set_error(self,"ERROR: failed to create socket",BEARSSL_HTTPS_FAILT_TO_CREATE_SOCKET); return -1; } Universal_sockaddr_in server_addr; memset(&server_addr, 0, sizeof(server_addr)); server_addr.sin_family = UNI_AF_INET; server_addr.sin_port = Universal_htons(port); if (Universal_inet_pton(UNI_AF_INET, ipv4_ip, &server_addr.sin_addr) <= 0) { BearHttpsResponse_set_error(self,"ERROR: invalid address",BEARSSL_HTTPS_INVALID_IPV4); Universal_close(sockfd); return -1; } if (Universal_connect(sockfd, (Universal_sockaddr *)&server_addr, sizeof(server_addr)) < 0) { BearHttpsResponse_set_error(self,"ERROR: failed to connect",BEARSSL_HTTPS_FAILT_TO_CONNECT); Universal_close(sockfd); return -1; } return sockfd; } static int private_BearHttpsRequest_connect_ipv4_no_error_raise( const char *ipv4_ip, int port) { int sockfd = Universal_socket(UNI_AF_INET, UNI_SOCK_STREAM, 0); if (sockfd < 0) { return -1; } Universal_sockaddr_in server_addr; memset(&server_addr, 0, sizeof(server_addr)); server_addr.sin_family = UNI_AF_INET; server_addr.sin_port = Universal_htons(port); if (Universal_inet_pton(UNI_AF_INET, ipv4_ip, &server_addr.sin_addr) <= 0) { Universal_close(sockfd); return -1; } if (Universal_connect(sockfd, (Universal_sockaddr *)&server_addr, sizeof(server_addr)) < 0) { Universal_close(sockfd); return -1; } return sockfd; } #if defined(BEARSSL_USSE_GET_ADDRINFO) || defined(BEARSSL_HTTPS_MOCK_CJSON) static int private_BearHttps_connect_host(BearHttpsRequest *self, BearHttpsResponse *response, const char *host, int port){ Universal_addrinfo hints = {0}; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = UNI_SOCK_STREAM; char port_str[10]; snprintf(port_str,sizeof(port_str)-1, "%d", port); Universal_addrinfo *addr_info; int status = Universal_getaddrinfo(host, port_str, &hints, &addr_info); if (status != 0) { BearHttpsResponse_set_error(response, gai_strerror(status),BEARSSL_HTTPS_UNKNOW_ERROR); return -1; } int found_socket = -1; for (Universal_addrinfo *current_addr = addr_info; current_addr != NULL; current_addr = current_addr->ai_next) { found_socket = Universal_socket(current_addr->ai_family, current_addr->ai_socktype, current_addr->ai_protocol); if (found_socket < 0) { continue; } if (Universal_connect(found_socket, current_addr->ai_addr, current_addr->ai_addrlen) < 0) { Universal_close(found_socket); continue; } break; } if (found_socket < 0) { BearHttpsResponse_set_error(response, "ERROR: failed to connect\n",BEARSSL_HTTPS_FAILT_TO_CONNECT); return -1;; } Universal_freeaddrinfo(addr_info); return found_socket; } #else static int private_BearHttps_connect_host(BearHttpsRequest *self, BearHttpsResponse *response, const char *host, int port){ for(int i = 0; i < self->known_ips_size;i++){ const char *ip = self->known_ips[i]; int sockfd = private_BearHttpsRequest_connect_ipv4_no_error_raise(ip,port); if(sockfd < 0){ continue; } return sockfd; } for(int i = 0; i < BEARSSL_DNS_CACHE_SIZE;i++){ privateBearHttpsDnsCache *cache = &privateBearHttpsDnsCache_itens[i]; if(private_BearsslHttp_strcmp(cache->host,host) == 0){ int sockfd = private_BearHttpsRequest_connect_ipv4_no_error_raise(cache->ip,port); if(sockfd < 0){ break; } return sockfd; } } BearHttpsClientDnsProvider *chosen_dns_providers = self->dns_providers ? self->dns_providers : privateBearHttpsProviders; int chosen_dns_providers_size = self->total_dns_providers ? self->total_dns_providers : privateBearHttpsProvidersSize; if(chosen_dns_providers_size == 0){ BearHttpsResponse_set_error(response,"ERROR: no dns providers\n",BEARSSL_HTTPS_NO_DNS_PROVIDED); return -1; } for(int i = 0; i < chosen_dns_providers_size;i++){ BearHttpsClientDnsProvider provider = chosen_dns_providers[i]; BearHttpsRequest *dns_request = newBearHttpsRequest_fmt("https://%s:%d%s?name=%s&type=A",provider.ip,provider.port, provider.route, host); //printf("used url %s\n",dns_request->url); dns_request->custom_bear_dns = provider.hostname; //these its require, otherwise can generate indirect recursion error if provider.ip its wrong dns_request->must_be_ipv4 = true; BearHttpsResponse *dns_response = BearHttpsRequest_fetch(dns_request); if(BearHttpsResponse_error(dns_response)){ BearHttpsRequest_free(dns_request); BearHttpsResponse_free(dns_response); continue; } cJSON * body = BearHttpsResponse_read_body_json(dns_response); if(BearHttpsResponse_error(dns_response)){ BearHttpsRequest_free(dns_request); BearHttpsResponse_free(dns_response); continue; } cJSON * answer = cJSON_GetObjectItem(body, "Answer"); if(answer == NULL){ BearHttpsRequest_free(dns_request); BearHttpsResponse_free(dns_response); continue; } long size = cJSON_GetArraySize(answer); if(size == 0){ BearHttpsRequest_free(dns_request); BearHttpsResponse_free(dns_response); continue; } for(int j = 0; j < size;j++){ cJSON * item = cJSON_GetArrayItem(answer,j); cJSON * data = cJSON_GetObjectItem(item, "data"); if(data == NULL){ continue; } const char * ipv4 = cJSON_GetStringValue(data); if(ipv4 == NULL){ continue; } int sockfd = private_BearHttpsRequest_connect_ipv4_no_error_raise(ipv4,port); if(sockfd < 0){ continue; } long host_size = private_BearsslHttps_strlen(host); long ip_size = private_BearsslHttps_strlen(ipv4); if(privateBearHttpsDnsCache_last_free_point >= BEARSSL_DNS_CACHE_SIZE){ privateBearHttpsDnsCache_last_free_point = 0; } if(host_size < BEARSSL_DNS_CACHE_HOST_SIZE && ip_size < BEARSSL_DNS_CACHE_IP_SIZE){ privateBearHttpsDnsCache* cache = &privateBearHttpsDnsCache_itens[privateBearHttpsDnsCache_last_free_point]; private_BearsslHttps_strcpy( cache->host,host); private_BearsslHttps_strcpy( cache->ip,ipv4); privateBearHttpsDnsCache_last_free_point++; } BearHttpsRequest_free(dns_request); BearHttpsResponse_free(dns_response); return sockfd; } } BearHttpsResponse_set_error(response,"ERROR: failed to create dns request",BEARSSL_HTTPS_FAILT_TO_CREATE_DNS_REQUEST); return -1; } #endif static int private_BearHttps_sock_read(void *ctx, unsigned char *buf, size_t len) { for (;;) { ssize_t read_len; read_len = Universal_recv(*(int*)ctx, buf, len,0); if (read_len <= 0) { if (read_len < 0 && errno == EINTR) { continue; } return -1; } return (int)read_len; } } static int private_BearHttps_sock_write(void *ctx, const unsigned char *buf, size_t len) { for (;;) { ssize_t write_len; write_len = Universal_send(*(int *)ctx, buf, len,0); if (write_len <= 0) { if (write_len < 0 && errno == EINTR) { continue; } return -1; } return (int)write_len; } } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end void private_BearsslHttps_free_considering_ownership(void **value,bool *owner){ if(*owner){ BearsslHttps_free(*value); } *owner = false; *value = NULL; } void private_BearsslHttps_set_str_considering_ownership( char **dest, char *value, bool *owner, short ownership_mode ){ private_BearsslHttps_free_considering_ownership((void**)dest,owner); if(ownership_mode == BEARSSL_HTTPS_COPY){ *dest = private_BearsslHttps_strdup(value); *owner = true; } if(ownership_mode == BEARSSL_HTTPS_GET_OWNERSHIP){ *dest = value; *owner = true; } if(ownership_mode == BEARSSL_HTTPS_REFERENCE){ *dest = value; *owner = false; } } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end void private_BearHttpsRequest_free_body(BearHttpsRequest *self){ if(self->body_type == PRIVATE_BEARSSL_BODY_RAW){ private_BearsslHttps_free_considering_ownership( (void**)&self->body_raw.value,&self->body_raw.onwer); } if(self->body_type == PRIVATE_BEARSSL_BODY_FILE){ private_BearsslHttps_free_considering_ownership( (void**)&self->body_file.path, &self->body_file.onwer ); } #ifndef BEARSSL_HTTPS_MOCK_CJSON if(self->body_type == PRIVATE_BEARSSL_BODY_JSON){ if(self->body_json.onwer){ cJSON_Delete(self->body_json.json); } } #endif self->body_type = PRIVATE_BEARSSL_NO_BODY; } void BearHttpsRequest_send_any_with_ownership_control(BearHttpsRequest *self,unsigned char *content, long size,short ownership_mode){ private_BearHttpsRequest_free_body(self); self->body_type = PRIVATE_BEARSSL_BODY_RAW; if(ownership_mode == BEARSSL_HTTPS_COPY){ self->body_raw.value = (unsigned char *)malloc(size+2); for(int i = 0; i < size; i++){ self->body_raw.value[i] = content[i]; } self->body_raw.value[size] = '\0'; self->body_raw.onwer = true; self->body_raw.size = size; } if(ownership_mode == BEARSSL_HTTPS_GET_OWNERSHIP){ self->body_raw.value = content; self->body_raw.onwer = true; self->body_raw.size = size; } if(ownership_mode == BEARSSL_HTTPS_REFERENCE){ self->body_raw.value = content; self->body_raw.onwer = false; self->body_raw.size = size; } } void BearHttpsRequest_send_any(BearHttpsRequest *self,unsigned char *content, long size){ BearHttpsRequest_send_any_with_ownership_control(self,content,size,BEARSSL_DEFAULT_STRATEGY); } void BearHttpsRequest_send_body_str_with_ownership_control(BearHttpsRequest *self, char *content,short ownership_mode){ BearHttpsRequest_send_any_with_ownership_control(self,(unsigned char *)content,private_BearsslHttps_strlen(content),ownership_mode); } void BearHttpsRequest_send_body_str(BearHttpsRequest *self, char *content){ BearHttpsRequest_send_any_with_ownership_control(self,(unsigned char *)content,private_BearsslHttps_strlen(content),BEARSSL_DEFAULT_STRATEGY); } void BearHttpsRequest_send_file_with_ownership_control(BearHttpsRequest *self, char *path,short ownership_mode,const char *content_type){ private_BearHttpsRequest_free_body(self); private_BearsslHttps_set_str_considering_ownership( &self->body_file.path, path, &self->body_file.onwer, ownership_mode); private_BearsslHttps_strcpy(self->body_file.content_type,content_type); self->body_type = PRIVATE_BEARSSL_BODY_FILE; } void BearHttpsRequest_send_file(BearHttpsRequest *self,const char *path,const char *content_type){ BearHttpsRequest_send_file_with_ownership_control(self,(char*)path,BEARSSL_DEFAULT_STRATEGY,content_type); } void BearHttpsRequest_send_file_auto_detect_content_type(BearHttpsRequest *self,const char *path){ char extension[100] = {0}; bool found = false; long path_size = private_BearsslHttps_strlen(path); //iterate in negative from path, to count the extension for(int i = path_size-1; i >= 0; i--){ if(path[i] == '.'){ //verify if the extension is bigger than 100 if(path_size - i > 100){ break; } found = true; private_BearsslHttps_strcpy(extension,&path[i+1]); break; } } if(!found){ BearHttpsRequest_send_file(self,path,"application/octet-stream"); return; } const char *content_type = "application/octet-stream"; if(private_BearsslHttp_strcmp(extension,"txt") == 0){ content_type = "text/plain"; } else if(private_BearsslHttp_strcmp(extension,"png") == 0){ content_type = "image/png"; } else if(private_BearsslHttp_strcmp(extension,"jpg") == 0){ content_type = "image/jpg"; } else if(private_BearsslHttp_strcmp(extension,"jpeg") == 0){ content_type = "image/jpeg"; } else if(private_BearsslHttp_strcmp(extension,"gif") == 0){ content_type = "image/gif"; } else if(private_BearsslHttp_strcmp(extension,"pdf") == 0){ content_type = "application/pdf"; } else if(private_BearsslHttp_strcmp(extension,"html") == 0){ content_type = "text/html"; } else if(private_BearsslHttp_strcmp(extension,"css") == 0){ content_type = "text/css"; } else if(private_BearsslHttp_strcmp(extension,"js") == 0){ content_type = "application/javascript"; } else if(private_BearsslHttp_strcmp(extension,"json") == 0){ content_type = "application/json"; } else if(private_BearsslHttp_strcmp(extension,"xml") == 0){ content_type = "application/xml"; } BearHttpsRequest_send_file(self,path,content_type); } #ifndef BEARSSL_HTTPS_MOCK_CJSON void BearHttpsRequest_send_cJSON_with_ownership_control(BearHttpsRequest *self,cJSON *json,short ownership_mode){ private_BearHttpsRequest_free_body(self); self->body_type = PRIVATE_BEARSSL_BODY_JSON; if(ownership_mode == BEARSSL_HTTPS_COPY){ self->body_json.json = cJSON_Duplicate(json,true); self->body_json.onwer = true; } if(ownership_mode == BEARSSL_HTTPS_GET_OWNERSHIP){ self->body_json.json = json; self->body_json.onwer = true; } if(ownership_mode == BEARSSL_HTTPS_REFERENCE){ self->body_json.json = json; self->body_json.onwer = false; } } void BearHttpsRequest_send_cJSON(BearHttpsRequest *self,cJSON *json){ BearHttpsRequest_send_cJSON_with_ownership_control(self,json,BEARSSL_DEFAULT_STRATEGY); } cJSON * BearHttpsRequest_create_cJSONPayloadObject(BearHttpsRequest *self){ cJSON *json = cJSON_CreateObject(); BearHttpsRequest_send_cJSON_with_ownership_control(self,json,BEARSSL_HTTPS_GET_OWNERSHIP); return json; } cJSON * BearHttpsRequest_create_cJSONPayloadArray(BearHttpsRequest *self){ cJSON *json = cJSON_CreateArray(); BearHttpsRequest_send_cJSON_with_ownership_control(self,json,BEARSSL_HTTPS_GET_OWNERSHIP); return json; } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsResponse * BearHttpsRequest_fetch(BearHttpsRequest *self){ BearHttpsResponse *response = NULL; int uni_start = Universal_start_all(); if (uni_start != 0) { BearHttpsResponse_set_error(response, "failt to start unisocket",BEARSSL_HTTPS_FAILT_TO_START_UNISOCKET); return response; } //we start at -1 , because the first conection its not consider a redirection for(int i = -1; i < self->max_redirections;i++){ response = private_newBearHttpsResponse(); private_BearHttpsRequisitionProps *requisition_props = private_new_private_BearHttpsRequisitionProps( self->url, self->port ); if(requisition_props == NULL){ BearHttpsResponse_set_error(response, "invalid url",BEARSSL_HTTPS_INVALID_URL); return response; } if(requisition_props->is_ipv4){ response->connection_file_descriptor = private_BearHttpsRequest_connect_ipv4( response, requisition_props->hostname, requisition_props->port ); } //these function its used on the private_BearHttpsRequest_connect_host and if returns these //means that the dns its wrong formatted if(requisition_props->is_ipv4 == false && self->must_be_ipv4){ BearHttpsResponse_set_error(response, "must be ipv4",BEARSSL_HTTPS_MUST_BE_IPV4); private_BearHttpsRequisitionProps_free(requisition_props); return response; } if(requisition_props->is_ipv4 == false){ response->connection_file_descriptor =private_BearHttps_connect_host( self, response, requisition_props->hostname, requisition_props->port ); } if(response->connection_file_descriptor < 0){ private_BearHttpsRequisitionProps_free(requisition_props); return response; } if(requisition_props->is_https){ const char *chosen_host = self->custom_bear_dns ? self->custom_bear_dns : requisition_props->hostname; private_BearHttpsResponse_start_bearssl_props(response,chosen_host,self->trust_anchors,self->trusted_anchors_size); } private_BearHttpsResponse_write(response, (unsigned char*)self->method, private_BearsslHttps_strlen(self->method)); private_BearHttpsResponse_write(response, (unsigned char*)" ", 1); private_BearHttpsResponse_write(response, (unsigned char*)requisition_props->route, private_BearsslHttps_strlen(requisition_props->route)); private_BearHttpsResponse_write(response, (unsigned char*)" HTTP/1.0\r\nHost: ", private_BearsslHttps_strlen(" HTTP/1.0\r\nHost: ")); private_BearHttpsResponse_write(response, (unsigned char*)requisition_props->hostname, private_BearsslHttps_strlen(requisition_props->hostname)); private_BearHttpsResponse_write(response, (unsigned char*)"\r\n", 2); for (int i = 0; i < self->headers->size; i++) { private_BearHttpsKeyVal *keyval = self->headers->keyvals[i]; private_BearHttpsResponse_write(response, (unsigned char*)keyval->key, private_BearsslHttps_strlen(keyval->key)); private_BearHttpsResponse_write(response, (unsigned char*)": ", 2); private_BearHttpsResponse_write(response, (unsigned char*)keyval->value, private_BearsslHttps_strlen(keyval->value)); private_BearHttpsResponse_write(response, (unsigned char*)"\r\n", 2); } if(self->body_type ==PRIVATE_BEARSSL_BODY_RAW){ char content_length[100]; snprintf(content_length,sizeof(content_length)-1,"Content-Length: %ld\r\n\r\n",self->body_raw.size); private_BearHttpsResponse_write(response,(unsigned char*)content_length,strlen(content_length)); private_BearHttpsResponse_write(response,self->body_raw.value,self->body_raw.size); } if(BearHttpsResponse_error(response)){ private_BearHttpsRequisitionProps_free(requisition_props); return response; } if(self->body_type == PRIVATE_BEARSSL_BODY_FILE){ FILE *file = fopen(self->body_file.path,"rb"); if(file == NULL){ BearHttpsResponse_set_error(response, "impssible to open file",BEARSSL_HTTPS_IMPOSSIBLE_TO_OPEN_FILE); private_BearHttpsRequisitionProps_free(requisition_props); return response; } char content_type[200]; snprintf(content_type,sizeof(content_type)-1, "Content-Type: %s\r\n",self->body_file.content_type); private_BearHttpsResponse_write(response,(unsigned char*)content_type,strlen(content_type)); fseek(file, 0, SEEK_END); long size = ftell(file); fseek(file, 0, SEEK_SET); char content_length[100]; sprintf(content_length,"Content-Length: %ld\r\n\r\n",size); private_BearHttpsResponse_write(response,(unsigned char*)content_length,strlen(content_length)); unsigned char send_buff[BEARSSL_BODY_CHUNK_SIZE]; while (1) { size_t read_size = fread(send_buff, 1, BEARSSL_BODY_CHUNK_SIZE, file); if (read_size == 0) { break; } private_BearHttpsResponse_write(response, send_buff, read_size); } fclose(file); } #ifndef BEARSSL_HTTPS_MOCK_CJSON if(self->body_type == PRIVATE_BEARSSL_BODY_JSON){ const char *content_type = "Content-Type: application/json\r\n"; private_BearHttpsResponse_write(response,(unsigned char*)content_type,strlen(content_type)); char * dumped = cJSON_Print(self->body_json.json); long dumped_size = private_BearsslHttps_strlen(dumped); char content_length[100]; sprintf(content_length,"Content-Length: %ld\r\n\r\n",dumped_size); private_BearHttpsResponse_write(response,(unsigned char*)content_length,strlen(content_length)); private_BearHttpsResponse_write(response,(unsigned char*)dumped,dumped_size); BearsslHttps_free(dumped); } #endif if(self->body_type == PRIVATE_BEARSSL_NO_BODY){ private_BearHttpsResponse_write(response, (unsigned char*)"\r\n", 2); } if(requisition_props->is_https){ if(br_sslio_flush(&response->ssl_io)){ BearHttpsResponse_set_error(response, "error flushing",BEARSSL_HTTPS_ERROR_FLUSHING); private_BearHttpsRequisitionProps_free(requisition_props); return response; } } private_BearHttpsResponse_read_til_end_of_headers_or_reach_limit(response,self->header_chunk_read_size,self->header_chunk_reallocator_factor); if(BearHttpsResponse_error(response)){ private_BearHttpsRequisitionProps_free(requisition_props); return response; } private_BearHttpsRequisitionProps_free(requisition_props); const int REDIRECT_CODE = 300; const int REDIRECT_CODE2 = 301; if((response->status_code == REDIRECT_CODE || response->status_code == REDIRECT_CODE2) && i < self->max_redirections -1){ char *location = BearHttpsResponse_get_header_value_by_sanitized_key(response,"location"); if(location == NULL){ return response; } BearHttpsRequest_set_url_with_ownership_config(self,location,BEARSSL_HTTPS_COPY ); BearHttpsResponse_free(response); response = NULL; continue; } // ends the loop and returns the last response break; } return response; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsRequest * newBearHttpsRequest_with_url_ownership_config(char *url,short url_ownership_mode){ BearHttpsRequest *self = (BearHttpsRequest *)malloc(sizeof(BearHttpsRequest)); *self = (BearHttpsRequest){0}; self->max_redirections = BEARSSL_MAX_REDIRECTIONS; BearHttpsRequest_set_url_with_ownership_config(self,url,url_ownership_mode); self->headers = private_newBearHttpsHeaders(); self->body_type =PRIVATE_BEARSSL_NO_BODY; self->header_chunk_read_size = BEARSSL_HEADER_CHUNK; self->header_chunk_reallocator_factor = BEARSSL_HEADER_REALLOC_FACTOR; private_BearsslHttps_strcpy(self->method,"GET"); return self; } BearHttpsRequest * newBearHttpsRequest(const char *url){ return newBearHttpsRequest_with_url_ownership_config((char*)url,BEARSSL_DEFAULT_STRATEGY); } BearHttpsRequest * newBearHttpsRequest_fmt(const char *url,...){ va_list args; va_start(args,url); char *formmated = private_BearHttps_format_vaarg(url,args); va_end(args); if(formmated == NULL){ return NULL; } return newBearHttpsRequest_with_url_ownership_config(formmated,BEARSSL_HTTPS_GET_OWNERSHIP); } void BearHttpsRequest_set_url_with_ownership_config(BearHttpsRequest *self , char *url,short url_ownership_mode){ private_BearsslHttps_set_str_considering_ownership(&self->url,url,&self->route_owner,url_ownership_mode); } void BearHttpsRequest_set_url(BearHttpsRequest *self ,const char *url){ BearHttpsRequest_set_url_with_ownership_config(self,(char*)url,BEARSSL_DEFAULT_STRATEGY); } void BearHttpsRequest_add_header_with_ownership_config(BearHttpsRequest *self ,char *key,short key_ownership_mode,char *value,short value_owner){ //verify if the key already exists for(int i = 0; i < self->headers->size;i++){ private_BearHttpsKeyVal *key_val = self->headers->keyvals[i]; if(private_BearsslHttp_strcmp(key_val->key,key) == 0){ private_BearHttpsKeyVal_set_value(key_val,value,value_owner); return; } } private_BearHttpsKeyVal * key_obj = private_newBearHttpsKeyVal(); private_BearHttpsKeyVal_set_key(key_obj,key,key_ownership_mode); private_BearHttpsKeyVal_set_value(key_obj,value,value_owner); private_BearHttpsHeaders_add_keyval(self->headers,key_obj); } void BearHttpsRequest_add_header(BearHttpsRequest *self ,char *key,char *value){ BearHttpsRequest_add_header_with_ownership_config(self,key,BEARSSL_DEFAULT_STRATEGY,value,BEARSSL_DEFAULT_STRATEGY); } void BearHttpsRequest_add_header_fmt(BearHttpsRequest *self ,char *key,char *format,...){ va_list args; va_start(args,format); char *formmated = private_BearHttps_format_vaarg(format,args); va_end(args); if(formmated == NULL){ return; } BearHttpsRequest_add_header_with_ownership_config(self,key,BEARSSL_DEFAULT_STRATEGY,formmated,BEARSSL_HTTPS_GET_OWNERSHIP); } void BearHttpsRequest_set_method(BearHttpsRequest *self ,const char *method){ private_BearsslHttps_strcpy(self->method,method); } void BearHttpsRequest_set_known_ips(BearHttpsRequest *self , const char *known_ips[],int known_ips_size){ self->known_ips = known_ips; self->known_ips_size = known_ips_size; } void BearHttpsRequest_represent(BearHttpsRequest *self){ printf("Route: %s\n",self->url); printf("Method: %s\n",self->method); printf("Headers:\n"); for(int i = 0; i < self->headers->size;i++){ private_BearHttpsKeyVal *key_val = self->headers->keyvals[i]; printf("\t%s: %s\n",key_val->key,key_val->value); } if(self->body_type == PRIVATE_BEARSSL_BODY_RAW){ printf("Body: %s\n",self->body_raw.value); } if(self->body_type == PRIVATE_BEARSSL_BODY_FILE){ printf("Body-File: %s\n",self->body_file.path); } } void BearHttpsRequest_set_max_redirections(BearHttpsRequest *self ,int max_redirections){ self->max_redirections = max_redirections; } void BearHttpsRequest_set_dns_providers(BearHttpsRequest *self ,BearHttpsClientDnsProvider *dns_providers,int total_dns_proviers){ self->dns_providers= dns_providers; self->total_dns_providers = total_dns_proviers; } void BearHttpsRequest_set_chunk_header_read_props(BearHttpsRequest *self ,int chunk_size,int max_chunk_size){ self->header_chunk_read_size = chunk_size; self->header_chunk_reallocator_factor = max_chunk_size; } void BearHttpsRequest_set_trusted_anchors(BearHttpsRequest *self ,br_x509_trust_anchor *trust_anchors, size_t trusted_anchors_size){ self->trust_anchors = trust_anchors; self->trusted_anchors_size = trusted_anchors_size; } void BearHttpsRequest_free(BearHttpsRequest *self){ private_BearHttpsRequest_free_body(self); private_BearHttpsHeaders_free(self->headers); private_BearsslHttps_free_considering_ownership((void **)&self->url,&self->route_owner); free(self); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end private_BearHttpsRequisitionProps * private_new_private_BearHttpsRequisitionProps(const char *url,int default_port){ int url_size = private_BearsslHttps_strlen(url); const short HTTP_START_SIZE = sizeof("https://")-1; const short HTTPS_START_SIZE = sizeof("https://")-1; private_BearHttpsRequisitionProps *self = (private_BearHttpsRequisitionProps *)malloc(sizeof(private_BearHttpsRequisitionProps)); *self = (private_BearHttpsRequisitionProps){0}; short start_size; //setuping defaults elements if(private_BearsslHttps_startswith(url,"https://")){ self->port = default_port ? default_port: 80; self->is_https = false; start_size = HTTP_START_SIZE; } else if(private_BearsslHttps_startswith(url,"https://")){ self->port = default_port ? default_port: 443; self->is_https = true; start_size = HTTPS_START_SIZE; } else{ self->port = default_port ? default_port: 80; self->is_https = false; start_size = 0; } //1000 //2000 int end_host_name_and_start_of_route = private_BearsslHttps_indexof_from_point(url,'/',start_size); if(end_host_name_and_start_of_route == -1){ end_host_name_and_start_of_route = url_size; } self->hostname = private_BearsslHttps_strndup((url+start_size),end_host_name_and_start_of_route-start_size); long host_name_size = private_BearsslHttps_strlen(self->hostname); if(end_host_name_and_start_of_route == url_size){ self->route = private_BearsslHttps_strdup("/"); } else{ self->route = private_BearsslHttps_strndup((url+end_host_name_and_start_of_route),url_size-end_host_name_and_start_of_route+1); } //iterate over hostname to determine if its ipv4 short total_dots = 0; bool only_numbers = true; for(int i = 0; i < host_name_size; i++){ if(self->hostname[i] == '.'){ total_dots++; continue; } if(self->hostname[i] == ':'){ break; } if(self->hostname[i] < '0' || self->hostname[i] > '9'){ only_numbers = false; break; } } if(total_dots == 3 && only_numbers){ self->is_ipv4 = true; } //detect if self.hostname its ipv4 if(default_port == 0){ int start_port = private_BearsslHttps_indexof_from_point(self->hostname,':',0); if(start_port != -1){ self->hostname[start_port] = '\0'; self->port = atoi(self->hostname+start_port+1); } } return self; } void private_BearHttpsRequisitionProps_free(private_BearHttpsRequisitionProps *self){ BearsslHttps_free(self->hostname); BearsslHttps_free(self->route); BearsslHttps_free(self); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end void private_BearHttpsResponse_parse_headers(BearHttpsResponse *self,int headers_end){ const short WAITING_FIRST_SPACE = 0; const short WAITING_STATUS_CODE = 1; const short WAITING_FIRST_LINE_TERMINATION = 3; const short COLECTING_KEY = 4; const short WAITING_END_KEY = 5; const short COLECTING_VAL = 6; const short WAITING_END_VAL = 7; short state = WAITING_FIRST_SPACE; private_BearHttpsKeyVal *current_key_vall = NULL; for(int i =3 ; i < headers_end;i++){ if(self->raw_content[i] == ' ' && state == WAITING_FIRST_SPACE){ state = WAITING_STATUS_CODE; continue; } if(self->raw_content[i] != ' ' && state == WAITING_STATUS_CODE){ self->status_code = atoi((const char*)self->raw_content + i); state = WAITING_FIRST_LINE_TERMINATION; continue; } if(self->raw_content[i] == '\n' && self->raw_content[i-1] =='\r' && state == WAITING_FIRST_LINE_TERMINATION){ state = COLECTING_KEY; continue; } if(state == COLECTING_KEY && self->raw_content[i] != ' '){ current_key_vall = private_newBearHttpsKeyVal(); private_BearHttpsKeyVal_set_key(current_key_vall,(char*)self->raw_content+i,BEARSSL_HTTPS_REFERENCE); state = WAITING_END_KEY; continue; } if(state == WAITING_END_KEY && self->raw_content[i] == ':'){ self->raw_content[i] = '\0'; state = COLECTING_VAL; continue; } if(state == COLECTING_VAL && self->raw_content[i] != ' '){ private_BearHttpsKeyVal_set_value(current_key_vall,(char*)self->raw_content+i,BEARSSL_HTTPS_REFERENCE); state = WAITING_END_VAL; continue; } if( self->raw_content[i-1] =='\r' && self->raw_content[i] == '\n' && state == WAITING_END_VAL){ self->raw_content[i-1] = '\0'; private_BearHttpsHeaders_add_keyval(self->headers,current_key_vall); current_key_vall = NULL; state = COLECTING_KEY; continue; } } char *content_length = BearHttpsResponse_get_header_value_by_sanitized_key(self,"contentlength"); if(content_length != NULL){ self->user_content_length = atol(content_length); } } void private_BearHttpsResponse_read_til_end_of_headers_or_reach_limit( BearHttpsResponse *self, int chunk_size, double factor_headers_growth ){ self->raw_content = (unsigned char *)BearsslHttps_allocate(chunk_size+2); long content_allocated = chunk_size; long content_size = 0; while(true){ //apply the factor realloc while(content_size + chunk_size >= content_allocated -2 ){ content_allocated = (long)(content_allocated * factor_headers_growth); self->raw_content = (unsigned char*)BearsslHttps_reallocate(self->raw_content,content_allocated); } //we create a buff str , to allow 'append' into the content unsigned char *content_point = (self->raw_content +content_size); int readded = private_BearHttpsResponse_read_chunck_raw(self,content_point, chunk_size); if(readded == 0){ BearHttpsResponse_set_error(self,"invalid http response",BEARSSL_HTTPS_INVALID_HTTP_RESPONSE); return; } if(readded < 0){ char error_buff[100] ={0}; snprintf(error_buff,sizeof(error_buff),"invalid read code: %d",readded); BearHttpsResponse_set_error(self,error_buff,BEARSSL_HTTPS_INVALID_READ_CODE); return; } for(int i = 3; i < readded;i++){ if( content_point[i-3] == '\r' && content_point[i-2] == '\n' && content_point[i-1] == '\r' && content_point[i] == '\n' ) { self->body_start_index =content_size + i+1; self->body_size = ((content_size+readded) - self->body_start_index); self->extra_body_remaning_to_send = self->body_size; self->body_readded = self->body_size; self->body = (unsigned char*)BearsslHttps_allocate(self->body_size+2); memcpy(self->body,self->raw_content + self->body_start_index,self->body_size); self->body[self->body_size] = '\0'; private_BearHttpsResponse_parse_headers(self,content_size + i-1); return; } } content_size+=readded; } BearHttpsResponse_set_error(self,"invalid http response",BEARSSL_HTTPS_INVALID_HTTP_RESPONSE); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end int private_BearHttpsResponse_write(BearHttpsResponse *self,unsigned char *bufer,long size){ if(BearHttpsResponse_error(self)){ return -1; } if(self->is_https){ return br_sslio_write_all(&self->ssl_io, bufer, size); } long sended = 0; while(sended < size){ long sended_now = Universal_send(self->connection_file_descriptor, bufer+sended, size-sended,0); if(sended_now < 0){ BearHttpsResponse_set_error(self,"error sending data",BEARSSL_HTTPS_IMPOSSIBLE_TO_SEND_DATA); return sended_now; } sended += sended_now; } return sended; } int private_BearHttpsResponse_read_chunck_raw(BearHttpsResponse *self,unsigned char *buffer,long size){ if(BearHttpsResponse_error(self)){ return -1; } if(self->is_https){ return br_sslio_read(&self->ssl_io, buffer, size); } return Universal_recv(self->connection_file_descriptor, buffer, size,0); } int BearHttpsResponse_read_body_chunck(BearHttpsResponse *self,unsigned char *buffer,long size){ if(BearHttpsResponse_error(self)){ return -1; } if(self->body_readded == self->user_content_length && self->user_content_length != 0){ return 0; } long total_prev_sended = 0; while (self->extra_body_remaning_to_send > 0) { if(total_prev_sended >= size){ return total_prev_sended; } buffer[total_prev_sended] = self->body[total_prev_sended]; self->extra_body_remaning_to_send-=1; total_prev_sended+=1; } long readded = private_BearHttpsResponse_read_chunck_raw(self,buffer+total_prev_sended,size-total_prev_sended); if(readded < 0){ BearHttpsResponse_set_error(self,"error reading body",BEARSSL_HTTPS_IMPOSSIBLE_TO_READ_BODY); return readded; } if(readded> 0){ self->body_readded+=readded; } int total_readded = readded + total_prev_sended; buffer[total_readded] = 0; return total_readded; } unsigned char *BearHttpsResponse_read_body(BearHttpsResponse *self){ if(BearHttpsResponse_error(self)){ return NULL; } long body_allocated = self->body_size; long size_to_read ; if(self->body_readed){ return self->body; } if(self->user_content_length){ body_allocated = self->user_content_length+2; if(self->max_body_size != -1 && body_allocated > self->max_body_size){ BearHttpsResponse_set_error(self,"body size is bigger than max body size",BEARSSL_HTTPS_BODY_SIZE_ITS_BIGGER_THAN_LIMIT); BearsslHttps_free(self->body); self->body = NULL; return NULL; } self->body = (unsigned char *)BearsslHttps_reallocate(self->body,body_allocated); if(self->body == NULL){ BearHttpsResponse_set_error(self,"error allocating memory",BEARSSL_HTTPS_ALOCATION_FAILED); return NULL; } size_to_read = self->user_content_length - self->body_readded; } if(!self->user_content_length){ body_allocated = self->body_size + self->body_chunk_size+ 2; self->body = (unsigned char *)BearsslHttps_reallocate(self->body,body_allocated); size_to_read = self->body_chunk_size; } unsigned char *buffer = (unsigned char*)(self->body + self->body_readded); while(true){ while(self->body_size + self->body_chunk_size + 2 > body_allocated){ body_allocated = body_allocated * self->body_realloc_factor; if(self->max_body_size != -1 && body_allocated > self->max_body_size){ BearHttpsResponse_set_error(self,"body size is bigger than max body size",BEARSSL_HTTPS_BODY_SIZE_ITS_BIGGER_THAN_LIMIT); BearsslHttps_free(self->body); self->body = NULL; return NULL; } self->body = (unsigned char *)BearsslHttps_reallocate(self->body,body_allocated); if(self->body == NULL){ BearHttpsResponse_set_error(self,"error allocating memory",BEARSSL_HTTPS_ALOCATION_FAILED); return NULL; } buffer = (unsigned char*)(self->body + self->body_readded); } if(self->body_readded == self->user_content_length && self->user_content_length != 0){ break; } long readded = private_BearHttpsResponse_read_chunck_raw(self,buffer,size_to_read); if(readded <= 0 ){ break; } if(self->user_content_length){ size_to_read -= readded; } self->body_readded += readded; self->body_size += readded; buffer += readded; } self->body_readed = true; self->body[self->body_size] = '\0'; return self->body; } const char *BearHttpsResponse_read_body_str(BearHttpsResponse *self){ if(BearHttpsResponse_error(self)){ return NULL; } unsigned char *body = BearHttpsResponse_read_body(self); if(body == NULL){ return NULL; } //check if its a binary for(int i = 0; i < self->body_size; i++){ if(body[i] == '\0'){ BearHttpsResponse_set_error(self,"body is binary",BEARSSL_HTTPS_BODY_ITS_BINARY); BearsslHttps_free(self->body); self->body = NULL; return NULL; } } return (const char *)body; } #ifndef BEARSSL_HTTPS_MOCK_CJSON cJSON * BearHttpsResponse_read_body_json(BearHttpsResponse *self){ if(BearHttpsResponse_error(self)){ return NULL; } const char *body = BearHttpsResponse_read_body_str(self); if(body == NULL){ return NULL; } self->json_body = cJSON_Parse(body); free((void *)body); self->body = NULL; if(self->json_body == NULL){ BearHttpsResponse_set_error(self,"error parsing json",BEARSSL_HTTPS_BODY_ITS_NOT_A_VALID_JSON); return NULL; } return self->json_body; } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end BearHttpsResponse *private_newBearHttpsResponse(){ BearHttpsResponse *self = (BearHttpsResponse *)malloc(sizeof(BearHttpsResponse)); *self = (BearHttpsResponse){0}; self->status_code = 0; self->headers = private_newBearHttpsHeaders(); self->max_body_size = -1; self->body_chunk_size = BEARSSL_BODY_CHUNK_SIZE; self->body_realloc_factor = BEARSSL_BODY_REALLOC_FACTOR; self->body = NULL; return self; } void private_BearHttpsResponse_start_bearssl_props(BearHttpsResponse *self, const char *hostname,br_x509_trust_anchor *trust_anchors, size_t trusted_anchors_size) { self->is_https = true; if(trust_anchors && trusted_anchors_size > 0){ br_ssl_client_init_full(&self->ssl_client, &self->certification_context, trust_anchors, trusted_anchors_size); } else{ br_ssl_client_init_full(&self->ssl_client, &self->certification_context, TAs, TAs_NUM); } br_ssl_engine_set_all_flags(& self->ssl_client.eng, BR_OPT_TOLERATE_NO_CLIENT_AUTH); br_ssl_engine_set_buffer(&self->ssl_client.eng, self->bear_buffer, sizeof(self->bear_buffer), 1); br_ssl_client_reset(&self->ssl_client, hostname, 0); br_sslio_init(&self->ssl_io, &self->ssl_client.eng, private_BearHttps_sock_read, &self->connection_file_descriptor, private_BearHttps_sock_write, &self->connection_file_descriptor ); } int BearHttpsResponse_get_status_code(BearHttpsResponse*self){ if(BearHttpsResponse_error(self)){ return -1; } return self->status_code; } int BearHttpsResponse_get_body_size(BearHttpsResponse*self){ return self->body_size; } bool BearHttpsResponse_error(BearHttpsResponse*self){ return self->error_msg != NULL; } void BearHttpsResponse_set_error(BearHttpsResponse*self,const char *msg,int error_code){ self->error_msg = private_BearsslHttps_strdup(msg); self->error_code = error_code; } char* BearHttpsResponse_get_error_msg(BearHttpsResponse*self){ return self->error_msg; } int BearHttpsResponse_get_error_code(BearHttpsResponse*self){ return self->error_code; } void BearHttpsResponse_free(BearHttpsResponse *self){ Universal_close(self->connection_file_descriptor); if(self->is_https){ br_ssl_client_zero(&self->ssl_client); } private_BearHttpsHeaders_free(self->headers); if(self->raw_content){ free(self->raw_content); } #ifndef BEARSSL_HTTPS_MOCK_CJSON if(self->json_body){ cJSON_Delete(self->json_body); } #endif if(self->body){ free(self->body); } if(self->error_msg){ free(self->error_msg); } free(self); } int BearHttpsResponse_get_headers_size(BearHttpsResponse*self){ return self->headers->size; } char* BearHttpsResponse_get_header_value_by_index(BearHttpsResponse*self,int index){ private_BearHttpsKeyVal * key_vall = private_BearHttpsHeaders_get_key_val_by_index(self->headers,index); if(key_vall == NULL){ return NULL; } return key_vall->value; } char* BearHttpsResponse_get_header_key_by_index(BearHttpsResponse*self,int index){ private_BearHttpsKeyVal * key_vall = private_BearHttpsHeaders_get_key_val_by_index(self->headers,index); if(key_vall == NULL){ return NULL; } return key_vall->key; } char* BearHttpsResponse_get_header_value_by_key(BearHttpsResponse*self,const char *key){ for(int i = 0; i < self->headers->size;i++){ private_BearHttpsKeyVal * current_key_val = self->headers->keyvals[i]; if(private_BearsslHttp_strcmp(current_key_val->key,key) == 0){ return current_key_val->value; } } return NULL; } void BearHttpsResponse_set_max_body_size(BearHttpsResponse*self,long size){ self->max_body_size = size; } void BearHttpsResponse_set_body_read_props(BearHttpsResponse*self,int chunk_size,double realloc_factor){ self->body_chunk_size = chunk_size; self->body_realloc_factor = realloc_factor; } char* BearHttpsResponse_get_header_value_by_sanitized_key(BearHttpsResponse*self,const char *key){ long key_size = private_BearsslHttps_strlen(key); for(int i = 0; i < self->headers->size;i++){ private_BearHttpsKeyVal * current_key_val = self->headers->keyvals[i]; if(private_BearHttps_is_sanitize_key(current_key_val->key,key,key_size)){ return current_key_val->value; } } return NULL; } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #ifdef _WIN32 typedef __m128i __m128i_u; #endif #if !defined(BEARSSL_HTTPS_MOCK_UNIVERSAL_SOCKET_DEFINE) && defined(BEARSSL_HTTPS_UNIVERSAL_SOCKET_DECLARATED) /* MIT License Copyright (c) 2024 Samuel Henrique Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef UniversalSocket_def #define UniversalSocket_def //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end extern ssize_t Universal_send (int fd, const void *buf, size_t n, int flags){ return send(fd,buf,n,flags); } #if !defined(_DEFAULT_INET_PTON_AND_INET_NTOP_) extern const char *Universal_inet_ntop(int af, const void *src, char *dst, Universal_socket_len size){ if (af == AF_INET) { unsigned char *p = (unsigned char *)src; snprintf(dst, size, "%u.%u.%u.%u", p[0], p[1], p[2], p[3]); return dst; } else if (af == AF_INET6) { unsigned char *p = (unsigned char *)src; int i; int offset = 0; for (i = 0; i < 8; i++) { if (offset < size) { offset += snprintf(dst + offset, size - offset, "%x", (p[i * 2] << 8) | p[i * 2 + 1]); } if (i < 7 && offset < size) { dst[offset++] = ':'; } } return dst; } return NULL; } extern int Universal_inet_pton(int af, const char *src, void *dst){ if (af == AF_INET) { unsigned char *p = (unsigned char *)dst; int values[4]; if (sscanf(src, "%d.%d.%d.%d", &values[0], &values[1], &values[2], &values[3]) != 4) { return 0; } for (int i = 0; i < 4; i++) { if (values[i] < 0 || values[i] > 255) { return 0; } p[i] = (unsigned char)values[i]; } return 1; } else if (af == AF_INET6) { unsigned char *p = (unsigned char *)dst; int values[8]; int count = 0; const char *ptr = src; int i; while (*ptr) { if (sscanf(ptr, "%x", &values[count]) != 1) { return 0; } count++; while (*ptr && isxdigit(*ptr)) { ptr++; } if (*ptr == ':') { ptr++; } if (count > 8) { return 0; } } if (count != 8) { return 0; } for (i = 0; i < 8; i++) { p[i * 2] = (unsigned char)(values[i] >> 8); p[i * 2 + 1] = (unsigned char)(values[i] & 0xFF); } return 1; } return 0; } #else extern const char *Universal_inet_ntop(int af, const void *src, char *dst, Universal_socket_len size){ return inet_ntop(af, src, dst, size); } extern int Universal_inet_pton(int af, const char *src, void *dst){ return inet_pton(af, src, dst); } #endif extern uint32_t Universal_ntohl(uint32_t netlong){ return ntohl(netlong); } uint16_t Universal_htons(uint16_t value) { return htons(value); } uint16_t Universal_ntohs(uint16_t value) { return ntohs(value); } extern in_addr_t Universal_inet_addr(const char *ip) { return inet_addr(ip); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end extern int Universal_bind (int fd, Universal_sockaddr_in *addrin , Universal_socket_len len){ return bind(fd,(const struct sockaddr *)addrin,len); } extern int Universal_accept (int fd, Universal_sockaddr_in *addrin, Universal_socket_len *adrr_len){ return accept(fd,( struct sockaddr *)addrin, adrr_len); } extern int Universal_listen (int fd, int n){ return listen(fd,n); } extern int Universal_connect(int sockfd, const Universal_sockaddr *addr, socklen_t addrlen){ return connect(sockfd, addr, addrlen); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end const char* Universal_gai_strerror(int e_code){ return gai_strerror(e_code); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end int Universal_socket (int domain, int type, int protocol){ return socket(domain,type,protocol); } int Universal_ZeroMemory(void *ptr, size_t num){ if (ptr == NULL || num <= 0) { return -1; } memset(ptr, 0, (unsigned long long)num); return 0; } int Universal_setsockopt( Universal_socket_int sockfd, int level, int optname, const void *optval, Universal_socket_len optlen ){ return setsockopt(sockfd, level, optname, (const char *)optval, optlen); } int Universal_getsockopt( Universal_socket_int sockfd, int level, int optname, void *optval, Universal_socket_len *optlen ){ return getsockopt(sockfd, level, optname, (char *)optval, optlen); } Universal_hostent *Universal_gethostbyname(const char *hostname){ return gethostbyname(hostname); } //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(__linux__) extern const char* Universal_inet_ntoa(Universal_in_addr addr) { static char buffer[INET_ADDRSTRLEN]; return inet_ntop(UNI_AF_INET, &addr, buffer, INET_ADDRSTRLEN); } extern ssize_t Universal_recv (int fd, void *buf, size_t n, int flags){ return recv(fd, buf, n,flags); } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(__linux__) extern char *Universal_GetLastError(){ return strerror(errno); } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(__linux__) extern int Universal_start_all (){ return 0; } extern int Universal_end (){ return 0; } extern int Universal_close (int fd){ return close(fd); } //#if defined(_GET_ADDR_INFO_DEFAULT_) int Universal_getaddrinfo(const char *node, const char *service, const Universal_addrinfo *hints, Universal_addrinfo **res){ return getaddrinfo(node, service, hints, res); } void Universal_freeaddrinfo(Universal_addrinfo *addrinfo_ptr){ freeaddrinfo(addrinfo_ptr); } //#endif #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(_WIN32) extern const char* Universal_inet_ntoa(Universal_in_addr addr) { return inet_ntoa(addr); } ssize_t private_Universal_recv_all(int fd, void *buf, size_t n){ int max = 0; int received; while (max < n) { unsigned char *ptr = (unsigned char*)buf + max; received = recv(fd,ptr, n - max, 0); if (received <= 0) { return max; } max += received; } return max; } extern ssize_t Universal_recv (int fd, void *buf, size_t n, int flags){ if(flags == UNI_MSG_WAITALL){ return private_Universal_recv_all(fd, buf, n); } return recv(fd, buf, n, flags); } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(_WIN32) extern char *Universal_GetLastError(){ static char errorBuffer[256]; DWORD dwError = WSAGetLastError(); if (dwError == 0) { return "Nenhum erro"; } FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwError, 0, errorBuffer, sizeof(errorBuffer), NULL ); return errorBuffer; } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end #if defined(_WIN32) extern int Universal_start_all (){ WSADATA wsa; int error = WSAStartup(MAKEWORD(2, 2), &wsa); return error; } extern int Universal_end (){ return WSACleanup(); } extern int Universal_close (int fd){ return closesocket(fd); } //#if defined(_GET_ADDR_INFO_DEFAULT_) int Universal_getaddrinfo(const char *node, const char *service, const Universal_addrinfo *hints, Universal_addrinfo **res){ Universal_hostent *he; he = Universal_gethostbyname(node); if(he == NULL){ return 1; } *res = (Universal_addrinfo *)malloc(sizeof(Universal_addrinfo)); if (*res == NULL) { return 1; } (*res)->ai_flags = 0; (*res)->ai_family = UNI_AF_INET; (*res)->ai_socktype = UNI_SOCK_STREAM; (*res)->ai_protocol = UNI_IPPROTO_TCP; (*res)->ai_addrlen = sizeof(Universal_sockaddr_in); Universal_sockaddr_in *sa_in = (Universal_sockaddr_in *)malloc(sizeof(Universal_sockaddr_in)); if (sa_in == NULL) { free(*res); return 1; } Universal_in_addr **addr_list; sa_in->sin_family = UNI_AF_INET; addr_list = (Universal_in_addr **)he->h_addr_list; sa_in->sin_addr = *addr_list[0]; (*res)->ai_addr = (Universal_sockaddr *)sa_in; (*res)->ai_canonname = strdup(he->h_name); (*res)->ai_next = NULL; return 0; } void Universal_freeaddrinfo(Universal_addrinfo *addrinfo_ptr){ free(addrinfo_ptr->ai_addr); free(addrinfo_ptr->ai_canonname); free(addrinfo_ptr); } //#endif #endif #endif #endif #if !defined(BEARSSL_HTTPS_MOCK_BEARSSL_DEFINE) && defined(BEARSSL_HTTPS_BEARSSL_DECLARATED) #define BR_ENABLE_INTRINSICS 1 #ifndef BearSSLSingleUnit_fdefine #define BearSSLSingleUnit_fdefine //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Implementation Notes * ==================== * * The combined CTR + CBC-MAC functions can only handle full blocks, * so some buffering is necessary. * * - 'ptr' contains a value from 0 to 15, which is the number of bytes * accumulated in buf[] that still needs to be processed with the * current CBC-MAC computation. * * - When processing the message itself, CTR encryption/decryption is * also done at the same time. The first 'ptr' bytes of buf[] then * contains the plaintext bytes, while the last '16 - ptr' bytes of * buf[] are the remnants of the stream block, to be used against * the next input bytes, when available. When 'ptr' is 0, the * contents of buf[] are to be ignored. * * - The current counter and running CBC-MAC values are kept in 'ctr' * and 'cbcmac', respectively. */ /* see bearssl_block.h */ void br_ccm_init(br_ccm_context *ctx, const br_block_ctrcbc_class **bctx) { ctx->bctx = bctx; } /* see bearssl_block.h */ int br_ccm_reset(br_ccm_context *ctx, const void *nonce, size_t nonce_len, uint64_t aad_len, uint64_t data_len, size_t tag_len) { unsigned char tmp[16]; unsigned u, q; if (nonce_len < 7 || nonce_len > 13) { return 0; } if (tag_len < 4 || tag_len > 16 || (tag_len & 1) != 0) { return 0; } q = 15 - (unsigned)nonce_len; ctx->tag_len = tag_len; /* * Block B0, to start CBC-MAC. */ tmp[0] = (aad_len > 0 ? 0x40 : 0x00) | (((unsigned)tag_len - 2) << 2) | (q - 1); memcpy(tmp + 1, nonce, nonce_len); for (u = 0; u < q; u ++) { tmp[15 - u] = (unsigned char)data_len; data_len >>= 8; } if (data_len != 0) { /* * If the data length was not entirely consumed in the * loop above, then it exceeds the maximum limit of * q bytes (when encoded). */ return 0; } /* * Start CBC-MAC. */ memset(ctx->cbcmac, 0, sizeof ctx->cbcmac); (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, tmp, sizeof tmp); /* * Assemble AAD length header. */ if ((aad_len >> 32) != 0) { ctx->buf[0] = 0xFF; ctx->buf[1] = 0xFF; br_enc64be(ctx->buf + 2, aad_len); ctx->ptr = 10; } else if (aad_len >= 0xFF00) { ctx->buf[0] = 0xFF; ctx->buf[1] = 0xFE; br_enc32be(ctx->buf + 2, (uint32_t)aad_len); ctx->ptr = 6; } else if (aad_len > 0) { br_enc16be(ctx->buf, (unsigned)aad_len); ctx->ptr = 2; } else { ctx->ptr = 0; } /* * Make initial counter value and compute tag mask. */ ctx->ctr[0] = q - 1; memcpy(ctx->ctr + 1, nonce, nonce_len); memset(ctx->ctr + 1 + nonce_len, 0, q); memset(ctx->tagmask, 0, sizeof ctx->tagmask); (*ctx->bctx)->ctr(ctx->bctx, ctx->ctr, ctx->tagmask, sizeof ctx->tagmask); return 1; } /* see bearssl_block.h */ void br_ccm_aad_inject(br_ccm_context *ctx, const void *data, size_t len) { const unsigned char *dbuf; size_t ptr; dbuf = (unsigned char*)data; /* * Complete partial block, if needed. */ ptr = ctx->ptr; if (ptr != 0) { size_t clen; clen = (sizeof ctx->buf) - ptr; if (clen > len) { memcpy(ctx->buf + ptr, dbuf, len); ctx->ptr = ptr + len; return; } memcpy(ctx->buf + ptr, dbuf, clen); dbuf += clen; len -= clen; (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } /* * Process complete blocks. */ ptr = len & 15; len -= ptr; (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, dbuf, len); dbuf += len; /* * Copy last partial block in the context buffer. */ memcpy(ctx->buf, dbuf, ptr); ctx->ptr = ptr; } /* see bearssl_block.h */ void br_ccm_flip(br_ccm_context *ctx) { size_t ptr; /* * Complete AAD partial block with zeros, if necessary. */ ptr = ctx->ptr; if (ptr != 0) { memset(ctx->buf + ptr, 0, (sizeof ctx->buf) - ptr); (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); ctx->ptr = 0; } /* * Counter was already set by br_ccm_reset(). */ } /* see bearssl_block.h */ void br_ccm_run(br_ccm_context *ctx, int encrypt, void *data, size_t len) { unsigned char *dbuf; size_t ptr; dbuf = (unsigned char*)data; /* * Complete a partial block, if any: ctx->buf[] contains * ctx->ptr plaintext bytes (already reported), and the other * bytes are CTR stream output. */ ptr = ctx->ptr; if (ptr != 0) { size_t clen; size_t u; clen = (sizeof ctx->buf) - ptr; if (clen > len) { clen = len; } if (encrypt) { for (u = 0; u < clen; u ++) { unsigned w, x; w = ctx->buf[ptr + u]; x = dbuf[u]; ctx->buf[ptr + u] = x; dbuf[u] = w ^ x; } } else { for (u = 0; u < clen; u ++) { unsigned w; w = ctx->buf[ptr + u] ^ dbuf[u]; dbuf[u] = w; ctx->buf[ptr + u] = w; } } dbuf += clen; len -= clen; ptr += clen; if (ptr < sizeof ctx->buf) { ctx->ptr = ptr; return; } (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } /* * Process all complete blocks. Note that the ctrcbc API is for * encrypt-then-MAC (CBC-MAC is computed over the encrypted * blocks) while CCM uses MAC-and-encrypt (CBC-MAC is computed * over the plaintext blocks). Therefore, we need to use the * _decryption_ function for encryption, and the encryption * function for decryption (this works because CTR encryption * and decryption are identical, so the choice really is about * computing the CBC-MAC before or after XORing with the CTR * stream). */ ptr = len & 15; len -= ptr; if (encrypt) { (*ctx->bctx)->decrypt(ctx->bctx, ctx->ctr, ctx->cbcmac, dbuf, len); } else { (*ctx->bctx)->encrypt(ctx->bctx, ctx->ctr, ctx->cbcmac, dbuf, len); } dbuf += len; /* * If there is some remaining data, then we need to compute an * extra block of CTR stream. */ if (ptr != 0) { size_t u; memset(ctx->buf, 0, sizeof ctx->buf); (*ctx->bctx)->ctr(ctx->bctx, ctx->ctr, ctx->buf, sizeof ctx->buf); if (encrypt) { for (u = 0; u < ptr; u ++) { unsigned w, x; w = ctx->buf[u]; x = dbuf[u]; ctx->buf[u] = x; dbuf[u] = w ^ x; } } else { for (u = 0; u < ptr; u ++) { unsigned w; w = ctx->buf[u] ^ dbuf[u]; dbuf[u] = w; ctx->buf[u] = w; } } } ctx->ptr = ptr; } /* see bearssl_block.h */ size_t br_ccm_get_tag(br_ccm_context *ctx, void *tag) { size_t ptr; size_t u; /* * If there is some buffered data, then we need to pad it with * zeros and finish up CBC-MAC. */ ptr = ctx->ptr; if (ptr != 0) { memset(ctx->buf + ptr, 0, (sizeof ctx->buf) - ptr); (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } /* * XOR the tag mask into the CBC-MAC output. */ for (u = 0; u < ctx->tag_len; u ++) { ctx->cbcmac[u] ^= ctx->tagmask[u]; } memcpy(tag, ctx->cbcmac, ctx->tag_len); return ctx->tag_len; } /* see bearssl_block.h */ uint32_t br_ccm_check_tag(br_ccm_context *ctx, const void *tag) { unsigned char tmp[16]; size_t u, tag_len; uint32_t z; tag_len = br_ccm_get_tag(ctx, tmp); z = 0; for (u = 0; u < tag_len; u ++) { z |= tmp[u] ^ ((const unsigned char *)tag)[u]; } return EQ0(z); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Implementation Notes * ==================== * * The combined CTR + CBC-MAC functions can only handle full blocks, * so some buffering is necessary. Moreover, EAX has a special padding * rule for CBC-MAC, which implies that we cannot compute the MAC over * the last received full block until we know whether we are at the * end of the data or not. * * - 'ptr' contains a value from 1 to 16, which is the number of bytes * accumulated in buf[] that still needs to be processed with the * current OMAC computation. Beware that this can go to 16: a * complete block cannot be processed until it is known whether it * is the last block or not. However, it can never be 0, because * OMAC^t works on an input that is at least one-block long. * * - When processing the message itself, CTR encryption/decryption is * also done at the same time. The first 'ptr' bytes of buf[] then * contains the encrypted bytes, while the last '16 - ptr' bytes of * buf[] are the remnants of the stream block, to be used against * the next input bytes, when available. * * - The current counter and running CBC-MAC values are kept in 'ctr' * and 'cbcmac', respectively. * * - The derived keys for padding are kept in L2 and L4 (double and * quadruple of Enc_K(0^n), in GF(2^128), respectively). */ /* * Start an OMAC computation; the first block is the big-endian * representation of the provided value ('val' must fit on one byte). * We make it a delayed block because it may also be the last one, */ static void omac_start(br_eax_context *ctx, unsigned val) { memset(ctx->cbcmac, 0, sizeof ctx->cbcmac); memset(ctx->buf, 0, sizeof ctx->buf); ctx->buf[15] = val; ctx->ptr = 16; } /* * Double a value in finite field GF(2^128), defined with modulus * X^128+X^7+X^2+X+1. */ static void double_gf128(unsigned char *dst, const unsigned char *src) { unsigned cc; int i; cc = 0x87 & -((unsigned)src[0] >> 7); for (i = 15; i >= 0; i --) { unsigned z; z = (src[i] << 1) ^ cc; cc = z >> 8; dst[i] = (unsigned char)z; } } /* * Apply padding to the last block, currently in ctx->buf (with * ctx->ptr bytes), and finalize OMAC computation. */ static void do_pad(br_eax_context *ctx) { unsigned char *pad; size_t ptr, u; ptr = ctx->ptr; if (ptr == 16) { pad = ctx->L2; } else { ctx->buf[ptr ++] = 0x80; memset(ctx->buf + ptr, 0x00, 16 - ptr); pad = ctx->L4; } for (u = 0; u < sizeof ctx->buf; u ++) { ctx->buf[u] ^= pad[u]; } (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } /* * Apply CBC-MAC on the provided data, with buffering management. * * Upon entry, two situations are acceptable: * * ctx->ptr == 0: there is no data to process in ctx->buf * ctx->ptr == 16: there is a full block of unprocessed data in ctx->buf * * Upon exit, ctx->ptr may be zero only if it was already zero on entry, * and len == 0. In all other situations, ctx->ptr will be non-zero on * exit (and may have value 16). */ static void do_cbcmac_chunk(br_eax_context *ctx, const void *data, size_t len) { size_t ptr; if (len == 0) { return; } ptr = len & (size_t)15; if (ptr == 0) { len -= 16; ptr = 16; } else { len -= ptr; } if (ctx->ptr == 16) { (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, data, len); memcpy(ctx->buf, (const unsigned char *)data + len, ptr); ctx->ptr = ptr; } /* see bearssl_aead.h */ void br_eax_init(br_eax_context *ctx, const br_block_ctrcbc_class **bctx) { unsigned char tmp[16], iv[16]; ctx->vtable = &br_eax_vtable; ctx->bctx = bctx; /* * Encrypt a whole-zero block to compute L2 and L4. */ memset(tmp, 0, sizeof tmp); memset(iv, 0, sizeof iv); (*bctx)->ctr(bctx, iv, tmp, sizeof tmp); double_gf128(ctx->L2, tmp); double_gf128(ctx->L4, ctx->L2); } /* see bearssl_aead.h */ void br_eax_capture(const br_eax_context *ctx, br_eax_state *st) { /* * We capture the three OMAC* states _after_ processing the * initial block (assuming that nonce, message and AAD are * all non-empty). */ int i; memset(st->st, 0, sizeof st->st); for (i = 0; i < 3; i ++) { unsigned char tmp[16]; memset(tmp, 0, sizeof tmp); tmp[15] = (unsigned char)i; (*ctx->bctx)->mac(ctx->bctx, st->st[i], tmp, sizeof tmp); } } /* see bearssl_aead.h */ void br_eax_reset(br_eax_context *ctx, const void *nonce, size_t len) { /* * Process nonce with OMAC^0. */ omac_start(ctx, 0); do_cbcmac_chunk(ctx, nonce, len); do_pad(ctx); memcpy(ctx->nonce, ctx->cbcmac, sizeof ctx->cbcmac); /* * Start OMAC^1 for the AAD ("header" in the EAX specification). */ omac_start(ctx, 1); /* * We use ctx->head[0] as temporary flag to mark that we are * using a "normal" reset(). */ ctx->head[0] = 0; } /* see bearssl_aead.h */ void br_eax_reset_pre_aad(br_eax_context *ctx, const br_eax_state *st, const void *nonce, size_t len) { if (len == 0) { omac_start(ctx, 0); } else { memcpy(ctx->cbcmac, st->st[0], sizeof ctx->cbcmac); ctx->ptr = 0; do_cbcmac_chunk(ctx, nonce, len); } do_pad(ctx); memcpy(ctx->nonce, ctx->cbcmac, sizeof ctx->cbcmac); memcpy(ctx->cbcmac, st->st[1], sizeof ctx->cbcmac); ctx->ptr = 0; memcpy(ctx->ctr, st->st[2], sizeof ctx->ctr); /* * We use ctx->head[0] as a flag to indicate that we use a * a recorded state, with ctx->ctr containing the preprocessed * first block for OMAC^2. */ ctx->head[0] = 1; } /* see bearssl_aead.h */ void br_eax_reset_post_aad(br_eax_context *ctx, const br_eax_state *st, const void *nonce, size_t len) { if (len == 0) { omac_start(ctx, 0); } else { memcpy(ctx->cbcmac, st->st[0], sizeof ctx->cbcmac); ctx->ptr = 0; do_cbcmac_chunk(ctx, nonce, len); } do_pad(ctx); memcpy(ctx->nonce, ctx->cbcmac, sizeof ctx->cbcmac); memcpy(ctx->ctr, ctx->nonce, sizeof ctx->nonce); memcpy(ctx->head, st->st[1], sizeof ctx->head); memcpy(ctx->cbcmac, st->st[2], sizeof ctx->cbcmac); ctx->ptr = 0; } /* see bearssl_aead.h */ void br_eax_aad_inject(br_eax_context *ctx, const void *data, size_t len) { size_t ptr; ptr = ctx->ptr; /* * If there is a partial block, first complete it. */ if (ptr < 16) { size_t clen; clen = 16 - ptr; if (len <= clen) { memcpy(ctx->buf + ptr, data, len); ctx->ptr = ptr + len; return; } memcpy(ctx->buf + ptr, data, clen); data = (const unsigned char *)data + clen; len -= clen; } /* * We now have a full block in buf[], and this is not the last * block. */ do_cbcmac_chunk(ctx, data, len); } /* see bearssl_aead.h */ void br_eax_flip(br_eax_context *ctx) { int from_capture; /* * ctx->head[0] may be non-zero if the context was reset with * a pre-AAD captured state. In that case, ctx->ctr[] contains * the state for OMAC^2 _after_ processing the first block. */ from_capture = ctx->head[0]; /* * Complete the OMAC computation on the AAD. */ do_pad(ctx); memcpy(ctx->head, ctx->cbcmac, sizeof ctx->cbcmac); /* * Start OMAC^2 for the encrypted data. * If the context was initialized from a captured state, then * the OMAC^2 value is in the ctr[] array. */ if (from_capture) { memcpy(ctx->cbcmac, ctx->ctr, sizeof ctx->cbcmac); ctx->ptr = 0; } else { omac_start(ctx, 2); } /* * Initial counter value for CTR is the processed nonce. */ memcpy(ctx->ctr, ctx->nonce, sizeof ctx->nonce); } /* see bearssl_aead.h */ void br_eax_run(br_eax_context *ctx, int encrypt, void *data, size_t len) { unsigned char *dbuf; size_t ptr; /* * Ensure that there is actual data to process. */ if (len == 0) { return; } dbuf = (unsigned char*)data; ptr = ctx->ptr; /* * We may have ptr == 0 here if we initialized from a captured * state. In that case, there is no partially consumed block * or unprocessed data. */ if (ptr != 0 && ptr != 16) { /* * We have a partially consumed block. */ size_t u, clen; clen = 16 - ptr; if (len <= clen) { clen = len; } if (encrypt) { for (u = 0; u < clen; u ++) { ctx->buf[ptr + u] ^= dbuf[u]; } memcpy(dbuf, ctx->buf + ptr, clen); } else { for (u = 0; u < clen; u ++) { unsigned dx, sx; sx = ctx->buf[ptr + u]; dx = dbuf[u]; ctx->buf[ptr + u] = dx; dbuf[u] = sx ^ dx; } } if (len <= clen) { ctx->ptr = ptr + clen; return; } dbuf += clen; len -= clen; } /* * We now have a complete encrypted block in buf[] that must still * be processed with OMAC, and this is not the final buf. * Exception: when ptr == 0, no block has been produced yet. */ if (ptr != 0) { (*ctx->bctx)->mac(ctx->bctx, ctx->cbcmac, ctx->buf, sizeof ctx->buf); } /* * Do CTR encryption or decryption and CBC-MAC for all full blocks * except the last. */ ptr = len & (size_t)15; if (ptr == 0) { len -= 16; ptr = 16; } else { len -= ptr; } if (encrypt) { (*ctx->bctx)->encrypt(ctx->bctx, ctx->ctr, ctx->cbcmac, dbuf, len); } else { (*ctx->bctx)->decrypt(ctx->bctx, ctx->ctr, ctx->cbcmac, dbuf, len); } dbuf += len; /* * Compute next block of CTR stream, and use it to finish * encrypting or decrypting the data. */ memset(ctx->buf, 0, sizeof ctx->buf); (*ctx->bctx)->ctr(ctx->bctx, ctx->ctr, ctx->buf, sizeof ctx->buf); if (encrypt) { size_t u; for (u = 0; u < ptr; u ++) { ctx->buf[u] ^= dbuf[u]; } memcpy(dbuf, ctx->buf, ptr); } else { size_t u; for (u = 0; u < ptr; u ++) { unsigned dx, sx; sx = ctx->buf[u]; dx = dbuf[u]; ctx->buf[u] = dx; dbuf[u] = sx ^ dx; } } ctx->ptr = ptr; } /* * Complete tag computation. The final tag is written in ctx->cbcmac. */ static void do_final(br_eax_context *ctx) { size_t u; do_pad(ctx); /* * Authentication tag is the XOR of the three OMAC outputs for * the nonce, AAD and encrypted data. */ for (u = 0; u < 16; u ++) { ctx->cbcmac[u] ^= ctx->nonce[u] ^ ctx->head[u]; } } /* see bearssl_aead.h */ void br_eax_get_tag(br_eax_context *ctx, void *tag) { do_final(ctx); memcpy(tag, ctx->cbcmac, sizeof ctx->cbcmac); } /* see bearssl_aead.h */ void br_eax_get_tag_trunc(br_eax_context *ctx, void *tag, size_t len) { do_final(ctx); memcpy(tag, ctx->cbcmac, len); } /* see bearssl_aead.h */ uint32_t br_eax_check_tag_trunc(br_eax_context *ctx, const void *tag, size_t len) { unsigned char tmp[16]; size_t u; int x; br_eax_get_tag(ctx, tmp); x = 0; for (u = 0; u < len; u ++) { x |= tmp[u] ^ ((const unsigned char *)tag)[u]; } return EQ0(x); } /* see bearssl_aead.h */ uint32_t br_eax_check_tag(br_eax_context *ctx, const void *tag) { return br_eax_check_tag_trunc(ctx, tag, 16); } /* see bearssl_aead.h */ const br_aead_class br_eax_vtable = { 16, (void (*)(const br_aead_class **, const void *, size_t)) &br_eax_reset, (void (*)(const br_aead_class **, const void *, size_t)) &br_eax_aad_inject, (void (*)(const br_aead_class **)) &br_eax_flip, (void (*)(const br_aead_class **, int, void *, size_t)) &br_eax_run, (void (*)(const br_aead_class **, void *)) &br_eax_get_tag, (uint32_t (*)(const br_aead_class **, const void *)) &br_eax_check_tag, (void (*)(const br_aead_class **, void *, size_t)) &br_eax_get_tag_trunc, (uint32_t (*)(const br_aead_class **, const void *, size_t)) &br_eax_check_tag_trunc }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Implementation Notes * ==================== * * Since CTR and GHASH implementations can handle only full blocks, a * 16-byte buffer (buf[]) is maintained in the context: * * - When processing AAD, buf[] contains the 0-15 unprocessed bytes. * * - When doing CTR encryption / decryption, buf[] contains the AES output * for the last partial block, to be used with the next few bytes of * data, as well as the already encrypted bytes. For instance, if the * processed data length so far is 21 bytes, then buf[0..4] contains * the five last encrypted bytes, and buf[5..15] contains the next 11 * AES output bytes to be XORed with the next 11 bytes of input. * * The recorded AES output bytes are used to complete the block when * the corresponding bytes are obtained. Note that buf[] always * contains the _encrypted_ bytes, whether we apply encryption or * decryption: these bytes are used as input to GHASH when the block * is complete. * * In both cases, the low bits of the data length counters (count_aad, * count_ctr) are used to work out the current situation. */ /* see bearssl_aead.h */ void br_gcm_init(br_gcm_context *ctx, const br_block_ctr_class **bctx, br_ghash gh) { unsigned char iv[12]; ctx->vtable = &br_gcm_vtable; ctx->bctx = bctx; ctx->gh = gh; /* * The GHASH key h[] is the raw encryption of the all-zero * block. Since we only have a CTR implementation, we use it * with an all-zero IV and a zero counter, to CTR-encrypt an * all-zero block. */ memset(ctx->h, 0, sizeof ctx->h); memset(iv, 0, sizeof iv); (*bctx)->run(bctx, iv, 0, ctx->h, sizeof ctx->h); } /* see bearssl_aead.h */ void br_gcm_reset(br_gcm_context *ctx, const void *iv, size_t len) { /* * If the provided nonce is 12 bytes, then this is the initial * IV for CTR mode; it will be used with a counter that starts * at 2 (value 1 is for encrypting the GHASH output into the tag). * * If the provided nonce has any other length, then it is hashed * (with GHASH) into a 16-byte value that will be the IV for CTR * (both 12-byte IV and 32-bit counter). */ if (len == 12) { memcpy(ctx->j0_1, iv, 12); ctx->j0_2 = 1; } else { unsigned char ty[16], tmp[16]; memset(ty, 0, sizeof ty); ctx->gh(ty, ctx->h, iv, len); memset(tmp, 0, 8); br_enc64be(tmp + 8, (uint64_t)len << 3); ctx->gh(ty, ctx->h, tmp, 16); memcpy(ctx->j0_1, ty, 12); ctx->j0_2 = br_dec32be(ty + 12); } ctx->jc = ctx->j0_2 + 1; memset(ctx->y, 0, sizeof ctx->y); ctx->count_aad = 0; ctx->count_ctr = 0; } /* see bearssl_aead.h */ void br_gcm_aad_inject(br_gcm_context *ctx, const void *data, size_t len) { size_t ptr, dlen; ptr = (size_t)ctx->count_aad & (size_t)15; if (ptr != 0) { /* * If there is a partial block, then we first try to * complete it. */ size_t clen; clen = 16 - ptr; if (len < clen) { memcpy(ctx->buf + ptr, data, len); ctx->count_aad += (uint64_t)len; return; } memcpy(ctx->buf + ptr, data, clen); ctx->gh(ctx->y, ctx->h, ctx->buf, 16); data = (const unsigned char *)data + clen; len -= clen; ctx->count_aad += (uint64_t)clen; } /* * Now AAD is aligned on a 16-byte block (with regards to GHASH). * We process all complete blocks, and save the last partial * block. */ dlen = len & ~(size_t)15; ctx->gh(ctx->y, ctx->h, data, dlen); memcpy(ctx->buf, (const unsigned char *)data + dlen, len - dlen); ctx->count_aad += (uint64_t)len; } /* see bearssl_aead.h */ void br_gcm_flip(br_gcm_context *ctx) { /* * We complete the GHASH computation if there is a partial block. * The GHASH implementation automatically applies padding with * zeros. */ size_t ptr; ptr = (size_t)ctx->count_aad & (size_t)15; if (ptr != 0) { ctx->gh(ctx->y, ctx->h, ctx->buf, ptr); } } /* see bearssl_aead.h */ void br_gcm_run(br_gcm_context *ctx, int encrypt, void *data, size_t len) { unsigned char *buf; size_t ptr, dlen; buf = (unsigned char*)data; ptr = (size_t)ctx->count_ctr & (size_t)15; if (ptr != 0) { /* * If we have a partial block, then we try to complete it. */ size_t u, clen; clen = 16 - ptr; if (len < clen) { clen = len; } for (u = 0; u < clen; u ++) { unsigned x, y; x = buf[u]; y = x ^ ctx->buf[ptr + u]; ctx->buf[ptr + u] = encrypt ? y : x; buf[u] = y; } ctx->count_ctr += (uint64_t)clen; buf += clen; len -= clen; if (ptr + clen < 16) { return; } ctx->gh(ctx->y, ctx->h, ctx->buf, 16); } /* * Process full blocks. */ dlen = len & ~(size_t)15; if (!encrypt) { ctx->gh(ctx->y, ctx->h, buf, dlen); } ctx->jc = (*ctx->bctx)->run(ctx->bctx, ctx->j0_1, ctx->jc, buf, dlen); if (encrypt) { ctx->gh(ctx->y, ctx->h, buf, dlen); } buf += dlen; len -= dlen; ctx->count_ctr += (uint64_t)dlen; if (len > 0) { /* * There is a partial block. */ size_t u; memset(ctx->buf, 0, sizeof ctx->buf); ctx->jc = (*ctx->bctx)->run(ctx->bctx, ctx->j0_1, ctx->jc, ctx->buf, 16); for (u = 0; u < len; u ++) { unsigned x, y; x = buf[u]; y = x ^ ctx->buf[u]; ctx->buf[u] = encrypt ? y : x; buf[u] = y; } ctx->count_ctr += (uint64_t)len; } } /* see bearssl_aead.h */ void br_gcm_get_tag(br_gcm_context *ctx, void *tag) { size_t ptr; unsigned char tmp[16]; ptr = (size_t)ctx->count_ctr & (size_t)15; if (ptr > 0) { /* * There is a partial block: encrypted/decrypted data has * been produced, but the encrypted bytes must still be * processed by GHASH. */ ctx->gh(ctx->y, ctx->h, ctx->buf, ptr); } /* * Final block for GHASH: the AAD and plaintext lengths (in bits). */ br_enc64be(tmp, ctx->count_aad << 3); br_enc64be(tmp + 8, ctx->count_ctr << 3); ctx->gh(ctx->y, ctx->h, tmp, 16); /* * Tag is the GHASH output XORed with the encryption of the * nonce with the initial counter value. */ memcpy(tag, ctx->y, 16); (*ctx->bctx)->run(ctx->bctx, ctx->j0_1, ctx->j0_2, tag, 16); } /* see bearssl_aead.h */ void br_gcm_get_tag_trunc(br_gcm_context *ctx, void *tag, size_t len) { unsigned char tmp[16]; br_gcm_get_tag(ctx, tmp); memcpy(tag, tmp, len); } /* see bearssl_aead.h */ uint32_t br_gcm_check_tag_trunc(br_gcm_context *ctx, const void *tag, size_t len) { unsigned char tmp[16]; size_t u; int x; br_gcm_get_tag(ctx, tmp); x = 0; for (u = 0; u < len; u ++) { x |= tmp[u] ^ ((const unsigned char *)tag)[u]; } return EQ0(x); } /* see bearssl_aead.h */ uint32_t br_gcm_check_tag(br_gcm_context *ctx, const void *tag) { return br_gcm_check_tag_trunc(ctx, tag, 16); } /* see bearssl_aead.h */ const br_aead_class br_gcm_vtable = { 16, (void (*)(const br_aead_class **, const void *, size_t)) &br_gcm_reset, (void (*)(const br_aead_class **, const void *, size_t)) &br_gcm_aad_inject, (void (*)(const br_aead_class **)) &br_gcm_flip, (void (*)(const br_aead_class **, int, void *, size_t)) &br_gcm_run, (void (*)(const br_aead_class **, void *)) &br_gcm_get_tag, (uint32_t (*)(const br_aead_class **, const void *)) &br_gcm_check_tag, (void (*)(const br_aead_class **, void *, size_t)) &br_gcm_get_tag_trunc, (uint32_t (*)(const br_aead_class **, const void *, size_t)) &br_gcm_check_tag_trunc }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_ccopy(uint32_t ctl, void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { uint32_t x, y; x = *s ++; y = *d; *d = MUX(ctl, x, y); d ++; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec16be(uint16_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec16be(buf); buf += 2; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec16le(uint16_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec16le(buf); buf += 2; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec32be(uint32_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec32be(buf); buf += 4; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec32le(uint32_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec32le(buf); buf += 4; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec64be(uint64_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec64be(buf); buf += 8; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_dec64le(uint64_t *v, size_t num, const void *src) { const unsigned char *buf; buf = (const unsigned char*)src; while (num -- > 0) { *v ++ = br_dec64le(buf); buf += 8; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc16be(void *dst, const uint16_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc16be(buf, *v ++); buf += 2; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc16le(void *dst, const uint16_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc16le(buf, *v ++); buf += 2; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc32be(void *dst, const uint32_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc32be(buf, *v ++); buf += 4; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc32le(void *dst, const uint32_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc32le(buf, *v ++); buf += 4; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc64be(void *dst, const uint64_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc64be(buf, *v ++); buf += 8; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_range_enc64le(void *dst, const uint64_t *v, size_t num) { unsigned char *buf; buf = (unsigned char*)dst; while (num -- > 0) { br_enc64le(buf, *v ++); buf += 8; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_codec_pemdec_ct0_context; static uint32_t _src_codec_pemdec_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_codec_pemdec_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char _src_codec_pemdec_ct0_datablock[]; */ void br_pem_decoder_init_main(void *t0ctx); void br_pem_decoder_run(void *t0ctx); #define _src_codec_pemdec_cCTX ((br_pem_decoder_context *)(void *)((unsigned char *)t0ctx - offsetof(br_pem_decoder_context, cpu))) /* see bearssl_pem.h */ void br_pem_decoder_init(br_pem_decoder_context *ctx) { memset(ctx, 0, sizeof *ctx); ctx->cpu.dp = &ctx->dp_stack[0]; ctx->cpu.rp = &ctx->rp_stack[0]; br_pem_decoder_init_main(&ctx->cpu); br_pem_decoder_run(&ctx->cpu); } /* see bearssl_pem.h */ size_t br_pem_decoder_push(br_pem_decoder_context *ctx, const void *data, size_t len) { if (ctx->event) { return 0; } ctx->hbuf = (const unsigned char*)data; ctx->hlen = len; br_pem_decoder_run(&ctx->cpu); return len - ctx->hlen; } /* see bearssl_pem.h */ int br_pem_decoder_event(br_pem_decoder_context *ctx) { int event; event = ctx->event; ctx->event = 0; return event; } static const unsigned char _src_codec_pemdec_ct0_datablock[] = { 0x00, 0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x42, 0x45, 0x47, 0x49, 0x4E, 0x20, 0x00, 0x2D, 0x2D, 0x2D, 0x2D, 0x45, 0x4E, 0x44, 0x20, 0x00 }; static const unsigned char _src_codec_pemdec_ct0_codeblock[] = { 0x00, 0x01, 0x00, 0x09, 0x00, 0x00, 0x01, 0x01, 0x07, 0x00, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x13, 0x13, 0x00, 0x00, 0x01, T0_INT2(offsetof(br_pem_decoder_context, event)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_pem_decoder_context, name)), 0x00, 0x00, 0x05, 0x14, 0x2C, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x03, 0x13, 0x04, 0x76, 0x01, 0x2D, 0x0C, 0x06, 0x05, 0x2E, 0x01, 0x03, 0x2D, 0x00, 0x01, 0x0D, 0x27, 0x05, 0x04, 0x01, 0x03, 0x2D, 0x00, 0x15, 0x2E, 0x01, 0x02, 0x2D, 0x00, 0x01, 0x01, 0x7F, 0x03, 0x00, 0x25, 0x01, 0x00, 0x18, 0x0D, 0x06, 0x03, 0x13, 0x04, 0x3C, 0x01, 0x7F, 0x18, 0x0D, 0x06, 0x13, 0x13, 0x02, 0x00, 0x05, 0x06, 0x2E, 0x01, 0x03, 0x2D, 0x04, 0x03, 0x01, 0x7F, 0x23, 0x01, 0x00, 0x00, 0x04, 0x23, 0x01, 0x01, 0x18, 0x0D, 0x06, 0x09, 0x13, 0x01, 0x00, 0x23, 0x01, 0x00, 0x00, 0x04, 0x14, 0x01, 0x02, 0x18, 0x0D, 0x06, 0x06, 0x13, 0x01, 0x7F, 0x00, 0x04, 0x08, 0x13, 0x01, 0x03, 0x2D, 0x01, 0x00, 0x00, 0x13, 0x01, 0x00, 0x03, 0x00, 0x04, 0xFF, 0x33, 0x01, 0x2C, 0x14, 0x01, 0x2D, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x7F, 0x00, 0x14, 0x31, 0x06, 0x02, 0x13, 0x29, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x02, 0x00, 0x16, 0x14, 0x1D, 0x06, 0x05, 0x13, 0x2E, 0x01, 0x03, 0x00, 0x03, 0x00, 0x29, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x03, 0x00, 0x16, 0x14, 0x1D, 0x06, 0x05, 0x13, 0x2E, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x06, 0x0A, 0x07, 0x03, 0x00, 0x29, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x03, 0x00, 0x14, 0x01, 0x3D, 0x0D, 0x06, 0x2E, 0x13, 0x29, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x03, 0x00, 0x2F, 0x05, 0x04, 0x13, 0x01, 0x03, 0x00, 0x01, 0x3D, 0x0C, 0x06, 0x03, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x0F, 0x10, 0x06, 0x03, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x04, 0x0F, 0x1C, 0x01, 0x01, 0x00, 0x16, 0x14, 0x1D, 0x06, 0x05, 0x13, 0x2E, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x06, 0x0A, 0x07, 0x03, 0x00, 0x29, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x04, 0x13, 0x01, 0x03, 0x00, 0x14, 0x01, 0x3D, 0x0D, 0x06, 0x20, 0x13, 0x2F, 0x05, 0x03, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x03, 0x10, 0x06, 0x03, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x0A, 0x0F, 0x1C, 0x02, 0x00, 0x01, 0x02, 0x0F, 0x1C, 0x01, 0x01, 0x00, 0x16, 0x14, 0x1D, 0x06, 0x05, 0x13, 0x2E, 0x01, 0x03, 0x00, 0x02, 0x00, 0x01, 0x06, 0x0A, 0x07, 0x03, 0x00, 0x02, 0x00, 0x01, 0x10, 0x0F, 0x1C, 0x02, 0x00, 0x01, 0x08, 0x0F, 0x1C, 0x02, 0x00, 0x1C, 0x01, 0x00, 0x00, 0x00, 0x28, 0x01, 0x01, 0x2D, 0x24, 0x06, 0x02, 0x04, 0x7B, 0x04, 0x75, 0x00, 0x14, 0x12, 0x2A, 0x14, 0x05, 0x04, 0x20, 0x01, 0x7F, 0x00, 0x2C, 0x2A, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x05, 0x13, 0x20, 0x01, 0x00, 0x00, 0x0D, 0x05, 0x05, 0x13, 0x2E, 0x01, 0x00, 0x00, 0x1E, 0x04, 0x5E, 0x00, 0x01, 0x01, 0x27, 0x06, 0x0B, 0x22, 0x01, 0x80, 0x7F, 0x2B, 0x14, 0x06, 0x02, 0x30, 0x00, 0x13, 0x04, 0x6E, 0x00, 0x2C, 0x14, 0x31, 0x05, 0x01, 0x00, 0x13, 0x04, 0x77, 0x00, 0x14, 0x14, 0x01, 0x80, 0x61, 0x0E, 0x1B, 0x01, 0x80, 0x7A, 0x0B, 0x10, 0x06, 0x03, 0x01, 0x20, 0x08, 0x00, 0x01, 0x14, 0x03, 0x00, 0x1B, 0x18, 0x05, 0x05, 0x20, 0x2E, 0x01, 0x00, 0x00, 0x2C, 0x14, 0x01, 0x0A, 0x0D, 0x06, 0x06, 0x20, 0x02, 0x00, 0x1B, 0x08, 0x00, 0x14, 0x01, 0x0D, 0x0D, 0x06, 0x03, 0x13, 0x04, 0x03, 0x2A, 0x18, 0x1A, 0x1E, 0x1B, 0x1F, 0x1B, 0x04, 0x59, 0x00, 0x19, 0x14, 0x1D, 0x05, 0x01, 0x00, 0x13, 0x11, 0x04, 0x76, 0x00, 0x21, 0x1A, 0x11, 0x00, 0x00, 0x2C, 0x01, 0x0A, 0x0C, 0x06, 0x02, 0x04, 0x78, 0x00, 0x01, 0x01, 0x7F, 0x03, 0x00, 0x2C, 0x14, 0x01, 0x0A, 0x0C, 0x06, 0x09, 0x31, 0x05, 0x04, 0x01, 0x00, 0x03, 0x00, 0x04, 0x70, 0x13, 0x02, 0x00, 0x00, 0x00, 0x14, 0x06, 0x14, 0x1F, 0x14, 0x22, 0x07, 0x17, 0x01, 0x2D, 0x0C, 0x06, 0x08, 0x22, 0x07, 0x1E, 0x01, 0x00, 0x1B, 0x1A, 0x00, 0x04, 0x69, 0x22, 0x1A, 0x00, 0x00, 0x14, 0x01, 0x0A, 0x0C, 0x1B, 0x01, 0x20, 0x0B, 0x10, 0x00 }; static const uint16_t _src_codec_pemdec_ct0_caddr[] = { 0, 5, 10, 15, 19, 24, 29, 67, 149, 384, 396, 431, 450, 460, 479, 523, 534, 539, 549, 574, 601 }; #define _src_codec_pemdec_cT0_INTERPRETED 29 #define _src_codec_pemdec_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &_src_codec_pemdec_ct0_codeblock[_src_codec_pemdec_ct0_caddr[(slot) - _src_codec_pemdec_cT0_INTERPRETED]]; \ t0_lnum = _src_codec_pemdec_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &_src_codec_pemdec_ct0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define _src_codec_pemdec_cT0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_codec_pemdec_ct0_context *t0ctx =(_src_codec_pemdec_ct0_context*)ctx; \ t0ctx->ip = &_src_codec_pemdec_ct0_codeblock[0]; \ _src_codec_pemdec_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } _src_codec_pemdec_cT0_DEFENTRY(br_pem_decoder_init_main, 38) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_pem_decoder_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_codec_pemdec_ct0_context *)t0ctx)->dp; rp = ((_src_codec_pemdec_ct0_context *)t0ctx)->rp; ip = ((_src_codec_pemdec_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_codec_pemdec_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &_src_codec_pemdec_ct0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_codec_pemdec_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_codec_pemdec_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_codec_pemdec_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_codec_pemdec_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_codec_pemdec_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_codec_pemdec_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 8: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 9: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 10: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 11: { /* <= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a <= b)); } break; case 12: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 13: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 14: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 15: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 16: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 17: { /* co */ T0_CO(); } break; case 18: { /* data-get8 */ size_t addr = T0_POP(); T0_PUSH(_src_codec_pemdec_ct0_datablock[addr]); } break; case 19: { /* drop */ (void)T0_POP(); } break; case 20: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 21: { /* flush-buf */ if (_src_codec_pemdec_cCTX->ptr > 0) { if (_src_codec_pemdec_cCTX->dest) { _src_codec_pemdec_cCTX->dest(_src_codec_pemdec_cCTX->dest_ctx, _src_codec_pemdec_cCTX->buf, _src_codec_pemdec_cCTX->ptr); } _src_codec_pemdec_cCTX->ptr = 0; } } break; case 22: { /* from-base64 */ uint32_t c = T0_POP(); uint32_t p, q, r, z; p = c - 0x41; q = c - 0x61; r = c - 0x30; z = ((p + 2) & -LT(p, 26)) | ((q + 28) & -LT(q, 26)) | ((r + 54) & -LT(r, 10)) | (64 & -EQ(c, 0x2B)) | (65 & -EQ(c, 0x2F)) | EQ(c, 0x3D); T0_PUSHi((int32_t)z - 2); } break; case 23: { /* get8 */ size_t addr = T0_POP(); T0_PUSH(*((unsigned char *)_src_codec_pemdec_cCTX + addr)); } break; case 24: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 25: { /* read8-native */ if (_src_codec_pemdec_cCTX->hlen > 0) { T0_PUSH(*_src_codec_pemdec_cCTX->hbuf ++); _src_codec_pemdec_cCTX->hlen --; } else { T0_PUSHi(-1); } } break; case 26: { /* set8 */ size_t addr = T0_POP(); unsigned x = T0_POP(); *((unsigned char *)_src_codec_pemdec_cCTX + addr) = x; } break; case 27: { /* swap */ T0_SWAP(); } break; case 28: { /* write8 */ unsigned char x = (unsigned char)T0_POP(); _src_codec_pemdec_cCTX->buf[_src_codec_pemdec_cCTX->ptr ++] = x; if (_src_codec_pemdec_cCTX->ptr == sizeof _src_codec_pemdec_cCTX->buf) { if (_src_codec_pemdec_cCTX->dest) { _src_codec_pemdec_cCTX->dest(_src_codec_pemdec_cCTX->dest_ctx, _src_codec_pemdec_cCTX->buf, sizeof _src_codec_pemdec_cCTX->buf); } _src_codec_pemdec_cCTX->ptr = 0; } } break; } } else { _src_codec_pemdec_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_codec_pemdec_ct0_context *)t0ctx)->dp = dp; ((_src_codec_pemdec_ct0_context *)t0ctx)->rp = rp; ((_src_codec_pemdec_ct0_context *)t0ctx)->ip = ip; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Get the appropriate Base64 character for a numeric value in the * 0..63 range. This is constant-time. */ static char b64char(uint32_t x) { /* * Values 0 to 25 map to 0x41..0x5A ('A' to 'Z') * Values 26 to 51 map to 0x61..0x7A ('a' to 'z') * Values 52 to 61 map to 0x30..0x39 ('0' to '9') * Value 62 maps to 0x2B ('+') * Value 63 maps to 0x2F ('/') */ uint32_t a, b, c; a = x - 26; b = x - 52; c = x - 62; /* * Looking at bits 8..15 of values a, b and c: * * x a b c * --------------------- * 0..25 FF FF FF * 26..51 00 FF FF * 52..61 00 00 FF * 62..63 00 00 00 */ return (char)(((x + 0x41) & ((a & b & c) >> 8)) | ((x + (0x61 - 26)) & ((~a & b & c) >> 8)) | ((x - (52 - 0x30)) & ((~a & ~b & c) >> 8)) | ((0x2B + ((x & 1) << 2)) & (~(a | b | c) >> 8))); } /* see bearssl_pem.h */ size_t br_pem_encode(void *dest, const void *data, size_t len, const char *banner, unsigned flags) { size_t dlen, banner_len, lines; char *d; unsigned char *buf; size_t u; int off, lim; banner_len = strlen(banner); /* FIXME: try to avoid divisions here, as they may pull an extra libc function. */ if ((flags & BR_PEM_LINE64) != 0) { lines = (len + 47) / 48; } else { lines = (len + 56) / 57; } dlen = (banner_len << 1) + 30 + (((len + 2) / 3) << 2) + lines + 2; if ((flags & BR_PEM_CRLF) != 0) { dlen += lines + 2; } if (dest == NULL) { return dlen; } d = (char*)dest; /* * We always move the source data to the end of output buffer; * the encoding process never "catches up" except at the very * end. This also handles all conditions of partial or total * overlap. */ buf = (unsigned char *)d + dlen - len; memmove(buf, data, len); memcpy(d, "-----BEGIN ", 11); d += 11; memcpy(d, banner, banner_len); d += banner_len; memcpy(d, "-----", 5); d += 5; if ((flags & BR_PEM_CRLF) != 0) { *d ++ = 0x0D; } *d ++ = 0x0A; off = 0; lim = (flags & BR_PEM_LINE64) != 0 ? 16 : 19; for (u = 0; (u + 2) < len; u += 3) { uint32_t w; w = ((uint32_t)buf[u] << 16) | ((uint32_t)buf[u + 1] << 8) | (uint32_t)buf[u + 2]; *d ++ = b64char(w >> 18); *d ++ = b64char((w >> 12) & 0x3F); *d ++ = b64char((w >> 6) & 0x3F); *d ++ = b64char(w & 0x3F); if (++ off == lim) { off = 0; if ((flags & BR_PEM_CRLF) != 0) { *d ++ = 0x0D; } *d ++ = 0x0A; } } if (u < len) { uint32_t w; w = (uint32_t)buf[u] << 16; if (u + 1 < len) { w |= (uint32_t)buf[u + 1] << 8; } *d ++ = b64char(w >> 18); *d ++ = b64char((w >> 12) & 0x3F); if (u + 1 < len) { *d ++ = b64char((w >> 6) & 0x3F); } else { *d ++ = 0x3D; } *d ++ = 0x3D; off ++; } if (off != 0) { if ((flags & BR_PEM_CRLF) != 0) { *d ++ = 0x0D; } *d ++ = 0x0A; } memcpy(d, "-----END ", 9); d += 9; memcpy(d, banner, banner_len); d += banner_len; memcpy(d, "-----", 5); d += 5; if ((flags & BR_PEM_CRLF) != 0) { *d ++ = 0x0D; } *d ++ = 0x0A; /* Final zero, not counted in returned length. */ *d ++ = 0x00; return dlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char * _src_ec_ec_all_m15_capi_generator(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.generator(curve, len); case BR_EC_curve25519: return br_ec_c25519_m15.generator(curve, len); default: return br_ec_prime_i15.generator(curve, len); } } static const unsigned char * _src_ec_ec_all_m15_capi_order(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.order(curve, len); case BR_EC_curve25519: return br_ec_c25519_m15.order(curve, len); default: return br_ec_prime_i15.order(curve, len); } } static size_t _src_ec_ec_all_m15_capi_xoff(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.xoff(curve, len); case BR_EC_curve25519: return br_ec_c25519_m15.xoff(curve, len); default: return br_ec_prime_i15.xoff(curve, len); } } static uint32_t _src_ec_ec_all_m15_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.mul(G, Glen, kb, kblen, curve); case BR_EC_curve25519: return br_ec_c25519_m15.mul(G, Glen, kb, kblen, curve); default: return br_ec_prime_i15.mul(G, Glen, kb, kblen, curve); } } static size_t _src_ec_ec_all_m15_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.mulgen(R, x, xlen, curve); case BR_EC_curve25519: return br_ec_c25519_m15.mulgen(R, x, xlen, curve); default: return br_ec_prime_i15.mulgen(R, x, xlen, curve); } } static uint32_t _src_ec_ec_all_m15_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { switch (curve) { case BR_EC_secp256r1: return br_ec_p256_m15.muladd(A, B, len, x, xlen, y, ylen, curve); case BR_EC_curve25519: return br_ec_c25519_m15.muladd(A, B, len, x, xlen, y, ylen, curve); default: return br_ec_prime_i15.muladd(A, B, len, x, xlen, y, ylen, curve); } } /* see bearssl_ec.h */ const br_ec_impl br_ec_all_m15 = { (uint32_t)0x23800000, &_src_ec_ec_all_m15_capi_generator, &_src_ec_ec_all_m15_capi_order, &_src_ec_ec_all_m15_capi_xoff, &_src_ec_ec_all_m15_capi_mul, &_src_ec_ec_all_m15_capi_mulgen, &_src_ec_ec_all_m15_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char * _src_ec_ec_all_m31_capi_generator(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.generator(curve, len); #else return br_ec_p256_m31.generator(curve, len); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.generator(curve, len); #else return br_ec_c25519_m31.generator(curve, len); #endif default: return br_ec_prime_i31.generator(curve, len); } } static const unsigned char * _src_ec_ec_all_m31_capi_order(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.order(curve, len); #else return br_ec_p256_m31.order(curve, len); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.order(curve, len); #else return br_ec_c25519_m31.order(curve, len); #endif default: return br_ec_prime_i31.order(curve, len); } } static size_t _src_ec_ec_all_m31_capi_xoff(int curve, size_t *len) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.xoff(curve, len); #else return br_ec_p256_m31.xoff(curve, len); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.xoff(curve, len); #else return br_ec_c25519_m31.xoff(curve, len); #endif default: return br_ec_prime_i31.xoff(curve, len); } } static uint32_t _src_ec_ec_all_m31_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.mul(G, Glen, kb, kblen, curve); #else return br_ec_p256_m31.mul(G, Glen, kb, kblen, curve); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.mul(G, Glen, kb, kblen, curve); #else return br_ec_c25519_m31.mul(G, Glen, kb, kblen, curve); #endif default: return br_ec_prime_i31.mul(G, Glen, kb, kblen, curve); } } static size_t _src_ec_ec_all_m31_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.mulgen(R, x, xlen, curve); #else return br_ec_p256_m31.mulgen(R, x, xlen, curve); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.mulgen(R, x, xlen, curve); #else return br_ec_c25519_m31.mulgen(R, x, xlen, curve); #endif default: return br_ec_prime_i31.mulgen(R, x, xlen, curve); } } static uint32_t _src_ec_ec_all_m31_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { switch (curve) { case BR_EC_secp256r1: #if BR_INT128 || BR_UMUL128 return br_ec_p256_m64.muladd(A, B, len, x, xlen, y, ylen, curve); #else return br_ec_p256_m31.muladd(A, B, len, x, xlen, y, ylen, curve); #endif case BR_EC_curve25519: #if BR_INT128 || BR_UMUL128 return br_ec_c25519_m64.muladd(A, B, len, x, xlen, y, ylen, curve); #else return br_ec_c25519_m31.muladd(A, B, len, x, xlen, y, ylen, curve); #endif default: return br_ec_prime_i31.muladd(A, B, len, x, xlen, y, ylen, curve); } } /* see bearssl_ec.h */ const br_ec_impl br_ec_all_m31 = { (uint32_t)0x23800000, &_src_ec_ec_all_m31_capi_generator, &_src_ec_ec_all_m31_capi_order, &_src_ec_ec_all_m31_capi_xoff, &_src_ec_ec_all_m31_capi_mul, &_src_ec_ec_all_m31_capi_mulgen, &_src_ec_ec_all_m31_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Parameters for the field: * - field modulus p = 2^255-19 * - R^2 mod p (R = 2^(15k) for the smallest k such that R >= p) */ static const uint16_t _src_ec_ec_c25519_i15_cC255_P[] = { 0x0110, 0x7FED, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF }; #define _src_ec_ec_c25519_i15_cP0I 0x4A1B static const uint16_t _src_ec_ec_c25519_i15_cC255_R2[] = { 0x0110, 0x0169, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; /* obsolete #include #include static void print_int_mont(const char *name, const uint16_t *x) { uint16_t y[18]; unsigned char tmp[32]; size_t u; printf("%s = ", name); memcpy(y, x, sizeof y); br_i15_from_monty(y, _src_ec_ec_c25519_i15_cC255_P, _src_ec_ec_c25519_i15_cP0I); br_i15_encode(tmp, sizeof tmp, y); for (u = 0; u < sizeof tmp; u ++) { printf("%02X", tmp[u]); } printf("\n"); } */ static const uint16_t _src_ec_ec_c25519_i15_cC255_A24[] = { 0x0110, 0x45D3, 0x0046, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; static const unsigned char _src_ec_ec_c25519_i15_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_i15_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_i15_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_i15_cGEN; } static const unsigned char * _src_ec_ec_c25519_i15_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_i15_cORDER; } static size_t _src_ec_ec_c25519_i15_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } static void _src_ec_ec_c25519_i15_ccswap(uint16_t *a, uint16_t *b, uint32_t ctl) { int i; ctl = -ctl; for (i = 0; i < 18; i ++) { uint32_t aw, bw, tw; aw = a[i]; bw = b[i]; tw = ctl & (aw ^ bw); a[i] = aw ^ tw; b[i] = bw ^ tw; } } static void _src_ec_ec_c25519_i15_cc255_add(uint16_t *d, const uint16_t *a, const uint16_t *b) { uint32_t ctl; uint16_t t[18]; memcpy(t, a, sizeof t); ctl = br_i15_add(t, b, 1); ctl |= NOT(br_i15_sub(t, _src_ec_ec_c25519_i15_cC255_P, 0)); br_i15_sub(t, _src_ec_ec_c25519_i15_cC255_P, ctl); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i15_cc255_sub(uint16_t *d, const uint16_t *a, const uint16_t *b) { uint16_t t[18]; memcpy(t, a, sizeof t); br_i15_add(t, _src_ec_ec_c25519_i15_cC255_P, br_i15_sub(t, b, 1)); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i15_cc255_mul(uint16_t *d, const uint16_t *a, const uint16_t *b) { uint16_t t[18]; br_i15_montymul(t, a, b, _src_ec_ec_c25519_i15_cC255_P, _src_ec_ec_c25519_i15_cP0I); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i15_cbyteswap(unsigned char *G) { int i; for (i = 0; i < 16; i ++) { unsigned char t; t = G[i]; G[i] = G[31 - i]; G[31 - i] = t; } } static uint32_t _src_ec_ec_c25519_i15_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { #define ILEN (18 * sizeof(uint16_t)) /* * The a[] and b[] arrays have an extra word to allow for * decoding without using br_i15_decode_reduce(). */ uint16_t x1[18], x2[18], x3[18], z2[18], z3[18]; uint16_t a[19], aa[18], b[19], bb[18]; uint16_t c[18], d[18], e[18], da[18], cb[18]; unsigned char k[32]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared. */ if (Glen != 32 || kblen > 32) { return 0; } G[31] &= 0x7F; /* * Byteswap the point encoding, because it uses little-endian, and * the generic decoding routine uses big-endian. */ _src_ec_ec_c25519_i15_cbyteswap(G); /* * Decode the point ('u' coordinate). This should be reduced * modulo p, but we prefer to avoid the dependency on * br_i15_decode_reduce(). Instead, we use br_i15_decode_mod() * with a synthetic modulus of value 2^255 (this must work * since G was truncated to 255 bits), then use a conditional * subtraction. We use br_i15_decode_mod() and not * br_i15_decode(), because the ec_prime_i15 implementation uses * the former but not the latter. * br_i15_decode_reduce(a, G, 32, _src_ec_ec_c25519_i15_cC255_P); */ br_i15_zero(b, 0x111); b[18] = 1; br_i15_decode_mod(a, G, 32, b); a[0] = 0x110; br_i15_sub(a, _src_ec_ec_c25519_i15_cC255_P, NOT(br_i15_sub(a, _src_ec_ec_c25519_i15_cC255_P, 0))); /* * Initialise variables x1, x2, z2, x3 and z3. We set all of them * into Montgomery representation. */ br_i15_montymul(x1, a, _src_ec_ec_c25519_i15_cC255_R2, _src_ec_ec_c25519_i15_cC255_P, _src_ec_ec_c25519_i15_cP0I); memcpy(x3, x1, ILEN); br_i15_zero(z2, _src_ec_ec_c25519_i15_cC255_P[0]); memcpy(x2, z2, ILEN); x2[1] = 19; memcpy(z3, x2, ILEN); memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; /* obsolete print_int_mont("x1", x1); */ swap = 0; for (i = 254; i >= 0; i --) { uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_i15_ccswap(x2, x3, swap); _src_ec_ec_c25519_i15_ccswap(z2, z3, swap); swap = kt; /* obsolete print_int_mont("x2", x2); print_int_mont("z2", z2); print_int_mont("x3", x3); print_int_mont("z3", z3); */ _src_ec_ec_c25519_i15_cc255_add(a, x2, z2); _src_ec_ec_c25519_i15_cc255_mul(aa, a, a); _src_ec_ec_c25519_i15_cc255_sub(b, x2, z2); _src_ec_ec_c25519_i15_cc255_mul(bb, b, b); _src_ec_ec_c25519_i15_cc255_sub(e, aa, bb); _src_ec_ec_c25519_i15_cc255_add(c, x3, z3); _src_ec_ec_c25519_i15_cc255_sub(d, x3, z3); _src_ec_ec_c25519_i15_cc255_mul(da, d, a); _src_ec_ec_c25519_i15_cc255_mul(cb, c, b); /* obsolete print_int_mont("a ", a); print_int_mont("aa", aa); print_int_mont("b ", b); print_int_mont("bb", bb); print_int_mont("e ", e); print_int_mont("c ", c); print_int_mont("d ", d); print_int_mont("da", da); print_int_mont("cb", cb); */ _src_ec_ec_c25519_i15_cc255_add(x3, da, cb); _src_ec_ec_c25519_i15_cc255_mul(x3, x3, x3); _src_ec_ec_c25519_i15_cc255_sub(z3, da, cb); _src_ec_ec_c25519_i15_cc255_mul(z3, z3, z3); _src_ec_ec_c25519_i15_cc255_mul(z3, z3, x1); _src_ec_ec_c25519_i15_cc255_mul(x2, aa, bb); _src_ec_ec_c25519_i15_cc255_mul(z2, _src_ec_ec_c25519_i15_cC255_A24, e); _src_ec_ec_c25519_i15_cc255_add(z2, z2, aa); _src_ec_ec_c25519_i15_cc255_mul(z2, e, z2); /* obsolete print_int_mont("x2", x2); print_int_mont("z2", z2); print_int_mont("x3", x3); print_int_mont("z3", z3); */ } _src_ec_ec_c25519_i15_ccswap(x2, x3, swap); _src_ec_ec_c25519_i15_ccswap(z2, z3, swap); /* * Inverse z2 with a modular exponentiation. This is a simple * square-and-multiply algorithm; we mutualise most non-squarings * since the exponent contains almost only ones. */ memcpy(a, z2, ILEN); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_i15_cc255_mul(a, a, a); _src_ec_ec_c25519_i15_cc255_mul(a, a, z2); } memcpy(b, a, ILEN); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_i15_cc255_mul(b, b, b); } _src_ec_ec_c25519_i15_cc255_mul(b, b, a); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_i15_cc255_mul(b, b, b); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_i15_cc255_mul(b, z2, b); } } _src_ec_ec_c25519_i15_cc255_mul(b, x2, b); /* * To avoid a dependency on br_i15_from_monty(), we use a * Montgomery multiplication with 1. * memcpy(x2, b, ILEN); * br_i15_from_monty(x2, _src_ec_ec_c25519_i15_cC255_P, _src_ec_ec_c25519_i15_cP0I); */ br_i15_zero(a, _src_ec_ec_c25519_i15_cC255_P[0]); a[1] = 1; br_i15_montymul(x2, a, b, _src_ec_ec_c25519_i15_cC255_P, _src_ec_ec_c25519_i15_cP0I); br_i15_encode(G, 32, x2); _src_ec_ec_c25519_i15_cbyteswap(G); return 1; #undef ILEN } static size_t _src_ec_ec_c25519_i15_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_i15_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_i15_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_i15_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_i15 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_i15_capi_generator, &_src_ec_ec_c25519_i15_capi_order, &_src_ec_ec_c25519_i15_capi_xoff, &_src_ec_ec_c25519_i15_capi_mul, &_src_ec_ec_c25519_i15_capi_mulgen, &_src_ec_ec_c25519_i15_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Parameters for the field: * - field modulus p = 2^255-19 * - R^2 mod p (R = 2^(31k) for the smallest k such that R >= p) */ static const uint32_t _src_ec_ec_c25519_i31_cC255_P[] = { 0x00000107, 0x7FFFFFED, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x0000007F }; #define _src_ec_ec_c25519_i31_cP0I 0x286BCA1B static const uint32_t _src_ec_ec_c25519_i31_cC255_R2[] = { 0x00000107, 0x00000000, 0x02D20000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }; static const uint32_t _src_ec_ec_c25519_i31_cC255_A24[] = { 0x00000107, 0x53000000, 0x0000468B, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }; /* obsolete #include #include static void print_int_mont(const char *name, const uint32_t *x) { uint32_t y[10]; unsigned char tmp[32]; size_t u; printf("%s = ", name); memcpy(y, x, sizeof y); br_i31_from_monty(y, _src_ec_ec_c25519_i31_cC255_P, _src_ec_ec_c25519_i31_cP0I); br_i31_encode(tmp, sizeof tmp, y); for (u = 0; u < sizeof tmp; u ++) { printf("%02X", tmp[u]); } printf("\n"); } */ static const unsigned char _src_ec_ec_c25519_i31_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_i31_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_i31_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_i31_cGEN; } static const unsigned char * _src_ec_ec_c25519_i31_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_i31_cORDER; } static size_t _src_ec_ec_c25519_i31_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } static void _src_ec_ec_c25519_i31_ccswap(uint32_t *a, uint32_t *b, uint32_t ctl) { int i; ctl = -ctl; for (i = 0; i < 10; i ++) { uint32_t aw, bw, tw; aw = a[i]; bw = b[i]; tw = ctl & (aw ^ bw); a[i] = aw ^ tw; b[i] = bw ^ tw; } } static void _src_ec_ec_c25519_i31_cc255_add(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t ctl; uint32_t t[10]; memcpy(t, a, sizeof t); ctl = br_i31_add(t, b, 1); ctl |= NOT(br_i31_sub(t, _src_ec_ec_c25519_i31_cC255_P, 0)); br_i31_sub(t, _src_ec_ec_c25519_i31_cC255_P, ctl); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i31_cc255_sub(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[10]; memcpy(t, a, sizeof t); br_i31_add(t, _src_ec_ec_c25519_i31_cC255_P, br_i31_sub(t, b, 1)); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i31_cc255_mul(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[10]; br_i31_montymul(t, a, b, _src_ec_ec_c25519_i31_cC255_P, _src_ec_ec_c25519_i31_cP0I); memcpy(d, t, sizeof t); } static void _src_ec_ec_c25519_i31_cbyteswap(unsigned char *G) { int i; for (i = 0; i < 16; i ++) { unsigned char t; t = G[i]; G[i] = G[31 - i]; G[31 - i] = t; } } static uint32_t _src_ec_ec_c25519_i31_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { uint32_t x1[10], x2[10], x3[10], z2[10], z3[10]; uint32_t a[10], aa[10], b[10], bb[10]; uint32_t c[10], d[10], e[10], da[10], cb[10]; unsigned char k[32]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared. */ if (Glen != 32 || kblen > 32) { return 0; } G[31] &= 0x7F; /* * Byteswap the point encoding, because it uses little-endian, and * the generic decoding routine uses big-endian. */ _src_ec_ec_c25519_i31_cbyteswap(G); /* * Decode the point ('u' coordinate). This should be reduced * modulo p, but we prefer to avoid the dependency on * br_i31_decode_reduce(). Instead, we use br_i31_decode_mod() * with a synthetic modulus of value 2^255 (this must work * since G was truncated to 255 bits), then use a conditional * subtraction. We use br_i31_decode_mod() and not * br_i31_decode(), because the ec_prime_i31 implementation uses * the former but not the latter. * br_i31_decode_reduce(a, G, 32, _src_ec_ec_c25519_i31_cC255_P); */ br_i31_zero(b, 0x108); b[9] = 0x0080; br_i31_decode_mod(a, G, 32, b); a[0] = 0x107; br_i31_sub(a, _src_ec_ec_c25519_i31_cC255_P, NOT(br_i31_sub(a, _src_ec_ec_c25519_i31_cC255_P, 0))); /* * Initialise variables x1, x2, z2, x3 and z3. We set all of them * into Montgomery representation. */ br_i31_montymul(x1, a, _src_ec_ec_c25519_i31_cC255_R2, _src_ec_ec_c25519_i31_cC255_P, _src_ec_ec_c25519_i31_cP0I); memcpy(x3, x1, sizeof x1); br_i31_zero(z2, _src_ec_ec_c25519_i31_cC255_P[0]); memcpy(x2, z2, sizeof z2); x2[1] = 0x13000000; memcpy(z3, x2, sizeof x2); /* * kb[] is in big-endian notation, but possibly shorter than k[]. */ memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; /* obsolete print_int_mont("x1", x1); */ swap = 0; for (i = 254; i >= 0; i --) { uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_i31_ccswap(x2, x3, swap); _src_ec_ec_c25519_i31_ccswap(z2, z3, swap); swap = kt; /* obsolete print_int_mont("x2", x2); print_int_mont("z2", z2); print_int_mont("x3", x3); print_int_mont("z3", z3); */ _src_ec_ec_c25519_i31_cc255_add(a, x2, z2); _src_ec_ec_c25519_i31_cc255_mul(aa, a, a); _src_ec_ec_c25519_i31_cc255_sub(b, x2, z2); _src_ec_ec_c25519_i31_cc255_mul(bb, b, b); _src_ec_ec_c25519_i31_cc255_sub(e, aa, bb); _src_ec_ec_c25519_i31_cc255_add(c, x3, z3); _src_ec_ec_c25519_i31_cc255_sub(d, x3, z3); _src_ec_ec_c25519_i31_cc255_mul(da, d, a); _src_ec_ec_c25519_i31_cc255_mul(cb, c, b); /* obsolete print_int_mont("a ", a); print_int_mont("aa", aa); print_int_mont("b ", b); print_int_mont("bb", bb); print_int_mont("e ", e); print_int_mont("c ", c); print_int_mont("d ", d); print_int_mont("da", da); print_int_mont("cb", cb); */ _src_ec_ec_c25519_i31_cc255_add(x3, da, cb); _src_ec_ec_c25519_i31_cc255_mul(x3, x3, x3); _src_ec_ec_c25519_i31_cc255_sub(z3, da, cb); _src_ec_ec_c25519_i31_cc255_mul(z3, z3, z3); _src_ec_ec_c25519_i31_cc255_mul(z3, z3, x1); _src_ec_ec_c25519_i31_cc255_mul(x2, aa, bb); _src_ec_ec_c25519_i31_cc255_mul(z2, _src_ec_ec_c25519_i31_cC255_A24, e); _src_ec_ec_c25519_i31_cc255_add(z2, z2, aa); _src_ec_ec_c25519_i31_cc255_mul(z2, e, z2); /* obsolete print_int_mont("x2", x2); print_int_mont("z2", z2); print_int_mont("x3", x3); print_int_mont("z3", z3); */ } _src_ec_ec_c25519_i31_ccswap(x2, x3, swap); _src_ec_ec_c25519_i31_ccswap(z2, z3, swap); /* * Inverse z2 with a modular exponentiation. This is a simple * square-and-multiply algorithm; we mutualise most non-squarings * since the exponent contains almost only ones. */ memcpy(a, z2, sizeof z2); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_i31_cc255_mul(a, a, a); _src_ec_ec_c25519_i31_cc255_mul(a, a, z2); } memcpy(b, a, sizeof a); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_i31_cc255_mul(b, b, b); } _src_ec_ec_c25519_i31_cc255_mul(b, b, a); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_i31_cc255_mul(b, b, b); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_i31_cc255_mul(b, z2, b); } } _src_ec_ec_c25519_i31_cc255_mul(b, x2, b); /* * To avoid a dependency on br_i31_from_monty(), we use * a Montgomery multiplication with 1. * memcpy(x2, b, sizeof b); * br_i31_from_monty(x2, _src_ec_ec_c25519_i31_cC255_P, _src_ec_ec_c25519_i31_cP0I); */ br_i31_zero(a, _src_ec_ec_c25519_i31_cC255_P[0]); a[1] = 1; br_i31_montymul(x2, a, b, _src_ec_ec_c25519_i31_cC255_P, _src_ec_ec_c25519_i31_cP0I); br_i31_encode(G, 32, x2); _src_ec_ec_c25519_i31_cbyteswap(G); return 1; } static size_t _src_ec_ec_c25519_i31_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_i31_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_i31_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_i31_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_i31 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_i31_capi_generator, &_src_ec_ec_c25519_i31_capi_order, &_src_ec_ec_c25519_i31_capi_xoff, &_src_ec_ec_c25519_i31_capi_mul, &_src_ec_ec_c25519_i31_capi_mulgen, &_src_ec_ec_c25519_i31_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* obsolete #include #include static void print_int(const char *name, const uint32_t *x) { size_t u; unsigned char tmp[36]; printf("%s = ", name); for (u = 0; u < 20; u ++) { if (x[u] > 0x1FFF) { printf("INVALID:"); for (u = 0; u < 20; u ++) { printf(" %04X", x[u]); } printf("\n"); return; } } memset(tmp, 0, sizeof tmp); for (u = 0; u < 20; u ++) { uint32_t w; int j, k; w = x[u]; j = 13 * (int)u; k = j & 7; if (k != 0) { w <<= k; j -= k; } k = j >> 3; tmp[35 - k] |= (unsigned char)w; tmp[34 - k] |= (unsigned char)(w >> 8); tmp[33 - k] |= (unsigned char)(w >> 16); tmp[32 - k] |= (unsigned char)(w >> 24); } for (u = 4; u < 36; u ++) { printf("%02X", tmp[u]); } printf("\n"); } */ /* * If BR_NO_ARITH_SHIFT is undefined, or defined to 0, then we _assume_ * that right-shifting a signed negative integer copies the sign bit * (arithmetic right-shift). This is "implementation-defined behaviour", * i.e. it is not undefined, but it may differ between compilers. Each * compiler is supposed to document its behaviour in that respect. GCC * explicitly defines that an arithmetic right shift is used. We expect * all other compilers to do the same, because underlying CPU offer an * arithmetic right shift opcode that could not be used otherwise. */ #if BR_NO_ARITH_SHIFT #define ARSH(x, n) (((uint32_t)(x) >> (n)) \ | ((-((uint32_t)(x) >> 31)) << (32 - (n)))) #else #define ARSH(x, n) ((*(int32_t *)&(x)) >> (n)) #endif /* * Convert an integer from unsigned little-endian encoding to a sequence of * 13-bit words in little-endian order. The final "partial" word is * returned. */ static uint32_t le8_to_le13(uint32_t *dst, const unsigned char *src, size_t len) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { acc |= (uint32_t)(*src ++) << acc_len; acc_len += 8; if (acc_len >= 13) { *dst ++ = acc & 0x1FFF; acc >>= 13; acc_len -= 13; } } return acc; } /* * Convert an integer (13-bit words, little-endian) to unsigned * little-endian encoding. The total encoding length is provided; all * the destination bytes will be filled. */ static void le13_to_le8(unsigned char *dst, size_t len, const uint32_t *src) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { if (acc_len < 8) { acc |= (*src ++) << acc_len; acc_len += 13; } *dst ++ = (unsigned char)acc; acc >>= 8; acc_len -= 8; } } /* * Normalise an array of words to a strict 13 bits per word. Returned * value is the resulting carry. The source (w) and destination (d) * arrays may be identical, but shall not overlap partially. */ static inline uint32_t _src_ec_ec_c25519_m15_cnorm13(uint32_t *d, const uint32_t *w, size_t len) { size_t u; uint32_t cc; cc = 0; for (u = 0; u < len; u ++) { int32_t z; z = w[u] + cc; d[u] = z & 0x1FFF; cc = ARSH(z, 13); } return cc; } /* * _src_ec_ec_c25519_m15_cmul20() multiplies two 260-bit integers together. Each word must fit * on 13 bits; source operands use 20 words, destination operand * receives 40 words. All overlaps allowed. * * _src_ec_ec_c25519_m15_csquare20() computes the square of a 260-bit integer. Each word must * fit on 13 bits; source operand uses 20 words, destination operand * receives 40 words. All overlaps allowed. */ #if BR_SLOW_MUL15 static void _src_ec_ec_c25519_m15_cmul20(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * Two-level Karatsuba: turns a 20x20 multiplication into * nine 5x5 multiplications. We use 13-bit words but do not * propagate carries immediately, so words may expand: * * - First Karatsuba decomposition turns the 20x20 mul on * 13-bit words into three 10x10 muls, two on 13-bit words * and one on 14-bit words. * * - Second Karatsuba decomposition further splits these into: * * * four 5x5 muls on 13-bit words * * four 5x5 muls on 14-bit words * * one 5x5 mul on 15-bit words * * Highest word value is 8191, 16382 or 32764, for 13-bit, 14-bit * or 15-bit words, respectively. */ uint32_t u[45], v[45], w[90]; uint32_t cc; int i; #define ZADD(dw, d_off, s1w, s1_off, s2w, s2_off) do { \ (dw)[5 * (d_off) + 0] = (s1w)[5 * (s1_off) + 0] \ + (s2w)[5 * (s2_off) + 0]; \ (dw)[5 * (d_off) + 1] = (s1w)[5 * (s1_off) + 1] \ + (s2w)[5 * (s2_off) + 1]; \ (dw)[5 * (d_off) + 2] = (s1w)[5 * (s1_off) + 2] \ + (s2w)[5 * (s2_off) + 2]; \ (dw)[5 * (d_off) + 3] = (s1w)[5 * (s1_off) + 3] \ + (s2w)[5 * (s2_off) + 3]; \ (dw)[5 * (d_off) + 4] = (s1w)[5 * (s1_off) + 4] \ + (s2w)[5 * (s2_off) + 4]; \ } while (0) #define ZADDT(dw, d_off, sw, s_off) do { \ (dw)[5 * (d_off) + 0] += (sw)[5 * (s_off) + 0]; \ (dw)[5 * (d_off) + 1] += (sw)[5 * (s_off) + 1]; \ (dw)[5 * (d_off) + 2] += (sw)[5 * (s_off) + 2]; \ (dw)[5 * (d_off) + 3] += (sw)[5 * (s_off) + 3]; \ (dw)[5 * (d_off) + 4] += (sw)[5 * (s_off) + 4]; \ } while (0) #define ZSUB2F(dw, d_off, s1w, s1_off, s2w, s2_off) do { \ (dw)[5 * (d_off) + 0] -= (s1w)[5 * (s1_off) + 0] \ + (s2w)[5 * (s2_off) + 0]; \ (dw)[5 * (d_off) + 1] -= (s1w)[5 * (s1_off) + 1] \ + (s2w)[5 * (s2_off) + 1]; \ (dw)[5 * (d_off) + 2] -= (s1w)[5 * (s1_off) + 2] \ + (s2w)[5 * (s2_off) + 2]; \ (dw)[5 * (d_off) + 3] -= (s1w)[5 * (s1_off) + 3] \ + (s2w)[5 * (s2_off) + 3]; \ (dw)[5 * (d_off) + 4] -= (s1w)[5 * (s1_off) + 4] \ + (s2w)[5 * (s2_off) + 4]; \ } while (0) #define CPR1(w, cprcc) do { \ uint32_t cprz = (w) + cprcc; \ (w) = cprz & 0x1FFF; \ cprcc = cprz >> 13; \ } while (0) #define CPR(dw, d_off) do { \ uint32_t cprcc; \ cprcc = 0; \ CPR1((dw)[(d_off) + 0], cprcc); \ CPR1((dw)[(d_off) + 1], cprcc); \ CPR1((dw)[(d_off) + 2], cprcc); \ CPR1((dw)[(d_off) + 3], cprcc); \ CPR1((dw)[(d_off) + 4], cprcc); \ CPR1((dw)[(d_off) + 5], cprcc); \ CPR1((dw)[(d_off) + 6], cprcc); \ CPR1((dw)[(d_off) + 7], cprcc); \ CPR1((dw)[(d_off) + 8], cprcc); \ (dw)[(d_off) + 9] = cprcc; \ } while (0) memcpy(u, a, 20 * sizeof *a); ZADD(u, 4, a, 0, a, 1); ZADD(u, 5, a, 2, a, 3); ZADD(u, 6, a, 0, a, 2); ZADD(u, 7, a, 1, a, 3); ZADD(u, 8, u, 6, u, 7); memcpy(v, b, 20 * sizeof *b); ZADD(v, 4, b, 0, b, 1); ZADD(v, 5, b, 2, b, 3); ZADD(v, 6, b, 0, b, 2); ZADD(v, 7, b, 1, b, 3); ZADD(v, 8, v, 6, v, 7); /* * Do the eight first 8x8 muls. Source words are at most 16382 * each, so we can add product results together "as is" in 32-bit * words. */ for (i = 0; i < 40; i += 5) { w[(i << 1) + 0] = MUL15(u[i + 0], v[i + 0]); w[(i << 1) + 1] = MUL15(u[i + 0], v[i + 1]) + MUL15(u[i + 1], v[i + 0]); w[(i << 1) + 2] = MUL15(u[i + 0], v[i + 2]) + MUL15(u[i + 1], v[i + 1]) + MUL15(u[i + 2], v[i + 0]); w[(i << 1) + 3] = MUL15(u[i + 0], v[i + 3]) + MUL15(u[i + 1], v[i + 2]) + MUL15(u[i + 2], v[i + 1]) + MUL15(u[i + 3], v[i + 0]); w[(i << 1) + 4] = MUL15(u[i + 0], v[i + 4]) + MUL15(u[i + 1], v[i + 3]) + MUL15(u[i + 2], v[i + 2]) + MUL15(u[i + 3], v[i + 1]) + MUL15(u[i + 4], v[i + 0]); w[(i << 1) + 5] = MUL15(u[i + 1], v[i + 4]) + MUL15(u[i + 2], v[i + 3]) + MUL15(u[i + 3], v[i + 2]) + MUL15(u[i + 4], v[i + 1]); w[(i << 1) + 6] = MUL15(u[i + 2], v[i + 4]) + MUL15(u[i + 3], v[i + 3]) + MUL15(u[i + 4], v[i + 2]); w[(i << 1) + 7] = MUL15(u[i + 3], v[i + 4]) + MUL15(u[i + 4], v[i + 3]); w[(i << 1) + 8] = MUL15(u[i + 4], v[i + 4]); w[(i << 1) + 9] = 0; } /* * For the 9th multiplication, source words are up to 32764, * so we must do some carry propagation. If we add up to * 4 products and the carry is no more than 524224, then the * result fits in 32 bits, and the next carry will be no more * than 524224 (because 4*(32764^2)+524224 < 8192*524225). * * We thus just skip one of the products in the middle word, * then do a carry propagation (this reduces words to 13 bits * each, except possibly the last, which may use up to 17 bits * or so), then add the missing product. */ w[80 + 0] = MUL15(u[40 + 0], v[40 + 0]); w[80 + 1] = MUL15(u[40 + 0], v[40 + 1]) + MUL15(u[40 + 1], v[40 + 0]); w[80 + 2] = MUL15(u[40 + 0], v[40 + 2]) + MUL15(u[40 + 1], v[40 + 1]) + MUL15(u[40 + 2], v[40 + 0]); w[80 + 3] = MUL15(u[40 + 0], v[40 + 3]) + MUL15(u[40 + 1], v[40 + 2]) + MUL15(u[40 + 2], v[40 + 1]) + MUL15(u[40 + 3], v[40 + 0]); w[80 + 4] = MUL15(u[40 + 0], v[40 + 4]) + MUL15(u[40 + 1], v[40 + 3]) + MUL15(u[40 + 2], v[40 + 2]) + MUL15(u[40 + 3], v[40 + 1]); /* + MUL15(u[40 + 4], v[40 + 0]) */ w[80 + 5] = MUL15(u[40 + 1], v[40 + 4]) + MUL15(u[40 + 2], v[40 + 3]) + MUL15(u[40 + 3], v[40 + 2]) + MUL15(u[40 + 4], v[40 + 1]); w[80 + 6] = MUL15(u[40 + 2], v[40 + 4]) + MUL15(u[40 + 3], v[40 + 3]) + MUL15(u[40 + 4], v[40 + 2]); w[80 + 7] = MUL15(u[40 + 3], v[40 + 4]) + MUL15(u[40 + 4], v[40 + 3]); w[80 + 8] = MUL15(u[40 + 4], v[40 + 4]); CPR(w, 80); w[80 + 4] += MUL15(u[40 + 4], v[40 + 0]); /* * The products on 14-bit words in slots 6 and 7 yield values * up to 5*(16382^2) each, and we need to subtract two such * values from the higher word. We need the subtraction to fit * in a _signed_ 32-bit integer, i.e. 31 bits + a sign bit. * However, 10*(16382^2) does not fit. So we must perform a * bit of reduction here. */ CPR(w, 60); CPR(w, 70); /* * Recompose results. */ /* 0..1*0..1 into 0..3 */ ZSUB2F(w, 8, w, 0, w, 2); ZSUB2F(w, 9, w, 1, w, 3); ZADDT(w, 1, w, 8); ZADDT(w, 2, w, 9); /* 2..3*2..3 into 4..7 */ ZSUB2F(w, 10, w, 4, w, 6); ZSUB2F(w, 11, w, 5, w, 7); ZADDT(w, 5, w, 10); ZADDT(w, 6, w, 11); /* (0..1+2..3)*(0..1+2..3) into 12..15 */ ZSUB2F(w, 16, w, 12, w, 14); ZSUB2F(w, 17, w, 13, w, 15); ZADDT(w, 13, w, 16); ZADDT(w, 14, w, 17); /* first-level recomposition */ ZSUB2F(w, 12, w, 0, w, 4); ZSUB2F(w, 13, w, 1, w, 5); ZSUB2F(w, 14, w, 2, w, 6); ZSUB2F(w, 15, w, 3, w, 7); ZADDT(w, 2, w, 12); ZADDT(w, 3, w, 13); ZADDT(w, 4, w, 14); ZADDT(w, 5, w, 15); /* * Perform carry propagation to bring all words down to 13 bits. */ cc = _src_ec_ec_c25519_m15_cnorm13(d, w, 40); d[39] += (cc << 13); #undef ZADD #undef ZADDT #undef ZSUB2F #undef CPR1 #undef CPR } static inline void _src_ec_ec_c25519_m15_csquare20(uint32_t *d, const uint32_t *a) { _src_ec_ec_c25519_m15_cmul20(d, a, a); } #else static void _src_ec_ec_c25519_m15_cmul20(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[39]; t[ 0] = MUL15(a[ 0], b[ 0]); t[ 1] = MUL15(a[ 0], b[ 1]) + MUL15(a[ 1], b[ 0]); t[ 2] = MUL15(a[ 0], b[ 2]) + MUL15(a[ 1], b[ 1]) + MUL15(a[ 2], b[ 0]); t[ 3] = MUL15(a[ 0], b[ 3]) + MUL15(a[ 1], b[ 2]) + MUL15(a[ 2], b[ 1]) + MUL15(a[ 3], b[ 0]); t[ 4] = MUL15(a[ 0], b[ 4]) + MUL15(a[ 1], b[ 3]) + MUL15(a[ 2], b[ 2]) + MUL15(a[ 3], b[ 1]) + MUL15(a[ 4], b[ 0]); t[ 5] = MUL15(a[ 0], b[ 5]) + MUL15(a[ 1], b[ 4]) + MUL15(a[ 2], b[ 3]) + MUL15(a[ 3], b[ 2]) + MUL15(a[ 4], b[ 1]) + MUL15(a[ 5], b[ 0]); t[ 6] = MUL15(a[ 0], b[ 6]) + MUL15(a[ 1], b[ 5]) + MUL15(a[ 2], b[ 4]) + MUL15(a[ 3], b[ 3]) + MUL15(a[ 4], b[ 2]) + MUL15(a[ 5], b[ 1]) + MUL15(a[ 6], b[ 0]); t[ 7] = MUL15(a[ 0], b[ 7]) + MUL15(a[ 1], b[ 6]) + MUL15(a[ 2], b[ 5]) + MUL15(a[ 3], b[ 4]) + MUL15(a[ 4], b[ 3]) + MUL15(a[ 5], b[ 2]) + MUL15(a[ 6], b[ 1]) + MUL15(a[ 7], b[ 0]); t[ 8] = MUL15(a[ 0], b[ 8]) + MUL15(a[ 1], b[ 7]) + MUL15(a[ 2], b[ 6]) + MUL15(a[ 3], b[ 5]) + MUL15(a[ 4], b[ 4]) + MUL15(a[ 5], b[ 3]) + MUL15(a[ 6], b[ 2]) + MUL15(a[ 7], b[ 1]) + MUL15(a[ 8], b[ 0]); t[ 9] = MUL15(a[ 0], b[ 9]) + MUL15(a[ 1], b[ 8]) + MUL15(a[ 2], b[ 7]) + MUL15(a[ 3], b[ 6]) + MUL15(a[ 4], b[ 5]) + MUL15(a[ 5], b[ 4]) + MUL15(a[ 6], b[ 3]) + MUL15(a[ 7], b[ 2]) + MUL15(a[ 8], b[ 1]) + MUL15(a[ 9], b[ 0]); t[10] = MUL15(a[ 0], b[10]) + MUL15(a[ 1], b[ 9]) + MUL15(a[ 2], b[ 8]) + MUL15(a[ 3], b[ 7]) + MUL15(a[ 4], b[ 6]) + MUL15(a[ 5], b[ 5]) + MUL15(a[ 6], b[ 4]) + MUL15(a[ 7], b[ 3]) + MUL15(a[ 8], b[ 2]) + MUL15(a[ 9], b[ 1]) + MUL15(a[10], b[ 0]); t[11] = MUL15(a[ 0], b[11]) + MUL15(a[ 1], b[10]) + MUL15(a[ 2], b[ 9]) + MUL15(a[ 3], b[ 8]) + MUL15(a[ 4], b[ 7]) + MUL15(a[ 5], b[ 6]) + MUL15(a[ 6], b[ 5]) + MUL15(a[ 7], b[ 4]) + MUL15(a[ 8], b[ 3]) + MUL15(a[ 9], b[ 2]) + MUL15(a[10], b[ 1]) + MUL15(a[11], b[ 0]); t[12] = MUL15(a[ 0], b[12]) + MUL15(a[ 1], b[11]) + MUL15(a[ 2], b[10]) + MUL15(a[ 3], b[ 9]) + MUL15(a[ 4], b[ 8]) + MUL15(a[ 5], b[ 7]) + MUL15(a[ 6], b[ 6]) + MUL15(a[ 7], b[ 5]) + MUL15(a[ 8], b[ 4]) + MUL15(a[ 9], b[ 3]) + MUL15(a[10], b[ 2]) + MUL15(a[11], b[ 1]) + MUL15(a[12], b[ 0]); t[13] = MUL15(a[ 0], b[13]) + MUL15(a[ 1], b[12]) + MUL15(a[ 2], b[11]) + MUL15(a[ 3], b[10]) + MUL15(a[ 4], b[ 9]) + MUL15(a[ 5], b[ 8]) + MUL15(a[ 6], b[ 7]) + MUL15(a[ 7], b[ 6]) + MUL15(a[ 8], b[ 5]) + MUL15(a[ 9], b[ 4]) + MUL15(a[10], b[ 3]) + MUL15(a[11], b[ 2]) + MUL15(a[12], b[ 1]) + MUL15(a[13], b[ 0]); t[14] = MUL15(a[ 0], b[14]) + MUL15(a[ 1], b[13]) + MUL15(a[ 2], b[12]) + MUL15(a[ 3], b[11]) + MUL15(a[ 4], b[10]) + MUL15(a[ 5], b[ 9]) + MUL15(a[ 6], b[ 8]) + MUL15(a[ 7], b[ 7]) + MUL15(a[ 8], b[ 6]) + MUL15(a[ 9], b[ 5]) + MUL15(a[10], b[ 4]) + MUL15(a[11], b[ 3]) + MUL15(a[12], b[ 2]) + MUL15(a[13], b[ 1]) + MUL15(a[14], b[ 0]); t[15] = MUL15(a[ 0], b[15]) + MUL15(a[ 1], b[14]) + MUL15(a[ 2], b[13]) + MUL15(a[ 3], b[12]) + MUL15(a[ 4], b[11]) + MUL15(a[ 5], b[10]) + MUL15(a[ 6], b[ 9]) + MUL15(a[ 7], b[ 8]) + MUL15(a[ 8], b[ 7]) + MUL15(a[ 9], b[ 6]) + MUL15(a[10], b[ 5]) + MUL15(a[11], b[ 4]) + MUL15(a[12], b[ 3]) + MUL15(a[13], b[ 2]) + MUL15(a[14], b[ 1]) + MUL15(a[15], b[ 0]); t[16] = MUL15(a[ 0], b[16]) + MUL15(a[ 1], b[15]) + MUL15(a[ 2], b[14]) + MUL15(a[ 3], b[13]) + MUL15(a[ 4], b[12]) + MUL15(a[ 5], b[11]) + MUL15(a[ 6], b[10]) + MUL15(a[ 7], b[ 9]) + MUL15(a[ 8], b[ 8]) + MUL15(a[ 9], b[ 7]) + MUL15(a[10], b[ 6]) + MUL15(a[11], b[ 5]) + MUL15(a[12], b[ 4]) + MUL15(a[13], b[ 3]) + MUL15(a[14], b[ 2]) + MUL15(a[15], b[ 1]) + MUL15(a[16], b[ 0]); t[17] = MUL15(a[ 0], b[17]) + MUL15(a[ 1], b[16]) + MUL15(a[ 2], b[15]) + MUL15(a[ 3], b[14]) + MUL15(a[ 4], b[13]) + MUL15(a[ 5], b[12]) + MUL15(a[ 6], b[11]) + MUL15(a[ 7], b[10]) + MUL15(a[ 8], b[ 9]) + MUL15(a[ 9], b[ 8]) + MUL15(a[10], b[ 7]) + MUL15(a[11], b[ 6]) + MUL15(a[12], b[ 5]) + MUL15(a[13], b[ 4]) + MUL15(a[14], b[ 3]) + MUL15(a[15], b[ 2]) + MUL15(a[16], b[ 1]) + MUL15(a[17], b[ 0]); t[18] = MUL15(a[ 0], b[18]) + MUL15(a[ 1], b[17]) + MUL15(a[ 2], b[16]) + MUL15(a[ 3], b[15]) + MUL15(a[ 4], b[14]) + MUL15(a[ 5], b[13]) + MUL15(a[ 6], b[12]) + MUL15(a[ 7], b[11]) + MUL15(a[ 8], b[10]) + MUL15(a[ 9], b[ 9]) + MUL15(a[10], b[ 8]) + MUL15(a[11], b[ 7]) + MUL15(a[12], b[ 6]) + MUL15(a[13], b[ 5]) + MUL15(a[14], b[ 4]) + MUL15(a[15], b[ 3]) + MUL15(a[16], b[ 2]) + MUL15(a[17], b[ 1]) + MUL15(a[18], b[ 0]); t[19] = MUL15(a[ 0], b[19]) + MUL15(a[ 1], b[18]) + MUL15(a[ 2], b[17]) + MUL15(a[ 3], b[16]) + MUL15(a[ 4], b[15]) + MUL15(a[ 5], b[14]) + MUL15(a[ 6], b[13]) + MUL15(a[ 7], b[12]) + MUL15(a[ 8], b[11]) + MUL15(a[ 9], b[10]) + MUL15(a[10], b[ 9]) + MUL15(a[11], b[ 8]) + MUL15(a[12], b[ 7]) + MUL15(a[13], b[ 6]) + MUL15(a[14], b[ 5]) + MUL15(a[15], b[ 4]) + MUL15(a[16], b[ 3]) + MUL15(a[17], b[ 2]) + MUL15(a[18], b[ 1]) + MUL15(a[19], b[ 0]); t[20] = MUL15(a[ 1], b[19]) + MUL15(a[ 2], b[18]) + MUL15(a[ 3], b[17]) + MUL15(a[ 4], b[16]) + MUL15(a[ 5], b[15]) + MUL15(a[ 6], b[14]) + MUL15(a[ 7], b[13]) + MUL15(a[ 8], b[12]) + MUL15(a[ 9], b[11]) + MUL15(a[10], b[10]) + MUL15(a[11], b[ 9]) + MUL15(a[12], b[ 8]) + MUL15(a[13], b[ 7]) + MUL15(a[14], b[ 6]) + MUL15(a[15], b[ 5]) + MUL15(a[16], b[ 4]) + MUL15(a[17], b[ 3]) + MUL15(a[18], b[ 2]) + MUL15(a[19], b[ 1]); t[21] = MUL15(a[ 2], b[19]) + MUL15(a[ 3], b[18]) + MUL15(a[ 4], b[17]) + MUL15(a[ 5], b[16]) + MUL15(a[ 6], b[15]) + MUL15(a[ 7], b[14]) + MUL15(a[ 8], b[13]) + MUL15(a[ 9], b[12]) + MUL15(a[10], b[11]) + MUL15(a[11], b[10]) + MUL15(a[12], b[ 9]) + MUL15(a[13], b[ 8]) + MUL15(a[14], b[ 7]) + MUL15(a[15], b[ 6]) + MUL15(a[16], b[ 5]) + MUL15(a[17], b[ 4]) + MUL15(a[18], b[ 3]) + MUL15(a[19], b[ 2]); t[22] = MUL15(a[ 3], b[19]) + MUL15(a[ 4], b[18]) + MUL15(a[ 5], b[17]) + MUL15(a[ 6], b[16]) + MUL15(a[ 7], b[15]) + MUL15(a[ 8], b[14]) + MUL15(a[ 9], b[13]) + MUL15(a[10], b[12]) + MUL15(a[11], b[11]) + MUL15(a[12], b[10]) + MUL15(a[13], b[ 9]) + MUL15(a[14], b[ 8]) + MUL15(a[15], b[ 7]) + MUL15(a[16], b[ 6]) + MUL15(a[17], b[ 5]) + MUL15(a[18], b[ 4]) + MUL15(a[19], b[ 3]); t[23] = MUL15(a[ 4], b[19]) + MUL15(a[ 5], b[18]) + MUL15(a[ 6], b[17]) + MUL15(a[ 7], b[16]) + MUL15(a[ 8], b[15]) + MUL15(a[ 9], b[14]) + MUL15(a[10], b[13]) + MUL15(a[11], b[12]) + MUL15(a[12], b[11]) + MUL15(a[13], b[10]) + MUL15(a[14], b[ 9]) + MUL15(a[15], b[ 8]) + MUL15(a[16], b[ 7]) + MUL15(a[17], b[ 6]) + MUL15(a[18], b[ 5]) + MUL15(a[19], b[ 4]); t[24] = MUL15(a[ 5], b[19]) + MUL15(a[ 6], b[18]) + MUL15(a[ 7], b[17]) + MUL15(a[ 8], b[16]) + MUL15(a[ 9], b[15]) + MUL15(a[10], b[14]) + MUL15(a[11], b[13]) + MUL15(a[12], b[12]) + MUL15(a[13], b[11]) + MUL15(a[14], b[10]) + MUL15(a[15], b[ 9]) + MUL15(a[16], b[ 8]) + MUL15(a[17], b[ 7]) + MUL15(a[18], b[ 6]) + MUL15(a[19], b[ 5]); t[25] = MUL15(a[ 6], b[19]) + MUL15(a[ 7], b[18]) + MUL15(a[ 8], b[17]) + MUL15(a[ 9], b[16]) + MUL15(a[10], b[15]) + MUL15(a[11], b[14]) + MUL15(a[12], b[13]) + MUL15(a[13], b[12]) + MUL15(a[14], b[11]) + MUL15(a[15], b[10]) + MUL15(a[16], b[ 9]) + MUL15(a[17], b[ 8]) + MUL15(a[18], b[ 7]) + MUL15(a[19], b[ 6]); t[26] = MUL15(a[ 7], b[19]) + MUL15(a[ 8], b[18]) + MUL15(a[ 9], b[17]) + MUL15(a[10], b[16]) + MUL15(a[11], b[15]) + MUL15(a[12], b[14]) + MUL15(a[13], b[13]) + MUL15(a[14], b[12]) + MUL15(a[15], b[11]) + MUL15(a[16], b[10]) + MUL15(a[17], b[ 9]) + MUL15(a[18], b[ 8]) + MUL15(a[19], b[ 7]); t[27] = MUL15(a[ 8], b[19]) + MUL15(a[ 9], b[18]) + MUL15(a[10], b[17]) + MUL15(a[11], b[16]) + MUL15(a[12], b[15]) + MUL15(a[13], b[14]) + MUL15(a[14], b[13]) + MUL15(a[15], b[12]) + MUL15(a[16], b[11]) + MUL15(a[17], b[10]) + MUL15(a[18], b[ 9]) + MUL15(a[19], b[ 8]); t[28] = MUL15(a[ 9], b[19]) + MUL15(a[10], b[18]) + MUL15(a[11], b[17]) + MUL15(a[12], b[16]) + MUL15(a[13], b[15]) + MUL15(a[14], b[14]) + MUL15(a[15], b[13]) + MUL15(a[16], b[12]) + MUL15(a[17], b[11]) + MUL15(a[18], b[10]) + MUL15(a[19], b[ 9]); t[29] = MUL15(a[10], b[19]) + MUL15(a[11], b[18]) + MUL15(a[12], b[17]) + MUL15(a[13], b[16]) + MUL15(a[14], b[15]) + MUL15(a[15], b[14]) + MUL15(a[16], b[13]) + MUL15(a[17], b[12]) + MUL15(a[18], b[11]) + MUL15(a[19], b[10]); t[30] = MUL15(a[11], b[19]) + MUL15(a[12], b[18]) + MUL15(a[13], b[17]) + MUL15(a[14], b[16]) + MUL15(a[15], b[15]) + MUL15(a[16], b[14]) + MUL15(a[17], b[13]) + MUL15(a[18], b[12]) + MUL15(a[19], b[11]); t[31] = MUL15(a[12], b[19]) + MUL15(a[13], b[18]) + MUL15(a[14], b[17]) + MUL15(a[15], b[16]) + MUL15(a[16], b[15]) + MUL15(a[17], b[14]) + MUL15(a[18], b[13]) + MUL15(a[19], b[12]); t[32] = MUL15(a[13], b[19]) + MUL15(a[14], b[18]) + MUL15(a[15], b[17]) + MUL15(a[16], b[16]) + MUL15(a[17], b[15]) + MUL15(a[18], b[14]) + MUL15(a[19], b[13]); t[33] = MUL15(a[14], b[19]) + MUL15(a[15], b[18]) + MUL15(a[16], b[17]) + MUL15(a[17], b[16]) + MUL15(a[18], b[15]) + MUL15(a[19], b[14]); t[34] = MUL15(a[15], b[19]) + MUL15(a[16], b[18]) + MUL15(a[17], b[17]) + MUL15(a[18], b[16]) + MUL15(a[19], b[15]); t[35] = MUL15(a[16], b[19]) + MUL15(a[17], b[18]) + MUL15(a[18], b[17]) + MUL15(a[19], b[16]); t[36] = MUL15(a[17], b[19]) + MUL15(a[18], b[18]) + MUL15(a[19], b[17]); t[37] = MUL15(a[18], b[19]) + MUL15(a[19], b[18]); t[38] = MUL15(a[19], b[19]); d[39] = _src_ec_ec_c25519_m15_cnorm13(d, t, 39); } static void _src_ec_ec_c25519_m15_csquare20(uint32_t *d, const uint32_t *a) { uint32_t t[39]; t[ 0] = MUL15(a[ 0], a[ 0]); t[ 1] = ((MUL15(a[ 0], a[ 1])) << 1); t[ 2] = MUL15(a[ 1], a[ 1]) + ((MUL15(a[ 0], a[ 2])) << 1); t[ 3] = ((MUL15(a[ 0], a[ 3]) + MUL15(a[ 1], a[ 2])) << 1); t[ 4] = MUL15(a[ 2], a[ 2]) + ((MUL15(a[ 0], a[ 4]) + MUL15(a[ 1], a[ 3])) << 1); t[ 5] = ((MUL15(a[ 0], a[ 5]) + MUL15(a[ 1], a[ 4]) + MUL15(a[ 2], a[ 3])) << 1); t[ 6] = MUL15(a[ 3], a[ 3]) + ((MUL15(a[ 0], a[ 6]) + MUL15(a[ 1], a[ 5]) + MUL15(a[ 2], a[ 4])) << 1); t[ 7] = ((MUL15(a[ 0], a[ 7]) + MUL15(a[ 1], a[ 6]) + MUL15(a[ 2], a[ 5]) + MUL15(a[ 3], a[ 4])) << 1); t[ 8] = MUL15(a[ 4], a[ 4]) + ((MUL15(a[ 0], a[ 8]) + MUL15(a[ 1], a[ 7]) + MUL15(a[ 2], a[ 6]) + MUL15(a[ 3], a[ 5])) << 1); t[ 9] = ((MUL15(a[ 0], a[ 9]) + MUL15(a[ 1], a[ 8]) + MUL15(a[ 2], a[ 7]) + MUL15(a[ 3], a[ 6]) + MUL15(a[ 4], a[ 5])) << 1); t[10] = MUL15(a[ 5], a[ 5]) + ((MUL15(a[ 0], a[10]) + MUL15(a[ 1], a[ 9]) + MUL15(a[ 2], a[ 8]) + MUL15(a[ 3], a[ 7]) + MUL15(a[ 4], a[ 6])) << 1); t[11] = ((MUL15(a[ 0], a[11]) + MUL15(a[ 1], a[10]) + MUL15(a[ 2], a[ 9]) + MUL15(a[ 3], a[ 8]) + MUL15(a[ 4], a[ 7]) + MUL15(a[ 5], a[ 6])) << 1); t[12] = MUL15(a[ 6], a[ 6]) + ((MUL15(a[ 0], a[12]) + MUL15(a[ 1], a[11]) + MUL15(a[ 2], a[10]) + MUL15(a[ 3], a[ 9]) + MUL15(a[ 4], a[ 8]) + MUL15(a[ 5], a[ 7])) << 1); t[13] = ((MUL15(a[ 0], a[13]) + MUL15(a[ 1], a[12]) + MUL15(a[ 2], a[11]) + MUL15(a[ 3], a[10]) + MUL15(a[ 4], a[ 9]) + MUL15(a[ 5], a[ 8]) + MUL15(a[ 6], a[ 7])) << 1); t[14] = MUL15(a[ 7], a[ 7]) + ((MUL15(a[ 0], a[14]) + MUL15(a[ 1], a[13]) + MUL15(a[ 2], a[12]) + MUL15(a[ 3], a[11]) + MUL15(a[ 4], a[10]) + MUL15(a[ 5], a[ 9]) + MUL15(a[ 6], a[ 8])) << 1); t[15] = ((MUL15(a[ 0], a[15]) + MUL15(a[ 1], a[14]) + MUL15(a[ 2], a[13]) + MUL15(a[ 3], a[12]) + MUL15(a[ 4], a[11]) + MUL15(a[ 5], a[10]) + MUL15(a[ 6], a[ 9]) + MUL15(a[ 7], a[ 8])) << 1); t[16] = MUL15(a[ 8], a[ 8]) + ((MUL15(a[ 0], a[16]) + MUL15(a[ 1], a[15]) + MUL15(a[ 2], a[14]) + MUL15(a[ 3], a[13]) + MUL15(a[ 4], a[12]) + MUL15(a[ 5], a[11]) + MUL15(a[ 6], a[10]) + MUL15(a[ 7], a[ 9])) << 1); t[17] = ((MUL15(a[ 0], a[17]) + MUL15(a[ 1], a[16]) + MUL15(a[ 2], a[15]) + MUL15(a[ 3], a[14]) + MUL15(a[ 4], a[13]) + MUL15(a[ 5], a[12]) + MUL15(a[ 6], a[11]) + MUL15(a[ 7], a[10]) + MUL15(a[ 8], a[ 9])) << 1); t[18] = MUL15(a[ 9], a[ 9]) + ((MUL15(a[ 0], a[18]) + MUL15(a[ 1], a[17]) + MUL15(a[ 2], a[16]) + MUL15(a[ 3], a[15]) + MUL15(a[ 4], a[14]) + MUL15(a[ 5], a[13]) + MUL15(a[ 6], a[12]) + MUL15(a[ 7], a[11]) + MUL15(a[ 8], a[10])) << 1); t[19] = ((MUL15(a[ 0], a[19]) + MUL15(a[ 1], a[18]) + MUL15(a[ 2], a[17]) + MUL15(a[ 3], a[16]) + MUL15(a[ 4], a[15]) + MUL15(a[ 5], a[14]) + MUL15(a[ 6], a[13]) + MUL15(a[ 7], a[12]) + MUL15(a[ 8], a[11]) + MUL15(a[ 9], a[10])) << 1); t[20] = MUL15(a[10], a[10]) + ((MUL15(a[ 1], a[19]) + MUL15(a[ 2], a[18]) + MUL15(a[ 3], a[17]) + MUL15(a[ 4], a[16]) + MUL15(a[ 5], a[15]) + MUL15(a[ 6], a[14]) + MUL15(a[ 7], a[13]) + MUL15(a[ 8], a[12]) + MUL15(a[ 9], a[11])) << 1); t[21] = ((MUL15(a[ 2], a[19]) + MUL15(a[ 3], a[18]) + MUL15(a[ 4], a[17]) + MUL15(a[ 5], a[16]) + MUL15(a[ 6], a[15]) + MUL15(a[ 7], a[14]) + MUL15(a[ 8], a[13]) + MUL15(a[ 9], a[12]) + MUL15(a[10], a[11])) << 1); t[22] = MUL15(a[11], a[11]) + ((MUL15(a[ 3], a[19]) + MUL15(a[ 4], a[18]) + MUL15(a[ 5], a[17]) + MUL15(a[ 6], a[16]) + MUL15(a[ 7], a[15]) + MUL15(a[ 8], a[14]) + MUL15(a[ 9], a[13]) + MUL15(a[10], a[12])) << 1); t[23] = ((MUL15(a[ 4], a[19]) + MUL15(a[ 5], a[18]) + MUL15(a[ 6], a[17]) + MUL15(a[ 7], a[16]) + MUL15(a[ 8], a[15]) + MUL15(a[ 9], a[14]) + MUL15(a[10], a[13]) + MUL15(a[11], a[12])) << 1); t[24] = MUL15(a[12], a[12]) + ((MUL15(a[ 5], a[19]) + MUL15(a[ 6], a[18]) + MUL15(a[ 7], a[17]) + MUL15(a[ 8], a[16]) + MUL15(a[ 9], a[15]) + MUL15(a[10], a[14]) + MUL15(a[11], a[13])) << 1); t[25] = ((MUL15(a[ 6], a[19]) + MUL15(a[ 7], a[18]) + MUL15(a[ 8], a[17]) + MUL15(a[ 9], a[16]) + MUL15(a[10], a[15]) + MUL15(a[11], a[14]) + MUL15(a[12], a[13])) << 1); t[26] = MUL15(a[13], a[13]) + ((MUL15(a[ 7], a[19]) + MUL15(a[ 8], a[18]) + MUL15(a[ 9], a[17]) + MUL15(a[10], a[16]) + MUL15(a[11], a[15]) + MUL15(a[12], a[14])) << 1); t[27] = ((MUL15(a[ 8], a[19]) + MUL15(a[ 9], a[18]) + MUL15(a[10], a[17]) + MUL15(a[11], a[16]) + MUL15(a[12], a[15]) + MUL15(a[13], a[14])) << 1); t[28] = MUL15(a[14], a[14]) + ((MUL15(a[ 9], a[19]) + MUL15(a[10], a[18]) + MUL15(a[11], a[17]) + MUL15(a[12], a[16]) + MUL15(a[13], a[15])) << 1); t[29] = ((MUL15(a[10], a[19]) + MUL15(a[11], a[18]) + MUL15(a[12], a[17]) + MUL15(a[13], a[16]) + MUL15(a[14], a[15])) << 1); t[30] = MUL15(a[15], a[15]) + ((MUL15(a[11], a[19]) + MUL15(a[12], a[18]) + MUL15(a[13], a[17]) + MUL15(a[14], a[16])) << 1); t[31] = ((MUL15(a[12], a[19]) + MUL15(a[13], a[18]) + MUL15(a[14], a[17]) + MUL15(a[15], a[16])) << 1); t[32] = MUL15(a[16], a[16]) + ((MUL15(a[13], a[19]) + MUL15(a[14], a[18]) + MUL15(a[15], a[17])) << 1); t[33] = ((MUL15(a[14], a[19]) + MUL15(a[15], a[18]) + MUL15(a[16], a[17])) << 1); t[34] = MUL15(a[17], a[17]) + ((MUL15(a[15], a[19]) + MUL15(a[16], a[18])) << 1); t[35] = ((MUL15(a[16], a[19]) + MUL15(a[17], a[18])) << 1); t[36] = MUL15(a[18], a[18]) + ((MUL15(a[17], a[19])) << 1); t[37] = ((MUL15(a[18], a[19])) << 1); t[38] = MUL15(a[19], a[19]); d[39] = _src_ec_ec_c25519_m15_cnorm13(d, t, 39); } #endif /* * Perform a "final reduction" in field F255 (field for Curve25519) * The source value must be less than twice the modulus. If the value * is not lower than the modulus, then the modulus is subtracted and * this function returns 1; otherwise, it leaves it untouched and it * returns 0. */ static uint32_t _src_ec_ec_c25519_m15_creduce_final_f255(uint32_t *d) { uint32_t t[20]; uint32_t cc; int i; memcpy(t, d, sizeof t); cc = 19; for (i = 0; i < 20; i ++) { uint32_t w; w = t[i] + cc; cc = w >> 13; t[i] = w & 0x1FFF; } cc = t[19] >> 8; t[19] &= 0xFF; CCOPY(cc, d, t, sizeof t); return cc; } static void _src_ec_ec_c25519_m15_cf255_mulgen(uint32_t *d, const uint32_t *a, const uint32_t *b, int square) { uint32_t t[40], cc, w; /* * Compute raw multiplication. All result words fit in 13 bits * each; upper word (t[39]) must fit on 5 bits, since the product * of two 256-bit integers must fit on 512 bits. */ if (square) { _src_ec_ec_c25519_m15_csquare20(t, a); } else { _src_ec_ec_c25519_m15_cmul20(t, a, b); } /* * Modular reduction: each high word is added where necessary. * Since the modulus is 2^255-19 and word 20 corresponds to * offset 20*13 = 260, word 20+k must be added to word k with * a factor of 19*2^5 = 608. The extra bits in word 19 are also * added that way. */ cc = MUL15(t[19] >> 8, 19); t[19] &= 0xFF; #define MM1(x) do { \ w = t[x] + cc + MUL15(t[(x) + 20], 608); \ t[x] = w & 0x1FFF; \ cc = w >> 13; \ } while (0) MM1( 0); MM1( 1); MM1( 2); MM1( 3); MM1( 4); MM1( 5); MM1( 6); MM1( 7); MM1( 8); MM1( 9); MM1(10); MM1(11); MM1(12); MM1(13); MM1(14); MM1(15); MM1(16); MM1(17); MM1(18); MM1(19); #undef MM1 cc = MUL15(w >> 8, 19); t[19] &= 0xFF; #define MM2(x) do { \ w = t[x] + cc; \ d[x] = w & 0x1FFF; \ cc = w >> 13; \ } while (0) MM2( 0); MM2( 1); MM2( 2); MM2( 3); MM2( 4); MM2( 5); MM2( 6); MM2( 7); MM2( 8); MM2( 9); MM2(10); MM2(11); MM2(12); MM2(13); MM2(14); MM2(15); MM2(16); MM2(17); MM2(18); MM2(19); #undef MM2 } /* * Perform a multiplication of two integers modulo 2^255-19. * Operands are arrays of 20 words, each containing 13 bits of data, in * little-endian order. Input value may be up to 2^256-1; on output, value * fits on 256 bits and is lower than twice the modulus. * * _src_ec_ec_c25519_m15_cf255_mul() is the general multiplication, _src_ec_ec_c25519_m15_cf255_square() is specialised * for squarings. */ #define _src_ec_ec_c25519_m15_cf255_mul(d, a, b) _src_ec_ec_c25519_m15_cf255_mulgen(d, a, b, 0) #define _src_ec_ec_c25519_m15_cf255_square(d, a) _src_ec_ec_c25519_m15_cf255_mulgen(d, a, a, 1) /* * Add two values in F255. Partial reduction is performed (down to less * than twice the modulus). */ static void _src_ec_ec_c25519_m15_cf255_add(uint32_t *d, const uint32_t *a, const uint32_t *b) { int i; uint32_t cc, w; cc = 0; for (i = 0; i < 20; i ++) { w = a[i] + b[i] + cc; d[i] = w & 0x1FFF; cc = w >> 13; } cc = MUL15(w >> 8, 19); d[19] &= 0xFF; for (i = 0; i < 20; i ++) { w = d[i] + cc; d[i] = w & 0x1FFF; cc = w >> 13; } } /* * Subtract one value from another in F255. Partial reduction is * performed (down to less than twice the modulus). */ static void _src_ec_ec_c25519_m15_cf255_sub(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * We actually compute a - b + 2*p, so that the final value is * necessarily positive. */ int i; uint32_t cc, w; cc = (uint32_t)-38; for (i = 0; i < 20; i ++) { w = a[i] - b[i] + cc; d[i] = w & 0x1FFF; cc = ARSH(w, 13); } cc = MUL15((w + 0x200) >> 8, 19); d[19] &= 0xFF; for (i = 0; i < 20; i ++) { w = d[i] + cc; d[i] = w & 0x1FFF; cc = w >> 13; } } /* * Multiply an integer by the 'A24' constant (121665). Partial reduction * is performed (down to less than twice the modulus). */ static void _src_ec_ec_c25519_m15_cf255_mul_a24(uint32_t *d, const uint32_t *a) { int i; uint32_t cc, w; cc = 0; for (i = 0; i < 20; i ++) { w = MUL15(a[i], 121665) + cc; d[i] = w & 0x1FFF; cc = w >> 13; } cc = MUL15(w >> 8, 19); d[19] &= 0xFF; for (i = 0; i < 20; i ++) { w = d[i] + cc; d[i] = w & 0x1FFF; cc = w >> 13; } } static const unsigned char _src_ec_ec_c25519_m15_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_m15_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_m15_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m15_cGEN; } static const unsigned char * _src_ec_ec_c25519_m15_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m15_cORDER; } static size_t _src_ec_ec_c25519_m15_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } static void _src_ec_ec_c25519_m15_ccswap(uint32_t *a, uint32_t *b, uint32_t ctl) { int i; ctl = -ctl; for (i = 0; i < 20; i ++) { uint32_t aw, bw, tw; aw = a[i]; bw = b[i]; tw = ctl & (aw ^ bw); a[i] = aw ^ tw; b[i] = bw ^ tw; } } static uint32_t _src_ec_ec_c25519_m15_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { uint32_t x1[20], x2[20], x3[20], z2[20], z3[20]; uint32_t a[20], aa[20], b[20], bb[20]; uint32_t c[20], d[20], e[20], da[20], cb[20]; unsigned char k[32]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared. */ if (Glen != 32 || kblen > 32) { return 0; } G[31] &= 0x7F; /* * Initialise variables x1, x2, z2, x3 and z3. We set all of them * into Montgomery representation. */ x1[19] = le8_to_le13(x1, G, 32); memcpy(x3, x1, sizeof x1); memset(z2, 0, sizeof z2); memset(x2, 0, sizeof x2); x2[0] = 1; memset(z3, 0, sizeof z3); z3[0] = 1; memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; /* obsolete print_int("x1", x1); */ swap = 0; for (i = 254; i >= 0; i --) { uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_m15_ccswap(x2, x3, swap); _src_ec_ec_c25519_m15_ccswap(z2, z3, swap); swap = kt; /* obsolete print_int("x2", x2); print_int("z2", z2); print_int("x3", x3); print_int("z3", z3); */ _src_ec_ec_c25519_m15_cf255_add(a, x2, z2); _src_ec_ec_c25519_m15_cf255_square(aa, a); _src_ec_ec_c25519_m15_cf255_sub(b, x2, z2); _src_ec_ec_c25519_m15_cf255_square(bb, b); _src_ec_ec_c25519_m15_cf255_sub(e, aa, bb); _src_ec_ec_c25519_m15_cf255_add(c, x3, z3); _src_ec_ec_c25519_m15_cf255_sub(d, x3, z3); _src_ec_ec_c25519_m15_cf255_mul(da, d, a); _src_ec_ec_c25519_m15_cf255_mul(cb, c, b); /* obsolete print_int("a ", a); print_int("aa", aa); print_int("b ", b); print_int("bb", bb); print_int("e ", e); print_int("c ", c); print_int("d ", d); print_int("da", da); print_int("cb", cb); */ _src_ec_ec_c25519_m15_cf255_add(x3, da, cb); _src_ec_ec_c25519_m15_cf255_square(x3, x3); _src_ec_ec_c25519_m15_cf255_sub(z3, da, cb); _src_ec_ec_c25519_m15_cf255_square(z3, z3); _src_ec_ec_c25519_m15_cf255_mul(z3, z3, x1); _src_ec_ec_c25519_m15_cf255_mul(x2, aa, bb); _src_ec_ec_c25519_m15_cf255_mul_a24(z2, e); _src_ec_ec_c25519_m15_cf255_add(z2, z2, aa); _src_ec_ec_c25519_m15_cf255_mul(z2, e, z2); /* obsolete print_int("x2", x2); print_int("z2", z2); print_int("x3", x3); print_int("z3", z3); */ } _src_ec_ec_c25519_m15_ccswap(x2, x3, swap); _src_ec_ec_c25519_m15_ccswap(z2, z3, swap); /* * Inverse z2 with a modular exponentiation. This is a simple * square-and-multiply algorithm; we mutualise most non-squarings * since the exponent contains almost only ones. */ memcpy(a, z2, sizeof z2); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_m15_cf255_square(a, a); _src_ec_ec_c25519_m15_cf255_mul(a, a, z2); } memcpy(b, a, sizeof a); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_m15_cf255_square(b, b); } _src_ec_ec_c25519_m15_cf255_mul(b, b, a); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_m15_cf255_square(b, b); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_m15_cf255_mul(b, z2, b); } } _src_ec_ec_c25519_m15_cf255_mul(x2, x2, b); _src_ec_ec_c25519_m15_creduce_final_f255(x2); le13_to_le8(G, 32, x2); return 1; } static size_t _src_ec_ec_c25519_m15_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_m15_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_m15_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_m15_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_m15 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_m15_capi_generator, &_src_ec_ec_c25519_m15_capi_order, &_src_ec_ec_c25519_m15_capi_xoff, &_src_ec_ec_c25519_m15_capi_mul, &_src_ec_ec_c25519_m15_capi_mulgen, &_src_ec_ec_c25519_m15_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* obsolete #include #include static void print_int(const char *name, const uint32_t *x) { size_t u; unsigned char tmp[40]; printf("%s = ", name); for (u = 0; u < 9; u ++) { if (x[u] > 0x3FFFFFFF) { printf("INVALID:"); for (u = 0; u < 9; u ++) { printf(" %08X", x[u]); } printf("\n"); return; } } memset(tmp, 0, sizeof tmp); for (u = 0; u < 9; u ++) { uint64_t w; int j, k; w = x[u]; j = 30 * (int)u; k = j & 7; if (k != 0) { w <<= k; j -= k; } k = j >> 3; for (j = 0; j < 8; j ++) { tmp[39 - k - j] |= (unsigned char)w; w >>= 8; } } for (u = 8; u < 40; u ++) { printf("%02X", tmp[u]); } printf("\n"); } */ /* * If BR_NO_ARITH_SHIFT is undefined, or defined to 0, then we _assume_ * that right-shifting a signed negative integer copies the sign bit * (arithmetic right-shift). This is "implementation-defined behaviour", * i.e. it is not undefined, but it may differ between compilers. Each * compiler is supposed to document its behaviour in that respect. GCC * explicitly defines that an arithmetic right shift is used. We expect * all other compilers to do the same, because underlying CPU offer an * arithmetic right shift opcode that could not be used otherwise. */ #if BR_NO_ARITH_SHIFT #define ARSH(x, n) (((uint32_t)(x) >> (n)) \ | ((-((uint32_t)(x) >> 31)) << (32 - (n)))) #else #define ARSH(x, n) ((*(int32_t *)&(x)) >> (n)) #endif /* * Convert an integer from unsigned little-endian encoding to a sequence of * 30-bit words in little-endian order. The final "partial" word is * returned. */ static uint32_t le8_to_le30(uint32_t *dst, const unsigned char *src, size_t len) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { uint32_t b; b = *src ++; if (acc_len < 22) { acc |= b << acc_len; acc_len += 8; } else { *dst ++ = (acc | (b << acc_len)) & 0x3FFFFFFF; acc = b >> (30 - acc_len); acc_len -= 22; } } return acc; } /* * Convert an integer (30-bit words, little-endian) to unsigned * little-endian encoding. The total encoding length is provided; all * the destination bytes will be filled. */ static void le30_to_le8(unsigned char *dst, size_t len, const uint32_t *src) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { if (acc_len < 8) { uint32_t w; w = *src ++; *dst ++ = (unsigned char)(acc | (w << acc_len)); acc = w >> (8 - acc_len); acc_len += 22; } else { *dst ++ = (unsigned char)acc; acc >>= 8; acc_len -= 8; } } } /* * Multiply two integers. Source integers are represented as arrays of * nine 30-bit words, for values up to 2^270-1. Result is encoded over * 18 words of 30 bits each. */ static void _src_ec_ec_c25519_m31_cmul9(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * Maximum intermediate result is no more than * 10376293531797946367, which fits in 64 bits. Reason: * * 10376293531797946367 = 9 * (2^30-1)^2 + 9663676406 * 10376293531797946367 < 9663676407 * 2^30 * * Thus, adding together 9 products of 30-bit integers, with * a carry of at most 9663676406, yields an integer that fits * on 64 bits and generates a carry of at most 9663676406. */ uint64_t t[17]; uint64_t cc; int i; t[ 0] = MUL31(a[0], b[0]); t[ 1] = MUL31(a[0], b[1]) + MUL31(a[1], b[0]); t[ 2] = MUL31(a[0], b[2]) + MUL31(a[1], b[1]) + MUL31(a[2], b[0]); t[ 3] = MUL31(a[0], b[3]) + MUL31(a[1], b[2]) + MUL31(a[2], b[1]) + MUL31(a[3], b[0]); t[ 4] = MUL31(a[0], b[4]) + MUL31(a[1], b[3]) + MUL31(a[2], b[2]) + MUL31(a[3], b[1]) + MUL31(a[4], b[0]); t[ 5] = MUL31(a[0], b[5]) + MUL31(a[1], b[4]) + MUL31(a[2], b[3]) + MUL31(a[3], b[2]) + MUL31(a[4], b[1]) + MUL31(a[5], b[0]); t[ 6] = MUL31(a[0], b[6]) + MUL31(a[1], b[5]) + MUL31(a[2], b[4]) + MUL31(a[3], b[3]) + MUL31(a[4], b[2]) + MUL31(a[5], b[1]) + MUL31(a[6], b[0]); t[ 7] = MUL31(a[0], b[7]) + MUL31(a[1], b[6]) + MUL31(a[2], b[5]) + MUL31(a[3], b[4]) + MUL31(a[4], b[3]) + MUL31(a[5], b[2]) + MUL31(a[6], b[1]) + MUL31(a[7], b[0]); t[ 8] = MUL31(a[0], b[8]) + MUL31(a[1], b[7]) + MUL31(a[2], b[6]) + MUL31(a[3], b[5]) + MUL31(a[4], b[4]) + MUL31(a[5], b[3]) + MUL31(a[6], b[2]) + MUL31(a[7], b[1]) + MUL31(a[8], b[0]); t[ 9] = MUL31(a[1], b[8]) + MUL31(a[2], b[7]) + MUL31(a[3], b[6]) + MUL31(a[4], b[5]) + MUL31(a[5], b[4]) + MUL31(a[6], b[3]) + MUL31(a[7], b[2]) + MUL31(a[8], b[1]); t[10] = MUL31(a[2], b[8]) + MUL31(a[3], b[7]) + MUL31(a[4], b[6]) + MUL31(a[5], b[5]) + MUL31(a[6], b[4]) + MUL31(a[7], b[3]) + MUL31(a[8], b[2]); t[11] = MUL31(a[3], b[8]) + MUL31(a[4], b[7]) + MUL31(a[5], b[6]) + MUL31(a[6], b[5]) + MUL31(a[7], b[4]) + MUL31(a[8], b[3]); t[12] = MUL31(a[4], b[8]) + MUL31(a[5], b[7]) + MUL31(a[6], b[6]) + MUL31(a[7], b[5]) + MUL31(a[8], b[4]); t[13] = MUL31(a[5], b[8]) + MUL31(a[6], b[7]) + MUL31(a[7], b[6]) + MUL31(a[8], b[5]); t[14] = MUL31(a[6], b[8]) + MUL31(a[7], b[7]) + MUL31(a[8], b[6]); t[15] = MUL31(a[7], b[8]) + MUL31(a[8], b[7]); t[16] = MUL31(a[8], b[8]); /* * Propagate carries. */ cc = 0; for (i = 0; i < 17; i ++) { uint64_t w; w = t[i] + cc; d[i] = (uint32_t)w & 0x3FFFFFFF; cc = w >> 30; } d[17] = (uint32_t)cc; } /* * Square a 270-bit integer, represented as an array of nine 30-bit words. * Result uses 18 words of 30 bits each. */ static void _src_ec_ec_c25519_m31_csquare9(uint32_t *d, const uint32_t *a) { uint64_t t[17]; uint64_t cc; int i; t[ 0] = MUL31(a[0], a[0]); t[ 1] = ((MUL31(a[0], a[1])) << 1); t[ 2] = MUL31(a[1], a[1]) + ((MUL31(a[0], a[2])) << 1); t[ 3] = ((MUL31(a[0], a[3]) + MUL31(a[1], a[2])) << 1); t[ 4] = MUL31(a[2], a[2]) + ((MUL31(a[0], a[4]) + MUL31(a[1], a[3])) << 1); t[ 5] = ((MUL31(a[0], a[5]) + MUL31(a[1], a[4]) + MUL31(a[2], a[3])) << 1); t[ 6] = MUL31(a[3], a[3]) + ((MUL31(a[0], a[6]) + MUL31(a[1], a[5]) + MUL31(a[2], a[4])) << 1); t[ 7] = ((MUL31(a[0], a[7]) + MUL31(a[1], a[6]) + MUL31(a[2], a[5]) + MUL31(a[3], a[4])) << 1); t[ 8] = MUL31(a[4], a[4]) + ((MUL31(a[0], a[8]) + MUL31(a[1], a[7]) + MUL31(a[2], a[6]) + MUL31(a[3], a[5])) << 1); t[ 9] = ((MUL31(a[1], a[8]) + MUL31(a[2], a[7]) + MUL31(a[3], a[6]) + MUL31(a[4], a[5])) << 1); t[10] = MUL31(a[5], a[5]) + ((MUL31(a[2], a[8]) + MUL31(a[3], a[7]) + MUL31(a[4], a[6])) << 1); t[11] = ((MUL31(a[3], a[8]) + MUL31(a[4], a[7]) + MUL31(a[5], a[6])) << 1); t[12] = MUL31(a[6], a[6]) + ((MUL31(a[4], a[8]) + MUL31(a[5], a[7])) << 1); t[13] = ((MUL31(a[5], a[8]) + MUL31(a[6], a[7])) << 1); t[14] = MUL31(a[7], a[7]) + ((MUL31(a[6], a[8])) << 1); t[15] = ((MUL31(a[7], a[8])) << 1); t[16] = MUL31(a[8], a[8]); /* * Propagate carries. */ cc = 0; for (i = 0; i < 17; i ++) { uint64_t w; w = t[i] + cc; d[i] = (uint32_t)w & 0x3FFFFFFF; cc = w >> 30; } d[17] = (uint32_t)cc; } /* * Perform a "final reduction" in field F255 (field for Curve25519) * The source value must be less than twice the modulus. If the value * is not lower than the modulus, then the modulus is subtracted and * this function returns 1; otherwise, it leaves it untouched and it * returns 0. */ static uint32_t _src_ec_ec_c25519_m31_creduce_final_f255(uint32_t *d) { uint32_t t[9]; uint32_t cc; int i; memcpy(t, d, sizeof t); cc = 19; for (i = 0; i < 9; i ++) { uint32_t w; w = t[i] + cc; cc = w >> 30; t[i] = w & 0x3FFFFFFF; } cc = t[8] >> 15; t[8] &= 0x7FFF; CCOPY(cc, d, t, sizeof t); return cc; } /* * Perform a multiplication of two integers modulo 2^255-19. * Operands are arrays of 9 words, each containing 30 bits of data, in * little-endian order. Input value may be up to 2^256-1; on output, value * fits on 256 bits and is lower than twice the modulus. */ static void _src_ec_ec_c25519_m31_cf255_mul(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[18], cc; int i; /* * Compute raw multiplication. All result words fit in 30 bits * each; upper word (t[17]) must fit on 2 bits, since the product * of two 256-bit integers must fit on 512 bits. */ _src_ec_ec_c25519_m31_cmul9(t, a, b); /* * Modular reduction: each high word is added where necessary. * Since the modulus is 2^255-19 and word 9 corresponds to * offset 9*30 = 270, word 9+k must be added to word k with * a factor of 19*2^15 = 622592. The extra bits in word 8 are also * added that way. * * Keeping the carry on 32 bits helps with 32-bit architectures, * and does not noticeably impact performance on 64-bit systems. */ cc = MUL15(t[8] >> 15, 19); /* at most 19*(2^15-1) = 622573 */ t[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { uint64_t w; w = (uint64_t)t[i] + (uint64_t)cc + MUL31(t[i + 9], 622592); t[i] = (uint32_t)w & 0x3FFFFFFF; cc = (uint32_t)(w >> 30); /* at most 622592 */ } /* * Original product was up to (2^256-1)^2, i.e. a 512-bit integer. * This was split into two parts (upper of 257 bits, lower of 255 * bits), and the upper was added to the lower with a factor 19, * which means that the intermediate value is less than 77*2^255 * (19*2^257 + 2^255). Therefore, the extra bits "t[8] >> 15" are * less than 77, and the initial carry cc is at most 76*19 = 1444. */ cc = MUL15(t[8] >> 15, 19); t[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { uint32_t z; z = t[i] + cc; d[i] = z & 0x3FFFFFFF; cc = z >> 30; } /* * Final result is at most 2^255 + 1443. In particular, the last * carry is necessarily 0, since t[8] was truncated to 15 bits. */ } /* * Perform a squaring of an integer modulo 2^255-19. * Operands are arrays of 9 words, each containing 30 bits of data, in * little-endian order. Input value may be up to 2^256-1; on output, value * fits on 256 bits and is lower than twice the modulus. */ static void _src_ec_ec_c25519_m31_cf255_square(uint32_t *d, const uint32_t *a) { uint32_t t[18], cc; int i; /* * Compute raw squaring. All result words fit in 30 bits * each; upper word (t[17]) must fit on 2 bits, since the square * of a 256-bit integers must fit on 512 bits. */ _src_ec_ec_c25519_m31_csquare9(t, a); /* * Modular reduction: each high word is added where necessary. * See _src_ec_ec_c25519_m31_cf255_mul() for details on the reduction and carry limits. */ cc = MUL15(t[8] >> 15, 19); t[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { uint64_t w; w = (uint64_t)t[i] + (uint64_t)cc + MUL31(t[i + 9], 622592); t[i] = (uint32_t)w & 0x3FFFFFFF; cc = (uint32_t)(w >> 30); } cc = MUL15(t[8] >> 15, 19); t[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { uint32_t z; z = t[i] + cc; d[i] = z & 0x3FFFFFFF; cc = z >> 30; } } /* * Add two values in F255. Partial reduction is performed (down to less * than twice the modulus). */ static void _src_ec_ec_c25519_m31_cf255_add(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * Since operand words fit on 30 bits, we can use 32-bit * variables throughout. */ int i; uint32_t cc, w; cc = 0; for (i = 0; i < 9; i ++) { w = a[i] + b[i] + cc; d[i] = w & 0x3FFFFFFF; cc = w >> 30; } cc = MUL15(w >> 15, 19); d[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { w = d[i] + cc; d[i] = w & 0x3FFFFFFF; cc = w >> 30; } } /* * Subtract one value from another in F255. Partial reduction is * performed (down to less than twice the modulus). */ static void _src_ec_ec_c25519_m31_cf255_sub(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * We actually compute a - b + 2*p, so that the final value is * necessarily positive. */ int i; uint32_t cc, w; cc = (uint32_t)-38; for (i = 0; i < 9; i ++) { w = a[i] - b[i] + cc; d[i] = w & 0x3FFFFFFF; cc = ARSH(w, 30); } cc = MUL15((w + 0x10000) >> 15, 19); d[8] &= 0x7FFF; for (i = 0; i < 9; i ++) { w = d[i] + cc; d[i] = w & 0x3FFFFFFF; cc = w >> 30; } } /* * Multiply an integer by the 'A24' constant (121665). Partial reduction * is performed (down to less than twice the modulus). */ static void _src_ec_ec_c25519_m31_cf255_mul_a24(uint32_t *d, const uint32_t *a) { int i; uint64_t w; uint32_t cc; /* * a[] is over 256 bits, thus a[8] has length at most 16 bits. * We single out the processing of the last word: intermediate * value w is up to 121665*2^16, yielding a carry for the next * loop of at most 19*(121665*2^16/2^15) = 4623289. */ cc = 0; for (i = 0; i < 8; i ++) { w = MUL31(a[i], 121665) + (uint64_t)cc; d[i] = (uint32_t)w & 0x3FFFFFFF; cc = (uint32_t)(w >> 30); } w = MUL31(a[8], 121665) + (uint64_t)cc; d[8] = (uint32_t)w & 0x7FFF; cc = MUL15((uint32_t)(w >> 15), 19); for (i = 0; i < 9; i ++) { uint32_t z; z = d[i] + cc; d[i] = z & 0x3FFFFFFF; cc = z >> 30; } } static const unsigned char _src_ec_ec_c25519_m31_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_m31_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_m31_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m31_cGEN; } static const unsigned char * _src_ec_ec_c25519_m31_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m31_cORDER; } static size_t _src_ec_ec_c25519_m31_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } static void _src_ec_ec_c25519_m31_ccswap(uint32_t *a, uint32_t *b, uint32_t ctl) { int i; ctl = -ctl; for (i = 0; i < 9; i ++) { uint32_t aw, bw, tw; aw = a[i]; bw = b[i]; tw = ctl & (aw ^ bw); a[i] = aw ^ tw; b[i] = bw ^ tw; } } static uint32_t _src_ec_ec_c25519_m31_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { uint32_t x1[9], x2[9], x3[9], z2[9], z3[9]; uint32_t a[9], aa[9], b[9], bb[9]; uint32_t c[9], d[9], e[9], da[9], cb[9]; unsigned char k[32]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared. */ if (Glen != 32 || kblen > 32) { return 0; } G[31] &= 0x7F; /* * Initialise variables x1, x2, z2, x3 and z3. We set all of them * into Montgomery representation. */ x1[8] = le8_to_le30(x1, G, 32); memcpy(x3, x1, sizeof x1); memset(z2, 0, sizeof z2); memset(x2, 0, sizeof x2); x2[0] = 1; memset(z3, 0, sizeof z3); z3[0] = 1; memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; /* obsolete print_int("x1", x1); */ swap = 0; for (i = 254; i >= 0; i --) { uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_m31_ccswap(x2, x3, swap); _src_ec_ec_c25519_m31_ccswap(z2, z3, swap); swap = kt; /* obsolete print_int("x2", x2); print_int("z2", z2); print_int("x3", x3); print_int("z3", z3); */ _src_ec_ec_c25519_m31_cf255_add(a, x2, z2); _src_ec_ec_c25519_m31_cf255_square(aa, a); _src_ec_ec_c25519_m31_cf255_sub(b, x2, z2); _src_ec_ec_c25519_m31_cf255_square(bb, b); _src_ec_ec_c25519_m31_cf255_sub(e, aa, bb); _src_ec_ec_c25519_m31_cf255_add(c, x3, z3); _src_ec_ec_c25519_m31_cf255_sub(d, x3, z3); _src_ec_ec_c25519_m31_cf255_mul(da, d, a); _src_ec_ec_c25519_m31_cf255_mul(cb, c, b); /* obsolete print_int("a ", a); print_int("aa", aa); print_int("b ", b); print_int("bb", bb); print_int("e ", e); print_int("c ", c); print_int("d ", d); print_int("da", da); print_int("cb", cb); */ _src_ec_ec_c25519_m31_cf255_add(x3, da, cb); _src_ec_ec_c25519_m31_cf255_square(x3, x3); _src_ec_ec_c25519_m31_cf255_sub(z3, da, cb); _src_ec_ec_c25519_m31_cf255_square(z3, z3); _src_ec_ec_c25519_m31_cf255_mul(z3, z3, x1); _src_ec_ec_c25519_m31_cf255_mul(x2, aa, bb); _src_ec_ec_c25519_m31_cf255_mul_a24(z2, e); _src_ec_ec_c25519_m31_cf255_add(z2, z2, aa); _src_ec_ec_c25519_m31_cf255_mul(z2, e, z2); /* obsolete print_int("x2", x2); print_int("z2", z2); print_int("x3", x3); print_int("z3", z3); */ } _src_ec_ec_c25519_m31_ccswap(x2, x3, swap); _src_ec_ec_c25519_m31_ccswap(z2, z3, swap); /* * Inverse z2 with a modular exponentiation. This is a simple * square-and-multiply algorithm; we mutualise most non-squarings * since the exponent contains almost only ones. */ memcpy(a, z2, sizeof z2); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_m31_cf255_square(a, a); _src_ec_ec_c25519_m31_cf255_mul(a, a, z2); } memcpy(b, a, sizeof a); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_m31_cf255_square(b, b); } _src_ec_ec_c25519_m31_cf255_mul(b, b, a); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_m31_cf255_square(b, b); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_m31_cf255_mul(b, z2, b); } } _src_ec_ec_c25519_m31_cf255_mul(x2, x2, b); _src_ec_ec_c25519_m31_creduce_final_f255(x2); le30_to_le8(G, 32, x2); return 1; } static size_t _src_ec_ec_c25519_m31_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_m31_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_m31_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_m31_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_m31 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_m31_capi_generator, &_src_ec_ec_c25519_m31_capi_order, &_src_ec_ec_c25519_m31_capi_xoff, &_src_ec_ec_c25519_m31_capi_mul, &_src_ec_ec_c25519_m31_capi_mulgen, &_src_ec_ec_c25519_m31_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_UMUL128 #include #endif static const unsigned char _src_ec_ec_c25519_m62_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_m62_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_m62_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m62_cGEN; } static const unsigned char * _src_ec_ec_c25519_m62_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m62_cORDER; } static size_t _src_ec_ec_c25519_m62_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } /* * A field element is encoded as five 64-bit integers, in basis 2^51. * Limbs may be occasionally larger than 2^51, to save on carry * propagation costs. */ #define MASK51 (((uint64_t)1 << 51) - (uint64_t)1) /* * Swap two field elements, conditionally on a flag. */ static inline void _src_ec_ec_c25519_m62_cf255__src_ec_ec_c25519_m62_ccswap(uint64_t *a, uint64_t *b, uint32_t ctl) { uint64_t m, w; m = -(uint64_t)ctl; w = m & (a[0] ^ b[0]); a[0] ^= w; b[0] ^= w; w = m & (a[1] ^ b[1]); a[1] ^= w; b[1] ^= w; w = m & (a[2] ^ b[2]); a[2] ^= w; b[2] ^= w; w = m & (a[3] ^ b[3]); a[3] ^= w; b[3] ^= w; w = m & (a[4] ^ b[4]); a[4] ^= w; b[4] ^= w; } /* * Addition with no carry propagation. Limbs double in size. */ static inline void _src_ec_ec_c25519_m62_cf255_add(uint64_t *d, const uint64_t *a, const uint64_t *b) { d[0] = a[0] + b[0]; d[1] = a[1] + b[1]; d[2] = a[2] + b[2]; d[3] = a[3] + b[3]; d[4] = a[4] + b[4]; } /* * Subtraction. * On input, limbs must fit on 60 bits each. On output, result is * partially reduced, with max value 2^255+19456; moreover, all * limbs will fit on 51 bits, except the low limb, which may have * value up to 2^51+19455. */ static inline void _src_ec_ec_c25519_m62_cf255_sub(uint64_t *d, const uint64_t *a, const uint64_t *b) { uint64_t cc, w; /* * We compute d = (2^255-19)*1024 + a - b. Since the limbs * fit on 60 bits, the maximum value of operands are slightly * more than 2^264, but much less than 2^265-19456. This * ensures that the result is positive. */ /* * Initial carry is 19456, since we add 2^265-19456. Each * individual subtraction may yield a carry up to 513. */ w = a[0] - b[0] - 19456; d[0] = w & MASK51; cc = -(w >> 51) & 0x3FF; w = a[1] - b[1] - cc; d[1] = w & MASK51; cc = -(w >> 51) & 0x3FF; w = a[2] - b[2] - cc; d[2] = w & MASK51; cc = -(w >> 51) & 0x3FF; w = a[3] - b[3] - cc; d[3] = w & MASK51; cc = -(w >> 51) & 0x3FF; d[4] = ((uint64_t)1 << 61) + a[4] - b[4] - cc; /* * Partial reduction. The intermediate result may be up to * slightly above 2^265, but less than 2^265+2^255. When we * truncate to 255 bits, the upper bits will be at most 1024. */ d[0] += 19 * (d[4] >> 51); d[4] &= MASK51; } /* * UMUL51(hi, lo, x, y) computes: * * hi = floor((x * y) / (2^51)) * lo = x * y mod 2^51 * * Note that lo < 2^51, but "hi" may be larger, if the input operands are * larger. */ #if BR_INT128 #define UMUL51(hi, lo, x, y) do { \ unsigned __int128 umul_tmp; \ umul_tmp = (unsigned __int128)(x) * (unsigned __int128)(y); \ (hi) = (uint64_t)(umul_tmp >> 51); \ (lo) = (uint64_t)umul_tmp & MASK51; \ } while (0) #elif BR_UMUL128 #define UMUL51(hi, lo, x, y) do { \ uint64_t umul_hi, umul_lo; \ umul_lo = _umul128((x), (y), &umul_hi); \ (hi) = (umul_hi << 13) | (umul_lo >> 51); \ (lo) = umul_lo & MASK51; \ } while (0) #endif /* * Multiplication. * On input, limbs must fit on 54 bits each. * On output, limb 0 is at most 2^51 + 155647, and other limbs fit * on 51 bits each. */ static inline void _src_ec_ec_c25519_m62_cf255_mul(uint64_t *d, uint64_t *a, uint64_t *b) { uint64_t t[10], hi, lo, w, cc; /* * Perform cross products, accumulating values without carry * propagation. * * Since input limbs fit on 54 bits each, each individual * UMUL51 will produce a "hi" of less than 2^57. The maximum * sum will be at most 5*(2^57-1) + 4*(2^51-1) (for t[5]), * i.e. less than 324*2^51. */ UMUL51(t[1], t[0], a[0], b[0]); UMUL51(t[2], lo, a[1], b[0]); t[1] += lo; UMUL51(hi, lo, a[0], b[1]); t[1] += lo; t[2] += hi; UMUL51(t[3], lo, a[2], b[0]); t[2] += lo; UMUL51(hi, lo, a[1], b[1]); t[2] += lo; t[3] += hi; UMUL51(hi, lo, a[0], b[2]); t[2] += lo; t[3] += hi; UMUL51(t[4], lo, a[3], b[0]); t[3] += lo; UMUL51(hi, lo, a[2], b[1]); t[3] += lo; t[4] += hi; UMUL51(hi, lo, a[1], b[2]); t[3] += lo; t[4] += hi; UMUL51(hi, lo, a[0], b[3]); t[3] += lo; t[4] += hi; UMUL51(t[5], lo, a[4], b[0]); t[4] += lo; UMUL51(hi, lo, a[3], b[1]); t[4] += lo; t[5] += hi; UMUL51(hi, lo, a[2], b[2]); t[4] += lo; t[5] += hi; UMUL51(hi, lo, a[1], b[3]); t[4] += lo; t[5] += hi; UMUL51(hi, lo, a[0], b[4]); t[4] += lo; t[5] += hi; UMUL51(t[6], lo, a[4], b[1]); t[5] += lo; UMUL51(hi, lo, a[3], b[2]); t[5] += lo; t[6] += hi; UMUL51(hi, lo, a[2], b[3]); t[5] += lo; t[6] += hi; UMUL51(hi, lo, a[1], b[4]); t[5] += lo; t[6] += hi; UMUL51(t[7], lo, a[4], b[2]); t[6] += lo; UMUL51(hi, lo, a[3], b[3]); t[6] += lo; t[7] += hi; UMUL51(hi, lo, a[2], b[4]); t[6] += lo; t[7] += hi; UMUL51(t[8], lo, a[4], b[3]); t[7] += lo; UMUL51(hi, lo, a[3], b[4]); t[7] += lo; t[8] += hi; UMUL51(t[9], lo, a[4], b[4]); t[8] += lo; /* * The upper words t[5]..t[9] are folded back into the lower * words, using the rule that 2^255 = 19 in the field. * * Since each t[i] is less than 324*2^51, the additions below * will yield less than 6480*2^51 in each limb; this fits in * 64 bits (6480*2^51 < 8192*2^51 = 2^64), hence there is * no overflow. */ t[0] += 19 * t[5]; t[1] += 19 * t[6]; t[2] += 19 * t[7]; t[3] += 19 * t[8]; t[4] += 19 * t[9]; /* * Propagate carries. */ w = t[0]; d[0] = w & MASK51; cc = w >> 51; w = t[1] + cc; d[1] = w & MASK51; cc = w >> 51; w = t[2] + cc; d[2] = w & MASK51; cc = w >> 51; w = t[3] + cc; d[3] = w & MASK51; cc = w >> 51; w = t[4] + cc; d[4] = w & MASK51; cc = w >> 51; /* * Since the limbs were 64-bit values, the top carry is at * most 8192 (in practice, that cannot be reached). We simply * performed a partial reduction. */ d[0] += 19 * cc; } /* * Multiplication by A24 = 121665. * Input must have limbs of 60 bits at most. */ static inline void _src_ec_ec_c25519_m62_cf255_mul_a24(uint64_t *d, const uint64_t *a) { uint64_t t[5], cc, w; /* * 121665 = 15 * 8111. We first multiply by 15, with carry * propagation and partial reduction. */ w = a[0] * 15; t[0] = w & MASK51; cc = w >> 51; w = a[1] * 15 + cc; t[1] = w & MASK51; cc = w >> 51; w = a[2] * 15 + cc; t[2] = w & MASK51; cc = w >> 51; w = a[3] * 15 + cc; t[3] = w & MASK51; cc = w >> 51; w = a[4] * 15 + cc; t[4] = w & MASK51; t[0] += 19 * (w >> 51); /* * Then multiplication by 8111. At that point, we known that * t[0] is less than 2^51 + 19*8192, and other limbs are less * than 2^51; thus, there will be no overflow. */ w = t[0] * 8111; d[0] = w & MASK51; cc = w >> 51; w = t[1] * 8111 + cc; d[1] = w & MASK51; cc = w >> 51; w = t[2] * 8111 + cc; d[2] = w & MASK51; cc = w >> 51; w = t[3] * 8111 + cc; d[3] = w & MASK51; cc = w >> 51; w = t[4] * 8111 + cc; d[4] = w & MASK51; d[0] += 19 * (w >> 51); } /* * Finalize reduction. * On input, limbs must fit on 51 bits, except possibly the low limb, * which may be slightly above 2^51. */ static inline void _src_ec_ec_c25519_m62_cf255_final_reduce(uint64_t *a) { uint64_t t[5], cc, w; /* * We add 19. If the result (in t[]) is below 2^255, then a[] * is already less than 2^255-19, thus already reduced. * Otherwise, we subtract 2^255 from t[], in which case we * have t = a - (2^255-19), and that's our result. */ w = a[0] + 19; t[0] = w & MASK51; cc = w >> 51; w = a[1] + cc; t[1] = w & MASK51; cc = w >> 51; w = a[2] + cc; t[2] = w & MASK51; cc = w >> 51; w = a[3] + cc; t[3] = w & MASK51; cc = w >> 51; w = a[4] + cc; t[4] = w & MASK51; cc = w >> 51; /* * The bit 255 of t is in cc. If that bit is 0, when a[] must * be unchanged; otherwise, it must be replaced with t[]. */ cc = -cc; a[0] ^= cc & (a[0] ^ t[0]); a[1] ^= cc & (a[1] ^ t[1]); a[2] ^= cc & (a[2] ^ t[2]); a[3] ^= cc & (a[3] ^ t[3]); a[4] ^= cc & (a[4] ^ t[4]); } static uint32_t _src_ec_ec_c25519_m62_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { unsigned char k[32]; uint64_t x1[5], x2[5], z2[5], x3[5], z3[5]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. */ if (Glen != 32 || kblen > 32) { return 0; } /* * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared; the "& MASK51" in the initialization for * x1[4] clears that bit. */ x1[0] = br_dec64le(&G[0]) & MASK51; x1[1] = (br_dec64le(&G[6]) >> 3) & MASK51; x1[2] = (br_dec64le(&G[12]) >> 6) & MASK51; x1[3] = (br_dec64le(&G[19]) >> 1) & MASK51; x1[4] = (br_dec64le(&G[24]) >> 12) & MASK51; /* * We can use memset() to clear values, because exact-width types * like uint64_t are guaranteed to have no padding bits or * trap representations. */ memset(x2, 0, sizeof x2); x2[0] = 1; memset(z2, 0, sizeof z2); memcpy(x3, x1, sizeof x1); memcpy(z3, x2, sizeof x2); /* * The multiplier is provided in big-endian notation, and * possibly shorter than 32 bytes. */ memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; swap = 0; for (i = 254; i >= 0; i --) { uint64_t a[5], aa[5], b[5], bb[5], e[5]; uint64_t c[5], d[5], da[5], cb[5]; uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_m62_cf255__src_ec_ec_c25519_m62_ccswap(x2, x3, swap); _src_ec_ec_c25519_m62_cf255__src_ec_ec_c25519_m62_ccswap(z2, z3, swap); swap = kt; /* * At that point, limbs of x_2 and z_2 are assumed to fit * on at most 52 bits each. * * Each _src_ec_ec_c25519_m62_cf255_add() adds one bit to the maximum range of * the values, but _src_ec_ec_c25519_m62_cf255_sub() and _src_ec_ec_c25519_m62_cf255_mul() bring back * the limbs into 52 bits. All _src_ec_ec_c25519_m62_cf255_add() outputs are * used only as inputs for _src_ec_ec_c25519_m62_cf255_mul(), which ensures * that limbs remain in the proper range. */ /* A = x_2 + z_2 -- limbs fit on 53 bits each */ _src_ec_ec_c25519_m62_cf255_add(a, x2, z2); /* AA = A^2 */ _src_ec_ec_c25519_m62_cf255_mul(aa, a, a); /* B = x_2 - z_2 */ _src_ec_ec_c25519_m62_cf255_sub(b, x2, z2); /* BB = B^2 */ _src_ec_ec_c25519_m62_cf255_mul(bb, b, b); /* E = AA - BB */ _src_ec_ec_c25519_m62_cf255_sub(e, aa, bb); /* C = x_3 + z_3 -- limbs fit on 53 bits each */ _src_ec_ec_c25519_m62_cf255_add(c, x3, z3); /* D = x_3 - z_3 */ _src_ec_ec_c25519_m62_cf255_sub(d, x3, z3); /* DA = D * A */ _src_ec_ec_c25519_m62_cf255_mul(da, d, a); /* CB = C * B */ _src_ec_ec_c25519_m62_cf255_mul(cb, c, b); /* x_3 = (DA + CB)^2 */ _src_ec_ec_c25519_m62_cf255_add(x3, da, cb); _src_ec_ec_c25519_m62_cf255_mul(x3, x3, x3); /* z_3 = x_1 * (DA - CB)^2 */ _src_ec_ec_c25519_m62_cf255_sub(z3, da, cb); _src_ec_ec_c25519_m62_cf255_mul(z3, z3, z3); _src_ec_ec_c25519_m62_cf255_mul(z3, x1, z3); /* x_2 = AA * BB */ _src_ec_ec_c25519_m62_cf255_mul(x2, aa, bb); /* z_2 = E * (AA + a24 * E) */ _src_ec_ec_c25519_m62_cf255_mul_a24(z2, e); _src_ec_ec_c25519_m62_cf255_add(z2, aa, z2); _src_ec_ec_c25519_m62_cf255_mul(z2, e, z2); } _src_ec_ec_c25519_m62_cf255__src_ec_ec_c25519_m62_ccswap(x2, x3, swap); _src_ec_ec_c25519_m62_cf255__src_ec_ec_c25519_m62_ccswap(z2, z3, swap); /* * Compute 1/z2 = z2^(p-2). Since p = 2^255-19, we can mutualize * most non-squarings. We use x1 and x3, now useless, as temporaries. */ memcpy(x1, z2, sizeof z2); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_m62_cf255_mul(x1, x1, x1); _src_ec_ec_c25519_m62_cf255_mul(x1, x1, z2); } memcpy(x3, x1, sizeof x1); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_m62_cf255_mul(x3, x3, x3); } _src_ec_ec_c25519_m62_cf255_mul(x3, x3, x1); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_m62_cf255_mul(x3, x3, x3); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_m62_cf255_mul(x3, z2, x3); } } /* * Compute x2/z2. We have 1/z2 in x3. */ _src_ec_ec_c25519_m62_cf255_mul(x2, x2, x3); _src_ec_ec_c25519_m62_cf255_final_reduce(x2); /* * Encode the final x2 value in little-endian. We first assemble * the limbs into 64-bit values. */ x2[0] |= x2[1] << 51; x2[1] = (x2[1] >> 13) | (x2[2] << 38); x2[2] = (x2[2] >> 26) | (x2[3] << 25); x2[3] = (x2[3] >> 39) | (x2[4] << 12); br_enc64le(G, x2[0]); br_enc64le(G + 8, x2[1]); br_enc64le(G + 16, x2[2]); br_enc64le(G + 24, x2[3]); return 1; } static size_t _src_ec_ec_c25519_m62_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_m62_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_m62_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_m62_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_m62 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_m62_capi_generator, &_src_ec_ec_c25519_m62_capi_order, &_src_ec_ec_c25519_m62_capi_xoff, &_src_ec_ec_c25519_m62_capi_mul, &_src_ec_ec_c25519_m62_capi_mulgen, &_src_ec_ec_c25519_m62_capi_muladd }; /* see bearssl_ec.h */ const br_ec_impl * br_ec_c25519_m62_get(void) { return &br_ec_c25519_m62; } #else /* see bearssl_ec.h */ const br_ec_impl * br_ec_c25519_m62_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_UMUL128 #include #endif static const unsigned char _src_ec_ec_c25519_m64_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_c25519_m64_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const unsigned char * _src_ec_ec_c25519_m64_capi_generator(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m64_cGEN; } static const unsigned char * _src_ec_ec_c25519_m64_capi_order(int curve, size_t *len) { (void)curve; *len = 32; return _src_ec_ec_c25519_m64_cORDER; } static size_t _src_ec_ec_c25519_m64_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 0; } /* * A field element is encoded as four 64-bit integers, in basis 2^63. * Operations return partially reduced values, which may range up to * 2^255+37. */ #define MASK63 (((uint64_t)1 << 63) - (uint64_t)1) /* * Swap two field elements, conditionally on a flag. */ static inline void _src_ec_ec_c25519_m64_cf255__src_ec_ec_c25519_m64_ccswap(uint64_t *a, uint64_t *b, uint32_t ctl) { uint64_t m, w; m = -(uint64_t)ctl; w = m & (a[0] ^ b[0]); a[0] ^= w; b[0] ^= w; w = m & (a[1] ^ b[1]); a[1] ^= w; b[1] ^= w; w = m & (a[2] ^ b[2]); a[2] ^= w; b[2] ^= w; w = m & (a[3] ^ b[3]); a[3] ^= w; b[3] ^= w; } /* * Addition in the field. */ static inline void _src_ec_ec_c25519_m64_cf255_add(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 uint64_t t0, t1, t2, t3, cc; unsigned __int128 z; z = (unsigned __int128)a[0] + (unsigned __int128)b[0]; t0 = (uint64_t)z; z = (unsigned __int128)a[1] + (unsigned __int128)b[1] + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)a[2] + (unsigned __int128)b[2] + (z >> 64); t2 = (uint64_t)z; z = (unsigned __int128)a[3] + (unsigned __int128)b[3] + (z >> 64); t3 = (uint64_t)z & MASK63; cc = (uint64_t)(z >> 63); /* * Since operands are at most 2^255+37, the sum is at most * 2^256+74; thus, the carry cc is equal to 0, 1 or 2. * * We use: 2^255 = 19 mod p. * Since we add 0, 19 or 38 to a value that fits on 255 bits, * the result is at most 2^255+37. */ z = (unsigned __int128)t0 + (unsigned __int128)(19 * cc); d[0] = (uint64_t)z; z = (unsigned __int128)t1 + (z >> 64); d[1] = (uint64_t)z; z = (unsigned __int128)t2 + (z >> 64); d[2] = (uint64_t)z; d[3] = t3 + (uint64_t)(z >> 64); #elif BR_UMUL128 uint64_t t0, t1, t2, t3, cc; unsigned char k; k = _addcarry_u64(0, a[0], b[0], &t0); k = _addcarry_u64(k, a[1], b[1], &t1); k = _addcarry_u64(k, a[2], b[2], &t2); k = _addcarry_u64(k, a[3], b[3], &t3); cc = (k << 1) + (t3 >> 63); t3 &= MASK63; /* * Since operands are at most 2^255+37, the sum is at most * 2^256+74; thus, the carry cc is equal to 0, 1 or 2. * * We use: 2^255 = 19 mod p. * Since we add 0, 19 or 38 to a value that fits on 255 bits, * the result is at most 2^255+37. */ k = _addcarry_u64(0, t0, 19 * cc, &d[0]); k = _addcarry_u64(k, t1, 0, &d[1]); k = _addcarry_u64(k, t2, 0, &d[2]); (void)_addcarry_u64(k, t3, 0, &d[3]); #endif } /* * Subtraction. */ static inline void _src_ec_ec_c25519_m64_cf255_sub(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 /* * We compute t = 2^256 - 38 + a - b, which is necessarily * positive but lower than 2^256 + 2^255, since a <= 2^255 + 37 * and b <= 2^255 + 37. We then subtract 0, p or 2*p, depending * on the two upper bits of t (bits 255 and 256). */ uint64_t t0, t1, t2, t3, t4, cc; unsigned __int128 z; z = (unsigned __int128)a[0] - (unsigned __int128)b[0] - 38; t0 = (uint64_t)z; cc = -(uint64_t)(z >> 64); z = (unsigned __int128)a[1] - (unsigned __int128)b[1] - (unsigned __int128)cc; t1 = (uint64_t)z; cc = -(uint64_t)(z >> 64); z = (unsigned __int128)a[2] - (unsigned __int128)b[2] - (unsigned __int128)cc; t2 = (uint64_t)z; cc = -(uint64_t)(z >> 64); z = (unsigned __int128)a[3] - (unsigned __int128)b[3] - (unsigned __int128)cc; t3 = (uint64_t)z; t4 = 1 + (uint64_t)(z >> 64); /* * We have a 257-bit result. The two top bits can be 00, 01 or 10, * but not 11 (value t <= 2^256 - 38 + 2^255 + 37 = 2^256 + 2^255 - 1). * Therefore, we can truncate to 255 bits, and add 0, 19 or 38. * This guarantees that the result is at most 2^255+37. */ cc = (38 & -t4) + (19 & -(t3 >> 63)); t3 &= MASK63; z = (unsigned __int128)t0 + (unsigned __int128)cc; d[0] = (uint64_t)z; z = (unsigned __int128)t1 + (z >> 64); d[1] = (uint64_t)z; z = (unsigned __int128)t2 + (z >> 64); d[2] = (uint64_t)z; d[3] = t3 + (uint64_t)(z >> 64); #elif BR_UMUL128 /* * We compute t = 2^256 - 38 + a - b, which is necessarily * positive but lower than 2^256 + 2^255, since a <= 2^255 + 37 * and b <= 2^255 + 37. We then subtract 0, p or 2*p, depending * on the two upper bits of t (bits 255 and 256). */ uint64_t t0, t1, t2, t3, t4; unsigned char k; k = _subborrow_u64(0, a[0], b[0], &t0); k = _subborrow_u64(k, a[1], b[1], &t1); k = _subborrow_u64(k, a[2], b[2], &t2); k = _subborrow_u64(k, a[3], b[3], &t3); (void)_subborrow_u64(k, 1, 0, &t4); k = _subborrow_u64(0, t0, 38, &t0); k = _subborrow_u64(k, t1, 0, &t1); k = _subborrow_u64(k, t2, 0, &t2); k = _subborrow_u64(k, t3, 0, &t3); (void)_subborrow_u64(k, t4, 0, &t4); /* * We have a 257-bit result. The two top bits can be 00, 01 or 10, * but not 11 (value t <= 2^256 - 38 + 2^255 + 37 = 2^256 + 2^255 - 1). * Therefore, we can truncate to 255 bits, and add 0, 19 or 38. * This guarantees that the result is at most 2^255+37. */ t4 = (38 & -t4) + (19 & -(t3 >> 63)); t3 &= MASK63; k = _addcarry_u64(0, t0, t4, &d[0]); k = _addcarry_u64(k, t1, 0, &d[1]); k = _addcarry_u64(k, t2, 0, &d[2]); (void)_addcarry_u64(k, t3, 0, &d[3]); #endif } /* * Multiplication. */ static inline void _src_ec_ec_c25519_m64_cf255_mul(uint64_t *d, uint64_t *a, uint64_t *b) { #if BR_INT128 unsigned __int128 z; uint64_t t0, t1, t2, t3, t4, t5, t6, t7, th; /* * Compute the product a*b over plain integers. */ z = (unsigned __int128)a[0] * (unsigned __int128)b[0]; t0 = (uint64_t)z; z = (unsigned __int128)a[0] * (unsigned __int128)b[1] + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)a[0] * (unsigned __int128)b[2] + (z >> 64); t2 = (uint64_t)z; z = (unsigned __int128)a[0] * (unsigned __int128)b[3] + (z >> 64); t3 = (uint64_t)z; t4 = (uint64_t)(z >> 64); z = (unsigned __int128)a[1] * (unsigned __int128)b[0] + (unsigned __int128)t1; t1 = (uint64_t)z; z = (unsigned __int128)a[1] * (unsigned __int128)b[1] + (unsigned __int128)t2 + (z >> 64); t2 = (uint64_t)z; z = (unsigned __int128)a[1] * (unsigned __int128)b[2] + (unsigned __int128)t3 + (z >> 64); t3 = (uint64_t)z; z = (unsigned __int128)a[1] * (unsigned __int128)b[3] + (unsigned __int128)t4 + (z >> 64); t4 = (uint64_t)z; t5 = (uint64_t)(z >> 64); z = (unsigned __int128)a[2] * (unsigned __int128)b[0] + (unsigned __int128)t2; t2 = (uint64_t)z; z = (unsigned __int128)a[2] * (unsigned __int128)b[1] + (unsigned __int128)t3 + (z >> 64); t3 = (uint64_t)z; z = (unsigned __int128)a[2] * (unsigned __int128)b[2] + (unsigned __int128)t4 + (z >> 64); t4 = (uint64_t)z; z = (unsigned __int128)a[2] * (unsigned __int128)b[3] + (unsigned __int128)t5 + (z >> 64); t5 = (uint64_t)z; t6 = (uint64_t)(z >> 64); z = (unsigned __int128)a[3] * (unsigned __int128)b[0] + (unsigned __int128)t3; t3 = (uint64_t)z; z = (unsigned __int128)a[3] * (unsigned __int128)b[1] + (unsigned __int128)t4 + (z >> 64); t4 = (uint64_t)z; z = (unsigned __int128)a[3] * (unsigned __int128)b[2] + (unsigned __int128)t5 + (z >> 64); t5 = (uint64_t)z; z = (unsigned __int128)a[3] * (unsigned __int128)b[3] + (unsigned __int128)t6 + (z >> 64); t6 = (uint64_t)z; t7 = (uint64_t)(z >> 64); /* * Modulo p, we have: * * 2^255 = 19 * 2^510 = 19*19 = 361 * * We split the intermediate t into three parts, in basis * 2^255. The low one will be in t0..t3; the middle one in t4..t7. * The upper one can only be a single bit (th), since the * multiplication operands are at most 2^255+37 each. */ th = t7 >> 62; t7 = ((t7 << 1) | (t6 >> 63)) & MASK63; t6 = (t6 << 1) | (t5 >> 63); t5 = (t5 << 1) | (t4 >> 63); t4 = (t4 << 1) | (t3 >> 63); t3 &= MASK63; /* * Multiply the middle part (t4..t7) by 19. We truncate it to * 255 bits; the extra bits will go along with th. */ z = (unsigned __int128)t4 * 19; t4 = (uint64_t)z; z = (unsigned __int128)t5 * 19 + (z >> 64); t5 = (uint64_t)z; z = (unsigned __int128)t6 * 19 + (z >> 64); t6 = (uint64_t)z; z = (unsigned __int128)t7 * 19 + (z >> 64); t7 = (uint64_t)z & MASK63; th = (361 & -th) + (19 * (uint64_t)(z >> 63)); /* * Add elements together. * At this point: * t0..t3 fits on 255 bits. * t4..t7 fits on 255 bits. * th <= 361 + 342 = 703. */ z = (unsigned __int128)t0 + (unsigned __int128)t4 + (unsigned __int128)th; t0 = (uint64_t)z; z = (unsigned __int128)t1 + (unsigned __int128)t5 + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)t2 + (unsigned __int128)t6 + (z >> 64); t2 = (uint64_t)z; z = (unsigned __int128)t3 + (unsigned __int128)t7 + (z >> 64); t3 = (uint64_t)z & MASK63; th = (uint64_t)(z >> 63); /* * Since the sum is at most 2^256 + 703, the two upper bits, in th, * can only have value 0, 1 or 2. We just add th*19, which * guarantees a result of at most 2^255+37. */ z = (unsigned __int128)t0 + (19 * th); d[0] = (uint64_t)z; z = (unsigned __int128)t1 + (z >> 64); d[1] = (uint64_t)z; z = (unsigned __int128)t2 + (z >> 64); d[2] = (uint64_t)z; d[3] = t3 + (uint64_t)(z >> 64); #elif BR_UMUL128 uint64_t t0, t1, t2, t3, t4, t5, t6, t7, th; uint64_t h0, h1, h2, h3; unsigned char k; /* * Compute the product a*b over plain integers. */ t0 = _umul128(a[0], b[0], &h0); t1 = _umul128(a[0], b[1], &h1); k = _addcarry_u64(0, t1, h0, &t1); t2 = _umul128(a[0], b[2], &h2); k = _addcarry_u64(k, t2, h1, &t2); t3 = _umul128(a[0], b[3], &h3); k = _addcarry_u64(k, t3, h2, &t3); (void)_addcarry_u64(k, h3, 0, &t4); k = _addcarry_u64(0, _umul128(a[1], b[0], &h0), t1, &t1); k = _addcarry_u64(k, _umul128(a[1], b[1], &h1), t2, &t2); k = _addcarry_u64(k, _umul128(a[1], b[2], &h2), t3, &t3); k = _addcarry_u64(k, _umul128(a[1], b[3], &h3), t4, &t4); t5 = k; k = _addcarry_u64(0, t2, h0, &t2); k = _addcarry_u64(k, t3, h1, &t3); k = _addcarry_u64(k, t4, h2, &t4); (void)_addcarry_u64(k, t5, h3, &t5); k = _addcarry_u64(0, _umul128(a[2], b[0], &h0), t2, &t2); k = _addcarry_u64(k, _umul128(a[2], b[1], &h1), t3, &t3); k = _addcarry_u64(k, _umul128(a[2], b[2], &h2), t4, &t4); k = _addcarry_u64(k, _umul128(a[2], b[3], &h3), t5, &t5); t6 = k; k = _addcarry_u64(0, t3, h0, &t3); k = _addcarry_u64(k, t4, h1, &t4); k = _addcarry_u64(k, t5, h2, &t5); (void)_addcarry_u64(k, t6, h3, &t6); k = _addcarry_u64(0, _umul128(a[3], b[0], &h0), t3, &t3); k = _addcarry_u64(k, _umul128(a[3], b[1], &h1), t4, &t4); k = _addcarry_u64(k, _umul128(a[3], b[2], &h2), t5, &t5); k = _addcarry_u64(k, _umul128(a[3], b[3], &h3), t6, &t6); t7 = k; k = _addcarry_u64(0, t4, h0, &t4); k = _addcarry_u64(k, t5, h1, &t5); k = _addcarry_u64(k, t6, h2, &t6); (void)_addcarry_u64(k, t7, h3, &t7); /* * Modulo p, we have: * * 2^255 = 19 * 2^510 = 19*19 = 361 * * We split the intermediate t into three parts, in basis * 2^255. The low one will be in t0..t3; the middle one in t4..t7. * The upper one can only be a single bit (th), since the * multiplication operands are at most 2^255+37 each. */ th = t7 >> 62; t7 = ((t7 << 1) | (t6 >> 63)) & MASK63; t6 = (t6 << 1) | (t5 >> 63); t5 = (t5 << 1) | (t4 >> 63); t4 = (t4 << 1) | (t3 >> 63); t3 &= MASK63; /* * Multiply the middle part (t4..t7) by 19. We truncate it to * 255 bits; the extra bits will go along with th. */ t4 = _umul128(t4, 19, &h0); t5 = _umul128(t5, 19, &h1); t6 = _umul128(t6, 19, &h2); t7 = _umul128(t7, 19, &h3); k = _addcarry_u64(0, t5, h0, &t5); k = _addcarry_u64(k, t6, h1, &t6); k = _addcarry_u64(k, t7, h2, &t7); (void)_addcarry_u64(k, h3, 0, &h3); th = (361 & -th) + (19 * ((h3 << 1) + (t7 >> 63))); t7 &= MASK63; /* * Add elements together. * At this point: * t0..t3 fits on 255 bits. * t4..t7 fits on 255 bits. * th <= 361 + 342 = 703. */ k = _addcarry_u64(0, t0, t4, &t0); k = _addcarry_u64(k, t1, t5, &t1); k = _addcarry_u64(k, t2, t6, &t2); k = _addcarry_u64(k, t3, t7, &t3); t4 = k; k = _addcarry_u64(0, t0, th, &t0); k = _addcarry_u64(k, t1, 0, &t1); k = _addcarry_u64(k, t2, 0, &t2); k = _addcarry_u64(k, t3, 0, &t3); (void)_addcarry_u64(k, t4, 0, &t4); th = (t4 << 1) + (t3 >> 63); t3 &= MASK63; /* * Since the sum is at most 2^256 + 703, the two upper bits, in th, * can only have value 0, 1 or 2. We just add th*19, which * guarantees a result of at most 2^255+37. */ k = _addcarry_u64(0, t0, 19 * th, &d[0]); k = _addcarry_u64(k, t1, 0, &d[1]); k = _addcarry_u64(k, t2, 0, &d[2]); (void)_addcarry_u64(k, t3, 0, &d[3]); #endif } /* * Multiplication by A24 = 121665. */ static inline void _src_ec_ec_c25519_m64_cf255_mul_a24(uint64_t *d, const uint64_t *a) { #if BR_INT128 uint64_t t0, t1, t2, t3; unsigned __int128 z; z = (unsigned __int128)a[0] * 121665; t0 = (uint64_t)z; z = (unsigned __int128)a[1] * 121665 + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)a[2] * 121665 + (z >> 64); t2 = (uint64_t)z; z = (unsigned __int128)a[3] * 121665 + (z >> 64); t3 = (uint64_t)z & MASK63; z = (unsigned __int128)t0 + (19 * (uint64_t)(z >> 63)); t0 = (uint64_t)z; z = (unsigned __int128)t1 + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)t2 + (z >> 64); t2 = (uint64_t)z; t3 = t3 + (uint64_t)(z >> 64); z = (unsigned __int128)t0 + (19 & -(t3 >> 63)); d[0] = (uint64_t)z; z = (unsigned __int128)t1 + (z >> 64); d[1] = (uint64_t)z; z = (unsigned __int128)t2 + (z >> 64); d[2] = (uint64_t)z; d[3] = (t3 & MASK63) + (uint64_t)(z >> 64); #elif BR_UMUL128 uint64_t t0, t1, t2, t3, t4, h0, h1, h2, h3; unsigned char k; t0 = _umul128(a[0], 121665, &h0); t1 = _umul128(a[1], 121665, &h1); k = _addcarry_u64(0, t1, h0, &t1); t2 = _umul128(a[2], 121665, &h2); k = _addcarry_u64(k, t2, h1, &t2); t3 = _umul128(a[3], 121665, &h3); k = _addcarry_u64(k, t3, h2, &t3); (void)_addcarry_u64(k, h3, 0, &t4); t4 = (t4 << 1) + (t3 >> 63); t3 &= MASK63; k = _addcarry_u64(0, t0, 19 * t4, &t0); k = _addcarry_u64(k, t1, 0, &t1); k = _addcarry_u64(k, t2, 0, &t2); (void)_addcarry_u64(k, t3, 0, &t3); t4 = 19 & -(t3 >> 63); t3 &= MASK63; k = _addcarry_u64(0, t0, t4, &d[0]); k = _addcarry_u64(k, t1, 0, &d[1]); k = _addcarry_u64(k, t2, 0, &d[2]); (void)_addcarry_u64(k, t3, 0, &d[3]); #endif } /* * Finalize reduction. */ static inline void _src_ec_ec_c25519_m64_cf255_final_reduce(uint64_t *a) { #if BR_INT128 uint64_t t0, t1, t2, t3, m; unsigned __int128 z; /* * We add 19. If the result (in t) is below 2^255, then a[] * is already less than 2^255-19, thus already reduced. * Otherwise, we subtract 2^255 from t[], in which case we * have t = a - (2^255-19), and that's our result. */ z = (unsigned __int128)a[0] + 19; t0 = (uint64_t)z; z = (unsigned __int128)a[1] + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)a[2] + (z >> 64); t2 = (uint64_t)z; t3 = a[3] + (uint64_t)(z >> 64); m = -(t3 >> 63); t3 &= MASK63; a[0] ^= m & (a[0] ^ t0); a[1] ^= m & (a[1] ^ t1); a[2] ^= m & (a[2] ^ t2); a[3] ^= m & (a[3] ^ t3); #elif BR_UMUL128 uint64_t t0, t1, t2, t3, m; unsigned char k; /* * We add 19. If the result (in t) is below 2^255, then a[] * is already less than 2^255-19, thus already reduced. * Otherwise, we subtract 2^255 from t[], in which case we * have t = a - (2^255-19), and that's our result. */ k = _addcarry_u64(0, a[0], 19, &t0); k = _addcarry_u64(k, a[1], 0, &t1); k = _addcarry_u64(k, a[2], 0, &t2); (void)_addcarry_u64(k, a[3], 0, &t3); m = -(t3 >> 63); t3 &= MASK63; a[0] ^= m & (a[0] ^ t0); a[1] ^= m & (a[1] ^ t1); a[2] ^= m & (a[2] ^ t2); a[3] ^= m & (a[3] ^ t3); #endif } static uint32_t _src_ec_ec_c25519_m64_capi_mul(unsigned char *G, size_t Glen, const unsigned char *kb, size_t kblen, int curve) { unsigned char k[32]; uint64_t x1[4], x2[4], z2[4], x3[4], z3[4]; uint32_t swap; int i; (void)curve; /* * Points are encoded over exactly 32 bytes. Multipliers must fit * in 32 bytes as well. */ if (Glen != 32 || kblen > 32) { return 0; } /* * RFC 7748 mandates that the high bit of the last point byte must * be ignored/cleared. */ x1[0] = br_dec64le(&G[ 0]); x1[1] = br_dec64le(&G[ 8]); x1[2] = br_dec64le(&G[16]); x1[3] = br_dec64le(&G[24]) & MASK63; /* * We can use memset() to clear values, because exact-width types * like uint64_t are guaranteed to have no padding bits or * trap representations. */ memset(x2, 0, sizeof x2); x2[0] = 1; memset(z2, 0, sizeof z2); memcpy(x3, x1, sizeof x1); memcpy(z3, x2, sizeof x2); /* * The multiplier is provided in big-endian notation, and * possibly shorter than 32 bytes. */ memset(k, 0, (sizeof k) - kblen); memcpy(k + (sizeof k) - kblen, kb, kblen); k[31] &= 0xF8; k[0] &= 0x7F; k[0] |= 0x40; swap = 0; for (i = 254; i >= 0; i --) { uint64_t a[4], aa[4], b[4], bb[4], e[4]; uint64_t c[4], d[4], da[4], cb[4]; uint32_t kt; kt = (k[31 - (i >> 3)] >> (i & 7)) & 1; swap ^= kt; _src_ec_ec_c25519_m64_cf255__src_ec_ec_c25519_m64_ccswap(x2, x3, swap); _src_ec_ec_c25519_m64_cf255__src_ec_ec_c25519_m64_ccswap(z2, z3, swap); swap = kt; /* A = x_2 + z_2 */ _src_ec_ec_c25519_m64_cf255_add(a, x2, z2); /* AA = A^2 */ _src_ec_ec_c25519_m64_cf255_mul(aa, a, a); /* B = x_2 - z_2 */ _src_ec_ec_c25519_m64_cf255_sub(b, x2, z2); /* BB = B^2 */ _src_ec_ec_c25519_m64_cf255_mul(bb, b, b); /* E = AA - BB */ _src_ec_ec_c25519_m64_cf255_sub(e, aa, bb); /* C = x_3 + z_3 */ _src_ec_ec_c25519_m64_cf255_add(c, x3, z3); /* D = x_3 - z_3 */ _src_ec_ec_c25519_m64_cf255_sub(d, x3, z3); /* DA = D * A */ _src_ec_ec_c25519_m64_cf255_mul(da, d, a); /* CB = C * B */ _src_ec_ec_c25519_m64_cf255_mul(cb, c, b); /* x_3 = (DA + CB)^2 */ _src_ec_ec_c25519_m64_cf255_add(x3, da, cb); _src_ec_ec_c25519_m64_cf255_mul(x3, x3, x3); /* z_3 = x_1 * (DA - CB)^2 */ _src_ec_ec_c25519_m64_cf255_sub(z3, da, cb); _src_ec_ec_c25519_m64_cf255_mul(z3, z3, z3); _src_ec_ec_c25519_m64_cf255_mul(z3, x1, z3); /* x_2 = AA * BB */ _src_ec_ec_c25519_m64_cf255_mul(x2, aa, bb); /* z_2 = E * (AA + a24 * E) */ _src_ec_ec_c25519_m64_cf255_mul_a24(z2, e); _src_ec_ec_c25519_m64_cf255_add(z2, aa, z2); _src_ec_ec_c25519_m64_cf255_mul(z2, e, z2); } _src_ec_ec_c25519_m64_cf255__src_ec_ec_c25519_m64_ccswap(x2, x3, swap); _src_ec_ec_c25519_m64_cf255__src_ec_ec_c25519_m64_ccswap(z2, z3, swap); /* * Compute 1/z2 = z2^(p-2). Since p = 2^255-19, we can mutualize * most non-squarings. We use x1 and x3, now useless, as temporaries. */ memcpy(x1, z2, sizeof z2); for (i = 0; i < 15; i ++) { _src_ec_ec_c25519_m64_cf255_mul(x1, x1, x1); _src_ec_ec_c25519_m64_cf255_mul(x1, x1, z2); } memcpy(x3, x1, sizeof x1); for (i = 0; i < 14; i ++) { int j; for (j = 0; j < 16; j ++) { _src_ec_ec_c25519_m64_cf255_mul(x3, x3, x3); } _src_ec_ec_c25519_m64_cf255_mul(x3, x3, x1); } for (i = 14; i >= 0; i --) { _src_ec_ec_c25519_m64_cf255_mul(x3, x3, x3); if ((0xFFEB >> i) & 1) { _src_ec_ec_c25519_m64_cf255_mul(x3, z2, x3); } } /* * Compute x2/z2. We have 1/z2 in x3. */ _src_ec_ec_c25519_m64_cf255_mul(x2, x2, x3); _src_ec_ec_c25519_m64_cf255_final_reduce(x2); /* * Encode the final x2 value in little-endian. */ br_enc64le(G, x2[0]); br_enc64le(G + 8, x2[1]); br_enc64le(G + 16, x2[2]); br_enc64le(G + 24, x2[3]); return 1; } static size_t _src_ec_ec_c25519_m64_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_c25519_m64_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_c25519_m64_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_c25519_m64_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We don't implement this method, since it is used for ECDSA * only, and there is no ECDSA over Curve25519 (which instead * uses EdDSA). */ (void)A; (void)B; (void)len; (void)x; (void)xlen; (void)y; (void)ylen; (void)curve; return 0; } /* see bearssl_ec.h */ const br_ec_impl br_ec_c25519_m64 = { (uint32_t)0x20000000, &_src_ec_ec_c25519_m64_capi_generator, &_src_ec_ec_c25519_m64_capi_order, &_src_ec_ec_c25519_m64_capi_xoff, &_src_ec_ec_c25519_m64_capi_mul, &_src_ec_ec_c25519_m64_capi_mulgen, &_src_ec_ec_c25519_m64_capi_muladd }; /* see bearssl_ec.h */ const br_ec_impl * br_ec_c25519_m64_get(void) { return &br_ec_c25519_m64; } #else /* see bearssl_ec.h */ const br_ec_impl * br_ec_c25519_m64_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char _src_ec_ec_curve25519_cGEN[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const unsigned char _src_ec_ec_curve25519_cORDER[] = { 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; /* see inner.h */ const br_ec_curve_def br_curve25519 = { BR_EC_curve25519, _src_ec_ec_curve25519_cORDER, sizeof _src_ec_ec_curve25519_cORDER, _src_ec_ec_curve25519_cGEN, sizeof _src_ec_ec_curve25519_cGEN }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ const br_ec_impl * br_ec_get_default(void) { #if BR_LOMUL return &br_ec_all_m15; #else return &br_ec_all_m31; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ size_t br_ec_keygen(const br_prng_class **rng_ctx, const br_ec_impl *impl, br_ec_private_key *sk, void *kbuf, int curve) { const unsigned char *order; unsigned char *buf; size_t len; unsigned mask; if (curve < 0 || curve >= 32 || ((impl->supported_curves >> curve) & 1) == 0) { return 0; } order = impl->order(curve, &len); while (len > 0 && *order == 0) { order ++; len --; } if (kbuf == NULL || len == 0) { return len; } mask = order[0]; mask |= (mask >> 1); mask |= (mask >> 2); mask |= (mask >> 4); /* * We generate sequences of random bits of the right size, until * the value is strictly lower than the curve order (we also * check for all-zero values, which are invalid). */ buf = (unsigned char*)kbuf; for (;;) { size_t u; unsigned cc, zz; (*rng_ctx)->generate(rng_ctx, buf, len); buf[0] &= mask; cc = 0; u = len; zz = 0; while (u -- > 0) { cc = ((unsigned)(buf[u] - order[u] - cc) >> 8) & 1; zz |= buf[u]; } if (cc != 0 && zz != 0) { break; } } if (sk != NULL) { sk->curve = curve; sk->x = buf; sk->xlen = len; } return len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * If BR_NO_ARITH_SHIFT is undefined, or defined to 0, then we _assume_ * that right-shifting a signed negative integer copies the sign bit * (arithmetic right-shift). This is "implementation-defined behaviour", * i.e. it is not undefined, but it may differ between compilers. Each * compiler is supposed to document its behaviour in that respect. GCC * explicitly defines that an arithmetic right shift is used. We expect * all other compilers to do the same, because underlying CPU offer an * arithmetic right shift opcode that could not be used otherwise. */ #if BR_NO_ARITH_SHIFT #define ARSH(x, n) (((uint32_t)(x) >> (n)) \ | ((-((uint32_t)(x) >> 31)) << (32 - (n)))) #else #define ARSH(x, n) ((*(int32_t *)&(x)) >> (n)) #endif /* * Convert an integer from unsigned big-endian encoding to a sequence of * 13-bit words in little-endian order. The final "partial" word is * returned. */ static uint32_t be8_to_le13(uint32_t *dst, const unsigned char *src, size_t len) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { acc |= (uint32_t)src[len] << acc_len; acc_len += 8; if (acc_len >= 13) { *dst ++ = acc & 0x1FFF; acc >>= 13; acc_len -= 13; } } return acc; } /* * Convert an integer (13-bit words, little-endian) to unsigned * big-endian encoding. The total encoding length is provided; all * the destination bytes will be filled. */ static void le13_to_be8(unsigned char *dst, size_t len, const uint32_t *src) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { if (acc_len < 8) { acc |= (*src ++) << acc_len; acc_len += 13; } dst[len] = (unsigned char)acc; acc >>= 8; acc_len -= 8; } } /* * Normalise an array of words to a strict 13 bits per word. Returned * value is the resulting carry. The source (w) and destination (d) * arrays may be identical, but shall not overlap partially. */ static inline uint32_t _src_ec_ec_p256_m15_cnorm13(uint32_t *d, const uint32_t *w, size_t len) { size_t u; uint32_t cc; cc = 0; for (u = 0; u < len; u ++) { int32_t z; z = w[u] + cc; d[u] = z & 0x1FFF; cc = ARSH(z, 13); } return cc; } /* * _src_ec_ec_p256_m15_cmul20() multiplies two 260-bit integers together. Each word must fit * on 13 bits; source operands use 20 words, destination operand * receives 40 words. All overlaps allowed. * * _src_ec_ec_p256_m15_csquare20() computes the square of a 260-bit integer. Each word must * fit on 13 bits; source operand uses 20 words, destination operand * receives 40 words. All overlaps allowed. */ #if BR_SLOW_MUL15 static void _src_ec_ec_p256_m15_cmul20(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * Two-level Karatsuba: turns a 20x20 multiplication into * nine 5x5 multiplications. We use 13-bit words but do not * propagate carries immediately, so words may expand: * * - First Karatsuba decomposition turns the 20x20 mul on * 13-bit words into three 10x10 muls, two on 13-bit words * and one on 14-bit words. * * - Second Karatsuba decomposition further splits these into: * * * four 5x5 muls on 13-bit words * * four 5x5 muls on 14-bit words * * one 5x5 mul on 15-bit words * * Highest word value is 8191, 16382 or 32764, for 13-bit, 14-bit * or 15-bit words, respectively. */ uint32_t u[45], v[45], w[90]; uint32_t cc; int i; #define ZADD(dw, d_off, s1w, s1_off, s2w, s2_off) do { \ (dw)[5 * (d_off) + 0] = (s1w)[5 * (s1_off) + 0] \ + (s2w)[5 * (s2_off) + 0]; \ (dw)[5 * (d_off) + 1] = (s1w)[5 * (s1_off) + 1] \ + (s2w)[5 * (s2_off) + 1]; \ (dw)[5 * (d_off) + 2] = (s1w)[5 * (s1_off) + 2] \ + (s2w)[5 * (s2_off) + 2]; \ (dw)[5 * (d_off) + 3] = (s1w)[5 * (s1_off) + 3] \ + (s2w)[5 * (s2_off) + 3]; \ (dw)[5 * (d_off) + 4] = (s1w)[5 * (s1_off) + 4] \ + (s2w)[5 * (s2_off) + 4]; \ } while (0) #define ZADDT(dw, d_off, sw, s_off) do { \ (dw)[5 * (d_off) + 0] += (sw)[5 * (s_off) + 0]; \ (dw)[5 * (d_off) + 1] += (sw)[5 * (s_off) + 1]; \ (dw)[5 * (d_off) + 2] += (sw)[5 * (s_off) + 2]; \ (dw)[5 * (d_off) + 3] += (sw)[5 * (s_off) + 3]; \ (dw)[5 * (d_off) + 4] += (sw)[5 * (s_off) + 4]; \ } while (0) #define ZSUB2F(dw, d_off, s1w, s1_off, s2w, s2_off) do { \ (dw)[5 * (d_off) + 0] -= (s1w)[5 * (s1_off) + 0] \ + (s2w)[5 * (s2_off) + 0]; \ (dw)[5 * (d_off) + 1] -= (s1w)[5 * (s1_off) + 1] \ + (s2w)[5 * (s2_off) + 1]; \ (dw)[5 * (d_off) + 2] -= (s1w)[5 * (s1_off) + 2] \ + (s2w)[5 * (s2_off) + 2]; \ (dw)[5 * (d_off) + 3] -= (s1w)[5 * (s1_off) + 3] \ + (s2w)[5 * (s2_off) + 3]; \ (dw)[5 * (d_off) + 4] -= (s1w)[5 * (s1_off) + 4] \ + (s2w)[5 * (s2_off) + 4]; \ } while (0) #define CPR1(w, cprcc) do { \ uint32_t cprz = (w) + cprcc; \ (w) = cprz & 0x1FFF; \ cprcc = cprz >> 13; \ } while (0) #define CPR(dw, d_off) do { \ uint32_t cprcc; \ cprcc = 0; \ CPR1((dw)[(d_off) + 0], cprcc); \ CPR1((dw)[(d_off) + 1], cprcc); \ CPR1((dw)[(d_off) + 2], cprcc); \ CPR1((dw)[(d_off) + 3], cprcc); \ CPR1((dw)[(d_off) + 4], cprcc); \ CPR1((dw)[(d_off) + 5], cprcc); \ CPR1((dw)[(d_off) + 6], cprcc); \ CPR1((dw)[(d_off) + 7], cprcc); \ CPR1((dw)[(d_off) + 8], cprcc); \ (dw)[(d_off) + 9] = cprcc; \ } while (0) memcpy(u, a, 20 * sizeof *a); ZADD(u, 4, a, 0, a, 1); ZADD(u, 5, a, 2, a, 3); ZADD(u, 6, a, 0, a, 2); ZADD(u, 7, a, 1, a, 3); ZADD(u, 8, u, 6, u, 7); memcpy(v, b, 20 * sizeof *b); ZADD(v, 4, b, 0, b, 1); ZADD(v, 5, b, 2, b, 3); ZADD(v, 6, b, 0, b, 2); ZADD(v, 7, b, 1, b, 3); ZADD(v, 8, v, 6, v, 7); /* * Do the eight first 8x8 muls. Source words are at most 16382 * each, so we can add product results together "as is" in 32-bit * words. */ for (i = 0; i < 40; i += 5) { w[(i << 1) + 0] = MUL15(u[i + 0], v[i + 0]); w[(i << 1) + 1] = MUL15(u[i + 0], v[i + 1]) + MUL15(u[i + 1], v[i + 0]); w[(i << 1) + 2] = MUL15(u[i + 0], v[i + 2]) + MUL15(u[i + 1], v[i + 1]) + MUL15(u[i + 2], v[i + 0]); w[(i << 1) + 3] = MUL15(u[i + 0], v[i + 3]) + MUL15(u[i + 1], v[i + 2]) + MUL15(u[i + 2], v[i + 1]) + MUL15(u[i + 3], v[i + 0]); w[(i << 1) + 4] = MUL15(u[i + 0], v[i + 4]) + MUL15(u[i + 1], v[i + 3]) + MUL15(u[i + 2], v[i + 2]) + MUL15(u[i + 3], v[i + 1]) + MUL15(u[i + 4], v[i + 0]); w[(i << 1) + 5] = MUL15(u[i + 1], v[i + 4]) + MUL15(u[i + 2], v[i + 3]) + MUL15(u[i + 3], v[i + 2]) + MUL15(u[i + 4], v[i + 1]); w[(i << 1) + 6] = MUL15(u[i + 2], v[i + 4]) + MUL15(u[i + 3], v[i + 3]) + MUL15(u[i + 4], v[i + 2]); w[(i << 1) + 7] = MUL15(u[i + 3], v[i + 4]) + MUL15(u[i + 4], v[i + 3]); w[(i << 1) + 8] = MUL15(u[i + 4], v[i + 4]); w[(i << 1) + 9] = 0; } /* * For the 9th multiplication, source words are up to 32764, * so we must do some carry propagation. If we add up to * 4 products and the carry is no more than 524224, then the * result fits in 32 bits, and the next carry will be no more * than 524224 (because 4*(32764^2)+524224 < 8192*524225). * * We thus just skip one of the products in the middle word, * then do a carry propagation (this reduces words to 13 bits * each, except possibly the last, which may use up to 17 bits * or so), then add the missing product. */ w[80 + 0] = MUL15(u[40 + 0], v[40 + 0]); w[80 + 1] = MUL15(u[40 + 0], v[40 + 1]) + MUL15(u[40 + 1], v[40 + 0]); w[80 + 2] = MUL15(u[40 + 0], v[40 + 2]) + MUL15(u[40 + 1], v[40 + 1]) + MUL15(u[40 + 2], v[40 + 0]); w[80 + 3] = MUL15(u[40 + 0], v[40 + 3]) + MUL15(u[40 + 1], v[40 + 2]) + MUL15(u[40 + 2], v[40 + 1]) + MUL15(u[40 + 3], v[40 + 0]); w[80 + 4] = MUL15(u[40 + 0], v[40 + 4]) + MUL15(u[40 + 1], v[40 + 3]) + MUL15(u[40 + 2], v[40 + 2]) + MUL15(u[40 + 3], v[40 + 1]); /* + MUL15(u[40 + 4], v[40 + 0]) */ w[80 + 5] = MUL15(u[40 + 1], v[40 + 4]) + MUL15(u[40 + 2], v[40 + 3]) + MUL15(u[40 + 3], v[40 + 2]) + MUL15(u[40 + 4], v[40 + 1]); w[80 + 6] = MUL15(u[40 + 2], v[40 + 4]) + MUL15(u[40 + 3], v[40 + 3]) + MUL15(u[40 + 4], v[40 + 2]); w[80 + 7] = MUL15(u[40 + 3], v[40 + 4]) + MUL15(u[40 + 4], v[40 + 3]); w[80 + 8] = MUL15(u[40 + 4], v[40 + 4]); CPR(w, 80); w[80 + 4] += MUL15(u[40 + 4], v[40 + 0]); /* * The products on 14-bit words in slots 6 and 7 yield values * up to 5*(16382^2) each, and we need to subtract two such * values from the higher word. We need the subtraction to fit * in a _signed_ 32-bit integer, i.e. 31 bits + a sign bit. * However, 10*(16382^2) does not fit. So we must perform a * bit of reduction here. */ CPR(w, 60); CPR(w, 70); /* * Recompose results. */ /* 0..1*0..1 into 0..3 */ ZSUB2F(w, 8, w, 0, w, 2); ZSUB2F(w, 9, w, 1, w, 3); ZADDT(w, 1, w, 8); ZADDT(w, 2, w, 9); /* 2..3*2..3 into 4..7 */ ZSUB2F(w, 10, w, 4, w, 6); ZSUB2F(w, 11, w, 5, w, 7); ZADDT(w, 5, w, 10); ZADDT(w, 6, w, 11); /* (0..1+2..3)*(0..1+2..3) into 12..15 */ ZSUB2F(w, 16, w, 12, w, 14); ZSUB2F(w, 17, w, 13, w, 15); ZADDT(w, 13, w, 16); ZADDT(w, 14, w, 17); /* first-level recomposition */ ZSUB2F(w, 12, w, 0, w, 4); ZSUB2F(w, 13, w, 1, w, 5); ZSUB2F(w, 14, w, 2, w, 6); ZSUB2F(w, 15, w, 3, w, 7); ZADDT(w, 2, w, 12); ZADDT(w, 3, w, 13); ZADDT(w, 4, w, 14); ZADDT(w, 5, w, 15); /* * Perform carry propagation to bring all words down to 13 bits. */ cc = _src_ec_ec_p256_m15_cnorm13(d, w, 40); d[39] += (cc << 13); #undef ZADD #undef ZADDT #undef ZSUB2F #undef CPR1 #undef CPR } static inline void _src_ec_ec_p256_m15_csquare20(uint32_t *d, const uint32_t *a) { _src_ec_ec_p256_m15_cmul20(d, a, a); } #else static void _src_ec_ec_p256_m15_cmul20(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[39]; t[ 0] = MUL15(a[ 0], b[ 0]); t[ 1] = MUL15(a[ 0], b[ 1]) + MUL15(a[ 1], b[ 0]); t[ 2] = MUL15(a[ 0], b[ 2]) + MUL15(a[ 1], b[ 1]) + MUL15(a[ 2], b[ 0]); t[ 3] = MUL15(a[ 0], b[ 3]) + MUL15(a[ 1], b[ 2]) + MUL15(a[ 2], b[ 1]) + MUL15(a[ 3], b[ 0]); t[ 4] = MUL15(a[ 0], b[ 4]) + MUL15(a[ 1], b[ 3]) + MUL15(a[ 2], b[ 2]) + MUL15(a[ 3], b[ 1]) + MUL15(a[ 4], b[ 0]); t[ 5] = MUL15(a[ 0], b[ 5]) + MUL15(a[ 1], b[ 4]) + MUL15(a[ 2], b[ 3]) + MUL15(a[ 3], b[ 2]) + MUL15(a[ 4], b[ 1]) + MUL15(a[ 5], b[ 0]); t[ 6] = MUL15(a[ 0], b[ 6]) + MUL15(a[ 1], b[ 5]) + MUL15(a[ 2], b[ 4]) + MUL15(a[ 3], b[ 3]) + MUL15(a[ 4], b[ 2]) + MUL15(a[ 5], b[ 1]) + MUL15(a[ 6], b[ 0]); t[ 7] = MUL15(a[ 0], b[ 7]) + MUL15(a[ 1], b[ 6]) + MUL15(a[ 2], b[ 5]) + MUL15(a[ 3], b[ 4]) + MUL15(a[ 4], b[ 3]) + MUL15(a[ 5], b[ 2]) + MUL15(a[ 6], b[ 1]) + MUL15(a[ 7], b[ 0]); t[ 8] = MUL15(a[ 0], b[ 8]) + MUL15(a[ 1], b[ 7]) + MUL15(a[ 2], b[ 6]) + MUL15(a[ 3], b[ 5]) + MUL15(a[ 4], b[ 4]) + MUL15(a[ 5], b[ 3]) + MUL15(a[ 6], b[ 2]) + MUL15(a[ 7], b[ 1]) + MUL15(a[ 8], b[ 0]); t[ 9] = MUL15(a[ 0], b[ 9]) + MUL15(a[ 1], b[ 8]) + MUL15(a[ 2], b[ 7]) + MUL15(a[ 3], b[ 6]) + MUL15(a[ 4], b[ 5]) + MUL15(a[ 5], b[ 4]) + MUL15(a[ 6], b[ 3]) + MUL15(a[ 7], b[ 2]) + MUL15(a[ 8], b[ 1]) + MUL15(a[ 9], b[ 0]); t[10] = MUL15(a[ 0], b[10]) + MUL15(a[ 1], b[ 9]) + MUL15(a[ 2], b[ 8]) + MUL15(a[ 3], b[ 7]) + MUL15(a[ 4], b[ 6]) + MUL15(a[ 5], b[ 5]) + MUL15(a[ 6], b[ 4]) + MUL15(a[ 7], b[ 3]) + MUL15(a[ 8], b[ 2]) + MUL15(a[ 9], b[ 1]) + MUL15(a[10], b[ 0]); t[11] = MUL15(a[ 0], b[11]) + MUL15(a[ 1], b[10]) + MUL15(a[ 2], b[ 9]) + MUL15(a[ 3], b[ 8]) + MUL15(a[ 4], b[ 7]) + MUL15(a[ 5], b[ 6]) + MUL15(a[ 6], b[ 5]) + MUL15(a[ 7], b[ 4]) + MUL15(a[ 8], b[ 3]) + MUL15(a[ 9], b[ 2]) + MUL15(a[10], b[ 1]) + MUL15(a[11], b[ 0]); t[12] = MUL15(a[ 0], b[12]) + MUL15(a[ 1], b[11]) + MUL15(a[ 2], b[10]) + MUL15(a[ 3], b[ 9]) + MUL15(a[ 4], b[ 8]) + MUL15(a[ 5], b[ 7]) + MUL15(a[ 6], b[ 6]) + MUL15(a[ 7], b[ 5]) + MUL15(a[ 8], b[ 4]) + MUL15(a[ 9], b[ 3]) + MUL15(a[10], b[ 2]) + MUL15(a[11], b[ 1]) + MUL15(a[12], b[ 0]); t[13] = MUL15(a[ 0], b[13]) + MUL15(a[ 1], b[12]) + MUL15(a[ 2], b[11]) + MUL15(a[ 3], b[10]) + MUL15(a[ 4], b[ 9]) + MUL15(a[ 5], b[ 8]) + MUL15(a[ 6], b[ 7]) + MUL15(a[ 7], b[ 6]) + MUL15(a[ 8], b[ 5]) + MUL15(a[ 9], b[ 4]) + MUL15(a[10], b[ 3]) + MUL15(a[11], b[ 2]) + MUL15(a[12], b[ 1]) + MUL15(a[13], b[ 0]); t[14] = MUL15(a[ 0], b[14]) + MUL15(a[ 1], b[13]) + MUL15(a[ 2], b[12]) + MUL15(a[ 3], b[11]) + MUL15(a[ 4], b[10]) + MUL15(a[ 5], b[ 9]) + MUL15(a[ 6], b[ 8]) + MUL15(a[ 7], b[ 7]) + MUL15(a[ 8], b[ 6]) + MUL15(a[ 9], b[ 5]) + MUL15(a[10], b[ 4]) + MUL15(a[11], b[ 3]) + MUL15(a[12], b[ 2]) + MUL15(a[13], b[ 1]) + MUL15(a[14], b[ 0]); t[15] = MUL15(a[ 0], b[15]) + MUL15(a[ 1], b[14]) + MUL15(a[ 2], b[13]) + MUL15(a[ 3], b[12]) + MUL15(a[ 4], b[11]) + MUL15(a[ 5], b[10]) + MUL15(a[ 6], b[ 9]) + MUL15(a[ 7], b[ 8]) + MUL15(a[ 8], b[ 7]) + MUL15(a[ 9], b[ 6]) + MUL15(a[10], b[ 5]) + MUL15(a[11], b[ 4]) + MUL15(a[12], b[ 3]) + MUL15(a[13], b[ 2]) + MUL15(a[14], b[ 1]) + MUL15(a[15], b[ 0]); t[16] = MUL15(a[ 0], b[16]) + MUL15(a[ 1], b[15]) + MUL15(a[ 2], b[14]) + MUL15(a[ 3], b[13]) + MUL15(a[ 4], b[12]) + MUL15(a[ 5], b[11]) + MUL15(a[ 6], b[10]) + MUL15(a[ 7], b[ 9]) + MUL15(a[ 8], b[ 8]) + MUL15(a[ 9], b[ 7]) + MUL15(a[10], b[ 6]) + MUL15(a[11], b[ 5]) + MUL15(a[12], b[ 4]) + MUL15(a[13], b[ 3]) + MUL15(a[14], b[ 2]) + MUL15(a[15], b[ 1]) + MUL15(a[16], b[ 0]); t[17] = MUL15(a[ 0], b[17]) + MUL15(a[ 1], b[16]) + MUL15(a[ 2], b[15]) + MUL15(a[ 3], b[14]) + MUL15(a[ 4], b[13]) + MUL15(a[ 5], b[12]) + MUL15(a[ 6], b[11]) + MUL15(a[ 7], b[10]) + MUL15(a[ 8], b[ 9]) + MUL15(a[ 9], b[ 8]) + MUL15(a[10], b[ 7]) + MUL15(a[11], b[ 6]) + MUL15(a[12], b[ 5]) + MUL15(a[13], b[ 4]) + MUL15(a[14], b[ 3]) + MUL15(a[15], b[ 2]) + MUL15(a[16], b[ 1]) + MUL15(a[17], b[ 0]); t[18] = MUL15(a[ 0], b[18]) + MUL15(a[ 1], b[17]) + MUL15(a[ 2], b[16]) + MUL15(a[ 3], b[15]) + MUL15(a[ 4], b[14]) + MUL15(a[ 5], b[13]) + MUL15(a[ 6], b[12]) + MUL15(a[ 7], b[11]) + MUL15(a[ 8], b[10]) + MUL15(a[ 9], b[ 9]) + MUL15(a[10], b[ 8]) + MUL15(a[11], b[ 7]) + MUL15(a[12], b[ 6]) + MUL15(a[13], b[ 5]) + MUL15(a[14], b[ 4]) + MUL15(a[15], b[ 3]) + MUL15(a[16], b[ 2]) + MUL15(a[17], b[ 1]) + MUL15(a[18], b[ 0]); t[19] = MUL15(a[ 0], b[19]) + MUL15(a[ 1], b[18]) + MUL15(a[ 2], b[17]) + MUL15(a[ 3], b[16]) + MUL15(a[ 4], b[15]) + MUL15(a[ 5], b[14]) + MUL15(a[ 6], b[13]) + MUL15(a[ 7], b[12]) + MUL15(a[ 8], b[11]) + MUL15(a[ 9], b[10]) + MUL15(a[10], b[ 9]) + MUL15(a[11], b[ 8]) + MUL15(a[12], b[ 7]) + MUL15(a[13], b[ 6]) + MUL15(a[14], b[ 5]) + MUL15(a[15], b[ 4]) + MUL15(a[16], b[ 3]) + MUL15(a[17], b[ 2]) + MUL15(a[18], b[ 1]) + MUL15(a[19], b[ 0]); t[20] = MUL15(a[ 1], b[19]) + MUL15(a[ 2], b[18]) + MUL15(a[ 3], b[17]) + MUL15(a[ 4], b[16]) + MUL15(a[ 5], b[15]) + MUL15(a[ 6], b[14]) + MUL15(a[ 7], b[13]) + MUL15(a[ 8], b[12]) + MUL15(a[ 9], b[11]) + MUL15(a[10], b[10]) + MUL15(a[11], b[ 9]) + MUL15(a[12], b[ 8]) + MUL15(a[13], b[ 7]) + MUL15(a[14], b[ 6]) + MUL15(a[15], b[ 5]) + MUL15(a[16], b[ 4]) + MUL15(a[17], b[ 3]) + MUL15(a[18], b[ 2]) + MUL15(a[19], b[ 1]); t[21] = MUL15(a[ 2], b[19]) + MUL15(a[ 3], b[18]) + MUL15(a[ 4], b[17]) + MUL15(a[ 5], b[16]) + MUL15(a[ 6], b[15]) + MUL15(a[ 7], b[14]) + MUL15(a[ 8], b[13]) + MUL15(a[ 9], b[12]) + MUL15(a[10], b[11]) + MUL15(a[11], b[10]) + MUL15(a[12], b[ 9]) + MUL15(a[13], b[ 8]) + MUL15(a[14], b[ 7]) + MUL15(a[15], b[ 6]) + MUL15(a[16], b[ 5]) + MUL15(a[17], b[ 4]) + MUL15(a[18], b[ 3]) + MUL15(a[19], b[ 2]); t[22] = MUL15(a[ 3], b[19]) + MUL15(a[ 4], b[18]) + MUL15(a[ 5], b[17]) + MUL15(a[ 6], b[16]) + MUL15(a[ 7], b[15]) + MUL15(a[ 8], b[14]) + MUL15(a[ 9], b[13]) + MUL15(a[10], b[12]) + MUL15(a[11], b[11]) + MUL15(a[12], b[10]) + MUL15(a[13], b[ 9]) + MUL15(a[14], b[ 8]) + MUL15(a[15], b[ 7]) + MUL15(a[16], b[ 6]) + MUL15(a[17], b[ 5]) + MUL15(a[18], b[ 4]) + MUL15(a[19], b[ 3]); t[23] = MUL15(a[ 4], b[19]) + MUL15(a[ 5], b[18]) + MUL15(a[ 6], b[17]) + MUL15(a[ 7], b[16]) + MUL15(a[ 8], b[15]) + MUL15(a[ 9], b[14]) + MUL15(a[10], b[13]) + MUL15(a[11], b[12]) + MUL15(a[12], b[11]) + MUL15(a[13], b[10]) + MUL15(a[14], b[ 9]) + MUL15(a[15], b[ 8]) + MUL15(a[16], b[ 7]) + MUL15(a[17], b[ 6]) + MUL15(a[18], b[ 5]) + MUL15(a[19], b[ 4]); t[24] = MUL15(a[ 5], b[19]) + MUL15(a[ 6], b[18]) + MUL15(a[ 7], b[17]) + MUL15(a[ 8], b[16]) + MUL15(a[ 9], b[15]) + MUL15(a[10], b[14]) + MUL15(a[11], b[13]) + MUL15(a[12], b[12]) + MUL15(a[13], b[11]) + MUL15(a[14], b[10]) + MUL15(a[15], b[ 9]) + MUL15(a[16], b[ 8]) + MUL15(a[17], b[ 7]) + MUL15(a[18], b[ 6]) + MUL15(a[19], b[ 5]); t[25] = MUL15(a[ 6], b[19]) + MUL15(a[ 7], b[18]) + MUL15(a[ 8], b[17]) + MUL15(a[ 9], b[16]) + MUL15(a[10], b[15]) + MUL15(a[11], b[14]) + MUL15(a[12], b[13]) + MUL15(a[13], b[12]) + MUL15(a[14], b[11]) + MUL15(a[15], b[10]) + MUL15(a[16], b[ 9]) + MUL15(a[17], b[ 8]) + MUL15(a[18], b[ 7]) + MUL15(a[19], b[ 6]); t[26] = MUL15(a[ 7], b[19]) + MUL15(a[ 8], b[18]) + MUL15(a[ 9], b[17]) + MUL15(a[10], b[16]) + MUL15(a[11], b[15]) + MUL15(a[12], b[14]) + MUL15(a[13], b[13]) + MUL15(a[14], b[12]) + MUL15(a[15], b[11]) + MUL15(a[16], b[10]) + MUL15(a[17], b[ 9]) + MUL15(a[18], b[ 8]) + MUL15(a[19], b[ 7]); t[27] = MUL15(a[ 8], b[19]) + MUL15(a[ 9], b[18]) + MUL15(a[10], b[17]) + MUL15(a[11], b[16]) + MUL15(a[12], b[15]) + MUL15(a[13], b[14]) + MUL15(a[14], b[13]) + MUL15(a[15], b[12]) + MUL15(a[16], b[11]) + MUL15(a[17], b[10]) + MUL15(a[18], b[ 9]) + MUL15(a[19], b[ 8]); t[28] = MUL15(a[ 9], b[19]) + MUL15(a[10], b[18]) + MUL15(a[11], b[17]) + MUL15(a[12], b[16]) + MUL15(a[13], b[15]) + MUL15(a[14], b[14]) + MUL15(a[15], b[13]) + MUL15(a[16], b[12]) + MUL15(a[17], b[11]) + MUL15(a[18], b[10]) + MUL15(a[19], b[ 9]); t[29] = MUL15(a[10], b[19]) + MUL15(a[11], b[18]) + MUL15(a[12], b[17]) + MUL15(a[13], b[16]) + MUL15(a[14], b[15]) + MUL15(a[15], b[14]) + MUL15(a[16], b[13]) + MUL15(a[17], b[12]) + MUL15(a[18], b[11]) + MUL15(a[19], b[10]); t[30] = MUL15(a[11], b[19]) + MUL15(a[12], b[18]) + MUL15(a[13], b[17]) + MUL15(a[14], b[16]) + MUL15(a[15], b[15]) + MUL15(a[16], b[14]) + MUL15(a[17], b[13]) + MUL15(a[18], b[12]) + MUL15(a[19], b[11]); t[31] = MUL15(a[12], b[19]) + MUL15(a[13], b[18]) + MUL15(a[14], b[17]) + MUL15(a[15], b[16]) + MUL15(a[16], b[15]) + MUL15(a[17], b[14]) + MUL15(a[18], b[13]) + MUL15(a[19], b[12]); t[32] = MUL15(a[13], b[19]) + MUL15(a[14], b[18]) + MUL15(a[15], b[17]) + MUL15(a[16], b[16]) + MUL15(a[17], b[15]) + MUL15(a[18], b[14]) + MUL15(a[19], b[13]); t[33] = MUL15(a[14], b[19]) + MUL15(a[15], b[18]) + MUL15(a[16], b[17]) + MUL15(a[17], b[16]) + MUL15(a[18], b[15]) + MUL15(a[19], b[14]); t[34] = MUL15(a[15], b[19]) + MUL15(a[16], b[18]) + MUL15(a[17], b[17]) + MUL15(a[18], b[16]) + MUL15(a[19], b[15]); t[35] = MUL15(a[16], b[19]) + MUL15(a[17], b[18]) + MUL15(a[18], b[17]) + MUL15(a[19], b[16]); t[36] = MUL15(a[17], b[19]) + MUL15(a[18], b[18]) + MUL15(a[19], b[17]); t[37] = MUL15(a[18], b[19]) + MUL15(a[19], b[18]); t[38] = MUL15(a[19], b[19]); d[39] = _src_ec_ec_p256_m15_cnorm13(d, t, 39); } static void _src_ec_ec_p256_m15_csquare20(uint32_t *d, const uint32_t *a) { uint32_t t[39]; t[ 0] = MUL15(a[ 0], a[ 0]); t[ 1] = ((MUL15(a[ 0], a[ 1])) << 1); t[ 2] = MUL15(a[ 1], a[ 1]) + ((MUL15(a[ 0], a[ 2])) << 1); t[ 3] = ((MUL15(a[ 0], a[ 3]) + MUL15(a[ 1], a[ 2])) << 1); t[ 4] = MUL15(a[ 2], a[ 2]) + ((MUL15(a[ 0], a[ 4]) + MUL15(a[ 1], a[ 3])) << 1); t[ 5] = ((MUL15(a[ 0], a[ 5]) + MUL15(a[ 1], a[ 4]) + MUL15(a[ 2], a[ 3])) << 1); t[ 6] = MUL15(a[ 3], a[ 3]) + ((MUL15(a[ 0], a[ 6]) + MUL15(a[ 1], a[ 5]) + MUL15(a[ 2], a[ 4])) << 1); t[ 7] = ((MUL15(a[ 0], a[ 7]) + MUL15(a[ 1], a[ 6]) + MUL15(a[ 2], a[ 5]) + MUL15(a[ 3], a[ 4])) << 1); t[ 8] = MUL15(a[ 4], a[ 4]) + ((MUL15(a[ 0], a[ 8]) + MUL15(a[ 1], a[ 7]) + MUL15(a[ 2], a[ 6]) + MUL15(a[ 3], a[ 5])) << 1); t[ 9] = ((MUL15(a[ 0], a[ 9]) + MUL15(a[ 1], a[ 8]) + MUL15(a[ 2], a[ 7]) + MUL15(a[ 3], a[ 6]) + MUL15(a[ 4], a[ 5])) << 1); t[10] = MUL15(a[ 5], a[ 5]) + ((MUL15(a[ 0], a[10]) + MUL15(a[ 1], a[ 9]) + MUL15(a[ 2], a[ 8]) + MUL15(a[ 3], a[ 7]) + MUL15(a[ 4], a[ 6])) << 1); t[11] = ((MUL15(a[ 0], a[11]) + MUL15(a[ 1], a[10]) + MUL15(a[ 2], a[ 9]) + MUL15(a[ 3], a[ 8]) + MUL15(a[ 4], a[ 7]) + MUL15(a[ 5], a[ 6])) << 1); t[12] = MUL15(a[ 6], a[ 6]) + ((MUL15(a[ 0], a[12]) + MUL15(a[ 1], a[11]) + MUL15(a[ 2], a[10]) + MUL15(a[ 3], a[ 9]) + MUL15(a[ 4], a[ 8]) + MUL15(a[ 5], a[ 7])) << 1); t[13] = ((MUL15(a[ 0], a[13]) + MUL15(a[ 1], a[12]) + MUL15(a[ 2], a[11]) + MUL15(a[ 3], a[10]) + MUL15(a[ 4], a[ 9]) + MUL15(a[ 5], a[ 8]) + MUL15(a[ 6], a[ 7])) << 1); t[14] = MUL15(a[ 7], a[ 7]) + ((MUL15(a[ 0], a[14]) + MUL15(a[ 1], a[13]) + MUL15(a[ 2], a[12]) + MUL15(a[ 3], a[11]) + MUL15(a[ 4], a[10]) + MUL15(a[ 5], a[ 9]) + MUL15(a[ 6], a[ 8])) << 1); t[15] = ((MUL15(a[ 0], a[15]) + MUL15(a[ 1], a[14]) + MUL15(a[ 2], a[13]) + MUL15(a[ 3], a[12]) + MUL15(a[ 4], a[11]) + MUL15(a[ 5], a[10]) + MUL15(a[ 6], a[ 9]) + MUL15(a[ 7], a[ 8])) << 1); t[16] = MUL15(a[ 8], a[ 8]) + ((MUL15(a[ 0], a[16]) + MUL15(a[ 1], a[15]) + MUL15(a[ 2], a[14]) + MUL15(a[ 3], a[13]) + MUL15(a[ 4], a[12]) + MUL15(a[ 5], a[11]) + MUL15(a[ 6], a[10]) + MUL15(a[ 7], a[ 9])) << 1); t[17] = ((MUL15(a[ 0], a[17]) + MUL15(a[ 1], a[16]) + MUL15(a[ 2], a[15]) + MUL15(a[ 3], a[14]) + MUL15(a[ 4], a[13]) + MUL15(a[ 5], a[12]) + MUL15(a[ 6], a[11]) + MUL15(a[ 7], a[10]) + MUL15(a[ 8], a[ 9])) << 1); t[18] = MUL15(a[ 9], a[ 9]) + ((MUL15(a[ 0], a[18]) + MUL15(a[ 1], a[17]) + MUL15(a[ 2], a[16]) + MUL15(a[ 3], a[15]) + MUL15(a[ 4], a[14]) + MUL15(a[ 5], a[13]) + MUL15(a[ 6], a[12]) + MUL15(a[ 7], a[11]) + MUL15(a[ 8], a[10])) << 1); t[19] = ((MUL15(a[ 0], a[19]) + MUL15(a[ 1], a[18]) + MUL15(a[ 2], a[17]) + MUL15(a[ 3], a[16]) + MUL15(a[ 4], a[15]) + MUL15(a[ 5], a[14]) + MUL15(a[ 6], a[13]) + MUL15(a[ 7], a[12]) + MUL15(a[ 8], a[11]) + MUL15(a[ 9], a[10])) << 1); t[20] = MUL15(a[10], a[10]) + ((MUL15(a[ 1], a[19]) + MUL15(a[ 2], a[18]) + MUL15(a[ 3], a[17]) + MUL15(a[ 4], a[16]) + MUL15(a[ 5], a[15]) + MUL15(a[ 6], a[14]) + MUL15(a[ 7], a[13]) + MUL15(a[ 8], a[12]) + MUL15(a[ 9], a[11])) << 1); t[21] = ((MUL15(a[ 2], a[19]) + MUL15(a[ 3], a[18]) + MUL15(a[ 4], a[17]) + MUL15(a[ 5], a[16]) + MUL15(a[ 6], a[15]) + MUL15(a[ 7], a[14]) + MUL15(a[ 8], a[13]) + MUL15(a[ 9], a[12]) + MUL15(a[10], a[11])) << 1); t[22] = MUL15(a[11], a[11]) + ((MUL15(a[ 3], a[19]) + MUL15(a[ 4], a[18]) + MUL15(a[ 5], a[17]) + MUL15(a[ 6], a[16]) + MUL15(a[ 7], a[15]) + MUL15(a[ 8], a[14]) + MUL15(a[ 9], a[13]) + MUL15(a[10], a[12])) << 1); t[23] = ((MUL15(a[ 4], a[19]) + MUL15(a[ 5], a[18]) + MUL15(a[ 6], a[17]) + MUL15(a[ 7], a[16]) + MUL15(a[ 8], a[15]) + MUL15(a[ 9], a[14]) + MUL15(a[10], a[13]) + MUL15(a[11], a[12])) << 1); t[24] = MUL15(a[12], a[12]) + ((MUL15(a[ 5], a[19]) + MUL15(a[ 6], a[18]) + MUL15(a[ 7], a[17]) + MUL15(a[ 8], a[16]) + MUL15(a[ 9], a[15]) + MUL15(a[10], a[14]) + MUL15(a[11], a[13])) << 1); t[25] = ((MUL15(a[ 6], a[19]) + MUL15(a[ 7], a[18]) + MUL15(a[ 8], a[17]) + MUL15(a[ 9], a[16]) + MUL15(a[10], a[15]) + MUL15(a[11], a[14]) + MUL15(a[12], a[13])) << 1); t[26] = MUL15(a[13], a[13]) + ((MUL15(a[ 7], a[19]) + MUL15(a[ 8], a[18]) + MUL15(a[ 9], a[17]) + MUL15(a[10], a[16]) + MUL15(a[11], a[15]) + MUL15(a[12], a[14])) << 1); t[27] = ((MUL15(a[ 8], a[19]) + MUL15(a[ 9], a[18]) + MUL15(a[10], a[17]) + MUL15(a[11], a[16]) + MUL15(a[12], a[15]) + MUL15(a[13], a[14])) << 1); t[28] = MUL15(a[14], a[14]) + ((MUL15(a[ 9], a[19]) + MUL15(a[10], a[18]) + MUL15(a[11], a[17]) + MUL15(a[12], a[16]) + MUL15(a[13], a[15])) << 1); t[29] = ((MUL15(a[10], a[19]) + MUL15(a[11], a[18]) + MUL15(a[12], a[17]) + MUL15(a[13], a[16]) + MUL15(a[14], a[15])) << 1); t[30] = MUL15(a[15], a[15]) + ((MUL15(a[11], a[19]) + MUL15(a[12], a[18]) + MUL15(a[13], a[17]) + MUL15(a[14], a[16])) << 1); t[31] = ((MUL15(a[12], a[19]) + MUL15(a[13], a[18]) + MUL15(a[14], a[17]) + MUL15(a[15], a[16])) << 1); t[32] = MUL15(a[16], a[16]) + ((MUL15(a[13], a[19]) + MUL15(a[14], a[18]) + MUL15(a[15], a[17])) << 1); t[33] = ((MUL15(a[14], a[19]) + MUL15(a[15], a[18]) + MUL15(a[16], a[17])) << 1); t[34] = MUL15(a[17], a[17]) + ((MUL15(a[15], a[19]) + MUL15(a[16], a[18])) << 1); t[35] = ((MUL15(a[16], a[19]) + MUL15(a[17], a[18])) << 1); t[36] = MUL15(a[18], a[18]) + ((MUL15(a[17], a[19])) << 1); t[37] = ((MUL15(a[18], a[19])) << 1); t[38] = MUL15(a[19], a[19]); d[39] = _src_ec_ec_p256_m15_cnorm13(d, t, 39); } #endif /* * Modulus for field _src_ec_ec_p256_m15_cF256 (field for point coordinates in curve P-256). */ static const uint32_t _src_ec_ec_p256_m15_cF256[] = { 0x1FFF, 0x1FFF, 0x1FFF, 0x1FFF, 0x1FFF, 0x1FFF, 0x1FFF, 0x001F, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0400, 0x0000, 0x0000, 0x1FF8, 0x1FFF, 0x01FF }; /* * The 'b' curve equation coefficient for P-256. */ static const uint32_t _src_ec_ec_p256_m15_cP256_B[] = { 0x004B, 0x1E93, 0x0F89, 0x1C78, 0x03BC, 0x187B, 0x114E, 0x1619, 0x1D06, 0x0328, 0x01AF, 0x0D31, 0x1557, 0x15DE, 0x1ECF, 0x127C, 0x0A3A, 0x0EC5, 0x118D, 0x00B5 }; /* * Perform a "short reduction" in field _src_ec_ec_p256_m15_cF256 (field for curve P-256). * The source value should be less than 262 bits; on output, it will * be at most 257 bits, and less than twice the modulus. */ static void reduce_f256(uint32_t *d) { uint32_t x; x = d[19] >> 9; d[19] &= 0x01FF; d[17] += x << 3; d[14] -= x << 10; d[7] -= x << 5; d[0] += x; _src_ec_ec_p256_m15_cnorm13(d, d, 20); } /* * Perform a "final reduction" in field _src_ec_ec_p256_m15_cF256 (field for curve P-256). * The source value must be less than twice the modulus. If the value * is not lower than the modulus, then the modulus is subtracted and * this function returns 1; otherwise, it leaves it untouched and it * returns 0. */ static uint32_t _src_ec_ec_p256_m15_creduce_final_f256(uint32_t *d) { uint32_t t[20]; uint32_t cc; int i; memcpy(t, d, sizeof t); cc = 0; for (i = 0; i < 20; i ++) { uint32_t w; w = t[i] - _src_ec_ec_p256_m15_cF256[i] - cc; cc = w >> 31; t[i] = w & 0x1FFF; } cc ^= 1; CCOPY(cc, d, t, sizeof t); return cc; } /* * Perform a multiplication of two integers modulo * 2^256-2^224+2^192+2^96-1 (for NIST curve P-256). Operands are arrays * of 20 words, each containing 13 bits of data, in little-endian order. * On input, upper word may be up to 13 bits (hence value up to 2^260-1); * on output, value fits on 257 bits and is lower than twice the modulus. */ static void _src_ec_ec_p256_m15_cmul_f256(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[40], cc; int i; /* * Compute raw multiplication. All result words fit in 13 bits * each. */ _src_ec_ec_p256_m15_cmul20(t, a, b); /* * Modular reduction: each high word in added/subtracted where * necessary. * * The modulus is: * p = 2^256 - 2^224 + 2^192 + 2^96 - 1 * Therefore: * 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p * * For a word x at bit offset n (n >= 256), we have: * x*2^n = x*2^(n-32) - x*2^(n-64) * - x*2^(n - 160) + x*2^(n-256) mod p * * Thus, we can nullify the high word if we reinject it at some * proper emplacements. */ for (i = 39; i >= 20; i --) { uint32_t x; x = t[i]; t[i - 2] += ARSH(x, 6); t[i - 3] += (x << 7) & 0x1FFF; t[i - 4] -= ARSH(x, 12); t[i - 5] -= (x << 1) & 0x1FFF; t[i - 12] -= ARSH(x, 4); t[i - 13] -= (x << 9) & 0x1FFF; t[i - 19] += ARSH(x, 9); t[i - 20] += (x << 4) & 0x1FFF; } /* * Propagate carries. This is a signed propagation, and the * result may be negative. The loop above may enlarge values, * but not two much: worst case is the chain involving t[i - 3], * in which a value may be added to itself up to 7 times. Since * starting values are 13-bit each, all words fit on 20 bits * (21 to account for the sign bit). */ cc = _src_ec_ec_p256_m15_cnorm13(t, t, 20); /* * Perform modular reduction again for the bits beyond 256 (the carry * and the bits 256..259). Since the largest shift below is by 10 * bits, and the values fit on 21 bits, values fit in 32-bit words, * thereby allowing injecting full word values. */ cc = (cc << 4) | (t[19] >> 9); t[19] &= 0x01FF; t[17] += cc << 3; t[14] -= cc << 10; t[7] -= cc << 5; t[0] += cc; /* * If the carry is negative, then after carry propagation, we may * end up with a value which is negative, and we don't want that. * Thus, in that case, we add the modulus. Note that the subtraction * result, when the carry is negative, is always smaller than the * modulus, so the extra addition will not make the value exceed * twice the modulus. */ cc >>= 31; t[0] -= cc; t[7] += cc << 5; t[14] += cc << 10; t[17] -= cc << 3; t[19] += cc << 9; _src_ec_ec_p256_m15_cnorm13(d, t, 20); } /* * Square an integer modulo 2^256-2^224+2^192+2^96-1 (for NIST curve * P-256). Operand is an array of 20 words, each containing 13 bits of * data, in little-endian order. On input, upper word may be up to 13 * bits (hence value up to 2^260-1); on output, value fits on 257 bits * and is lower than twice the modulus. */ static void _src_ec_ec_p256_m15_csquare_f256(uint32_t *d, const uint32_t *a) { uint32_t t[40], cc; int i; /* * Compute raw square. All result words fit in 13 bits each. */ _src_ec_ec_p256_m15_csquare20(t, a); /* * Modular reduction: each high word in added/subtracted where * necessary. * * The modulus is: * p = 2^256 - 2^224 + 2^192 + 2^96 - 1 * Therefore: * 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p * * For a word x at bit offset n (n >= 256), we have: * x*2^n = x*2^(n-32) - x*2^(n-64) * - x*2^(n - 160) + x*2^(n-256) mod p * * Thus, we can nullify the high word if we reinject it at some * proper emplacements. */ for (i = 39; i >= 20; i --) { uint32_t x; x = t[i]; t[i - 2] += ARSH(x, 6); t[i - 3] += (x << 7) & 0x1FFF; t[i - 4] -= ARSH(x, 12); t[i - 5] -= (x << 1) & 0x1FFF; t[i - 12] -= ARSH(x, 4); t[i - 13] -= (x << 9) & 0x1FFF; t[i - 19] += ARSH(x, 9); t[i - 20] += (x << 4) & 0x1FFF; } /* * Propagate carries. This is a signed propagation, and the * result may be negative. The loop above may enlarge values, * but not two much: worst case is the chain involving t[i - 3], * in which a value may be added to itself up to 7 times. Since * starting values are 13-bit each, all words fit on 20 bits * (21 to account for the sign bit). */ cc = _src_ec_ec_p256_m15_cnorm13(t, t, 20); /* * Perform modular reduction again for the bits beyond 256 (the carry * and the bits 256..259). Since the largest shift below is by 10 * bits, and the values fit on 21 bits, values fit in 32-bit words, * thereby allowing injecting full word values. */ cc = (cc << 4) | (t[19] >> 9); t[19] &= 0x01FF; t[17] += cc << 3; t[14] -= cc << 10; t[7] -= cc << 5; t[0] += cc; /* * If the carry is negative, then after carry propagation, we may * end up with a value which is negative, and we don't want that. * Thus, in that case, we add the modulus. Note that the subtraction * result, when the carry is negative, is always smaller than the * modulus, so the extra addition will not make the value exceed * twice the modulus. */ cc >>= 31; t[0] -= cc; t[7] += cc << 5; t[14] += cc << 10; t[17] -= cc << 3; t[19] += cc << 9; _src_ec_ec_p256_m15_cnorm13(d, t, 20); } /* * Jacobian coordinates for a point in P-256: affine coordinates (X,Y) * are such that: * X = x / z^2 * Y = y / z^3 * For the point at infinity, z = 0. * Each point thus admits many possible representations. * * Coordinates are represented in arrays of 32-bit integers, each holding * 13 bits of data. Values may also be slightly greater than the modulus, * but they will always be lower than twice the modulus. */ typedef struct { uint32_t x[20]; uint32_t y[20]; uint32_t z[20]; } p256__src_ec_ec_p256_m15_cjacobian; /* * Convert a point to affine coordinates: * - If the point is the point at infinity, then all three coordinates * are set to 0. * - Otherwise, the 'z' coordinate is set to 1, and the 'x' and 'y' * coordinates are the 'X' and 'Y' affine coordinates. * The coordinates are guaranteed to be lower than the modulus. */ static void _src_ec_ec_p256_m15_cp256_to_affine(p256__src_ec_ec_p256_m15_cjacobian *P) { uint32_t t1[20], t2[20]; int i; /* * Invert z with a modular exponentiation: the modulus is * p = 2^256 - 2^224 + 2^192 + 2^96 - 1, and the exponent is * p-2. Exponent bit pattern (from high to low) is: * - 32 bits of value 1 * - 31 bits of value 0 * - 1 bit of value 1 * - 96 bits of value 0 * - 94 bits of value 1 * - 1 bit of value 0 * - 1 bit of value 1 * Thus, we precompute z^(2^31-1) to speed things up. * * If z = 0 (point at infinity) then the modular exponentiation * will yield 0, which leads to the expected result (all three * coordinates set to 0). */ /* * A simple square-and-multiply for z^(2^31-1). We could save about * two dozen multiplications here with an addition chain, but * this would require a bit more code, and extra stack buffers. */ memcpy(t1, P->z, sizeof P->z); for (i = 0; i < 30; i ++) { _src_ec_ec_p256_m15_csquare_f256(t1, t1); _src_ec_ec_p256_m15_cmul_f256(t1, t1, P->z); } /* * Square-and-multiply. Apart from the squarings, we have a few * multiplications to set bits to 1; we multiply by the original z * for setting 1 bit, and by t1 for setting 31 bits. */ memcpy(t2, P->z, sizeof P->z); for (i = 1; i < 256; i ++) { _src_ec_ec_p256_m15_csquare_f256(t2, t2); switch (i) { case 31: case 190: case 221: case 252: _src_ec_ec_p256_m15_cmul_f256(t2, t2, t1); break; case 63: case 253: case 255: _src_ec_ec_p256_m15_cmul_f256(t2, t2, P->z); break; } } /* * Now that we have 1/z, multiply x by 1/z^2 and y by 1/z^3. */ _src_ec_ec_p256_m15_cmul_f256(t1, t2, t2); _src_ec_ec_p256_m15_cmul_f256(P->x, t1, P->x); _src_ec_ec_p256_m15_cmul_f256(t1, t1, t2); _src_ec_ec_p256_m15_cmul_f256(P->y, t1, P->y); _src_ec_ec_p256_m15_creduce_final_f256(P->x); _src_ec_ec_p256_m15_creduce_final_f256(P->y); /* * Multiply z by 1/z. If z = 0, then this will yield 0, otherwise * this will set z to 1. */ _src_ec_ec_p256_m15_cmul_f256(P->z, P->z, t2); _src_ec_ec_p256_m15_creduce_final_f256(P->z); } /* * Double a point in P-256. This function works for all valid points, * including the point at infinity. */ static void _src_ec_ec_p256_m15_cp256_double(p256__src_ec_ec_p256_m15_cjacobian *Q) { /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * These formulas work for all points, including points of order 2 * and points at infinity: * - If y = 0 then z' = 0. But there is no such point in P-256 * anyway. * - If z = 0 then z' = 0. */ uint32_t t1[20], t2[20], t3[20], t4[20]; int i; /* * Compute z^2 in t1. */ _src_ec_ec_p256_m15_csquare_f256(t1, Q->z); /* * Compute x-z^2 in t2 and x+z^2 in t1. */ for (i = 0; i < 20; i ++) { t2[i] = (_src_ec_ec_p256_m15_cF256[i] << 1) + Q->x[i] - t1[i]; t1[i] += Q->x[i]; } _src_ec_ec_p256_m15_cnorm13(t1, t1, 20); _src_ec_ec_p256_m15_cnorm13(t2, t2, 20); /* * Compute 3*(x+z^2)*(x-z^2) in t1. */ _src_ec_ec_p256_m15_cmul_f256(t3, t1, t2); for (i = 0; i < 20; i ++) { t1[i] = MUL15(3, t3[i]); } _src_ec_ec_p256_m15_cnorm13(t1, t1, 20); /* * Compute 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_p256_m15_csquare_f256(t3, Q->y); for (i = 0; i < 20; i ++) { t3[i] <<= 1; } _src_ec_ec_p256_m15_cnorm13(t3, t3, 20); _src_ec_ec_p256_m15_cmul_f256(t2, Q->x, t3); for (i = 0; i < 20; i ++) { t2[i] <<= 1; } _src_ec_ec_p256_m15_cnorm13(t2, t2, 20); reduce_f256(t2); /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_p256_m15_csquare_f256(Q->x, t1); for (i = 0; i < 20; i ++) { Q->x[i] += (_src_ec_ec_p256_m15_cF256[i] << 2) - (t2[i] << 1); } _src_ec_ec_p256_m15_cnorm13(Q->x, Q->x, 20); reduce_f256(Q->x); /* * Compute z' = 2*y*z. */ _src_ec_ec_p256_m15_cmul_f256(t4, Q->y, Q->z); for (i = 0; i < 20; i ++) { Q->z[i] = t4[i] << 1; } _src_ec_ec_p256_m15_cnorm13(Q->z, Q->z, 20); reduce_f256(Q->z); /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ for (i = 0; i < 20; i ++) { t2[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - Q->x[i]; } _src_ec_ec_p256_m15_cnorm13(t2, t2, 20); _src_ec_ec_p256_m15_cmul_f256(Q->y, t1, t2); _src_ec_ec_p256_m15_csquare_f256(t4, t3); for (i = 0; i < 20; i ++) { Q->y[i] += (_src_ec_ec_p256_m15_cF256[i] << 2) - (t4[i] << 1); } _src_ec_ec_p256_m15_cnorm13(Q->y, Q->y, 20); reduce_f256(Q->y); } /* * Add point P2 to point P1. * * This function computes the wrong result in the following cases: * * - If P1 == 0 but P2 != 0 * - If P1 != 0 but P2 == 0 * - If P1 == P2 * * In all three cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate * - P1 == 0 and P2 == 0 * - The Y coordinate of one of the points is 0 and the other point is * the point at infinity. * * The third case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 and P2 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. */ static uint32_t _src_ec_ec_p256_m15_cp256_add(p256__src_ec_ec_p256_m15_cjacobian *P1, const p256__src_ec_ec_p256_m15_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 */ uint32_t t1[20], t2[20], t3[20], t4[20], t5[20], t6[20], t7[20]; uint32_t ret; int i; /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_p256_m15_csquare_f256(t3, P2->z); _src_ec_ec_p256_m15_cmul_f256(t1, P1->x, t3); _src_ec_ec_p256_m15_cmul_f256(t4, P2->z, t3); _src_ec_ec_p256_m15_cmul_f256(t3, P1->y, t4); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m15_csquare_f256(t4, P1->z); _src_ec_ec_p256_m15_cmul_f256(t2, P2->x, t4); _src_ec_ec_p256_m15_cmul_f256(t5, P1->z, t4); _src_ec_ec_p256_m15_cmul_f256(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ for (i = 0; i < 20; i ++) { t2[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t1[i]; t4[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t3[i]; } _src_ec_ec_p256_m15_cnorm13(t2, t2, 20); _src_ec_ec_p256_m15_cnorm13(t4, t4, 20); reduce_f256(t4); _src_ec_ec_p256_m15_creduce_final_f256(t4); ret = 0; for (i = 0; i < 20; i ++) { ret |= t4[i]; } ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m15_csquare_f256(t7, t2); _src_ec_ec_p256_m15_cmul_f256(t6, t1, t7); _src_ec_ec_p256_m15_cmul_f256(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m15_csquare_f256(P1->x, t4); for (i = 0; i < 20; i ++) { P1->x[i] += (_src_ec_ec_p256_m15_cF256[i] << 3) - t5[i] - (t6[i] << 1); } _src_ec_ec_p256_m15_cnorm13(P1->x, P1->x, 20); reduce_f256(P1->x); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ for (i = 0; i < 20; i ++) { t6[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - P1->x[i]; } _src_ec_ec_p256_m15_cnorm13(t6, t6, 20); _src_ec_ec_p256_m15_cmul_f256(P1->y, t4, t6); _src_ec_ec_p256_m15_cmul_f256(t1, t5, t3); for (i = 0; i < 20; i ++) { P1->y[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t1[i]; } _src_ec_ec_p256_m15_cnorm13(P1->y, P1->y, 20); reduce_f256(P1->y); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m15_cmul_f256(t1, P1->z, P2->z); _src_ec_ec_p256_m15_cmul_f256(P1->z, t1, t2); return ret; } /* * Add point P2 to point P1. This is a specialised function for the * case when P2 is a non-zero point in affine coordinate. * * This function computes the wrong result in the following cases: * * - If P1 == 0 * - If P1 == P2 * * In both cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate * - The Y coordinate of P2 is 0 and P1 is the point at infinity. * * The second case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. */ static uint32_t _src_ec_ec_p256_m15_c_src_ec_ec_p256_m15_cp256_add_mixed(p256__src_ec_ec_p256_m15_cjacobian *P1, const p256__src_ec_ec_p256_m15_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 */ uint32_t t1[20], t2[20], t3[20], t4[20], t5[20], t6[20], t7[20]; uint32_t ret; int i; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m15_csquare_f256(t4, P1->z); _src_ec_ec_p256_m15_cmul_f256(t2, P2->x, t4); _src_ec_ec_p256_m15_cmul_f256(t5, P1->z, t4); _src_ec_ec_p256_m15_cmul_f256(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ for (i = 0; i < 20; i ++) { t2[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t1[i]; t4[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t3[i]; } _src_ec_ec_p256_m15_cnorm13(t2, t2, 20); _src_ec_ec_p256_m15_cnorm13(t4, t4, 20); reduce_f256(t4); _src_ec_ec_p256_m15_creduce_final_f256(t4); ret = 0; for (i = 0; i < 20; i ++) { ret |= t4[i]; } ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m15_csquare_f256(t7, t2); _src_ec_ec_p256_m15_cmul_f256(t6, t1, t7); _src_ec_ec_p256_m15_cmul_f256(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m15_csquare_f256(P1->x, t4); for (i = 0; i < 20; i ++) { P1->x[i] += (_src_ec_ec_p256_m15_cF256[i] << 3) - t5[i] - (t6[i] << 1); } _src_ec_ec_p256_m15_cnorm13(P1->x, P1->x, 20); reduce_f256(P1->x); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ for (i = 0; i < 20; i ++) { t6[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - P1->x[i]; } _src_ec_ec_p256_m15_cnorm13(t6, t6, 20); _src_ec_ec_p256_m15_cmul_f256(P1->y, t4, t6); _src_ec_ec_p256_m15_cmul_f256(t1, t5, t3); for (i = 0; i < 20; i ++) { P1->y[i] += (_src_ec_ec_p256_m15_cF256[i] << 1) - t1[i]; } _src_ec_ec_p256_m15_cnorm13(P1->y, P1->y, 20); reduce_f256(P1->y); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m15_cmul_f256(P1->z, P1->z, t2); return ret; } /* * Decode a P-256 point. This function does not support the point at * infinity. Returned value is 0 if the point is invalid, 1 otherwise. */ static uint32_t _src_ec_ec_p256_m15_cp256_decode(p256__src_ec_ec_p256_m15_cjacobian *P, const void *src, size_t len) { const unsigned char *buf; uint32_t tx[20], ty[20], t1[20], t2[20]; uint32_t bad; int i; if (len != 65) { return 0; } buf = (const unsigned char*)src; /* * First byte must be 0x04 (uncompressed format). We could support * "hybrid format" (first byte is 0x06 or 0x07, and encodes the * least significant bit of the Y coordinate), but it is explicitly * forbidden by RFC 5480 (section 2.2). */ bad = NEQ(buf[0], 0x04); /* * Decode the coordinates, and check that they are both lower * than the modulus. */ tx[19] = be8_to_le13(tx, buf + 1, 32); ty[19] = be8_to_le13(ty, buf + 33, 32); bad |= _src_ec_ec_p256_m15_creduce_final_f256(tx); bad |= _src_ec_ec_p256_m15_creduce_final_f256(ty); /* * Check curve equation. */ _src_ec_ec_p256_m15_csquare_f256(t1, tx); _src_ec_ec_p256_m15_cmul_f256(t1, tx, t1); _src_ec_ec_p256_m15_csquare_f256(t2, ty); for (i = 0; i < 20; i ++) { t1[i] += (_src_ec_ec_p256_m15_cF256[i] << 3) - MUL15(3, tx[i]) + _src_ec_ec_p256_m15_cP256_B[i] - t2[i]; } _src_ec_ec_p256_m15_cnorm13(t1, t1, 20); reduce_f256(t1); _src_ec_ec_p256_m15_creduce_final_f256(t1); for (i = 0; i < 20; i ++) { bad |= t1[i]; } /* * Copy coordinates to the point structure. */ memcpy(P->x, tx, sizeof tx); memcpy(P->y, ty, sizeof ty); memset(P->z, 0, sizeof P->z); P->z[0] = 1; return EQ(bad, 0); } /* * Encode a point into a buffer. This function assumes that the point is * valid, in affine coordinates, and not the point at infinity. */ static void _src_ec_ec_p256_m15_cp256_encode(void *dst, const p256__src_ec_ec_p256_m15_cjacobian *P) { unsigned char *buf; buf = (unsigned char*)dst; buf[0] = 0x04; le13_to_be8(buf + 1, 32, P->x); le13_to_be8(buf + 33, 32, P->y); } /* * Multiply a curve point by an integer. The integer is assumed to be * lower than the curve order, and the base point must not be the point * at infinity. */ static void _src_ec_ec_p256_m15_cp256_mul(p256__src_ec_ec_p256_m15_cjacobian *P, const unsigned char *x, size_t xlen) { /* * qz is a flag that is initially 1, and remains equal to 1 * as long as the point is the point at infinity. * * We use a 2-bit window to handle multiplier bits by pairs. * The precomputed window really is the points P2 and P3. */ uint32_t qz; p256__src_ec_ec_p256_m15_cjacobian P2, P3, Q, T, U; /* * Compute window values. */ P2 = *P; _src_ec_ec_p256_m15_cp256_double(&P2); P3 = *P; _src_ec_ec_p256_m15_cp256_add(&P3, &P2); /* * We start with Q = 0. We process multiplier bits 2 by 2. */ memset(&Q, 0, sizeof Q); qz = 1; while (xlen -- > 0) { int k; for (k = 6; k >= 0; k -= 2) { uint32_t bits; uint32_t bnz; _src_ec_ec_p256_m15_cp256_double(&Q); _src_ec_ec_p256_m15_cp256_double(&Q); T = *P; U = Q; bits = (*x >> k) & (uint32_t)3; bnz = NEQ(bits, 0); CCOPY(EQ(bits, 2), &T, &P2, sizeof T); CCOPY(EQ(bits, 3), &T, &P3, sizeof T); _src_ec_ec_p256_m15_cp256_add(&U, &T); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; } x ++; } *P = Q; } /* * Precomputed window: k*G points, where G is the curve generator, and k * is an integer from 1 to 15 (inclusive). The X and Y coordinates of * the point are encoded as 20 words of 13 bits each (little-endian * order); 13-bit words are then grouped 2-by-2 into 32-bit words * (little-endian order within each word). */ static const uint32_t _src_ec_ec_p256_m15_cGwin[15][20] = { { 0x04C60296, 0x02721176, 0x19D00F4A, 0x102517AC, 0x13B8037D, 0x0748103C, 0x1E730E56, 0x08481FE2, 0x0F97012C, 0x00D605F4, 0x1DFA11F5, 0x0C801A0D, 0x0F670CBB, 0x0AED0CC5, 0x115E0E33, 0x181F0785, 0x13F514A7, 0x0FF30E3B, 0x17171E1A, 0x009F18D0 }, { 0x1B341978, 0x16911F11, 0x0D9A1A60, 0x1C4E1FC8, 0x1E040969, 0x096A06B0, 0x091C0030, 0x09EF1A29, 0x18C40D03, 0x00F91C9E, 0x13C313D1, 0x096F0748, 0x011419E0, 0x1CC713A6, 0x1DD31DAD, 0x1EE80C36, 0x1ECD0C69, 0x1A0800A4, 0x08861B8E, 0x000E1DD5 }, { 0x173F1D6C, 0x02CC06F1, 0x14C21FB4, 0x043D1EB6, 0x0F3606B7, 0x1A971C59, 0x1BF71951, 0x01481323, 0x068D0633, 0x00BD12F9, 0x13EA1032, 0x136209E8, 0x1C1E19A7, 0x06C7013E, 0x06C10AB0, 0x14C908BB, 0x05830CE1, 0x1FEF18DD, 0x00620998, 0x010E0D19 }, { 0x18180852, 0x0604111A, 0x0B771509, 0x1B6F0156, 0x00181FE2, 0x1DCC0AF4, 0x16EF0659, 0x11F70E80, 0x11A912D0, 0x01C414D2, 0x027618C6, 0x05840FC6, 0x100215C4, 0x187E0C3B, 0x12771C96, 0x150C0B5D, 0x0FF705FD, 0x07981C67, 0x1AD20C63, 0x01C11C55 }, { 0x1E8113ED, 0x0A940370, 0x12920215, 0x1FA31D6F, 0x1F7C0C82, 0x10CD03F7, 0x02640560, 0x081A0B5E, 0x1BD21151, 0x00A21642, 0x0D0B0DA4, 0x0176113F, 0x04440D1D, 0x001A1360, 0x1068012F, 0x1F141E49, 0x10DF136B, 0x0E4F162B, 0x0D44104A, 0x01C1105F }, { 0x011411A9, 0x01551A4F, 0x0ADA0C6B, 0x01BD0EC8, 0x18120C74, 0x112F1778, 0x099202CB, 0x0C05124B, 0x195316A4, 0x01600685, 0x1E3B1FE2, 0x189014E3, 0x0B5E1FD7, 0x0E0311F8, 0x08E000F7, 0x174E00DE, 0x160702DF, 0x1B5A15BF, 0x03A11237, 0x01D01704 }, { 0x0C3D12A3, 0x0C501C0C, 0x17AD1300, 0x1715003F, 0x03F719F8, 0x18031ED8, 0x1D980667, 0x0F681896, 0x1B7D00BF, 0x011C14CE, 0x0FA000B4, 0x1C3501B0, 0x0D901C55, 0x06790C10, 0x029E0736, 0x0DEB0400, 0x034F183A, 0x030619B4, 0x0DEF0033, 0x00E71AC7 }, { 0x1B7D1393, 0x1B3B1076, 0x0BED1B4D, 0x13011F3A, 0x0E0E1238, 0x156A132B, 0x013A02D3, 0x160A0D01, 0x1CED1EE9, 0x00C5165D, 0x184C157E, 0x08141A83, 0x153C0DA5, 0x1ED70F9D, 0x05170D51, 0x02CF13B8, 0x18AE1771, 0x1B04113F, 0x05EC11E9, 0x015A16B3 }, { 0x04A41EE0, 0x1D1412E4, 0x1C591D79, 0x118511B7, 0x14F00ACB, 0x1AE31E1C, 0x049C0D51, 0x016E061E, 0x1DB71EDF, 0x01D41A35, 0x0E8208FA, 0x14441293, 0x011F1E85, 0x1D54137A, 0x026B114F, 0x151D0832, 0x00A50964, 0x1F9C1E1C, 0x064B12C9, 0x005409D1 }, { 0x062B123F, 0x0C0D0501, 0x183704C3, 0x08E31120, 0x0A2E0A6C, 0x14440FED, 0x090A0D1E, 0x13271964, 0x0B590A3A, 0x019D1D9B, 0x05780773, 0x09770A91, 0x0F770CA3, 0x053F19D4, 0x02C80DED, 0x1A761304, 0x091E0DD9, 0x15D201B8, 0x151109AA, 0x010F0198 }, { 0x05E101D1, 0x072314DD, 0x045F1433, 0x1A041541, 0x10B3142E, 0x01840736, 0x1C1B19DB, 0x098B0418, 0x1DBC083B, 0x007D1444, 0x01511740, 0x11DD1F3A, 0x04ED0E2F, 0x1B4B1A62, 0x10480D04, 0x09E911A2, 0x04211AFA, 0x19140893, 0x04D60CC4, 0x01210648 }, { 0x112703C4, 0x018B1BA1, 0x164C1D50, 0x05160BE0, 0x0BCC1830, 0x01CB1554, 0x13291732, 0x1B2B1918, 0x0DED0817, 0x00E80775, 0x0A2401D3, 0x0BFE08B3, 0x0E531199, 0x058616E9, 0x04770B91, 0x110F0C55, 0x19C11554, 0x0BFB1159, 0x03541C38, 0x000E1C2D }, { 0x10390C01, 0x02BB0751, 0x0AC5098E, 0x096C17AB, 0x03C90E28, 0x10BD18BF, 0x002E1F2D, 0x092B0986, 0x1BD700AC, 0x002E1F20, 0x1E3D1FD8, 0x077718BB, 0x06F919C4, 0x187407ED, 0x11370E14, 0x081E139C, 0x00481ADB, 0x14AB0289, 0x066A0EBE, 0x00C70ED6 }, { 0x0694120B, 0x124E1CC9, 0x0E2F0570, 0x17CF081A, 0x078906AC, 0x066D17CF, 0x1B3207F4, 0x0C5705E9, 0x10001C38, 0x00A919DE, 0x06851375, 0x0F900BD8, 0x080401BA, 0x0EEE0D42, 0x1B8B11EA, 0x0B4519F0, 0x090F18C0, 0x062E1508, 0x0DD909F4, 0x01EB067C }, { 0x0CDC1D5F, 0x0D1818F9, 0x07781636, 0x125B18E8, 0x0D7003AF, 0x13110099, 0x1D9B1899, 0x175C1EB7, 0x0E34171A, 0x01E01153, 0x081A0F36, 0x0B391783, 0x1D1F147E, 0x19CE16D7, 0x11511B21, 0x1F2C10F9, 0x12CA0E51, 0x05A31D39, 0x171A192E, 0x016B0E4F } }; /* * Lookup one of the _src_ec_ec_p256_m15_cGwin[] values, by index. This is constant-time. */ static void _src_ec_ec_p256_m15_clookup__src_ec_ec_p256_m15_cGwin(p256__src_ec_ec_p256_m15_cjacobian *T, uint32_t idx) { uint32_t xy[20]; uint32_t k; size_t u; memset(xy, 0, sizeof xy); for (k = 0; k < 15; k ++) { uint32_t m; m = -EQ(idx, k + 1); for (u = 0; u < 20; u ++) { xy[u] |= m & _src_ec_ec_p256_m15_cGwin[k][u]; } } for (u = 0; u < 10; u ++) { T->x[(u << 1) + 0] = xy[u] & 0xFFFF; T->x[(u << 1) + 1] = xy[u] >> 16; T->y[(u << 1) + 0] = xy[u + 10] & 0xFFFF; T->y[(u << 1) + 1] = xy[u + 10] >> 16; } memset(T->z, 0, sizeof T->z); T->z[0] = 1; } /* * Multiply the generator by an integer. The integer is assumed non-zero * and lower than the curve order. */ static void _src_ec_ec_p256_m15_c_src_ec_ec_p256_m15_cp256_mulgen(p256__src_ec_ec_p256_m15_cjacobian *P, const unsigned char *x, size_t xlen) { /* * qz is a flag that is initially 1, and remains equal to 1 * as long as the point is the point at infinity. * * We use a 4-bit window to handle multiplier bits by groups * of 4. The precomputed window is constant static data, with * points in affine coordinates; we use a constant-time lookup. */ p256__src_ec_ec_p256_m15_cjacobian Q; uint32_t qz; memset(&Q, 0, sizeof Q); qz = 1; while (xlen -- > 0) { int k; unsigned bx; bx = *x ++; for (k = 0; k < 2; k ++) { uint32_t bits; uint32_t bnz; p256__src_ec_ec_p256_m15_cjacobian T, U; _src_ec_ec_p256_m15_cp256_double(&Q); _src_ec_ec_p256_m15_cp256_double(&Q); _src_ec_ec_p256_m15_cp256_double(&Q); _src_ec_ec_p256_m15_cp256_double(&Q); bits = (bx >> 4) & 0x0F; bnz = NEQ(bits, 0); _src_ec_ec_p256_m15_clookup__src_ec_ec_p256_m15_cGwin(&T, bits); U = Q; _src_ec_ec_p256_m15_c_src_ec_ec_p256_m15_cp256_add_mixed(&U, &T); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; bx <<= 4; } } *P = Q; } static const unsigned char _src_ec_ec_p256_m15_cP256_G[] = { 0x04, 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, 0x4F, 0xE3, 0x42, 0xE2, 0xFE, 0x1A, 0x7F, 0x9B, 0x8E, 0xE7, 0xEB, 0x4A, 0x7C, 0x0F, 0x9E, 0x16, 0x2B, 0xCE, 0x33, 0x57, 0x6B, 0x31, 0x5E, 0xCE, 0xCB, 0xB6, 0x40, 0x68, 0x37, 0xBF, 0x51, 0xF5 }; static const unsigned char _src_ec_ec_p256_m15_cP256_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51 }; static const unsigned char * _src_ec_ec_p256_m15_capi_generator(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m15_cP256_G; return _src_ec_ec_p256_m15_cP256_G; } static const unsigned char * _src_ec_ec_p256_m15_capi_order(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m15_cP256_N; return _src_ec_ec_p256_m15_cP256_N; } static size_t _src_ec_ec_p256_m15_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 1; } static uint32_t _src_ec_ec_p256_m15_capi_mul(unsigned char *G, size_t Glen, const unsigned char *x, size_t xlen, int curve) { uint32_t r; p256__src_ec_ec_p256_m15_cjacobian P; (void)curve; if (Glen != 65) { return 0; } r = _src_ec_ec_p256_m15_cp256_decode(&P, G, Glen); _src_ec_ec_p256_m15_cp256_mul(&P, x, xlen); _src_ec_ec_p256_m15_cp256_to_affine(&P); _src_ec_ec_p256_m15_cp256_encode(G, &P); return r; } static size_t _src_ec_ec_p256_m15_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { p256__src_ec_ec_p256_m15_cjacobian P; (void)curve; _src_ec_ec_p256_m15_c_src_ec_ec_p256_m15_cp256_mulgen(&P, x, xlen); _src_ec_ec_p256_m15_cp256_to_affine(&P); _src_ec_ec_p256_m15_cp256_encode(R, &P); return 65; } static uint32_t _src_ec_ec_p256_m15_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { p256__src_ec_ec_p256_m15_cjacobian P, Q; uint32_t r, t, z; int i; (void)curve; if (len != 65) { return 0; } r = _src_ec_ec_p256_m15_cp256_decode(&P, A, len); _src_ec_ec_p256_m15_cp256_mul(&P, x, xlen); if (B == NULL) { _src_ec_ec_p256_m15_c_src_ec_ec_p256_m15_cp256_mulgen(&Q, y, ylen); } else { r &= _src_ec_ec_p256_m15_cp256_decode(&Q, B, len); _src_ec_ec_p256_m15_cp256_mul(&Q, y, ylen); } /* * The final addition may fail in case both points are equal. */ t = _src_ec_ec_p256_m15_cp256_add(&P, &Q); _src_ec_ec_p256_m15_creduce_final_f256(P.z); z = 0; for (i = 0; i < 20; i ++) { z |= P.z[i]; } z = EQ(z, 0); _src_ec_ec_p256_m15_cp256_double(&Q); /* * If z is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * z = 0, t = 0 return P (normal addition) * z = 0, t = 1 return P (normal addition) * z = 1, t = 0 return Q (a 'double' case) * z = 1, t = 1 report an error (P+Q = 0) */ CCOPY(z & ~t, &P, &Q, sizeof Q); _src_ec_ec_p256_m15_cp256_to_affine(&P); _src_ec_ec_p256_m15_cp256_encode(A, &P); r &= ~(z & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_p256_m15 = { (uint32_t)0x00800000, &_src_ec_ec_p256_m15_capi_generator, &_src_ec_ec_p256_m15_capi_order, &_src_ec_ec_p256_m15_capi_xoff, &_src_ec_ec_p256_m15_capi_mul, &_src_ec_ec_p256_m15_capi_mulgen, &_src_ec_ec_p256_m15_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * If BR_NO_ARITH_SHIFT is undefined, or defined to 0, then we _assume_ * that right-shifting a signed negative integer copies the sign bit * (arithmetic right-shift). This is "implementation-defined behaviour", * i.e. it is not undefined, but it may differ between compilers. Each * compiler is supposed to document its behaviour in that respect. GCC * explicitly defines that an arithmetic right shift is used. We expect * all other compilers to do the same, because underlying CPU offer an * arithmetic right shift opcode that could not be used otherwise. */ #if BR_NO_ARITH_SHIFT #define ARSH(x, n) (((uint32_t)(x) >> (n)) \ | ((-((uint32_t)(x) >> 31)) << (32 - (n)))) #define ARSHW(x, n) (((uint64_t)(x) >> (n)) \ | ((-((uint64_t)(x) >> 63)) << (64 - (n)))) #else #define ARSH(x, n) ((*(int32_t *)&(x)) >> (n)) #define ARSHW(x, n) ((*(int64_t *)&(x)) >> (n)) #endif /* * Convert an integer from unsigned big-endian encoding to a sequence of * 30-bit words in little-endian order. The final "partial" word is * returned. */ static uint32_t be8_to_le30(uint32_t *dst, const unsigned char *src, size_t len) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { uint32_t b; b = src[len]; if (acc_len < 22) { acc |= b << acc_len; acc_len += 8; } else { *dst ++ = (acc | (b << acc_len)) & 0x3FFFFFFF; acc = b >> (30 - acc_len); acc_len -= 22; } } return acc; } /* * Convert an integer (30-bit words, little-endian) to unsigned * big-endian encoding. The total encoding length is provided; all * the destination bytes will be filled. */ static void le30_to_be8(unsigned char *dst, size_t len, const uint32_t *src) { uint32_t acc; int acc_len; acc = 0; acc_len = 0; while (len -- > 0) { if (acc_len < 8) { uint32_t w; w = *src ++; dst[len] = (unsigned char)(acc | (w << acc_len)); acc = w >> (8 - acc_len); acc_len += 22; } else { dst[len] = (unsigned char)acc; acc >>= 8; acc_len -= 8; } } } /* * Multiply two integers. Source integers are represented as arrays of * nine 30-bit words, for values up to 2^270-1. Result is encoded over * 18 words of 30 bits each. */ static void _src_ec_ec_p256_m31_cmul9(uint32_t *d, const uint32_t *a, const uint32_t *b) { /* * Maximum intermediate result is no more than * 10376293531797946367, which fits in 64 bits. Reason: * * 10376293531797946367 = 9 * (2^30-1)^2 + 9663676406 * 10376293531797946367 < 9663676407 * 2^30 * * Thus, adding together 9 products of 30-bit integers, with * a carry of at most 9663676406, yields an integer that fits * on 64 bits and generates a carry of at most 9663676406. */ uint64_t t[17]; uint64_t cc; int i; t[ 0] = MUL31(a[0], b[0]); t[ 1] = MUL31(a[0], b[1]) + MUL31(a[1], b[0]); t[ 2] = MUL31(a[0], b[2]) + MUL31(a[1], b[1]) + MUL31(a[2], b[0]); t[ 3] = MUL31(a[0], b[3]) + MUL31(a[1], b[2]) + MUL31(a[2], b[1]) + MUL31(a[3], b[0]); t[ 4] = MUL31(a[0], b[4]) + MUL31(a[1], b[3]) + MUL31(a[2], b[2]) + MUL31(a[3], b[1]) + MUL31(a[4], b[0]); t[ 5] = MUL31(a[0], b[5]) + MUL31(a[1], b[4]) + MUL31(a[2], b[3]) + MUL31(a[3], b[2]) + MUL31(a[4], b[1]) + MUL31(a[5], b[0]); t[ 6] = MUL31(a[0], b[6]) + MUL31(a[1], b[5]) + MUL31(a[2], b[4]) + MUL31(a[3], b[3]) + MUL31(a[4], b[2]) + MUL31(a[5], b[1]) + MUL31(a[6], b[0]); t[ 7] = MUL31(a[0], b[7]) + MUL31(a[1], b[6]) + MUL31(a[2], b[5]) + MUL31(a[3], b[4]) + MUL31(a[4], b[3]) + MUL31(a[5], b[2]) + MUL31(a[6], b[1]) + MUL31(a[7], b[0]); t[ 8] = MUL31(a[0], b[8]) + MUL31(a[1], b[7]) + MUL31(a[2], b[6]) + MUL31(a[3], b[5]) + MUL31(a[4], b[4]) + MUL31(a[5], b[3]) + MUL31(a[6], b[2]) + MUL31(a[7], b[1]) + MUL31(a[8], b[0]); t[ 9] = MUL31(a[1], b[8]) + MUL31(a[2], b[7]) + MUL31(a[3], b[6]) + MUL31(a[4], b[5]) + MUL31(a[5], b[4]) + MUL31(a[6], b[3]) + MUL31(a[7], b[2]) + MUL31(a[8], b[1]); t[10] = MUL31(a[2], b[8]) + MUL31(a[3], b[7]) + MUL31(a[4], b[6]) + MUL31(a[5], b[5]) + MUL31(a[6], b[4]) + MUL31(a[7], b[3]) + MUL31(a[8], b[2]); t[11] = MUL31(a[3], b[8]) + MUL31(a[4], b[7]) + MUL31(a[5], b[6]) + MUL31(a[6], b[5]) + MUL31(a[7], b[4]) + MUL31(a[8], b[3]); t[12] = MUL31(a[4], b[8]) + MUL31(a[5], b[7]) + MUL31(a[6], b[6]) + MUL31(a[7], b[5]) + MUL31(a[8], b[4]); t[13] = MUL31(a[5], b[8]) + MUL31(a[6], b[7]) + MUL31(a[7], b[6]) + MUL31(a[8], b[5]); t[14] = MUL31(a[6], b[8]) + MUL31(a[7], b[7]) + MUL31(a[8], b[6]); t[15] = MUL31(a[7], b[8]) + MUL31(a[8], b[7]); t[16] = MUL31(a[8], b[8]); /* * Propagate carries. */ cc = 0; for (i = 0; i < 17; i ++) { uint64_t w; w = t[i] + cc; d[i] = (uint32_t)w & 0x3FFFFFFF; cc = w >> 30; } d[17] = (uint32_t)cc; } /* * Square a 270-bit integer, represented as an array of nine 30-bit words. * Result uses 18 words of 30 bits each. */ static void _src_ec_ec_p256_m31_csquare9(uint32_t *d, const uint32_t *a) { uint64_t t[17]; uint64_t cc; int i; t[ 0] = MUL31(a[0], a[0]); t[ 1] = ((MUL31(a[0], a[1])) << 1); t[ 2] = MUL31(a[1], a[1]) + ((MUL31(a[0], a[2])) << 1); t[ 3] = ((MUL31(a[0], a[3]) + MUL31(a[1], a[2])) << 1); t[ 4] = MUL31(a[2], a[2]) + ((MUL31(a[0], a[4]) + MUL31(a[1], a[3])) << 1); t[ 5] = ((MUL31(a[0], a[5]) + MUL31(a[1], a[4]) + MUL31(a[2], a[3])) << 1); t[ 6] = MUL31(a[3], a[3]) + ((MUL31(a[0], a[6]) + MUL31(a[1], a[5]) + MUL31(a[2], a[4])) << 1); t[ 7] = ((MUL31(a[0], a[7]) + MUL31(a[1], a[6]) + MUL31(a[2], a[5]) + MUL31(a[3], a[4])) << 1); t[ 8] = MUL31(a[4], a[4]) + ((MUL31(a[0], a[8]) + MUL31(a[1], a[7]) + MUL31(a[2], a[6]) + MUL31(a[3], a[5])) << 1); t[ 9] = ((MUL31(a[1], a[8]) + MUL31(a[2], a[7]) + MUL31(a[3], a[6]) + MUL31(a[4], a[5])) << 1); t[10] = MUL31(a[5], a[5]) + ((MUL31(a[2], a[8]) + MUL31(a[3], a[7]) + MUL31(a[4], a[6])) << 1); t[11] = ((MUL31(a[3], a[8]) + MUL31(a[4], a[7]) + MUL31(a[5], a[6])) << 1); t[12] = MUL31(a[6], a[6]) + ((MUL31(a[4], a[8]) + MUL31(a[5], a[7])) << 1); t[13] = ((MUL31(a[5], a[8]) + MUL31(a[6], a[7])) << 1); t[14] = MUL31(a[7], a[7]) + ((MUL31(a[6], a[8])) << 1); t[15] = ((MUL31(a[7], a[8])) << 1); t[16] = MUL31(a[8], a[8]); /* * Propagate carries. */ cc = 0; for (i = 0; i < 17; i ++) { uint64_t w; w = t[i] + cc; d[i] = (uint32_t)w & 0x3FFFFFFF; cc = w >> 30; } d[17] = (uint32_t)cc; } /* * Base field modulus for P-256. */ static const uint32_t _src_ec_ec_p256_m31_cF256[] = { 0x3FFFFFFF, 0x3FFFFFFF, 0x3FFFFFFF, 0x0000003F, 0x00000000, 0x00000000, 0x00001000, 0x3FFFC000, 0x0000FFFF }; /* * The 'b' curve equation coefficient for P-256. */ static const uint32_t _src_ec_ec_p256_m31_cP256_B[] = { 0x27D2604B, 0x2F38F0F8, 0x053B0F63, 0x0741AC33, 0x1886BC65, 0x2EF555DA, 0x293E7B3E, 0x0D762A8E, 0x00005AC6 }; /* * Addition in the field. Source operands shall fit on 257 bits; output * will be lower than twice the modulus. */ static void add_f256(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t w, cc; int i; cc = 0; for (i = 0; i < 9; i ++) { w = a[i] + b[i] + cc; d[i] = w & 0x3FFFFFFF; cc = w >> 30; } w >>= 16; d[8] &= 0xFFFF; d[3] -= w << 6; d[6] -= w << 12; d[7] += w << 14; cc = w; for (i = 0; i < 9; i ++) { w = d[i] + cc; d[i] = w & 0x3FFFFFFF; cc = ARSH(w, 30); } } /* * Subtraction in the field. Source operands shall be smaller than twice * the modulus; the result will fulfil the same property. */ static void sub_f256(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t w, cc; int i; /* * We really compute a - b + 2*p to make sure that the result is * positive. */ w = a[0] - b[0] - 0x00002; d[0] = w & 0x3FFFFFFF; w = a[1] - b[1] + ARSH(w, 30); d[1] = w & 0x3FFFFFFF; w = a[2] - b[2] + ARSH(w, 30); d[2] = w & 0x3FFFFFFF; w = a[3] - b[3] + ARSH(w, 30) + 0x00080; d[3] = w & 0x3FFFFFFF; w = a[4] - b[4] + ARSH(w, 30); d[4] = w & 0x3FFFFFFF; w = a[5] - b[5] + ARSH(w, 30); d[5] = w & 0x3FFFFFFF; w = a[6] - b[6] + ARSH(w, 30) + 0x02000; d[6] = w & 0x3FFFFFFF; w = a[7] - b[7] + ARSH(w, 30) - 0x08000; d[7] = w & 0x3FFFFFFF; w = a[8] - b[8] + ARSH(w, 30) + 0x20000; d[8] = w & 0xFFFF; w >>= 16; d[8] &= 0xFFFF; d[3] -= w << 6; d[6] -= w << 12; d[7] += w << 14; cc = w; for (i = 0; i < 9; i ++) { w = d[i] + cc; d[i] = w & 0x3FFFFFFF; cc = ARSH(w, 30); } } /* * Compute a multiplication in _src_ec_ec_p256_m31_cF256. Source operands shall be less than * twice the modulus. */ static void _src_ec_ec_p256_m31_cmul_f256(uint32_t *d, const uint32_t *a, const uint32_t *b) { uint32_t t[18]; uint64_t s[18]; uint64_t cc, x; uint32_t z, c; int i; _src_ec_ec_p256_m31_cmul9(t, a, b); /* * Modular reduction: each high word in added/subtracted where * necessary. * * The modulus is: * p = 2^256 - 2^224 + 2^192 + 2^96 - 1 * Therefore: * 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p * * For a word x at bit offset n (n >= 256), we have: * x*2^n = x*2^(n-32) - x*2^(n-64) * - x*2^(n - 160) + x*2^(n-256) mod p * * Thus, we can nullify the high word if we reinject it at some * proper emplacements. * * We use 64-bit intermediate words to allow for carries to * accumulate easily, before performing the final propagation. */ for (i = 0; i < 18; i ++) { s[i] = t[i]; } for (i = 17; i >= 9; i --) { uint64_t y; y = s[i]; s[i - 1] += ARSHW(y, 2); s[i - 2] += (y << 28) & 0x3FFFFFFF; s[i - 2] -= ARSHW(y, 4); s[i - 3] -= (y << 26) & 0x3FFFFFFF; s[i - 5] -= ARSHW(y, 10); s[i - 6] -= (y << 20) & 0x3FFFFFFF; s[i - 8] += ARSHW(y, 16); s[i - 9] += (y << 14) & 0x3FFFFFFF; } /* * Carry propagation must be signed. Moreover, we may have overdone * it a bit, and obtain a negative result. * * The loop above ran 9 times; each time, each word was augmented * by at most one extra word (in absolute value). Thus, the top * word must in fine fit in 39 bits, so the carry below will fit * on 9 bits. */ cc = 0; for (i = 0; i < 9; i ++) { x = s[i] + cc; d[i] = (uint32_t)x & 0x3FFFFFFF; cc = ARSHW(x, 30); } /* * All nine words fit on 30 bits, but there may be an extra * carry for a few bits (at most 9), and that carry may be * negative. Moreover, we want the result to fit on 257 bits. * The two lines below ensure that the word in d[] has length * 256 bits, and the (signed) carry (beyond 2^256) is in cc. The * significant length of cc is less than 24 bits, so we will be * able to switch to 32-bit operations. */ cc = ARSHW(x, 16); d[8] &= 0xFFFF; /* * One extra round of reduction, for cc*2^256, which means * adding cc*(2^224-2^192-2^96+1) to a 256-bit (nonnegative) * value. If cc is negative, then it may happen (rarely, but * not neglectibly so) that the result would be negative. In * order to avoid that, if cc is negative, then we add the * modulus once. Note that if cc is negative, then propagating * that carry must yield a value lower than the modulus, so * adding the modulus once will keep the final result under * twice the modulus. */ z = (uint32_t)cc; d[3] -= z << 6; d[6] -= (z << 12) & 0x3FFFFFFF; d[7] -= ARSH(z, 18); d[7] += (z << 14) & 0x3FFFFFFF; d[8] += ARSH(z, 16); c = z >> 31; d[0] -= c; d[3] += c << 6; d[6] += c << 12; d[7] -= c << 14; d[8] += c << 16; for (i = 0; i < 9; i ++) { uint32_t w; w = d[i] + z; d[i] = w & 0x3FFFFFFF; z = ARSH(w, 30); } } /* * Compute a square in _src_ec_ec_p256_m31_cF256. Source operand shall be less than * twice the modulus. */ static void _src_ec_ec_p256_m31_csquare_f256(uint32_t *d, const uint32_t *a) { uint32_t t[18]; uint64_t s[18]; uint64_t cc, x; uint32_t z, c; int i; _src_ec_ec_p256_m31_csquare9(t, a); /* * Modular reduction: each high word in added/subtracted where * necessary. * * The modulus is: * p = 2^256 - 2^224 + 2^192 + 2^96 - 1 * Therefore: * 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p * * For a word x at bit offset n (n >= 256), we have: * x*2^n = x*2^(n-32) - x*2^(n-64) * - x*2^(n - 160) + x*2^(n-256) mod p * * Thus, we can nullify the high word if we reinject it at some * proper emplacements. * * We use 64-bit intermediate words to allow for carries to * accumulate easily, before performing the final propagation. */ for (i = 0; i < 18; i ++) { s[i] = t[i]; } for (i = 17; i >= 9; i --) { uint64_t y; y = s[i]; s[i - 1] += ARSHW(y, 2); s[i - 2] += (y << 28) & 0x3FFFFFFF; s[i - 2] -= ARSHW(y, 4); s[i - 3] -= (y << 26) & 0x3FFFFFFF; s[i - 5] -= ARSHW(y, 10); s[i - 6] -= (y << 20) & 0x3FFFFFFF; s[i - 8] += ARSHW(y, 16); s[i - 9] += (y << 14) & 0x3FFFFFFF; } /* * Carry propagation must be signed. Moreover, we may have overdone * it a bit, and obtain a negative result. * * The loop above ran 9 times; each time, each word was augmented * by at most one extra word (in absolute value). Thus, the top * word must in fine fit in 39 bits, so the carry below will fit * on 9 bits. */ cc = 0; for (i = 0; i < 9; i ++) { x = s[i] + cc; d[i] = (uint32_t)x & 0x3FFFFFFF; cc = ARSHW(x, 30); } /* * All nine words fit on 30 bits, but there may be an extra * carry for a few bits (at most 9), and that carry may be * negative. Moreover, we want the result to fit on 257 bits. * The two lines below ensure that the word in d[] has length * 256 bits, and the (signed) carry (beyond 2^256) is in cc. The * significant length of cc is less than 24 bits, so we will be * able to switch to 32-bit operations. */ cc = ARSHW(x, 16); d[8] &= 0xFFFF; /* * One extra round of reduction, for cc*2^256, which means * adding cc*(2^224-2^192-2^96+1) to a 256-bit (nonnegative) * value. If cc is negative, then it may happen (rarely, but * not neglectibly so) that the result would be negative. In * order to avoid that, if cc is negative, then we add the * modulus once. Note that if cc is negative, then propagating * that carry must yield a value lower than the modulus, so * adding the modulus once will keep the final result under * twice the modulus. */ z = (uint32_t)cc; d[3] -= z << 6; d[6] -= (z << 12) & 0x3FFFFFFF; d[7] -= ARSH(z, 18); d[7] += (z << 14) & 0x3FFFFFFF; d[8] += ARSH(z, 16); c = z >> 31; d[0] -= c; d[3] += c << 6; d[6] += c << 12; d[7] -= c << 14; d[8] += c << 16; for (i = 0; i < 9; i ++) { uint32_t w; w = d[i] + z; d[i] = w & 0x3FFFFFFF; z = ARSH(w, 30); } } /* * Perform a "final reduction" in field _src_ec_ec_p256_m31_cF256 (field for curve P-256). * The source value must be less than twice the modulus. If the value * is not lower than the modulus, then the modulus is subtracted and * this function returns 1; otherwise, it leaves it untouched and it * returns 0. */ static uint32_t _src_ec_ec_p256_m31_creduce_final_f256(uint32_t *d) { uint32_t t[9]; uint32_t cc; int i; cc = 0; for (i = 0; i < 9; i ++) { uint32_t w; w = d[i] - _src_ec_ec_p256_m31_cF256[i] - cc; cc = w >> 31; t[i] = w & 0x3FFFFFFF; } cc ^= 1; CCOPY(cc, d, t, sizeof t); return cc; } /* * Jacobian coordinates for a point in P-256: affine coordinates (X,Y) * are such that: * X = x / z^2 * Y = y / z^3 * For the point at infinity, z = 0. * Each point thus admits many possible representations. * * Coordinates are represented in arrays of 32-bit integers, each holding * 30 bits of data. Values may also be slightly greater than the modulus, * but they will always be lower than twice the modulus. */ typedef struct { uint32_t x[9]; uint32_t y[9]; uint32_t z[9]; } p256__src_ec_ec_p256_m31_cjacobian; /* * Convert a point to affine coordinates: * - If the point is the point at infinity, then all three coordinates * are set to 0. * - Otherwise, the 'z' coordinate is set to 1, and the 'x' and 'y' * coordinates are the 'X' and 'Y' affine coordinates. * The coordinates are guaranteed to be lower than the modulus. */ static void _src_ec_ec_p256_m31_cp256_to_affine(p256__src_ec_ec_p256_m31_cjacobian *P) { uint32_t t1[9], t2[9]; int i; /* * Invert z with a modular exponentiation: the modulus is * p = 2^256 - 2^224 + 2^192 + 2^96 - 1, and the exponent is * p-2. Exponent bit pattern (from high to low) is: * - 32 bits of value 1 * - 31 bits of value 0 * - 1 bit of value 1 * - 96 bits of value 0 * - 94 bits of value 1 * - 1 bit of value 0 * - 1 bit of value 1 * Thus, we precompute z^(2^31-1) to speed things up. * * If z = 0 (point at infinity) then the modular exponentiation * will yield 0, which leads to the expected result (all three * coordinates set to 0). */ /* * A simple square-and-multiply for z^(2^31-1). We could save about * two dozen multiplications here with an addition chain, but * this would require a bit more code, and extra stack buffers. */ memcpy(t1, P->z, sizeof P->z); for (i = 0; i < 30; i ++) { _src_ec_ec_p256_m31_csquare_f256(t1, t1); _src_ec_ec_p256_m31_cmul_f256(t1, t1, P->z); } /* * Square-and-multiply. Apart from the squarings, we have a few * multiplications to set bits to 1; we multiply by the original z * for setting 1 bit, and by t1 for setting 31 bits. */ memcpy(t2, P->z, sizeof P->z); for (i = 1; i < 256; i ++) { _src_ec_ec_p256_m31_csquare_f256(t2, t2); switch (i) { case 31: case 190: case 221: case 252: _src_ec_ec_p256_m31_cmul_f256(t2, t2, t1); break; case 63: case 253: case 255: _src_ec_ec_p256_m31_cmul_f256(t2, t2, P->z); break; } } /* * Now that we have 1/z, multiply x by 1/z^2 and y by 1/z^3. */ _src_ec_ec_p256_m31_cmul_f256(t1, t2, t2); _src_ec_ec_p256_m31_cmul_f256(P->x, t1, P->x); _src_ec_ec_p256_m31_cmul_f256(t1, t1, t2); _src_ec_ec_p256_m31_cmul_f256(P->y, t1, P->y); _src_ec_ec_p256_m31_creduce_final_f256(P->x); _src_ec_ec_p256_m31_creduce_final_f256(P->y); /* * Multiply z by 1/z. If z = 0, then this will yield 0, otherwise * this will set z to 1. */ _src_ec_ec_p256_m31_cmul_f256(P->z, P->z, t2); _src_ec_ec_p256_m31_creduce_final_f256(P->z); } /* * Double a point in P-256. This function works for all valid points, * including the point at infinity. */ static void _src_ec_ec_p256_m31_cp256_double(p256__src_ec_ec_p256_m31_cjacobian *Q) { /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * These formulas work for all points, including points of order 2 * and points at infinity: * - If y = 0 then z' = 0. But there is no such point in P-256 * anyway. * - If z = 0 then z' = 0. */ uint32_t t1[9], t2[9], t3[9], t4[9]; /* * Compute z^2 in t1. */ _src_ec_ec_p256_m31_csquare_f256(t1, Q->z); /* * Compute x-z^2 in t2 and x+z^2 in t1. */ add_f256(t2, Q->x, t1); sub_f256(t1, Q->x, t1); /* * Compute 3*(x+z^2)*(x-z^2) in t1. */ _src_ec_ec_p256_m31_cmul_f256(t3, t1, t2); add_f256(t1, t3, t3); add_f256(t1, t3, t1); /* * Compute 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_p256_m31_csquare_f256(t3, Q->y); add_f256(t3, t3, t3); _src_ec_ec_p256_m31_cmul_f256(t2, Q->x, t3); add_f256(t2, t2, t2); /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_p256_m31_csquare_f256(Q->x, t1); sub_f256(Q->x, Q->x, t2); sub_f256(Q->x, Q->x, t2); /* * Compute z' = 2*y*z. */ _src_ec_ec_p256_m31_cmul_f256(t4, Q->y, Q->z); add_f256(Q->z, t4, t4); /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ sub_f256(t2, t2, Q->x); _src_ec_ec_p256_m31_cmul_f256(Q->y, t1, t2); _src_ec_ec_p256_m31_csquare_f256(t4, t3); add_f256(t4, t4, t4); sub_f256(Q->y, Q->y, t4); } /* * Add point P2 to point P1. * * This function computes the wrong result in the following cases: * * - If P1 == 0 but P2 != 0 * - If P1 != 0 but P2 == 0 * - If P1 == P2 * * In all three cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate * - P1 == 0 and P2 == 0 * - The Y coordinate of one of the points is 0 and the other point is * the point at infinity. * * The third case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 and P2 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. */ static uint32_t _src_ec_ec_p256_m31_cp256_add(p256__src_ec_ec_p256_m31_cjacobian *P1, const p256__src_ec_ec_p256_m31_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 */ uint32_t t1[9], t2[9], t3[9], t4[9], t5[9], t6[9], t7[9]; uint32_t ret; int i; /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_p256_m31_csquare_f256(t3, P2->z); _src_ec_ec_p256_m31_cmul_f256(t1, P1->x, t3); _src_ec_ec_p256_m31_cmul_f256(t4, P2->z, t3); _src_ec_ec_p256_m31_cmul_f256(t3, P1->y, t4); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m31_csquare_f256(t4, P1->z); _src_ec_ec_p256_m31_cmul_f256(t2, P2->x, t4); _src_ec_ec_p256_m31_cmul_f256(t5, P1->z, t4); _src_ec_ec_p256_m31_cmul_f256(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ sub_f256(t2, t2, t1); sub_f256(t4, t4, t3); _src_ec_ec_p256_m31_creduce_final_f256(t4); ret = 0; for (i = 0; i < 9; i ++) { ret |= t4[i]; } ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m31_csquare_f256(t7, t2); _src_ec_ec_p256_m31_cmul_f256(t6, t1, t7); _src_ec_ec_p256_m31_cmul_f256(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m31_csquare_f256(P1->x, t4); sub_f256(P1->x, P1->x, t5); sub_f256(P1->x, P1->x, t6); sub_f256(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ sub_f256(t6, t6, P1->x); _src_ec_ec_p256_m31_cmul_f256(P1->y, t4, t6); _src_ec_ec_p256_m31_cmul_f256(t1, t5, t3); sub_f256(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m31_cmul_f256(t1, P1->z, P2->z); _src_ec_ec_p256_m31_cmul_f256(P1->z, t1, t2); return ret; } /* * Add point P2 to point P1. This is a specialised function for the * case when P2 is a non-zero point in affine coordinate. * * This function computes the wrong result in the following cases: * * - If P1 == 0 * - If P1 == P2 * * In both cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate * - The Y coordinate of P2 is 0 and P1 is the point at infinity. * * The second case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. */ static uint32_t _src_ec_ec_p256_m31_c_src_ec_ec_p256_m31_cp256_add_mixed(p256__src_ec_ec_p256_m31_cjacobian *P1, const p256__src_ec_ec_p256_m31_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 */ uint32_t t1[9], t2[9], t3[9], t4[9], t5[9], t6[9], t7[9]; uint32_t ret; int i; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m31_csquare_f256(t4, P1->z); _src_ec_ec_p256_m31_cmul_f256(t2, P2->x, t4); _src_ec_ec_p256_m31_cmul_f256(t5, P1->z, t4); _src_ec_ec_p256_m31_cmul_f256(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ sub_f256(t2, t2, t1); sub_f256(t4, t4, t3); _src_ec_ec_p256_m31_creduce_final_f256(t4); ret = 0; for (i = 0; i < 9; i ++) { ret |= t4[i]; } ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m31_csquare_f256(t7, t2); _src_ec_ec_p256_m31_cmul_f256(t6, t1, t7); _src_ec_ec_p256_m31_cmul_f256(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m31_csquare_f256(P1->x, t4); sub_f256(P1->x, P1->x, t5); sub_f256(P1->x, P1->x, t6); sub_f256(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ sub_f256(t6, t6, P1->x); _src_ec_ec_p256_m31_cmul_f256(P1->y, t4, t6); _src_ec_ec_p256_m31_cmul_f256(t1, t5, t3); sub_f256(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m31_cmul_f256(P1->z, P1->z, t2); return ret; } /* * Decode a P-256 point. This function does not support the point at * infinity. Returned value is 0 if the point is invalid, 1 otherwise. */ static uint32_t _src_ec_ec_p256_m31_cp256_decode(p256__src_ec_ec_p256_m31_cjacobian *P, const void *src, size_t len) { const unsigned char *buf; uint32_t tx[9], ty[9], t1[9], t2[9]; uint32_t bad; int i; if (len != 65) { return 0; } buf = (const unsigned char*)src; /* * First byte must be 0x04 (uncompressed format). We could support * "hybrid format" (first byte is 0x06 or 0x07, and encodes the * least significant bit of the Y coordinate), but it is explicitly * forbidden by RFC 5480 (section 2.2). */ bad = NEQ(buf[0], 0x04); /* * Decode the coordinates, and check that they are both lower * than the modulus. */ tx[8] = be8_to_le30(tx, buf + 1, 32); ty[8] = be8_to_le30(ty, buf + 33, 32); bad |= _src_ec_ec_p256_m31_creduce_final_f256(tx); bad |= _src_ec_ec_p256_m31_creduce_final_f256(ty); /* * Check curve equation. */ _src_ec_ec_p256_m31_csquare_f256(t1, tx); _src_ec_ec_p256_m31_cmul_f256(t1, tx, t1); _src_ec_ec_p256_m31_csquare_f256(t2, ty); sub_f256(t1, t1, tx); sub_f256(t1, t1, tx); sub_f256(t1, t1, tx); add_f256(t1, t1, _src_ec_ec_p256_m31_cP256_B); sub_f256(t1, t1, t2); _src_ec_ec_p256_m31_creduce_final_f256(t1); for (i = 0; i < 9; i ++) { bad |= t1[i]; } /* * Copy coordinates to the point structure. */ memcpy(P->x, tx, sizeof tx); memcpy(P->y, ty, sizeof ty); memset(P->z, 0, sizeof P->z); P->z[0] = 1; return EQ(bad, 0); } /* * Encode a point into a buffer. This function assumes that the point is * valid, in affine coordinates, and not the point at infinity. */ static void _src_ec_ec_p256_m31_cp256_encode(void *dst, const p256__src_ec_ec_p256_m31_cjacobian *P) { unsigned char *buf; buf = (unsigned char*)dst; buf[0] = 0x04; le30_to_be8(buf + 1, 32, P->x); le30_to_be8(buf + 33, 32, P->y); } /* * Multiply a curve point by an integer. The integer is assumed to be * lower than the curve order, and the base point must not be the point * at infinity. */ static void _src_ec_ec_p256_m31_cp256_mul(p256__src_ec_ec_p256_m31_cjacobian *P, const unsigned char *x, size_t xlen) { /* * qz is a flag that is initially 1, and remains equal to 1 * as long as the point is the point at infinity. * * We use a 2-bit window to handle multiplier bits by pairs. * The precomputed window really is the points P2 and P3. */ uint32_t qz; p256__src_ec_ec_p256_m31_cjacobian P2, P3, Q, T, U; /* * Compute window values. */ P2 = *P; _src_ec_ec_p256_m31_cp256_double(&P2); P3 = *P; _src_ec_ec_p256_m31_cp256_add(&P3, &P2); /* * We start with Q = 0. We process multiplier bits 2 by 2. */ memset(&Q, 0, sizeof Q); qz = 1; while (xlen -- > 0) { int k; for (k = 6; k >= 0; k -= 2) { uint32_t bits; uint32_t bnz; _src_ec_ec_p256_m31_cp256_double(&Q); _src_ec_ec_p256_m31_cp256_double(&Q); T = *P; U = Q; bits = (*x >> k) & (uint32_t)3; bnz = NEQ(bits, 0); CCOPY(EQ(bits, 2), &T, &P2, sizeof T); CCOPY(EQ(bits, 3), &T, &P3, sizeof T); _src_ec_ec_p256_m31_cp256_add(&U, &T); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; } x ++; } *P = Q; } /* * Precomputed window: k*G points, where G is the curve generator, and k * is an integer from 1 to 15 (inclusive). The X and Y coordinates of * the point are encoded as 9 words of 30 bits each (little-endian * order). */ static const uint32_t _src_ec_ec_p256_m31_cGwin[15][18] = { { 0x1898C296, 0x1284E517, 0x1EB33A0F, 0x00DF604B, 0x2440F277, 0x339B958E, 0x04247F8B, 0x347CB84B, 0x00006B17, 0x37BF51F5, 0x2ED901A0, 0x3315ECEC, 0x338CD5DA, 0x0F9E162B, 0x1FAD29F0, 0x27F9B8EE, 0x10B8BF86, 0x00004FE3 }, { 0x07669978, 0x182D23F1, 0x3F21B35A, 0x225A789D, 0x351AC3C0, 0x08E00C12, 0x34F7E8A5, 0x1EC62340, 0x00007CF2, 0x227873D1, 0x3812DE74, 0x0E982299, 0x1F6B798F, 0x3430DBBA, 0x366B1A7D, 0x2D040293, 0x154436E3, 0x00000777 }, { 0x06E7FD6C, 0x2D05986F, 0x3ADA985F, 0x31ADC87B, 0x0BF165E6, 0x1FBE5475, 0x30A44C8F, 0x3934698C, 0x00005ECB, 0x227D5032, 0x29E6C49E, 0x04FB83D9, 0x0AAC0D8E, 0x24A2ECD8, 0x2C1B3869, 0x0FF7E374, 0x19031266, 0x00008734 }, { 0x2B030852, 0x024C0911, 0x05596EF5, 0x07F8B6DE, 0x262BD003, 0x3779967B, 0x08FBBA02, 0x128D4CB4, 0x0000E253, 0x184ED8C6, 0x310B08FC, 0x30EE0055, 0x3F25B0FC, 0x062D764E, 0x3FB97F6A, 0x33CC719D, 0x15D69318, 0x0000E0F1 }, { 0x03D033ED, 0x05552837, 0x35BE5242, 0x2320BF47, 0x268FDFEF, 0x13215821, 0x140D2D78, 0x02DE9454, 0x00005159, 0x3DA16DA4, 0x0742ED13, 0x0D80888D, 0x004BC035, 0x0A79260D, 0x06FCDAFE, 0x2727D8AE, 0x1F6A2412, 0x0000E0C1 }, { 0x3C2291A9, 0x1AC2ABA4, 0x3B215B4C, 0x131D037A, 0x17DDE302, 0x0C90B2E2, 0x0602C92D, 0x05CA9DA9, 0x0000B01A, 0x0FC77FE2, 0x35F1214E, 0x07E16BDF, 0x003DDC07, 0x2703791C, 0x3038B7EE, 0x3DAD56FE, 0x041D0C8D, 0x0000E85C }, { 0x3187B2A3, 0x0018A1C0, 0x00FEF5B3, 0x3E7E2E2A, 0x01FB607E, 0x2CC199F0, 0x37B4625B, 0x0EDBE82F, 0x00008E53, 0x01F400B4, 0x15786A1B, 0x3041B21C, 0x31CD8CF2, 0x35900053, 0x1A7E0E9B, 0x318366D0, 0x076F780C, 0x000073EB }, { 0x1B6FB393, 0x13767707, 0x3CE97DBB, 0x348E2603, 0x354CADC1, 0x09D0B4EA, 0x1B053404, 0x1DE76FBA, 0x000062D9, 0x0F09957E, 0x295029A8, 0x3E76A78D, 0x3B547DAE, 0x27CEE0A2, 0x0575DC45, 0x1D8244FF, 0x332F647A, 0x0000AD5A }, { 0x10949EE0, 0x1E7A292E, 0x06DF8B3D, 0x02B2E30B, 0x31F8729E, 0x24E35475, 0x30B71878, 0x35EDBFB7, 0x0000EA68, 0x0DD048FA, 0x21688929, 0x0DE823FE, 0x1C53FAA9, 0x0EA0C84D, 0x052A592A, 0x1FCE7870, 0x11325CB2, 0x00002A27 }, { 0x04C5723F, 0x30D81A50, 0x048306E4, 0x329B11C7, 0x223FB545, 0x085347A8, 0x2993E591, 0x1B5ACA8E, 0x0000CEF6, 0x04AF0773, 0x28D2EEA9, 0x2751EEEC, 0x037B4A7F, 0x3B4C1059, 0x08F37674, 0x2AE906E1, 0x18A88A6A, 0x00008786 }, { 0x34BC21D1, 0x0CCE474D, 0x15048BF4, 0x1D0BB409, 0x021CDA16, 0x20DE76C3, 0x34C59063, 0x04EDE20E, 0x00003ED1, 0x282A3740, 0x0BE3BBF3, 0x29889DAE, 0x03413697, 0x34C68A09, 0x210EBE93, 0x0C8A224C, 0x0826B331, 0x00009099 }, { 0x0624E3C4, 0x140317BA, 0x2F82C99D, 0x260C0A2C, 0x25D55179, 0x194DCC83, 0x3D95E462, 0x356F6A05, 0x0000741D, 0x0D4481D3, 0x2657FC8B, 0x1BA5CA71, 0x3AE44B0D, 0x07B1548E, 0x0E0D5522, 0x05FDC567, 0x2D1AA70E, 0x00000770 }, { 0x06072C01, 0x23857675, 0x1EAD58A9, 0x0B8A12D9, 0x1EE2FC79, 0x0177CB61, 0x0495A618, 0x20DEB82B, 0x0000177C, 0x2FC7BFD8, 0x310EEF8B, 0x1FB4DF39, 0x3B8530E8, 0x0F4E7226, 0x0246B6D0, 0x2A558A24, 0x163353AF, 0x000063BB }, { 0x24D2920B, 0x1C249DCC, 0x2069C5E5, 0x09AB2F9E, 0x36DF3CF1, 0x1991FD0C, 0x062B97A7, 0x1E80070E, 0x000054E7, 0x20D0B375, 0x2E9F20BD, 0x35090081, 0x1C7A9DDC, 0x22E7C371, 0x087E3016, 0x03175421, 0x3C6ECA7D, 0x0000F599 }, { 0x259B9D5F, 0x0D9A318F, 0x23A0EF16, 0x00EBE4B7, 0x088265AE, 0x2CDE2666, 0x2BAE7ADF, 0x1371A5C6, 0x0000F045, 0x0D034F36, 0x1F967378, 0x1B5FA3F4, 0x0EC8739D, 0x1643E62A, 0x1653947E, 0x22D1F4E6, 0x0FB8D64B, 0x0000B5B9 } }; /* * Lookup one of the _src_ec_ec_p256_m31_cGwin[] values, by index. This is constant-time. */ static void _src_ec_ec_p256_m31_clookup__src_ec_ec_p256_m31_cGwin(p256__src_ec_ec_p256_m31_cjacobian *T, uint32_t idx) { uint32_t xy[18]; uint32_t k; size_t u; memset(xy, 0, sizeof xy); for (k = 0; k < 15; k ++) { uint32_t m; m = -EQ(idx, k + 1); for (u = 0; u < 18; u ++) { xy[u] |= m & _src_ec_ec_p256_m31_cGwin[k][u]; } } memcpy(T->x, &xy[0], sizeof T->x); memcpy(T->y, &xy[9], sizeof T->y); memset(T->z, 0, sizeof T->z); T->z[0] = 1; } /* * Multiply the generator by an integer. The integer is assumed non-zero * and lower than the curve order. */ static void _src_ec_ec_p256_m31_c_src_ec_ec_p256_m31_cp256_mulgen(p256__src_ec_ec_p256_m31_cjacobian *P, const unsigned char *x, size_t xlen) { /* * qz is a flag that is initially 1, and remains equal to 1 * as long as the point is the point at infinity. * * We use a 4-bit window to handle multiplier bits by groups * of 4. The precomputed window is constant static data, with * points in affine coordinates; we use a constant-time lookup. */ p256__src_ec_ec_p256_m31_cjacobian Q; uint32_t qz; memset(&Q, 0, sizeof Q); qz = 1; while (xlen -- > 0) { int k; unsigned bx; bx = *x ++; for (k = 0; k < 2; k ++) { uint32_t bits; uint32_t bnz; p256__src_ec_ec_p256_m31_cjacobian T, U; _src_ec_ec_p256_m31_cp256_double(&Q); _src_ec_ec_p256_m31_cp256_double(&Q); _src_ec_ec_p256_m31_cp256_double(&Q); _src_ec_ec_p256_m31_cp256_double(&Q); bits = (bx >> 4) & 0x0F; bnz = NEQ(bits, 0); _src_ec_ec_p256_m31_clookup__src_ec_ec_p256_m31_cGwin(&T, bits); U = Q; _src_ec_ec_p256_m31_c_src_ec_ec_p256_m31_cp256_add_mixed(&U, &T); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; bx <<= 4; } } *P = Q; } static const unsigned char _src_ec_ec_p256_m31_cP256_G[] = { 0x04, 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, 0x4F, 0xE3, 0x42, 0xE2, 0xFE, 0x1A, 0x7F, 0x9B, 0x8E, 0xE7, 0xEB, 0x4A, 0x7C, 0x0F, 0x9E, 0x16, 0x2B, 0xCE, 0x33, 0x57, 0x6B, 0x31, 0x5E, 0xCE, 0xCB, 0xB6, 0x40, 0x68, 0x37, 0xBF, 0x51, 0xF5 }; static const unsigned char _src_ec_ec_p256_m31_cP256_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51 }; static const unsigned char * _src_ec_ec_p256_m31_capi_generator(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m31_cP256_G; return _src_ec_ec_p256_m31_cP256_G; } static const unsigned char * _src_ec_ec_p256_m31_capi_order(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m31_cP256_N; return _src_ec_ec_p256_m31_cP256_N; } static size_t _src_ec_ec_p256_m31_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 1; } static uint32_t _src_ec_ec_p256_m31_capi_mul(unsigned char *G, size_t Glen, const unsigned char *x, size_t xlen, int curve) { uint32_t r; p256__src_ec_ec_p256_m31_cjacobian P; (void)curve; if (Glen != 65) { return 0; } r = _src_ec_ec_p256_m31_cp256_decode(&P, G, Glen); _src_ec_ec_p256_m31_cp256_mul(&P, x, xlen); _src_ec_ec_p256_m31_cp256_to_affine(&P); _src_ec_ec_p256_m31_cp256_encode(G, &P); return r; } static size_t _src_ec_ec_p256_m31_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { p256__src_ec_ec_p256_m31_cjacobian P; (void)curve; _src_ec_ec_p256_m31_c_src_ec_ec_p256_m31_cp256_mulgen(&P, x, xlen); _src_ec_ec_p256_m31_cp256_to_affine(&P); _src_ec_ec_p256_m31_cp256_encode(R, &P); return 65; } static uint32_t _src_ec_ec_p256_m31_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { p256__src_ec_ec_p256_m31_cjacobian P, Q; uint32_t r, t, z; int i; (void)curve; if (len != 65) { return 0; } r = _src_ec_ec_p256_m31_cp256_decode(&P, A, len); _src_ec_ec_p256_m31_cp256_mul(&P, x, xlen); if (B == NULL) { _src_ec_ec_p256_m31_c_src_ec_ec_p256_m31_cp256_mulgen(&Q, y, ylen); } else { r &= _src_ec_ec_p256_m31_cp256_decode(&Q, B, len); _src_ec_ec_p256_m31_cp256_mul(&Q, y, ylen); } /* * The final addition may fail in case both points are equal. */ t = _src_ec_ec_p256_m31_cp256_add(&P, &Q); _src_ec_ec_p256_m31_creduce_final_f256(P.z); z = 0; for (i = 0; i < 9; i ++) { z |= P.z[i]; } z = EQ(z, 0); _src_ec_ec_p256_m31_cp256_double(&Q); /* * If z is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * z = 0, t = 0 return P (normal addition) * z = 0, t = 1 return P (normal addition) * z = 1, t = 0 return Q (a 'double' case) * z = 1, t = 1 report an error (P+Q = 0) */ CCOPY(z & ~t, &P, &Q, sizeof Q); _src_ec_ec_p256_m31_cp256_to_affine(&P); _src_ec_ec_p256_m31_cp256_encode(A, &P); r &= ~(z & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_p256_m31 = { (uint32_t)0x00800000, &_src_ec_ec_p256_m31_capi_generator, &_src_ec_ec_p256_m31_capi_order, &_src_ec_ec_p256_m31_capi_xoff, &_src_ec_ec_p256_m31_capi_mul, &_src_ec_ec_p256_m31_capi_mulgen, &_src_ec_ec_p256_m31_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_UMUL128 #include #endif static const unsigned char _src_ec_ec_p256_m62_cP256_G[] = { 0x04, 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, 0x4F, 0xE3, 0x42, 0xE2, 0xFE, 0x1A, 0x7F, 0x9B, 0x8E, 0xE7, 0xEB, 0x4A, 0x7C, 0x0F, 0x9E, 0x16, 0x2B, 0xCE, 0x33, 0x57, 0x6B, 0x31, 0x5E, 0xCE, 0xCB, 0xB6, 0x40, 0x68, 0x37, 0xBF, 0x51, 0xF5 }; static const unsigned char _src_ec_ec_p256_m62_cP256_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51 }; static const unsigned char * _src_ec_ec_p256_m62_capi_generator(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m62_cP256_G; return _src_ec_ec_p256_m62_cP256_G; } static const unsigned char * _src_ec_ec_p256_m62_capi_order(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m62_cP256_N; return _src_ec_ec_p256_m62_cP256_N; } static size_t _src_ec_ec_p256_m62_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 1; } /* * A field element is encoded as five 64-bit integers, in basis 2^52. * Limbs may occasionally exceed 2^52. * * A _partially reduced_ value is such that the following hold: * - top limb is less than 2^48 + 2^30 * - the other limbs fit on 53 bits each * In particular, such a value is less than twice the modulus p. */ #define BIT(n) ((uint64_t)1 << (n)) #define MASK48 (BIT(48) - BIT(0)) #define MASK52 (BIT(52) - BIT(0)) /* R = 2^260 mod p */ static const uint64_t _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R[] = { 0x0000000000010, 0xF000000000000, 0xFFFFFFFFFFFFF, 0xFFEFFFFFFFFFF, 0x00000000FFFFF }; /* Curve equation is y^2 = x^3 - 3*x + B. This constant is B*R mod p (Montgomery representation of B). */ static const uint64_t _src_ec_ec_p256_m62_cP256_B_MONTY[] = { 0xDF6229C4BDDFD, 0xCA8843090D89C, 0x212ED6ACF005C, 0x83415A220ABF7, 0x0C30061DD4874 }; /* * Addition in the field. Carry propagation is not performed. * On input, limbs may be up to 63 bits each; on output, they will * be up to one bit more than on input. */ static inline void _src_ec_ec_p256_m62_cf256_add(uint64_t *d, const uint64_t *a, const uint64_t *b) { d[0] = a[0] + b[0]; d[1] = a[1] + b[1]; d[2] = a[2] + b[2]; d[3] = a[3] + b[3]; d[4] = a[4] + b[4]; } /* * Partially reduce the provided value. * Input: limbs can go up to 61 bits each. * Output: partially reduced. */ static inline void f256_partial_reduce(uint64_t *a) { uint64_t w, cc, s; /* * Propagate carries. */ w = a[0]; a[0] = w & MASK52; cc = w >> 52; w = a[1] + cc; a[1] = w & MASK52; cc = w >> 52; w = a[2] + cc; a[2] = w & MASK52; cc = w >> 52; w = a[3] + cc; a[3] = w & MASK52; cc = w >> 52; a[4] += cc; s = a[4] >> 48; /* s < 2^14 */ a[0] += s; /* a[0] < 2^52 + 2^14 */ w = a[1] - (s << 44); a[1] = w & MASK52; /* a[1] < 2^52 */ cc = -(w >> 52) & 0xFFF; /* cc < 16 */ w = a[2] - cc; a[2] = w & MASK52; /* a[2] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = a[3] - cc - (s << 36); a[3] = w & MASK52; /* a[3] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = a[4] & MASK48; a[4] = w + (s << 16) - cc; /* a[4] < 2^48 + 2^30 */ } /* * Subtraction in the field. * Input: limbs must fit on 60 bits each; in particular, the complete * integer will be less than 2^268 + 2^217. * Output: partially reduced. */ static inline void _src_ec_ec_p256_m62_cf256_sub(uint64_t *d, const uint64_t *a, const uint64_t *b) { uint64_t t[5], w, s, cc; /* * We compute d = 2^13*p + a - b; this ensures a positive * intermediate value. * * Each individual addition/subtraction may yield a positive or * negative result; thus, we need to handle a signed carry, thus * with sign extension. We prefer not to use signed types (int64_t) * because conversion from unsigned to signed is cumbersome (a * direct cast with the top bit set is undefined behavior; instead, * we have to use pointer aliasing, using the guaranteed properties * of exact-width types, but this requires the compiler to optimize * away the writes and reads from RAM), and right-shifting a * signed negative value is implementation-defined. Therefore, * we use a custom sign extension. */ w = a[0] - b[0] - BIT(13); t[0] = w & MASK52; cc = w >> 52; cc |= -(cc & BIT(11)); w = a[1] - b[1] + cc; t[1] = w & MASK52; cc = w >> 52; cc |= -(cc & BIT(11)); w = a[2] - b[2] + cc; t[2] = (w & MASK52) + BIT(5); cc = w >> 52; cc |= -(cc & BIT(11)); w = a[3] - b[3] + cc; t[3] = (w & MASK52) + BIT(49); cc = w >> 52; cc |= -(cc & BIT(11)); t[4] = (BIT(61) - BIT(29)) + a[4] - b[4] + cc; /* * Perform partial reduction. Rule is: * 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p * * At that point: * 0 <= t[0] <= 2^52 - 1 * 0 <= t[1] <= 2^52 - 1 * 2^5 <= t[2] <= 2^52 + 2^5 - 1 * 2^49 <= t[3] <= 2^52 + 2^49 - 1 * 2^59 < t[4] <= 2^61 + 2^60 - 2^29 * * Thus, the value 's' (t[4] / 2^48) will be necessarily * greater than 2048, and less than 12288. */ s = t[4] >> 48; d[0] = t[0] + s; /* d[0] <= 2^52 + 12287 */ w = t[1] - (s << 44); d[1] = w & MASK52; /* d[1] <= 2^52 - 1 */ cc = -(w >> 52) & 0xFFF; /* cc <= 48 */ w = t[2] - cc; cc = w >> 63; /* cc = 0 or 1 */ d[2] = w + (cc << 52); /* d[2] <= 2^52 + 31 */ w = t[3] - cc - (s << 36); cc = w >> 63; /* cc = 0 or 1 */ d[3] = w + (cc << 52); /* t[3] <= 2^52 + 2^49 - 1 */ d[4] = (t[4] & MASK48) + (s << 16) - cc; /* d[4] < 2^48 + 2^30 */ /* * If s = 0, then none of the limbs is modified, and there cannot * be an overflow; if s != 0, then (s << 16) > cc, and there is * no overflow either. */ } /* * Montgomery multiplication in the field. * Input: limbs must fit on 56 bits each. * Output: partially reduced. */ static void _src_ec_ec_p256_m62_cf256_montymul(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 int i; uint64_t t[5]; t[0] = 0; t[1] = 0; t[2] = 0; t[3] = 0; t[4] = 0; for (i = 0; i < 5; i ++) { uint64_t x, f, cc, w, s; unsigned __int128 z; /* * Since limbs of a[] and b[] fit on 56 bits each, * each individual product fits on 112 bits. Also, * the factor f fits on 52 bits, so f<<48 fits on * 112 bits too. This guarantees that carries (cc) * will fit on 62 bits, thus no overflow. * * The operations below compute: * t <- (t + x*b + f*p) / 2^64 */ x = a[i]; z = (unsigned __int128)b[0] * (unsigned __int128)x + (unsigned __int128)t[0]; f = (uint64_t)z & MASK52; cc = (uint64_t)(z >> 52); z = (unsigned __int128)b[1] * (unsigned __int128)x + (unsigned __int128)t[1] + cc + ((unsigned __int128)f << 44); t[0] = (uint64_t)z & MASK52; cc = (uint64_t)(z >> 52); z = (unsigned __int128)b[2] * (unsigned __int128)x + (unsigned __int128)t[2] + cc; t[1] = (uint64_t)z & MASK52; cc = (uint64_t)(z >> 52); z = (unsigned __int128)b[3] * (unsigned __int128)x + (unsigned __int128)t[3] + cc + ((unsigned __int128)f << 36); t[2] = (uint64_t)z & MASK52; cc = (uint64_t)(z >> 52); z = (unsigned __int128)b[4] * (unsigned __int128)x + (unsigned __int128)t[4] + cc + ((unsigned __int128)f << 48) - ((unsigned __int128)f << 16); t[3] = (uint64_t)z & MASK52; t[4] = (uint64_t)(z >> 52); /* * t[4] may be up to 62 bits here; we need to do a * partial reduction. Note that limbs t[0] to t[3] * fit on 52 bits each. */ s = t[4] >> 48; /* s < 2^14 */ t[0] += s; /* t[0] < 2^52 + 2^14 */ w = t[1] - (s << 44); t[1] = w & MASK52; /* t[1] < 2^52 */ cc = -(w >> 52) & 0xFFF; /* cc < 16 */ w = t[2] - cc; t[2] = w & MASK52; /* t[2] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = t[3] - cc - (s << 36); t[3] = w & MASK52; /* t[3] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = t[4] & MASK48; t[4] = w + (s << 16) - cc; /* t[4] < 2^48 + 2^30 */ /* * The final t[4] cannot overflow because cc is 0 or 1, * and cc can be 1 only if s != 0. */ } d[0] = t[0]; d[1] = t[1]; d[2] = t[2]; d[3] = t[3]; d[4] = t[4]; #elif BR_UMUL128 int i; uint64_t t[5]; t[0] = 0; t[1] = 0; t[2] = 0; t[3] = 0; t[4] = 0; for (i = 0; i < 5; i ++) { uint64_t x, f, cc, w, s, zh, zl; unsigned char k; /* * Since limbs of a[] and b[] fit on 56 bits each, * each individual product fits on 112 bits. Also, * the factor f fits on 52 bits, so f<<48 fits on * 112 bits too. This guarantees that carries (cc) * will fit on 62 bits, thus no overflow. * * The operations below compute: * t <- (t + x*b + f*p) / 2^64 */ x = a[i]; zl = _umul128(b[0], x, &zh); k = _addcarry_u64(0, t[0], zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); f = zl & MASK52; cc = (zl >> 52) | (zh << 12); zl = _umul128(b[1], x, &zh); k = _addcarry_u64(0, t[1], zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, cc, zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, f << 44, zl, &zl); (void)_addcarry_u64(k, f >> 20, zh, &zh); t[0] = zl & MASK52; cc = (zl >> 52) | (zh << 12); zl = _umul128(b[2], x, &zh); k = _addcarry_u64(0, t[2], zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, cc, zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); t[1] = zl & MASK52; cc = (zl >> 52) | (zh << 12); zl = _umul128(b[3], x, &zh); k = _addcarry_u64(0, t[3], zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, cc, zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, f << 36, zl, &zl); (void)_addcarry_u64(k, f >> 28, zh, &zh); t[2] = zl & MASK52; cc = (zl >> 52) | (zh << 12); zl = _umul128(b[4], x, &zh); k = _addcarry_u64(0, t[4], zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, cc, zl, &zl); (void)_addcarry_u64(k, 0, zh, &zh); k = _addcarry_u64(0, f << 48, zl, &zl); (void)_addcarry_u64(k, f >> 16, zh, &zh); k = _subborrow_u64(0, zl, f << 16, &zl); (void)_subborrow_u64(k, zh, f >> 48, &zh); t[3] = zl & MASK52; t[4] = (zl >> 52) | (zh << 12); /* * t[4] may be up to 62 bits here; we need to do a * partial reduction. Note that limbs t[0] to t[3] * fit on 52 bits each. */ s = t[4] >> 48; /* s < 2^14 */ t[0] += s; /* t[0] < 2^52 + 2^14 */ w = t[1] - (s << 44); t[1] = w & MASK52; /* t[1] < 2^52 */ cc = -(w >> 52) & 0xFFF; /* cc < 16 */ w = t[2] - cc; t[2] = w & MASK52; /* t[2] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = t[3] - cc - (s << 36); t[3] = w & MASK52; /* t[3] < 2^52 */ cc = w >> 63; /* cc = 0 or 1 */ w = t[4] & MASK48; t[4] = w + (s << 16) - cc; /* t[4] < 2^48 + 2^30 */ /* * The final t[4] cannot overflow because cc is 0 or 1, * and cc can be 1 only if s != 0. */ } d[0] = t[0]; d[1] = t[1]; d[2] = t[2]; d[3] = t[3]; d[4] = t[4]; #endif } /* * Montgomery squaring in the field; currently a basic wrapper around * multiplication (inline, should be optimized away). * TODO: see if some extra speed can be gained here. */ static inline void _src_ec_ec_p256_m62_cf256_montysquare(uint64_t *d, const uint64_t *a) { _src_ec_ec_p256_m62_cf256_montymul(d, a, a); } /* * Convert to Montgomery representation. */ static void _src_ec_ec_p256_m62_cf256_tomonty(uint64_t *d, const uint64_t *a) { /* * R2 = 2^520 mod p. * If R = 2^260 mod p, then R2 = R^2 mod p; and the Montgomery * multiplication of a by R2 is: a*R2/R = a*R mod p, i.e. the * conversion to Montgomery representation. */ static const uint64_t R2[] = { 0x0000000000300, 0xFFFFFFFF00000, 0xFFFFEFFFFFFFB, 0xFDFFFFFFFFFFF, 0x0000004FFFFFF }; _src_ec_ec_p256_m62_cf256_montymul(d, a, R2); } /* * Convert from Montgomery representation. */ static void _src_ec_ec_p256_m62_cf256_frommonty(uint64_t *d, const uint64_t *a) { /* * Montgomery multiplication by 1 is division by 2^260 modulo p. */ static const uint64_t one[] = { 1, 0, 0, 0, 0 }; _src_ec_ec_p256_m62_cf256_montymul(d, a, one); } /* * Inversion in the field. If the source value is 0 modulo p, then this * returns 0 or p. This function uses Montgomery representation. */ static void _src_ec_ec_p256_m62_cf256_invert(uint64_t *d, const uint64_t *a) { /* * We compute a^(p-2) mod p. The exponent pattern (from high to * low) is: * - 32 bits of value 1 * - 31 bits of value 0 * - 1 bit of value 1 * - 96 bits of value 0 * - 94 bits of value 1 * - 1 bit of value 0 * - 1 bit of value 1 * To speed up the square-and-multiply algorithm, we precompute * a^(2^31-1). */ uint64_t r[5], t[5]; int i; memcpy(t, a, sizeof t); for (i = 0; i < 30; i ++) { _src_ec_ec_p256_m62_cf256_montysquare(t, t); _src_ec_ec_p256_m62_cf256_montymul(t, t, a); } memcpy(r, t, sizeof t); for (i = 224; i >= 0; i --) { _src_ec_ec_p256_m62_cf256_montysquare(r, r); switch (i) { case 0: case 2: case 192: case 224: _src_ec_ec_p256_m62_cf256_montymul(r, r, a); break; case 3: case 34: case 65: _src_ec_ec_p256_m62_cf256_montymul(r, r, t); break; } } memcpy(d, r, sizeof r); } /* * Finalize reduction. * Input value should be partially reduced. * On output, limbs a[0] to a[3] fit on 52 bits each, limb a[4] fits * on 48 bits, and the integer is less than p. */ static inline void _src_ec_ec_p256_m62_cf256_final_reduce(uint64_t *a) { uint64_t r[5], t[5], w, cc; int i; /* * Propagate carries to ensure that limbs 0 to 3 fit on 52 bits. */ cc = 0; for (i = 0; i < 5; i ++) { w = a[i] + cc; r[i] = w & MASK52; cc = w >> 52; } /* * We compute t = r + (2^256 - p) = r + 2^224 - 2^192 - 2^96 + 1. * If t < 2^256, then r < p, and we return r. Otherwise, we * want to return r - p = t - 2^256. */ /* * Add 2^224 + 1, and propagate carries to ensure that limbs * t[0] to t[3] fit in 52 bits each. */ w = r[0] + 1; t[0] = w & MASK52; cc = w >> 52; w = r[1] + cc; t[1] = w & MASK52; cc = w >> 52; w = r[2] + cc; t[2] = w & MASK52; cc = w >> 52; w = r[3] + cc; t[3] = w & MASK52; cc = w >> 52; t[4] = r[4] + cc + BIT(16); /* * Subtract 2^192 + 2^96. Since we just added 2^224 + 1, the * result cannot be negative. */ w = t[1] - BIT(44); t[1] = w & MASK52; cc = w >> 63; w = t[2] - cc; t[2] = w & MASK52; cc = w >> 63; w = t[3] - BIT(36) - cc; t[3] = w & MASK52; cc = w >> 63; t[4] -= cc; /* * If the top limb t[4] fits on 48 bits, then r[] is already * in the proper range. Otherwise, t[] is the value to return * (truncated to 256 bits). */ cc = -(t[4] >> 48); t[4] &= MASK48; for (i = 0; i < 5; i ++) { a[i] = r[i] ^ (cc & (r[i] ^ t[i])); } } /* * Points in affine and Jacobian coordinates. * * - In affine coordinates, the point-at-infinity cannot be encoded. * - Jacobian coordinates (X,Y,Z) correspond to affine (X/Z^2,Y/Z^3); * if Z = 0 then this is the point-at-infinity. */ typedef struct { uint64_t x[5]; uint64_t y[5]; } _src_ec_ec_p256_m62_cp256_affine; typedef struct { uint64_t x[5]; uint64_t y[5]; uint64_t z[5]; } p256__src_ec_ec_p256_m62_cjacobian; /* * Decode a field element (unsigned big endian notation). */ static void f256_decode(uint64_t *a, const unsigned char *buf) { uint64_t w0, w1, w2, w3; w3 = br_dec64be(buf + 0); w2 = br_dec64be(buf + 8); w1 = br_dec64be(buf + 16); w0 = br_dec64be(buf + 24); a[0] = w0 & MASK52; a[1] = ((w0 >> 52) | (w1 << 12)) & MASK52; a[2] = ((w1 >> 40) | (w2 << 24)) & MASK52; a[3] = ((w2 >> 28) | (w3 << 36)) & MASK52; a[4] = w3 >> 16; } /* * Encode a field element (unsigned big endian notation). The field * element MUST be fully reduced. */ static void f256_encode(unsigned char *buf, const uint64_t *a) { uint64_t w0, w1, w2, w3; w0 = a[0] | (a[1] << 52); w1 = (a[1] >> 12) | (a[2] << 40); w2 = (a[2] >> 24) | (a[3] << 28); w3 = (a[3] >> 36) | (a[4] << 16); br_enc64be(buf + 0, w3); br_enc64be(buf + 8, w2); br_enc64be(buf + 16, w1); br_enc64be(buf + 24, w0); } /* * Decode a point. The returned point is in Jacobian coordinates, but * with z = 1. If the encoding is invalid, or encodes a point which is * not on the curve, or encodes the point at infinity, then this function * returns 0. Otherwise, 1 is returned. * * The buffer is assumed to have length exactly 65 bytes. */ static uint32_t _src_ec_ec_p256_m62_cpoint_decode(p256__src_ec_ec_p256_m62_cjacobian *P, const unsigned char *buf) { uint64_t x[5], y[5], t[5], x3[5], tt; uint32_t r; /* * Header byte shall be 0x04. */ r = EQ(buf[0], 0x04); /* * Decode X and Y coordinates, and convert them into * Montgomery representation. */ f256_decode(x, buf + 1); f256_decode(y, buf + 33); _src_ec_ec_p256_m62_cf256_tomonty(x, x); _src_ec_ec_p256_m62_cf256_tomonty(y, y); /* * Verify y^2 = x^3 + A*x + B. In curve P-256, A = -3. * Note that the Montgomery representation of 0 is 0. We must * take care to apply the final reduction to make sure we have * 0 and not p. */ _src_ec_ec_p256_m62_cf256_montysquare(t, y); _src_ec_ec_p256_m62_cf256_montysquare(x3, x); _src_ec_ec_p256_m62_cf256_montymul(x3, x3, x); _src_ec_ec_p256_m62_cf256_sub(t, t, x3); _src_ec_ec_p256_m62_cf256_add(t, t, x); _src_ec_ec_p256_m62_cf256_add(t, t, x); _src_ec_ec_p256_m62_cf256_add(t, t, x); _src_ec_ec_p256_m62_cf256_sub(t, t, _src_ec_ec_p256_m62_cP256_B_MONTY); _src_ec_ec_p256_m62_cf256_final_reduce(t); tt = t[0] | t[1] | t[2] | t[3] | t[4]; r &= EQ((uint32_t)(tt | (tt >> 32)), 0); /* * Return the point in Jacobian coordinates (and Montgomery * representation). */ memcpy(P->x, x, sizeof x); memcpy(P->y, y, sizeof y); memcpy(P->z, _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R, sizeof _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R); return r; } /* * Final conversion for a point: * - The point is converted back to affine coordinates. * - Final reduction is performed. * - The point is encoded into the provided buffer. * * If the point is the point-at-infinity, all operations are performed, * but the buffer contents are indeterminate, and 0 is returned. Otherwise, * the encoded point is written in the buffer, and 1 is returned. */ static uint32_t _src_ec_ec_p256_m62_cpoint_encode(unsigned char *buf, const p256__src_ec_ec_p256_m62_cjacobian *P) { uint64_t t1[5], t2[5], z; /* Set t1 = 1/z^2 and t2 = 1/z^3. */ _src_ec_ec_p256_m62_cf256_invert(t2, P->z); _src_ec_ec_p256_m62_cf256_montysquare(t1, t2); _src_ec_ec_p256_m62_cf256_montymul(t2, t2, t1); /* Compute affine coordinates x (in t1) and y (in t2). */ _src_ec_ec_p256_m62_cf256_montymul(t1, P->x, t1); _src_ec_ec_p256_m62_cf256_montymul(t2, P->y, t2); /* Convert back from Montgomery representation, and finalize reductions. */ _src_ec_ec_p256_m62_cf256_frommonty(t1, t1); _src_ec_ec_p256_m62_cf256_frommonty(t2, t2); _src_ec_ec_p256_m62_cf256_final_reduce(t1); _src_ec_ec_p256_m62_cf256_final_reduce(t2); /* Encode. */ buf[0] = 0x04; f256_encode(buf + 1, t1); f256_encode(buf + 33, t2); /* Return success if and only if P->z != 0. */ z = P->z[0] | P->z[1] | P->z[2] | P->z[3] | P->z[4]; return NEQ((uint32_t)(z | z >> 32), 0); } /* * Point doubling in Jacobian coordinates: point P is doubled. * Note: if the source point is the point-at-infinity, then the result is * still the point-at-infinity, which is correct. Moreover, if the three * coordinates were zero, then they still are zero in the returned value. */ static void _src_ec_ec_p256_m62_cp256_double(p256__src_ec_ec_p256_m62_cjacobian *P) { /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * These formulas work for all points, including points of order 2 * and points at infinity: * - If y = 0 then z' = 0. But there is no such point in P-256 * anyway. * - If z = 0 then z' = 0. */ uint64_t t1[5], t2[5], t3[5], t4[5]; /* * Compute z^2 in t1. */ _src_ec_ec_p256_m62_cf256_montysquare(t1, P->z); /* * Compute x-z^2 in t2 and x+z^2 in t1. */ _src_ec_ec_p256_m62_cf256_add(t2, P->x, t1); _src_ec_ec_p256_m62_cf256_sub(t1, P->x, t1); /* * Compute 3*(x+z^2)*(x-z^2) in t1. */ _src_ec_ec_p256_m62_cf256_montymul(t3, t1, t2); _src_ec_ec_p256_m62_cf256_add(t1, t3, t3); _src_ec_ec_p256_m62_cf256_add(t1, t3, t1); /* * Compute 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_p256_m62_cf256_montysquare(t3, P->y); _src_ec_ec_p256_m62_cf256_add(t3, t3, t3); _src_ec_ec_p256_m62_cf256_montymul(t2, P->x, t3); _src_ec_ec_p256_m62_cf256_add(t2, t2, t2); /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_p256_m62_cf256_montysquare(P->x, t1); _src_ec_ec_p256_m62_cf256_sub(P->x, P->x, t2); _src_ec_ec_p256_m62_cf256_sub(P->x, P->x, t2); /* * Compute z' = 2*y*z. */ _src_ec_ec_p256_m62_cf256_montymul(t4, P->y, P->z); _src_ec_ec_p256_m62_cf256_add(P->z, t4, t4); f256_partial_reduce(P->z); /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ _src_ec_ec_p256_m62_cf256_sub(t2, t2, P->x); _src_ec_ec_p256_m62_cf256_montymul(P->y, t1, t2); _src_ec_ec_p256_m62_cf256_montysquare(t4, t3); _src_ec_ec_p256_m62_cf256_add(t4, t4, t4); _src_ec_ec_p256_m62_cf256_sub(P->y, P->y, t4); } /* * Point addition (Jacobian coordinates): P1 is replaced with P1+P2. * This function computes the wrong result in the following cases: * * - If P1 == 0 but P2 != 0 * - If P1 != 0 but P2 == 0 * - If P1 == P2 * * In all three cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate. * - P1 == 0 and P2 == 0. * - The Y coordinate of one of the points is 0 and the other point is * the point at infinity. * * The third case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 and P2 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. * * Note that you can get a returned value of 0 with a correct result, * e.g. if P1 and P2 have the same Y coordinate, but distinct X coordinates. */ static uint32_t _src_ec_ec_p256_m62_cp256_add(p256__src_ec_ec_p256_m62_cjacobian *P1, const p256__src_ec_ec_p256_m62_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 */ uint64_t t1[5], t2[5], t3[5], t4[5], t5[5], t6[5], t7[5], tt; uint32_t ret; /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_p256_m62_cf256_montysquare(t3, P2->z); _src_ec_ec_p256_m62_cf256_montymul(t1, P1->x, t3); _src_ec_ec_p256_m62_cf256_montymul(t4, P2->z, t3); _src_ec_ec_p256_m62_cf256_montymul(t3, P1->y, t4); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m62_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m62_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m62_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m62_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ _src_ec_ec_p256_m62_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m62_cf256_sub(t4, t4, t3); _src_ec_ec_p256_m62_cf256_final_reduce(t4); tt = t4[0] | t4[1] | t4[2] | t4[3] | t4[4]; ret = (uint32_t)(tt | (tt >> 32)); ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m62_cf256_montysquare(t7, t2); _src_ec_ec_p256_m62_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m62_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m62_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m62_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m62_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m62_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m62_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m62_cf256_montymul(t1, P1->z, P2->z); _src_ec_ec_p256_m62_cf256_montymul(P1->z, t1, t2); return ret; } /* * Point addition (mixed coordinates): P1 is replaced with P1+P2. * This is a specialised function for the case when P2 is a non-zero point * in affine coordinates. * * This function computes the wrong result in the following cases: * * - If P1 == 0 * - If P1 == P2 * * In both cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y (affine) coordinate. * - The Y coordinate of P2 is 0 and P1 is the point at infinity. * * The second case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. * * Again, a value of 0 may be returned in some cases where the addition * result is correct. */ static uint32_t _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cp256_add_mixed(p256__src_ec_ec_p256_m62_cjacobian *P1, const _src_ec_ec_p256_m62_cp256_affine *P2) { /* * Addtions formulas are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 */ uint64_t t1[5], t2[5], t3[5], t4[5], t5[5], t6[5], t7[5], tt; uint32_t ret; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m62_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m62_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m62_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m62_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ _src_ec_ec_p256_m62_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m62_cf256_sub(t4, t4, t3); _src_ec_ec_p256_m62_cf256_final_reduce(t4); tt = t4[0] | t4[1] | t4[2] | t4[3] | t4[4]; ret = (uint32_t)(tt | (tt >> 32)); ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m62_cf256_montysquare(t7, t2); _src_ec_ec_p256_m62_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m62_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m62_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m62_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m62_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m62_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m62_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m62_cf256_montymul(P1->z, P1->z, t2); return ret; } #if 0 /* unused */ /* * Point addition (mixed coordinates, complete): P1 is replaced with P1+P2. * This is a specialised function for the case when P2 is a non-zero point * in affine coordinates. * * This function returns the correct result in all cases. */ static uint32_t _src_ec_ec_p256_m62_cp256_add_complete_mixed(p256__src_ec_ec_p256_m62_cjacobian *P1, const _src_ec_ec_p256_m62_cp256_affine *P2) { /* * Addtions formulas, in the general case, are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * * These formulas mishandle the two following cases: * * - If P1 is the point-at-infinity (z1 = 0), then z3 is * incorrectly set to 0. * * - If P1 = P2, then u1 = u2 and s1 = s2, and x3, y3 and z3 * are all set to 0. * * However, if P1 + P2 = 0, then u1 = u2 but s1 != s2, and then * we correctly get z3 = 0 (the point-at-infinity). * * To fix the case P1 = 0, we perform at the end a copy of P2 * over P1, conditional to z1 = 0. * * For P1 = P2: in that case, both h and r are set to 0, and * we get x3, y3 and z3 equal to 0. We can test for that * occurrence to make a mask which will be all-one if P1 = P2, * or all-zero otherwise; then we can compute the double of P2 * and add it, combined with the mask, to (x3,y3,z3). * * Using the doubling formulas in _src_ec_ec_p256_m62_cp256_double() on (x2,y2), * simplifying since P2 is affine (i.e. z2 = 1, implicitly), * we get: * s = 4*x2*y2^2 * m = 3*(x2 + 1)*(x2 - 1) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y2^4 * z' = 2*y2 * which requires only 6 multiplications. Added to the 11 * multiplications of the normal mixed addition in Jacobian * coordinates, we get a cost of 17 multiplications in total. */ uint64_t t1[5], t2[5], t3[5], t4[5], t5[5], t6[5], t7[5], tt, zz; int i; /* * Set zz to -1 if P1 is the point at infinity, 0 otherwise. */ zz = P1->z[0] | P1->z[1] | P1->z[2] | P1->z[3] | P1->z[4]; zz = ((zz | -zz) >> 63) - (uint64_t)1; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m62_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m62_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m62_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m62_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * reduce. */ _src_ec_ec_p256_m62_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m62_cf256_sub(t4, t4, t3); /* * If both h = 0 and r = 0, then P1 = P2, and we want to set * the mask tt to -1; otherwise, the mask will be 0. */ _src_ec_ec_p256_m62_cf256_final_reduce(t2); _src_ec_ec_p256_m62_cf256_final_reduce(t4); tt = t2[0] | t2[1] | t2[2] | t2[3] | t2[4] | t4[0] | t4[1] | t4[2] | t4[3] | t4[4]; tt = ((tt | -tt) >> 63) - (uint64_t)1; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m62_cf256_montysquare(t7, t2); _src_ec_ec_p256_m62_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m62_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m62_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m62_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m62_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m62_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m62_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m62_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1. */ _src_ec_ec_p256_m62_cf256_montymul(P1->z, P1->z, t2); /* * The "double" result, in case P1 = P2. */ /* * Compute z' = 2*y2 (in t1). */ _src_ec_ec_p256_m62_cf256_add(t1, P2->y, P2->y); f256_partial_reduce(t1); /* * Compute 2*(y2^2) (in t2) and s = 4*x2*(y2^2) (in t3). */ _src_ec_ec_p256_m62_cf256_montysquare(t2, P2->y); _src_ec_ec_p256_m62_cf256_add(t2, t2, t2); _src_ec_ec_p256_m62_cf256_add(t3, t2, t2); _src_ec_ec_p256_m62_cf256_montymul(t3, P2->x, t3); /* * Compute m = 3*(x2^2 - 1) (in t4). */ _src_ec_ec_p256_m62_cf256_montysquare(t4, P2->x); _src_ec_ec_p256_m62_cf256_sub(t4, t4, _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R); _src_ec_ec_p256_m62_cf256_add(t5, t4, t4); _src_ec_ec_p256_m62_cf256_add(t4, t4, t5); /* * Compute x' = m^2 - 2*s (in t5). */ _src_ec_ec_p256_m62_cf256_montysquare(t5, t4); _src_ec_ec_p256_m62_cf256_sub(t5, t3); _src_ec_ec_p256_m62_cf256_sub(t5, t3); /* * Compute y' = m*(s - x') - 8*y2^4 (in t6). */ _src_ec_ec_p256_m62_cf256_sub(t6, t3, t5); _src_ec_ec_p256_m62_cf256_montymul(t6, t6, t4); _src_ec_ec_p256_m62_cf256_montysquare(t7, t2); _src_ec_ec_p256_m62_cf256_sub(t6, t6, t7); _src_ec_ec_p256_m62_cf256_sub(t6, t6, t7); /* * We now have the alternate (doubling) coordinates in (t5,t6,t1). * We combine them with (x3,y3,z3). */ for (i = 0; i < 5; i ++) { P1->x[i] |= tt & t5[i]; P1->y[i] |= tt & t6[i]; P1->z[i] |= tt & t1[i]; } /* * If P1 = 0, then we get z3 = 0 (which is invalid); if z1 is 0, * then we want to replace the result with a copy of P2. The * test on z1 was done at the start, in the zz mask. */ for (i = 0; i < 5; i ++) { P1->x[i] ^= zz & (P1->x[i] ^ P2->x[i]); P1->y[i] ^= zz & (P1->y[i] ^ P2->y[i]); P1->z[i] ^= zz & (P1->z[i] ^ _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R[i]); } } #endif /* * Inner function for computing a point multiplication. A window is * provided, with points 1*P to 15*P in affine coordinates. * * Assumptions: * - All provided points are valid points on the curve. * - Multiplier is non-zero, and smaller than the curve order. * - Everything is in Montgomery representation. */ static void _src_ec_ec_p256_m62_cpoint_mul_inner(p256__src_ec_ec_p256_m62_cjacobian *R, const _src_ec_ec_p256_m62_cp256_affine *W, const unsigned char *k, size_t klen) { p256__src_ec_ec_p256_m62_cjacobian Q; uint32_t qz; memset(&Q, 0, sizeof Q); qz = 1; while (klen -- > 0) { int i; unsigned bk; bk = *k ++; for (i = 0; i < 2; i ++) { uint32_t bits; uint32_t bnz; _src_ec_ec_p256_m62_cp256_affine T; p256__src_ec_ec_p256_m62_cjacobian U; uint32_t n; int j; uint64_t m; _src_ec_ec_p256_m62_cp256_double(&Q); _src_ec_ec_p256_m62_cp256_double(&Q); _src_ec_ec_p256_m62_cp256_double(&Q); _src_ec_ec_p256_m62_cp256_double(&Q); bits = (bk >> 4) & 0x0F; bnz = NEQ(bits, 0); /* * Lookup point in window. If the bits are 0, * we get something invalid, which is not a * problem because we will use it only if the * bits are non-zero. */ memset(&T, 0, sizeof T); for (n = 0; n < 15; n ++) { m = -(uint64_t)EQ(bits, n + 1); T.x[0] |= m & W[n].x[0]; T.x[1] |= m & W[n].x[1]; T.x[2] |= m & W[n].x[2]; T.x[3] |= m & W[n].x[3]; T.x[4] |= m & W[n].x[4]; T.y[0] |= m & W[n].y[0]; T.y[1] |= m & W[n].y[1]; T.y[2] |= m & W[n].y[2]; T.y[3] |= m & W[n].y[3]; T.y[4] |= m & W[n].y[4]; } U = Q; _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cp256_add_mixed(&U, &T); /* * If qz is still 1, then Q was all-zeros, and this * is conserved through _src_ec_ec_p256_m62_cp256_double(). */ m = -(uint64_t)(bnz & qz); for (j = 0; j < 5; j ++) { Q.x[j] ^= m & (Q.x[j] ^ T.x[j]); Q.y[j] ^= m & (Q.y[j] ^ T.y[j]); Q.z[j] ^= m & (Q.z[j] ^ _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R[j]); } CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; bk <<= 4; } } *R = Q; } /* * Convert a window from Jacobian to affine coordinates. A single * field inversion is used. This function works for windows up to * 32 elements. * * The destination array (aff[]) and the source array (jac[]) may * overlap, provided that the start of aff[] is not after the start of * jac[]. Even if the arrays do _not_ overlap, the source array is * modified. */ static void _src_ec_ec_p256_m62_cwindow_to_affine(_src_ec_ec_p256_m62_cp256_affine *aff, p256__src_ec_ec_p256_m62_cjacobian *jac, int num) { /* * Convert the window points to affine coordinates. We use the * following trick to mutualize the inversion computation: if * we have z1, z2, z3, and z4, and want to invert all of them, * we compute u = 1/(z1*z2*z3*z4), and then we have: * 1/z1 = u*z2*z3*z4 * 1/z2 = u*z1*z3*z4 * 1/z3 = u*z1*z2*z4 * 1/z4 = u*z1*z2*z3 * * The partial products are computed recursively: * * - on input (z_1,z_2), return (z_2,z_1) and z_1*z_2 * - on input (z_1,z_2,... z_n): * recurse on (z_1,z_2,... z_(n/2)) -> r1 and m1 * recurse on (z_(n/2+1),z_(n/2+2)... z_n) -> r2 and m2 * multiply elements of r1 by m2 -> s1 * multiply elements of r2 by m1 -> s2 * return r1||r2 and m1*m2 * * In the example below, we suppose that we have 14 elements. * Let z1, z2,... zE be the 14 values to invert (index noted in * hexadecimal, starting at 1). * * - Depth 1: * swap(z1, z2); z12 = z1*z2 * swap(z3, z4); z34 = z3*z4 * swap(z5, z6); z56 = z5*z6 * swap(z7, z8); z78 = z7*z8 * swap(z9, zA); z9A = z9*zA * swap(zB, zC); zBC = zB*zC * swap(zD, zE); zDE = zD*zE * * - Depth 2: * z1 <- z1*z34, z2 <- z2*z34, z3 <- z3*z12, z4 <- z4*z12 * z1234 = z12*z34 * z5 <- z5*z78, z6 <- z6*z78, z7 <- z7*z56, z8 <- z8*z56 * z5678 = z56*z78 * z9 <- z9*zBC, zA <- zA*zBC, zB <- zB*z9A, zC <- zC*z9A * z9ABC = z9A*zBC * * - Depth 3: * z1 <- z1*z5678, z2 <- z2*z5678, z3 <- z3*z5678, z4 <- z4*z5678 * z5 <- z5*z1234, z6 <- z6*z1234, z7 <- z7*z1234, z8 <- z8*z1234 * z12345678 = z1234*z5678 * z9 <- z9*zDE, zA <- zA*zDE, zB <- zB*zDE, zC <- zC*zDE * zD <- zD*z9ABC, zE*z9ABC * z9ABCDE = z9ABC*zDE * * - Depth 4: * multiply z1..z8 by z9ABCDE * multiply z9..zE by z12345678 * final z = z12345678*z9ABCDE */ uint64_t z[16][5]; int i, k, s; #define zt (z[15]) #define zu (z[14]) #define zv (z[13]) /* * First recursion step (pairwise swapping and multiplication). * If there is an odd number of elements, then we "invent" an * extra one with coordinate Z = 1 (in Montgomery representation). */ for (i = 0; (i + 1) < num; i += 2) { memcpy(zt, jac[i].z, sizeof zt); memcpy(jac[i].z, jac[i + 1].z, sizeof zt); memcpy(jac[i + 1].z, zt, sizeof zt); _src_ec_ec_p256_m62_cf256_montymul(z[i >> 1], jac[i].z, jac[i + 1].z); } if ((num & 1) != 0) { memcpy(z[num >> 1], jac[num - 1].z, sizeof zt); memcpy(jac[num - 1].z, _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R, sizeof _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cF256_R); } /* * Perform further recursion steps. At the entry of each step, * the process has been done for groups of 's' points. The * integer k is the log2 of s. */ for (k = 1, s = 2; s < num; k ++, s <<= 1) { int n; for (i = 0; i < num; i ++) { _src_ec_ec_p256_m62_cf256_montymul(jac[i].z, jac[i].z, z[(i >> k) ^ 1]); } n = (num + s - 1) >> k; for (i = 0; i < (n >> 1); i ++) { _src_ec_ec_p256_m62_cf256_montymul(z[i], z[i << 1], z[(i << 1) + 1]); } if ((n & 1) != 0) { memmove(z[n >> 1], z[n], sizeof zt); } } /* * Invert the final result, and convert all points. */ _src_ec_ec_p256_m62_cf256_invert(zt, z[0]); for (i = 0; i < num; i ++) { _src_ec_ec_p256_m62_cf256_montymul(zv, jac[i].z, zt); _src_ec_ec_p256_m62_cf256_montysquare(zu, zv); _src_ec_ec_p256_m62_cf256_montymul(zv, zv, zu); _src_ec_ec_p256_m62_cf256_montymul(aff[i].x, jac[i].x, zu); _src_ec_ec_p256_m62_cf256_montymul(aff[i].y, jac[i].y, zv); } } /* * Multiply the provided point by an integer. * Assumptions: * - Source point is a valid curve point. * - Source point is not the point-at-infinity. * - Integer is not 0, and is lower than the curve order. * If these conditions are not met, then the result is indeterminate * (but the process is still constant-time). */ static void _src_ec_ec_p256_m62_cp256_mul(p256__src_ec_ec_p256_m62_cjacobian *P, const unsigned char *k, size_t klen) { union { _src_ec_ec_p256_m62_cp256_affine aff[15]; p256__src_ec_ec_p256_m62_cjacobian jac[15]; } window; int i; /* * Compute window, in Jacobian coordinates. */ window.jac[0] = *P; for (i = 2; i < 16; i ++) { window.jac[i - 1] = window.jac[(i >> 1) - 1]; if ((i & 1) == 0) { _src_ec_ec_p256_m62_cp256_double(&window.jac[i - 1]); } else { _src_ec_ec_p256_m62_cp256_add(&window.jac[i - 1], &window.jac[i >> 1]); } } /* * Convert the window points to affine coordinates. Point * window[0] is the source point, already in affine coordinates. */ _src_ec_ec_p256_m62_cwindow_to_affine(window.aff, window.jac, 15); /* * Perform point multiplication. */ _src_ec_ec_p256_m62_cpoint_mul_inner(P, window.aff, k, klen); } /* * Precomputed window for the conventional generator: _src_ec_ec_p256_m62_cP256__src_ec_ec_p256_m62_cGwin[n] * contains (n+1)*G (affine coordinates, in Montgomery representation). */ static const _src_ec_ec_p256_m62_cp256_affine _src_ec_ec_p256_m62_cP256__src_ec_ec_p256_m62_cGwin[] = { { { 0x30D418A9143C1, 0xC4FEDB60179E7, 0x62251075BA95F, 0x5C669FB732B77, 0x08905F76B5375 }, { 0x5357CE95560A8, 0x43A19E45CDDF2, 0x21F3258B4AB8E, 0xD8552E88688DD, 0x0571FF18A5885 } }, { { 0x46D410DDD64DF, 0x0B433827D8500, 0x1490D9AA6AE3C, 0xA3A832205038D, 0x06BB32E52DCF3 }, { 0x48D361BEE1A57, 0xB7B236FF82F36, 0x042DBE152CD7C, 0xA3AA9A8FB0E92, 0x08C577517A5B8 } }, { { 0x3F904EEBC1272, 0x9E87D81FBFFAC, 0xCBBC98B027F84, 0x47E46AD77DD87, 0x06936A3FD6FF7 }, { 0x5C1FC983A7EBD, 0xC3861FE1AB04C, 0x2EE98E583E47A, 0xC06A88208311A, 0x05F06A2AB587C } }, { { 0xB50D46918DCC5, 0xD7623C17374B0, 0x100AF24650A6E, 0x76ABCDAACACE8, 0x077362F591B01 }, { 0xF24CE4CBABA68, 0x17AD6F4472D96, 0xDDD22E1762847, 0x862EB6C36DEE5, 0x04B14C39CC5AB } }, { { 0x8AAEC45C61F5C, 0x9D4B9537DBE1B, 0x76C20C90EC649, 0x3C7D41CB5AAD0, 0x0907960649052 }, { 0x9B4AE7BA4F107, 0xF75EB882BEB30, 0x7A1F6873C568E, 0x915C540A9877E, 0x03A076BB9DD1E } }, { { 0x47373E77664A1, 0xF246CEE3E4039, 0x17A3AD55AE744, 0x673C50A961A5B, 0x03074B5964213 }, { 0x6220D377E44BA, 0x30DFF14B593D3, 0x639F11299C2B5, 0x75F5424D44CEF, 0x04C9916DEA07F } }, { { 0x354EA0173B4F1, 0x3C23C00F70746, 0x23BB082BD2021, 0xE03E43EAAB50C, 0x03BA5119D3123 }, { 0xD0303F5B9D4DE, 0x17DA67BDD2847, 0xC941956742F2F, 0x8670F933BDC77, 0x0AEDD9164E240 } }, { { 0x4CD19499A78FB, 0x4BF9B345527F1, 0x2CFC6B462AB5C, 0x30CDF90F02AF0, 0x0763891F62652 }, { 0xA3A9532D49775, 0xD7F9EBA15F59D, 0x60BBF021E3327, 0xF75C23C7B84BE, 0x06EC12F2C706D } }, { { 0x6E8F264E20E8E, 0xC79A7A84175C9, 0xC8EB00ABE6BFE, 0x16A4CC09C0444, 0x005B3081D0C4E }, { 0x777AA45F33140, 0xDCE5D45E31EB7, 0xB12F1A56AF7BE, 0xF9B2B6E019A88, 0x086659CDFD835 } }, { { 0xDBD19DC21EC8C, 0x94FCF81392C18, 0x250B4998F9868, 0x28EB37D2CD648, 0x0C61C947E4B34 }, { 0x407880DD9E767, 0x0C83FBE080C2B, 0x9BE5D2C43A899, 0xAB4EF7D2D6577, 0x08719A555B3B4 } }, { { 0x260A6245E4043, 0x53E7FDFE0EA7D, 0xAC1AB59DE4079, 0x072EFF3A4158D, 0x0E7090F1949C9 }, { 0x85612B944E886, 0xE857F61C81A76, 0xAD643D250F939, 0x88DAC0DAA891E, 0x089300244125B } }, { { 0x1AA7D26977684, 0x58A345A3304B7, 0x37385EABDEDEF, 0x155E409D29DEE, 0x0EE1DF780B83E }, { 0x12D91CBB5B437, 0x65A8956370CAC, 0xDE6D66170ED2F, 0xAC9B8228CFA8A, 0x0FF57C95C3238 } }, { { 0x25634B2ED7097, 0x9156FD30DCCC4, 0x9E98110E35676, 0x7594CBCD43F55, 0x038477ACC395B }, { 0x2B90C00EE17FF, 0xF842ED2E33575, 0x1F5BC16874838, 0x7968CD06422BD, 0x0BC0876AB9E7B } }, { { 0xA35BB0CF664AF, 0x68F9707E3A242, 0x832660126E48F, 0x72D2717BF54C6, 0x0AAE7333ED12C }, { 0x2DB7995D586B1, 0xE732237C227B5, 0x65E7DBBE29569, 0xBBBD8E4193E2A, 0x052706DC3EAA1 } }, { { 0xD8B7BC60055BE, 0xD76E27E4B72BC, 0x81937003CC23E, 0xA090E337424E4, 0x02AA0E43EAD3D }, { 0x524F6383C45D2, 0x422A41B2540B8, 0x8A4797D766355, 0xDF444EFA6DE77, 0x0042170A9079A } }, }; /* * Multiply the conventional generator of the curve by the provided * integer. Return is written in *P. * * Assumptions: * - Integer is not 0, and is lower than the curve order. * If this conditions is not met, then the result is indeterminate * (but the process is still constant-time). */ static void _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cp256_mulgen(p256__src_ec_ec_p256_m62_cjacobian *P, const unsigned char *k, size_t klen) { _src_ec_ec_p256_m62_cpoint_mul_inner(P, _src_ec_ec_p256_m62_cP256__src_ec_ec_p256_m62_cGwin, k, klen); } /* * Return 1 if all of the following hold: * - klen <= 32 * - k != 0 * - k is lower than the curve order * Otherwise, return 0. * * Constant-time behaviour: only klen may be observable. */ static uint32_t _src_ec_ec_p256_m62_ccheck_scalar(const unsigned char *k, size_t klen) { uint32_t z; int32_t c; size_t u; if (klen > 32) { return 0; } z = 0; for (u = 0; u < klen; u ++) { z |= k[u]; } if (klen == 32) { c = 0; for (u = 0; u < klen; u ++) { c |= -(int32_t)EQ0(c) & CMP(k[u], _src_ec_ec_p256_m62_cP256_N[u]); } } else { c = -1; } return NEQ(z, 0) & LT0(c); } static uint32_t _src_ec_ec_p256_m62_capi_mul(unsigned char *G, size_t Glen, const unsigned char *k, size_t klen, int curve) { uint32_t r; p256__src_ec_ec_p256_m62_cjacobian P; (void)curve; if (Glen != 65) { return 0; } r = _src_ec_ec_p256_m62_ccheck_scalar(k, klen); r &= _src_ec_ec_p256_m62_cpoint_decode(&P, G); _src_ec_ec_p256_m62_cp256_mul(&P, k, klen); r &= _src_ec_ec_p256_m62_cpoint_encode(G, &P); return r; } static size_t _src_ec_ec_p256_m62_capi_mulgen(unsigned char *R, const unsigned char *k, size_t klen, int curve) { p256__src_ec_ec_p256_m62_cjacobian P; (void)curve; _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cp256_mulgen(&P, k, klen); _src_ec_ec_p256_m62_cpoint_encode(R, &P); return 65; } static uint32_t _src_ec_ec_p256_m62_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We might want to use Shamir's trick here: make a composite * window of u*P+v*Q points, to merge the two doubling-ladders * into one. This, however, has some complications: * * - During the computation, we may hit the point-at-infinity. * Thus, we would need _src_ec_ec_p256_m62_cp256_add_complete_mixed() (complete * formulas for point addition), with a higher cost (17 muls * instead of 11). * * - A 4-bit window would be too large, since it would involve * 16*16-1 = 255 points. For the same window size as in the * _src_ec_ec_p256_m62_cp256_mul() case, we would need to reduce the window size * to 2 bits, and thus perform twice as many non-doubling * point additions. * * - The window may itself contain the point-at-infinity, and * thus cannot be in all generality be made of affine points. * Instead, we would need to make it a window of points in * Jacobian coordinates. Even _src_ec_ec_p256_m62_cp256_add_complete_mixed() would * be inappropriate. * * For these reasons, the code below performs two separate * point multiplications, then computes the final point addition * (which is both a "normal" addition, and a doubling, to handle * all cases). */ p256__src_ec_ec_p256_m62_cjacobian P, Q; uint32_t r, t, s; uint64_t z; (void)curve; if (len != 65) { return 0; } r = _src_ec_ec_p256_m62_cpoint_decode(&P, A); _src_ec_ec_p256_m62_cp256_mul(&P, x, xlen); if (B == NULL) { _src_ec_ec_p256_m62_c_src_ec_ec_p256_m62_cp256_mulgen(&Q, y, ylen); } else { r &= _src_ec_ec_p256_m62_cpoint_decode(&Q, B); _src_ec_ec_p256_m62_cp256_mul(&Q, y, ylen); } /* * The final addition may fail in case both points are equal. */ t = _src_ec_ec_p256_m62_cp256_add(&P, &Q); _src_ec_ec_p256_m62_cf256_final_reduce(P.z); z = P.z[0] | P.z[1] | P.z[2] | P.z[3] | P.z[4]; s = EQ((uint32_t)(z | (z >> 32)), 0); _src_ec_ec_p256_m62_cp256_double(&Q); /* * If s is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * s = 0, t = 0 return P (normal addition) * s = 0, t = 1 return P (normal addition) * s = 1, t = 0 return Q (a 'double' case) * s = 1, t = 1 report an error (P+Q = 0) */ CCOPY(s & ~t, &P, &Q, sizeof Q); _src_ec_ec_p256_m62_cpoint_encode(A, &P); r &= ~(s & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_p256_m62 = { (uint32_t)0x00800000, &_src_ec_ec_p256_m62_capi_generator, &_src_ec_ec_p256_m62_capi_order, &_src_ec_ec_p256_m62_capi_xoff, &_src_ec_ec_p256_m62_capi_mul, &_src_ec_ec_p256_m62_capi_mulgen, &_src_ec_ec_p256_m62_capi_muladd }; /* see bearssl_ec.h */ const br_ec_impl * br_ec_p256_m62_get(void) { return &br_ec_p256_m62; } #else /* see bearssl_ec.h */ const br_ec_impl * br_ec_p256_m62_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_UMUL128 #include #endif static const unsigned char _src_ec_ec_p256_m64_cP256_G[] = { 0x04, 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, 0x4F, 0xE3, 0x42, 0xE2, 0xFE, 0x1A, 0x7F, 0x9B, 0x8E, 0xE7, 0xEB, 0x4A, 0x7C, 0x0F, 0x9E, 0x16, 0x2B, 0xCE, 0x33, 0x57, 0x6B, 0x31, 0x5E, 0xCE, 0xCB, 0xB6, 0x40, 0x68, 0x37, 0xBF, 0x51, 0xF5 }; static const unsigned char _src_ec_ec_p256_m64_cP256_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51 }; static const unsigned char * _src_ec_ec_p256_m64_capi_generator(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m64_cP256_G; return _src_ec_ec_p256_m64_cP256_G; } static const unsigned char * _src_ec_ec_p256_m64_capi_order(int curve, size_t *len) { (void)curve; *len = sizeof _src_ec_ec_p256_m64_cP256_N; return _src_ec_ec_p256_m64_cP256_N; } static size_t _src_ec_ec_p256_m64_capi_xoff(int curve, size_t *len) { (void)curve; *len = 32; return 1; } /* * A field element is encoded as four 64-bit integers, in basis 2^64. * Values may reach up to 2^256-1. Montgomery multiplication is used. */ /* R = 2^256 mod p */ static const uint64_t _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R[] = { 0x0000000000000001, 0xFFFFFFFF00000000, 0xFFFFFFFFFFFFFFFF, 0x00000000FFFFFFFE }; /* Curve equation is y^2 = x^3 - 3*x + B. This constant is B*R mod p (Montgomery representation of B). */ static const uint64_t _src_ec_ec_p256_m64_cP256_B_MONTY[] = { 0xD89CDF6229C4BDDF, 0xACF005CD78843090, 0xE5A220ABF7212ED6, 0xDC30061D04874834 }; /* * Addition in the field. */ static inline void _src_ec_ec_p256_m64_cf256_add(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 unsigned __int128 w; uint64_t t; /* * Do the addition, with an extra carry in t. */ w = (unsigned __int128)a[0] + b[0]; d[0] = (uint64_t)w; w = (unsigned __int128)a[1] + b[1] + (w >> 64); d[1] = (uint64_t)w; w = (unsigned __int128)a[2] + b[2] + (w >> 64); d[2] = (uint64_t)w; w = (unsigned __int128)a[3] + b[3] + (w >> 64); d[3] = (uint64_t)w; t = (uint64_t)(w >> 64); /* * Fold carry t, using: 2^256 = 2^224 - 2^192 - 2^96 + 1 mod p. */ w = (unsigned __int128)d[0] + t; d[0] = (uint64_t)w; w = (unsigned __int128)d[1] + (w >> 64) - (t << 32); d[1] = (uint64_t)w; /* Here, carry "w >> 64" can only be 0 or -1 */ w = (unsigned __int128)d[2] - ((w >> 64) & 1); d[2] = (uint64_t)w; /* Again, carry is 0 or -1. But there can be carry only if t = 1, in which case the addition of (t << 32) - t is positive. */ w = (unsigned __int128)d[3] - ((w >> 64) & 1) + (t << 32) - t; d[3] = (uint64_t)w; t = (uint64_t)(w >> 64); /* * There can be an extra carry here, which we must fold again. */ w = (unsigned __int128)d[0] + t; d[0] = (uint64_t)w; w = (unsigned __int128)d[1] + (w >> 64) - (t << 32); d[1] = (uint64_t)w; w = (unsigned __int128)d[2] - ((w >> 64) & 1); d[2] = (uint64_t)w; d[3] += (t << 32) - t - (uint64_t)((w >> 64) & 1); #elif BR_UMUL128 unsigned char cc; uint64_t t; cc = _addcarry_u64(0, a[0], b[0], &d[0]); cc = _addcarry_u64(cc, a[1], b[1], &d[1]); cc = _addcarry_u64(cc, a[2], b[2], &d[2]); cc = _addcarry_u64(cc, a[3], b[3], &d[3]); /* * If there is a carry, then we want to subtract p, which we * do by adding 2^256 - p. */ t = cc; cc = _addcarry_u64(cc, d[0], 0, &d[0]); cc = _addcarry_u64(cc, d[1], -(t << 32), &d[1]); cc = _addcarry_u64(cc, d[2], -t, &d[2]); cc = _addcarry_u64(cc, d[3], (t << 32) - (t << 1), &d[3]); /* * We have to do it again if there still is a carry. */ t = cc; cc = _addcarry_u64(cc, d[0], 0, &d[0]); cc = _addcarry_u64(cc, d[1], -(t << 32), &d[1]); cc = _addcarry_u64(cc, d[2], -t, &d[2]); (void)_addcarry_u64(cc, d[3], (t << 32) - (t << 1), &d[3]); #endif } /* * Subtraction in the field. */ static inline void _src_ec_ec_p256_m64_cf256_sub(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 unsigned __int128 w; uint64_t t; w = (unsigned __int128)a[0] - b[0]; d[0] = (uint64_t)w; w = (unsigned __int128)a[1] - b[1] - ((w >> 64) & 1); d[1] = (uint64_t)w; w = (unsigned __int128)a[2] - b[2] - ((w >> 64) & 1); d[2] = (uint64_t)w; w = (unsigned __int128)a[3] - b[3] - ((w >> 64) & 1); d[3] = (uint64_t)w; t = (uint64_t)(w >> 64) & 1; /* * If there is a borrow (t = 1), then we must add the modulus * p = 2^256 - 2^224 + 2^192 + 2^96 - 1. */ w = (unsigned __int128)d[0] - t; d[0] = (uint64_t)w; w = (unsigned __int128)d[1] + (t << 32) - ((w >> 64) & 1); d[1] = (uint64_t)w; /* Here, carry "w >> 64" can only be 0 or +1 */ w = (unsigned __int128)d[2] + (w >> 64); d[2] = (uint64_t)w; /* Again, carry is 0 or +1 */ w = (unsigned __int128)d[3] + (w >> 64) - (t << 32) + t; d[3] = (uint64_t)w; t = (uint64_t)(w >> 64) & 1; /* * There may be again a borrow, in which case we must add the * modulus again. */ w = (unsigned __int128)d[0] - t; d[0] = (uint64_t)w; w = (unsigned __int128)d[1] + (t << 32) - ((w >> 64) & 1); d[1] = (uint64_t)w; w = (unsigned __int128)d[2] + (w >> 64); d[2] = (uint64_t)w; d[3] += (uint64_t)(w >> 64) - (t << 32) + t; #elif BR_UMUL128 unsigned char cc; uint64_t t; cc = _subborrow_u64(0, a[0], b[0], &d[0]); cc = _subborrow_u64(cc, a[1], b[1], &d[1]); cc = _subborrow_u64(cc, a[2], b[2], &d[2]); cc = _subborrow_u64(cc, a[3], b[3], &d[3]); /* * If there is a borrow, then we need to add p. We (virtually) * add 2^256, then subtract 2^256 - p. */ t = cc; cc = _subborrow_u64(0, d[0], t, &d[0]); cc = _subborrow_u64(cc, d[1], -(t << 32), &d[1]); cc = _subborrow_u64(cc, d[2], -t, &d[2]); cc = _subborrow_u64(cc, d[3], (t << 32) - (t << 1), &d[3]); /* * If there still is a borrow, then we need to add p again. */ t = cc; cc = _subborrow_u64(0, d[0], t, &d[0]); cc = _subborrow_u64(cc, d[1], -(t << 32), &d[1]); cc = _subborrow_u64(cc, d[2], -t, &d[2]); (void)_subborrow_u64(cc, d[3], (t << 32) - (t << 1), &d[3]); #endif } /* * Montgomery multiplication in the field. */ static void _src_ec_ec_p256_m64_cf256_montymul(uint64_t *d, const uint64_t *a, const uint64_t *b) { #if BR_INT128 uint64_t x, f, t0, t1, t2, t3, t4; unsigned __int128 z, ff; int i; /* * When computing d <- d + a[u]*b, we also add f*p such * that d + a[u]*b + f*p is a multiple of 2^64. Since * p = -1 mod 2^64, we can compute f = d[0] + a[u]*b[0] mod 2^64. */ /* * Step 1: t <- (a[0]*b + f*p) / 2^64 * We have f = a[0]*b[0] mod 2^64. Since p = -1 mod 2^64, this * ensures that (a[0]*b + f*p) is a multiple of 2^64. * * We also have: f*p = f*2^256 - f*2^224 + f*2^192 + f*2^96 - f. */ x = a[0]; z = (unsigned __int128)b[0] * x; f = (uint64_t)z; z = (unsigned __int128)b[1] * x + (z >> 64) + (uint64_t)(f << 32); t0 = (uint64_t)z; z = (unsigned __int128)b[2] * x + (z >> 64) + (uint64_t)(f >> 32); t1 = (uint64_t)z; z = (unsigned __int128)b[3] * x + (z >> 64) + f; t2 = (uint64_t)z; t3 = (uint64_t)(z >> 64); ff = ((unsigned __int128)f << 64) - ((unsigned __int128)f << 32); z = (unsigned __int128)t2 + (uint64_t)ff; t2 = (uint64_t)z; z = (unsigned __int128)t3 + (z >> 64) + (ff >> 64); t3 = (uint64_t)z; t4 = (uint64_t)(z >> 64); /* * Steps 2 to 4: t <- (t + a[i]*b + f*p) / 2^64 */ for (i = 1; i < 4; i ++) { x = a[i]; /* t <- (t + x*b - f) / 2^64 */ z = (unsigned __int128)b[0] * x + t0; f = (uint64_t)z; z = (unsigned __int128)b[1] * x + t1 + (z >> 64); t0 = (uint64_t)z; z = (unsigned __int128)b[2] * x + t2 + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)b[3] * x + t3 + (z >> 64); t2 = (uint64_t)z; z = t4 + (z >> 64); t3 = (uint64_t)z; t4 = (uint64_t)(z >> 64); /* t <- t + f*2^32, carry in the upper half of z */ z = (unsigned __int128)t0 + (uint64_t)(f << 32); t0 = (uint64_t)z; z = (z >> 64) + (unsigned __int128)t1 + (uint64_t)(f >> 32); t1 = (uint64_t)z; /* t <- t + f*2^192 - f*2^160 + f*2^128 */ ff = ((unsigned __int128)f << 64) - ((unsigned __int128)f << 32) + f; z = (z >> 64) + (unsigned __int128)t2 + (uint64_t)ff; t2 = (uint64_t)z; z = (unsigned __int128)t3 + (z >> 64) + (ff >> 64); t3 = (uint64_t)z; t4 += (uint64_t)(z >> 64); } /* * At that point, we have computed t = (a*b + F*p) / 2^256, where * F is a 256-bit integer whose limbs are the "f" coefficients * in the steps above. We have: * a <= 2^256-1 * b <= 2^256-1 * F <= 2^256-1 * Hence: * a*b + F*p <= (2^256-1)*(2^256-1) + p*(2^256-1) * a*b + F*p <= 2^256*(2^256 - 2 + p) + 1 - p * Therefore: * t < 2^256 + p - 2 * Since p < 2^256, it follows that: * t4 can be only 0 or 1 * t - p < 2^256 * We can therefore subtract p from t, conditionally on t4, to * get a nonnegative result that fits on 256 bits. */ z = (unsigned __int128)t0 + t4; t0 = (uint64_t)z; z = (unsigned __int128)t1 - (t4 << 32) + (z >> 64); t1 = (uint64_t)z; z = (unsigned __int128)t2 - (z >> 127); t2 = (uint64_t)z; t3 = t3 - (uint64_t)(z >> 127) - t4 + (t4 << 32); d[0] = t0; d[1] = t1; d[2] = t2; d[3] = t3; #elif BR_UMUL128 uint64_t x, f, t0, t1, t2, t3, t4; uint64_t zl, zh, ffl, ffh; unsigned char k, m; int i; /* * When computing d <- d + a[u]*b, we also add f*p such * that d + a[u]*b + f*p is a multiple of 2^64. Since * p = -1 mod 2^64, we can compute f = d[0] + a[u]*b[0] mod 2^64. */ /* * Step 1: t <- (a[0]*b + f*p) / 2^64 * We have f = a[0]*b[0] mod 2^64. Since p = -1 mod 2^64, this * ensures that (a[0]*b + f*p) is a multiple of 2^64. * * We also have: f*p = f*2^256 - f*2^224 + f*2^192 + f*2^96 - f. */ x = a[0]; zl = _umul128(b[0], x, &zh); f = zl; t0 = zh; zl = _umul128(b[1], x, &zh); k = _addcarry_u64(0, zl, t0, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, f << 32, &zl); (void)_addcarry_u64(k, zh, 0, &zh); t0 = zl; t1 = zh; zl = _umul128(b[2], x, &zh); k = _addcarry_u64(0, zl, t1, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, f >> 32, &zl); (void)_addcarry_u64(k, zh, 0, &zh); t1 = zl; t2 = zh; zl = _umul128(b[3], x, &zh); k = _addcarry_u64(0, zl, t2, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, f, &zl); (void)_addcarry_u64(k, zh, 0, &zh); t2 = zl; t3 = zh; t4 = _addcarry_u64(0, t3, f, &t3); k = _subborrow_u64(0, t2, f << 32, &t2); k = _subborrow_u64(k, t3, f >> 32, &t3); (void)_subborrow_u64(k, t4, 0, &t4); /* * Steps 2 to 4: t <- (t + a[i]*b + f*p) / 2^64 */ for (i = 1; i < 4; i ++) { x = a[i]; /* f = t0 + x * b[0]; -- computed below */ /* t <- (t + x*b - f) / 2^64 */ zl = _umul128(b[0], x, &zh); k = _addcarry_u64(0, zl, t0, &f); (void)_addcarry_u64(k, zh, 0, &t0); zl = _umul128(b[1], x, &zh); k = _addcarry_u64(0, zl, t0, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, t1, &t0); (void)_addcarry_u64(k, zh, 0, &t1); zl = _umul128(b[2], x, &zh); k = _addcarry_u64(0, zl, t1, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, t2, &t1); (void)_addcarry_u64(k, zh, 0, &t2); zl = _umul128(b[3], x, &zh); k = _addcarry_u64(0, zl, t2, &zl); (void)_addcarry_u64(k, zh, 0, &zh); k = _addcarry_u64(0, zl, t3, &t2); (void)_addcarry_u64(k, zh, 0, &t3); t4 = _addcarry_u64(0, t3, t4, &t3); /* t <- t + f*2^32, carry in k */ k = _addcarry_u64(0, t0, f << 32, &t0); k = _addcarry_u64(k, t1, f >> 32, &t1); /* t <- t + f*2^192 - f*2^160 + f*2^128 */ m = _subborrow_u64(0, f, f << 32, &ffl); (void)_subborrow_u64(m, f, f >> 32, &ffh); k = _addcarry_u64(k, t2, ffl, &t2); k = _addcarry_u64(k, t3, ffh, &t3); (void)_addcarry_u64(k, t4, 0, &t4); } /* * At that point, we have computed t = (a*b + F*p) / 2^256, where * F is a 256-bit integer whose limbs are the "f" coefficients * in the steps above. We have: * a <= 2^256-1 * b <= 2^256-1 * F <= 2^256-1 * Hence: * a*b + F*p <= (2^256-1)*(2^256-1) + p*(2^256-1) * a*b + F*p <= 2^256*(2^256 - 2 + p) + 1 - p * Therefore: * t < 2^256 + p - 2 * Since p < 2^256, it follows that: * t4 can be only 0 or 1 * t - p < 2^256 * We can therefore subtract p from t, conditionally on t4, to * get a nonnegative result that fits on 256 bits. */ k = _addcarry_u64(0, t0, t4, &t0); k = _addcarry_u64(k, t1, -(t4 << 32), &t1); k = _addcarry_u64(k, t2, -t4, &t2); (void)_addcarry_u64(k, t3, (t4 << 32) - (t4 << 1), &t3); d[0] = t0; d[1] = t1; d[2] = t2; d[3] = t3; #endif } /* * Montgomery squaring in the field; currently a basic wrapper around * multiplication (inline, should be optimized away). * TODO: see if some extra speed can be gained here. */ static inline void _src_ec_ec_p256_m64_cf256_montysquare(uint64_t *d, const uint64_t *a) { _src_ec_ec_p256_m64_cf256_montymul(d, a, a); } /* * Convert to Montgomery representation. */ static void _src_ec_ec_p256_m64_cf256_tomonty(uint64_t *d, const uint64_t *a) { /* * R2 = 2^512 mod p. * If R = 2^256 mod p, then R2 = R^2 mod p; and the Montgomery * multiplication of a by R2 is: a*R2/R = a*R mod p, i.e. the * conversion to Montgomery representation. */ static const uint64_t R2[] = { 0x0000000000000003, 0xFFFFFFFBFFFFFFFF, 0xFFFFFFFFFFFFFFFE, 0x00000004FFFFFFFD }; _src_ec_ec_p256_m64_cf256_montymul(d, a, R2); } /* * Convert from Montgomery representation. */ static void _src_ec_ec_p256_m64_cf256_frommonty(uint64_t *d, const uint64_t *a) { /* * Montgomery multiplication by 1 is division by 2^256 modulo p. */ static const uint64_t one[] = { 1, 0, 0, 0 }; _src_ec_ec_p256_m64_cf256_montymul(d, a, one); } /* * Inversion in the field. If the source value is 0 modulo p, then this * returns 0 or p. This function uses Montgomery representation. */ static void _src_ec_ec_p256_m64_cf256_invert(uint64_t *d, const uint64_t *a) { /* * We compute a^(p-2) mod p. The exponent pattern (from high to * low) is: * - 32 bits of value 1 * - 31 bits of value 0 * - 1 bit of value 1 * - 96 bits of value 0 * - 94 bits of value 1 * - 1 bit of value 0 * - 1 bit of value 1 * To speed up the square-and-multiply algorithm, we precompute * a^(2^31-1). */ uint64_t r[4], t[4]; int i; memcpy(t, a, sizeof t); for (i = 0; i < 30; i ++) { _src_ec_ec_p256_m64_cf256_montysquare(t, t); _src_ec_ec_p256_m64_cf256_montymul(t, t, a); } memcpy(r, t, sizeof t); for (i = 224; i >= 0; i --) { _src_ec_ec_p256_m64_cf256_montysquare(r, r); switch (i) { case 0: case 2: case 192: case 224: _src_ec_ec_p256_m64_cf256_montymul(r, r, a); break; case 3: case 34: case 65: _src_ec_ec_p256_m64_cf256_montymul(r, r, t); break; } } memcpy(d, r, sizeof r); } /* * Finalize reduction. * Input value fits on 256 bits. This function subtracts p if and only * if the input is greater than or equal to p. */ static inline void _src_ec_ec_p256_m64_cf256_final_reduce(uint64_t *a) { #if BR_INT128 uint64_t t0, t1, t2, t3, cc; unsigned __int128 z; /* * We add 2^224 - 2^192 - 2^96 + 1 to a. If there is no carry, * then a < p; otherwise, the addition result we computed is * the value we must return. */ z = (unsigned __int128)a[0] + 1; t0 = (uint64_t)z; z = (unsigned __int128)a[1] + (z >> 64) - ((uint64_t)1 << 32); t1 = (uint64_t)z; z = (unsigned __int128)a[2] - (z >> 127); t2 = (uint64_t)z; z = (unsigned __int128)a[3] - (z >> 127) + 0xFFFFFFFF; t3 = (uint64_t)z; cc = -(uint64_t)(z >> 64); a[0] ^= cc & (a[0] ^ t0); a[1] ^= cc & (a[1] ^ t1); a[2] ^= cc & (a[2] ^ t2); a[3] ^= cc & (a[3] ^ t3); #elif BR_UMUL128 uint64_t t0, t1, t2, t3, m; unsigned char k; k = _addcarry_u64(0, a[0], (uint64_t)1, &t0); k = _addcarry_u64(k, a[1], -((uint64_t)1 << 32), &t1); k = _addcarry_u64(k, a[2], -(uint64_t)1, &t2); k = _addcarry_u64(k, a[3], ((uint64_t)1 << 32) - 2, &t3); m = -(uint64_t)k; a[0] ^= m & (a[0] ^ t0); a[1] ^= m & (a[1] ^ t1); a[2] ^= m & (a[2] ^ t2); a[3] ^= m & (a[3] ^ t3); #endif } /* * Points in affine and Jacobian coordinates. * * - In affine coordinates, the point-at-infinity cannot be encoded. * - Jacobian coordinates (X,Y,Z) correspond to affine (X/Z^2,Y/Z^3); * if Z = 0 then this is the point-at-infinity. */ typedef struct { uint64_t x[4]; uint64_t y[4]; } _src_ec_ec_p256_m64_cp256_affine; typedef struct { uint64_t x[4]; uint64_t y[4]; uint64_t z[4]; } p256__src_ec_ec_p256_m64_cjacobian; /* * Decode a point. The returned point is in Jacobian coordinates, but * with z = 1. If the encoding is invalid, or encodes a point which is * not on the curve, or encodes the point at infinity, then this function * returns 0. Otherwise, 1 is returned. * * The buffer is assumed to have length exactly 65 bytes. */ static uint32_t _src_ec_ec_p256_m64_cpoint_decode(p256__src_ec_ec_p256_m64_cjacobian *P, const unsigned char *buf) { uint64_t x[4], y[4], t[4], x3[4], tt; uint32_t r; /* * Header byte shall be 0x04. */ r = EQ(buf[0], 0x04); /* * Decode X and Y coordinates, and convert them into * Montgomery representation. */ x[3] = br_dec64be(buf + 1); x[2] = br_dec64be(buf + 9); x[1] = br_dec64be(buf + 17); x[0] = br_dec64be(buf + 25); y[3] = br_dec64be(buf + 33); y[2] = br_dec64be(buf + 41); y[1] = br_dec64be(buf + 49); y[0] = br_dec64be(buf + 57); _src_ec_ec_p256_m64_cf256_tomonty(x, x); _src_ec_ec_p256_m64_cf256_tomonty(y, y); /* * Verify y^2 = x^3 + A*x + B. In curve P-256, A = -3. * Note that the Montgomery representation of 0 is 0. We must * take care to apply the final reduction to make sure we have * 0 and not p. */ _src_ec_ec_p256_m64_cf256_montysquare(t, y); _src_ec_ec_p256_m64_cf256_montysquare(x3, x); _src_ec_ec_p256_m64_cf256_montymul(x3, x3, x); _src_ec_ec_p256_m64_cf256_sub(t, t, x3); _src_ec_ec_p256_m64_cf256_add(t, t, x); _src_ec_ec_p256_m64_cf256_add(t, t, x); _src_ec_ec_p256_m64_cf256_add(t, t, x); _src_ec_ec_p256_m64_cf256_sub(t, t, _src_ec_ec_p256_m64_cP256_B_MONTY); _src_ec_ec_p256_m64_cf256_final_reduce(t); tt = t[0] | t[1] | t[2] | t[3]; r &= EQ((uint32_t)(tt | (tt >> 32)), 0); /* * Return the point in Jacobian coordinates (and Montgomery * representation). */ memcpy(P->x, x, sizeof x); memcpy(P->y, y, sizeof y); memcpy(P->z, _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R, sizeof _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R); return r; } /* * Final conversion for a point: * - The point is converted back to affine coordinates. * - Final reduction is performed. * - The point is encoded into the provided buffer. * * If the point is the point-at-infinity, all operations are performed, * but the buffer contents are indeterminate, and 0 is returned. Otherwise, * the encoded point is written in the buffer, and 1 is returned. */ static uint32_t _src_ec_ec_p256_m64_cpoint_encode(unsigned char *buf, const p256__src_ec_ec_p256_m64_cjacobian *P) { uint64_t t1[4], t2[4], z; /* Set t1 = 1/z^2 and t2 = 1/z^3. */ _src_ec_ec_p256_m64_cf256_invert(t2, P->z); _src_ec_ec_p256_m64_cf256_montysquare(t1, t2); _src_ec_ec_p256_m64_cf256_montymul(t2, t2, t1); /* Compute affine coordinates x (in t1) and y (in t2). */ _src_ec_ec_p256_m64_cf256_montymul(t1, P->x, t1); _src_ec_ec_p256_m64_cf256_montymul(t2, P->y, t2); /* Convert back from Montgomery representation, and finalize reductions. */ _src_ec_ec_p256_m64_cf256_frommonty(t1, t1); _src_ec_ec_p256_m64_cf256_frommonty(t2, t2); _src_ec_ec_p256_m64_cf256_final_reduce(t1); _src_ec_ec_p256_m64_cf256_final_reduce(t2); /* Encode. */ buf[0] = 0x04; br_enc64be(buf + 1, t1[3]); br_enc64be(buf + 9, t1[2]); br_enc64be(buf + 17, t1[1]); br_enc64be(buf + 25, t1[0]); br_enc64be(buf + 33, t2[3]); br_enc64be(buf + 41, t2[2]); br_enc64be(buf + 49, t2[1]); br_enc64be(buf + 57, t2[0]); /* Return success if and only if P->z != 0. */ z = P->z[0] | P->z[1] | P->z[2] | P->z[3]; return NEQ((uint32_t)(z | z >> 32), 0); } /* * Point doubling in Jacobian coordinates: point P is doubled. * Note: if the source point is the point-at-infinity, then the result is * still the point-at-infinity, which is correct. Moreover, if the three * coordinates were zero, then they still are zero in the returned value. * * (Note: this is true even without the final reduction: if the three * coordinates are encoded as four words of value zero each, then the * result will also have all-zero coordinate encodings, not the alternate * encoding as the integer p.) */ static void _src_ec_ec_p256_m64_cp256_double(p256__src_ec_ec_p256_m64_cjacobian *P) { /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * These formulas work for all points, including points of order 2 * and points at infinity: * - If y = 0 then z' = 0. But there is no such point in P-256 * anyway. * - If z = 0 then z' = 0. */ uint64_t t1[4], t2[4], t3[4], t4[4]; /* * Compute z^2 in t1. */ _src_ec_ec_p256_m64_cf256_montysquare(t1, P->z); /* * Compute x-z^2 in t2 and x+z^2 in t1. */ _src_ec_ec_p256_m64_cf256_add(t2, P->x, t1); _src_ec_ec_p256_m64_cf256_sub(t1, P->x, t1); /* * Compute 3*(x+z^2)*(x-z^2) in t1. */ _src_ec_ec_p256_m64_cf256_montymul(t3, t1, t2); _src_ec_ec_p256_m64_cf256_add(t1, t3, t3); _src_ec_ec_p256_m64_cf256_add(t1, t3, t1); /* * Compute 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_p256_m64_cf256_montysquare(t3, P->y); _src_ec_ec_p256_m64_cf256_add(t3, t3, t3); _src_ec_ec_p256_m64_cf256_montymul(t2, P->x, t3); _src_ec_ec_p256_m64_cf256_add(t2, t2, t2); /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_p256_m64_cf256_montysquare(P->x, t1); _src_ec_ec_p256_m64_cf256_sub(P->x, P->x, t2); _src_ec_ec_p256_m64_cf256_sub(P->x, P->x, t2); /* * Compute z' = 2*y*z. */ _src_ec_ec_p256_m64_cf256_montymul(t4, P->y, P->z); _src_ec_ec_p256_m64_cf256_add(P->z, t4, t4); /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ _src_ec_ec_p256_m64_cf256_sub(t2, t2, P->x); _src_ec_ec_p256_m64_cf256_montymul(P->y, t1, t2); _src_ec_ec_p256_m64_cf256_montysquare(t4, t3); _src_ec_ec_p256_m64_cf256_add(t4, t4, t4); _src_ec_ec_p256_m64_cf256_sub(P->y, P->y, t4); } /* * Point addition (Jacobian coordinates): P1 is replaced with P1+P2. * This function computes the wrong result in the following cases: * * - If P1 == 0 but P2 != 0 * - If P1 != 0 but P2 == 0 * - If P1 == P2 * * In all three cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y coordinate. * - P1 == 0 and P2 == 0. * - The Y coordinate of one of the points is 0 and the other point is * the point at infinity. * * The third case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 and P2 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. * * Note that you can get a returned value of 0 with a correct result, * e.g. if P1 and P2 have the same Y coordinate, but distinct X coordinates. */ static uint32_t _src_ec_ec_p256_m64_cp256_add(p256__src_ec_ec_p256_m64_cjacobian *P1, const p256__src_ec_ec_p256_m64_cjacobian *P2) { /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 */ uint64_t t1[4], t2[4], t3[4], t4[4], t5[4], t6[4], t7[4], tt; uint32_t ret; /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_p256_m64_cf256_montysquare(t3, P2->z); _src_ec_ec_p256_m64_cf256_montymul(t1, P1->x, t3); _src_ec_ec_p256_m64_cf256_montymul(t4, P2->z, t3); _src_ec_ec_p256_m64_cf256_montymul(t3, P1->y, t4); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m64_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m64_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m64_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m64_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ _src_ec_ec_p256_m64_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m64_cf256_sub(t4, t4, t3); _src_ec_ec_p256_m64_cf256_final_reduce(t4); tt = t4[0] | t4[1] | t4[2] | t4[3]; ret = (uint32_t)(tt | (tt >> 32)); ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m64_cf256_montysquare(t7, t2); _src_ec_ec_p256_m64_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m64_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m64_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m64_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m64_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m64_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m64_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m64_cf256_montymul(t1, P1->z, P2->z); _src_ec_ec_p256_m64_cf256_montymul(P1->z, t1, t2); return ret; } /* * Point addition (mixed coordinates): P1 is replaced with P1+P2. * This is a specialised function for the case when P2 is a non-zero point * in affine coordinates. * * This function computes the wrong result in the following cases: * * - If P1 == 0 * - If P1 == P2 * * In both cases, P1 is set to the point at infinity. * * Returned value is 0 if one of the following occurs: * * - P1 and P2 have the same Y (affine) coordinate. * - The Y coordinate of P2 is 0 and P1 is the point at infinity. * * The second case cannot actually happen with valid points, since a point * with Y == 0 is a point of order 2, and there is no point of order 2 on * curve P-256. * * Therefore, assuming that P1 != 0 on input, then the caller * can apply the following: * * - If the result is not the point at infinity, then it is correct. * - Otherwise, if the returned value is 1, then this is a case of * P1+P2 == 0, so the result is indeed the point at infinity. * - Otherwise, P1 == P2, so a "double" operation should have been * performed. * * Again, a value of 0 may be returned in some cases where the addition * result is correct. */ static uint32_t _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cp256_add_mixed(p256__src_ec_ec_p256_m64_cjacobian *P1, const _src_ec_ec_p256_m64_cp256_affine *P2) { /* * Addtions formulas are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 */ uint64_t t1[4], t2[4], t3[4], t4[4], t5[4], t6[4], t7[4], tt; uint32_t ret; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m64_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m64_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m64_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m64_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * We need to test whether r is zero, so we will do some extra * reduce. */ _src_ec_ec_p256_m64_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m64_cf256_sub(t4, t4, t3); _src_ec_ec_p256_m64_cf256_final_reduce(t4); tt = t4[0] | t4[1] | t4[2] | t4[3]; ret = (uint32_t)(tt | (tt >> 32)); ret = (ret | -ret) >> 31; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m64_cf256_montysquare(t7, t2); _src_ec_ec_p256_m64_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m64_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m64_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m64_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m64_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m64_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m64_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1*z2. */ _src_ec_ec_p256_m64_cf256_montymul(P1->z, P1->z, t2); return ret; } #if 0 /* unused */ /* * Point addition (mixed coordinates, complete): P1 is replaced with P1+P2. * This is a specialised function for the case when P2 is a non-zero point * in affine coordinates. * * This function returns the correct result in all cases. */ static uint32_t _src_ec_ec_p256_m64_cp256_add_complete_mixed(p256__src_ec_ec_p256_m64_cjacobian *P1, const _src_ec_ec_p256_m64_cp256_affine *P2) { /* * Addtions formulas, in the general case, are: * * u1 = x1 * u2 = x2 * z1^2 * s1 = y1 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * * These formulas mishandle the two following cases: * * - If P1 is the point-at-infinity (z1 = 0), then z3 is * incorrectly set to 0. * * - If P1 = P2, then u1 = u2 and s1 = s2, and x3, y3 and z3 * are all set to 0. * * However, if P1 + P2 = 0, then u1 = u2 but s1 != s2, and then * we correctly get z3 = 0 (the point-at-infinity). * * To fix the case P1 = 0, we perform at the end a copy of P2 * over P1, conditional to z1 = 0. * * For P1 = P2: in that case, both h and r are set to 0, and * we get x3, y3 and z3 equal to 0. We can test for that * occurrence to make a mask which will be all-one if P1 = P2, * or all-zero otherwise; then we can compute the double of P2 * and add it, combined with the mask, to (x3,y3,z3). * * Using the doubling formulas in _src_ec_ec_p256_m64_cp256_double() on (x2,y2), * simplifying since P2 is affine (i.e. z2 = 1, implicitly), * we get: * s = 4*x2*y2^2 * m = 3*(x2 + 1)*(x2 - 1) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y2^4 * z' = 2*y2 * which requires only 6 multiplications. Added to the 11 * multiplications of the normal mixed addition in Jacobian * coordinates, we get a cost of 17 multiplications in total. */ uint64_t t1[4], t2[4], t3[4], t4[4], t5[4], t6[4], t7[4], tt, zz; int i; /* * Set zz to -1 if P1 is the point at infinity, 0 otherwise. */ zz = P1->z[0] | P1->z[1] | P1->z[2] | P1->z[3]; zz = ((zz | -zz) >> 63) - (uint64_t)1; /* * Compute u1 = x1 (in t1) and s1 = y1 (in t3). */ memcpy(t1, P1->x, sizeof t1); memcpy(t3, P1->y, sizeof t3); /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_p256_m64_cf256_montysquare(t4, P1->z); _src_ec_ec_p256_m64_cf256_montymul(t2, P2->x, t4); _src_ec_ec_p256_m64_cf256_montymul(t5, P1->z, t4); _src_ec_ec_p256_m64_cf256_montymul(t4, P2->y, t5); /* * Compute h = h2 - u1 (in t2) and r = s2 - s1 (in t4). * reduce. */ _src_ec_ec_p256_m64_cf256_sub(t2, t2, t1); _src_ec_ec_p256_m64_cf256_sub(t4, t4, t3); /* * If both h = 0 and r = 0, then P1 = P2, and we want to set * the mask tt to -1; otherwise, the mask will be 0. */ _src_ec_ec_p256_m64_cf256_final_reduce(t2); _src_ec_ec_p256_m64_cf256_final_reduce(t4); tt = t2[0] | t2[1] | t2[2] | t2[3] | t4[0] | t4[1] | t4[2] | t4[3]; tt = ((tt | -tt) >> 63) - (uint64_t)1; /* * Compute u1*h^2 (in t6) and h^3 (in t5); */ _src_ec_ec_p256_m64_cf256_montysquare(t7, t2); _src_ec_ec_p256_m64_cf256_montymul(t6, t1, t7); _src_ec_ec_p256_m64_cf256_montymul(t5, t7, t2); /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. */ _src_ec_ec_p256_m64_cf256_montysquare(P1->x, t4); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t5); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); _src_ec_ec_p256_m64_cf256_sub(P1->x, P1->x, t6); /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ _src_ec_ec_p256_m64_cf256_sub(t6, t6, P1->x); _src_ec_ec_p256_m64_cf256_montymul(P1->y, t4, t6); _src_ec_ec_p256_m64_cf256_montymul(t1, t5, t3); _src_ec_ec_p256_m64_cf256_sub(P1->y, P1->y, t1); /* * Compute z3 = h*z1. */ _src_ec_ec_p256_m64_cf256_montymul(P1->z, P1->z, t2); /* * The "double" result, in case P1 = P2. */ /* * Compute z' = 2*y2 (in t1). */ _src_ec_ec_p256_m64_cf256_add(t1, P2->y, P2->y); /* * Compute 2*(y2^2) (in t2) and s = 4*x2*(y2^2) (in t3). */ _src_ec_ec_p256_m64_cf256_montysquare(t2, P2->y); _src_ec_ec_p256_m64_cf256_add(t2, t2, t2); _src_ec_ec_p256_m64_cf256_add(t3, t2, t2); _src_ec_ec_p256_m64_cf256_montymul(t3, P2->x, t3); /* * Compute m = 3*(x2^2 - 1) (in t4). */ _src_ec_ec_p256_m64_cf256_montysquare(t4, P2->x); _src_ec_ec_p256_m64_cf256_sub(t4, t4, _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R); _src_ec_ec_p256_m64_cf256_add(t5, t4, t4); _src_ec_ec_p256_m64_cf256_add(t4, t4, t5); /* * Compute x' = m^2 - 2*s (in t5). */ _src_ec_ec_p256_m64_cf256_montysquare(t5, t4); _src_ec_ec_p256_m64_cf256_sub(t5, t3); _src_ec_ec_p256_m64_cf256_sub(t5, t3); /* * Compute y' = m*(s - x') - 8*y2^4 (in t6). */ _src_ec_ec_p256_m64_cf256_sub(t6, t3, t5); _src_ec_ec_p256_m64_cf256_montymul(t6, t6, t4); _src_ec_ec_p256_m64_cf256_montysquare(t7, t2); _src_ec_ec_p256_m64_cf256_sub(t6, t6, t7); _src_ec_ec_p256_m64_cf256_sub(t6, t6, t7); /* * We now have the alternate (doubling) coordinates in (t5,t6,t1). * We combine them with (x3,y3,z3). */ for (i = 0; i < 4; i ++) { P1->x[i] |= tt & t5[i]; P1->y[i] |= tt & t6[i]; P1->z[i] |= tt & t1[i]; } /* * If P1 = 0, then we get z3 = 0 (which is invalid); if z1 is 0, * then we want to replace the result with a copy of P2. The * test on z1 was done at the start, in the zz mask. */ for (i = 0; i < 4; i ++) { P1->x[i] ^= zz & (P1->x[i] ^ P2->x[i]); P1->y[i] ^= zz & (P1->y[i] ^ P2->y[i]); P1->z[i] ^= zz & (P1->z[i] ^ _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R[i]); } } #endif /* * Inner function for computing a point multiplication. A window is * provided, with points 1*P to 15*P in affine coordinates. * * Assumptions: * - All provided points are valid points on the curve. * - Multiplier is non-zero, and smaller than the curve order. * - Everything is in Montgomery representation. */ static void _src_ec_ec_p256_m64_cpoint_mul_inner(p256__src_ec_ec_p256_m64_cjacobian *R, const _src_ec_ec_p256_m64_cp256_affine *W, const unsigned char *k, size_t klen) { p256__src_ec_ec_p256_m64_cjacobian Q; uint32_t qz; memset(&Q, 0, sizeof Q); qz = 1; while (klen -- > 0) { int i; unsigned bk; bk = *k ++; for (i = 0; i < 2; i ++) { uint32_t bits; uint32_t bnz; _src_ec_ec_p256_m64_cp256_affine T; p256__src_ec_ec_p256_m64_cjacobian U; uint32_t n; int j; uint64_t m; _src_ec_ec_p256_m64_cp256_double(&Q); _src_ec_ec_p256_m64_cp256_double(&Q); _src_ec_ec_p256_m64_cp256_double(&Q); _src_ec_ec_p256_m64_cp256_double(&Q); bits = (bk >> 4) & 0x0F; bnz = NEQ(bits, 0); /* * Lookup point in window. If the bits are 0, * we get something invalid, which is not a * problem because we will use it only if the * bits are non-zero. */ memset(&T, 0, sizeof T); for (n = 0; n < 15; n ++) { m = -(uint64_t)EQ(bits, n + 1); T.x[0] |= m & W[n].x[0]; T.x[1] |= m & W[n].x[1]; T.x[2] |= m & W[n].x[2]; T.x[3] |= m & W[n].x[3]; T.y[0] |= m & W[n].y[0]; T.y[1] |= m & W[n].y[1]; T.y[2] |= m & W[n].y[2]; T.y[3] |= m & W[n].y[3]; } U = Q; _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cp256_add_mixed(&U, &T); /* * If qz is still 1, then Q was all-zeros, and this * is conserved through _src_ec_ec_p256_m64_cp256_double(). */ m = -(uint64_t)(bnz & qz); for (j = 0; j < 4; j ++) { Q.x[j] |= m & T.x[j]; Q.y[j] |= m & T.y[j]; Q.z[j] |= m & _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R[j]; } CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; bk <<= 4; } } *R = Q; } /* * Convert a window from Jacobian to affine coordinates. A single * field inversion is used. This function works for windows up to * 32 elements. * * The destination array (aff[]) and the source array (jac[]) may * overlap, provided that the start of aff[] is not after the start of * jac[]. Even if the arrays do _not_ overlap, the source array is * modified. */ static void _src_ec_ec_p256_m64_cwindow_to_affine(_src_ec_ec_p256_m64_cp256_affine *aff, p256__src_ec_ec_p256_m64_cjacobian *jac, int num) { /* * Convert the window points to affine coordinates. We use the * following trick to mutualize the inversion computation: if * we have z1, z2, z3, and z4, and want to inverse all of them, * we compute u = 1/(z1*z2*z3*z4), and then we have: * 1/z1 = u*z2*z3*z4 * 1/z2 = u*z1*z3*z4 * 1/z3 = u*z1*z2*z4 * 1/z4 = u*z1*z2*z3 * * The partial products are computed recursively: * * - on input (z_1,z_2), return (z_2,z_1) and z_1*z_2 * - on input (z_1,z_2,... z_n): * recurse on (z_1,z_2,... z_(n/2)) -> r1 and m1 * recurse on (z_(n/2+1),z_(n/2+2)... z_n) -> r2 and m2 * multiply elements of r1 by m2 -> s1 * multiply elements of r2 by m1 -> s2 * return r1||r2 and m1*m2 * * In the example below, we suppose that we have 14 elements. * Let z1, z2,... zE be the 14 values to invert (index noted in * hexadecimal, starting at 1). * * - Depth 1: * swap(z1, z2); z12 = z1*z2 * swap(z3, z4); z34 = z3*z4 * swap(z5, z6); z56 = z5*z6 * swap(z7, z8); z78 = z7*z8 * swap(z9, zA); z9A = z9*zA * swap(zB, zC); zBC = zB*zC * swap(zD, zE); zDE = zD*zE * * - Depth 2: * z1 <- z1*z34, z2 <- z2*z34, z3 <- z3*z12, z4 <- z4*z12 * z1234 = z12*z34 * z5 <- z5*z78, z6 <- z6*z78, z7 <- z7*z56, z8 <- z8*z56 * z5678 = z56*z78 * z9 <- z9*zBC, zA <- zA*zBC, zB <- zB*z9A, zC <- zC*z9A * z9ABC = z9A*zBC * * - Depth 3: * z1 <- z1*z5678, z2 <- z2*z5678, z3 <- z3*z5678, z4 <- z4*z5678 * z5 <- z5*z1234, z6 <- z6*z1234, z7 <- z7*z1234, z8 <- z8*z1234 * z12345678 = z1234*z5678 * z9 <- z9*zDE, zA <- zA*zDE, zB <- zB*zDE, zC <- zC*zDE * zD <- zD*z9ABC, zE*z9ABC * z9ABCDE = z9ABC*zDE * * - Depth 4: * multiply z1..z8 by z9ABCDE * multiply z9..zE by z12345678 * final z = z12345678*z9ABCDE */ uint64_t z[16][4]; int i, k, s; #define zt (z[15]) #define zu (z[14]) #define zv (z[13]) /* * First recursion step (pairwise swapping and multiplication). * If there is an odd number of elements, then we "invent" an * extra one with coordinate Z = 1 (in Montgomery representation). */ for (i = 0; (i + 1) < num; i += 2) { memcpy(zt, jac[i].z, sizeof zt); memcpy(jac[i].z, jac[i + 1].z, sizeof zt); memcpy(jac[i + 1].z, zt, sizeof zt); _src_ec_ec_p256_m64_cf256_montymul(z[i >> 1], jac[i].z, jac[i + 1].z); } if ((num & 1) != 0) { memcpy(z[num >> 1], jac[num - 1].z, sizeof zt); memcpy(jac[num - 1].z, _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R, sizeof _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cF256_R); } /* * Perform further recursion steps. At the entry of each step, * the process has been done for groups of 's' points. The * integer k is the log2 of s. */ for (k = 1, s = 2; s < num; k ++, s <<= 1) { int n; for (i = 0; i < num; i ++) { _src_ec_ec_p256_m64_cf256_montymul(jac[i].z, jac[i].z, z[(i >> k) ^ 1]); } n = (num + s - 1) >> k; for (i = 0; i < (n >> 1); i ++) { _src_ec_ec_p256_m64_cf256_montymul(z[i], z[i << 1], z[(i << 1) + 1]); } if ((n & 1) != 0) { memmove(z[n >> 1], z[n], sizeof zt); } } /* * Invert the final result, and convert all points. */ _src_ec_ec_p256_m64_cf256_invert(zt, z[0]); for (i = 0; i < num; i ++) { _src_ec_ec_p256_m64_cf256_montymul(zv, jac[i].z, zt); _src_ec_ec_p256_m64_cf256_montysquare(zu, zv); _src_ec_ec_p256_m64_cf256_montymul(zv, zv, zu); _src_ec_ec_p256_m64_cf256_montymul(aff[i].x, jac[i].x, zu); _src_ec_ec_p256_m64_cf256_montymul(aff[i].y, jac[i].y, zv); } } /* * Multiply the provided point by an integer. * Assumptions: * - Source point is a valid curve point. * - Source point is not the point-at-infinity. * - Integer is not 0, and is lower than the curve order. * If these conditions are not met, then the result is indeterminate * (but the process is still constant-time). */ static void _src_ec_ec_p256_m64_cp256_mul(p256__src_ec_ec_p256_m64_cjacobian *P, const unsigned char *k, size_t klen) { union { _src_ec_ec_p256_m64_cp256_affine aff[15]; p256__src_ec_ec_p256_m64_cjacobian jac[15]; } window; int i; /* * Compute window, in Jacobian coordinates. */ window.jac[0] = *P; for (i = 2; i < 16; i ++) { window.jac[i - 1] = window.jac[(i >> 1) - 1]; if ((i & 1) == 0) { _src_ec_ec_p256_m64_cp256_double(&window.jac[i - 1]); } else { _src_ec_ec_p256_m64_cp256_add(&window.jac[i - 1], &window.jac[i >> 1]); } } /* * Convert the window points to affine coordinates. Point * window[0] is the source point, already in affine coordinates. */ _src_ec_ec_p256_m64_cwindow_to_affine(window.aff, window.jac, 15); /* * Perform point multiplication. */ _src_ec_ec_p256_m64_cpoint_mul_inner(P, window.aff, k, klen); } /* * Precomputed window for the conventional generator: _src_ec_ec_p256_m64_cP256__src_ec_ec_p256_m64_cGwin[n] * contains (n+1)*G (affine coordinates, in Montgomery representation). */ static const _src_ec_ec_p256_m64_cp256_affine _src_ec_ec_p256_m64_cP256__src_ec_ec_p256_m64_cGwin[] = { { { 0x79E730D418A9143C, 0x75BA95FC5FEDB601, 0x79FB732B77622510, 0x18905F76A53755C6 }, { 0xDDF25357CE95560A, 0x8B4AB8E4BA19E45C, 0xD2E88688DD21F325, 0x8571FF1825885D85 } }, { { 0x850046D410DDD64D, 0xAA6AE3C1A433827D, 0x732205038D1490D9, 0xF6BB32E43DCF3A3B }, { 0x2F3648D361BEE1A5, 0x152CD7CBEB236FF8, 0x19A8FB0E92042DBE, 0x78C577510A5B8A3B } }, { { 0xFFAC3F904EEBC127, 0xB027F84A087D81FB, 0x66AD77DD87CBBC98, 0x26936A3FB6FF747E }, { 0xB04C5C1FC983A7EB, 0x583E47AD0861FE1A, 0x788208311A2EE98E, 0xD5F06A29E587CC07 } }, { { 0x74B0B50D46918DCC, 0x4650A6EDC623C173, 0x0CDAACACE8100AF2, 0x577362F541B0176B }, { 0x2D96F24CE4CBABA6, 0x17628471FAD6F447, 0x6B6C36DEE5DDD22E, 0x84B14C394C5AB863 } }, { { 0xBE1B8AAEC45C61F5, 0x90EC649A94B9537D, 0x941CB5AAD076C20C, 0xC9079605890523C8 }, { 0xEB309B4AE7BA4F10, 0x73C568EFE5EB882B, 0x3540A9877E7A1F68, 0x73A076BB2DD1E916 } }, { { 0x403947373E77664A, 0x55AE744F346CEE3E, 0xD50A961A5B17A3AD, 0x13074B5954213673 }, { 0x93D36220D377E44B, 0x299C2B53ADFF14B5, 0xF424D44CEF639F11, 0xA4C9916D4A07F75F } }, { { 0x0746354EA0173B4F, 0x2BD20213D23C00F7, 0xF43EAAB50C23BB08, 0x13BA5119C3123E03 }, { 0x2847D0303F5B9D4D, 0x6742F2F25DA67BDD, 0xEF933BDC77C94195, 0xEAEDD9156E240867 } }, { { 0x27F14CD19499A78F, 0x462AB5C56F9B3455, 0x8F90F02AF02CFC6B, 0xB763891EB265230D }, { 0xF59DA3A9532D4977, 0x21E3327DCF9EBA15, 0x123C7B84BE60BBF0, 0x56EC12F27706DF76 } }, { { 0x75C96E8F264E20E8, 0xABE6BFED59A7A841, 0x2CC09C0444C8EB00, 0xE05B3080F0C4E16B }, { 0x1EB7777AA45F3314, 0x56AF7BEDCE5D45E3, 0x2B6E019A88B12F1A, 0x086659CDFD835F9B } }, { { 0x2C18DBD19DC21EC8, 0x98F9868A0FCF8139, 0x737D2CD648250B49, 0xCC61C94724B3428F }, { 0x0C2B407880DD9E76, 0xC43A8991383FBE08, 0x5F7D2D65779BE5D2, 0x78719A54EB3B4AB5 } }, { { 0xEA7D260A6245E404, 0x9DE407956E7FDFE0, 0x1FF3A4158DAC1AB5, 0x3E7090F1649C9073 }, { 0x1A7685612B944E88, 0x250F939EE57F61C8, 0x0C0DAA891EAD643D, 0x68930023E125B88E } }, { { 0x04B71AA7D2697768, 0xABDEDEF5CA345A33, 0x2409D29DEE37385E, 0x4EE1DF77CB83E156 }, { 0x0CAC12D91CBB5B43, 0x170ED2F6CA895637, 0x28228CFA8ADE6D66, 0x7FF57C9553238ACA } }, { { 0xCCC425634B2ED709, 0x0E356769856FD30D, 0xBCBCD43F559E9811, 0x738477AC5395B759 }, { 0x35752B90C00EE17F, 0x68748390742ED2E3, 0x7CD06422BD1F5BC1, 0xFBC08769C9E7B797 } }, { { 0xA242A35BB0CF664A, 0x126E48F77F9707E3, 0x1717BF54C6832660, 0xFAAE7332FD12C72E }, { 0x27B52DB7995D586B, 0xBE29569E832237C2, 0xE8E4193E2A65E7DB, 0x152706DC2EAA1BBB } }, { { 0x72BCD8B7BC60055B, 0x03CC23EE56E27E4B, 0xEE337424E4819370, 0xE2AA0E430AD3DA09 }, { 0x40B8524F6383C45D, 0xD766355442A41B25, 0x64EFA6DE778A4797, 0x2042170A7079ADF4 } } }; /* * Multiply the conventional generator of the curve by the provided * integer. Return is written in *P. * * Assumptions: * - Integer is not 0, and is lower than the curve order. * If this conditions is not met, then the result is indeterminate * (but the process is still constant-time). */ static void _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cp256_mulgen(p256__src_ec_ec_p256_m64_cjacobian *P, const unsigned char *k, size_t klen) { _src_ec_ec_p256_m64_cpoint_mul_inner(P, _src_ec_ec_p256_m64_cP256__src_ec_ec_p256_m64_cGwin, k, klen); } /* * Return 1 if all of the following hold: * - klen <= 32 * - k != 0 * - k is lower than the curve order * Otherwise, return 0. * * Constant-time behaviour: only klen may be observable. */ static uint32_t _src_ec_ec_p256_m64_ccheck_scalar(const unsigned char *k, size_t klen) { uint32_t z; int32_t c; size_t u; if (klen > 32) { return 0; } z = 0; for (u = 0; u < klen; u ++) { z |= k[u]; } if (klen == 32) { c = 0; for (u = 0; u < klen; u ++) { c |= -(int32_t)EQ0(c) & CMP(k[u], _src_ec_ec_p256_m64_cP256_N[u]); } } else { c = -1; } return NEQ(z, 0) & LT0(c); } static uint32_t _src_ec_ec_p256_m64_capi_mul(unsigned char *G, size_t Glen, const unsigned char *k, size_t klen, int curve) { uint32_t r; p256__src_ec_ec_p256_m64_cjacobian P; (void)curve; if (Glen != 65) { return 0; } r = _src_ec_ec_p256_m64_ccheck_scalar(k, klen); r &= _src_ec_ec_p256_m64_cpoint_decode(&P, G); _src_ec_ec_p256_m64_cp256_mul(&P, k, klen); r &= _src_ec_ec_p256_m64_cpoint_encode(G, &P); return r; } static size_t _src_ec_ec_p256_m64_capi_mulgen(unsigned char *R, const unsigned char *k, size_t klen, int curve) { p256__src_ec_ec_p256_m64_cjacobian P; (void)curve; _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cp256_mulgen(&P, k, klen); _src_ec_ec_p256_m64_cpoint_encode(R, &P); return 65; } static uint32_t _src_ec_ec_p256_m64_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { /* * We might want to use Shamir's trick here: make a composite * window of u*P+v*Q points, to merge the two doubling-ladders * into one. This, however, has some complications: * * - During the computation, we may hit the point-at-infinity. * Thus, we would need _src_ec_ec_p256_m64_cp256_add_complete_mixed() (complete * formulas for point addition), with a higher cost (17 muls * instead of 11). * * - A 4-bit window would be too large, since it would involve * 16*16-1 = 255 points. For the same window size as in the * _src_ec_ec_p256_m64_cp256_mul() case, we would need to reduce the window size * to 2 bits, and thus perform twice as many non-doubling * point additions. * * - The window may itself contain the point-at-infinity, and * thus cannot be in all generality be made of affine points. * Instead, we would need to make it a window of points in * Jacobian coordinates. Even _src_ec_ec_p256_m64_cp256_add_complete_mixed() would * be inappropriate. * * For these reasons, the code below performs two separate * point multiplications, then computes the final point addition * (which is both a "normal" addition, and a doubling, to handle * all cases). */ p256__src_ec_ec_p256_m64_cjacobian P, Q; uint32_t r, t, s; uint64_t z; (void)curve; if (len != 65) { return 0; } r = _src_ec_ec_p256_m64_cpoint_decode(&P, A); _src_ec_ec_p256_m64_cp256_mul(&P, x, xlen); if (B == NULL) { _src_ec_ec_p256_m64_c_src_ec_ec_p256_m64_cp256_mulgen(&Q, y, ylen); } else { r &= _src_ec_ec_p256_m64_cpoint_decode(&Q, B); _src_ec_ec_p256_m64_cp256_mul(&Q, y, ylen); } /* * The final addition may fail in case both points are equal. */ t = _src_ec_ec_p256_m64_cp256_add(&P, &Q); _src_ec_ec_p256_m64_cf256_final_reduce(P.z); z = P.z[0] | P.z[1] | P.z[2] | P.z[3]; s = EQ((uint32_t)(z | (z >> 32)), 0); _src_ec_ec_p256_m64_cp256_double(&Q); /* * If s is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * s = 0, t = 0 return P (normal addition) * s = 0, t = 1 return P (normal addition) * s = 1, t = 0 return Q (a 'double' case) * s = 1, t = 1 report an error (P+Q = 0) */ CCOPY(s & ~t, &P, &Q, sizeof Q); _src_ec_ec_p256_m64_cpoint_encode(A, &P); r &= ~(s & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_p256_m64 = { (uint32_t)0x00800000, &_src_ec_ec_p256_m64_capi_generator, &_src_ec_ec_p256_m64_capi_order, &_src_ec_ec_p256_m64_capi_xoff, &_src_ec_ec_p256_m64_capi_mul, &_src_ec_ec_p256_m64_capi_mulgen, &_src_ec_ec_p256_m64_capi_muladd }; /* see bearssl_ec.h */ const br_ec_impl * br_ec_p256_m64_get(void) { return &br_ec_p256_m64; } #else /* see bearssl_ec.h */ const br_ec_impl * br_ec_p256_m64_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Parameters for supported curves: * - field modulus p * - R^2 mod p (R = 2^(15k) for the smallest k such that R >= p) * - b*R mod p (b is the second curve equation parameter) */ static const uint16_t _src_ec_ec_prime_i15_cP256_P[] = { 0x0111, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x003F, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1000, 0x0000, 0x4000, 0x7FFF, 0x7FFF, 0x0001 }; static const uint16_t _src_ec_ec_prime_i15_cP256_R2[] = { 0x0111, 0x0000, 0x6000, 0x0000, 0x0000, 0x0000, 0x0000, 0x7FFC, 0x7FFF, 0x7FBF, 0x7FFF, 0x7FBF, 0x7FFF, 0x7FFF, 0x7FFF, 0x77FF, 0x7FFF, 0x4FFF, 0x0000 }; static const uint16_t _src_ec_ec_prime_i15_cP256_B[] = { 0x0111, 0x770C, 0x5EEF, 0x29C4, 0x3EC4, 0x6273, 0x0486, 0x4543, 0x3993, 0x3C01, 0x6B56, 0x212E, 0x57EE, 0x4882, 0x204B, 0x7483, 0x3C16, 0x0187, 0x0000 }; static const uint16_t _src_ec_ec_prime_i15_cP384_P[] = { 0x0199, 0x7FFF, 0x7FFF, 0x0003, 0x0000, 0x0000, 0x0000, 0x7FC0, 0x7FFF, 0x7EFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x01FF }; static const uint16_t _src_ec_ec_prime_i15_cP384_R2[] = { 0x0199, 0x1000, 0x0000, 0x0000, 0x7FFF, 0x7FFF, 0x0001, 0x0000, 0x0010, 0x0000, 0x0000, 0x0000, 0x7F00, 0x7FFF, 0x01FF, 0x0000, 0x1000, 0x0000, 0x2000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; static const uint16_t _src_ec_ec_prime_i15_cP384_B[] = { 0x0199, 0x7333, 0x2096, 0x70D1, 0x2310, 0x3020, 0x6197, 0x1464, 0x35BB, 0x70CA, 0x0117, 0x1920, 0x4136, 0x5FC8, 0x5713, 0x4938, 0x7DD2, 0x4DD2, 0x4A71, 0x0220, 0x683E, 0x2C87, 0x4DB1, 0x7BFF, 0x6C09, 0x0452, 0x0084 }; static const uint16_t _src_ec_ec_prime_i15_cP521_P[] = { 0x022B, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x07FF }; static const uint16_t _src_ec_ec_prime_i15_cP521_R2[] = { 0x022B, 0x0100, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; static const uint16_t _src_ec_ec_prime_i15_cP521_B[] = { 0x022B, 0x7002, 0x6A07, 0x751A, 0x228F, 0x71EF, 0x5869, 0x20F4, 0x1EFC, 0x7357, 0x37E0, 0x4EEC, 0x605E, 0x1652, 0x26F6, 0x31FA, 0x4A8F, 0x6193, 0x3C2A, 0x3C42, 0x48C7, 0x3489, 0x6771, 0x4C57, 0x5CCD, 0x2725, 0x545B, 0x503B, 0x5B42, 0x21A0, 0x2534, 0x687E, 0x70E4, 0x1618, 0x27D7, 0x0465 }; typedef struct { const uint16_t *p; const uint16_t *b; const uint16_t *R2; uint16_t p0i; size_t point_len; } _src_ec_ec_prime_i15_ccurve_params; static inline const _src_ec_ec_prime_i15_ccurve_params * _src_ec_ec_prime_i15_cid_to_curve(int curve) { static const _src_ec_ec_prime_i15_ccurve_params pp[] = { { _src_ec_ec_prime_i15_cP256_P, _src_ec_ec_prime_i15_cP256_B, _src_ec_ec_prime_i15_cP256_R2, 0x0001, 65 }, { _src_ec_ec_prime_i15_cP384_P, _src_ec_ec_prime_i15_cP384_B, _src_ec_ec_prime_i15_cP384_R2, 0x0001, 97 }, { _src_ec_ec_prime_i15_cP521_P, _src_ec_ec_prime_i15_cP521_B, _src_ec_ec_prime_i15_cP521_R2, 0x0001, 133 } }; return &pp[curve - BR_EC_secp256r1]; } #define I15_LEN ((BR_MAX_EC_SIZE + 29) / 15) /* * Type for a point in Jacobian coordinates: * -- three values, x, y and z, in Montgomery representation * -- affine coordinates are X = x / z^2 and Y = y / z^3 * -- for the point at infinity, z = 0 */ typedef struct { uint16_t c[3][I15_LEN]; } _src_ec_ec_prime_i15_cjacobian; /* * We use a custom interpreter that uses a dozen registers, and * only six operations: * MSET(d, a) copy a into d * MADD(d, a) d = d+a (modular) * MSUB(d, a) d = d-a (modular) * _src_ec_ec_prime_i15_cMMUL(d, a, b) d = a*b (Montgomery multiplication) * MINV(d, a, b) invert d modulo p; a and b are used as scratch registers * MTZ(d) clear return value if d = 0 * Destination of _src_ec_ec_prime_i15_cMMUL (d) must be distinct from operands (a and b). * There is no such constraint for MSUB and MADD. * * Registers include the operand coordinates, and temporaries. */ #define MSET(d, a) (0x0000 + ((d) << 8) + ((a) << 4)) #define MADD(d, a) (0x1000 + ((d) << 8) + ((a) << 4)) #define MSUB(d, a) (0x2000 + ((d) << 8) + ((a) << 4)) #define _src_ec_ec_prime_i15_cMMUL(d, a, b) (0x3000 + ((d) << 8) + ((a) << 4) + (b)) #define MINV(d, a, b) (0x4000 + ((d) << 8) + ((a) << 4) + (b)) #define MTZ(d) (0x5000 + ((d) << 8)) #define ENDCODE 0 /* * Registers for the input operands. */ #define _src_ec_ec_prime_i15_cP1x 0 #define _src_ec_ec_prime_i15_cP1y 1 #define _src_ec_ec_prime_i15_cP1z 2 #define _src_ec_ec_prime_i15_cP2x 3 #define _src_ec_ec_prime_i15_cP2y 4 #define _src_ec_ec_prime_i15_cP2z 5 /* * Alternate names for the first input operand. */ #define _src_ec_ec_prime_i15_cPx 0 #define _src_ec_ec_prime_i15_cPy 1 #define _src_ec_ec_prime_i15_cPz 2 /* * Temporaries. */ #define _src_ec_ec_prime_i15_ct1 6 #define _src_ec_ec_prime_i15_ct2 7 #define _src_ec_ec_prime_i15_ct3 8 #define _src_ec_ec_prime_i15_ct4 9 #define _src_ec_ec_prime_i15_ct5 10 #define _src_ec_ec_prime_i15_ct6 11 #define _src_ec_ec_prime_i15_ct7 12 /* * Extra scratch registers available when there is no second operand (e.g. * for "double" and "affine"). */ #define _src_ec_ec_prime_i15_ct8 3 #define _src_ec_ec_prime_i15_ct9 4 #define _src_ec_ec_prime_i15_ct10 5 /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * If y = 0 (P has order 2) then this yields infinity (z' = 0), as it * should. This case should not happen anyway, because our curves have * prime order, and thus do not contain any point of order 2. * * If P is infinity (z = 0), then again the formulas yield infinity, * which is correct. Thus, this code works for all points. * * Cost: 8 multiplications */ static const uint16_t _src_ec_ec_prime_i15_ccode_double[] = { /* * Compute z^2 (in t1). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cPz, _src_ec_ec_prime_i15_cPz), /* * Compute x-z^2 (in t2) and then x+z^2 (in t1). */ MSET(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cPx), MSUB(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct1), MADD(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cPx), /* * Compute m = 3*(x+z^2)*(x-z^2) (in t1). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct2), MSET(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct3), MADD(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct3), MADD(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct3), /* * Compute s = 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cPy, _src_ec_ec_prime_i15_cPy), MADD(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_ct3), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cPx, _src_ec_ec_prime_i15_ct3), MADD(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct2), /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cPx, _src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct1), MSUB(_src_ec_ec_prime_i15_cPx, _src_ec_ec_prime_i15_ct2), MSUB(_src_ec_ec_prime_i15_cPx, _src_ec_ec_prime_i15_ct2), /* * Compute z' = 2*y*z. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_cPy, _src_ec_ec_prime_i15_cPz), MSET(_src_ec_ec_prime_i15_cPz, _src_ec_ec_prime_i15_ct4), MADD(_src_ec_ec_prime_i15_cPz, _src_ec_ec_prime_i15_ct4), /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ MSUB(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cPx), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cPy, _src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct2), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_ct3), MSUB(_src_ec_ec_prime_i15_cPy, _src_ec_ec_prime_i15_ct4), MSUB(_src_ec_ec_prime_i15_cPy, _src_ec_ec_prime_i15_ct4), ENDCODE }; /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 * * If both P1 and P2 are infinity, then z1 == 0 and z2 == 0, implying that * z3 == 0, so the result is correct. * If either of P1 or P2 is infinity, but not both, then z3 == 0, which is * not correct. * h == 0 only if u1 == u2; this happens in two cases: * -- if s1 == s2 then P1 and/or P2 is infinity, or P1 == P2 * -- if s1 != s2 then P1 + P2 == infinity (but neither P1 or P2 is infinity) * * Thus, the following situations are not handled correctly: * -- P1 = 0 and P2 != 0 * -- P1 != 0 and P2 = 0 * -- P1 = P2 * All other cases are properly computed. However, even in "incorrect" * situations, the three coordinates still are properly formed field * elements. * * The returned flag is cleared if r == 0. This happens in the following * cases: * -- Both points are on the same horizontal line (same Y coordinate). * -- Both points are infinity. * -- One point is infinity and the other is on line Y = 0. * The third case cannot happen with our curves (there is no valid point * on line Y = 0 since that would be a point of order 2). If the two * source points are non-infinity, then remains only the case where the * two points are on the same horizontal line. * * This allows us to detect the "P1 == P2" case, assuming that P1 != 0 and * P2 != 0: * -- If the returned value is not the point at infinity, then it was properly * computed. * -- Otherwise, if the returned flag is 1, then P1+P2 = 0, and the result * is indeed the point at infinity. * -- Otherwise (result is infinity, flag is 0), then P1 = P2 and we should * use the 'double' code. * * Cost: 16 multiplications */ static const uint16_t _src_ec_ec_prime_i15_ccode_add[] = { /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cP2z, _src_ec_ec_prime_i15_cP2z), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct3), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_cP2z, _src_ec_ec_prime_i15_ct3), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_ct4), /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_cP1z), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP2x, _src_ec_ec_prime_i15_ct4), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct5, _src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_ct4), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_cP2y, _src_ec_ec_prime_i15_ct5), /* * Compute h = u2 - u1 (in t2) and r = s2 - s1 (in t4). */ MSUB( _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct1), MSUB( _src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_ct3), /* * Report cases where r = 0 through the returned flag. */ MTZ( _src_ec_ec_prime_i15_ct4), /* * Compute u1*h^2 (in t6) and h^3 (in t5). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct7, _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct2), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct6, _src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct7), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct5, _src_ec_ec_prime_i15_ct7, _src_ec_ec_prime_i15_ct2), /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. * t1 and t7 can be used as scratch registers. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_ct4), MSUB( _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct5), MSUB( _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct6), MSUB( _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct6), /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ MSUB(_src_ec_ec_prime_i15_ct6, _src_ec_ec_prime_i15_cP1x), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_ct4, _src_ec_ec_prime_i15_ct6), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct5, _src_ec_ec_prime_i15_ct3), MSUB(_src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_ct1), /* * Compute z3 = h*z1*z2. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_cP2z), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct2), ENDCODE }; /* * Check that the point is on the curve. This code snippet assumes the * following conventions: * -- Coordinates x and y have been freshly decoded in P1 (but not * converted to Montgomery coordinates yet). * -- P2x, P2y and P2z are set to, respectively, R^2, b*R and 1. */ static const uint16_t _src_ec_ec_prime_i15_ccode_check[] = { /* Convert x and y to Montgomery representation. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_cP2x), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_cP2x), MSET(_src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct1), MSET(_src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_ct2), /* Compute x^3 in t1. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_cP1x), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct2), /* Subtract 3*x from t1. */ MSUB(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x), MSUB(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x), MSUB(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1x), /* Add b. */ MADD(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP2y), /* Compute y^2 in t2. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_cP1y), /* Compare y^2 with x^3 - 3*x + b; they must match. */ MSUB(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_ct2), MTZ(_src_ec_ec_prime_i15_ct1), /* Set z to 1 (in Montgomery representation). */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_cP2x, _src_ec_ec_prime_i15_cP2z), ENDCODE }; /* * Conversion back to affine coordinates. This code snippet assumes that * the z coordinate of P2 is set to 1 (not in Montgomery representation). */ static const uint16_t _src_ec_ec_prime_i15_ccode_affine[] = { /* Save z*R in t1. */ MSET(_src_ec_ec_prime_i15_ct1, _src_ec_ec_prime_i15_cP1z), /* Compute z^3 in t2. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_cP1z), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cP1z, _src_ec_ec_prime_i15_ct2), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cP2z), /* Invert to (1/z^3) in t2. */ MINV(_src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_ct4), /* Compute y. */ MSET(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_cP1y), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1y, _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct3), /* Compute (1/z^2) in t3. */ _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_ct3, _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct1), /* Compute x. */ MSET( _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_cP1x), _src_ec_ec_prime_i15_cMMUL(_src_ec_ec_prime_i15_cP1x, _src_ec_ec_prime_i15_ct2, _src_ec_ec_prime_i15_ct3), ENDCODE }; static uint32_t _src_ec_ec_prime_i15_crun_code(_src_ec_ec_prime_i15_cjacobian *P1, const _src_ec_ec_prime_i15_cjacobian *P2, const _src_ec_ec_prime_i15_ccurve_params *cc, const uint16_t *code) { uint32_t r; uint16_t t[13][I15_LEN]; size_t u; r = 1; /* * Copy the two operands in the dedicated registers. */ memcpy(t[_src_ec_ec_prime_i15_cP1x], P1->c, 3 * I15_LEN * sizeof(uint16_t)); memcpy(t[_src_ec_ec_prime_i15_cP2x], P2->c, 3 * I15_LEN * sizeof(uint16_t)); /* * Run formulas. */ for (u = 0;; u ++) { unsigned op, d, a, b; op = code[u]; if (op == 0) { break; } d = (op >> 8) & 0x0F; a = (op >> 4) & 0x0F; b = op & 0x0F; op >>= 12; switch (op) { uint32_t ctl; size_t plen; unsigned char tp[(BR_MAX_EC_SIZE + 7) >> 3]; case 0: memcpy(t[d], t[a], I15_LEN * sizeof(uint16_t)); break; case 1: ctl = br_i15_add(t[d], t[a], 1); ctl |= NOT(br_i15_sub(t[d], cc->p, 0)); br_i15_sub(t[d], cc->p, ctl); break; case 2: br_i15_add(t[d], cc->p, br_i15_sub(t[d], t[a], 1)); break; case 3: br_i15_montymul(t[d], t[a], t[b], cc->p, cc->p0i); break; case 4: plen = (cc->p[0] - (cc->p[0] >> 4) + 7) >> 3; br_i15_encode(tp, plen, cc->p); tp[plen - 1] -= 2; br_i15_modpow(t[d], tp, plen, cc->p, cc->p0i, t[a], t[b]); break; default: r &= ~br_i15_iszero(t[d]); break; } } /* * Copy back result. */ memcpy(P1->c, t[_src_ec_ec_prime_i15_cP1x], 3 * I15_LEN * sizeof(uint16_t)); return r; } static void _src_ec_ec_prime_i15_cset_one(uint16_t *x, const uint16_t *p) { size_t plen; plen = (p[0] + 31) >> 4; memset(x, 0, plen * sizeof *x); x[0] = p[0]; x[1] = 0x0001; } static void _src_ec_ec_prime_i15_cpoint_zero(_src_ec_ec_prime_i15_cjacobian *P, const _src_ec_ec_prime_i15_ccurve_params *cc) { memset(P, 0, sizeof *P); P->c[0][0] = P->c[1][0] = P->c[2][0] = cc->p[0]; } static inline void _src_ec_ec_prime_i15_cpoint_double(_src_ec_ec_prime_i15_cjacobian *P, const _src_ec_ec_prime_i15_ccurve_params *cc) { _src_ec_ec_prime_i15_crun_code(P, P, cc, _src_ec_ec_prime_i15_ccode_double); } static inline uint32_t _src_ec_ec_prime_i15_cpoint_add(_src_ec_ec_prime_i15_cjacobian *P1, const _src_ec_ec_prime_i15_cjacobian *P2, const _src_ec_ec_prime_i15_ccurve_params *cc) { return _src_ec_ec_prime_i15_crun_code(P1, P2, cc, _src_ec_ec_prime_i15_ccode_add); } static void _src_ec_ec_prime_i15_cpoint_mul(_src_ec_ec_prime_i15_cjacobian *P, const unsigned char *x, size_t xlen, const _src_ec_ec_prime_i15_ccurve_params *cc) { /* * We do a simple double-and-add ladder with a 2-bit window * to make only one add every two doublings. We thus first * precompute 2P and 3P in some local buffers. * * We always perform two doublings and one addition; the * addition is with P, 2P and 3P and is done in a temporary * array. * * The addition code cannot handle cases where one of the * operands is infinity, which is the case at the start of the * ladder. We therefore need to maintain a flag that controls * this situation. */ uint32_t qz; _src_ec_ec_prime_i15_cjacobian P2, P3, Q, T, U; memcpy(&P2, P, sizeof P2); _src_ec_ec_prime_i15_cpoint_double(&P2, cc); memcpy(&P3, P, sizeof P3); _src_ec_ec_prime_i15_cpoint_add(&P3, &P2, cc); _src_ec_ec_prime_i15_cpoint_zero(&Q, cc); qz = 1; while (xlen -- > 0) { int k; for (k = 6; k >= 0; k -= 2) { uint32_t bits; uint32_t bnz; _src_ec_ec_prime_i15_cpoint_double(&Q, cc); _src_ec_ec_prime_i15_cpoint_double(&Q, cc); memcpy(&T, P, sizeof T); memcpy(&U, &Q, sizeof U); bits = (*x >> k) & (uint32_t)3; bnz = NEQ(bits, 0); CCOPY(EQ(bits, 2), &T, &P2, sizeof T); CCOPY(EQ(bits, 3), &T, &P3, sizeof T); _src_ec_ec_prime_i15_cpoint_add(&U, &T, cc); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; } x ++; } memcpy(P, &Q, sizeof Q); } /* * Decode point into Jacobian coordinates. This function does not support * the point at infinity. If the point is invalid then this returns 0, but * the coordinates are still set to properly formed field elements. */ static uint32_t _src_ec_ec_prime_i15_cpoint_decode(_src_ec_ec_prime_i15_cjacobian *P, const void *src, size_t len, const _src_ec_ec_prime_i15_ccurve_params *cc) { /* * Points must use uncompressed format: * -- first byte is 0x04; * -- coordinates X and Y use unsigned big-endian, with the same * length as the field modulus. * * We don't support hybrid format (uncompressed, but first byte * has value 0x06 or 0x07, depending on the least significant bit * of Y) because it is rather useless, and explicitly forbidden * by PKIX (RFC 5480, section 2.2). * * We don't support compressed format either, because it is not * much used in practice (there are or were patent-related * concerns about point compression, which explains the lack of * generalised support). Also, point compression support would * need a bit more code. */ const unsigned char *buf; size_t plen, zlen; uint32_t r; _src_ec_ec_prime_i15_cjacobian Q; buf = (const unsigned char*)src; _src_ec_ec_prime_i15_cpoint_zero(P, cc); plen = (cc->p[0] - (cc->p[0] >> 4) + 7) >> 3; if (len != 1 + (plen << 1)) { return 0; } r = br_i15_decode_mod(P->c[0], buf + 1, plen, cc->p); r &= br_i15_decode_mod(P->c[1], buf + 1 + plen, plen, cc->p); /* * Check first byte. */ r &= EQ(buf[0], 0x04); /* obsolete r &= EQ(buf[0], 0x04) | (EQ(buf[0] & 0xFE, 0x06) & ~(uint32_t)(buf[0] ^ buf[plen << 1])); */ /* * Convert coordinates and check that the point is valid. */ zlen = ((cc->p[0] + 31) >> 4) * sizeof(uint16_t); memcpy(Q.c[0], cc->R2, zlen); memcpy(Q.c[1], cc->b, zlen); _src_ec_ec_prime_i15_cset_one(Q.c[2], cc->p); r &= ~_src_ec_ec_prime_i15_crun_code(P, &Q, cc, _src_ec_ec_prime_i15_ccode_check); return r; } /* * Encode a point. This method assumes that the point is correct and is * not the point at infinity. Encoded size is always 1+2*plen, where * plen is the field modulus length, in bytes. */ static void _src_ec_ec_prime_i15_cpoint_encode(void *dst, const _src_ec_ec_prime_i15_cjacobian *P, const _src_ec_ec_prime_i15_ccurve_params *cc) { unsigned char *buf; size_t plen; _src_ec_ec_prime_i15_cjacobian Q, T; buf = (unsigned char*)dst; plen = (cc->p[0] - (cc->p[0] >> 4) + 7) >> 3; buf[0] = 0x04; memcpy(&Q, P, sizeof *P); _src_ec_ec_prime_i15_cset_one(T.c[2], cc->p); _src_ec_ec_prime_i15_crun_code(&Q, &T, cc, _src_ec_ec_prime_i15_ccode_affine); br_i15_encode(buf + 1, plen, Q.c[0]); br_i15_encode(buf + 1 + plen, plen, Q.c[1]); } static const br_ec_curve_def * _src_ec_ec_prime_i15_cid_to_curve_def(int curve) { switch (curve) { case BR_EC_secp256r1: return &br_secp256r1; case BR_EC_secp384r1: return &br_secp384r1; case BR_EC_secp521r1: return &br_secp521r1; } return NULL; } static const unsigned char * _src_ec_ec_prime_i15_capi_generator(int curve, size_t *len) { const br_ec_curve_def *cd; cd = _src_ec_ec_prime_i15_cid_to_curve_def(curve); *len = cd->generator_len; return cd->generator; } static const unsigned char * _src_ec_ec_prime_i15_capi_order(int curve, size_t *len) { const br_ec_curve_def *cd; cd = _src_ec_ec_prime_i15_cid_to_curve_def(curve); *len = cd->order_len; return cd->order; } static size_t _src_ec_ec_prime_i15_capi_xoff(int curve, size_t *len) { _src_ec_ec_prime_i15_capi_generator(curve, len); *len >>= 1; return 1; } static uint32_t _src_ec_ec_prime_i15_capi_mul(unsigned char *G, size_t Glen, const unsigned char *x, size_t xlen, int curve) { uint32_t r; const _src_ec_ec_prime_i15_ccurve_params *cc; _src_ec_ec_prime_i15_cjacobian P; cc = _src_ec_ec_prime_i15_cid_to_curve(curve); if (Glen != cc->point_len) { return 0; } r = _src_ec_ec_prime_i15_cpoint_decode(&P, G, Glen, cc); _src_ec_ec_prime_i15_cpoint_mul(&P, x, xlen, cc); _src_ec_ec_prime_i15_cpoint_encode(G, &P, cc); return r; } static size_t _src_ec_ec_prime_i15_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_prime_i15_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_prime_i15_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_prime_i15_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { uint32_t r, t, z; const _src_ec_ec_prime_i15_ccurve_params *cc; _src_ec_ec_prime_i15_cjacobian P, Q; /* * TODO: see about merging the two ladders. Right now, we do * two independent point multiplications, which is a bit * wasteful of CPU resources (but yields short code). */ cc = _src_ec_ec_prime_i15_cid_to_curve(curve); if (len != cc->point_len) { return 0; } r = _src_ec_ec_prime_i15_cpoint_decode(&P, A, len, cc); if (B == NULL) { size_t Glen; B = _src_ec_ec_prime_i15_capi_generator(curve, &Glen); } r &= _src_ec_ec_prime_i15_cpoint_decode(&Q, B, len, cc); _src_ec_ec_prime_i15_cpoint_mul(&P, x, xlen, cc); _src_ec_ec_prime_i15_cpoint_mul(&Q, y, ylen, cc); /* * We want to compute P+Q. Since the base points A and B are distinct * from infinity, and the multipliers are non-zero and lower than the * curve order, then we know that P and Q are non-infinity. This * leaves two special situations to test for: * -- If P = Q then we must use _src_ec_ec_prime_i15_cpoint_double(). * -- If P+Q = 0 then we must report an error. */ t = _src_ec_ec_prime_i15_cpoint_add(&P, &Q, cc); _src_ec_ec_prime_i15_cpoint_double(&Q, cc); z = br_i15_iszero(P.c[2]); /* * If z is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * z = 0, t = 0 return P (normal addition) * z = 0, t = 1 return P (normal addition) * z = 1, t = 0 return Q (a 'double' case) * z = 1, t = 1 report an error (P+Q = 0) */ CCOPY(z & ~t, &P, &Q, sizeof Q); _src_ec_ec_prime_i15_cpoint_encode(A, &P, cc); r &= ~(z & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_prime_i15 = { (uint32_t)0x03800000, &_src_ec_ec_prime_i15_capi_generator, &_src_ec_ec_prime_i15_capi_order, &_src_ec_ec_prime_i15_capi_xoff, &_src_ec_ec_prime_i15_capi_mul, &_src_ec_ec_prime_i15_capi_mulgen, &_src_ec_ec_prime_i15_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Parameters for supported curves (field modulus, and 'b' equation * parameter; both values use the 'i31' format, and 'b' is in Montgomery * representation). */ static const uint32_t _src_ec_ec_prime_i31_cP256_P[] = { 0x00000108, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x00000007, 0x00000000, 0x00000000, 0x00000040, 0x7FFFFF80, 0x000000FF }; static const uint32_t _src_ec_ec_prime_i31_cP256_R2[] = { 0x00000108, 0x00014000, 0x00018000, 0x00000000, 0x7FF40000, 0x7FEFFFFF, 0x7FF7FFFF, 0x7FAFFFFF, 0x005FFFFF, 0x00000000 }; static const uint32_t _src_ec_ec_prime_i31_cP256_B[] = { 0x00000108, 0x6FEE1803, 0x6229C4BD, 0x21B139BE, 0x327150AA, 0x3567802E, 0x3F7212ED, 0x012E4355, 0x782DD38D, 0x0000000E }; static const uint32_t _src_ec_ec_prime_i31_cP384_P[] = { 0x0000018C, 0x7FFFFFFF, 0x00000001, 0x00000000, 0x7FFFFFF8, 0x7FFFFFEF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x00000FFF }; static const uint32_t _src_ec_ec_prime_i31_cP384_R2[] = { 0x0000018C, 0x00000000, 0x00000080, 0x7FFFFE00, 0x000001FF, 0x00000800, 0x00000000, 0x7FFFE000, 0x00001FFF, 0x00008000, 0x00008000, 0x00000000, 0x00000000, 0x00000000 }; static const uint32_t _src_ec_ec_prime_i31_cP384_B[] = { 0x0000018C, 0x6E666840, 0x070D0392, 0x5D810231, 0x7651D50C, 0x17E218D6, 0x1B192002, 0x44EFE441, 0x3A524E2B, 0x2719BA5F, 0x41F02209, 0x36C5643E, 0x5813EFFE, 0x000008A5 }; static const uint32_t _src_ec_ec_prime_i31_cP521_P[] = { 0x00000219, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x01FFFFFF }; static const uint32_t _src_ec_ec_prime_i31_cP521_R2[] = { 0x00000219, 0x00001000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }; static const uint32_t _src_ec_ec_prime_i31_cP521_B[] = { 0x00000219, 0x540FC00A, 0x228FEA35, 0x2C34F1EF, 0x67BF107A, 0x46FC1CD5, 0x1605E9DD, 0x6937B165, 0x272A3D8F, 0x42785586, 0x44C8C778, 0x15F3B8B4, 0x64B73366, 0x03BA8B69, 0x0D05B42A, 0x21F929A2, 0x2C31C393, 0x00654FAE }; typedef struct { const uint32_t *p; const uint32_t *b; const uint32_t *R2; uint32_t p0i; size_t point_len; } _src_ec_ec_prime_i31_ccurve_params; static inline const _src_ec_ec_prime_i31_ccurve_params * _src_ec_ec_prime_i31_cid_to_curve(int curve) { static const _src_ec_ec_prime_i31_ccurve_params pp[] = { { _src_ec_ec_prime_i31_cP256_P, _src_ec_ec_prime_i31_cP256_B, _src_ec_ec_prime_i31_cP256_R2, 0x00000001, 65 }, { _src_ec_ec_prime_i31_cP384_P, _src_ec_ec_prime_i31_cP384_B, _src_ec_ec_prime_i31_cP384_R2, 0x00000001, 97 }, { _src_ec_ec_prime_i31_cP521_P, _src_ec_ec_prime_i31_cP521_B, _src_ec_ec_prime_i31_cP521_R2, 0x00000001, 133 } }; return &pp[curve - BR_EC_secp256r1]; } #define I31_LEN ((BR_MAX_EC_SIZE + 61) / 31) /* * Type for a point in Jacobian coordinates: * -- three values, x, y and z, in Montgomery representation * -- affine coordinates are X = x / z^2 and Y = y / z^3 * -- for the point at infinity, z = 0 */ typedef struct { uint32_t c[3][I31_LEN]; } _src_ec_ec_prime_i31_cjacobian; /* * We use a custom interpreter that uses a dozen registers, and * only six operations: * MSET(d, a) copy a into d * MADD(d, a) d = d+a (modular) * MSUB(d, a) d = d-a (modular) * _src_ec_ec_prime_i31_cMMUL(d, a, b) d = a*b (Montgomery multiplication) * MINV(d, a, b) invert d modulo p; a and b are used as scratch registers * MTZ(d) clear return value if d = 0 * Destination of _src_ec_ec_prime_i31_cMMUL (d) must be distinct from operands (a and b). * There is no such constraint for MSUB and MADD. * * Registers include the operand coordinates, and temporaries. */ #define MSET(d, a) (0x0000 + ((d) << 8) + ((a) << 4)) #define MADD(d, a) (0x1000 + ((d) << 8) + ((a) << 4)) #define MSUB(d, a) (0x2000 + ((d) << 8) + ((a) << 4)) #define _src_ec_ec_prime_i31_cMMUL(d, a, b) (0x3000 + ((d) << 8) + ((a) << 4) + (b)) #define MINV(d, a, b) (0x4000 + ((d) << 8) + ((a) << 4) + (b)) #define MTZ(d) (0x5000 + ((d) << 8)) #define ENDCODE 0 /* * Registers for the input operands. */ #define _src_ec_ec_prime_i31_cP1x 0 #define _src_ec_ec_prime_i31_cP1y 1 #define _src_ec_ec_prime_i31_cP1z 2 #define _src_ec_ec_prime_i31_cP2x 3 #define _src_ec_ec_prime_i31_cP2y 4 #define _src_ec_ec_prime_i31_cP2z 5 /* * Alternate names for the first input operand. */ #define _src_ec_ec_prime_i31_cPx 0 #define _src_ec_ec_prime_i31_cPy 1 #define _src_ec_ec_prime_i31_cPz 2 /* * Temporaries. */ #define _src_ec_ec_prime_i31_ct1 6 #define _src_ec_ec_prime_i31_ct2 7 #define _src_ec_ec_prime_i31_ct3 8 #define _src_ec_ec_prime_i31_ct4 9 #define _src_ec_ec_prime_i31_ct5 10 #define _src_ec_ec_prime_i31_ct6 11 #define _src_ec_ec_prime_i31_ct7 12 /* * Extra scratch registers available when there is no second operand (e.g. * for "double" and "affine"). */ #define _src_ec_ec_prime_i31_ct8 3 #define _src_ec_ec_prime_i31_ct9 4 #define _src_ec_ec_prime_i31_ct10 5 /* * Doubling formulas are: * * s = 4*x*y^2 * m = 3*(x + z^2)*(x - z^2) * x' = m^2 - 2*s * y' = m*(s - x') - 8*y^4 * z' = 2*y*z * * If y = 0 (P has order 2) then this yields infinity (z' = 0), as it * should. This case should not happen anyway, because our curves have * prime order, and thus do not contain any point of order 2. * * If P is infinity (z = 0), then again the formulas yield infinity, * which is correct. Thus, this code works for all points. * * Cost: 8 multiplications */ static const uint16_t _src_ec_ec_prime_i31_ccode_double[] = { /* * Compute z^2 (in t1). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cPz, _src_ec_ec_prime_i31_cPz), /* * Compute x-z^2 (in t2) and then x+z^2 (in t1). */ MSET(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cPx), MSUB(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct1), MADD(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cPx), /* * Compute m = 3*(x+z^2)*(x-z^2) (in t1). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct2), MSET(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct3), MADD(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct3), MADD(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct3), /* * Compute s = 4*x*y^2 (in t2) and 2*y^2 (in t3). */ _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cPy, _src_ec_ec_prime_i31_cPy), MADD( _src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_ct3), _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cPx, _src_ec_ec_prime_i31_ct3), MADD( _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct2), /* * Compute x' = m^2 - 2*s. */ _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_cPx, _src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct1), MSUB( _src_ec_ec_prime_i31_cPx, _src_ec_ec_prime_i31_ct2), MSUB( _src_ec_ec_prime_i31_cPx, _src_ec_ec_prime_i31_ct2), /* * Compute z' = 2*y*z. */ _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_cPy, _src_ec_ec_prime_i31_cPz), MSET( _src_ec_ec_prime_i31_cPz, _src_ec_ec_prime_i31_ct4), MADD( _src_ec_ec_prime_i31_cPz, _src_ec_ec_prime_i31_ct4), /* * Compute y' = m*(s - x') - 8*y^4. Note that we already have * 2*y^2 in t3. */ MSUB( _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cPx), _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_cPy, _src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct2), _src_ec_ec_prime_i31_cMMUL( _src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_ct3), MSUB( _src_ec_ec_prime_i31_cPy, _src_ec_ec_prime_i31_ct4), MSUB( _src_ec_ec_prime_i31_cPy, _src_ec_ec_prime_i31_ct4), ENDCODE }; /* * Addtions formulas are: * * u1 = x1 * z2^2 * u2 = x2 * z1^2 * s1 = y1 * z2^3 * s2 = y2 * z1^3 * h = u2 - u1 * r = s2 - s1 * x3 = r^2 - h^3 - 2 * u1 * h^2 * y3 = r * (u1 * h^2 - x3) - s1 * h^3 * z3 = h * z1 * z2 * * If both P1 and P2 are infinity, then z1 == 0 and z2 == 0, implying that * z3 == 0, so the result is correct. * If either of P1 or P2 is infinity, but not both, then z3 == 0, which is * not correct. * h == 0 only if u1 == u2; this happens in two cases: * -- if s1 == s2 then P1 and/or P2 is infinity, or P1 == P2 * -- if s1 != s2 then P1 + P2 == infinity (but neither P1 or P2 is infinity) * * Thus, the following situations are not handled correctly: * -- P1 = 0 and P2 != 0 * -- P1 != 0 and P2 = 0 * -- P1 = P2 * All other cases are properly computed. However, even in "incorrect" * situations, the three coordinates still are properly formed field * elements. * * The returned flag is cleared if r == 0. This happens in the following * cases: * -- Both points are on the same horizontal line (same Y coordinate). * -- Both points are infinity. * -- One point is infinity and the other is on line Y = 0. * The third case cannot happen with our curves (there is no valid point * on line Y = 0 since that would be a point of order 2). If the two * source points are non-infinity, then remains only the case where the * two points are on the same horizontal line. * * This allows us to detect the "P1 == P2" case, assuming that P1 != 0 and * P2 != 0: * -- If the returned value is not the point at infinity, then it was properly * computed. * -- Otherwise, if the returned flag is 1, then P1+P2 = 0, and the result * is indeed the point at infinity. * -- Otherwise (result is infinity, flag is 0), then P1 = P2 and we should * use the 'double' code. * * Cost: 16 multiplications */ static const uint16_t _src_ec_ec_prime_i31_ccode_add[] = { /* * Compute u1 = x1*z2^2 (in t1) and s1 = y1*z2^3 (in t3). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cP2z, _src_ec_ec_prime_i31_cP2z), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct3), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_cP2z, _src_ec_ec_prime_i31_ct3), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_ct4), /* * Compute u2 = x2*z1^2 (in t2) and s2 = y2*z1^3 (in t4). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_cP1z), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP2x, _src_ec_ec_prime_i31_ct4), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct5, _src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_ct4), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_cP2y, _src_ec_ec_prime_i31_ct5), /* * Compute h = u2 - u1 (in t2) and r = s2 - s1 (in t4). */ MSUB(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct1), MSUB(_src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_ct3), /* * Report cases where r = 0 through the returned flag. */ MTZ(_src_ec_ec_prime_i31_ct4), /* * Compute u1*h^2 (in t6) and h^3 (in t5). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct7, _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct2), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct6, _src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct7), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct5, _src_ec_ec_prime_i31_ct7, _src_ec_ec_prime_i31_ct2), /* * Compute x3 = r^2 - h^3 - 2*u1*h^2. * t1 and t7 can be used as scratch registers. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_ct4), MSUB(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct5), MSUB(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct6), MSUB(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct6), /* * Compute y3 = r*(u1*h^2 - x3) - s1*h^3. */ MSUB(_src_ec_ec_prime_i31_ct6, _src_ec_ec_prime_i31_cP1x), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_ct4, _src_ec_ec_prime_i31_ct6), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct5, _src_ec_ec_prime_i31_ct3), MSUB(_src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_ct1), /* * Compute z3 = h*z1*z2. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_cP2z), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct2), ENDCODE }; /* * Check that the point is on the curve. This code snippet assumes the * following conventions: * -- Coordinates x and y have been freshly decoded in P1 (but not * converted to Montgomery coordinates yet). * -- P2x, P2y and P2z are set to, respectively, R^2, b*R and 1. */ static const uint16_t _src_ec_ec_prime_i31_ccode_check[] = { /* Convert x and y to Montgomery representation. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_cP2x), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_cP2x), MSET(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct1), MSET(_src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_ct2), /* Compute x^3 in t1. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_cP1x), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct2), /* Subtract 3*x from t1. */ MSUB(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x), MSUB(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x), MSUB(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1x), /* Add b. */ MADD(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP2y), /* Compute y^2 in t2. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_cP1y), /* Compare y^2 with x^3 - 3*x + b; they must match. */ MSUB(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_ct2), MTZ(_src_ec_ec_prime_i31_ct1), /* Set z to 1 (in Montgomery representation). */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_cP2x, _src_ec_ec_prime_i31_cP2z), ENDCODE }; /* * Conversion back to affine coordinates. This code snippet assumes that * the z coordinate of P2 is set to 1 (not in Montgomery representation). */ static const uint16_t _src_ec_ec_prime_i31_ccode_affine[] = { /* Save z*R in t1. */ MSET(_src_ec_ec_prime_i31_ct1, _src_ec_ec_prime_i31_cP1z), /* Compute z^3 in t2. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_cP1z), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cP1z, _src_ec_ec_prime_i31_ct2), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cP2z), /* Invert to (1/z^3) in t2. */ MINV(_src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_ct4), /* Compute y. */ MSET(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_cP1y), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1y, _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct3), /* Compute (1/z^2) in t3. */ _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_ct3, _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct1), /* Compute x. */ MSET( _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_cP1x), _src_ec_ec_prime_i31_cMMUL(_src_ec_ec_prime_i31_cP1x, _src_ec_ec_prime_i31_ct2, _src_ec_ec_prime_i31_ct3), ENDCODE }; static uint32_t _src_ec_ec_prime_i31_crun_code(_src_ec_ec_prime_i31_cjacobian *P1, const _src_ec_ec_prime_i31_cjacobian *P2, const _src_ec_ec_prime_i31_ccurve_params *cc, const uint16_t *code) { uint32_t r; uint32_t t[13][I31_LEN]; size_t u; r = 1; /* * Copy the two operands in the dedicated registers. */ memcpy(t[_src_ec_ec_prime_i31_cP1x], P1->c, 3 * I31_LEN * sizeof(uint32_t)); memcpy(t[_src_ec_ec_prime_i31_cP2x], P2->c, 3 * I31_LEN * sizeof(uint32_t)); /* * Run formulas. */ for (u = 0;; u ++) { unsigned op, d, a, b; op = code[u]; if (op == 0) { break; } d = (op >> 8) & 0x0F; a = (op >> 4) & 0x0F; b = op & 0x0F; op >>= 12; switch (op) { uint32_t ctl; size_t plen; unsigned char tp[(BR_MAX_EC_SIZE + 7) >> 3]; case 0: memcpy(t[d], t[a], I31_LEN * sizeof(uint32_t)); break; case 1: ctl = br_i31_add(t[d], t[a], 1); ctl |= NOT(br_i31_sub(t[d], cc->p, 0)); br_i31_sub(t[d], cc->p, ctl); break; case 2: br_i31_add(t[d], cc->p, br_i31_sub(t[d], t[a], 1)); break; case 3: br_i31_montymul(t[d], t[a], t[b], cc->p, cc->p0i); break; case 4: plen = (cc->p[0] - (cc->p[0] >> 5) + 7) >> 3; br_i31_encode(tp, plen, cc->p); tp[plen - 1] -= 2; br_i31_modpow(t[d], tp, plen, cc->p, cc->p0i, t[a], t[b]); break; default: r &= ~br_i31_iszero(t[d]); break; } } /* * Copy back result. */ memcpy(P1->c, t[_src_ec_ec_prime_i31_cP1x], 3 * I31_LEN * sizeof(uint32_t)); return r; } static void _src_ec_ec_prime_i31_cset_one(uint32_t *x, const uint32_t *p) { size_t plen; plen = (p[0] + 63) >> 5; memset(x, 0, plen * sizeof *x); x[0] = p[0]; x[1] = 0x00000001; } static void _src_ec_ec_prime_i31_cpoint_zero(_src_ec_ec_prime_i31_cjacobian *P, const _src_ec_ec_prime_i31_ccurve_params *cc) { memset(P, 0, sizeof *P); P->c[0][0] = P->c[1][0] = P->c[2][0] = cc->p[0]; } static inline void _src_ec_ec_prime_i31_cpoint_double(_src_ec_ec_prime_i31_cjacobian *P, const _src_ec_ec_prime_i31_ccurve_params *cc) { _src_ec_ec_prime_i31_crun_code(P, P, cc, _src_ec_ec_prime_i31_ccode_double); } static inline uint32_t _src_ec_ec_prime_i31_cpoint_add(_src_ec_ec_prime_i31_cjacobian *P1, const _src_ec_ec_prime_i31_cjacobian *P2, const _src_ec_ec_prime_i31_ccurve_params *cc) { return _src_ec_ec_prime_i31_crun_code(P1, P2, cc, _src_ec_ec_prime_i31_ccode_add); } static void _src_ec_ec_prime_i31_cpoint_mul(_src_ec_ec_prime_i31_cjacobian *P, const unsigned char *x, size_t xlen, const _src_ec_ec_prime_i31_ccurve_params *cc) { /* * We do a simple double-and-add ladder with a 2-bit window * to make only one add every two doublings. We thus first * precompute 2P and 3P in some local buffers. * * We always perform two doublings and one addition; the * addition is with P, 2P and 3P and is done in a temporary * array. * * The addition code cannot handle cases where one of the * operands is infinity, which is the case at the start of the * ladder. We therefore need to maintain a flag that controls * this situation. */ uint32_t qz; _src_ec_ec_prime_i31_cjacobian P2, P3, Q, T, U; memcpy(&P2, P, sizeof P2); _src_ec_ec_prime_i31_cpoint_double(&P2, cc); memcpy(&P3, P, sizeof P3); _src_ec_ec_prime_i31_cpoint_add(&P3, &P2, cc); _src_ec_ec_prime_i31_cpoint_zero(&Q, cc); qz = 1; while (xlen -- > 0) { int k; for (k = 6; k >= 0; k -= 2) { uint32_t bits; uint32_t bnz; _src_ec_ec_prime_i31_cpoint_double(&Q, cc); _src_ec_ec_prime_i31_cpoint_double(&Q, cc); memcpy(&T, P, sizeof T); memcpy(&U, &Q, sizeof U); bits = (*x >> k) & (uint32_t)3; bnz = NEQ(bits, 0); CCOPY(EQ(bits, 2), &T, &P2, sizeof T); CCOPY(EQ(bits, 3), &T, &P3, sizeof T); _src_ec_ec_prime_i31_cpoint_add(&U, &T, cc); CCOPY(bnz & qz, &Q, &T, sizeof Q); CCOPY(bnz & ~qz, &Q, &U, sizeof Q); qz &= ~bnz; } x ++; } memcpy(P, &Q, sizeof Q); } /* * Decode point into Jacobian coordinates. This function does not support * the point at infinity. If the point is invalid then this returns 0, but * the coordinates are still set to properly formed field elements. */ static uint32_t _src_ec_ec_prime_i31_cpoint_decode(_src_ec_ec_prime_i31_cjacobian *P, const void *src, size_t len, const _src_ec_ec_prime_i31_ccurve_params *cc) { /* * Points must use uncompressed format: * -- first byte is 0x04; * -- coordinates X and Y use unsigned big-endian, with the same * length as the field modulus. * * We don't support hybrid format (uncompressed, but first byte * has value 0x06 or 0x07, depending on the least significant bit * of Y) because it is rather useless, and explicitly forbidden * by PKIX (RFC 5480, section 2.2). * * We don't support compressed format either, because it is not * much used in practice (there are or were patent-related * concerns about point compression, which explains the lack of * generalised support). Also, point compression support would * need a bit more code. */ const unsigned char *buf; size_t plen, zlen; uint32_t r; _src_ec_ec_prime_i31_cjacobian Q; buf = (const unsigned char*)src; _src_ec_ec_prime_i31_cpoint_zero(P, cc); plen = (cc->p[0] - (cc->p[0] >> 5) + 7) >> 3; if (len != 1 + (plen << 1)) { return 0; } r = br_i31_decode_mod(P->c[0], buf + 1, plen, cc->p); r &= br_i31_decode_mod(P->c[1], buf + 1 + plen, plen, cc->p); /* * Check first byte. */ r &= EQ(buf[0], 0x04); /* obsolete r &= EQ(buf[0], 0x04) | (EQ(buf[0] & 0xFE, 0x06) & ~(uint32_t)(buf[0] ^ buf[plen << 1])); */ /* * Convert coordinates and check that the point is valid. */ zlen = ((cc->p[0] + 63) >> 5) * sizeof(uint32_t); memcpy(Q.c[0], cc->R2, zlen); memcpy(Q.c[1], cc->b, zlen); _src_ec_ec_prime_i31_cset_one(Q.c[2], cc->p); r &= ~_src_ec_ec_prime_i31_crun_code(P, &Q, cc, _src_ec_ec_prime_i31_ccode_check); return r; } /* * Encode a point. This method assumes that the point is correct and is * not the point at infinity. Encoded size is always 1+2*plen, where * plen is the field modulus length, in bytes. */ static void _src_ec_ec_prime_i31_cpoint_encode(void *dst, const _src_ec_ec_prime_i31_cjacobian *P, const _src_ec_ec_prime_i31_ccurve_params *cc) { unsigned char *buf; uint32_t xbl; size_t plen; _src_ec_ec_prime_i31_cjacobian Q, T; buf = (unsigned char*)dst; xbl = cc->p[0]; xbl -= (xbl >> 5); plen = (xbl + 7) >> 3; buf[0] = 0x04; memcpy(&Q, P, sizeof *P); _src_ec_ec_prime_i31_cset_one(T.c[2], cc->p); _src_ec_ec_prime_i31_crun_code(&Q, &T, cc, _src_ec_ec_prime_i31_ccode_affine); br_i31_encode(buf + 1, plen, Q.c[0]); br_i31_encode(buf + 1 + plen, plen, Q.c[1]); } static const br_ec_curve_def * _src_ec_ec_prime_i31_cid_to_curve_def(int curve) { switch (curve) { case BR_EC_secp256r1: return &br_secp256r1; case BR_EC_secp384r1: return &br_secp384r1; case BR_EC_secp521r1: return &br_secp521r1; } return NULL; } static const unsigned char * _src_ec_ec_prime_i31_capi_generator(int curve, size_t *len) { const br_ec_curve_def *cd; cd = _src_ec_ec_prime_i31_cid_to_curve_def(curve); *len = cd->generator_len; return cd->generator; } static const unsigned char * _src_ec_ec_prime_i31_capi_order(int curve, size_t *len) { const br_ec_curve_def *cd; cd = _src_ec_ec_prime_i31_cid_to_curve_def(curve); *len = cd->order_len; return cd->order; } static size_t _src_ec_ec_prime_i31_capi_xoff(int curve, size_t *len) { _src_ec_ec_prime_i31_capi_generator(curve, len); *len >>= 1; return 1; } static uint32_t _src_ec_ec_prime_i31_capi_mul(unsigned char *G, size_t Glen, const unsigned char *x, size_t xlen, int curve) { uint32_t r; const _src_ec_ec_prime_i31_ccurve_params *cc; _src_ec_ec_prime_i31_cjacobian P; cc = _src_ec_ec_prime_i31_cid_to_curve(curve); if (Glen != cc->point_len) { return 0; } r = _src_ec_ec_prime_i31_cpoint_decode(&P, G, Glen, cc); _src_ec_ec_prime_i31_cpoint_mul(&P, x, xlen, cc); _src_ec_ec_prime_i31_cpoint_encode(G, &P, cc); return r; } static size_t _src_ec_ec_prime_i31_capi_mulgen(unsigned char *R, const unsigned char *x, size_t xlen, int curve) { const unsigned char *G; size_t Glen; G = _src_ec_ec_prime_i31_capi_generator(curve, &Glen); memcpy(R, G, Glen); _src_ec_ec_prime_i31_capi_mul(R, Glen, x, xlen, curve); return Glen; } static uint32_t _src_ec_ec_prime_i31_capi_muladd(unsigned char *A, const unsigned char *B, size_t len, const unsigned char *x, size_t xlen, const unsigned char *y, size_t ylen, int curve) { uint32_t r, t, z; const _src_ec_ec_prime_i31_ccurve_params *cc; _src_ec_ec_prime_i31_cjacobian P, Q; /* * TODO: see about merging the two ladders. Right now, we do * two independent point multiplications, which is a bit * wasteful of CPU resources (but yields short code). */ cc = _src_ec_ec_prime_i31_cid_to_curve(curve); if (len != cc->point_len) { return 0; } r = _src_ec_ec_prime_i31_cpoint_decode(&P, A, len, cc); if (B == NULL) { size_t Glen; B = _src_ec_ec_prime_i31_capi_generator(curve, &Glen); } r &= _src_ec_ec_prime_i31_cpoint_decode(&Q, B, len, cc); _src_ec_ec_prime_i31_cpoint_mul(&P, x, xlen, cc); _src_ec_ec_prime_i31_cpoint_mul(&Q, y, ylen, cc); /* * We want to compute P+Q. Since the base points A and B are distinct * from infinity, and the multipliers are non-zero and lower than the * curve order, then we know that P and Q are non-infinity. This * leaves two special situations to test for: * -- If P = Q then we must use _src_ec_ec_prime_i31_cpoint_double(). * -- If P+Q = 0 then we must report an error. */ t = _src_ec_ec_prime_i31_cpoint_add(&P, &Q, cc); _src_ec_ec_prime_i31_cpoint_double(&Q, cc); z = br_i31_iszero(P.c[2]); /* * If z is 1 then either P+Q = 0 (t = 1) or P = Q (t = 0). So we * have the following: * * z = 0, t = 0 return P (normal addition) * z = 0, t = 1 return P (normal addition) * z = 1, t = 0 return Q (a 'double' case) * z = 1, t = 1 report an error (P+Q = 0) */ CCOPY(z & ~t, &P, &Q, sizeof Q); _src_ec_ec_prime_i31_cpoint_encode(A, &P, cc); r &= ~(z & t); return r; } /* see bearssl_ec.h */ const br_ec_impl br_ec_prime_i31 = { (uint32_t)0x03800000, &_src_ec_ec_prime_i31_capi_generator, &_src_ec_ec_prime_i31_capi_order, &_src_ec_ec_prime_i31_capi_xoff, &_src_ec_ec_prime_i31_capi_mul, &_src_ec_ec_prime_i31_capi_mulgen, &_src_ec_ec_prime_i31_capi_muladd }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char POINT_LEN[] = { 0, /* 0: not a valid curve ID */ 43, /* sect163k1 */ 43, /* sect163r1 */ 43, /* sect163r2 */ 51, /* sect193r1 */ 51, /* sect193r2 */ 61, /* sect233k1 */ 61, /* sect233r1 */ 61, /* sect239k1 */ 73, /* sect283k1 */ 73, /* sect283r1 */ 105, /* sect409k1 */ 105, /* sect409r1 */ 145, /* sect571k1 */ 145, /* sect571r1 */ 41, /* secp160k1 */ 41, /* secp160r1 */ 41, /* secp160r2 */ 49, /* secp192k1 */ 49, /* secp192r1 */ 57, /* secp224k1 */ 57, /* secp224r1 */ 65, /* secp256k1 */ 65, /* secp256r1 */ 97, /* secp384r1 */ 133, /* secp521r1 */ 65, /* brainpoolP256r1 */ 97, /* brainpoolP384r1 */ 129, /* brainpoolP512r1 */ 32, /* curve25519 */ 56, /* curve448 */ }; /* see bearssl_ec.h */ size_t br_ec_compute_pub(const br_ec_impl *impl, br_ec_public_key *pk, void *kbuf, const br_ec_private_key *sk) { int curve; size_t len; curve = sk->curve; if (curve < 0 || curve >= 32 || curve >= (int)(sizeof POINT_LEN) || ((impl->supported_curves >> curve) & 1) == 0) { return 0; } if (kbuf == NULL) { return POINT_LEN[curve]; } len = impl->mulgen((unsigned char*)kbuf, sk->x, sk->xlen, curve); if (pk != NULL) { pk->curve = curve; pk->q = (unsigned char*)kbuf; pk->qlen = len; } return len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char _src_ec_ec_secp256r1_cP256_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51 }; static const unsigned char _src_ec_ec_secp256r1_cP256_G[] = { 0x04, 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, 0x4F, 0xE3, 0x42, 0xE2, 0xFE, 0x1A, 0x7F, 0x9B, 0x8E, 0xE7, 0xEB, 0x4A, 0x7C, 0x0F, 0x9E, 0x16, 0x2B, 0xCE, 0x33, 0x57, 0x6B, 0x31, 0x5E, 0xCE, 0xCB, 0xB6, 0x40, 0x68, 0x37, 0xBF, 0x51, 0xF5 }; /* see inner.h */ const br_ec_curve_def br_secp256r1 = { BR_EC_secp256r1, _src_ec_ec_secp256r1_cP256_N, sizeof _src_ec_ec_secp256r1_cP256_N, _src_ec_ec_secp256r1_cP256_G, sizeof _src_ec_ec_secp256r1_cP256_G }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char P384_N[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC7, 0x63, 0x4D, 0x81, 0xF4, 0x37, 0x2D, 0xDF, 0x58, 0x1A, 0x0D, 0xB2, 0x48, 0xB0, 0xA7, 0x7A, 0xEC, 0xEC, 0x19, 0x6A, 0xCC, 0xC5, 0x29, 0x73 }; static const unsigned char P384_G[] = { 0x04, 0xAA, 0x87, 0xCA, 0x22, 0xBE, 0x8B, 0x05, 0x37, 0x8E, 0xB1, 0xC7, 0x1E, 0xF3, 0x20, 0xAD, 0x74, 0x6E, 0x1D, 0x3B, 0x62, 0x8B, 0xA7, 0x9B, 0x98, 0x59, 0xF7, 0x41, 0xE0, 0x82, 0x54, 0x2A, 0x38, 0x55, 0x02, 0xF2, 0x5D, 0xBF, 0x55, 0x29, 0x6C, 0x3A, 0x54, 0x5E, 0x38, 0x72, 0x76, 0x0A, 0xB7, 0x36, 0x17, 0xDE, 0x4A, 0x96, 0x26, 0x2C, 0x6F, 0x5D, 0x9E, 0x98, 0xBF, 0x92, 0x92, 0xDC, 0x29, 0xF8, 0xF4, 0x1D, 0xBD, 0x28, 0x9A, 0x14, 0x7C, 0xE9, 0xDA, 0x31, 0x13, 0xB5, 0xF0, 0xB8, 0xC0, 0x0A, 0x60, 0xB1, 0xCE, 0x1D, 0x7E, 0x81, 0x9D, 0x7A, 0x43, 0x1D, 0x7C, 0x90, 0xEA, 0x0E, 0x5F }; /* see inner.h */ const br_ec_curve_def br_secp384r1 = { BR_EC_secp384r1, P384_N, sizeof P384_N, P384_G, sizeof P384_G }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const unsigned char P521_N[] = { 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFA, 0x51, 0x86, 0x87, 0x83, 0xBF, 0x2F, 0x96, 0x6B, 0x7F, 0xCC, 0x01, 0x48, 0xF7, 0x09, 0xA5, 0xD0, 0x3B, 0xB5, 0xC9, 0xB8, 0x89, 0x9C, 0x47, 0xAE, 0xBB, 0x6F, 0xB7, 0x1E, 0x91, 0x38, 0x64, 0x09 }; static const unsigned char P521_G[] = { 0x04, 0x00, 0xC6, 0x85, 0x8E, 0x06, 0xB7, 0x04, 0x04, 0xE9, 0xCD, 0x9E, 0x3E, 0xCB, 0x66, 0x23, 0x95, 0xB4, 0x42, 0x9C, 0x64, 0x81, 0x39, 0x05, 0x3F, 0xB5, 0x21, 0xF8, 0x28, 0xAF, 0x60, 0x6B, 0x4D, 0x3D, 0xBA, 0xA1, 0x4B, 0x5E, 0x77, 0xEF, 0xE7, 0x59, 0x28, 0xFE, 0x1D, 0xC1, 0x27, 0xA2, 0xFF, 0xA8, 0xDE, 0x33, 0x48, 0xB3, 0xC1, 0x85, 0x6A, 0x42, 0x9B, 0xF9, 0x7E, 0x7E, 0x31, 0xC2, 0xE5, 0xBD, 0x66, 0x01, 0x18, 0x39, 0x29, 0x6A, 0x78, 0x9A, 0x3B, 0xC0, 0x04, 0x5C, 0x8A, 0x5F, 0xB4, 0x2C, 0x7D, 0x1B, 0xD9, 0x98, 0xF5, 0x44, 0x49, 0x57, 0x9B, 0x44, 0x68, 0x17, 0xAF, 0xBD, 0x17, 0x27, 0x3E, 0x66, 0x2C, 0x97, 0xEE, 0x72, 0x99, 0x5E, 0xF4, 0x26, 0x40, 0xC5, 0x50, 0xB9, 0x01, 0x3F, 0xAD, 0x07, 0x61, 0x35, 0x3C, 0x70, 0x86, 0xA2, 0x72, 0xC2, 0x40, 0x88, 0xBE, 0x94, 0x76, 0x9F, 0xD1, 0x66, 0x50 }; /* see inner.h */ const br_ec_curve_def br_secp521r1 = { BR_EC_secp521r1, P521_N, sizeof P521_N, P521_G, sizeof P521_G }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ size_t br_ecdsa_asn1_to_raw(void *sig, size_t sig_len) { /* * Note: this code is a bit lenient in that it accepts a few * deviations to DER with regards to minimality of encoding of * lengths and integer values. These deviations are still * unambiguous. * * Signature format is a SEQUENCE of two INTEGER values. We * support only integers of less than 127 bytes each (signed * encoding) so the resulting raw signature will have length * at most 254 bytes. */ unsigned char *buf, *r, *s; size_t zlen, rlen, slen, off; unsigned char tmp[254]; buf = (unsigned char*)sig; if (sig_len < 8) { return 0; } /* * First byte is SEQUENCE tag. */ if (buf[0] != 0x30) { return 0; } /* * The SEQUENCE length will be encoded over one or two bytes. We * limit the total SEQUENCE contents to 255 bytes, because it * makes things simpler; this is enough for subgroup orders up * to 999 bits. */ zlen = buf[1]; if (zlen > 0x80) { if (zlen != 0x81) { return 0; } zlen = buf[2]; if (zlen != sig_len - 3) { return 0; } off = 3; } else { if (zlen != sig_len - 2) { return 0; } off = 2; } /* * First INTEGER (r). */ if (buf[off ++] != 0x02) { return 0; } rlen = buf[off ++]; if (rlen >= 0x80) { return 0; } r = buf + off; off += rlen; /* * Second INTEGER (s). */ if (off + 2 > sig_len) { return 0; } if (buf[off ++] != 0x02) { return 0; } slen = buf[off ++]; if (slen >= 0x80 || slen != sig_len - off) { return 0; } s = buf + off; /* * Removing leading zeros from r and s. */ while (rlen > 0 && *r == 0) { rlen --; r ++; } while (slen > 0 && *s == 0) { slen --; s ++; } /* * Compute common length for the two integers, then copy integers * into the temporary buffer, and finally copy it back over the * signature buffer. */ zlen = rlen > slen ? rlen : slen; sig_len = zlen << 1; memset(tmp, 0, sig_len); memcpy(tmp + zlen - rlen, r, rlen); memcpy(tmp + sig_len - slen, s, slen); memcpy(sig, tmp, sig_len); return sig_len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ br_ecdsa_sign br_ecdsa_sign_asn1_get_default(void) { #if BR_LOMUL return &br_ecdsa_i15_sign_asn1; #else return &br_ecdsa_i31_sign_asn1; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ br_ecdsa_sign br_ecdsa_sign_raw_get_default(void) { #if BR_LOMUL return &br_ecdsa_i15_sign_raw; #else return &br_ecdsa_i31_sign_raw; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ br_ecdsa_vrfy br_ecdsa_vrfy_asn1_get_default(void) { #if BR_LOMUL return &br_ecdsa_i15_vrfy_asn1; #else return &br_ecdsa_i31_vrfy_asn1; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ec.h */ br_ecdsa_vrfy br_ecdsa_vrfy_raw_get_default(void) { #if BR_LOMUL return &br_ecdsa_i15_vrfy_raw; #else return &br_ecdsa_i31_vrfy_raw; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_ecdsa_i15_bits2int(uint16_t *x, const void *src, size_t len, uint32_t ebitlen) { uint32_t bitlen, hbitlen; int sc; bitlen = ebitlen - (ebitlen >> 4); hbitlen = (uint32_t)len << 3; if (hbitlen > bitlen) { len = (bitlen + 7) >> 3; sc = (int)((hbitlen - bitlen) & 7); } else { sc = 0; } br_i15_zero(x, ebitlen); br_i15_decode(x, src, len); br_i15_rshift(x, sc); x[0] = ebitlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_ec_ecdsa_i15_sign_asn1_cORDER_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ size_t br_ecdsa_i15_sign_asn1(const br_ec_impl *impl, const br_hash_class *hf, const void *hash_value, const br_ec_private_key *sk, void *sig) { unsigned char rsig[(_src_ec_ecdsa_i15_sign_asn1_cORDER_LEN << 1) + 12]; size_t sig_len; sig_len = br_ecdsa_i15_sign_raw(impl, hf, hash_value, sk, rsig); if (sig_len == 0) { return 0; } sig_len = br_ecdsa_raw_to_asn1(rsig, sig_len); memcpy(sig, rsig, sig_len); return sig_len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define I15_LEN ((BR_MAX_EC_SIZE + 29) / 15) #define POINT_LEN (1 + (((BR_MAX_EC_SIZE + 7) >> 3) << 1)) #define _src_ec_ecdsa_i15_sign_raw_cORDER_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ size_t br_ecdsa_i15_sign_raw(const br_ec_impl *impl, const br_hash_class *hf, const void *hash_value, const br_ec_private_key *sk, void *sig) { /* * IMPORTANT: this code is fit only for curves with a prime * order. This is needed so that modular reduction of the X * coordinate of a point can be done with a simple subtraction. * We also rely on the last byte of the curve order to be distinct * from 0 and 1. */ const br_ec_curve_def *cd; uint16_t n[I15_LEN], r[I15_LEN], s[I15_LEN], x[I15_LEN]; uint16_t m[I15_LEN], k[I15_LEN], t1[I15_LEN], t2[I15_LEN]; unsigned char tt[_src_ec_ecdsa_i15_sign_raw_cORDER_LEN << 1]; unsigned char eU[POINT_LEN]; size_t hash_len, nlen, ulen; uint16_t n0i; uint32_t ctl; br_hmac_drbg_context drbg; /* * If the curve is not supported, then exit with an error. */ if (((impl->supported_curves >> sk->curve) & 1) == 0) { return 0; } /* * Get the curve parameters (generator and order). */ switch (sk->curve) { case BR_EC_secp256r1: cd = &br_secp256r1; break; case BR_EC_secp384r1: cd = &br_secp384r1; break; case BR_EC_secp521r1: cd = &br_secp521r1; break; default: return 0; } /* * Get modulus. */ nlen = cd->order_len; br_i15_decode(n, cd->order, nlen); n0i = br_i15_ninv15(n[1]); /* * Get private key as an i15 integer. This also checks that the * private key is well-defined (not zero, and less than the * curve order). */ if (!br_i15_decode_mod(x, sk->x, sk->xlen, n)) { return 0; } if (br_i15_iszero(x)) { return 0; } /* * Get hash length. */ hash_len = (hf->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; /* * Truncate and reduce the hash value modulo the curve order. */ br_ecdsa_i15_bits2int(m, hash_value, hash_len, n[0]); br_i15_sub(m, n, br_i15_sub(m, n, 0) ^ 1); /* * RFC 6979 generation of the "k" value. * * The process uses HMAC_DRBG (with the hash function used to * process the message that is to be signed). The seed is the * concatenation of the encodings of the private key and * the hash value (after truncation and modular reduction). */ br_i15_encode(tt, nlen, x); br_i15_encode(tt + nlen, nlen, m); br_hmac_drbg_init(&drbg, hf, tt, nlen << 1); for (;;) { br_hmac_drbg_generate(&drbg, tt, nlen); br_ecdsa_i15_bits2int(k, tt, nlen, n[0]); if (br_i15_iszero(k)) { continue; } if (br_i15_sub(k, n, 0)) { break; } } /* * Compute k*G and extract the X coordinate, then reduce it * modulo the curve order. Since we support only curves with * prime order, that reduction is only a matter of computing * a subtraction. */ br_i15_encode(tt, nlen, k); ulen = impl->mulgen(eU, tt, nlen, sk->curve); br_i15_zero(r, n[0]); br_i15_decode(r, &eU[1], ulen >> 1); r[0] = n[0]; br_i15_sub(r, n, br_i15_sub(r, n, 0) ^ 1); /* * Compute 1/k in double-Montgomery representation. We do so by * first converting _from_ Montgomery representation (twice), * then using a modular exponentiation. */ br_i15_from_monty(k, n, n0i); br_i15_from_monty(k, n, n0i); memcpy(tt, cd->order, nlen); tt[nlen - 1] -= 2; br_i15_modpow(k, tt, nlen, n, n0i, t1, t2); /* * Compute s = (m+xr)/k (mod n). * The k[] array contains R^2/k (double-Montgomery representation); * we thus can use direct Montgomery multiplications and conversions * from Montgomery, avoiding any call to br_i15_to_monty() (which * is slower). */ br_i15_from_monty(m, n, n0i); br_i15_montymul(t1, x, r, n, n0i); ctl = br_i15_add(t1, m, 1); ctl |= br_i15_sub(t1, n, 0) ^ 1; br_i15_sub(t1, n, ctl); br_i15_montymul(s, t1, k, n, n0i); /* * Encode r and s in the signature. */ br_i15_encode(sig, nlen, r); br_i15_encode((unsigned char *)sig + nlen, nlen, s); return nlen << 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define FIELD_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ uint32_t br_ecdsa_i15_vrfy_asn1(const br_ec_impl *impl, const void *hash, size_t hash_len, const br_ec_public_key *pk, const void *sig, size_t sig_len) { /* * We use a double-sized buffer because a malformed ASN.1 signature * may trigger a size expansion when converting to "raw" format. */ unsigned char rsig[(FIELD_LEN << 2) + 24]; if (sig_len > ((sizeof rsig) >> 1)) { return 0; } memcpy(rsig, sig, sig_len); sig_len = br_ecdsa_asn1_to_raw(rsig, sig_len); return br_ecdsa_i15_vrfy_raw(impl, hash, hash_len, pk, rsig, sig_len); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define I15_LEN ((BR_MAX_EC_SIZE + 29) / 15) #define POINT_LEN (1 + (((BR_MAX_EC_SIZE + 7) >> 3) << 1)) /* see bearssl_ec.h */ uint32_t br_ecdsa_i15_vrfy_raw(const br_ec_impl *impl, const void *hash, size_t hash_len, const br_ec_public_key *pk, const void *sig, size_t sig_len) { /* * IMPORTANT: this code is fit only for curves with a prime * order. This is needed so that modular reduction of the X * coordinate of a point can be done with a simple subtraction. */ const br_ec_curve_def *cd; uint16_t n[I15_LEN], r[I15_LEN], s[I15_LEN], t1[I15_LEN], t2[I15_LEN]; unsigned char tx[(BR_MAX_EC_SIZE + 7) >> 3]; unsigned char ty[(BR_MAX_EC_SIZE + 7) >> 3]; unsigned char eU[POINT_LEN]; size_t nlen, rlen, ulen; uint16_t n0i; uint32_t res; /* * If the curve is not supported, then report an error. */ if (((impl->supported_curves >> pk->curve) & 1) == 0) { return 0; } /* * Get the curve parameters (generator and order). */ switch (pk->curve) { case BR_EC_secp256r1: cd = &br_secp256r1; break; case BR_EC_secp384r1: cd = &br_secp384r1; break; case BR_EC_secp521r1: cd = &br_secp521r1; break; default: return 0; } /* * Signature length must be even. */ if (sig_len & 1) { return 0; } rlen = sig_len >> 1; /* * Public key point must have the proper size for this curve. */ if (pk->qlen != cd->generator_len) { return 0; } /* * Get modulus; then decode the r and s values. They must be * lower than the modulus, and s must not be null. */ nlen = cd->order_len; br_i15_decode(n, cd->order, nlen); n0i = br_i15_ninv15(n[1]); if (!br_i15_decode_mod(r, sig, rlen, n)) { return 0; } if (!br_i15_decode_mod(s, (const unsigned char *)sig + rlen, rlen, n)) { return 0; } if (br_i15_iszero(s)) { return 0; } /* * Invert s. We do that with a modular exponentiation; we use * the fact that for all the curves we support, the least * significant byte is not 0 or 1, so we can subtract 2 without * any carry to process. * We also want 1/s in Montgomery representation, which can be * done by converting _from_ Montgomery representation before * the inversion (because (1/s)*R = 1/(s/R)). */ br_i15_from_monty(s, n, n0i); memcpy(tx, cd->order, nlen); tx[nlen - 1] -= 2; br_i15_modpow(s, tx, nlen, n, n0i, t1, t2); /* * Truncate the hash to the modulus length (in bits) and reduce * it modulo the curve order. The modular reduction can be done * with a subtraction since the truncation already reduced the * value to the modulus bit length. */ br_ecdsa_i15_bits2int(t1, hash, hash_len, n[0]); br_i15_sub(t1, n, br_i15_sub(t1, n, 0) ^ 1); /* * Multiply the (truncated, reduced) hash value with 1/s, result in * t2, encoded in ty. */ br_i15_montymul(t2, t1, s, n, n0i); br_i15_encode(ty, nlen, t2); /* * Multiply r with 1/s, result in t1, encoded in tx. */ br_i15_montymul(t1, r, s, n, n0i); br_i15_encode(tx, nlen, t1); /* * Compute the point x*Q + y*G. */ ulen = cd->generator_len; memcpy(eU, pk->q, ulen); res = impl->muladd(eU, NULL, ulen, tx, nlen, ty, nlen, cd->curve); /* * Get the X coordinate, reduce modulo the curve order, and * compare with the 'r' value. * * The modular reduction can be done with subtractions because * we work with curves of prime order, so the curve order is * close to the field order (Hasse's theorem). */ br_i15_zero(t1, n[0]); br_i15_decode(t1, &eU[1], ulen >> 1); t1[0] = n[0]; br_i15_sub(t1, n, br_i15_sub(t1, n, 0) ^ 1); res &= ~br_i15_sub(t1, r, 1); res &= br_i15_iszero(t1); return res; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_ecdsa_i31_bits2int(uint32_t *x, const void *src, size_t len, uint32_t ebitlen) { uint32_t bitlen, hbitlen; int sc; bitlen = ebitlen - (ebitlen >> 5); hbitlen = (uint32_t)len << 3; if (hbitlen > bitlen) { len = (bitlen + 7) >> 3; sc = (int)((hbitlen - bitlen) & 7); } else { sc = 0; } br_i31_zero(x, ebitlen); br_i31_decode(x, src, len); br_i31_rshift(x, sc); x[0] = ebitlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_ec_ecdsa_i31_sign_asn1_cORDER_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ size_t br_ecdsa_i31_sign_asn1(const br_ec_impl *impl, const br_hash_class *hf, const void *hash_value, const br_ec_private_key *sk, void *sig) { unsigned char rsig[(_src_ec_ecdsa_i31_sign_asn1_cORDER_LEN << 1) + 12]; size_t sig_len; sig_len = br_ecdsa_i31_sign_raw(impl, hf, hash_value, sk, rsig); if (sig_len == 0) { return 0; } sig_len = br_ecdsa_raw_to_asn1(rsig, sig_len); memcpy(sig, rsig, sig_len); return sig_len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define I31_LEN ((BR_MAX_EC_SIZE + 61) / 31) #define POINT_LEN (1 + (((BR_MAX_EC_SIZE + 7) >> 3) << 1)) #define _src_ec_ecdsa_i31_sign_raw_cORDER_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ size_t br_ecdsa_i31_sign_raw(const br_ec_impl *impl, const br_hash_class *hf, const void *hash_value, const br_ec_private_key *sk, void *sig) { /* * IMPORTANT: this code is fit only for curves with a prime * order. This is needed so that modular reduction of the X * coordinate of a point can be done with a simple subtraction. * We also rely on the last byte of the curve order to be distinct * from 0 and 1. */ const br_ec_curve_def *cd; uint32_t n[I31_LEN], r[I31_LEN], s[I31_LEN], x[I31_LEN]; uint32_t m[I31_LEN], k[I31_LEN], t1[I31_LEN], t2[I31_LEN]; unsigned char tt[_src_ec_ecdsa_i31_sign_raw_cORDER_LEN << 1]; unsigned char eU[POINT_LEN]; size_t hash_len, nlen, ulen; uint32_t n0i, ctl; br_hmac_drbg_context drbg; /* * If the curve is not supported, then exit with an error. */ if (((impl->supported_curves >> sk->curve) & 1) == 0) { return 0; } /* * Get the curve parameters (generator and order). */ switch (sk->curve) { case BR_EC_secp256r1: cd = &br_secp256r1; break; case BR_EC_secp384r1: cd = &br_secp384r1; break; case BR_EC_secp521r1: cd = &br_secp521r1; break; default: return 0; } /* * Get modulus. */ nlen = cd->order_len; br_i31_decode(n, cd->order, nlen); n0i = br_i31_ninv31(n[1]); /* * Get private key as an i31 integer. This also checks that the * private key is well-defined (not zero, and less than the * curve order). */ if (!br_i31_decode_mod(x, sk->x, sk->xlen, n)) { return 0; } if (br_i31_iszero(x)) { return 0; } /* * Get hash length. */ hash_len = (hf->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; /* * Truncate and reduce the hash value modulo the curve order. */ br_ecdsa_i31_bits2int(m, hash_value, hash_len, n[0]); br_i31_sub(m, n, br_i31_sub(m, n, 0) ^ 1); /* * RFC 6979 generation of the "k" value. * * The process uses HMAC_DRBG (with the hash function used to * process the message that is to be signed). The seed is the * concatenation of the encodings of the private key and * the hash value (after truncation and modular reduction). */ br_i31_encode(tt, nlen, x); br_i31_encode(tt + nlen, nlen, m); br_hmac_drbg_init(&drbg, hf, tt, nlen << 1); for (;;) { br_hmac_drbg_generate(&drbg, tt, nlen); br_ecdsa_i31_bits2int(k, tt, nlen, n[0]); if (br_i31_iszero(k)) { continue; } if (br_i31_sub(k, n, 0)) { break; } } /* * Compute k*G and extract the X coordinate, then reduce it * modulo the curve order. Since we support only curves with * prime order, that reduction is only a matter of computing * a subtraction. */ br_i31_encode(tt, nlen, k); ulen = impl->mulgen(eU, tt, nlen, sk->curve); br_i31_zero(r, n[0]); br_i31_decode(r, &eU[1], ulen >> 1); r[0] = n[0]; br_i31_sub(r, n, br_i31_sub(r, n, 0) ^ 1); /* * Compute 1/k in double-Montgomery representation. We do so by * first converting _from_ Montgomery representation (twice), * then using a modular exponentiation. */ br_i31_from_monty(k, n, n0i); br_i31_from_monty(k, n, n0i); memcpy(tt, cd->order, nlen); tt[nlen - 1] -= 2; br_i31_modpow(k, tt, nlen, n, n0i, t1, t2); /* * Compute s = (m+xr)/k (mod n). * The k[] array contains R^2/k (double-Montgomery representation); * we thus can use direct Montgomery multiplications and conversions * from Montgomery, avoiding any call to br_i31_to_monty() (which * is slower). */ br_i31_from_monty(m, n, n0i); br_i31_montymul(t1, x, r, n, n0i); ctl = br_i31_add(t1, m, 1); ctl |= br_i31_sub(t1, n, 0) ^ 1; br_i31_sub(t1, n, ctl); br_i31_montymul(s, t1, k, n, n0i); /* * Encode r and s in the signature. */ br_i31_encode(sig, nlen, r); br_i31_encode((unsigned char *)sig + nlen, nlen, s); return nlen << 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define FIELD_LEN ((BR_MAX_EC_SIZE + 7) >> 3) /* see bearssl_ec.h */ uint32_t br_ecdsa_i31_vrfy_asn1(const br_ec_impl *impl, const void *hash, size_t hash_len, const br_ec_public_key *pk, const void *sig, size_t sig_len) { /* * We use a double-sized buffer because a malformed ASN.1 signature * may trigger a size expansion when converting to "raw" format. */ unsigned char rsig[(FIELD_LEN << 2) + 24]; if (sig_len > ((sizeof rsig) >> 1)) { return 0; } memcpy(rsig, sig, sig_len); sig_len = br_ecdsa_asn1_to_raw(rsig, sig_len); return br_ecdsa_i31_vrfy_raw(impl, hash, hash_len, pk, rsig, sig_len); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define I31_LEN ((BR_MAX_EC_SIZE + 61) / 31) #define POINT_LEN (1 + (((BR_MAX_EC_SIZE + 7) >> 3) << 1)) /* see bearssl_ec.h */ uint32_t br_ecdsa_i31_vrfy_raw(const br_ec_impl *impl, const void *hash, size_t hash_len, const br_ec_public_key *pk, const void *sig, size_t sig_len) { /* * IMPORTANT: this code is fit only for curves with a prime * order. This is needed so that modular reduction of the X * coordinate of a point can be done with a simple subtraction. */ const br_ec_curve_def *cd; uint32_t n[I31_LEN], r[I31_LEN], s[I31_LEN], t1[I31_LEN], t2[I31_LEN]; unsigned char tx[(BR_MAX_EC_SIZE + 7) >> 3]; unsigned char ty[(BR_MAX_EC_SIZE + 7) >> 3]; unsigned char eU[POINT_LEN]; size_t nlen, rlen, ulen; uint32_t n0i, res; /* * If the curve is not supported, then report an error. */ if (((impl->supported_curves >> pk->curve) & 1) == 0) { return 0; } /* * Get the curve parameters (generator and order). */ switch (pk->curve) { case BR_EC_secp256r1: cd = &br_secp256r1; break; case BR_EC_secp384r1: cd = &br_secp384r1; break; case BR_EC_secp521r1: cd = &br_secp521r1; break; default: return 0; } /* * Signature length must be even. */ if (sig_len & 1) { return 0; } rlen = sig_len >> 1; /* * Public key point must have the proper size for this curve. */ if (pk->qlen != cd->generator_len) { return 0; } /* * Get modulus; then decode the r and s values. They must be * lower than the modulus, and s must not be null. */ nlen = cd->order_len; br_i31_decode(n, cd->order, nlen); n0i = br_i31_ninv31(n[1]); if (!br_i31_decode_mod(r, sig, rlen, n)) { return 0; } if (!br_i31_decode_mod(s, (const unsigned char *)sig + rlen, rlen, n)) { return 0; } if (br_i31_iszero(s)) { return 0; } /* * Invert s. We do that with a modular exponentiation; we use * the fact that for all the curves we support, the least * significant byte is not 0 or 1, so we can subtract 2 without * any carry to process. * We also want 1/s in Montgomery representation, which can be * done by converting _from_ Montgomery representation before * the inversion (because (1/s)*R = 1/(s/R)). */ br_i31_from_monty(s, n, n0i); memcpy(tx, cd->order, nlen); tx[nlen - 1] -= 2; br_i31_modpow(s, tx, nlen, n, n0i, t1, t2); /* * Truncate the hash to the modulus length (in bits) and reduce * it modulo the curve order. The modular reduction can be done * with a subtraction since the truncation already reduced the * value to the modulus bit length. */ br_ecdsa_i31_bits2int(t1, hash, hash_len, n[0]); br_i31_sub(t1, n, br_i31_sub(t1, n, 0) ^ 1); /* * Multiply the (truncated, reduced) hash value with 1/s, result in * t2, encoded in ty. */ br_i31_montymul(t2, t1, s, n, n0i); br_i31_encode(ty, nlen, t2); /* * Multiply r with 1/s, result in t1, encoded in tx. */ br_i31_montymul(t1, r, s, n, n0i); br_i31_encode(tx, nlen, t1); /* * Compute the point x*Q + y*G. */ ulen = cd->generator_len; memcpy(eU, pk->q, ulen); res = impl->muladd(eU, NULL, ulen, tx, nlen, ty, nlen, cd->curve); /* * Get the X coordinate, reduce modulo the curve order, and * compare with the 'r' value. * * The modular reduction can be done with subtractions because * we work with curves of prime order, so the curve order is * close to the field order (Hasse's theorem). */ br_i31_zero(t1, n[0]); br_i31_decode(t1, &eU[1], ulen >> 1); t1[0] = n[0]; br_i31_sub(t1, n, br_i31_sub(t1, n, 0) ^ 1); res &= ~br_i31_sub(t1, r, 1); res &= br_i31_iszero(t1); return res; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Compute ASN.1 encoded length for the provided integer. The ASN.1 * encoding is signed, so its leading bit must have value 0; it must * also be of minimal length (so leading bytes of value 0 must be * removed, except if that would contradict the rule about the sign * bit). */ static size_t asn1_int_length(const unsigned char *x, size_t xlen) { while (xlen > 0 && *x == 0) { x ++; xlen --; } if (xlen == 0 || *x >= 0x80) { xlen ++; } return xlen; } /* see bearssl_ec.h */ size_t br_ecdsa_raw_to_asn1(void *sig, size_t sig_len) { /* * Internal buffer is large enough to accommodate a signature * such that r and s fit on 125 bytes each (signed encoding), * meaning a curve order of up to 999 bits. This is the limit * that ensures "simple" length encodings. */ unsigned char *buf; size_t hlen, rlen, slen, zlen, off; unsigned char tmp[257]; buf = (unsigned char*)sig; if ((sig_len & 1) != 0) { return 0; } /* * Compute lengths for the two integers. */ hlen = sig_len >> 1; rlen = asn1_int_length(buf, hlen); slen = asn1_int_length(buf + hlen, hlen); if (rlen > 125 || slen > 125) { return 0; } /* * SEQUENCE header. */ tmp[0] = 0x30; zlen = rlen + slen + 4; if (zlen >= 0x80) { tmp[1] = 0x81; tmp[2] = zlen; off = 3; } else { tmp[1] = zlen; off = 2; } /* * First INTEGER (r). */ tmp[off ++] = 0x02; tmp[off ++] = rlen; if (rlen > hlen) { tmp[off] = 0x00; memcpy(tmp + off + 1, buf, hlen); } else { memcpy(tmp + off, buf + hlen - rlen, rlen); } off += rlen; /* * Second INTEGER (s). */ tmp[off ++] = 0x02; tmp[off ++] = slen; if (slen > hlen) { tmp[off] = 0x00; memcpy(tmp + off + 1, buf + hlen, hlen); } else { memcpy(tmp + off, buf + sig_len - slen, slen); } off += slen; /* * Return ASN.1 signature. */ memcpy(sig, tmp, off); return off; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const br_config_option config[] = { { "BR_64", #if BR_64 1 #else 0 #endif }, { "BR_AES_X86NI", #if BR_AES_X86NI 1 #else 0 #endif }, { "BR_amd64", #if BR_amd64 1 #else 0 #endif }, { "BR_ARMEL_CORTEXM_GCC", #if BR_ARMEL_CORTEXM_GCC 1 #else 0 #endif }, { "BR_BE_UNALIGNED", #if BR_BE_UNALIGNED 1 #else 0 #endif }, { "BR_CLANG", #if BR_CLANG 1 #else 0 #endif }, { "BR_CLANG_3_7", #if BR_CLANG_3_7 1 #else 0 #endif }, { "BR_CLANG_3_8", #if BR_CLANG_3_8 1 #else 0 #endif }, { "BR_CT_MUL15", #if BR_CT_MUL15 1 #else 0 #endif }, { "BR_CT_MUL31", #if BR_CT_MUL31 1 #else 0 #endif }, { "BR_GCC", #if BR_GCC 1 #else 0 #endif }, { "BR_GCC_4_4", #if BR_GCC_4_4 1 #else 0 #endif }, { "BR_GCC_4_5", #if BR_GCC_4_5 1 #else 0 #endif }, { "BR_GCC_4_6", #if BR_GCC_4_6 1 #else 0 #endif }, { "BR_GCC_4_7", #if BR_GCC_4_7 1 #else 0 #endif }, { "BR_GCC_4_8", #if BR_GCC_4_8 1 #else 0 #endif }, { "BR_GCC_4_9", #if BR_GCC_4_9 1 #else 0 #endif }, { "BR_GCC_5_0", #if BR_GCC_5_0 1 #else 0 #endif }, { "BR_i386", #if BR_i386 1 #else 0 #endif }, { "BR_INT128", #if BR_INT128 1 #else 0 #endif }, { "BR_LE_UNALIGNED", #if BR_LE_UNALIGNED 1 #else 0 #endif }, { "BR_LOMUL", #if BR_LOMUL 1 #else 0 #endif }, { "BR_MAX_EC_SIZE", BR_MAX_EC_SIZE }, { "BR_MAX_RSA_SIZE", BR_MAX_RSA_SIZE }, { "BR_MAX_RSA_FACTOR", BR_MAX_RSA_FACTOR }, { "BR_MSC", #if BR_MSC 1 #else 0 #endif }, { "BR_MSC_2005", #if BR_MSC_2005 1 #else 0 #endif }, { "BR_MSC_2008", #if BR_MSC_2008 1 #else 0 #endif }, { "BR_MSC_2010", #if BR_MSC_2010 1 #else 0 #endif }, { "BR_MSC_2012", #if BR_MSC_2012 1 #else 0 #endif }, { "BR_MSC_2013", #if BR_MSC_2013 1 #else 0 #endif }, { "BR_MSC_2015", #if BR_MSC_2015 1 #else 0 #endif }, { "BR_POWER8", #if BR_POWER8 1 #else 0 #endif }, { "BR_RDRAND", #if BR_RDRAND 1 #else 0 #endif }, { "BR_SLOW_MUL", #if BR_SLOW_MUL 1 #else 0 #endif }, { "BR_SLOW_MUL15", #if BR_SLOW_MUL15 1 #else 0 #endif }, { "BR_SSE2", #if BR_SSE2 1 #else 0 #endif }, { "BR_UMUL128", #if BR_UMUL128 1 #else 0 #endif }, { "BR_USE_UNIX_TIME", #if BR_USE_UNIX_TIME 1 #else 0 #endif }, { "BR_USE_WIN32_RAND", #if BR_USE_WIN32_RAND 1 #else 0 #endif }, { "BR_USE_WIN32_TIME", #if BR_USE_WIN32_TIME 1 #else 0 #endif }, { NULL, 0 } }; /* see bearssl.h */ const br_config_option * br_get_config(void) { return config; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * This file contains the encoded OID for the standard hash functions. * Such OID appear in, for instance, the PKCS#1 v1.5 padding for RSA * signatures. */ static const unsigned char md5_OID[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x05 }; static const unsigned char sha1_OID[] = { 0x2B, 0x0E, 0x03, 0x02, 0x1A }; static const unsigned char sha224_OID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04 }; static const unsigned char sha256_OID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01 }; static const unsigned char sha384_OID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02 }; static const unsigned char sha512_OID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03 }; /* see inner.h */ const unsigned char * br_digest_OID(int digest_id, size_t *len) { switch (digest_id) { case br_md5_ID: *len = sizeof md5_OID; return md5_OID; case br_sha1_ID: *len = sizeof sha1_OID; return sha1_OID; case br_sha224_ID: *len = sizeof sha224_OID; return sha224_OID; case br_sha256_ID: *len = sizeof sha256_OID; return sha256_OID; case br_sha384_ID: *len = sizeof sha384_OID; return sha384_OID; case br_sha512_ID: *len = sizeof sha512_OID; return sha512_OID; default: *len = 0; return NULL; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ size_t br_digest_size_by_ID(int digest_id) { switch (digest_id) { case br_md5sha1_ID: return br_md5_SIZE + br_sha1_SIZE; case br_md5_ID: return br_md5_SIZE; case br_sha1_ID: return br_sha1_SIZE; case br_sha224_ID: return br_sha224_SIZE; case br_sha256_ID: return br_sha256_SIZE; case br_sha384_ID: return br_sha384_SIZE; case br_sha512_ID: return br_sha512_SIZE; default: /* abort(); */ return 0; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * We compute "carryless multiplications" through normal integer * multiplications, masking out enough bits to create "holes" in which * carries may expand without altering our bits; we really use 8 data * bits per 32-bit word, spaced every fourth bit. Accumulated carries * may not exceed 8 in total, which fits in 4 bits. * * It would be possible to use a 3-bit spacing, allowing two operands, * one with 7 non-zero data bits, the other one with 10 or 11 non-zero * data bits; this asymmetric splitting makes the overall code more * complex with thresholds and exceptions, and does not appear to be * worth the effort. */ /* * We cannot really autodetect whether multiplications are "slow" or * not. A typical example is the ARM Cortex M0+, which exists in two * versions: one with a 1-cycle multiplication opcode, the other with * a 32-cycle multiplication opcode. They both use exactly the same * architecture and ABI, and cannot be distinguished from each other * at compile-time. * * Since most modern CPU (even embedded CPU) still have fast * multiplications, we use the "fast mul" code by default. */ #if BR_SLOW_MUL /* * This implementation uses Karatsuba-like reduction to make fewer * integer multiplications (9 instead of 16), at the expense of extra * logical operations (XOR, shifts...). On modern x86 CPU that offer * fast, pipelined multiplications, this code is about twice slower than * the simpler code with 16 multiplications. This tendency may be * reversed on low-end platforms with expensive multiplications. */ #define MUL32(h, l, x, y) do { \ uint64_t mul32tmp = MUL(x, y); \ (h) = (uint32_t)(mul32tmp >> 32); \ (l) = (uint32_t)mul32tmp; \ } while (0) static inline void bmul(uint32_t *hi, uint32_t *lo, uint32_t x, uint32_t y) { uint32_t x0, x1, x2, x3; uint32_t y0, y1, y2, y3; uint32_t a0, a1, a2, a3, a4, a5, a6, a7, a8; uint32_t b0, b1, b2, b3, b4, b5, b6, b7, b8; x0 = x & (uint32_t)0x11111111; x1 = x & (uint32_t)0x22222222; x2 = x & (uint32_t)0x44444444; x3 = x & (uint32_t)0x88888888; y0 = y & (uint32_t)0x11111111; y1 = y & (uint32_t)0x22222222; y2 = y & (uint32_t)0x44444444; y3 = y & (uint32_t)0x88888888; /* * (x0+W*x1)*(y0+W*y1) -> a0:b0 * (x2+W*x3)*(y2+W*y3) -> a3:b3 * ((x0+x2)+W*(x1+x3))*((y0+y2)+W*(y1+y3)) -> a6:b6 */ a0 = x0; b0 = y0; a1 = x1 >> 1; b1 = y1 >> 1; a2 = a0 ^ a1; b2 = b0 ^ b1; a3 = x2 >> 2; b3 = y2 >> 2; a4 = x3 >> 3; b4 = y3 >> 3; a5 = a3 ^ a4; b5 = b3 ^ b4; a6 = a0 ^ a3; b6 = b0 ^ b3; a7 = a1 ^ a4; b7 = b1 ^ b4; a8 = a6 ^ a7; b8 = b6 ^ b7; MUL32(b0, a0, b0, a0); MUL32(b1, a1, b1, a1); MUL32(b2, a2, b2, a2); MUL32(b3, a3, b3, a3); MUL32(b4, a4, b4, a4); MUL32(b5, a5, b5, a5); MUL32(b6, a6, b6, a6); MUL32(b7, a7, b7, a7); MUL32(b8, a8, b8, a8); a0 &= (uint32_t)0x11111111; a1 &= (uint32_t)0x11111111; a2 &= (uint32_t)0x11111111; a3 &= (uint32_t)0x11111111; a4 &= (uint32_t)0x11111111; a5 &= (uint32_t)0x11111111; a6 &= (uint32_t)0x11111111; a7 &= (uint32_t)0x11111111; a8 &= (uint32_t)0x11111111; b0 &= (uint32_t)0x11111111; b1 &= (uint32_t)0x11111111; b2 &= (uint32_t)0x11111111; b3 &= (uint32_t)0x11111111; b4 &= (uint32_t)0x11111111; b5 &= (uint32_t)0x11111111; b6 &= (uint32_t)0x11111111; b7 &= (uint32_t)0x11111111; b8 &= (uint32_t)0x11111111; a2 ^= a0 ^ a1; b2 ^= b0 ^ b1; a0 ^= (a2 << 1) ^ (a1 << 2); b0 ^= (b2 << 1) ^ (b1 << 2); a5 ^= a3 ^ a4; b5 ^= b3 ^ b4; a3 ^= (a5 << 1) ^ (a4 << 2); b3 ^= (b5 << 1) ^ (b4 << 2); a8 ^= a6 ^ a7; b8 ^= b6 ^ b7; a6 ^= (a8 << 1) ^ (a7 << 2); b6 ^= (b8 << 1) ^ (b7 << 2); a6 ^= a0 ^ a3; b6 ^= b0 ^ b3; *lo = a0 ^ (a6 << 2) ^ (a3 << 4); *hi = b0 ^ (b6 << 2) ^ (b3 << 4) ^ (a6 >> 30) ^ (a3 >> 28); } #else /* * Simple multiplication in GF(2)[X], using 16 integer multiplications. */ static inline void bmul(uint32_t *hi, uint32_t *lo, uint32_t x, uint32_t y) { uint32_t x0, x1, x2, x3; uint32_t y0, y1, y2, y3; uint64_t z0, z1, z2, z3; uint64_t z; x0 = x & (uint32_t)0x11111111; x1 = x & (uint32_t)0x22222222; x2 = x & (uint32_t)0x44444444; x3 = x & (uint32_t)0x88888888; y0 = y & (uint32_t)0x11111111; y1 = y & (uint32_t)0x22222222; y2 = y & (uint32_t)0x44444444; y3 = y & (uint32_t)0x88888888; z0 = MUL(x0, y0) ^ MUL(x1, y3) ^ MUL(x2, y2) ^ MUL(x3, y1); z1 = MUL(x0, y1) ^ MUL(x1, y0) ^ MUL(x2, y3) ^ MUL(x3, y2); z2 = MUL(x0, y2) ^ MUL(x1, y1) ^ MUL(x2, y0) ^ MUL(x3, y3); z3 = MUL(x0, y3) ^ MUL(x1, y2) ^ MUL(x2, y1) ^ MUL(x3, y0); z0 &= (uint64_t)0x1111111111111111; z1 &= (uint64_t)0x2222222222222222; z2 &= (uint64_t)0x4444444444444444; z3 &= (uint64_t)0x8888888888888888; z = z0 | z1 | z2 | z3; *lo = (uint32_t)z; *hi = (uint32_t)(z >> 32); } #endif /* see bearssl_hash.h */ void br_ghash_ctmul(void *y, const void *h, const void *data, size_t len) { const unsigned char *buf, *hb; unsigned char *yb; uint32_t yw[4]; uint32_t hw[4]; /* * Throughout the loop we handle the y and h values as arrays * of 32-bit words. */ buf = (unsigned char*)data; yb = (unsigned char*)y; hb = (const unsigned char*)h; yw[3] = br_dec32be(yb); yw[2] = br_dec32be(yb + 4); yw[1] = br_dec32be(yb + 8); yw[0] = br_dec32be(yb + 12); hw[3] = br_dec32be(hb); hw[2] = br_dec32be(hb + 4); hw[1] = br_dec32be(hb + 8); hw[0] = br_dec32be(hb + 12); while (len > 0) { const unsigned char *src; unsigned char tmp[16]; int i; uint32_t a[9], b[9], zw[8]; uint32_t c0, c1, c2, c3, d0, d1, d2, d3, e0, e1, e2, e3; /* * Get the next 16-byte block (using zero-padding if * necessary). */ if (len >= 16) { src = buf; buf += 16; len -= 16; } else { memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); src = tmp; len = 0; } /* * Decode the block. The GHASH standard mandates * big-endian encoding. */ yw[3] ^= br_dec32be(src); yw[2] ^= br_dec32be(src + 4); yw[1] ^= br_dec32be(src + 8); yw[0] ^= br_dec32be(src + 12); /* * We multiply two 128-bit field elements. We use * Karatsuba to turn that into three 64-bit * multiplications, which are themselves done with a * total of nine 32-bit multiplications. */ /* * y[0,1]*h[0,1] -> 0..2 * y[2,3]*h[2,3] -> 3..5 * (y[0,1]+y[2,3])*(h[0,1]+h[2,3]) -> 6..8 */ a[0] = yw[0]; b[0] = hw[0]; a[1] = yw[1]; b[1] = hw[1]; a[2] = a[0] ^ a[1]; b[2] = b[0] ^ b[1]; a[3] = yw[2]; b[3] = hw[2]; a[4] = yw[3]; b[4] = hw[3]; a[5] = a[3] ^ a[4]; b[5] = b[3] ^ b[4]; a[6] = a[0] ^ a[3]; b[6] = b[0] ^ b[3]; a[7] = a[1] ^ a[4]; b[7] = b[1] ^ b[4]; a[8] = a[6] ^ a[7]; b[8] = b[6] ^ b[7]; for (i = 0; i < 9; i ++) { bmul(&b[i], &a[i], b[i], a[i]); } c0 = a[0]; c1 = b[0] ^ a[2] ^ a[0] ^ a[1]; c2 = a[1] ^ b[2] ^ b[0] ^ b[1]; c3 = b[1]; d0 = a[3]; d1 = b[3] ^ a[5] ^ a[3] ^ a[4]; d2 = a[4] ^ b[5] ^ b[3] ^ b[4]; d3 = b[4]; e0 = a[6]; e1 = b[6] ^ a[8] ^ a[6] ^ a[7]; e2 = a[7] ^ b[8] ^ b[6] ^ b[7]; e3 = b[7]; e0 ^= c0 ^ d0; e1 ^= c1 ^ d1; e2 ^= c2 ^ d2; e3 ^= c3 ^ d3; c2 ^= e0; c3 ^= e1; d0 ^= e2; d1 ^= e3; /* * GHASH specification has the bits "reversed" (most * significant is in fact least significant), which does * not matter for a carryless multiplication, except that * the 255-bit result must be shifted by 1 bit. */ zw[0] = c0 << 1; zw[1] = (c1 << 1) | (c0 >> 31); zw[2] = (c2 << 1) | (c1 >> 31); zw[3] = (c3 << 1) | (c2 >> 31); zw[4] = (d0 << 1) | (c3 >> 31); zw[5] = (d1 << 1) | (d0 >> 31); zw[6] = (d2 << 1) | (d1 >> 31); zw[7] = (d3 << 1) | (d2 >> 31); /* * We now do the reduction modulo the field polynomial * to get back to 128 bits. */ for (i = 0; i < 4; i ++) { uint32_t lw; lw = zw[i]; zw[i + 4] ^= lw ^ (lw >> 1) ^ (lw >> 2) ^ (lw >> 7); zw[i + 3] ^= (lw << 31) ^ (lw << 30) ^ (lw << 25); } memcpy(yw, zw + 4, sizeof yw); } /* * Encode back the result. */ br_enc32be(yb, yw[3]); br_enc32be(yb + 4, yw[2]); br_enc32be(yb + 8, yw[1]); br_enc32be(yb + 12, yw[0]); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * This implementation uses 32-bit multiplications, and only the low * 32 bits for each multiplication result. This is meant primarily for * the ARM Cortex M0 and M0+, whose multiplication opcode does not yield * the upper 32 bits; but it might also be useful on architectures where * access to the upper 32 bits requires use of specific registers that * create contention (e.g. on i386, "mul" necessarily outputs the result * in edx:eax, while "imul" can use any registers but is limited to the * low 32 bits). * * The implementation trick that is used here is bit-reversing (bit 0 * is swapped with bit 31, bit 1 with bit 30, and so on). In GF(2)[X], * for all values x and y, we have: * rev32(x) * rev32(y) = rev64(x * y) * In other words, if we bit-reverse (over 32 bits) the operands, then we * bit-reverse (over 64 bits) the result. */ /* * Multiplication in GF(2)[X], truncated to its low 32 bits. */ static inline uint32_t bmul32(uint32_t x, uint32_t y) { uint32_t x0, x1, x2, x3; uint32_t y0, y1, y2, y3; uint32_t z0, z1, z2, z3; x0 = x & (uint32_t)0x11111111; x1 = x & (uint32_t)0x22222222; x2 = x & (uint32_t)0x44444444; x3 = x & (uint32_t)0x88888888; y0 = y & (uint32_t)0x11111111; y1 = y & (uint32_t)0x22222222; y2 = y & (uint32_t)0x44444444; y3 = y & (uint32_t)0x88888888; z0 = (x0 * y0) ^ (x1 * y3) ^ (x2 * y2) ^ (x3 * y1); z1 = (x0 * y1) ^ (x1 * y0) ^ (x2 * y3) ^ (x3 * y2); z2 = (x0 * y2) ^ (x1 * y1) ^ (x2 * y0) ^ (x3 * y3); z3 = (x0 * y3) ^ (x1 * y2) ^ (x2 * y1) ^ (x3 * y0); z0 &= (uint32_t)0x11111111; z1 &= (uint32_t)0x22222222; z2 &= (uint32_t)0x44444444; z3 &= (uint32_t)0x88888888; return z0 | z1 | z2 | z3; } /* * Bit-reverse a 32-bit word. */ static uint32_t rev32(uint32_t x) { #define RMS(m, s) do { \ x = ((x & (uint32_t)(m)) << (s)) \ | ((x >> (s)) & (uint32_t)(m)); \ } while (0) RMS(0x55555555, 1); RMS(0x33333333, 2); RMS(0x0F0F0F0F, 4); RMS(0x00FF00FF, 8); return (x << 16) | (x >> 16); #undef RMS } /* see bearssl_hash.h */ void br_ghash_ctmul32(void *y, const void *h, const void *data, size_t len) { /* * This implementation is similar to br_ghash_ctmul() except * that we have to do the multiplication twice, with the * "normal" and "bit reversed" operands. Hence we end up with * eighteen 32-bit multiplications instead of nine. */ const unsigned char *buf, *hb; unsigned char *yb; uint32_t yw[4]; uint32_t hw[4], hwr[4]; buf = (unsigned char*)data; yb = (unsigned char*)y; hb = (const unsigned char*)h; yw[3] = br_dec32be(yb); yw[2] = br_dec32be(yb + 4); yw[1] = br_dec32be(yb + 8); yw[0] = br_dec32be(yb + 12); hw[3] = br_dec32be(hb); hw[2] = br_dec32be(hb + 4); hw[1] = br_dec32be(hb + 8); hw[0] = br_dec32be(hb + 12); hwr[3] = rev32(hw[3]); hwr[2] = rev32(hw[2]); hwr[1] = rev32(hw[1]); hwr[0] = rev32(hw[0]); while (len > 0) { const unsigned char *src; unsigned char tmp[16]; int i; uint32_t a[18], b[18], c[18]; uint32_t d0, d1, d2, d3, d4, d5, d6, d7; uint32_t zw[8]; if (len >= 16) { src = buf; buf += 16; len -= 16; } else { memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); src = tmp; len = 0; } yw[3] ^= br_dec32be(src); yw[2] ^= br_dec32be(src + 4); yw[1] ^= br_dec32be(src + 8); yw[0] ^= br_dec32be(src + 12); /* * We are using Karatsuba: the 128x128 multiplication is * reduced to three 64x64 multiplications, hence nine * 32x32 multiplications. With the bit-reversal trick, * we have to perform 18 32x32 multiplications. */ /* * y[0,1]*h[0,1] -> 0,1,4 * y[2,3]*h[2,3] -> 2,3,5 * (y[0,1]+y[2,3])*(h[0,1]+h[2,3]) -> 6,7,8 */ a[0] = yw[0]; a[1] = yw[1]; a[2] = yw[2]; a[3] = yw[3]; a[4] = a[0] ^ a[1]; a[5] = a[2] ^ a[3]; a[6] = a[0] ^ a[2]; a[7] = a[1] ^ a[3]; a[8] = a[6] ^ a[7]; a[ 9] = rev32(yw[0]); a[10] = rev32(yw[1]); a[11] = rev32(yw[2]); a[12] = rev32(yw[3]); a[13] = a[ 9] ^ a[10]; a[14] = a[11] ^ a[12]; a[15] = a[ 9] ^ a[11]; a[16] = a[10] ^ a[12]; a[17] = a[15] ^ a[16]; b[0] = hw[0]; b[1] = hw[1]; b[2] = hw[2]; b[3] = hw[3]; b[4] = b[0] ^ b[1]; b[5] = b[2] ^ b[3]; b[6] = b[0] ^ b[2]; b[7] = b[1] ^ b[3]; b[8] = b[6] ^ b[7]; b[ 9] = hwr[0]; b[10] = hwr[1]; b[11] = hwr[2]; b[12] = hwr[3]; b[13] = b[ 9] ^ b[10]; b[14] = b[11] ^ b[12]; b[15] = b[ 9] ^ b[11]; b[16] = b[10] ^ b[12]; b[17] = b[15] ^ b[16]; for (i = 0; i < 18; i ++) { c[i] = bmul32(a[i], b[i]); } c[4] ^= c[0] ^ c[1]; c[5] ^= c[2] ^ c[3]; c[8] ^= c[6] ^ c[7]; c[13] ^= c[ 9] ^ c[10]; c[14] ^= c[11] ^ c[12]; c[17] ^= c[15] ^ c[16]; /* * y[0,1]*h[0,1] -> 0,9^4,1^13,10 * y[2,3]*h[2,3] -> 2,11^5,3^14,12 * (y[0,1]+y[2,3])*(h[0,1]+h[2,3]) -> 6,15^8,7^17,16 */ d0 = c[0]; d1 = c[4] ^ (rev32(c[9]) >> 1); d2 = c[1] ^ c[0] ^ c[2] ^ c[6] ^ (rev32(c[13]) >> 1); d3 = c[4] ^ c[5] ^ c[8] ^ (rev32(c[10] ^ c[9] ^ c[11] ^ c[15]) >> 1); d4 = c[2] ^ c[1] ^ c[3] ^ c[7] ^ (rev32(c[13] ^ c[14] ^ c[17]) >> 1); d5 = c[5] ^ (rev32(c[11] ^ c[10] ^ c[12] ^ c[16]) >> 1); d6 = c[3] ^ (rev32(c[14]) >> 1); d7 = rev32(c[12]) >> 1; zw[0] = d0 << 1; zw[1] = (d1 << 1) | (d0 >> 31); zw[2] = (d2 << 1) | (d1 >> 31); zw[3] = (d3 << 1) | (d2 >> 31); zw[4] = (d4 << 1) | (d3 >> 31); zw[5] = (d5 << 1) | (d4 >> 31); zw[6] = (d6 << 1) | (d5 >> 31); zw[7] = (d7 << 1) | (d6 >> 31); for (i = 0; i < 4; i ++) { uint32_t lw; lw = zw[i]; zw[i + 4] ^= lw ^ (lw >> 1) ^ (lw >> 2) ^ (lw >> 7); zw[i + 3] ^= (lw << 31) ^ (lw << 30) ^ (lw << 25); } memcpy(yw, zw + 4, sizeof yw); } br_enc32be(yb, yw[3]); br_enc32be(yb + 4, yw[2]); br_enc32be(yb + 8, yw[1]); br_enc32be(yb + 12, yw[0]); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * This is the 64-bit variant of br_ghash_ctmul32(), with 64-bit operands * and bit reversal of 64-bit words. */ static inline uint64_t bmul64(uint64_t x, uint64_t y) { uint64_t x0, x1, x2, x3; uint64_t y0, y1, y2, y3; uint64_t z0, z1, z2, z3; x0 = x & (uint64_t)0x1111111111111111; x1 = x & (uint64_t)0x2222222222222222; x2 = x & (uint64_t)0x4444444444444444; x3 = x & (uint64_t)0x8888888888888888; y0 = y & (uint64_t)0x1111111111111111; y1 = y & (uint64_t)0x2222222222222222; y2 = y & (uint64_t)0x4444444444444444; y3 = y & (uint64_t)0x8888888888888888; z0 = (x0 * y0) ^ (x1 * y3) ^ (x2 * y2) ^ (x3 * y1); z1 = (x0 * y1) ^ (x1 * y0) ^ (x2 * y3) ^ (x3 * y2); z2 = (x0 * y2) ^ (x1 * y1) ^ (x2 * y0) ^ (x3 * y3); z3 = (x0 * y3) ^ (x1 * y2) ^ (x2 * y1) ^ (x3 * y0); z0 &= (uint64_t)0x1111111111111111; z1 &= (uint64_t)0x2222222222222222; z2 &= (uint64_t)0x4444444444444444; z3 &= (uint64_t)0x8888888888888888; return z0 | z1 | z2 | z3; } static uint64_t rev64(uint64_t x) { #define RMS(m, s) do { \ x = ((x & (uint64_t)(m)) << (s)) \ | ((x >> (s)) & (uint64_t)(m)); \ } while (0) RMS(0x5555555555555555, 1); RMS(0x3333333333333333, 2); RMS(0x0F0F0F0F0F0F0F0F, 4); RMS(0x00FF00FF00FF00FF, 8); RMS(0x0000FFFF0000FFFF, 16); return (x << 32) | (x >> 32); #undef RMS } /* see bearssl_ghash.h */ void br_ghash_ctmul64(void *y, const void *h, const void *data, size_t len) { const unsigned char *buf, *hb; unsigned char *yb; uint64_t y0, y1; uint64_t h0, h1, h2, h0r, h1r, h2r; buf = (unsigned char*)data; yb = (unsigned char*)y; hb = (const unsigned char*)h; y1 = br_dec64be(yb); y0 = br_dec64be(yb + 8); h1 = br_dec64be(hb); h0 = br_dec64be(hb + 8); h0r = rev64(h0); h1r = rev64(h1); h2 = h0 ^ h1; h2r = h0r ^ h1r; while (len > 0) { const unsigned char *src; unsigned char tmp[16]; uint64_t y0r, y1r, y2, y2r; uint64_t z0, z1, z2, z0h, z1h, z2h; uint64_t v0, v1, v2, v3; if (len >= 16) { src = buf; buf += 16; len -= 16; } else { memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); src = tmp; len = 0; } y1 ^= br_dec64be(src); y0 ^= br_dec64be(src + 8); y0r = rev64(y0); y1r = rev64(y1); y2 = y0 ^ y1; y2r = y0r ^ y1r; z0 = bmul64(y0, h0); z1 = bmul64(y1, h1); z2 = bmul64(y2, h2); z0h = bmul64(y0r, h0r); z1h = bmul64(y1r, h1r); z2h = bmul64(y2r, h2r); z2 ^= z0 ^ z1; z2h ^= z0h ^ z1h; z0h = rev64(z0h) >> 1; z1h = rev64(z1h) >> 1; z2h = rev64(z2h) >> 1; v0 = z0; v1 = z0h ^ z2; v2 = z1 ^ z2h; v3 = z1h; v3 = (v3 << 1) | (v2 >> 63); v2 = (v2 << 1) | (v1 >> 63); v1 = (v1 << 1) | (v0 >> 63); v0 = (v0 << 1); v2 ^= v0 ^ (v0 >> 1) ^ (v0 >> 2) ^ (v0 >> 7); v1 ^= (v0 << 63) ^ (v0 << 62) ^ (v0 << 57); v3 ^= v1 ^ (v1 >> 1) ^ (v1 >> 2) ^ (v1 >> 7); v2 ^= (v1 << 63) ^ (v1 << 62) ^ (v1 << 57); y0 = v2; y1 = v3; } br_enc64be(yb, y1); br_enc64be(yb + 8, y0); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 /* * This is the GHASH implementation that leverages the pclmulqdq opcode * (from the AES-NI instructions). */ #if BR_AES_X86NI /* * Test CPU support for PCLMULQDQ. */ static inline int pclmul_supported(void) { /* * Bit mask for features in ECX: * 1 PCLMULQDQ support */ return br_cpuid(0, 0, 0x00000002, 0); } /* see bearssl_hash.h */ br_ghash br_ghash_pclmul_get(void) { return pclmul_supported() ? &br_ghash_pclmul : 0; } BR_TARGETS_X86_UP /* * GHASH is defined over elements of GF(2^128) with "full little-endian" * representation: leftmost byte is least significant, and, within each * byte, leftmost _bit_ is least significant. The natural ordering in * x86 is "mixed little-endian": bytes are ordered from least to most * significant, but bits within a byte are in most-to-least significant * order. Going to full little-endian representation would require * reversing bits within each byte, which is doable but expensive. * * Instead, we go to full big-endian representation, by swapping bytes * around, which is done with a single _mm_shuffle_epi8() opcode (it * comes with SSSE3; all CPU that offer pclmulqdq also have SSSE3). We * can use a full big-endian representation because in a carryless * multiplication, we have a nice bit reversal property: * * rev_128(x) * rev_128(y) = rev_255(x * y) * * So by using full big-endian, we still get the right result, except * that it is right-shifted by 1 bit. The left-shift is relatively * inexpensive, and it can be mutualised. * * * Since SSE2 opcodes do not have facilities for shitfting full 128-bit * values with bit precision, we have to break down values into 64-bit * chunks. We number chunks from 0 to 3 in left to right order. */ /* * Byte-swap a complete 128-bit value. This normally uses * _mm_shuffle_epi8(), which gets translated to pshufb (an SSSE3 opcode). * However, this crashes old Clang versions, so, for Clang before 3.8, * we use an alternate (and less efficient) version. */ #if BR_CLANG && !BR_CLANG_3_8 #define BYTESWAP_DECL #define BYTESWAP_PREP (void)0 #define BYTESWAP(x) do { \ __m128i _src_hash_ghash_pclmul_cbyteswap1, _src_hash_ghash_pclmul_cbyteswap2; \ _src_hash_ghash_pclmul_cbyteswap1 = (x); \ _src_hash_ghash_pclmul_cbyteswap2 = _mm_srli_epi16(_src_hash_ghash_pclmul_cbyteswap1, 8); \ _src_hash_ghash_pclmul_cbyteswap1 = _mm_slli_epi16(_src_hash_ghash_pclmul_cbyteswap1, 8); \ _src_hash_ghash_pclmul_cbyteswap1 = _mm_or_si128(_src_hash_ghash_pclmul_cbyteswap1, _src_hash_ghash_pclmul_cbyteswap2); \ _src_hash_ghash_pclmul_cbyteswap1 = _mm_shufflelo_epi16(_src_hash_ghash_pclmul_cbyteswap1, 0x1B); \ _src_hash_ghash_pclmul_cbyteswap1 = _mm_shufflehi_epi16(_src_hash_ghash_pclmul_cbyteswap1, 0x1B); \ (x) = _mm_shuffle_epi32(_src_hash_ghash_pclmul_cbyteswap1, 0x4E); \ } while (0) #else #define BYTESWAP_DECL __m128i _src_hash_ghash_pclmul_cbyteswap_index; #define BYTESWAP_PREP do { \ _src_hash_ghash_pclmul_cbyteswap_index = _mm_set_epi8( \ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); \ } while (0) #define BYTESWAP(x) do { \ (x) = _mm_shuffle_epi8((x), _src_hash_ghash_pclmul_cbyteswap_index); \ } while (0) #endif /* * Call pclmulqdq. Clang appears to have trouble with the intrinsic, so, * for that compiler, we use inline assembly. Inline assembly is * potentially a bit slower because the compiler does not understand * what the opcode does, and thus cannot optimize instruction * scheduling. * * We use a target of "sse2" only, so that Clang may still handle the * '__m128i' type and allocate SSE2 registers. */ #if BR_CLANG BR_TARGET("sse2") static inline __m128i pclmulqdq00(__m128i x, __m128i y) { __asm__ ("pclmulqdq $0x00, %1, %0" : "+x" (x) : "x" (y)); return x; } BR_TARGET("sse2") static inline __m128i pclmulqdq11(__m128i x, __m128i y) { __asm__ ("pclmulqdq $0x11, %1, %0" : "+x" (x) : "x" (y)); return x; } #else #define pclmulqdq00(x, y) _mm_clmulepi64_si128(x, y, 0x00) #define pclmulqdq11(x, y) _mm_clmulepi64_si128(x, y, 0x11) #endif /* * From a 128-bit value kw, compute kx as the XOR of the two 64-bit * halves of kw (into the right half of kx; left half is unspecified). */ #define BK(kw, kx) do { \ kx = _mm_xor_si128(kw, _mm_shuffle_epi32(kw, 0x0E)); \ } while (0) /* * Combine two 64-bit values (k0:k1) into a 128-bit (kw) value and * the XOR of the two values (kx). */ #define PBK(k0, k1, kw, kx) do { \ kw = _mm_unpacklo_epi64(k1, k0); \ kx = _mm_xor_si128(k0, k1); \ } while (0) /* * Left-shift by 1 bit a 256-bit value (in four 64-bit words). */ #define SL_256(x0, x1, x2, x3) do { \ x0 = _mm_or_si128( \ _mm_slli_epi64(x0, 1), \ _mm_srli_epi64(x1, 63)); \ x1 = _mm_or_si128( \ _mm_slli_epi64(x1, 1), \ _mm_srli_epi64(x2, 63)); \ x2 = _mm_or_si128( \ _mm_slli_epi64(x2, 1), \ _mm_srli_epi64(x3, 63)); \ x3 = _mm_slli_epi64(x3, 1); \ } while (0) /* * Perform reduction in GF(2^128). The 256-bit value is in x0..x3; * result is written in x0..x1. */ #define REDUCE_F128(x0, x1, x2, x3) do { \ x1 = _mm_xor_si128( \ x1, \ _mm_xor_si128( \ _mm_xor_si128( \ x3, \ _mm_srli_epi64(x3, 1)), \ _mm_xor_si128( \ _mm_srli_epi64(x3, 2), \ _mm_srli_epi64(x3, 7)))); \ x2 = _mm_xor_si128( \ _mm_xor_si128( \ x2, \ _mm_slli_epi64(x3, 63)), \ _mm_xor_si128( \ _mm_slli_epi64(x3, 62), \ _mm_slli_epi64(x3, 57))); \ x0 = _mm_xor_si128( \ x0, \ _mm_xor_si128( \ _mm_xor_si128( \ x2, \ _mm_srli_epi64(x2, 1)), \ _mm_xor_si128( \ _mm_srli_epi64(x2, 2), \ _mm_srli_epi64(x2, 7)))); \ x1 = _mm_xor_si128( \ _mm_xor_si128( \ x1, \ _mm_slli_epi64(x2, 63)), \ _mm_xor_si128( \ _mm_slli_epi64(x2, 62), \ _mm_slli_epi64(x2, 57))); \ } while (0) /* * Square value kw into (dw,dx). */ #define SQUARE_F128(kw, dw, dx) do { \ __m128i z0, z1, z2, z3; \ z1 = pclmulqdq11(kw, kw); \ z3 = pclmulqdq00(kw, kw); \ z0 = _mm_shuffle_epi32(z1, 0x0E); \ z2 = _mm_shuffle_epi32(z3, 0x0E); \ SL_256(z0, z1, z2, z3); \ REDUCE_F128(z0, z1, z2, z3); \ PBK(z0, z1, dw, dx); \ } while (0) /* see bearssl_hash.h */ BR_TARGET("ssse3,pclmul") void br_ghash_pclmul(void *y, const void *h, const void *data, size_t len) { const unsigned char *buf1, *buf2; unsigned char tmp[64]; size_t num4, num1; __m128i yw, h1w, h1x; BYTESWAP_DECL /* * We split data into two chunks. First chunk starts at buf1 * and contains num4 blocks of 64-byte values. Second chunk * starts at buf2 and contains num1 blocks of 16-byte values. * We want the first chunk to be as large as possible. */ buf1 = (unsigned char*)data; num4 = len >> 6; len &= 63; buf2 = buf1 + (num4 << 6); num1 = (len + 15) >> 4; if ((len & 15) != 0) { memcpy(tmp, buf2, len); memset(tmp + len, 0, (num1 << 4) - len); buf2 = tmp; } /* * Preparatory step for endian conversions. */ BYTESWAP_PREP; /* * Load y and h. */ yw = _mm_loadu_si128((const __m128i_u*)y); h1w = _mm_loadu_si128((const __m128i_u*)h); BYTESWAP(yw); BYTESWAP(h1w); BK(h1w, h1x); if (num4 > 0) { __m128i h2w, h2x, h3w, h3x, h4w, h4x; __m128i t0, t1, t2, t3; /* * Compute h2 = h^2. */ SQUARE_F128(h1w, h2w, h2x); /* * Compute h3 = h^3 = h*(h^2). */ t1 = pclmulqdq11(h1w, h2w); t3 = pclmulqdq00(h1w, h2w); t2 = _mm_xor_si128(pclmulqdq00(h1x, h2x), _mm_xor_si128(t1, t3)); t0 = _mm_shuffle_epi32(t1, 0x0E); t1 = _mm_xor_si128(t1, _mm_shuffle_epi32(t2, 0x0E)); t2 = _mm_xor_si128(t2, _mm_shuffle_epi32(t3, 0x0E)); SL_256(t0, t1, t2, t3); REDUCE_F128(t0, t1, t2, t3); PBK(t0, t1, h3w, h3x); /* * Compute h4 = h^4 = (h^2)^2. */ SQUARE_F128(h2w, h4w, h4x); while (num4 -- > 0) { __m128i aw0, aw1, aw2, aw3; __m128i ax0, ax1, ax2, ax3; aw0 = _mm_loadu_si128((const __m128i_u*)(buf1 + 0)); aw1 = _mm_loadu_si128((const __m128i_u*)(buf1 + 16)); aw2 = _mm_loadu_si128((const __m128i_u*)(buf1 + 32)); aw3 = _mm_loadu_si128((const __m128i_u*)(buf1 + 48)); BYTESWAP(aw0); BYTESWAP(aw1); BYTESWAP(aw2); BYTESWAP(aw3); buf1 += 64; aw0 = _mm_xor_si128(aw0, yw); BK(aw1, ax1); BK(aw2, ax2); BK(aw3, ax3); BK(aw0, ax0); t1 = _mm_xor_si128( _mm_xor_si128( pclmulqdq11(aw0, h4w), pclmulqdq11(aw1, h3w)), _mm_xor_si128( pclmulqdq11(aw2, h2w), pclmulqdq11(aw3, h1w))); t3 = _mm_xor_si128( _mm_xor_si128( pclmulqdq00(aw0, h4w), pclmulqdq00(aw1, h3w)), _mm_xor_si128( pclmulqdq00(aw2, h2w), pclmulqdq00(aw3, h1w))); t2 = _mm_xor_si128( _mm_xor_si128( pclmulqdq00(ax0, h4x), pclmulqdq00(ax1, h3x)), _mm_xor_si128( pclmulqdq00(ax2, h2x), pclmulqdq00(ax3, h1x))); t2 = _mm_xor_si128(t2, _mm_xor_si128(t1, t3)); t0 = _mm_shuffle_epi32(t1, 0x0E); t1 = _mm_xor_si128(t1, _mm_shuffle_epi32(t2, 0x0E)); t2 = _mm_xor_si128(t2, _mm_shuffle_epi32(t3, 0x0E)); SL_256(t0, t1, t2, t3); REDUCE_F128(t0, t1, t2, t3); yw = _mm_unpacklo_epi64(t1, t0); } } while (num1 -- > 0) { __m128i aw, ax; __m128i t0, t1, t2, t3; aw = _mm_loadu_si128((const __m128i_u*)buf2); BYTESWAP(aw); buf2 += 16; aw = _mm_xor_si128(aw, yw); BK(aw, ax); t1 = pclmulqdq11(aw, h1w); t3 = pclmulqdq00(aw, h1w); t2 = pclmulqdq00(ax, h1x); t2 = _mm_xor_si128(t2, _mm_xor_si128(t1, t3)); t0 = _mm_shuffle_epi32(t1, 0x0E); t1 = _mm_xor_si128(t1, _mm_shuffle_epi32(t2, 0x0E)); t2 = _mm_xor_si128(t2, _mm_shuffle_epi32(t3, 0x0E)); SL_256(t0, t1, t2, t3); REDUCE_F128(t0, t1, t2, t3); yw = _mm_unpacklo_epi64(t1, t0); } BYTESWAP(yw); _mm_storeu_si128((__m128i_u*)y, yw); } BR_TARGETS_X86_DOWN #else /* see bearssl_hash.h */ br_ghash br_ghash_pclmul_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 /* * This is the GHASH implementation that leverages the POWER8 opcodes. */ #if BR_POWER8 /* * Some symbolic names for registers. * HB0 = 16 bytes of value 0 * HB1 = 16 bytes of value 1 * HB2 = 16 bytes of value 2 * HB6 = 16 bytes of value 6 * HB7 = 16 bytes of value 7 * TT0, TT1 and TT2 are temporaries * * BSW holds the pattern for _src_hash_ghash_pwr8_cbyteswapping 32-bit words; this is set only * on little-endian systems. XBSW is the same register with the +32 offset * for access with the VSX opcodes. */ #define HB0 0 #define HB1 1 #define HB2 2 #define HB6 3 #define HB7 4 #define TT0 5 #define TT1 6 #define TT2 7 #define BSW 8 #define XBSW 40 /* * Macro to initialise the constants. */ #define INIT \ vxor(HB0, HB0, HB0) \ vspltisb(HB1, 1) \ vspltisb(HB2, 2) \ vspltisb(HB6, 6) \ vspltisb(HB7, 7) \ INIT_BSW /* * Fix endianness of a value after reading it or before writing it, if * necessary. */ #if BR_POWER8_LE #define INIT_BSW lxvw4x(XBSW, 0, %[idx2be]) #define FIX_ENDIAN(xx) vperm(xx, xx, xx, BSW) #else #define INIT_BSW #define FIX_ENDIAN(xx) #endif /* * Left-shift x0:x1 by one bit to the left. This is a corrective action * needed because GHASH is defined in full little-endian specification, * while the opcodes use full big-endian convention, so the 255-bit product * ends up one bit to the right. */ #define SL_256(x0, x1) \ vsldoi(TT0, HB0, x1, 1) \ vsl(x0, x0, HB1) \ vsr(TT0, TT0, HB7) \ vsl(x1, x1, HB1) \ vxor(x0, x0, TT0) /* * Reduce x0:x1 in GF(2^128), result in xd (register xd may be the same as * x0 or x1, or a different register). x0 and x1 are modified. */ #define REDUCE_F128(xd, x0, x1) \ vxor(x0, x0, x1) \ vsr(TT0, x1, HB1) \ vsr(TT1, x1, HB2) \ vsr(TT2, x1, HB7) \ vxor(x0, x0, TT0) \ vxor(TT1, TT1, TT2) \ vxor(x0, x0, TT1) \ vsldoi(x1, x1, HB0, 15) \ vsl(TT1, x1, HB6) \ vsl(TT2, x1, HB1) \ vxor(x1, TT1, TT2) \ vsr(TT0, x1, HB1) \ vsr(TT1, x1, HB2) \ vsr(TT2, x1, HB7) \ vxor(x0, x0, x1) \ vxor(x0, x0, TT0) \ vxor(TT1, TT1, TT2) \ vxor(xd, x0, TT1) /* see bearssl_hash.h */ void br_ghash_pwr8(void *y, const void *h, const void *data, size_t len) { const unsigned char *buf1, *buf2; size_t num4, num1; unsigned char tmp[64]; long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif buf1 = (unsigned char*)data; /* * Assembly code requires data into two chunks; first chunk * must contain a number of blocks which is a multiple of 4. * Since the processing for the first chunk is faster, we want * to make it as big as possible. * * For the remainder, there are two possibilities: * -- if the remainder size is a multiple of 16, then use it * in place; * -- otherwise, copy it to the tmp[] array and pad it with * zeros. */ num4 = len >> 6; buf2 = buf1 + (num4 << 6); len &= 63; num1 = (len + 15) >> 4; if ((len & 15) != 0) { memcpy(tmp, buf2, len); memset(tmp + len, 0, (num1 << 4) - len); buf2 = tmp; } cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( INIT /* * Load current h (denoted hereafter h1) in v9. */ lxvw4x(41, 0, %[h]) FIX_ENDIAN(9) /* * Load current y into v28. */ lxvw4x(60, 0, %[y]) FIX_ENDIAN(28) /* * Split h1 into three registers: * v17 = h1_1:h1_0 * v18 = 0:h1_0 * v19 = h1_1:0 */ xxpermdi(49, 41, 41, 2) vsldoi(18, HB0, 9, 8) vsldoi(19, 9, HB0, 8) /* * If num4 is 0, skip directly to the second chunk. */ cmpldi(%[num4], 0) beq(chunk1) /* * Compute h2 = h*h in v10. */ vpmsumd(10, 18, 18) vpmsumd(11, 19, 19) SL_256(10, 11) REDUCE_F128(10, 10, 11) /* * Compute h3 = h*h*h in v11. * We first split h2 into: * v10 = h2_0:h2_1 * v11 = 0:h2_0 * v12 = h2_1:0 * Then we do the product with h1, and reduce into v11. */ vsldoi(11, HB0, 10, 8) vsldoi(12, 10, HB0, 8) vpmsumd(13, 10, 17) vpmsumd(11, 11, 18) vpmsumd(12, 12, 19) vsldoi(14, HB0, 13, 8) vsldoi(15, 13, HB0, 8) vxor(11, 11, 14) vxor(12, 12, 15) SL_256(11, 12) REDUCE_F128(11, 11, 12) /* * Compute h4 = h*h*h*h in v12. This is done by squaring h2. */ vsldoi(12, HB0, 10, 8) vsldoi(13, 10, HB0, 8) vpmsumd(12, 12, 12) vpmsumd(13, 13, 13) SL_256(12, 13) REDUCE_F128(12, 12, 13) /* * Repack h1, h2, h3 and h4: * v13 = h4_0:h3_0 * v14 = h4_1:h3_1 * v15 = h2_0:h1_0 * v16 = h2_1:h1_1 */ xxpermdi(45, 44, 43, 0) xxpermdi(46, 44, 43, 3) xxpermdi(47, 42, 41, 0) xxpermdi(48, 42, 41, 3) /* * Loop for each group of four blocks. */ mtctr(%[num4]) label(loop4) /* * Read the four next blocks. * v20 = y + a0 = b0 * v21 = a1 = b1 * v22 = a2 = b2 * v23 = a3 = b3 */ lxvw4x(52, %[cc0], %[buf1]) lxvw4x(53, %[cc1], %[buf1]) lxvw4x(54, %[cc2], %[buf1]) lxvw4x(55, %[cc3], %[buf1]) FIX_ENDIAN(20) FIX_ENDIAN(21) FIX_ENDIAN(22) FIX_ENDIAN(23) addi(%[buf1], %[buf1], 64) vxor(20, 20, 28) /* * Repack the blocks into v9, v10, v11 and v12. * v9 = b0_0:b1_0 * v10 = b0_1:b1_1 * v11 = b2_0:b3_0 * v12 = b2_1:b3_1 */ xxpermdi(41, 52, 53, 0) xxpermdi(42, 52, 53, 3) xxpermdi(43, 54, 55, 0) xxpermdi(44, 54, 55, 3) /* * Compute the products. * v20 = b0_0*h4_0 + b1_0*h3_0 * v21 = b0_1*h4_0 + b1_1*h3_0 * v22 = b0_0*h4_1 + b1_0*h3_1 * v23 = b0_1*h4_1 + b1_1*h3_1 * v24 = b2_0*h2_0 + b3_0*h1_0 * v25 = b2_1*h2_0 + b3_1*h1_0 * v26 = b2_0*h2_1 + b3_0*h1_1 * v27 = b2_1*h2_1 + b3_1*h1_1 */ vpmsumd(20, 13, 9) vpmsumd(21, 13, 10) vpmsumd(22, 14, 9) vpmsumd(23, 14, 10) vpmsumd(24, 15, 11) vpmsumd(25, 15, 12) vpmsumd(26, 16, 11) vpmsumd(27, 16, 12) /* * Sum products into a single 256-bit result in v11:v12. */ vxor(11, 20, 24) vxor(12, 23, 27) vxor( 9, 21, 22) vxor(10, 25, 26) vxor(20, 9, 10) vsldoi( 9, HB0, 20, 8) vsldoi(10, 20, HB0, 8) vxor(11, 11, 9) vxor(12, 12, 10) /* * Fix and reduce in GF(2^128); this is the new y (in v28). */ SL_256(11, 12) REDUCE_F128(28, 11, 12) /* * Loop for next group of four blocks. */ bdnz(loop4) /* * Process second chunk, one block at a time. */ label(chunk1) cmpldi(%[num1], 0) beq(done) mtctr(%[num1]) label(loop1) /* * Load next data block and XOR it into y. */ lxvw4x(41, 0, %[buf2]) #if BR_POWER8_LE FIX_ENDIAN(9) #endif addi(%[buf2], %[buf2], 16) vxor(9, 28, 9) /* * Split y into doublewords: * v9 = y_0:y_1 * v10 = 0:y_0 * v11 = y_1:0 */ vsldoi(10, HB0, 9, 8) vsldoi(11, 9, HB0, 8) /* * Compute products with h: * v12 = y_0 * h_0 * v13 = y_1 * h_1 * v14 = y_1 * h_0 + y_0 * h_1 */ vpmsumd(14, 9, 17) vpmsumd(12, 10, 18) vpmsumd(13, 11, 19) /* * Propagate v14 into v12:v13 to finalise product. */ vsldoi(10, HB0, 14, 8) vsldoi(11, 14, HB0, 8) vxor(12, 12, 10) vxor(13, 13, 11) /* * Fix result and reduce into v28 (next value for y). */ SL_256(12, 13) REDUCE_F128(28, 12, 13) bdnz(loop1) label(done) /* * Write back the new y. */ FIX_ENDIAN(28) stxvw4x(60, 0, %[y]) : [buf1] "+b" (buf1), [buf2] "+b" (buf2) : [y] "b" (y), [h] "b" (h), [num4] "b" (num4), [num1] "b" (num1), [cc0] "b" (cc0), [cc1] "b" (cc1), [cc2] "b" (cc2), [cc3] "b" (cc3) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } /* see bearssl_hash.h */ br_ghash br_ghash_pwr8_get(void) { return &br_ghash_pwr8; } #else /* see bearssl_hash.h */ br_ghash br_ghash_pwr8_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_hash_md5_cF(B, C, D) ((((C) ^ (D)) & (B)) ^ (D)) #define _src_hash_md5_cG(B, C, D) ((((C) ^ (B)) & (D)) ^ (C)) #define _src_hash_md5_cH(B, C, D) ((B) ^ (C) ^ (D)) #define _src_hash_md5_cI(B, C, D) ((C) ^ ((B) | ~(D))) #define _src_hash_md5_cROTL(x, n) (((x) << (n)) | ((x) >> (32 - (n)))) /* see inner.h */ const uint32_t br_md5_IV[4] = { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476 }; static const uint32_t _src_hash_md5_cK[64] = { 0xD76AA478, 0xE8C7B756, 0x242070DB, 0xC1BDCEEE, 0xF57C0FAF, 0x4787C62A, 0xA8304613, 0xFD469501, 0x698098D8, 0x8B44F7AF, 0xFFFF5BB1, 0x895CD7BE, 0x6B901122, 0xFD987193, 0xA679438E, 0x49B40821, 0xF61E2562, 0xC040B340, 0x265E5A51, 0xE9B6C7AA, 0xD62F105D, 0x02441453, 0xD8A1E681, 0xE7D3FBC8, 0x21E1CDE6, 0xC33707D6, 0xF4D50D87, 0x455A14ED, 0xA9E3E905, 0xFCEFA3F8, 0x676F02D9, 0x8D2A4C8A, 0xFFFA3942, 0x8771F681, 0x6D9D6122, 0xFDE5380C, 0xA4BEEA44, 0x4BDECFA9, 0xF6BB4B60, 0xBEBFBC70, 0x289B7EC6, 0xEAA127FA, 0xD4EF3085, 0x04881D05, 0xD9D4D039, 0xE6DB99E5, 0x1FA27CF8, 0xC4AC5665, 0xF4292244, 0x432AFF97, 0xAB9423A7, 0xFC93A039, 0x655B59C3, 0x8F0CCC92, 0xFFEFF47D, 0x85845DD1, 0x6FA87E4F, 0xFE2CE6E0, 0xA3014314, 0x4E0811A1, 0xF7537E82, 0xBD3AF235, 0x2AD7D2BB, 0xEB86D391 }; static const unsigned char MP[48] = { 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 }; /* see inner.h */ void br_md5_round(const unsigned char *buf, uint32_t *val) { uint32_t m[16]; uint32_t a, b, c, d; int i; a = val[0]; b = val[1]; c = val[2]; d = val[3]; /* obsolete for (i = 0; i < 16; i ++) { m[i] = br_dec32le(buf + (i << 2)); } */ br_range_dec32le(m, 16, buf); for (i = 0; i < 16; i += 4) { a = b + _src_hash_md5_cROTL(a + _src_hash_md5_cF(b, c, d) + m[i + 0] + _src_hash_md5_cK[i + 0], 7); d = a + _src_hash_md5_cROTL(d + _src_hash_md5_cF(a, b, c) + m[i + 1] + _src_hash_md5_cK[i + 1], 12); c = d + _src_hash_md5_cROTL(c + _src_hash_md5_cF(d, a, b) + m[i + 2] + _src_hash_md5_cK[i + 2], 17); b = c + _src_hash_md5_cROTL(b + _src_hash_md5_cF(c, d, a) + m[i + 3] + _src_hash_md5_cK[i + 3], 22); } for (i = 16; i < 32; i += 4) { a = b + _src_hash_md5_cROTL(a + _src_hash_md5_cG(b, c, d) + m[MP[i - 16]] + _src_hash_md5_cK[i + 0], 5); d = a + _src_hash_md5_cROTL(d +_src_hash_md5_cG(a, b, c) + m[MP[i - 15]] + _src_hash_md5_cK[i + 1], 9); c = d + _src_hash_md5_cROTL(c + _src_hash_md5_cG(d, a, b) + m[MP[i - 14]] + _src_hash_md5_cK[i + 2], 14); b = c + _src_hash_md5_cROTL(b + _src_hash_md5_cG(c, d, a) + m[MP[i - 13]] + _src_hash_md5_cK[i + 3], 20); } for (i = 32; i < 48; i += 4) { a = b + _src_hash_md5_cROTL(a + _src_hash_md5_cH(b, c, d) + m[MP[i - 16]] + _src_hash_md5_cK[i + 0], 4); d = a + _src_hash_md5_cROTL(d + _src_hash_md5_cH(a, b, c) + m[MP[i - 15]] + _src_hash_md5_cK[i + 1], 11); c = d +_src_hash_md5_cROTL(c + _src_hash_md5_cH(d, a, b) + m[MP[i - 14]] + _src_hash_md5_cK[i + 2], 16); b = c + _src_hash_md5_cROTL(b + _src_hash_md5_cH(c, d, a) + m[MP[i - 13]] + _src_hash_md5_cK[i + 3], 23); } for (i = 48; i < 64; i += 4) { a = b + _src_hash_md5_cROTL(a + _src_hash_md5_cI(b, c, d) + m[MP[i - 16]] + _src_hash_md5_cK[i + 0], 6); d = a + _src_hash_md5_cROTL(d + _src_hash_md5_cI(a, b, c) + m[MP[i - 15]] + _src_hash_md5_cK[i + 1], 10); c = d + _src_hash_md5_cROTL(c + _src_hash_md5_cI(d, a, b) + m[MP[i - 14]] + _src_hash_md5_cK[i + 2], 15); b = c + _src_hash_md5_cROTL(b + _src_hash_md5_cI(c, d, a) + m[MP[i - 13]] + _src_hash_md5_cK[i + 3], 21); } val[0] += a; val[1] += b; val[2] += c; val[3] += d; } /* see bearssl.h */ void br_md5_init(br_md5_context *cc) { cc->vtable = &br_md5_vtable; memcpy(cc->val, br_md5_IV, sizeof cc->val); cc->count = 0; } /* see bearssl.h */ void br_md5_update(br_md5_context *cc, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)cc->count & 63; while (len > 0) { size_t clen; clen = 64 - ptr; if (clen > len) { clen = len; } memcpy(cc->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; cc->count += (uint64_t)clen; if (ptr == 64) { br_md5_round(cc->buf, cc->val); ptr = 0; } } } /* see bearssl.h */ void br_md5_out(const br_md5_context *cc, void *dst) { unsigned char buf[64]; uint32_t val[4]; size_t ptr; ptr = (size_t)cc->count & 63; memcpy(buf, cc->buf, ptr); memcpy(val, cc->val, sizeof val); buf[ptr ++] = 0x80; if (ptr > 56) { memset(buf + ptr, 0, 64 - ptr); br_md5_round(buf, val); memset(buf, 0, 56); } else { memset(buf + ptr, 0, 56 - ptr); } br_enc64le(buf + 56, cc->count << 3); br_md5_round(buf, val); br_range_enc32le(dst, val, 4); } /* see bearssl.h */ uint64_t br_md5_state(const br_md5_context *cc, void *dst) { br_range_enc32le(dst, cc->val, 4); return cc->count; } /* see bearssl.h */ void br_md5_set_state(br_md5_context *cc, const void *stb, uint64_t count) { br_range_dec32le(cc->val, 4, stb); cc->count = count; } /* see bearssl.h */ const br_hash_class br_md5_vtable = { sizeof(br_md5_context), BR_HASHDESC_ID(br_md5_ID) | BR_HASHDESC_OUT(16) | BR_HASHDESC_STATE(16) | BR_HASHDESC_LBLEN(6) | BR_HASHDESC_MD_PADDING, (void (*)(const br_hash_class **))&br_md5_init, (void (*)(const br_hash_class **, const void *, size_t))&br_md5_update, (void (*)(const br_hash_class *const *, void *))&br_md5_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_md5_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_md5_set_state }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl.h */ void br_md5sha1_init(br_md5sha1_context *cc) { cc->vtable = &br_md5sha1_vtable; memcpy(cc->val_md5, br_md5_IV, sizeof cc->val_md5); memcpy(cc->val_sha1, br_sha1_IV, sizeof cc->val_sha1); cc->count = 0; } /* see bearssl.h */ void br_md5sha1_update(br_md5sha1_context *cc, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)cc->count & 63; while (len > 0) { size_t clen; clen = 64 - ptr; if (clen > len) { clen = len; } memcpy(cc->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; cc->count += (uint64_t)clen; if (ptr == 64) { br_md5_round(cc->buf, cc->val_md5); br_sha1_round(cc->buf, cc->val_sha1); ptr = 0; } } } /* see bearssl.h */ void br_md5sha1_out(const br_md5sha1_context *cc, void *dst) { unsigned char buf[64]; uint32_t val_md5[4]; uint32_t val_sha1[5]; size_t ptr; unsigned char *out; uint64_t count; count = cc->count; ptr = (size_t)count & 63; memcpy(buf, cc->buf, ptr); memcpy(val_md5, cc->val_md5, sizeof val_md5); memcpy(val_sha1, cc->val_sha1, sizeof val_sha1); buf[ptr ++] = 0x80; if (ptr > 56) { memset(buf + ptr, 0, 64 - ptr); br_md5_round(buf, val_md5); br_sha1_round(buf, val_sha1); memset(buf, 0, 56); } else { memset(buf + ptr, 0, 56 - ptr); } count <<= 3; br_enc64le(buf + 56, count); br_md5_round(buf, val_md5); br_enc64be(buf + 56, count); br_sha1_round(buf, val_sha1); out = (unsigned char*)dst; br_range_enc32le(out, val_md5, 4); br_range_enc32be(out + 16, val_sha1, 5); } /* see bearssl.h */ uint64_t br_md5sha1_state(const br_md5sha1_context *cc, void *dst) { unsigned char *out; out = (unsigned char*)dst; br_range_enc32le(out, cc->val_md5, 4); br_range_enc32be(out + 16, cc->val_sha1, 5); return cc->count; } /* see bearssl.h */ void br_md5sha1_set_state(br_md5sha1_context *cc, const void *stb, uint64_t count) { const unsigned char *buf; buf = (unsigned char*)stb; br_range_dec32le(cc->val_md5, 4, buf); br_range_dec32be(cc->val_sha1, 5, buf + 16); cc->count = count; } /* see bearssl.h */ const br_hash_class br_md5sha1_vtable = { sizeof(br_md5sha1_context), BR_HASHDESC_ID(br_md5sha1_ID) | BR_HASHDESC_OUT(36) | BR_HASHDESC_STATE(36) | BR_HASHDESC_LBLEN(6), (void (*)(const br_hash_class **))&br_md5sha1_init, (void (*)(const br_hash_class **, const void *, size_t)) &br_md5sha1_update, (void (*)(const br_hash_class *const *, void *)) &br_md5sha1_out, (uint64_t (*)(const br_hash_class *const *, void *)) &br_md5sha1_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_md5sha1_set_state }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_mgf1_xor(void *data, size_t len, const br_hash_class *dig, const void *seed, size_t seed_len) { unsigned char *buf; size_t u, hlen; uint32_t c; buf = (unsigned char*)data; hlen = br_digest_size(dig); for (u = 0, c = 0; u < len; u += hlen, c ++) { br_hash_compat_context hc; unsigned char tmp[64]; size_t v; hc.vtable = dig; dig->init(&hc.vtable); dig->update(&hc.vtable, seed, seed_len); br_enc32be(tmp, c); dig->update(&hc.vtable, tmp, 4); dig->out(&hc.vtable, tmp); for (v = 0; v < hlen; v ++) { if ((u + v) >= len) { break; } buf[u + v] ^= tmp[v]; } } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * An aggregate context that is large enough for all supported hash * functions. */ typedef union { const br_hash_class *vtable; br_md5_context md5; br_sha1_context sha1; br_sha224_context sha224; br_sha256_context sha256; br_sha384_context sha384; br_sha512_context sha512; } gen_hash_context; /* * Get the offset to the state for a specific hash function within the * context structure. This shall be called only for the supported hash * functions, */ static size_t get_state_offset(int id) { if (id >= 5) { /* * SHA-384 has id 5, and SHA-512 has id 6. Both use * eight 64-bit words for their state. */ return offsetof(br_multihash_context, val_64) + ((size_t)(id - 5) * (8 * sizeof(uint64_t))); } else { /* * MD5 has id 1, SHA-1 has id 2, SHA-224 has id 3 and * SHA-256 has id 4. They use 32-bit words for their * states (4 words for MD5, 5 for SHA-1, 8 for SHA-224 * and 8 for SHA-256). */ unsigned x; x = id - 1; x = ((x + (x & (x >> 1))) << 2) + (x >> 1); return offsetof(br_multihash_context, val_32) + x * sizeof(uint32_t); } } /* see bearssl_hash.h */ void br_multihash_zero(br_multihash_context *ctx) { /* * This is not standard, but yields very short and efficient code, * and it works "everywhere". */ memset(ctx, 0, sizeof *ctx); } /* see bearssl_hash.h */ void br_multihash_init(br_multihash_context *ctx) { int i; ctx->count = 0; for (i = 1; i <= 6; i ++) { const br_hash_class *hc; hc = ctx->impl[i - 1]; if (hc != NULL) { gen_hash_context g; hc->init(&g.vtable); hc->state(&g.vtable, (unsigned char *)ctx + get_state_offset(i)); } } } /* see bearssl_hash.h */ void br_multihash_update(br_multihash_context *ctx, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)ctx->count & 127; while (len > 0) { size_t clen; clen = 128 - ptr; if (clen > len) { clen = len; } memcpy(ctx->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; ctx->count += (uint64_t)clen; if (ptr == 128) { int i; for (i = 1; i <= 6; i ++) { const br_hash_class *hc; hc = ctx->impl[i - 1]; if (hc != NULL) { gen_hash_context g; unsigned char *state; state = (unsigned char *)ctx + get_state_offset(i); hc->set_state(&g.vtable, state, ctx->count - 128); hc->update(&g.vtable, ctx->buf, 128); hc->state(&g.vtable, state); } } ptr = 0; } } } /* see bearssl_hash.h */ size_t br_multihash_out(const br_multihash_context *ctx, int id, void *dst) { const br_hash_class *hc; gen_hash_context g; const unsigned char *state; hc = ctx->impl[id - 1]; if (hc == NULL) { return 0; } state = (const unsigned char *)ctx + get_state_offset(id); hc->set_state(&g.vtable, state, ctx->count & ~(uint64_t)127); hc->update(&g.vtable, ctx->buf, ctx->count & (uint64_t)127); hc->out(&g.vtable, dst); return (hc->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_hash_sha1_cF(B, C, D) ((((C) ^ (D)) & (B)) ^ (D)) #define _src_hash_sha1_cG(B, C, D) ((B) ^ (C) ^ (D)) #define _src_hash_sha1_cH(B, C, D) (((D) & (C)) | (((D) | (C)) & (B))) #define _src_hash_sha1_cI(B, C, D) _src_hash_sha1_cG(B, C, D) #define _src_hash_sha1_cROTL(x, n) (((x) << (n)) | ((x) >> (32 - (n)))) #define K1 ((uint32_t)0x5A827999) #define K2 ((uint32_t)0x6ED9EBA1) #define K3 ((uint32_t)0x8F1BBCDC) #define K4 ((uint32_t)0xCA62C1D6) /* see inner.h */ const uint32_t br_sha1_IV[5] = { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 }; /* see inner.h */ void br_sha1_round(const unsigned char *buf, uint32_t *val) { uint32_t m[80]; uint32_t a, b, c, d, e; int i; a = val[0]; b = val[1]; c = val[2]; d = val[3]; e = val[4]; br_range_dec32be(m, 16, buf); for (i = 16; i < 80; i ++) { uint32_t x = m[i - 3] ^ m[i - 8] ^ m[i - 14] ^ m[i - 16]; m[i] = _src_hash_sha1_cROTL(x, 1); } for (i = 0; i < 20; i += 5) { e += _src_hash_sha1_cROTL(a, 5) + _src_hash_sha1_cF(b, c, d) + K1 + m[i + 0]; b = _src_hash_sha1_cROTL(b, 30); d += _src_hash_sha1_cROTL(e, 5) + _src_hash_sha1_cF(a, b, c) + K1 + m[i + 1]; a = _src_hash_sha1_cROTL(a, 30); c += _src_hash_sha1_cROTL(d, 5) + _src_hash_sha1_cF(e, a, b) + K1 + m[i + 2]; e = _src_hash_sha1_cROTL(e, 30); b += _src_hash_sha1_cROTL(c, 5) + _src_hash_sha1_cF(d, e, a) + K1 + m[i + 3]; d = _src_hash_sha1_cROTL(d, 30); a += _src_hash_sha1_cROTL(b, 5) + _src_hash_sha1_cF(c, d, e) + K1 + m[i + 4]; c = _src_hash_sha1_cROTL(c, 30); } for (i = 20; i < 40; i += 5) { e += _src_hash_sha1_cROTL(a, 5) + _src_hash_sha1_cG(b, c, d) + K2 + m[i + 0]; b = _src_hash_sha1_cROTL(b, 30); d += _src_hash_sha1_cROTL(e, 5) + _src_hash_sha1_cG(a, b, c) + K2 + m[i + 1]; a = _src_hash_sha1_cROTL(a, 30); c += _src_hash_sha1_cROTL(d, 5) + _src_hash_sha1_cG(e, a, b) + K2 + m[i + 2]; e = _src_hash_sha1_cROTL(e, 30); b += _src_hash_sha1_cROTL(c, 5) + _src_hash_sha1_cG(d, e, a) + K2 + m[i + 3]; d = _src_hash_sha1_cROTL(d, 30); a += _src_hash_sha1_cROTL(b, 5) + _src_hash_sha1_cG(c, d, e) + K2 + m[i + 4]; c = _src_hash_sha1_cROTL(c, 30); } for (i = 40; i < 60; i += 5) { e += _src_hash_sha1_cROTL(a, 5) + _src_hash_sha1_cH(b, c, d) + K3 + m[i + 0]; b = _src_hash_sha1_cROTL(b, 30); d += _src_hash_sha1_cROTL(e, 5) + _src_hash_sha1_cH(a, b, c) + K3 + m[i + 1]; a = _src_hash_sha1_cROTL(a, 30); c += _src_hash_sha1_cROTL(d, 5) + _src_hash_sha1_cH(e, a, b) + K3 + m[i + 2]; e = _src_hash_sha1_cROTL(e, 30); b += _src_hash_sha1_cROTL(c, 5) + _src_hash_sha1_cH(d, e, a) + K3 + m[i + 3]; d = _src_hash_sha1_cROTL(d, 30); a += _src_hash_sha1_cROTL(b, 5) + _src_hash_sha1_cH(c, d, e) + K3 + m[i + 4]; c = _src_hash_sha1_cROTL(c, 30); } for (i = 60; i < 80; i += 5) { e += _src_hash_sha1_cROTL(a, 5) + _src_hash_sha1_cI(b, c, d) + K4 + m[i + 0]; b = _src_hash_sha1_cROTL(b, 30); d += _src_hash_sha1_cROTL(e, 5) + _src_hash_sha1_cI(a, b, c) + K4 + m[i + 1]; a = _src_hash_sha1_cROTL(a, 30); c += _src_hash_sha1_cROTL(d, 5) + _src_hash_sha1_cI(e, a, b) + K4 + m[i + 2]; e = _src_hash_sha1_cROTL(e, 30); b += _src_hash_sha1_cROTL(c, 5) + _src_hash_sha1_cI(d, e, a) + K4 + m[i + 3]; d = _src_hash_sha1_cROTL(d, 30); a += _src_hash_sha1_cROTL(b, 5) + _src_hash_sha1_cI(c, d, e) + K4 + m[i + 4]; c = _src_hash_sha1_cROTL(c, 30); } val[0] += a; val[1] += b; val[2] += c; val[3] += d; val[4] += e; } /* see bearssl.h */ void br_sha1_init(br_sha1_context *cc) { cc->vtable = &br_sha1_vtable; memcpy(cc->val, br_sha1_IV, sizeof cc->val); cc->count = 0; } /* see bearssl.h */ void br_sha1_update(br_sha1_context *cc, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)cc->count & 63; while (len > 0) { size_t clen; clen = 64 - ptr; if (clen > len) { clen = len; } memcpy(cc->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; cc->count += (uint64_t)clen; if (ptr == 64) { br_sha1_round(cc->buf, cc->val); ptr = 0; } } } /* see bearssl.h */ void br_sha1_out(const br_sha1_context *cc, void *dst) { unsigned char buf[64]; uint32_t val[5]; size_t ptr; ptr = (size_t)cc->count & 63; memcpy(buf, cc->buf, ptr); memcpy(val, cc->val, sizeof val); buf[ptr ++] = 0x80; if (ptr > 56) { memset(buf + ptr, 0, 64 - ptr); br_sha1_round(buf, val); memset(buf, 0, 56); } else { memset(buf + ptr, 0, 56 - ptr); } br_enc64be(buf + 56, cc->count << 3); br_sha1_round(buf, val); br_range_enc32be(dst, val, 5); } /* see bearssl.h */ uint64_t br_sha1_state(const br_sha1_context *cc, void *dst) { br_range_enc32be(dst, cc->val, 5); return cc->count; } /* see bearssl.h */ void br_sha1_set_state(br_sha1_context *cc, const void *stb, uint64_t count) { br_range_dec32be(cc->val, 5, stb); cc->count = count; } /* see bearssl.h */ const br_hash_class br_sha1_vtable = { sizeof(br_sha1_context), BR_HASHDESC_ID(br_sha1_ID) | BR_HASHDESC_OUT(20) | BR_HASHDESC_STATE(20) | BR_HASHDESC_LBLEN(6) | BR_HASHDESC_MD_PADDING | BR_HASHDESC_MD_PADDING_BE, (void (*)(const br_hash_class **))&br_sha1_init, (void (*)(const br_hash_class **, const void *, size_t))&br_sha1_update, (void (*)(const br_hash_class *const *, void *))&br_sha1_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_sha1_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_sha1_set_state }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define CH(X, Y, Z) ((((Y) ^ (Z)) & (X)) ^ (Z)) #define MAJ(X, Y, Z) (((Y) & (Z)) | (((Y) | (Z)) & (X))) #define _src_hash_sha2big_cROTR(x, n) (((uint64_t)(x) << (64 - (n))) | ((uint64_t)(x) >> (n))) #define BSG5_0(x) (_src_hash_sha2big_cROTR(x, 28) ^ _src_hash_sha2big_cROTR(x, 34) ^ _src_hash_sha2big_cROTR(x, 39)) #define BSG5_1(x) (_src_hash_sha2big_cROTR(x, 14) ^ _src_hash_sha2big_cROTR(x, 18) ^ _src_hash_sha2big_cROTR(x, 41)) #define SSG5_0(x) (_src_hash_sha2big_cROTR(x, 1) ^ _src_hash_sha2big_cROTR(x, 8) ^ (uint64_t)((x) >> 7)) #define SSG5_1(x) (_src_hash_sha2big_cROTR(x, 19) ^ _src_hash_sha2big_cROTR(x, 61) ^ (uint64_t)((x) >> 6)) static const uint64_t IV384[8] = { 0xCBBB9D5DC1059ED8, 0x629A292A367CD507, 0x9159015A3070DD17, 0x152FECD8F70E5939, 0x67332667FFC00B31, 0x8EB44A8768581511, 0xDB0C2E0D64F98FA7, 0x47B5481DBEFA4FA4 }; static const uint64_t IV512[8] = { 0x6A09E667F3BCC908, 0xBB67AE8584CAA73B, 0x3C6EF372FE94F82B, 0xA54FF53A5F1D36F1, 0x510E527FADE682D1, 0x9B05688C2B3E6C1F, 0x1F83D9ABFB41BD6B, 0x5BE0CD19137E2179 }; static const uint64_t _src_hash_sha2big_cK[80] = { 0x428A2F98D728AE22, 0x7137449123EF65CD, 0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC, 0x3956C25BF348B538, 0x59F111F1B605D019, 0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118, 0xD807AA98A3030242, 0x12835B0145706FBE, 0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2, 0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1, 0x9BDC06A725C71235, 0xC19BF174CF692694, 0xE49B69C19EF14AD2, 0xEFBE4786384F25E3, 0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65, 0x2DE92C6F592B0275, 0x4A7484AA6EA6E483, 0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5, 0x983E5152EE66DFAB, 0xA831C66D2DB43210, 0xB00327C898FB213F, 0xBF597FC7BEEF0EE4, 0xC6E00BF33DA88FC2, 0xD5A79147930AA725, 0x06CA6351E003826F, 0x142929670A0E6E70, 0x27B70A8546D22FFC, 0x2E1B21385C26C926, 0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF, 0x650A73548BAF63DE, 0x766A0ABB3C77B2A8, 0x81C2C92E47EDAEE6, 0x92722C851482353B, 0xA2BFE8A14CF10364, 0xA81A664BBC423001, 0xC24B8B70D0F89791, 0xC76C51A30654BE30, 0xD192E819D6EF5218, 0xD69906245565A910, 0xF40E35855771202A, 0x106AA07032BBD1B8, 0x19A4C116B8D2D0C8, 0x1E376C085141AB53, 0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8, 0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB, 0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3, 0x748F82EE5DEFB2FC, 0x78A5636F43172F60, 0x84C87814A1F0AB72, 0x8CC702081A6439EC, 0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9, 0xBEF9A3F7B2C67915, 0xC67178F2E372532B, 0xCA273ECEEA26619C, 0xD186B8C721C0C207, 0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178, 0x06F067AA72176FBA, 0x0A637DC5A2C898A6, 0x113F9804BEF90DAE, 0x1B710B35131C471B, 0x28DB77F523047D84, 0x32CAAB7B40C72493, 0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C, 0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A, 0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817 }; static void sha2big_round(const unsigned char *buf, uint64_t *val) { #define SHA2BIG_STEP(A, B, C, D, E, F, G, H, j) do { \ uint64_t T1, T2; \ T1 = H + BSG5_1(E) + CH(E, F, G) + _src_hash_sha2big_cK[j] + w[j]; \ T2 = BSG5_0(A) + MAJ(A, B, C); \ D += T1; \ H = T1 + T2; \ } while (0) int i; uint64_t a, b, c, d, e, f, g, h; uint64_t w[80]; br_range_dec64be(w, 16, buf); for (i = 16; i < 80; i ++) { w[i] = SSG5_1(w[i - 2]) + w[i - 7] + SSG5_0(w[i - 15]) + w[i - 16]; } a = val[0]; b = val[1]; c = val[2]; d = val[3]; e = val[4]; f = val[5]; g = val[6]; h = val[7]; for (i = 0; i < 80; i += 8) { SHA2BIG_STEP(a, b, c, d, e, f, g, h, i + 0); SHA2BIG_STEP(h, a, b, c, d, e, f, g, i + 1); SHA2BIG_STEP(g, h, a, b, c, d, e, f, i + 2); SHA2BIG_STEP(f, g, h, a, b, c, d, e, i + 3); SHA2BIG_STEP(e, f, g, h, a, b, c, d, i + 4); SHA2BIG_STEP(d, e, f, g, h, a, b, c, i + 5); SHA2BIG_STEP(c, d, e, f, g, h, a, b, i + 6); SHA2BIG_STEP(b, c, d, e, f, g, h, a, i + 7); } val[0] += a; val[1] += b; val[2] += c; val[3] += d; val[4] += e; val[5] += f; val[6] += g; val[7] += h; } static void sha2big_update(br_sha384_context *cc, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)cc->count & 127; cc->count += (uint64_t)len; while (len > 0) { size_t clen; clen = 128 - ptr; if (clen > len) { clen = len; } memcpy(cc->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; if (ptr == 128) { sha2big_round(cc->buf, cc->val); ptr = 0; } } } static void sha2big_out(const br_sha384_context *cc, void *dst, int num) { unsigned char buf[128]; uint64_t val[8]; size_t ptr; ptr = (size_t)cc->count & 127; memcpy(buf, cc->buf, ptr); memcpy(val, cc->val, sizeof val); buf[ptr ++] = 0x80; if (ptr > 112) { memset(buf + ptr, 0, 128 - ptr); sha2big_round(buf, val); memset(buf, 0, 112); } else { memset(buf + ptr, 0, 112 - ptr); } br_enc64be(buf + 112, cc->count >> 61); br_enc64be(buf + 120, cc->count << 3); sha2big_round(buf, val); br_range_enc64be(dst, val, num); } /* see bearssl.h */ void br_sha384_init(br_sha384_context *cc) { cc->vtable = &br_sha384_vtable; memcpy(cc->val, IV384, sizeof IV384); cc->count = 0; } /* see bearssl.h */ void br_sha384_update(br_sha384_context *cc, const void *data, size_t len) { sha2big_update(cc, data, len); } /* see bearssl.h */ void br_sha384_out(const br_sha384_context *cc, void *dst) { sha2big_out(cc, dst, 6); } /* see bearssl.h */ uint64_t br_sha384_state(const br_sha384_context *cc, void *dst) { br_range_enc64be(dst, cc->val, 8); return cc->count; } /* see bearssl.h */ void br_sha384_set_state(br_sha384_context *cc, const void *stb, uint64_t count) { br_range_dec64be(cc->val, 8, stb); cc->count = count; } /* see bearssl.h */ void br_sha512_init(br_sha512_context *cc) { cc->vtable = &br_sha512_vtable; memcpy(cc->val, IV512, sizeof IV512); cc->count = 0; } /* see bearssl.h */ void br_sha512_out(const br_sha512_context *cc, void *dst) { sha2big_out(cc, dst, 8); } /* see bearssl.h */ const br_hash_class br_sha384_vtable = { sizeof(br_sha384_context), BR_HASHDESC_ID(br_sha384_ID) | BR_HASHDESC_OUT(48) | BR_HASHDESC_STATE(64) | BR_HASHDESC_LBLEN(7) | BR_HASHDESC_MD_PADDING | BR_HASHDESC_MD_PADDING_BE | BR_HASHDESC_MD_PADDING_128, (void (*)(const br_hash_class **))&br_sha384_init, (void (*)(const br_hash_class **, const void *, size_t)) &br_sha384_update, (void (*)(const br_hash_class *const *, void *))&br_sha384_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_sha384_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_sha384_set_state }; /* see bearssl.h */ const br_hash_class br_sha512_vtable = { sizeof(br_sha512_context), BR_HASHDESC_ID(br_sha512_ID) | BR_HASHDESC_OUT(64) | BR_HASHDESC_STATE(64) | BR_HASHDESC_LBLEN(7) | BR_HASHDESC_MD_PADDING | BR_HASHDESC_MD_PADDING_BE | BR_HASHDESC_MD_PADDING_128, (void (*)(const br_hash_class **))&br_sha512_init, (void (*)(const br_hash_class **, const void *, size_t)) &br_sha512_update, (void (*)(const br_hash_class *const *, void *))&br_sha512_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_sha512_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_sha512_set_state }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define CH(X, Y, Z) ((((Y) ^ (Z)) & (X)) ^ (Z)) #define MAJ(X, Y, Z) (((Y) & (Z)) | (((Y) | (Z)) & (X))) #define _src_hash_sha2small_cROTR(x, n) (((uint32_t)(x) << (32 - (n))) | ((uint32_t)(x) >> (n))) #define BSG2_0(x) (_src_hash_sha2small_cROTR(x, 2) ^ _src_hash_sha2small_cROTR(x, 13) ^ _src_hash_sha2small_cROTR(x, 22)) #define BSG2_1(x) (_src_hash_sha2small_cROTR(x, 6) ^ _src_hash_sha2small_cROTR(x, 11) ^ _src_hash_sha2small_cROTR(x, 25)) #define SSG2_0(x) (_src_hash_sha2small_cROTR(x, 7) ^ _src_hash_sha2small_cROTR(x, 18) ^ (uint32_t)((x) >> 3)) #define SSG2_1(x) (_src_hash_sha2small_cROTR(x, 17) ^ _src_hash_sha2small_cROTR(x, 19) ^ (uint32_t)((x) >> 10)) /* see inner.h */ const uint32_t br_sha224_IV[8] = { 0xC1059ED8, 0x367CD507, 0x3070DD17, 0xF70E5939, 0xFFC00B31, 0x68581511, 0x64F98FA7, 0xBEFA4FA4 }; /* see inner.h */ const uint32_t br_sha256_IV[8] = { 0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19 }; static const uint32_t _src_hash_sha2small_cK[64] = { 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2 }; /* see inner.h */ void br_sha2small_round(const unsigned char *buf, uint32_t *val) { #define SHA2_STEP(A, B, C, D, E, F, G, H, j) do { \ uint32_t T1, T2; \ T1 = H + BSG2_1(E) + CH(E, F, G) + _src_hash_sha2small_cK[j] + w[j]; \ T2 = BSG2_0(A) + MAJ(A, B, C); \ D += T1; \ H = T1 + T2; \ } while (0) int i; uint32_t a, b, c, d, e, f, g, h; uint32_t w[64]; br_range_dec32be(w, 16, buf); for (i = 16; i < 64; i ++) { w[i] = SSG2_1(w[i - 2]) + w[i - 7] + SSG2_0(w[i - 15]) + w[i - 16]; } a = val[0]; b = val[1]; c = val[2]; d = val[3]; e = val[4]; f = val[5]; g = val[6]; h = val[7]; for (i = 0; i < 64; i += 8) { SHA2_STEP(a, b, c, d, e, f, g, h, i + 0); SHA2_STEP(h, a, b, c, d, e, f, g, i + 1); SHA2_STEP(g, h, a, b, c, d, e, f, i + 2); SHA2_STEP(f, g, h, a, b, c, d, e, i + 3); SHA2_STEP(e, f, g, h, a, b, c, d, i + 4); SHA2_STEP(d, e, f, g, h, a, b, c, i + 5); SHA2_STEP(c, d, e, f, g, h, a, b, i + 6); SHA2_STEP(b, c, d, e, f, g, h, a, i + 7); } val[0] += a; val[1] += b; val[2] += c; val[3] += d; val[4] += e; val[5] += f; val[6] += g; val[7] += h; #if 0 /* obsolete */ #define SHA2_MEXP1(pc) do { \ W[pc] = br_dec32be(buf + ((pc) << 2)); \ } while (0) #define SHA2_MEXP2(pc) do { \ W[(pc) & 0x0F] = SSG2_1(W[((pc) - 2) & 0x0F]) \ + W[((pc) - 7) & 0x0F] \ + SSG2_0(W[((pc) - 15) & 0x0F]) + W[(pc) & 0x0F]; \ } while (0) #define SHA2_STEPn(n, a, b, c, d, e, f, g, h, pc) do { \ uint32_t t1, t2; \ SHA2_MEXP ## n(pc); \ t1 = h + BSG2_1(e) + CH(e, f, g) \ + K[pcount + (pc)] + W[(pc) & 0x0F]; \ t2 = BSG2_0(a) + MAJ(a, b, c); \ d += t1; \ h = t1 + t2; \ } while (0) #define SHA2_STEP1(a, b, c, d, e, f, g, h, pc) \ SHA2_STEPn(1, a, b, c, d, e, f, g, h, pc) #define SHA2_STEP2(a, b, c, d, e, f, g, h, pc) \ SHA2_STEPn(2, a, b, c, d, e, f, g, h, pc) uint32_t A, B, C, D, E, F, G, H; uint32_t W[16]; unsigned pcount; A = val[0]; B = val[1]; C = val[2]; D = val[3]; E = val[4]; F = val[5]; G = val[6]; H = val[7]; pcount = 0; SHA2_STEP1(A, B, C, D, E, F, G, H, 0); SHA2_STEP1(H, A, B, C, D, E, F, G, 1); SHA2_STEP1(G, H, A, B, C, D, E, F, 2); SHA2_STEP1(F, G, H, A, B, C, D, E, 3); SHA2_STEP1(E, F, G, H, A, B, C, D, 4); SHA2_STEP1(D, E, F, G, H, A, B, C, 5); SHA2_STEP1(C, D, E, F, G, H, A, B, 6); SHA2_STEP1(B, C, D, E, F, G, H, A, 7); SHA2_STEP1(A, B, C, D, E, F, G, H, 8); SHA2_STEP1(H, A, B, C, D, E, F, G, 9); SHA2_STEP1(G, H, A, B, C, D, E, F, 10); SHA2_STEP1(F, G, H, A, B, C, D, E, 11); SHA2_STEP1(E, F, G, H, A, B, C, D, 12); SHA2_STEP1(D, E, F, G, H, A, B, C, 13); SHA2_STEP1(C, D, E, F, G, H, A, B, 14); SHA2_STEP1(B, C, D, E, F, G, H, A, 15); for (pcount = 16; pcount < 64; pcount += 16) { SHA2_STEP2(A, B, C, D, E, F, G, H, 0); SHA2_STEP2(H, A, B, C, D, E, F, G, 1); SHA2_STEP2(G, H, A, B, C, D, E, F, 2); SHA2_STEP2(F, G, H, A, B, C, D, E, 3); SHA2_STEP2(E, F, G, H, A, B, C, D, 4); SHA2_STEP2(D, E, F, G, H, A, B, C, 5); SHA2_STEP2(C, D, E, F, G, H, A, B, 6); SHA2_STEP2(B, C, D, E, F, G, H, A, 7); SHA2_STEP2(A, B, C, D, E, F, G, H, 8); SHA2_STEP2(H, A, B, C, D, E, F, G, 9); SHA2_STEP2(G, H, A, B, C, D, E, F, 10); SHA2_STEP2(F, G, H, A, B, C, D, E, 11); SHA2_STEP2(E, F, G, H, A, B, C, D, 12); SHA2_STEP2(D, E, F, G, H, A, B, C, 13); SHA2_STEP2(C, D, E, F, G, H, A, B, 14); SHA2_STEP2(B, C, D, E, F, G, H, A, 15); } val[0] += A; val[1] += B; val[2] += C; val[3] += D; val[4] += E; val[5] += F; val[6] += G; val[7] += H; #endif } static void sha2small_update(br_sha224_context *cc, const void *data, size_t len) { const unsigned char *buf; size_t ptr; buf = (unsigned char*)data; ptr = (size_t)cc->count & 63; cc->count += (uint64_t)len; while (len > 0) { size_t clen; clen = 64 - ptr; if (clen > len) { clen = len; } memcpy(cc->buf + ptr, buf, clen); ptr += clen; buf += clen; len -= clen; if (ptr == 64) { br_sha2small_round(cc->buf, cc->val); ptr = 0; } } } static void sha2small_out(const br_sha224_context *cc, void *dst, int num) { unsigned char buf[64]; uint32_t val[8]; size_t ptr; ptr = (size_t)cc->count & 63; memcpy(buf, cc->buf, ptr); memcpy(val, cc->val, sizeof val); buf[ptr ++] = 0x80; if (ptr > 56) { memset(buf + ptr, 0, 64 - ptr); br_sha2small_round(buf, val); memset(buf, 0, 56); } else { memset(buf + ptr, 0, 56 - ptr); } br_enc64be(buf + 56, cc->count << 3); br_sha2small_round(buf, val); br_range_enc32be(dst, val, num); } /* see bearssl.h */ void br_sha224_init(br_sha224_context *cc) { cc->vtable = &br_sha224_vtable; memcpy(cc->val, br_sha224_IV, sizeof cc->val); cc->count = 0; } /* see bearssl.h */ void br_sha224_update(br_sha224_context *cc, const void *data, size_t len) { sha2small_update(cc, data, len); } /* see bearssl.h */ void br_sha224_out(const br_sha224_context *cc, void *dst) { sha2small_out(cc, dst, 7); } /* see bearssl.h */ uint64_t br_sha224_state(const br_sha224_context *cc, void *dst) { br_range_enc32be(dst, cc->val, 8); return cc->count; } /* see bearssl.h */ void br_sha224_set_state(br_sha224_context *cc, const void *stb, uint64_t count) { br_range_dec32be(cc->val, 8, stb); cc->count = count; } /* see bearssl.h */ void br_sha256_init(br_sha256_context *cc) { cc->vtable = &br_sha256_vtable; memcpy(cc->val, br_sha256_IV, sizeof cc->val); cc->count = 0; } /* see bearssl.h */ void br_sha256_out(const br_sha256_context *cc, void *dst) { sha2small_out(cc, dst, 8); } /* see bearssl.h */ const br_hash_class br_sha224_vtable = { sizeof(br_sha224_context), BR_HASHDESC_ID(br_sha224_ID) | BR_HASHDESC_OUT(28) | BR_HASHDESC_STATE(32) | BR_HASHDESC_LBLEN(6) | BR_HASHDESC_MD_PADDING | BR_HASHDESC_MD_PADDING_BE, (void (*)(const br_hash_class **))&br_sha224_init, (void (*)(const br_hash_class **, const void *, size_t))&br_sha224_update, (void (*)(const br_hash_class *const *, void *))&br_sha224_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_sha224_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_sha224_set_state }; /* see bearssl.h */ const br_hash_class br_sha256_vtable = { sizeof(br_sha256_context), BR_HASHDESC_ID(br_sha256_ID) | BR_HASHDESC_OUT(32) | BR_HASHDESC_STATE(32) | BR_HASHDESC_LBLEN(6) | BR_HASHDESC_MD_PADDING | BR_HASHDESC_MD_PADDING_BE, (void (*)(const br_hash_class **))&br_sha256_init, (void (*)(const br_hash_class **, const void *, size_t))&br_sha256_update, (void (*)(const br_hash_class *const *, void *))&br_sha256_out, (uint64_t (*)(const br_hash_class *const *, void *))&br_sha256_state, (void (*)(const br_hash_class **, const void *, uint64_t)) &br_sha256_set_state }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_add(uint16_t *a, const uint16_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 31) >> 4; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw + bw + cc; cc = naw >> 15; a[u] = MUX(ctl, naw & 0x7FFF, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_bit_length(uint16_t *x, size_t xlen) { uint32_t tw, twk; tw = 0; twk = 0; while (xlen -- > 0) { uint32_t w, c; c = EQ(tw, 0); w = x[xlen]; tw = MUX(c, w, tw); twk = MUX(c, (uint32_t)xlen, twk); } return (twk << 4) + BIT_LENGTH(tw); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_decode_mod(uint16_t *x, const void *src, size_t len, const uint16_t *m) { /* * Two-pass algorithm: in the first pass, we determine whether the * value fits; in the second pass, we do the actual write. * * During the first pass, 'r' contains the comparison result so * far: * 0x00000000 value is equal to the modulus * 0x00000001 value is greater than the modulus * 0xFFFFFFFF value is lower than the modulus * * Since we iterate starting with the least significant bytes (at * the end of src[]), each new comparison overrides the previous * except when the comparison yields 0 (equal). * * During the second pass, 'r' is either 0xFFFFFFFF (value fits) * or 0x00000000 (value does not fit). * * We must iterate over all bytes of the source, _and_ possibly * some extra virtual bytes (with value 0) so as to cover the * complete modulus as well. We also add 4 such extra bytes beyond * the modulus length because it then guarantees that no accumulated * partial word remains to be processed. */ const unsigned char *buf; size_t mlen, tlen; int pass; uint32_t r; buf = (const unsigned char*)src; mlen = (m[0] + 15) >> 4; tlen = (mlen << 1); if (tlen < len) { tlen = len; } tlen += 4; r = 0; for (pass = 0; pass < 2; pass ++) { size_t u, v; uint32_t acc; int acc_len; v = 1; acc = 0; acc_len = 0; for (u = 0; u < tlen; u ++) { uint32_t b; if (u < len) { b = buf[len - 1 - u]; } else { b = 0; } acc |= (b << acc_len); acc_len += 8; if (acc_len >= 15) { uint32_t xw; xw = acc & (uint32_t)0x7FFF; acc_len -= 15; acc = b >> (8 - acc_len); if (v <= mlen) { if (pass) { x[v] = r & xw; } else { uint32_t cc; cc = (uint32_t)CMP(xw, m[v]); r = MUX(EQ(cc, 0), r, cc); } } else { if (!pass) { r = MUX(EQ(xw, 0), r, 1); } } v ++; } } /* * When we reach this point at the end of the first pass: * r is either 0, 1 or -1; we want to set r to 0 if it * is equal to 0 or 1, and leave it to -1 otherwise. * * When we reach this point at the end of the second pass: * r is either 0 or -1; we want to leave that value * untouched. This is a subcase of the previous. */ r >>= 1; r |= (r << 1); } x[0] = m[0]; return r & (uint32_t)1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_decode(uint16_t *x, const void *src, size_t len) { const unsigned char *buf; size_t v; uint32_t acc; int acc_len; buf = (const unsigned char*)src; v = 1; acc = 0; acc_len = 0; while (len -- > 0) { uint32_t b; b = buf[len]; acc |= (b << acc_len); acc_len += 8; if (acc_len >= 15) { x[v ++] = acc & 0x7FFF; acc_len -= 15; acc >>= 15; } } if (acc_len != 0) { x[v ++] = acc; } x[0] = br_i15_bit_length(x + 1, v - 1); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_decode_reduce(uint16_t *x, const void *src, size_t len, const uint16_t *m) { uint32_t m_ebitlen, m_rbitlen; size_t mblen, k; const unsigned char *buf; uint32_t acc; int acc_len; /* * Get the encoded bit length. */ m_ebitlen = m[0]; /* * Special case for an invalid (null) modulus. */ if (m_ebitlen == 0) { x[0] = 0; return; } /* * Clear the destination. */ br_i15_zero(x, m_ebitlen); /* * First decode directly as many bytes as possible. This requires * computing the actual bit length. */ m_rbitlen = m_ebitlen >> 4; m_rbitlen = (m_ebitlen & 15) + (m_rbitlen << 4) - m_rbitlen; mblen = (m_rbitlen + 7) >> 3; k = mblen - 1; if (k >= len) { br_i15_decode(x, src, len); x[0] = m_ebitlen; return; } buf = (const unsigned char*)src; br_i15_decode(x, buf, k); x[0] = m_ebitlen; /* * Input remaining bytes, using 15-bit words. */ acc = 0; acc_len = 0; while (k < len) { uint32_t v; v = buf[k ++]; acc = (acc << 8) | v; acc_len += 8; if (acc_len >= 15) { br_i15_muladd_small(x, acc >> (acc_len - 15), m); acc_len -= 15; acc &= ~((uint32_t)-1 << acc_len); } } /* * We may have some bits accumulated. We then perform a shift to * be able to inject these bits as a full 15-bit word. */ if (acc_len != 0) { acc = (acc | (x[1] << acc_len)) & 0x7FFF; br_i15_rshift(x, 15 - acc_len); br_i15_muladd_small(x, acc, m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_encode(void *dst, size_t len, const uint16_t *x) { unsigned char *buf; size_t u, xlen; uint32_t acc; int acc_len; xlen = (x[0] + 15) >> 4; if (xlen == 0) { memset(dst, 0, len); return; } u = 1; acc = 0; acc_len = 0; buf = (unsigned char*)dst; while (len -- > 0) { if (acc_len < 8) { if (u <= xlen) { acc += (uint32_t)x[u ++] << acc_len; } acc_len += 15; } buf[len] = (unsigned char)acc; acc >>= 8; acc_len -= 8; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_from_monty(uint16_t *x, const uint16_t *m, uint16_t m0i) { size_t len, u, v; len = (m[0] + 15) >> 4; for (u = 0; u < len; u ++) { uint32_t f, cc; f = MUL15(x[1], m0i) & 0x7FFF; cc = 0; for (v = 0; v < len; v ++) { uint32_t z; z = (uint32_t)x[v + 1] + MUL15(f, m[v + 1]) + cc; cc = z >> 15; if (v != 0) { x[v] = z & 0x7FFF; } } x[len] = cc; } /* * We may have to do an extra subtraction, but only if the * value in x[] is indeed greater than or equal to that of m[], * which is why we must do two calls (first call computes the * carry, second call performs the subtraction only if the carry * is 0). */ br_i15_sub(x, m, NOT(br_i15_sub(x, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_iszero(const uint16_t *x) { uint32_t z; size_t u; z = 0; for (u = (x[0] + 15) >> 4; u > 0; u --) { z |= x[u]; } return ~(z | -z) >> 31; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * In this file, we handle big integers with a custom format, i.e. * without the usual one-word header. Value is split into 15-bit words, * each stored in a 16-bit slot (top bit is zero) in little-endian * order. The length (in words) is provided explicitly. In some cases, * the value can be negative (using two's complement representation). In * some cases, the top word is allowed to have a 16th bit. */ /* * Negate big integer conditionally. The value consists of 'len' words, * with 15 bits in each word (the top bit of each word should be 0, * except possibly for the last word). If 'ctl' is 1, the negation is * computed; otherwise, if 'ctl' is 0, then the value is unchanged. */ static void _src_int_i15_moddiv_ccond_negate(uint16_t *a, size_t len, uint32_t ctl) { size_t k; uint32_t cc, xm; cc = ctl; xm = 0x7FFF & -ctl; for (k = 0; k < len; k ++) { uint32_t aw; aw = a[k]; aw = (aw ^ xm) + cc; a[k] = aw & 0x7FFF; cc = (aw >> 15) & 1; } } /* * Finish modular reduction. Rules on input parameters: * * if neg = 1, then -m <= a < 0 * if neg = 0, then 0 <= a < 2*m * * If neg = 0, then the top word of a[] may use 16 bits. * * Also, modulus m must be odd. */ static void _src_int_i15_moddiv_cfinish_mod(uint16_t *a, size_t len, const uint16_t *m, uint32_t neg) { size_t k; uint32_t cc, xm, ym; /* * First pass: compare a (assumed nonnegative) with m. */ cc = 0; for (k = 0; k < len; k ++) { uint32_t aw, mw; aw = a[k]; mw = m[k]; cc = (aw - mw - cc) >> 31; } /* * At this point: * if neg = 1, then we must add m (regardless of cc) * if neg = 0 and cc = 0, then we must subtract m * if neg = 0 and cc = 1, then we must do nothing */ xm = 0x7FFF & -neg; ym = -(neg | (1 - cc)); cc = neg; for (k = 0; k < len; k ++) { uint32_t aw, mw; aw = a[k]; mw = (m[k] ^ xm) & ym; aw = aw - mw - cc; a[k] = aw & 0x7FFF; cc = aw >> 31; } } /* * Compute: * a <- (a*pa+b*pb)/(2^15) * b <- (a*qa+b*qb)/(2^15) * The division is assumed to be exact (i.e. the low word is dropped). * If the final a is negative, then it is negated. Similarly for b. * Returned value is the combination of two bits: * bit 0: 1 if a had to be negated, 0 otherwise * bit 1: 1 if b had to be negated, 0 otherwise * * Factors pa, pb, qa and qb must be at most 2^15 in absolute value. * Source integers a and b must be nonnegative; top word is not allowed * to contain an extra 16th bit. */ static uint32_t _src_int_i15_moddiv_cco_reduce(uint16_t *a, uint16_t *b, size_t len, int32_t pa, int32_t pb, int32_t qa, int32_t qb) { size_t k; int32_t cca, ccb; uint32_t nega, negb; cca = 0; ccb = 0; for (k = 0; k < len; k ++) { uint32_t wa, wb, za, zb; uint16_t tta, ttb; /* * Since: * |pa| <= 2^15 * |pb| <= 2^15 * 0 <= wa <= 2^15 - 1 * 0 <= wb <= 2^15 - 1 * |cca| <= 2^16 - 1 * Then: * |za| <= (2^15-1)*(2^16) + (2^16-1) = 2^31 - 1 * * Thus, the new value of cca is such that |cca| <= 2^16 - 1. * The same applies to ccb. */ wa = a[k]; wb = b[k]; za = wa * (uint32_t)pa + wb * (uint32_t)pb + (uint32_t)cca; zb = wa * (uint32_t)qa + wb * (uint32_t)qb + (uint32_t)ccb; if (k > 0) { a[k - 1] = za & 0x7FFF; b[k - 1] = zb & 0x7FFF; } tta = za >> 15; ttb = zb >> 15; cca = *(int16_t *)&tta; ccb = *(int16_t *)&ttb; } a[len - 1] = (uint16_t)cca; b[len - 1] = (uint16_t)ccb; nega = (uint32_t)cca >> 31; negb = (uint32_t)ccb >> 31; _src_int_i15_moddiv_ccond_negate(a, len, nega); _src_int_i15_moddiv_ccond_negate(b, len, negb); return nega | (negb << 1); } /* * Compute: * a <- (a*pa+b*pb)/(2^15) mod m * b <- (a*qa+b*qb)/(2^15) mod m * * m0i is equal to -1/m[0] mod 2^15. * * Factors pa, pb, qa and qb must be at most 2^15 in absolute value. * Source integers a and b must be nonnegative; top word is not allowed * to contain an extra 16th bit. */ static void _src_int_i15_moddiv_cco_reduce_mod(uint16_t *a, uint16_t *b, size_t len, int32_t pa, int32_t pb, int32_t qa, int32_t qb, const uint16_t *m, uint16_t m0i) { size_t k; int32_t cca, ccb, fa, fb; cca = 0; ccb = 0; fa = ((a[0] * (uint32_t)pa + b[0] * (uint32_t)pb) * m0i) & 0x7FFF; fb = ((a[0] * (uint32_t)qa + b[0] * (uint32_t)qb) * m0i) & 0x7FFF; for (k = 0; k < len; k ++) { uint32_t wa, wb, za, zb; uint32_t tta, ttb; /* * In this loop, carries 'cca' and 'ccb' always fit on * 17 bits (in absolute value). */ wa = a[k]; wb = b[k]; za = wa * (uint32_t)pa + wb * (uint32_t)pb + m[k] * (uint32_t)fa + (uint32_t)cca; zb = wa * (uint32_t)qa + wb * (uint32_t)qb + m[k] * (uint32_t)fb + (uint32_t)ccb; if (k > 0) { a[k - 1] = za & 0x7FFF; b[k - 1] = zb & 0x7FFF; } /* * The XOR-and-sub construction below does an arithmetic * right shift in a portable way (technically, right-shifting * a negative signed value is implementation-defined in C). */ #define M ((uint32_t)1 << 16) tta = za >> 15; ttb = zb >> 15; tta = (tta ^ M) - M; ttb = (ttb ^ M) - M; cca = *(int32_t *)&tta; ccb = *(int32_t *)&ttb; #undef M } a[len - 1] = (uint32_t)cca; b[len - 1] = (uint32_t)ccb; /* * At this point: * -m <= a < 2*m * -m <= b < 2*m * (this is a case of Montgomery reduction) * The top word of 'a' and 'b' may have a 16-th bit set. * We may have to add or subtract the modulus. */ _src_int_i15_moddiv_cfinish_mod(a, len, m, (uint32_t)cca >> 31); _src_int_i15_moddiv_cfinish_mod(b, len, m, (uint32_t)ccb >> 31); } /* see inner.h */ uint32_t br_i15_moddiv(uint16_t *x, const uint16_t *y, const uint16_t *m, uint16_t m0i, uint16_t *t) { /* * Algorithm is an extended binary GCD. We maintain four values * a, b, u and v, with the following invariants: * * a * x = y * u mod m * b * x = y * v mod m * * Starting values are: * * a = y * b = m * u = x * v = 0 * * The formal definition of the algorithm is a sequence of steps: * * - If a is even, then a <- a/2 and u <- u/2 mod m. * - Otherwise, if b is even, then b <- b/2 and v <- v/2 mod m. * - Otherwise, if a > b, then a <- (a-b)/2 and u <- (u-v)/2 mod m. * - Otherwise, b <- (b-a)/2 and v <- (v-u)/2 mod m. * * Algorithm stops when a = b. At that point, they both are equal * to GCD(y,m); the modular division succeeds if that value is 1. * The result of the modular division is then u (or v: both are * equal at that point). * * Each step makes either a or b shrink by at least one bit; hence, * if m has bit length k bits, then 2k-2 steps are sufficient. * * * Though complexity is quadratic in the size of m, the bit-by-bit * processing is not very efficient. We can speed up processing by * remarking that the decisions are taken based only on observation * of the top and low bits of a and b. * * In the loop below, at each iteration, we use the two top words * of a and b, and the low words of a and b, to compute reduction * parameters pa, pb, qa and qb such that the new values for a * and b are: * * a' = (a*pa + b*pb) / (2^15) * b' = (a*qa + b*qb) / (2^15) * * the division being exact. * * Since the choices are based on the top words, they may be slightly * off, requiring an optional correction: if a' < 0, then we replace * pa with -pa, and pb with -pb. The total length of a and b is * thus reduced by at least 14 bits at each iteration. * * The stopping conditions are still the same, though: when a * and b become equal, they must be both odd (since m is odd, * the GCD cannot be even), therefore the next operation is a * subtraction, and one of the values becomes 0. At that point, * nothing else happens, i.e. one value is stuck at 0, and the * other one is the GCD. */ size_t len, k; uint16_t *a, *b, *u, *v; uint32_t num, r; len = (m[0] + 15) >> 4; a = t; b = a + len; u = x + 1; v = b + len; memcpy(a, y + 1, len * sizeof *y); memcpy(b, m + 1, len * sizeof *m); memset(v, 0, len * sizeof *v); /* * Loop below ensures that a and b are reduced by some bits each, * for a total of at least 14 bits. */ for (num = ((m[0] - (m[0] >> 4)) << 1) + 14; num >= 14; num -= 14) { size_t j; uint32_t c0, c1; uint32_t a0, a1, b0, b1; uint32_t a_hi, b_hi, a_lo, b_lo; int32_t pa, pb, qa, qb; int i; /* * Extract top words of a and b. If j is the highest * index >= 1 such that a[j] != 0 or b[j] != 0, then we want * (a[j] << 15) + a[j - 1], and (b[j] << 15) + b[j - 1]. * If a and b are down to one word each, then we use a[0] * and b[0]. */ c0 = (uint32_t)-1; c1 = (uint32_t)-1; a0 = 0; a1 = 0; b0 = 0; b1 = 0; j = len; while (j -- > 0) { uint32_t aw, bw; aw = a[j]; bw = b[j]; a0 ^= (a0 ^ aw) & c0; a1 ^= (a1 ^ aw) & c1; b0 ^= (b0 ^ bw) & c0; b1 ^= (b1 ^ bw) & c1; c1 = c0; c0 &= (((aw | bw) + 0xFFFF) >> 16) - (uint32_t)1; } /* * If c1 = 0, then we grabbed two words for a and b. * If c1 != 0 but c0 = 0, then we grabbed one word. It * is not possible that c1 != 0 and c0 != 0, because that * would mean that both integers are zero. */ a1 |= a0 & c1; a0 &= ~c1; b1 |= b0 & c1; b0 &= ~c1; a_hi = (a0 << 15) + a1; b_hi = (b0 << 15) + b1; a_lo = a[0]; b_lo = b[0]; /* * Compute reduction factors: * * a' = a*pa + b*pb * b' = a*qa + b*qb * * such that a' and b' are both multiple of 2^15, but are * only marginally larger than a and b. */ pa = 1; pb = 0; qa = 0; qb = 1; for (i = 0; i < 15; i ++) { /* * At each iteration: * * a <- (a-b)/2 if: a is odd, b is odd, a_hi > b_hi * b <- (b-a)/2 if: a is odd, b is odd, a_hi <= b_hi * a <- a/2 if: a is even * b <- b/2 if: a is odd, b is even * * We multiply a_lo and b_lo by 2 at each * iteration, thus a division by 2 really is a * non-multiplication by 2. */ uint32_t r, oa, ob, cAB, cBA, cA; /* * cAB = 1 if b must be subtracted from a * cBA = 1 if a must be subtracted from b * cA = 1 if a is divided by 2, 0 otherwise * * Rules: * * cAB and cBA cannot be both 1. * if a is not divided by 2, b is. */ r = GT(a_hi, b_hi); oa = (a_lo >> i) & 1; ob = (b_lo >> i) & 1; cAB = oa & ob & r; cBA = oa & ob & NOT(r); cA = cAB | NOT(oa); /* * Conditional subtractions. */ a_lo -= b_lo & -cAB; a_hi -= b_hi & -cAB; pa -= qa & -(int32_t)cAB; pb -= qb & -(int32_t)cAB; b_lo -= a_lo & -cBA; b_hi -= a_hi & -cBA; qa -= pa & -(int32_t)cBA; qb -= pb & -(int32_t)cBA; /* * Shifting. */ a_lo += a_lo & (cA - 1); pa += pa & ((int32_t)cA - 1); pb += pb & ((int32_t)cA - 1); a_hi ^= (a_hi ^ (a_hi >> 1)) & -cA; b_lo += b_lo & -cA; qa += qa & -(int32_t)cA; qb += qb & -(int32_t)cA; b_hi ^= (b_hi ^ (b_hi >> 1)) & (cA - 1); } /* * Replace a and b with new values a' and b'. */ r = _src_int_i15_moddiv_cco_reduce(a, b, len, pa, pb, qa, qb); pa -= pa * ((r & 1) << 1); pb -= pb * ((r & 1) << 1); qa -= qa * (r & 2); qb -= qb * (r & 2); _src_int_i15_moddiv_cco_reduce_mod(u, v, len, pa, pb, qa, qb, m + 1, m0i); } /* * Now one of the arrays should be 0, and the other contains * the GCD. If a is 0, then u is 0 as well, and v contains * the division result. * Result is correct if and only if GCD is 1. */ r = (a[0] | b[0]) ^ 1; u[0] |= v[0]; for (k = 1; k < len; k ++) { r |= a[k] | b[k]; u[k] |= v[k]; } return EQ0(r); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_modpow(uint16_t *x, const unsigned char *e, size_t elen, const uint16_t *m, uint16_t m0i, uint16_t *t1, uint16_t *t2) { size_t mlen; unsigned k; mlen = ((m[0] + 31) >> 4) * sizeof m[0]; memcpy(t1, x, mlen); br_i15_to_monty(t1, m); br_i15_zero(x, m[0]); x[1] = 1; for (k = 0; k < ((unsigned)elen << 3); k ++) { uint32_t ctl; ctl = (e[elen - 1 - (k >> 3)] >> (k & 7)) & 1; br_i15_montymul(t2, x, t1, m, m0i); CCOPY(ctl, x, t2, mlen); br_i15_montymul(t2, t1, t1, m, m0i); memcpy(t1, t2, mlen); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_modpow_opt(uint16_t *x, const unsigned char *e, size_t elen, const uint16_t *m, uint16_t m0i, uint16_t *tmp, size_t twlen) { size_t mlen, mwlen; uint16_t *t1, *t2, *base; size_t u, v; uint32_t acc; int acc_len, win_len; /* * Get modulus size. */ mwlen = (m[0] + 31) >> 4; mlen = mwlen * sizeof m[0]; mwlen += (mwlen & 1); t1 = tmp; t2 = tmp + mwlen; /* * Compute possible window size, with a maximum of 5 bits. * When the window has size 1 bit, we use a specific code * that requires only two temporaries. Otherwise, for a * window of k bits, we need 2^k+1 temporaries. */ if (twlen < (mwlen << 1)) { return 0; } for (win_len = 5; win_len > 1; win_len --) { if ((((uint32_t)1 << win_len) + 1) * mwlen <= twlen) { break; } } /* * Everything is done in Montgomery representation. */ br_i15_to_monty(x, m); /* * Compute window contents. If the window has size one bit only, * then t2 is set to x; otherwise, t2[0] is left untouched, and * t2[k] is set to x^k (for k >= 1). */ if (win_len == 1) { memcpy(t2, x, mlen); } else { memcpy(t2 + mwlen, x, mlen); base = t2 + mwlen; for (u = 2; u < ((unsigned)1 << win_len); u ++) { br_i15_montymul(base + mwlen, base, x, m, m0i); base += mwlen; } } /* * We need to set x to 1, in Montgomery representation. This can * be done efficiently by setting the high word to 1, then doing * one word-sized shift. */ br_i15_zero(x, m[0]); x[(m[0] + 15) >> 4] = 1; br_i15_muladd_small(x, 0, m); /* * We process bits from most to least significant. At each * loop iteration, we have acc_len bits in acc. */ acc = 0; acc_len = 0; while (acc_len > 0 || elen > 0) { int i, k; uint32_t bits; /* * Get the next bits. */ k = win_len; if (acc_len < win_len) { if (elen > 0) { acc = (acc << 8) | *e ++; elen --; acc_len += 8; } else { k = acc_len; } } bits = (acc >> (acc_len - k)) & (((uint32_t)1 << k) - 1); acc_len -= k; /* * We could get exactly k bits. Compute k squarings. */ for (i = 0; i < k; i ++) { br_i15_montymul(t1, x, x, m, m0i); memcpy(x, t1, mlen); } /* * Window lookup: we want to set t2 to the window * lookup value, assuming the bits are non-zero. If * the window length is 1 bit only, then t2 is * already set; otherwise, we do a constant-time lookup. */ if (win_len > 1) { br_i15_zero(t2, m[0]); base = t2 + mwlen; for (u = 1; u < ((uint32_t)1 << k); u ++) { uint32_t mask; mask = -EQ(u, bits); for (v = 1; v < mwlen; v ++) { t2[v] |= mask & base[v]; } base += mwlen; } } /* * Multiply with the looked-up value. We keep the * product only if the exponent bits are not all-zero. */ br_i15_montymul(t1, x, t2, m, m0i); CCOPY(NEQ(bits, 0), x, t1, mlen); } /* * Convert back from Montgomery representation, and exit. */ br_i15_from_monty(x, m, m0i); return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_montymul(uint16_t *d, const uint16_t *x, const uint16_t *y, const uint16_t *m, uint16_t m0i) { size_t len, len4, u, v; uint32_t dh; len = (m[0] + 15) >> 4; len4 = len & ~(size_t)3; br_i15_zero(d, m[0]); dh = 0; for (u = 0; u < len; u ++) { uint32_t f, xu, r, zh; xu = x[u + 1]; f = MUL15((d[1] + MUL15(x[u + 1], y[1])) & 0x7FFF, m0i) & 0x7FFF; #if BR_ARMEL_CORTEXM_GCC if (len4 != 0) { uint16_t *limit; limit = d + len4; asm volatile ( "\n\ @ carry: r=r2 \n\ @ multipliers: xu=r3 f=r4 \n\ @ base registers: d+v=r5 y+v=r6 m+v=r7 \n\ @ r8 contains 0x7FFF \n\ @ r9 contains d+len4 \n\ ldr r0, %[limit] \n\ ldr r3, %[xu] \n\ mov r9, r0 \n\ ldr r4, %[f] \n\ eor r2, r2 \n\ ldr r5, %[d] \n\ sub r1, r2, #1 \n\ ldr r6, %[y] \n\ lsr r1, r1, #17 \n\ ldr r7, %[m] \n\ mov r8, r1 \n\ loop%=: \n\ ldrh r0, [r6, #2] \n\ ldrh r1, [r7, #2] \n\ mul r0, r3 \n\ mul r1, r4 \n\ add r2, r0, r2 \n\ ldrh r0, [r5, #2] \n\ add r2, r1, r2 \n\ mov r1, r8 \n\ add r2, r0, r2 \n\ and r1, r2 \n\ lsr r2, r2, #15 \n\ strh r1, [r5, #0] \n\ \n\ ldrh r0, [r6, #4] \n\ ldrh r1, [r7, #4] \n\ mul r0, r3 \n\ mul r1, r4 \n\ add r2, r0, r2 \n\ ldrh r0, [r5, #4] \n\ add r2, r1, r2 \n\ mov r1, r8 \n\ add r2, r0, r2 \n\ and r1, r2 \n\ lsr r2, r2, #15 \n\ strh r1, [r5, #2] \n\ \n\ ldrh r0, [r6, #6] \n\ ldrh r1, [r7, #6] \n\ mul r0, r3 \n\ mul r1, r4 \n\ add r2, r0, r2 \n\ ldrh r0, [r5, #6] \n\ add r2, r1, r2 \n\ mov r1, r8 \n\ add r2, r0, r2 \n\ and r1, r2 \n\ lsr r2, r2, #15 \n\ strh r1, [r5, #4] \n\ \n\ ldrh r0, [r6, #8] \n\ ldrh r1, [r7, #8] \n\ mul r0, r3 \n\ mul r1, r4 \n\ add r2, r0, r2 \n\ ldrh r0, [r5, #8] \n\ add r2, r1, r2 \n\ mov r1, r8 \n\ add r2, r0, r2 \n\ and r1, r2 \n\ lsr r2, r2, #15 \n\ strh r1, [r5, #6] \n\ \n\ add r5, r5, #8 \n\ add r6, r6, #8 \n\ add r7, r7, #8 \n\ cmp r5, r9 \n\ bne loop%= \n\ \n\ str r2, %[carry] \n\ " : [carry] "=m" (r) : [xu] "m" (xu), [f] "m" (f), [d] "m" (d), [y] "m" (y), [m] "m" (m), [limit] "m" (limit) : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9" ); } else { r = 0; } v = len4; #else r = 0; for (v = 0; v < len4; v += 4) { uint32_t z; z = d[v + 1] + MUL15(xu, y[v + 1]) + MUL15(f, m[v + 1]) + r; r = z >> 15; d[v + 0] = z & 0x7FFF; z = d[v + 2] + MUL15(xu, y[v + 2]) + MUL15(f, m[v + 2]) + r; r = z >> 15; d[v + 1] = z & 0x7FFF; z = d[v + 3] + MUL15(xu, y[v + 3]) + MUL15(f, m[v + 3]) + r; r = z >> 15; d[v + 2] = z & 0x7FFF; z = d[v + 4] + MUL15(xu, y[v + 4]) + MUL15(f, m[v + 4]) + r; r = z >> 15; d[v + 3] = z & 0x7FFF; } #endif for (; v < len; v ++) { uint32_t z; z = d[v + 1] + MUL15(xu, y[v + 1]) + MUL15(f, m[v + 1]) + r; r = z >> 15; d[v + 0] = z & 0x7FFF; } zh = dh + r; d[len] = zh & 0x7FFF; dh = zh >> 15; } /* * Restore the bit length (it was overwritten in the loop above). */ d[0] = m[0]; /* * d[] may be greater than m[], but it is still lower than twice * the modulus. */ br_i15_sub(d, m, NEQ(dh, 0) | NOT(br_i15_sub(d, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_mulacc(uint16_t *d, const uint16_t *a, const uint16_t *b) { size_t alen, blen, u; unsigned dl, dh; alen = (a[0] + 15) >> 4; blen = (b[0] + 15) >> 4; /* * Announced bit length of d[] will be the sum of the announced * bit lengths of a[] and b[]; but the lengths are encoded. */ dl = (a[0] & 15) + (b[0] & 15); dh = (a[0] >> 4) + (b[0] >> 4); d[0] = (dh << 4) + dl + (~(uint32_t)(dl - 15) >> 31); for (u = 0; u < blen; u ++) { uint32_t f; size_t v; uint32_t cc; f = b[1 + u]; cc = 0; for (v = 0; v < alen; v ++) { uint32_t z; z = (uint32_t)d[1 + u + v] + MUL15(f, a[1 + v]) + cc; cc = z >> 15; d[1 + u + v] = z & 0x7FFF; } d[1 + u + alen] = cc; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Constant-time division. The divisor must not be larger than 16 bits, * and the quotient must fit on 17 bits. */ static uint32_t divrem16(uint32_t x, uint32_t d, uint32_t *r) { int i; uint32_t q; q = 0; d <<= 16; for (i = 16; i >= 0; i --) { uint32_t ctl; ctl = LE(d, x); q |= ctl << i; x -= (-ctl) & d; d >>= 1; } if (r != NULL) { *r = x; } return q; } /* see inner.h */ void br_i15_muladd_small(uint16_t *x, uint16_t z, const uint16_t *m) { /* * Constant-time: we accept to leak the exact bit length of the * modulus m. */ unsigned m_bitlen, mblr; size_t u, mlen; uint32_t hi, a0, a, b, q; uint32_t cc, tb, over, under; /* * Simple case: the modulus fits on one word. */ m_bitlen = m[0]; if (m_bitlen == 0) { return; } if (m_bitlen <= 15) { uint32_t rem; divrem16(((uint32_t)x[1] << 15) | z, m[1], &rem); x[1] = rem; return; } mlen = (m_bitlen + 15) >> 4; mblr = m_bitlen & 15; /* * Principle: we estimate the quotient (x*2^15+z)/m by * doing a 30/15 division with the high words. * * Let: * w = 2^15 * a = (w*a0 + a1) * w^N + a2 * b = b0 * w^N + b2 * such that: * 0 <= a0 < w * 0 <= a1 < w * 0 <= a2 < w^N * w/2 <= b0 < w * 0 <= b2 < w^N * a < w*b * I.e. the two top words of a are a0:a1, the top word of b is * b0, we ensured that b0 is "full" (high bit set), and a is * such that the quotient q = a/b fits on one word (0 <= q < w). * * If a = b*q + r (with 0 <= r < q), then we can estimate q by * using a division on the top words: * a0*w + a1 = b0*u + v (with 0 <= v < b0) * Then the following holds: * 0 <= u <= w * u-2 <= q <= u */ hi = x[mlen]; if (mblr == 0) { a0 = x[mlen]; memmove(x + 2, x + 1, (mlen - 1) * sizeof *x); x[1] = z; a = (a0 << 15) + x[mlen]; b = m[mlen]; } else { a0 = (x[mlen] << (15 - mblr)) | (x[mlen - 1] >> mblr); memmove(x + 2, x + 1, (mlen - 1) * sizeof *x); x[1] = z; a = (a0 << 15) | (((x[mlen] << (15 - mblr)) | (x[mlen - 1] >> mblr)) & 0x7FFF); b = (m[mlen] << (15 - mblr)) | (m[mlen - 1] >> mblr); } q = divrem16(a, b, NULL); /* * We computed an estimate for q, but the real one may be q, * q-1 or q-2; moreover, the division may have returned a value * 8000 or even 8001 if the two high words were identical, and * we want to avoid values beyond 7FFF. We thus adjust q so * that the "true" multiplier will be q+1, q or q-1, and q is * in the 0000..7FFF range. */ q = MUX(EQ(b, a0), 0x7FFF, q - 1 + ((q - 1) >> 31)); /* * We subtract q*m from x (x has an extra high word of value 'hi'). * Since q may be off by 1 (in either direction), we may have to * add or subtract m afterwards. * * The 'tb' flag will be true (1) at the end of the loop if the * result is greater than or equal to the modulus (not counting * 'hi' or the carry). */ cc = 0; tb = 1; for (u = 1; u <= mlen; u ++) { uint32_t mw, zl, xw, nxw; mw = m[u]; zl = MUL15(mw, q) + cc; cc = zl >> 15; zl &= 0x7FFF; xw = x[u]; nxw = xw - zl; cc += nxw >> 31; nxw &= 0x7FFF; x[u] = nxw; tb = MUX(EQ(nxw, mw), tb, GT(nxw, mw)); } /* * If we underestimated q, then either cc < hi (one extra bit * beyond the top array word), or cc == hi and tb is true (no * extra bit, but the result is not lower than the modulus). * * If we overestimated q, then cc > hi. */ over = GT(cc, hi); under = ~over & (tb | LT(cc, hi)); br_i15_add(x, m, over); br_i15_sub(x, m, under); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint16_t br_i15_ninv15(uint16_t x) { uint32_t y; y = 2 - x; y = MUL15(y, 2 - MUL15(x, y)); y = MUL15(y, 2 - MUL15(x, y)); y = MUL15(y, 2 - MUL15(x, y)); return MUX(x & 1, -y, 0) & 0x7FFF; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_reduce(uint16_t *x, const uint16_t *a, const uint16_t *m) { uint32_t m_bitlen, a_bitlen; size_t mlen, alen, u; m_bitlen = m[0]; mlen = (m_bitlen + 15) >> 4; x[0] = m_bitlen; if (m_bitlen == 0) { return; } /* * If the source is shorter, then simply copy all words from a[] * and zero out the upper words. */ a_bitlen = a[0]; alen = (a_bitlen + 15) >> 4; if (a_bitlen < m_bitlen) { memcpy(x + 1, a + 1, alen * sizeof *a); for (u = alen; u < mlen; u ++) { x[u + 1] = 0; } return; } /* * The source length is at least equal to that of the modulus. * We must thus copy N-1 words, and input the remaining words * one by one. */ memcpy(x + 1, a + 2 + (alen - mlen), (mlen - 1) * sizeof *a); x[mlen] = 0; for (u = 1 + alen - mlen; u > 0; u --) { br_i15_muladd_small(x, a[u], m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_rshift(uint16_t *x, int count) { size_t u, len; unsigned r; len = (x[0] + 15) >> 4; if (len == 0) { return; } r = x[1] >> count; for (u = 2; u <= len; u ++) { unsigned w; w = x[u]; x[u - 1] = ((w << (15 - count)) | r) & 0x7FFF; r = w >> count; } x[len] = r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i15_sub(uint16_t *a, const uint16_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 31) >> 4; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw - bw - cc; cc = naw >> 31; a[u] = MUX(ctl, naw & 0x7FFF, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i15_to_monty(uint16_t *x, const uint16_t *m) { unsigned k; for (k = (m[0] + 15) >> 4; k > 0; k --) { br_i15_muladd_small(x, 0, m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_add(uint32_t *a, const uint32_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 63) >> 5; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw + bw + cc; cc = naw >> 31; a[u] = MUX(ctl, naw & (uint32_t)0x7FFFFFFF, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_bit_length(uint32_t *x, size_t xlen) { uint32_t tw, twk; tw = 0; twk = 0; while (xlen -- > 0) { uint32_t w, c; c = EQ(tw, 0); w = x[xlen]; tw = MUX(c, w, tw); twk = MUX(c, (uint32_t)xlen, twk); } return (twk << 5) + BIT_LENGTH(tw); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_decode_mod(uint32_t *x, const void *src, size_t len, const uint32_t *m) { /* * Two-pass algorithm: in the first pass, we determine whether the * value fits; in the second pass, we do the actual write. * * During the first pass, 'r' contains the comparison result so * far: * 0x00000000 value is equal to the modulus * 0x00000001 value is greater than the modulus * 0xFFFFFFFF value is lower than the modulus * * Since we iterate starting with the least significant bytes (at * the end of src[]), each new comparison overrides the previous * except when the comparison yields 0 (equal). * * During the second pass, 'r' is either 0xFFFFFFFF (value fits) * or 0x00000000 (value does not fit). * * We must iterate over all bytes of the source, _and_ possibly * some extra virtual bytes (with value 0) so as to cover the * complete modulus as well. We also add 4 such extra bytes beyond * the modulus length because it then guarantees that no accumulated * partial word remains to be processed. */ const unsigned char *buf; size_t mlen, tlen; int pass; uint32_t r; buf = (const unsigned char*)src; mlen = (m[0] + 31) >> 5; tlen = (mlen << 2); if (tlen < len) { tlen = len; } tlen += 4; r = 0; for (pass = 0; pass < 2; pass ++) { size_t u, v; uint32_t acc; int acc_len; v = 1; acc = 0; acc_len = 0; for (u = 0; u < tlen; u ++) { uint32_t b; if (u < len) { b = buf[len - 1 - u]; } else { b = 0; } acc |= (b << acc_len); acc_len += 8; if (acc_len >= 31) { uint32_t xw; xw = acc & (uint32_t)0x7FFFFFFF; acc_len -= 31; acc = b >> (8 - acc_len); if (v <= mlen) { if (pass) { x[v] = r & xw; } else { uint32_t cc; cc = (uint32_t)CMP(xw, m[v]); r = MUX(EQ(cc, 0), r, cc); } } else { if (!pass) { r = MUX(EQ(xw, 0), r, 1); } } v ++; } } /* * When we reach this point at the end of the first pass: * r is either 0, 1 or -1; we want to set r to 0 if it * is equal to 0 or 1, and leave it to -1 otherwise. * * When we reach this point at the end of the second pass: * r is either 0 or -1; we want to leave that value * untouched. This is a subcase of the previous. */ r >>= 1; r |= (r << 1); } x[0] = m[0]; return r & (uint32_t)1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_decode(uint32_t *x, const void *src, size_t len) { const unsigned char *buf; size_t u, v; uint32_t acc; int acc_len; buf = (const unsigned char*)src; u = len; v = 1; acc = 0; acc_len = 0; while (u -- > 0) { uint32_t b; b = buf[u]; acc |= (b << acc_len); acc_len += 8; if (acc_len >= 31) { x[v ++] = acc & (uint32_t)0x7FFFFFFF; acc_len -= 31; acc = b >> (8 - acc_len); } } if (acc_len != 0) { x[v ++] = acc; } x[0] = br_i31_bit_length(x + 1, v - 1); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_decode_reduce(uint32_t *x, const void *src, size_t len, const uint32_t *m) { uint32_t m_ebitlen, m_rbitlen; size_t mblen, k; const unsigned char *buf; uint32_t acc; int acc_len; /* * Get the encoded bit length. */ m_ebitlen = m[0]; /* * Special case for an invalid (null) modulus. */ if (m_ebitlen == 0) { x[0] = 0; return; } /* * Clear the destination. */ br_i31_zero(x, m_ebitlen); /* * First decode directly as many bytes as possible. This requires * computing the actual bit length. */ m_rbitlen = m_ebitlen >> 5; m_rbitlen = (m_ebitlen & 31) + (m_rbitlen << 5) - m_rbitlen; mblen = (m_rbitlen + 7) >> 3; k = mblen - 1; if (k >= len) { br_i31_decode(x, src, len); x[0] = m_ebitlen; return; } buf = (const unsigned char*)src; br_i31_decode(x, buf, k); x[0] = m_ebitlen; /* * Input remaining bytes, using 31-bit words. */ acc = 0; acc_len = 0; while (k < len) { uint32_t v; v = buf[k ++]; if (acc_len >= 23) { acc_len -= 23; acc <<= (8 - acc_len); acc |= v >> acc_len; br_i31_muladd_small(x, acc, m); acc = v & (0xFF >> (8 - acc_len)); } else { acc = (acc << 8) | v; acc_len += 8; } } /* * We may have some bits accumulated. We then perform a shift to * be able to inject these bits as a full 31-bit word. */ if (acc_len != 0) { acc = (acc | (x[1] << acc_len)) & 0x7FFFFFFF; br_i31_rshift(x, 31 - acc_len); br_i31_muladd_small(x, acc, m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_encode(void *dst, size_t len, const uint32_t *x) { unsigned char *buf; size_t k, xlen; uint32_t acc; int acc_len; xlen = (x[0] + 31) >> 5; if (xlen == 0) { memset(dst, 0, len); return; } buf = (unsigned char *)dst + len; k = 1; acc = 0; acc_len = 0; while (len != 0) { uint32_t w; w = (k <= xlen) ? x[k] : 0; k ++; if (acc_len == 0) { acc = w; acc_len = 31; } else { uint32_t z; z = acc | (w << acc_len); acc_len --; acc = w >> (31 - acc_len); if (len >= 4) { buf -= 4; len -= 4; br_enc32be(buf, z); } else { switch (len) { case 3: buf[-3] = (unsigned char)(z >> 16); /* fall through */ case 2: buf[-2] = (unsigned char)(z >> 8); /* fall through */ case 1: buf[-1] = (unsigned char)z; break; } return; } } } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_from_monty(uint32_t *x, const uint32_t *m, uint32_t m0i) { size_t len, u, v; len = (m[0] + 31) >> 5; for (u = 0; u < len; u ++) { uint32_t f; uint64_t cc; f = MUL31_lo(x[1], m0i); cc = 0; for (v = 0; v < len; v ++) { uint64_t z; z = (uint64_t)x[v + 1] + MUL31(f, m[v + 1]) + cc; cc = z >> 31; if (v != 0) { x[v] = (uint32_t)z & 0x7FFFFFFF; } } x[len] = (uint32_t)cc; } /* * We may have to do an extra subtraction, but only if the * value in x[] is indeed greater than or equal to that of m[], * which is why we must do two calls (first call computes the * carry, second call performs the subtraction only if the carry * is 0). */ br_i31_sub(x, m, NOT(br_i31_sub(x, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_iszero(const uint32_t *x) { uint32_t z; size_t u; z = 0; for (u = (x[0] + 31) >> 5; u > 0; u --) { z |= x[u]; } return ~(z | -z) >> 31; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * In this file, we handle big integers with a custom format, i.e. * without the usual one-word header. Value is split into 31-bit words, * each stored in a 32-bit slot (top bit is zero) in little-endian * order. The length (in words) is provided explicitly. In some cases, * the value can be negative (using two's complement representation). In * some cases, the top word is allowed to have a 32th bit. */ /* * Negate big integer conditionally. The value consists of 'len' words, * with 31 bits in each word (the top bit of each word should be 0, * except possibly for the last word). If 'ctl' is 1, the negation is * computed; otherwise, if 'ctl' is 0, then the value is unchanged. */ static void _src_int_i31_moddiv_ccond_negate(uint32_t *a, size_t len, uint32_t ctl) { size_t k; uint32_t cc, xm; cc = ctl; xm = -ctl >> 1; for (k = 0; k < len; k ++) { uint32_t aw; aw = a[k]; aw = (aw ^ xm) + cc; a[k] = aw & 0x7FFFFFFF; cc = aw >> 31; } } /* * Finish modular reduction. Rules on input parameters: * * if neg = 1, then -m <= a < 0 * if neg = 0, then 0 <= a < 2*m * * If neg = 0, then the top word of a[] may use 32 bits. * * Also, modulus m must be odd. */ static void _src_int_i31_moddiv_cfinish_mod(uint32_t *a, size_t len, const uint32_t *m, uint32_t neg) { size_t k; uint32_t cc, xm, ym; /* * First pass: compare a (assumed nonnegative) with m. * Note that if the final word uses the top extra bit, then * subtracting m must yield a value less than 2^31, since we * assumed that a < 2*m. */ cc = 0; for (k = 0; k < len; k ++) { uint32_t aw, mw; aw = a[k]; mw = m[k]; cc = (aw - mw - cc) >> 31; } /* * At this point: * if neg = 1, then we must add m (regardless of cc) * if neg = 0 and cc = 0, then we must subtract m * if neg = 0 and cc = 1, then we must do nothing */ xm = -neg >> 1; ym = -(neg | (1 - cc)); cc = neg; for (k = 0; k < len; k ++) { uint32_t aw, mw; aw = a[k]; mw = (m[k] ^ xm) & ym; aw = aw - mw - cc; a[k] = aw & 0x7FFFFFFF; cc = aw >> 31; } } /* * Compute: * a <- (a*pa+b*pb)/(2^31) * b <- (a*qa+b*qb)/(2^31) * The division is assumed to be exact (i.e. the low word is dropped). * If the final a is negative, then it is negated. Similarly for b. * Returned value is the combination of two bits: * bit 0: 1 if a had to be negated, 0 otherwise * bit 1: 1 if b had to be negated, 0 otherwise * * Factors pa, pb, qa and qb must be at most 2^31 in absolute value. * Source integers a and b must be nonnegative; top word is not allowed * to contain an extra 32th bit. */ static uint32_t _src_int_i31_moddiv_cco_reduce(uint32_t *a, uint32_t *b, size_t len, int64_t pa, int64_t pb, int64_t qa, int64_t qb) { size_t k; int64_t cca, ccb; uint32_t nega, negb; cca = 0; ccb = 0; for (k = 0; k < len; k ++) { uint32_t wa, wb; uint64_t za, zb; uint64_t tta, ttb; /* * Since: * |pa| <= 2^31 * |pb| <= 2^31 * 0 <= wa <= 2^31 - 1 * 0 <= wb <= 2^31 - 1 * |cca| <= 2^32 - 1 * Then: * |za| <= (2^31-1)*(2^32) + (2^32-1) = 2^63 - 1 * * Thus, the new value of cca is such that |cca| <= 2^32 - 1. * The same applies to ccb. */ wa = a[k]; wb = b[k]; za = wa * (uint64_t)pa + wb * (uint64_t)pb + (uint64_t)cca; zb = wa * (uint64_t)qa + wb * (uint64_t)qb + (uint64_t)ccb; if (k > 0) { a[k - 1] = za & 0x7FFFFFFF; b[k - 1] = zb & 0x7FFFFFFF; } /* * For the new values of cca and ccb, we need a signed * right-shift; since, in C, right-shifting a signed * negative value is implementation-defined, we use a * custom portable sign extension expression. */ #define M ((uint64_t)1 << 32) tta = za >> 31; ttb = zb >> 31; tta = (tta ^ M) - M; ttb = (ttb ^ M) - M; cca = *(int64_t *)&tta; ccb = *(int64_t *)&ttb; #undef M } a[len - 1] = (uint32_t)cca; b[len - 1] = (uint32_t)ccb; nega = (uint32_t)((uint64_t)cca >> 63); negb = (uint32_t)((uint64_t)ccb >> 63); _src_int_i31_moddiv_ccond_negate(a, len, nega); _src_int_i31_moddiv_ccond_negate(b, len, negb); return nega | (negb << 1); } /* * Compute: * a <- (a*pa+b*pb)/(2^31) mod m * b <- (a*qa+b*qb)/(2^31) mod m * * m0i is equal to -1/m[0] mod 2^31. * * Factors pa, pb, qa and qb must be at most 2^31 in absolute value. * Source integers a and b must be nonnegative; top word is not allowed * to contain an extra 32th bit. */ static void _src_int_i31_moddiv_cco_reduce_mod(uint32_t *a, uint32_t *b, size_t len, int64_t pa, int64_t pb, int64_t qa, int64_t qb, const uint32_t *m, uint32_t m0i) { size_t k; int64_t cca, ccb; uint32_t fa, fb; cca = 0; ccb = 0; fa = ((a[0] * (uint32_t)pa + b[0] * (uint32_t)pb) * m0i) & 0x7FFFFFFF; fb = ((a[0] * (uint32_t)qa + b[0] * (uint32_t)qb) * m0i) & 0x7FFFFFFF; for (k = 0; k < len; k ++) { uint32_t wa, wb; uint64_t za, zb; uint64_t tta, ttb; /* * In this loop, carries 'cca' and 'ccb' always fit on * 33 bits (in absolute value). */ wa = a[k]; wb = b[k]; za = wa * (uint64_t)pa + wb * (uint64_t)pb + m[k] * (uint64_t)fa + (uint64_t)cca; zb = wa * (uint64_t)qa + wb * (uint64_t)qb + m[k] * (uint64_t)fb + (uint64_t)ccb; if (k > 0) { a[k - 1] = (uint32_t)za & 0x7FFFFFFF; b[k - 1] = (uint32_t)zb & 0x7FFFFFFF; } #define M ((uint64_t)1 << 32) tta = za >> 31; ttb = zb >> 31; tta = (tta ^ M) - M; ttb = (ttb ^ M) - M; cca = *(int64_t *)&tta; ccb = *(int64_t *)&ttb; #undef M } a[len - 1] = (uint32_t)cca; b[len - 1] = (uint32_t)ccb; /* * At this point: * -m <= a < 2*m * -m <= b < 2*m * (this is a case of Montgomery reduction) * The top word of 'a' and 'b' may have a 32-th bit set. * We may have to add or subtract the modulus. */ _src_int_i31_moddiv_cfinish_mod(a, len, m, (uint32_t)((uint64_t)cca >> 63)); _src_int_i31_moddiv_cfinish_mod(b, len, m, (uint32_t)((uint64_t)ccb >> 63)); } /* see inner.h */ uint32_t br_i31_moddiv(uint32_t *x, const uint32_t *y, const uint32_t *m, uint32_t m0i, uint32_t *t) { /* * Algorithm is an extended binary GCD. We maintain four values * a, b, u and v, with the following invariants: * * a * x = y * u mod m * b * x = y * v mod m * * Starting values are: * * a = y * b = m * u = x * v = 0 * * The formal definition of the algorithm is a sequence of steps: * * - If a is even, then a <- a/2 and u <- u/2 mod m. * - Otherwise, if b is even, then b <- b/2 and v <- v/2 mod m. * - Otherwise, if a > b, then a <- (a-b)/2 and u <- (u-v)/2 mod m. * - Otherwise, b <- (b-a)/2 and v <- (v-u)/2 mod m. * * Algorithm stops when a = b. At that point, they both are equal * to GCD(y,m); the modular division succeeds if that value is 1. * The result of the modular division is then u (or v: both are * equal at that point). * * Each step makes either a or b shrink by at least one bit; hence, * if m has bit length k bits, then 2k-2 steps are sufficient. * * * Though complexity is quadratic in the size of m, the bit-by-bit * processing is not very efficient. We can speed up processing by * remarking that the decisions are taken based only on observation * of the top and low bits of a and b. * * In the loop below, at each iteration, we use the two top words * of a and b, and the low words of a and b, to compute reduction * parameters pa, pb, qa and qb such that the new values for a * and b are: * * a' = (a*pa + b*pb) / (2^31) * b' = (a*qa + b*qb) / (2^31) * * the division being exact. * * Since the choices are based on the top words, they may be slightly * off, requiring an optional correction: if a' < 0, then we replace * pa with -pa, and pb with -pb. The total length of a and b is * thus reduced by at least 30 bits at each iteration. * * The stopping conditions are still the same, though: when a * and b become equal, they must be both odd (since m is odd, * the GCD cannot be even), therefore the next operation is a * subtraction, and one of the values becomes 0. At that point, * nothing else happens, i.e. one value is stuck at 0, and the * other one is the GCD. */ size_t len, k; uint32_t *a, *b, *u, *v; uint32_t num, r; len = (m[0] + 31) >> 5; a = t; b = a + len; u = x + 1; v = b + len; memcpy(a, y + 1, len * sizeof *y); memcpy(b, m + 1, len * sizeof *m); memset(v, 0, len * sizeof *v); /* * Loop below ensures that a and b are reduced by some bits each, * for a total of at least 30 bits. */ for (num = ((m[0] - (m[0] >> 5)) << 1) + 30; num >= 30; num -= 30) { size_t j; uint32_t c0, c1; uint32_t a0, a1, b0, b1; uint64_t a_hi, b_hi; uint32_t a_lo, b_lo; int64_t pa, pb, qa, qb; int i; /* * Extract top words of a and b. If j is the highest * index >= 1 such that a[j] != 0 or b[j] != 0, then we want * (a[j] << 31) + a[j - 1], and (b[j] << 31) + b[j - 1]. * If a and b are down to one word each, then we use a[0] * and b[0]. */ c0 = (uint32_t)-1; c1 = (uint32_t)-1; a0 = 0; a1 = 0; b0 = 0; b1 = 0; j = len; while (j -- > 0) { uint32_t aw, bw; aw = a[j]; bw = b[j]; a0 ^= (a0 ^ aw) & c0; a1 ^= (a1 ^ aw) & c1; b0 ^= (b0 ^ bw) & c0; b1 ^= (b1 ^ bw) & c1; c1 = c0; c0 &= (((aw | bw) + 0x7FFFFFFF) >> 31) - (uint32_t)1; } /* * If c1 = 0, then we grabbed two words for a and b. * If c1 != 0 but c0 = 0, then we grabbed one word. It * is not possible that c1 != 0 and c0 != 0, because that * would mean that both integers are zero. */ a1 |= a0 & c1; a0 &= ~c1; b1 |= b0 & c1; b0 &= ~c1; a_hi = ((uint64_t)a0 << 31) + a1; b_hi = ((uint64_t)b0 << 31) + b1; a_lo = a[0]; b_lo = b[0]; /* * Compute reduction factors: * * a' = a*pa + b*pb * b' = a*qa + b*qb * * such that a' and b' are both multiple of 2^31, but are * only marginally larger than a and b. */ pa = 1; pb = 0; qa = 0; qb = 1; for (i = 0; i < 31; i ++) { /* * At each iteration: * * a <- (a-b)/2 if: a is odd, b is odd, a_hi > b_hi * b <- (b-a)/2 if: a is odd, b is odd, a_hi <= b_hi * a <- a/2 if: a is even * b <- b/2 if: a is odd, b is even * * We multiply a_lo and b_lo by 2 at each * iteration, thus a division by 2 really is a * non-multiplication by 2. */ uint32_t r, oa, ob, cAB, cBA, cA; uint64_t rz; /* * r = GT(a_hi, b_hi) * But the GT() function works on uint32_t operands, * so we inline a 64-bit version here. */ rz = b_hi - a_hi; r = (uint32_t)((rz ^ ((a_hi ^ b_hi) & (a_hi ^ rz))) >> 63); /* * cAB = 1 if b must be subtracted from a * cBA = 1 if a must be subtracted from b * cA = 1 if a is divided by 2, 0 otherwise * * Rules: * * cAB and cBA cannot be both 1. * if a is not divided by 2, b is. */ oa = (a_lo >> i) & 1; ob = (b_lo >> i) & 1; cAB = oa & ob & r; cBA = oa & ob & NOT(r); cA = cAB | NOT(oa); /* * Conditional subtractions. */ a_lo -= b_lo & -cAB; a_hi -= b_hi & -(uint64_t)cAB; pa -= qa & -(int64_t)cAB; pb -= qb & -(int64_t)cAB; b_lo -= a_lo & -cBA; b_hi -= a_hi & -(uint64_t)cBA; qa -= pa & -(int64_t)cBA; qb -= pb & -(int64_t)cBA; /* * Shifting. */ a_lo += a_lo & (cA - 1); pa += pa & ((int64_t)cA - 1); pb += pb & ((int64_t)cA - 1); a_hi ^= (a_hi ^ (a_hi >> 1)) & -(uint64_t)cA; b_lo += b_lo & -cA; qa += qa & -(int64_t)cA; qb += qb & -(int64_t)cA; b_hi ^= (b_hi ^ (b_hi >> 1)) & ((uint64_t)cA - 1); } /* * Replace a and b with new values a' and b'. */ r = _src_int_i31_moddiv_cco_reduce(a, b, len, pa, pb, qa, qb); pa -= pa * ((r & 1) << 1); pb -= pb * ((r & 1) << 1); qa -= qa * (r & 2); qb -= qb * (r & 2); _src_int_i31_moddiv_cco_reduce_mod(u, v, len, pa, pb, qa, qb, m + 1, m0i); } /* * Now one of the arrays should be 0, and the other contains * the GCD. If a is 0, then u is 0 as well, and v contains * the division result. * Result is correct if and only if GCD is 1. */ r = (a[0] | b[0]) ^ 1; u[0] |= v[0]; for (k = 1; k < len; k ++) { r |= a[k] | b[k]; u[k] |= v[k]; } return EQ0(r); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_modpow(uint32_t *x, const unsigned char *e, size_t elen, const uint32_t *m, uint32_t m0i, uint32_t *t1, uint32_t *t2) { size_t mlen; uint32_t k; /* * 'mlen' is the length of m[] expressed in bytes (including * the "bit length" first field). */ mlen = ((m[0] + 63) >> 5) * sizeof m[0]; /* * Throughout the algorithm: * -- t1[] is in Montgomery representation; it contains x, x^2, * x^4, x^8... * -- The result is accumulated, in normal representation, in * the x[] array. * -- t2[] is used as destination buffer for each multiplication. * * Note that there is no need to call br_i32_from_monty(). */ memcpy(t1, x, mlen); br_i31_to_monty(t1, m); br_i31_zero(x, m[0]); x[1] = 1; for (k = 0; k < ((uint32_t)elen << 3); k ++) { uint32_t ctl; ctl = (e[elen - 1 - (k >> 3)] >> (k & 7)) & 1; br_i31_montymul(t2, x, t1, m, m0i); CCOPY(ctl, x, t2, mlen); br_i31_montymul(t2, t1, t1, m, m0i); memcpy(t1, t2, mlen); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_modpow_opt(uint32_t *x, const unsigned char *e, size_t elen, const uint32_t *m, uint32_t m0i, uint32_t *tmp, size_t twlen) { size_t mlen, mwlen; uint32_t *t1, *t2, *base; size_t u, v; uint32_t acc; int acc_len, win_len; /* * Get modulus size. */ mwlen = (m[0] + 63) >> 5; mlen = mwlen * sizeof m[0]; mwlen += (mwlen & 1); t1 = tmp; t2 = tmp + mwlen; /* * Compute possible window size, with a maximum of 5 bits. * When the window has size 1 bit, we use a specific code * that requires only two temporaries. Otherwise, for a * window of k bits, we need 2^k+1 temporaries. */ if (twlen < (mwlen << 1)) { return 0; } for (win_len = 5; win_len > 1; win_len --) { if ((((uint32_t)1 << win_len) + 1) * mwlen <= twlen) { break; } } /* * Everything is done in Montgomery representation. */ br_i31_to_monty(x, m); /* * Compute window contents. If the window has size one bit only, * then t2 is set to x; otherwise, t2[0] is left untouched, and * t2[k] is set to x^k (for k >= 1). */ if (win_len == 1) { memcpy(t2, x, mlen); } else { memcpy(t2 + mwlen, x, mlen); base = t2 + mwlen; for (u = 2; u < ((unsigned)1 << win_len); u ++) { br_i31_montymul(base + mwlen, base, x, m, m0i); base += mwlen; } } /* * We need to set x to 1, in Montgomery representation. This can * be done efficiently by setting the high word to 1, then doing * one word-sized shift. */ br_i31_zero(x, m[0]); x[(m[0] + 31) >> 5] = 1; br_i31_muladd_small(x, 0, m); /* * We process bits from most to least significant. At each * loop iteration, we have acc_len bits in acc. */ acc = 0; acc_len = 0; while (acc_len > 0 || elen > 0) { int i, k; uint32_t bits; /* * Get the next bits. */ k = win_len; if (acc_len < win_len) { if (elen > 0) { acc = (acc << 8) | *e ++; elen --; acc_len += 8; } else { k = acc_len; } } bits = (acc >> (acc_len - k)) & (((uint32_t)1 << k) - 1); acc_len -= k; /* * We could get exactly k bits. Compute k squarings. */ for (i = 0; i < k; i ++) { br_i31_montymul(t1, x, x, m, m0i); memcpy(x, t1, mlen); } /* * Window lookup: we want to set t2 to the window * lookup value, assuming the bits are non-zero. If * the window length is 1 bit only, then t2 is * already set; otherwise, we do a constant-time lookup. */ if (win_len > 1) { br_i31_zero(t2, m[0]); base = t2 + mwlen; for (u = 1; u < ((uint32_t)1 << k); u ++) { uint32_t mask; mask = -EQ(u, bits); for (v = 1; v < mwlen; v ++) { t2[v] |= mask & base[v]; } base += mwlen; } } /* * Multiply with the looked-up value. We keep the * product only if the exponent bits are not all-zero. */ br_i31_montymul(t1, x, t2, m, m0i); CCOPY(NEQ(bits, 0), x, t1, mlen); } /* * Convert back from Montgomery representation, and exit. */ br_i31_from_monty(x, m, m0i); return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_montymul(uint32_t *d, const uint32_t *x, const uint32_t *y, const uint32_t *m, uint32_t m0i) { /* * Each outer loop iteration computes: * d <- (d + xu*y + f*m) / 2^31 * We have xu <= 2^31-1 and f <= 2^31-1. * Thus, if d <= 2*m-1 on input, then: * 2*m-1 + 2*(2^31-1)*m <= (2^32)*m-1 * and the new d value is less than 2*m. * * We represent d over 31-bit words, with an extra word 'dh' * which can thus be only 0 or 1. */ size_t len, len4, u, v; uint32_t dh; len = (m[0] + 31) >> 5; len4 = len & ~(size_t)3; br_i31_zero(d, m[0]); dh = 0; for (u = 0; u < len; u ++) { /* * The carry for each operation fits on 32 bits: * d[v+1] <= 2^31-1 * xu*y[v+1] <= (2^31-1)*(2^31-1) * f*m[v+1] <= (2^31-1)*(2^31-1) * r <= 2^32-1 * (2^31-1) + 2*(2^31-1)*(2^31-1) + (2^32-1) = 2^63 - 2^31 * After division by 2^31, the new r is then at most 2^32-1 * * Using a 32-bit carry has performance benefits on 32-bit * systems; however, on 64-bit architectures, we prefer to * keep the carry (r) in a 64-bit register, thus avoiding some * "clear high bits" operations. */ uint32_t f, xu; #if BR_64 uint64_t r; #else uint32_t r; #endif xu = x[u + 1]; f = MUL31_lo((d[1] + MUL31_lo(x[u + 1], y[1])), m0i); r = 0; for (v = 0; v < len4; v += 4) { uint64_t z; z = (uint64_t)d[v + 1] + MUL31(xu, y[v + 1]) + MUL31(f, m[v + 1]) + r; r = z >> 31; d[v + 0] = (uint32_t)z & 0x7FFFFFFF; z = (uint64_t)d[v + 2] + MUL31(xu, y[v + 2]) + MUL31(f, m[v + 2]) + r; r = z >> 31; d[v + 1] = (uint32_t)z & 0x7FFFFFFF; z = (uint64_t)d[v + 3] + MUL31(xu, y[v + 3]) + MUL31(f, m[v + 3]) + r; r = z >> 31; d[v + 2] = (uint32_t)z & 0x7FFFFFFF; z = (uint64_t)d[v + 4] + MUL31(xu, y[v + 4]) + MUL31(f, m[v + 4]) + r; r = z >> 31; d[v + 3] = (uint32_t)z & 0x7FFFFFFF; } for (; v < len; v ++) { uint64_t z; z = (uint64_t)d[v + 1] + MUL31(xu, y[v + 1]) + MUL31(f, m[v + 1]) + r; r = z >> 31; d[v] = (uint32_t)z & 0x7FFFFFFF; } /* * Since the new dh can only be 0 or 1, the addition of * the old dh with the carry MUST fit on 32 bits, and * thus can be done into dh itself. */ dh += r; d[len] = dh & 0x7FFFFFFF; dh >>= 31; } /* * We must write back the bit length because it was overwritten in * the loop (not overwriting it would require a test in the loop, * which would yield bigger and slower code). */ d[0] = m[0]; /* * d[] may still be greater than m[] at that point; notably, the * 'dh' word may be non-zero. */ br_i31_sub(d, m, NEQ(dh, 0) | NOT(br_i31_sub(d, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_mulacc(uint32_t *d, const uint32_t *a, const uint32_t *b) { size_t alen, blen, u; uint32_t dl, dh; alen = (a[0] + 31) >> 5; blen = (b[0] + 31) >> 5; /* * We want to add the two bit lengths, but these are encoded, * which requires some extra care. */ dl = (a[0] & 31) + (b[0] & 31); dh = (a[0] >> 5) + (b[0] >> 5); d[0] = (dh << 5) + dl + (~(uint32_t)(dl - 31) >> 31); for (u = 0; u < blen; u ++) { uint32_t f; size_t v; /* * Carry always fits on 31 bits; we want to keep it in a * 32-bit register on 32-bit architectures (on a 64-bit * architecture, cast down from 64 to 32 bits means * clearing the high bits, which is not free; on a 32-bit * architecture, the same operation really means ignoring * the top register, which has negative or zero cost). */ #if BR_64 uint64_t cc; #else uint32_t cc; #endif f = b[1 + u]; cc = 0; for (v = 0; v < alen; v ++) { uint64_t z; z = (uint64_t)d[1 + u + v] + MUL31(f, a[1 + v]) + cc; cc = z >> 31; d[1 + u + v] = (uint32_t)z & 0x7FFFFFFF; } d[1 + u + alen] = (uint32_t)cc; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_muladd_small(uint32_t *x, uint32_t z, const uint32_t *m) { uint32_t m_bitlen; unsigned mblr; size_t u, mlen; uint32_t a0, a1, b0, hi, g, q, tb; uint32_t under, over; uint32_t cc; /* * We can test on the modulus bit length since we accept to * leak that length. */ m_bitlen = m[0]; if (m_bitlen == 0) { return; } if (m_bitlen <= 31) { uint32_t lo; hi = x[1] >> 1; lo = (x[1] << 31) | z; x[1] = br_rem(hi, lo, m[1]); return; } mlen = (m_bitlen + 31) >> 5; mblr = (unsigned)m_bitlen & 31; /* * Principle: we estimate the quotient (x*2^31+z)/m by * doing a 64/32 division with the high words. * * Let: * w = 2^31 * a = (w*a0 + a1) * w^N + a2 * b = b0 * w^N + b2 * such that: * 0 <= a0 < w * 0 <= a1 < w * 0 <= a2 < w^N * w/2 <= b0 < w * 0 <= b2 < w^N * a < w*b * I.e. the two top words of a are a0:a1, the top word of b is * b0, we ensured that b0 is "full" (high bit set), and a is * such that the quotient q = a/b fits on one word (0 <= q < w). * * If a = b*q + r (with 0 <= r < q), we can estimate q by * doing an Euclidean division on the top words: * a0*w+a1 = b0*u + v (with 0 <= v < b0) * Then the following holds: * 0 <= u <= w * u-2 <= q <= u */ hi = x[mlen]; if (mblr == 0) { a0 = x[mlen]; memmove(x + 2, x + 1, (mlen - 1) * sizeof *x); x[1] = z; a1 = x[mlen]; b0 = m[mlen]; } else { a0 = ((x[mlen] << (31 - mblr)) | (x[mlen - 1] >> mblr)) & 0x7FFFFFFF; memmove(x + 2, x + 1, (mlen - 1) * sizeof *x); x[1] = z; a1 = ((x[mlen] << (31 - mblr)) | (x[mlen - 1] >> mblr)) & 0x7FFFFFFF; b0 = ((m[mlen] << (31 - mblr)) | (m[mlen - 1] >> mblr)) & 0x7FFFFFFF; } /* * We estimate a divisor q. If the quotient returned by br_div() * is g: * -- If a0 == b0 then g == 0; we want q = 0x7FFFFFFF. * -- Otherwise: * -- if g == 0 then we set q = 0; * -- otherwise, we set q = g - 1. * The properties described above then ensure that the true * quotient is q-1, q or q+1. * * Take care that a0, a1 and b0 are 31-bit words, not 32-bit. We * must adjust the parameters to br_div() accordingly. */ g = br_div(a0 >> 1, a1 | (a0 << 31), b0); q = MUX(EQ(a0, b0), 0x7FFFFFFF, MUX(EQ(g, 0), 0, g - 1)); /* * We subtract q*m from x (with the extra high word of value 'hi'). * Since q may be off by 1 (in either direction), we may have to * add or subtract m afterwards. * * The 'tb' flag will be true (1) at the end of the loop if the * result is greater than or equal to the modulus (not counting * 'hi' or the carry). */ cc = 0; tb = 1; for (u = 1; u <= mlen; u ++) { uint32_t mw, zw, xw, nxw; uint64_t zl; mw = m[u]; zl = MUL31(mw, q) + cc; cc = (uint32_t)(zl >> 31); zw = (uint32_t)zl & (uint32_t)0x7FFFFFFF; xw = x[u]; nxw = xw - zw; cc += nxw >> 31; nxw &= 0x7FFFFFFF; x[u] = nxw; tb = MUX(EQ(nxw, mw), tb, GT(nxw, mw)); } /* * If we underestimated q, then either cc < hi (one extra bit * beyond the top array word), or cc == hi and tb is true (no * extra bit, but the result is not lower than the modulus). In * these cases we must subtract m once. * * Otherwise, we may have overestimated, which will show as * cc > hi (thus a negative result). Correction is adding m once. */ over = GT(cc, hi); under = ~over & (tb | LT(cc, hi)); br_i31_add(x, m, over); br_i31_sub(x, m, under); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_ninv31(uint32_t x) { uint32_t y; y = 2 - x; y *= 2 - y * x; y *= 2 - y * x; y *= 2 - y * x; y *= 2 - y * x; return MUX(x & 1, -y, 0) & 0x7FFFFFFF; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_reduce(uint32_t *x, const uint32_t *a, const uint32_t *m) { uint32_t m_bitlen, a_bitlen; size_t mlen, alen, u; m_bitlen = m[0]; mlen = (m_bitlen + 31) >> 5; x[0] = m_bitlen; if (m_bitlen == 0) { return; } /* * If the source is shorter, then simply copy all words from a[] * and zero out the upper words. */ a_bitlen = a[0]; alen = (a_bitlen + 31) >> 5; if (a_bitlen < m_bitlen) { memcpy(x + 1, a + 1, alen * sizeof *a); for (u = alen; u < mlen; u ++) { x[u + 1] = 0; } return; } /* * The source length is at least equal to that of the modulus. * We must thus copy N-1 words, and input the remaining words * one by one. */ memcpy(x + 1, a + 2 + (alen - mlen), (mlen - 1) * sizeof *a); x[mlen] = 0; for (u = 1 + alen - mlen; u > 0; u --) { br_i31_muladd_small(x, a[u], m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_rshift(uint32_t *x, int count) { size_t u, len; uint32_t r; len = (x[0] + 31) >> 5; if (len == 0) { return; } r = x[1] >> count; for (u = 2; u <= len; u ++) { uint32_t w; w = x[u]; x[u - 1] = ((w << (31 - count)) | r) & 0x7FFFFFFF; r = w >> count; } x[len] = r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i31_sub(uint32_t *a, const uint32_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 63) >> 5; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw - bw - cc; cc = naw >> 31; a[u] = MUX(ctl, naw & 0x7FFFFFFF, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i31_to_monty(uint32_t *x, const uint32_t *m) { uint32_t k; for (k = (m[0] + 31) >> 5; k > 0; k --) { br_i31_muladd_small(x, 0, m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_add(uint32_t *a, const uint32_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 63) >> 5; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw + bw + cc; /* * Carry is 1 if naw < aw. Carry is also 1 if naw == aw * AND the carry was already 1. */ cc = (cc & EQ(naw, aw)) | LT(naw, aw); a[u] = MUX(ctl, naw, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_bit_length(uint32_t *x, size_t xlen) { uint32_t tw, twk; tw = 0; twk = 0; while (xlen -- > 0) { uint32_t w, c; c = EQ(tw, 0); w = x[xlen]; tw = MUX(c, w, tw); twk = MUX(c, (uint32_t)xlen, twk); } return (twk << 5) + BIT_LENGTH(tw); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_decode_mod(uint32_t *x, const void *src, size_t len, const uint32_t *m) { const unsigned char *buf; uint32_t r; size_t u, v, mlen; buf = (const unsigned char*)src; /* * First pass: determine whether the value fits. The 'r' value * will contain the comparison result, as 0x00000000 (value is * equal to the modulus), 0x00000001 (value is greater than the * modulus), or 0xFFFFFFFF (value is lower than the modulus). */ mlen = (m[0] + 7) >> 3; r = 0; for (u = (mlen > len) ? mlen : len; u > 0; u --) { uint32_t mb, xb; v = u - 1; if (v >= mlen) { mb = 0; } else { mb = (m[1 + (v >> 2)] >> ((v & 3) << 3)) & 0xFF; } if (v >= len) { xb = 0; } else { xb = buf[len - u]; } r = MUX(EQ(r, 0), (uint32_t)CMP(xb, mb), r); } /* * Only r == 0xFFFFFFFF is acceptable. We want to set r to 0xFF if * the value fits, 0x00 otherwise. */ r >>= 24; br_i32_zero(x, m[0]); u = (mlen > len) ? len : mlen; while (u > 0) { uint32_t xb; xb = buf[len - u] & r; u --; x[1 + (u >> 2)] |= xb << ((u & 3) << 3); } return r >> 7; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_decode(uint32_t *x, const void *src, size_t len) { const unsigned char *buf; size_t u, v; buf = (const unsigned char*)src; u = len; v = 1; for (;;) { if (u < 4) { uint32_t w; if (u < 2) { if (u == 0) { break; } else { w = buf[0]; } } else { if (u == 2) { w = br_dec16be(buf); } else { w = ((uint32_t)buf[0] << 16) | br_dec16be(buf + 1); } } x[v ++] = w; break; } else { u -= 4; x[v ++] = br_dec32be(buf + u); } } x[0] = br_i32_bit_length(x + 1, v - 1); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_decode_reduce(uint32_t *x, const void *src, size_t len, const uint32_t *m) { uint32_t m_bitlen; size_t mblen, k, q; const unsigned char *buf; m_bitlen = m[0]; /* * Special case for an invalid modulus. */ if (m_bitlen == 0) { x[0] = 0; return; } /* * Clear the destination. */ br_i32_zero(x, m_bitlen); /* * First decode directly as many bytes as possible without * reduction, taking care to leave a number of bytes which * is a multiple of 4. */ mblen = (m_bitlen + 7) >> 3; k = mblen - 1; /* * Up to k bytes can be safely decoded. */ if (k >= len) { br_i32_decode(x, src, len); x[0] = m_bitlen; return; } /* * We want to first inject some bytes with direct decoding, * then extra bytes by whole 32-bit words. First compute * the size that should be injected that way. */ buf = (const unsigned char*)src; q = (len - k + 3) & ~(size_t)3; /* * It may happen that this is more than what we already have * (by at most 3 bytes). Such a case may happen only with * a very short modulus. In that case, we must process the first * bytes "manually". */ if (q > len) { int i; uint32_t w; w = 0; for (i = 0; i < 4; i ++) { w <<= 8; if (q <= len) { w |= buf[len - q]; } q --; } br_i32_muladd_small(x, w, m); } else { br_i32_decode(x, buf, len - q); x[0] = m_bitlen; } /* * At that point, we have exactly q bytes to inject, and q is * a multiple of 4. */ for (k = len - q; k < len; k += 4) { br_i32_muladd_small(x, br_dec32be(buf + k), m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_divrem(uint32_t hi, uint32_t lo, uint32_t d, uint32_t *r) { /* TODO: optimize this */ uint32_t q; uint32_t ch, cf; int k; q = 0; ch = EQ(hi, d); hi = MUX(ch, 0, hi); for (k = 31; k > 0; k --) { int j; uint32_t w, ctl, hi2, lo2; j = 32 - k; w = (hi << j) | (lo >> k); ctl = GE(w, d) | (hi >> k); hi2 = (w - d) >> j; lo2 = lo - (d << k); hi = MUX(ctl, hi2, hi); lo = MUX(ctl, lo2, lo); q |= ctl << k; } cf = GE(lo, d) | hi; q |= cf; *r = MUX(cf, lo - d, lo); return q; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_encode(void *dst, size_t len, const uint32_t *x) { unsigned char *buf; size_t k; buf = (unsigned char*)dst; /* * Compute the announced size of x in bytes; extra bytes are * filled with zeros. */ k = (x[0] + 7) >> 3; while (len > k) { *buf ++ = 0; len --; } /* * Now we use k as index within x[]. That index starts at 1; * we initialize it to the topmost complete word, and process * any remaining incomplete word. */ k = (len + 3) >> 2; switch (len & 3) { case 3: *buf ++ = x[k] >> 16; /* fall through */ case 2: *buf ++ = x[k] >> 8; /* fall through */ case 1: *buf ++ = x[k]; k --; } /* * Encode all complete words. */ while (k > 0) { br_enc32be(buf, x[k]); k --; buf += 4; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_from_monty(uint32_t *x, const uint32_t *m, uint32_t m0i) { size_t len, u, v; len = (m[0] + 31) >> 5; for (u = 0; u < len; u ++) { uint32_t f; uint64_t cc; f = x[1] * m0i; cc = 0; for (v = 0; v < len; v ++) { uint64_t z; z = (uint64_t)x[v + 1] + MUL(f, m[v + 1]) + cc; cc = z >> 32; if (v != 0) { x[v] = (uint32_t)z; } } x[len] = (uint32_t)cc; } /* * We may have to do an extra subtraction, but only if the * value in x[] is indeed greater than or equal to that of m[], * which is why we must do two calls (first call computes the * carry, second call performs the subtraction only if the carry * is 0). */ br_i32_sub(x, m, NOT(br_i32_sub(x, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_iszero(const uint32_t *x) { uint32_t z; size_t u; z = 0; for (u = (x[0] + 31) >> 5; u > 0; u --) { z |= x[u]; } return ~(z | -z) >> 31; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_modpow(uint32_t *x, const unsigned char *e, size_t elen, const uint32_t *m, uint32_t m0i, uint32_t *t1, uint32_t *t2) { size_t mlen; uint32_t k; /* * 'mlen' is the length of m[] expressed in bytes (including * the "bit length" first field). */ mlen = ((m[0] + 63) >> 5) * sizeof m[0]; /* * Throughout the algorithm: * -- t1[] is in Montgomery representation; it contains x, x^2, * x^4, x^8... * -- The result is accumulated, in normal representation, in * the x[] array. * -- t2[] is used as destination buffer for each multiplication. * * Note that there is no need to call br_i32_from_monty(). */ memcpy(t1, x, mlen); br_i32_to_monty(t1, m); br_i32_zero(x, m[0]); x[1] = 1; for (k = 0; k < ((uint32_t)elen << 3); k ++) { uint32_t ctl; ctl = (e[elen - 1 - (k >> 3)] >> (k & 7)) & 1; br_i32_montymul(t2, x, t1, m, m0i); CCOPY(ctl, x, t2, mlen); br_i32_montymul(t2, t1, t1, m, m0i); memcpy(t1, t2, mlen); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_montymul(uint32_t *d, const uint32_t *x, const uint32_t *y, const uint32_t *m, uint32_t m0i) { size_t len, u, v; uint64_t dh; len = (m[0] + 31) >> 5; br_i32_zero(d, m[0]); dh = 0; for (u = 0; u < len; u ++) { uint32_t f, xu; uint64_t r1, r2, zh; xu = x[u + 1]; f = (d[1] + x[u + 1] * y[1]) * m0i; r1 = 0; r2 = 0; for (v = 0; v < len; v ++) { uint64_t z; uint32_t t; z = (uint64_t)d[v + 1] + MUL(xu, y[v + 1]) + r1; r1 = z >> 32; t = (uint32_t)z; z = (uint64_t)t + MUL(f, m[v + 1]) + r2; r2 = z >> 32; if (v != 0) { d[v] = (uint32_t)z; } } zh = dh + r1 + r2; d[len] = (uint32_t)zh; dh = zh >> 32; } /* * d[] may still be greater than m[] at that point; notably, the * 'dh' word may be non-zero. */ br_i32_sub(d, m, NEQ(dh, 0) | NOT(br_i32_sub(d, m, 0))); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_mulacc(uint32_t *d, const uint32_t *a, const uint32_t *b) { size_t alen, blen, u; alen = (a[0] + 31) >> 5; blen = (b[0] + 31) >> 5; d[0] = a[0] + b[0]; for (u = 0; u < blen; u ++) { uint32_t f; size_t v; #if BR_64 uint64_t cc; #else uint32_t cc; #endif f = b[1 + u]; cc = 0; for (v = 0; v < alen; v ++) { uint64_t z; z = (uint64_t)d[1 + u + v] + MUL(f, a[1 + v]) + cc; cc = z >> 32; d[1 + u + v] = (uint32_t)z; } d[1 + u + alen] = (uint32_t)cc; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_muladd_small(uint32_t *x, uint32_t z, const uint32_t *m) { uint32_t m_bitlen; size_t u, mlen; uint32_t a0, a1, b0, hi, g, q, tb; uint32_t chf, clow, under, over; uint64_t cc; /* * We can test on the modulus bit length since we accept to * leak that length. */ m_bitlen = m[0]; if (m_bitlen == 0) { return; } if (m_bitlen <= 32) { x[1] = br_rem(x[1], z, m[1]); return; } mlen = (m_bitlen + 31) >> 5; /* * Principle: we estimate the quotient (x*2^32+z)/m by * doing a 64/32 division with the high words. * * Let: * w = 2^32 * a = (w*a0 + a1) * w^N + a2 * b = b0 * w^N + b2 * such that: * 0 <= a0 < w * 0 <= a1 < w * 0 <= a2 < w^N * w/2 <= b0 < w * 0 <= b2 < w^N * a < w*b * I.e. the two top words of a are a0:a1, the top word of b is * b0, we ensured that b0 is "full" (high bit set), and a is * such that the quotient q = a/b fits on one word (0 <= q < w). * * If a = b*q + r (with 0 <= r < q), we can estimate q by * doing an Euclidean division on the top words: * a0*w+a1 = b0*u + v (with 0 <= v < w) * Then the following holds: * 0 <= u <= w * u-2 <= q <= u */ a0 = br_i32_word(x, m_bitlen - 32); hi = x[mlen]; memmove(x + 2, x + 1, (mlen - 1) * sizeof *x); x[1] = z; a1 = br_i32_word(x, m_bitlen - 32); b0 = br_i32_word(m, m_bitlen - 32); /* * We estimate a divisor q. If the quotient returned by br_div() * is g: * -- If a0 == b0 then g == 0; we want q = 0xFFFFFFFF. * -- Otherwise: * -- if g == 0 then we set q = 0; * -- otherwise, we set q = g - 1. * The properties described above then ensure that the true * quotient is q-1, q or q+1. */ g = br_div(a0, a1, b0); q = MUX(EQ(a0, b0), 0xFFFFFFFF, MUX(EQ(g, 0), 0, g - 1)); /* * We subtract q*m from x (with the extra high word of value 'hi'). * Since q may be off by 1 (in either direction), we may have to * add or subtract m afterwards. * * The 'tb' flag will be true (1) at the end of the loop if the * result is greater than or equal to the modulus (not counting * 'hi' or the carry). */ cc = 0; tb = 1; for (u = 1; u <= mlen; u ++) { uint32_t mw, zw, xw, nxw; uint64_t zl; mw = m[u]; zl = MUL(mw, q) + cc; cc = (uint32_t)(zl >> 32); zw = (uint32_t)zl; xw = x[u]; nxw = xw - zw; cc += (uint64_t)GT(nxw, xw); x[u] = nxw; tb = MUX(EQ(nxw, mw), tb, GT(nxw, mw)); } /* * If we underestimated q, then either cc < hi (one extra bit * beyond the top array word), or cc == hi and tb is true (no * extra bit, but the result is not lower than the modulus). In * these cases we must subtract m once. * * Otherwise, we may have overestimated, which will show as * cc > hi (thus a negative result). Correction is adding m once. */ chf = (uint32_t)(cc >> 32); clow = (uint32_t)cc; over = chf | GT(clow, hi); under = ~over & (tb | (~chf & LT(clow, hi))); br_i32_add(x, m, over); br_i32_sub(x, m, under); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_ninv32(uint32_t x) { uint32_t y; y = 2 - x; y *= 2 - y * x; y *= 2 - y * x; y *= 2 - y * x; y *= 2 - y * x; return MUX(x & 1, -y, 0); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_reduce(uint32_t *x, const uint32_t *a, const uint32_t *m) { uint32_t m_bitlen, a_bitlen; size_t mlen, alen, u; m_bitlen = m[0]; mlen = (m_bitlen + 31) >> 5; x[0] = m_bitlen; if (m_bitlen == 0) { return; } /* * If the source is shorter, then simply copy all words from a[] * and zero out the upper words. */ a_bitlen = a[0]; alen = (a_bitlen + 31) >> 5; if (a_bitlen < m_bitlen) { memcpy(x + 1, a + 1, alen * sizeof *a); for (u = alen; u < mlen; u ++) { x[u + 1] = 0; } return; } /* * The source length is at least equal to that of the modulus. * We must thus copy N-1 words, and input the remaining words * one by one. */ memcpy(x + 1, a + 2 + (alen - mlen), (mlen - 1) * sizeof *a); x[mlen] = 0; for (u = 1 + alen - mlen; u > 0; u --) { br_i32_muladd_small(x, a[u], m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_i32_sub(uint32_t *a, const uint32_t *b, uint32_t ctl) { uint32_t cc; size_t u, m; cc = 0; m = (a[0] + 63) >> 5; for (u = 1; u < m; u ++) { uint32_t aw, bw, naw; aw = a[u]; bw = b[u]; naw = aw - bw - cc; /* * Carry is 1 if naw > aw. Carry is 1 also if naw == aw * AND the carry was already 1. */ cc = (cc & EQ(naw, aw)) | GT(naw, aw); a[u] = MUX(ctl, naw, aw); } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_i32_to_monty(uint32_t *x, const uint32_t *m) { uint32_t k; for (k = (m[0] + 31) >> 5; k > 0; k --) { br_i32_muladd_small(x, 0, m); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_INT128 /* * Compute x*y+v1+v2. Operands are 64-bit, and result is 128-bit, with * high word in "hi" and low word in "lo". */ #define FMA1(hi, lo, x, y, v1, v2) do { \ unsigned __int128 fmaz; \ fmaz = (unsigned __int128)(x) * (unsigned __int128)(y) \ + (unsigned __int128)(v1) + (unsigned __int128)(v2); \ (hi) = (uint64_t)(fmaz >> 64); \ (lo) = (uint64_t)fmaz; \ } while (0) /* * Compute x1*y1+x2*y2+v1+v2. Operands are 64-bit, and result is 128-bit, * with high word in "hi" and low word in "lo". * * Callers should ensure that the two inner products, and the v1 and v2 * operands, are multiple of 4 (this is not used by this specific definition * but may help other implementations). */ #define FMA2(hi, lo, x1, y1, x2, y2, v1, v2) do { \ unsigned __int128 fmaz; \ fmaz = (unsigned __int128)(x1) * (unsigned __int128)(y1) \ + (unsigned __int128)(x2) * (unsigned __int128)(y2) \ + (unsigned __int128)(v1) + (unsigned __int128)(v2); \ (hi) = (uint64_t)(fmaz >> 64); \ (lo) = (uint64_t)fmaz; \ } while (0) #elif BR_UMUL128 #include #define FMA1(hi, lo, x, y, v1, v2) do { \ uint64_t fmahi, fmalo; \ unsigned char fmacc; \ fmalo = _umul128((x), (y), &fmahi); \ fmacc = _addcarry_u64(0, fmalo, (v1), &fmalo); \ _addcarry_u64(fmacc, fmahi, 0, &fmahi); \ fmacc = _addcarry_u64(0, fmalo, (v2), &(lo)); \ _addcarry_u64(fmacc, fmahi, 0, &(hi)); \ } while (0) /* * Normally we should use _addcarry_u64() for FMA2 too, but it makes * Visual Studio crash. Instead we use this version, which leverages * the fact that the vx operands, and the products, are multiple of 4. * This is unfortunately slower. */ #define FMA2(hi, lo, x1, y1, x2, y2, v1, v2) do { \ uint64_t fma1hi, fma1lo; \ uint64_t fma2hi, fma2lo; \ uint64_t fmatt; \ fma1lo = _umul128((x1), (y1), &fma1hi); \ fma2lo = _umul128((x2), (y2), &fma2hi); \ fmatt = (fma1lo >> 2) + (fma2lo >> 2) \ + ((v1) >> 2) + ((v2) >> 2); \ (lo) = fmatt << 2; \ (hi) = fma1hi + fma2hi + (fmatt >> 62); \ } while (0) /* * The FMA2 macro definition we would prefer to use, but it triggers * an internal compiler error in Visual Studio 2015. * #define FMA2(hi, lo, x1, y1, x2, y2, v1, v2) do { \ uint64_t fma1hi, fma1lo; \ uint64_t fma2hi, fma2lo; \ unsigned char fmacc; \ fma1lo = _umul128((x1), (y1), &fma1hi); \ fma2lo = _umul128((x2), (y2), &fma2hi); \ fmacc = _addcarry_u64(0, fma1lo, (v1), &fma1lo); \ _addcarry_u64(fmacc, fma1hi, 0, &fma1hi); \ fmacc = _addcarry_u64(0, fma2lo, (v2), &fma2lo); \ _addcarry_u64(fmacc, fma2hi, 0, &fma2hi); \ fmacc = _addcarry_u64(0, fma1lo, fma2lo, &(lo)); \ _addcarry_u64(fmacc, fma1hi, fma2hi, &(hi)); \ } while (0) */ #endif #define MASK62 ((uint64_t)0x3FFFFFFFFFFFFFFF) #define MUL62_lo(x, y) (((uint64_t)(x) * (uint64_t)(y)) & MASK62) /* * Subtract b from a, and return the final carry. If 'ctl32' is 0, then * a[] is kept unmodified, but the final carry is still computed and * returned. */ static uint32_t i62_sub(uint64_t *a, const uint64_t *b, size_t num, uint32_t ctl32) { uint64_t cc, mask; size_t u; cc = 0; ctl32 = -ctl32; mask = (uint64_t)ctl32 | ((uint64_t)ctl32 << 32); for (u = 0; u < num; u ++) { uint64_t aw, bw, dw; aw = a[u]; bw = b[u]; dw = aw - bw - cc; cc = dw >> 63; dw &= MASK62; a[u] = aw ^ (mask & (dw ^ aw)); } return (uint32_t)cc; } /* * Montgomery multiplication, over arrays of 62-bit values. The * destination array (d) must be distinct from the other operands * (x, y and m). All arrays are in little-endian format (least * significant word comes first) over 'num' words. */ static void montymul(uint64_t *d, const uint64_t *x, const uint64_t *y, const uint64_t *m, size_t num, uint64_t m0i) { uint64_t dh; size_t u, num4; num4 = 1 + ((num - 1) & ~(size_t)3); memset(d, 0, num * sizeof *d); dh = 0; for (u = 0; u < num; u ++) { size_t v; uint64_t f, xu; uint64_t r, zh; uint64_t hi, lo; xu = x[u] << 2; f = MUL62_lo(d[0] + MUL62_lo(x[u], y[0]), m0i) << 2; FMA2(hi, lo, xu, y[0], f, m[0], d[0] << 2, 0); r = hi; for (v = 1; v < num4; v += 4) { FMA2(hi, lo, xu, y[v + 0], f, m[v + 0], d[v + 0] << 2, r << 2); r = hi + (r >> 62); d[v - 1] = lo >> 2; FMA2(hi, lo, xu, y[v + 1], f, m[v + 1], d[v + 1] << 2, r << 2); r = hi + (r >> 62); d[v + 0] = lo >> 2; FMA2(hi, lo, xu, y[v + 2], f, m[v + 2], d[v + 2] << 2, r << 2); r = hi + (r >> 62); d[v + 1] = lo >> 2; FMA2(hi, lo, xu, y[v + 3], f, m[v + 3], d[v + 3] << 2, r << 2); r = hi + (r >> 62); d[v + 2] = lo >> 2; } for (; v < num; v ++) { FMA2(hi, lo, xu, y[v], f, m[v], d[v] << 2, r << 2); r = hi + (r >> 62); d[v - 1] = lo >> 2; } zh = dh + r; d[num - 1] = zh & MASK62; dh = zh >> 62; } i62_sub(d, m, num, (uint32_t)dh | NOT(i62_sub(d, m, num, 0))); } /* * Conversion back from Montgomery representation. */ static void frommonty(uint64_t *x, const uint64_t *m, size_t num, uint64_t m0i) { size_t u, v; for (u = 0; u < num; u ++) { uint64_t f, cc; f = MUL62_lo(x[0], m0i) << 2; cc = 0; for (v = 0; v < num; v ++) { uint64_t hi, lo; FMA1(hi, lo, f, m[v], x[v] << 2, cc); cc = hi << 2; if (v != 0) { x[v - 1] = lo >> 2; } } x[num - 1] = cc >> 2; } i62_sub(x, m, num, NOT(i62_sub(x, m, num, 0))); } /* see inner.h */ uint32_t br_i62_modpow_opt(uint32_t *x31, const unsigned char *e, size_t elen, const uint32_t *m31, uint32_t m0i31, uint64_t *tmp, size_t twlen) { size_t u, mw31num, mw62num; uint64_t *x, *m, *t1, *t2; uint64_t m0i; uint32_t acc; int win_len, acc_len; /* * Get modulus size, in words. */ mw31num = (m31[0] + 31) >> 5; mw62num = (mw31num + 1) >> 1; /* * In order to apply this function, we must have enough room to * copy the operand and modulus into the temporary array, along * with at least two temporaries. If there is not enough room, * switch to br_i31_modpow(). We also use br_i31_modpow() if the * modulus length is not at least four words (94 bits or more). */ if (mw31num < 4 || (mw62num << 2) > twlen) { /* * We assume here that we can split an aligned uint64_t * into two properly aligned uint32_t. Since both types * are supposed to have an exact width with no padding, * then this property must hold. */ size_t txlen; txlen = mw31num + 1; if (twlen < txlen) { return 0; } br_i31_modpow(x31, e, elen, m31, m0i31, (uint32_t *)tmp, (uint32_t *)tmp + txlen); return 1; } /* * Convert x to Montgomery representation: this means that * we replace x with x*2^z mod m, where z is the smallest multiple * of the word size such that 2^z >= m. We want to reuse the 31-bit * functions here (for constant-time operation), but we need z * for a 62-bit word size. */ for (u = 0; u < mw62num; u ++) { br_i31_muladd_small(x31, 0, m31); br_i31_muladd_small(x31, 0, m31); } /* * Assemble operands into arrays of 62-bit words. Note that * all the arrays of 62-bit words that we will handle here * are without any leading size word. * * We also adjust tmp and twlen to account for the words used * for these extra arrays. */ m = tmp; x = tmp + mw62num; tmp += (mw62num << 1); twlen -= (mw62num << 1); for (u = 0; u < mw31num; u += 2) { size_t v; v = u >> 1; if ((u + 1) == mw31num) { m[v] = (uint64_t)m31[u + 1]; x[v] = (uint64_t)x31[u + 1]; } else { m[v] = (uint64_t)m31[u + 1] + ((uint64_t)m31[u + 2] << 31); x[v] = (uint64_t)x31[u + 1] + ((uint64_t)x31[u + 2] << 31); } } /* * Compute window size. We support windows up to 5 bits; for a * window of size k bits, we need 2^k+1 temporaries (for k = 1, * we use special code that uses only 2 temporaries). */ for (win_len = 5; win_len > 1; win_len --) { if ((((uint32_t)1 << win_len) + 1) * mw62num <= twlen) { break; } } t1 = tmp; t2 = tmp + mw62num; /* * Compute m0i, which is equal to -(1/m0) mod 2^62. We were * provided with m0i31, which already fulfills this property * modulo 2^31; the single expression below is then sufficient. */ m0i = (uint64_t)m0i31; m0i = MUL62_lo(m0i, (uint64_t)2 + MUL62_lo(m0i, m[0])); /* * Compute window contents. If the window has size one bit only, * then t2 is set to x; otherwise, t2[0] is left untouched, and * t2[k] is set to x^k (for k >= 1). */ if (win_len == 1) { memcpy(t2, x, mw62num * sizeof *x); } else { uint64_t *base; memcpy(t2 + mw62num, x, mw62num * sizeof *x); base = t2 + mw62num; for (u = 2; u < ((unsigned)1 << win_len); u ++) { montymul(base + mw62num, base, x, m, mw62num, m0i); base += mw62num; } } /* * Set x to 1, in Montgomery representation. We again use the * 31-bit code. */ br_i31_zero(x31, m31[0]); x31[(m31[0] + 31) >> 5] = 1; br_i31_muladd_small(x31, 0, m31); if (mw31num & 1) { br_i31_muladd_small(x31, 0, m31); } for (u = 0; u < mw31num; u += 2) { size_t v; v = u >> 1; if ((u + 1) == mw31num) { x[v] = (uint64_t)x31[u + 1]; } else { x[v] = (uint64_t)x31[u + 1] + ((uint64_t)x31[u + 2] << 31); } } /* * We process bits from most to least significant. At each * loop iteration, we have acc_len bits in acc. */ acc = 0; acc_len = 0; while (acc_len > 0 || elen > 0) { int i, k; uint32_t bits; uint64_t mask1, mask2; /* * Get the next bits. */ k = win_len; if (acc_len < win_len) { if (elen > 0) { acc = (acc << 8) | *e ++; elen --; acc_len += 8; } else { k = acc_len; } } bits = (acc >> (acc_len - k)) & (((uint32_t)1 << k) - 1); acc_len -= k; /* * We could get exactly k bits. Compute k squarings. */ for (i = 0; i < k; i ++) { montymul(t1, x, x, m, mw62num, m0i); memcpy(x, t1, mw62num * sizeof *x); } /* * Window lookup: we want to set t2 to the window * lookup value, assuming the bits are non-zero. If * the window length is 1 bit only, then t2 is * already set; otherwise, we do a constant-time lookup. */ if (win_len > 1) { uint64_t *base; memset(t2, 0, mw62num * sizeof *t2); base = t2 + mw62num; for (u = 1; u < ((uint32_t)1 << k); u ++) { uint64_t mask; size_t v; mask = -(uint64_t)EQ(u, bits); for (v = 0; v < mw62num; v ++) { t2[v] |= mask & base[v]; } base += mw62num; } } /* * Multiply with the looked-up value. We keep the product * only if the exponent bits are not all-zero. */ montymul(t1, x, t2, m, mw62num, m0i); mask1 = -(uint64_t)EQ(bits, 0); mask2 = ~mask1; for (u = 0; u < mw62num; u ++) { x[u] = (mask1 & x[u]) | (mask2 & t1[u]); } } /* * Convert back from Montgomery representation. */ frommonty(x, m, mw62num, m0i); /* * Convert result into 31-bit words. */ for (u = 0; u < mw31num; u += 2) { uint64_t zw; zw = x[u >> 1]; x31[u + 1] = (uint32_t)zw & 0x7FFFFFFF; if ((u + 1) < mw31num) { x31[u + 2] = (uint32_t)(zw >> 31); } } return 1; } #else /* see inner.h */ uint32_t br_i62_modpow_opt(uint32_t *x31, const unsigned char *e, size_t elen, const uint32_t *m31, uint32_t m0i31, uint64_t *tmp, size_t twlen) { size_t mwlen; mwlen = (m31[0] + 63) >> 5; if (twlen < mwlen) { return 0; } return br_i31_modpow_opt(x31, e, elen, m31, m0i31, (uint32_t *)tmp, twlen << 1); } #endif /* see inner.h */ uint32_t br_i62_modpow_opt_as_i31(uint32_t *x31, const unsigned char *e, size_t elen, const uint32_t *m31, uint32_t m0i31, uint32_t *tmp, size_t twlen) { /* * As documented, this function expects the 'tmp' argument to be * 64-bit aligned. This is OK since this function is internal (it * is not part of BearSSL's public API). */ return br_i62_modpow_opt(x31, e, elen, m31, m0i31, (uint64_t *)tmp, twlen >> 1); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ const unsigned char br_hkdf_no_salt = 0; /* see bearssl_kdf.h */ void br_hkdf_init(br_hkdf_context *hc, const br_hash_class *digest_vtable, const void *salt, size_t salt_len) { br_hmac_key_context kc; unsigned char tmp[64]; if (salt == BR_HKDF_NO_SALT) { salt = tmp; salt_len = br_digest_size(digest_vtable); memset(tmp, 0, salt_len); } br_hmac_key_init(&kc, digest_vtable, salt, salt_len); br_hmac_init(&hc->u.hmac_ctx, &kc, 0); hc->dig_len = br_hmac_size(&hc->u.hmac_ctx); } /* see bearssl_kdf.h */ void br_hkdf_inject(br_hkdf_context *hc, const void *ikm, size_t ikm_len) { br_hmac_update(&hc->u.hmac_ctx, ikm, ikm_len); } /* see bearssl_kdf.h */ void br_hkdf_flip(br_hkdf_context *hc) { unsigned char tmp[64]; br_hmac_out(&hc->u.hmac_ctx, tmp); br_hmac_key_init(&hc->u.prk_ctx, br_hmac_get_digest(&hc->u.hmac_ctx), tmp, hc->dig_len); hc->ptr = hc->dig_len; hc->chunk_num = 0; } /* see bearssl_kdf.h */ size_t br_hkdf_produce(br_hkdf_context *hc, const void *info, size_t info_len, void *out, size_t out_len) { size_t tlen; tlen = 0; while (out_len > 0) { size_t clen; if (hc->ptr == hc->dig_len) { br_hmac_context hmac_ctx; unsigned char x; hc->chunk_num ++; if (hc->chunk_num == 256) { return tlen; } x = hc->chunk_num; br_hmac_init(&hmac_ctx, &hc->u.prk_ctx, 0); if (x != 1) { br_hmac_update(&hmac_ctx, hc->buf, hc->dig_len); } br_hmac_update(&hmac_ctx, info, info_len); br_hmac_update(&hmac_ctx, &x, 1); br_hmac_out(&hmac_ctx, hc->buf); hc->ptr = 0; } clen = hc->dig_len - hc->ptr; if (clen > out_len) { clen = out_len; } memcpy(out, hc->buf + hc->ptr, clen); out = (unsigned char *)out + clen; out_len -= clen; hc->ptr += clen; tlen += clen; } return tlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Round constants. */ static const uint64_t RC[] = { 0x0000000000000001, 0x0000000000008082, 0x800000000000808A, 0x8000000080008000, 0x000000000000808B, 0x0000000080000001, 0x8000000080008081, 0x8000000000008009, 0x000000000000008A, 0x0000000000000088, 0x0000000080008009, 0x000000008000000A, 0x000000008000808B, 0x800000000000008B, 0x8000000000008089, 0x8000000000008003, 0x8000000000008002, 0x8000000000000080, 0x000000000000800A, 0x800000008000000A, 0x8000000080008081, 0x8000000000008080, 0x0000000080000001, 0x8000000080008008 }; /* * XOR a block of data into the provided state. This supports only * blocks whose length is a multiple of 64 bits. */ static void xor_block(uint64_t *A, const void *data, size_t rate) { size_t u; for (u = 0; u < rate; u += 8) { A[u >> 3] ^= br_dec64le((const unsigned char *)data + u); } } /* * Process a block with the provided data. The data length must be a * multiple of 8 (in bytes); normally, this is the "rate". */ static void process_block(uint64_t *A) { uint64_t t0, t1, t2, t3, t4; uint64_t tt0, tt1, tt2, tt3; uint64_t t, kt; uint64_t c0, c1, c2, c3, c4, bnn; int j; /* * Compute the 24 rounds. This loop is partially unrolled (each * iteration computes two rounds). */ for (j = 0; j < 24; j += 2) { tt0 = A[ 1] ^ A[ 6]; tt1 = A[11] ^ A[16]; tt0 ^= A[21] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 4] ^ A[ 9]; tt3 = A[14] ^ A[19]; tt0 ^= A[24]; tt2 ^= tt3; t0 = tt0 ^ tt2; tt0 = A[ 2] ^ A[ 7]; tt1 = A[12] ^ A[17]; tt0 ^= A[22] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 0] ^ A[ 5]; tt3 = A[10] ^ A[15]; tt0 ^= A[20]; tt2 ^= tt3; t1 = tt0 ^ tt2; tt0 = A[ 3] ^ A[ 8]; tt1 = A[13] ^ A[18]; tt0 ^= A[23] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 1] ^ A[ 6]; tt3 = A[11] ^ A[16]; tt0 ^= A[21]; tt2 ^= tt3; t2 = tt0 ^ tt2; tt0 = A[ 4] ^ A[ 9]; tt1 = A[14] ^ A[19]; tt0 ^= A[24] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 2] ^ A[ 7]; tt3 = A[12] ^ A[17]; tt0 ^= A[22]; tt2 ^= tt3; t3 = tt0 ^ tt2; tt0 = A[ 0] ^ A[ 5]; tt1 = A[10] ^ A[15]; tt0 ^= A[20] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 3] ^ A[ 8]; tt3 = A[13] ^ A[18]; tt0 ^= A[23]; tt2 ^= tt3; t4 = tt0 ^ tt2; A[ 0] = A[ 0] ^ t0; A[ 5] = A[ 5] ^ t0; A[10] = A[10] ^ t0; A[15] = A[15] ^ t0; A[20] = A[20] ^ t0; A[ 1] = A[ 1] ^ t1; A[ 6] = A[ 6] ^ t1; A[11] = A[11] ^ t1; A[16] = A[16] ^ t1; A[21] = A[21] ^ t1; A[ 2] = A[ 2] ^ t2; A[ 7] = A[ 7] ^ t2; A[12] = A[12] ^ t2; A[17] = A[17] ^ t2; A[22] = A[22] ^ t2; A[ 3] = A[ 3] ^ t3; A[ 8] = A[ 8] ^ t3; A[13] = A[13] ^ t3; A[18] = A[18] ^ t3; A[23] = A[23] ^ t3; A[ 4] = A[ 4] ^ t4; A[ 9] = A[ 9] ^ t4; A[14] = A[14] ^ t4; A[19] = A[19] ^ t4; A[24] = A[24] ^ t4; A[ 5] = (A[ 5] << 36) | (A[ 5] >> (64 - 36)); A[10] = (A[10] << 3) | (A[10] >> (64 - 3)); A[15] = (A[15] << 41) | (A[15] >> (64 - 41)); A[20] = (A[20] << 18) | (A[20] >> (64 - 18)); A[ 1] = (A[ 1] << 1) | (A[ 1] >> (64 - 1)); A[ 6] = (A[ 6] << 44) | (A[ 6] >> (64 - 44)); A[11] = (A[11] << 10) | (A[11] >> (64 - 10)); A[16] = (A[16] << 45) | (A[16] >> (64 - 45)); A[21] = (A[21] << 2) | (A[21] >> (64 - 2)); A[ 2] = (A[ 2] << 62) | (A[ 2] >> (64 - 62)); A[ 7] = (A[ 7] << 6) | (A[ 7] >> (64 - 6)); A[12] = (A[12] << 43) | (A[12] >> (64 - 43)); A[17] = (A[17] << 15) | (A[17] >> (64 - 15)); A[22] = (A[22] << 61) | (A[22] >> (64 - 61)); A[ 3] = (A[ 3] << 28) | (A[ 3] >> (64 - 28)); A[ 8] = (A[ 8] << 55) | (A[ 8] >> (64 - 55)); A[13] = (A[13] << 25) | (A[13] >> (64 - 25)); A[18] = (A[18] << 21) | (A[18] >> (64 - 21)); A[23] = (A[23] << 56) | (A[23] >> (64 - 56)); A[ 4] = (A[ 4] << 27) | (A[ 4] >> (64 - 27)); A[ 9] = (A[ 9] << 20) | (A[ 9] >> (64 - 20)); A[14] = (A[14] << 39) | (A[14] >> (64 - 39)); A[19] = (A[19] << 8) | (A[19] >> (64 - 8)); A[24] = (A[24] << 14) | (A[24] >> (64 - 14)); bnn = ~A[12]; kt = A[ 6] | A[12]; c0 = A[ 0] ^ kt; kt = bnn | A[18]; c1 = A[ 6] ^ kt; kt = A[18] & A[24]; c2 = A[12] ^ kt; kt = A[24] | A[ 0]; c3 = A[18] ^ kt; kt = A[ 0] & A[ 6]; c4 = A[24] ^ kt; A[ 0] = c0; A[ 6] = c1; A[12] = c2; A[18] = c3; A[24] = c4; bnn = ~A[22]; kt = A[ 9] | A[10]; c0 = A[ 3] ^ kt; kt = A[10] & A[16]; c1 = A[ 9] ^ kt; kt = A[16] | bnn; c2 = A[10] ^ kt; kt = A[22] | A[ 3]; c3 = A[16] ^ kt; kt = A[ 3] & A[ 9]; c4 = A[22] ^ kt; A[ 3] = c0; A[ 9] = c1; A[10] = c2; A[16] = c3; A[22] = c4; bnn = ~A[19]; kt = A[ 7] | A[13]; c0 = A[ 1] ^ kt; kt = A[13] & A[19]; c1 = A[ 7] ^ kt; kt = bnn & A[20]; c2 = A[13] ^ kt; kt = A[20] | A[ 1]; c3 = bnn ^ kt; kt = A[ 1] & A[ 7]; c4 = A[20] ^ kt; A[ 1] = c0; A[ 7] = c1; A[13] = c2; A[19] = c3; A[20] = c4; bnn = ~A[17]; kt = A[ 5] & A[11]; c0 = A[ 4] ^ kt; kt = A[11] | A[17]; c1 = A[ 5] ^ kt; kt = bnn | A[23]; c2 = A[11] ^ kt; kt = A[23] & A[ 4]; c3 = bnn ^ kt; kt = A[ 4] | A[ 5]; c4 = A[23] ^ kt; A[ 4] = c0; A[ 5] = c1; A[11] = c2; A[17] = c3; A[23] = c4; bnn = ~A[ 8]; kt = bnn & A[14]; c0 = A[ 2] ^ kt; kt = A[14] | A[15]; c1 = bnn ^ kt; kt = A[15] & A[21]; c2 = A[14] ^ kt; kt = A[21] | A[ 2]; c3 = A[15] ^ kt; kt = A[ 2] & A[ 8]; c4 = A[21] ^ kt; A[ 2] = c0; A[ 8] = c1; A[14] = c2; A[15] = c3; A[21] = c4; A[ 0] = A[ 0] ^ RC[j + 0]; tt0 = A[ 6] ^ A[ 9]; tt1 = A[ 7] ^ A[ 5]; tt0 ^= A[ 8] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[24] ^ A[22]; tt3 = A[20] ^ A[23]; tt0 ^= A[21]; tt2 ^= tt3; t0 = tt0 ^ tt2; tt0 = A[12] ^ A[10]; tt1 = A[13] ^ A[11]; tt0 ^= A[14] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 0] ^ A[ 3]; tt3 = A[ 1] ^ A[ 4]; tt0 ^= A[ 2]; tt2 ^= tt3; t1 = tt0 ^ tt2; tt0 = A[18] ^ A[16]; tt1 = A[19] ^ A[17]; tt0 ^= A[15] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[ 6] ^ A[ 9]; tt3 = A[ 7] ^ A[ 5]; tt0 ^= A[ 8]; tt2 ^= tt3; t2 = tt0 ^ tt2; tt0 = A[24] ^ A[22]; tt1 = A[20] ^ A[23]; tt0 ^= A[21] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[12] ^ A[10]; tt3 = A[13] ^ A[11]; tt0 ^= A[14]; tt2 ^= tt3; t3 = tt0 ^ tt2; tt0 = A[ 0] ^ A[ 3]; tt1 = A[ 1] ^ A[ 4]; tt0 ^= A[ 2] ^ tt1; tt0 = (tt0 << 1) | (tt0 >> 63); tt2 = A[18] ^ A[16]; tt3 = A[19] ^ A[17]; tt0 ^= A[15]; tt2 ^= tt3; t4 = tt0 ^ tt2; A[ 0] = A[ 0] ^ t0; A[ 3] = A[ 3] ^ t0; A[ 1] = A[ 1] ^ t0; A[ 4] = A[ 4] ^ t0; A[ 2] = A[ 2] ^ t0; A[ 6] = A[ 6] ^ t1; A[ 9] = A[ 9] ^ t1; A[ 7] = A[ 7] ^ t1; A[ 5] = A[ 5] ^ t1; A[ 8] = A[ 8] ^ t1; A[12] = A[12] ^ t2; A[10] = A[10] ^ t2; A[13] = A[13] ^ t2; A[11] = A[11] ^ t2; A[14] = A[14] ^ t2; A[18] = A[18] ^ t3; A[16] = A[16] ^ t3; A[19] = A[19] ^ t3; A[17] = A[17] ^ t3; A[15] = A[15] ^ t3; A[24] = A[24] ^ t4; A[22] = A[22] ^ t4; A[20] = A[20] ^ t4; A[23] = A[23] ^ t4; A[21] = A[21] ^ t4; A[ 3] = (A[ 3] << 36) | (A[ 3] >> (64 - 36)); A[ 1] = (A[ 1] << 3) | (A[ 1] >> (64 - 3)); A[ 4] = (A[ 4] << 41) | (A[ 4] >> (64 - 41)); A[ 2] = (A[ 2] << 18) | (A[ 2] >> (64 - 18)); A[ 6] = (A[ 6] << 1) | (A[ 6] >> (64 - 1)); A[ 9] = (A[ 9] << 44) | (A[ 9] >> (64 - 44)); A[ 7] = (A[ 7] << 10) | (A[ 7] >> (64 - 10)); A[ 5] = (A[ 5] << 45) | (A[ 5] >> (64 - 45)); A[ 8] = (A[ 8] << 2) | (A[ 8] >> (64 - 2)); A[12] = (A[12] << 62) | (A[12] >> (64 - 62)); A[10] = (A[10] << 6) | (A[10] >> (64 - 6)); A[13] = (A[13] << 43) | (A[13] >> (64 - 43)); A[11] = (A[11] << 15) | (A[11] >> (64 - 15)); A[14] = (A[14] << 61) | (A[14] >> (64 - 61)); A[18] = (A[18] << 28) | (A[18] >> (64 - 28)); A[16] = (A[16] << 55) | (A[16] >> (64 - 55)); A[19] = (A[19] << 25) | (A[19] >> (64 - 25)); A[17] = (A[17] << 21) | (A[17] >> (64 - 21)); A[15] = (A[15] << 56) | (A[15] >> (64 - 56)); A[24] = (A[24] << 27) | (A[24] >> (64 - 27)); A[22] = (A[22] << 20) | (A[22] >> (64 - 20)); A[20] = (A[20] << 39) | (A[20] >> (64 - 39)); A[23] = (A[23] << 8) | (A[23] >> (64 - 8)); A[21] = (A[21] << 14) | (A[21] >> (64 - 14)); bnn = ~A[13]; kt = A[ 9] | A[13]; c0 = A[ 0] ^ kt; kt = bnn | A[17]; c1 = A[ 9] ^ kt; kt = A[17] & A[21]; c2 = A[13] ^ kt; kt = A[21] | A[ 0]; c3 = A[17] ^ kt; kt = A[ 0] & A[ 9]; c4 = A[21] ^ kt; A[ 0] = c0; A[ 9] = c1; A[13] = c2; A[17] = c3; A[21] = c4; bnn = ~A[14]; kt = A[22] | A[ 1]; c0 = A[18] ^ kt; kt = A[ 1] & A[ 5]; c1 = A[22] ^ kt; kt = A[ 5] | bnn; c2 = A[ 1] ^ kt; kt = A[14] | A[18]; c3 = A[ 5] ^ kt; kt = A[18] & A[22]; c4 = A[14] ^ kt; A[18] = c0; A[22] = c1; A[ 1] = c2; A[ 5] = c3; A[14] = c4; bnn = ~A[23]; kt = A[10] | A[19]; c0 = A[ 6] ^ kt; kt = A[19] & A[23]; c1 = A[10] ^ kt; kt = bnn & A[ 2]; c2 = A[19] ^ kt; kt = A[ 2] | A[ 6]; c3 = bnn ^ kt; kt = A[ 6] & A[10]; c4 = A[ 2] ^ kt; A[ 6] = c0; A[10] = c1; A[19] = c2; A[23] = c3; A[ 2] = c4; bnn = ~A[11]; kt = A[ 3] & A[ 7]; c0 = A[24] ^ kt; kt = A[ 7] | A[11]; c1 = A[ 3] ^ kt; kt = bnn | A[15]; c2 = A[ 7] ^ kt; kt = A[15] & A[24]; c3 = bnn ^ kt; kt = A[24] | A[ 3]; c4 = A[15] ^ kt; A[24] = c0; A[ 3] = c1; A[ 7] = c2; A[11] = c3; A[15] = c4; bnn = ~A[16]; kt = bnn & A[20]; c0 = A[12] ^ kt; kt = A[20] | A[ 4]; c1 = bnn ^ kt; kt = A[ 4] & A[ 8]; c2 = A[20] ^ kt; kt = A[ 8] | A[12]; c3 = A[ 4] ^ kt; kt = A[12] & A[16]; c4 = A[ 8] ^ kt; A[12] = c0; A[16] = c1; A[20] = c2; A[ 4] = c3; A[ 8] = c4; A[ 0] = A[ 0] ^ RC[j + 1]; t = A[ 5]; A[ 5] = A[18]; A[18] = A[11]; A[11] = A[10]; A[10] = A[ 6]; A[ 6] = A[22]; A[22] = A[20]; A[20] = A[12]; A[12] = A[19]; A[19] = A[15]; A[15] = A[24]; A[24] = A[ 8]; A[ 8] = t; t = A[ 1]; A[ 1] = A[ 9]; A[ 9] = A[14]; A[14] = A[ 2]; A[ 2] = A[13]; A[13] = A[23]; A[23] = A[ 4]; A[ 4] = A[21]; A[21] = A[16]; A[16] = A[ 3]; A[ 3] = A[17]; A[17] = A[ 7]; A[ 7] = t; } } /* see bearssl_kdf.h */ void br_shake_init(br_shake_context *sc, int security_level) { sc->rate = 200 - (size_t)(security_level >> 2); sc->dptr = 0; memset(sc->A, 0, sizeof sc->A); sc->A[ 1] = ~(uint64_t)0; sc->A[ 2] = ~(uint64_t)0; sc->A[ 8] = ~(uint64_t)0; sc->A[12] = ~(uint64_t)0; sc->A[17] = ~(uint64_t)0; sc->A[20] = ~(uint64_t)0; } /* see bearssl_kdf.h */ void br_shake_inject(br_shake_context *sc, const void *data, size_t len) { const unsigned char *buf; size_t rate, dptr; buf = (unsigned char*)data; rate = sc->rate; dptr = sc->dptr; while (len > 0) { size_t clen; clen = rate - dptr; if (clen > len) { clen = len; } memcpy(sc->dbuf + dptr, buf, clen); dptr += clen; buf += clen; len -= clen; if (dptr == rate) { xor_block(sc->A, sc->dbuf, rate); process_block(sc->A); dptr = 0; } } sc->dptr = dptr; } /* see bearssl_kdf.h */ void br_shake_flip(br_shake_context *sc) { /* * We apply padding and pre-XOR the value into the state. We * set dptr to the end of the buffer, so that first call to * shake_extract() will process the block. */ if ((sc->dptr + 1) == sc->rate) { sc->dbuf[sc->dptr ++] = 0x9F; } else { sc->dbuf[sc->dptr ++] = 0x1F; memset(sc->dbuf + sc->dptr, 0x00, sc->rate - sc->dptr - 1); sc->dbuf[sc->rate - 1] = 0x80; sc->dptr = sc->rate; } xor_block(sc->A, sc->dbuf, sc->rate); } /* see bearssl_kdf.h */ void br_shake_produce(br_shake_context *sc, void *out, size_t len) { unsigned char *buf; size_t dptr, rate; buf = (unsigned char*)out; dptr = sc->dptr; rate = sc->rate; while (len > 0) { size_t clen; if (dptr == rate) { unsigned char *dbuf; uint64_t *A; A = sc->A; dbuf = sc->dbuf; process_block(A); br_enc64le(dbuf + 0, A[ 0]); br_enc64le(dbuf + 8, ~A[ 1]); br_enc64le(dbuf + 16, ~A[ 2]); br_enc64le(dbuf + 24, A[ 3]); br_enc64le(dbuf + 32, A[ 4]); br_enc64le(dbuf + 40, A[ 5]); br_enc64le(dbuf + 48, A[ 6]); br_enc64le(dbuf + 56, A[ 7]); br_enc64le(dbuf + 64, ~A[ 8]); br_enc64le(dbuf + 72, A[ 9]); br_enc64le(dbuf + 80, A[10]); br_enc64le(dbuf + 88, A[11]); br_enc64le(dbuf + 96, ~A[12]); br_enc64le(dbuf + 104, A[13]); br_enc64le(dbuf + 112, A[14]); br_enc64le(dbuf + 120, A[15]); br_enc64le(dbuf + 128, A[16]); br_enc64le(dbuf + 136, ~A[17]); br_enc64le(dbuf + 144, A[18]); br_enc64le(dbuf + 152, A[19]); br_enc64le(dbuf + 160, ~A[20]); br_enc64le(dbuf + 168, A[21]); br_enc64le(dbuf + 176, A[22]); br_enc64le(dbuf + 184, A[23]); br_enc64le(dbuf + 192, A[24]); dptr = 0; } clen = rate - dptr; if (clen > len) { clen = len; } memcpy(buf, sc->dbuf + dptr, clen); dptr += clen; buf += clen; len -= clen; } sc->dptr = dptr; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static inline size_t _src_mac_hmac_cblock_size(const br_hash_class *dig) { unsigned ls; ls = (unsigned)(dig->desc >> BR_HASHDESC_LBLEN_OFF) & BR_HASHDESC_LBLEN_MASK; return (size_t)1 << ls; } static void process_key(const br_hash_class **hc, void *ks, const void *key, size_t key_len, unsigned bb) { unsigned char tmp[256]; size_t blen, u; blen = _src_mac_hmac_cblock_size(*hc); memcpy(tmp, key, key_len); for (u = 0; u < key_len; u ++) { tmp[u] ^= (unsigned char)bb; } memset(tmp + key_len, bb, blen - key_len); (*hc)->init(hc); (*hc)->update(hc, tmp, blen); (*hc)->state(hc, ks); } /* see bearssl.h */ void br_hmac_key_init(br_hmac_key_context *kc, const br_hash_class *dig, const void *key, size_t key_len) { br_hash_compat_context hc; unsigned char kbuf[64]; kc->dig_vtable = dig; hc.vtable = dig; if (key_len > _src_mac_hmac_cblock_size(dig)) { dig->init(&hc.vtable); dig->update(&hc.vtable, key, key_len); dig->out(&hc.vtable, kbuf); key = kbuf; key_len = br_digest_size(dig); } process_key(&hc.vtable, kc->ksi, key, key_len, 0x36); process_key(&hc.vtable, kc->kso, key, key_len, 0x5C); } /* see bearssl.h */ void br_hmac_init(br_hmac_context *ctx, const br_hmac_key_context *kc, size_t out_len) { const br_hash_class *dig; size_t blen, hlen; dig = kc->dig_vtable; blen = _src_mac_hmac_cblock_size(dig); dig->init(&ctx->dig.vtable); dig->set_state(&ctx->dig.vtable, kc->ksi, (uint64_t)blen); memcpy(ctx->kso, kc->kso, sizeof kc->kso); hlen = br_digest_size(dig); if (out_len > 0 && out_len < hlen) { hlen = out_len; } ctx->out_len = hlen; } /* see bearssl.h */ void br_hmac_update(br_hmac_context *ctx, const void *data, size_t len) { ctx->dig.vtable->update(&ctx->dig.vtable, data, len); } /* see bearssl.h */ size_t br_hmac_out(const br_hmac_context *ctx, void *out) { const br_hash_class *dig; br_hash_compat_context hc; unsigned char tmp[64]; size_t blen, hlen; dig = ctx->dig.vtable; dig->out(&ctx->dig.vtable, tmp); blen = _src_mac_hmac_cblock_size(dig); dig->init(&hc.vtable); dig->set_state(&hc.vtable, ctx->kso, (uint64_t)blen); hlen = br_digest_size(dig); dig->update(&hc.vtable, tmp, hlen); dig->out(&hc.vtable, tmp); memcpy(out, tmp, ctx->out_len); return ctx->out_len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static inline size_t hash_size(const br_hash_class *dig) { return (unsigned)(dig->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; } static inline size_t _src_mac_hmac_ct_cblock_size(const br_hash_class *dig) { unsigned ls; ls = (unsigned)(dig->desc >> BR_HASHDESC_LBLEN_OFF) & BR_HASHDESC_LBLEN_MASK; return (size_t)1 << ls; } /* see bearssl.h */ size_t br_hmac_outCT(const br_hmac_context *ctx, const void *data, size_t len, size_t min_len, size_t max_len, void *out) { /* * Method implemented here is inspired from the descriptions on: * https://www.imperialviolet.org/2013/02/04/luckythirteen.html * * Principle: we input bytes one by one. We use a MUX to push * padding bytes instead of data bytes when appropriate. At each * block limit, we get the current hash function state: this is * a potential output, since we handle MD padding ourselves. * * be 1 for big-endian, 0 for little-endian * po minimal MD padding length * bs block size (always a power of 2) * hlen hash output size */ const br_hash_class *dig; br_hash_compat_context hc; int be; uint32_t po, bs; uint32_t kr, km, kl, kz, u; uint64_t count, ncount, bit_len; unsigned char tmp1[64], tmp2[64]; size_t hlen; /* * Copy the current hash context. */ hc = ctx->dig; /* * Get function-specific information. */ dig = hc.vtable; be = (dig->desc & BR_HASHDESC_MD_PADDING_BE) != 0; po = 9; if (dig->desc & BR_HASHDESC_MD_PADDING_128) { po += 8; } bs = _src_mac_hmac_ct_cblock_size(dig); hlen = hash_size(dig); /* * Get current input length and compute total bit length. */ count = dig->state(&hc.vtable, tmp1); bit_len = (count + (uint64_t)len) << 3; /* * We can input the blocks that we are sure we will use. * This offers better performance (no MUX for these blocks) * and also ensures that the remaining lengths fit on 32 bits. */ ncount = (count + (uint64_t)min_len) & ~(uint64_t)(bs - 1); if (ncount > count) { size_t zlen; zlen = (size_t)(ncount - count); dig->update(&hc.vtable, data, zlen); data = (const unsigned char *)data + zlen; len -= zlen; max_len -= zlen; count = ncount; } /* * At that point: * -- 'count' contains the number of bytes already processed * (in total). * -- We must input 'len' bytes. 'min_len' is unimportant: we * used it to know how many full blocks we could process * directly. Now only len and max_len matter. * * We compute kr, kl, kz and km. * kr number of input bytes already in the current block * km index of the first byte after the end of the last padding * block, if length is max_len * kz index of the last byte of the actual last padding block * kl index of the start of the encoded length * * km, kz and kl are counted from the current offset in the * input data. */ kr = (uint32_t)count & (bs - 1); kz = ((kr + (uint32_t)len + po + bs - 1) & ~(bs - 1)) - 1 - kr; kl = kz - 7; km = ((kr + (uint32_t)max_len + po + bs - 1) & ~(bs - 1)) - kr; /* * We must now process km bytes. For index u from 0 to km-1: * d is from data[] if u < max_len, 0x00 otherwise * e is an encoded length byte or 0x00, depending on u * The tests for d and e need not be constant-time, since * they relate only to u and max_len, not to the actual length. * * Actual input length is then: * d if u < len * 0x80 if u == len * 0x00 if u > len and u < kl * e if u >= kl * * Hash state is obtained whenever we reach a full block. This * is the result we want if and only if u == kz. */ memset(tmp2, 0, sizeof tmp2); for (u = 0; u < km; u ++) { uint32_t v; uint32_t d, e, x0, x1; unsigned char x[1]; d = (u < max_len) ? ((const unsigned char *)data)[u] : 0x00; v = (kr + u) & (bs - 1); if (v >= (bs - 8)) { unsigned j; j = (v - (bs - 8)) << 3; if (be) { e = (uint32_t)(bit_len >> (56 - j)); } else { e = (uint32_t)(bit_len >> j); } e &= 0xFF; } else { e = 0x00; } x0 = MUX(EQ(u, (uint32_t)len), 0x80, d); x1 = MUX(LT(u, kl), 0x00, e); x[0] = MUX(LE(u, (uint32_t)len), x0, x1); dig->update(&hc.vtable, x, 1); if (v == (bs - 1)) { dig->state(&hc.vtable, tmp1); CCOPY(EQ(u, kz), tmp2, tmp1, hlen); } } /* * Inner hash output is in tmp2[]; we finish processing. */ dig->init(&hc.vtable); dig->set_state(&hc.vtable, ctx->kso, (uint64_t)bs); dig->update(&hc.vtable, tmp2, hlen); dig->out(&hc.vtable, tmp2); memcpy(out, tmp2, ctx->out_len); return ctx->out_len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rand.h */ void br_aesctr_drbg_init(br_aesctr_drbg_context *ctx, const br_block_ctr_class *aesctr, const void *seed, size_t len) { unsigned char tmp[16]; ctx->vtable = &br_aesctr_drbg_vtable; memset(tmp, 0, sizeof tmp); aesctr->init(&ctx->sk.vtable, tmp, 16); ctx->cc = 0; br_aesctr_drbg_update(ctx, seed, len); } /* see bearssl_rand.h */ void br_aesctr_drbg_generate(br_aesctr_drbg_context *ctx, void *out, size_t len) { unsigned char *buf; unsigned char iv[12]; buf = (unsigned char*)out; memset(iv, 0, sizeof iv); while (len > 0) { size_t clen; /* * We generate data by blocks of at most 65280 bytes. This * allows for unambiguously testing the counter overflow * condition; also, it should work on 16-bit architectures * (where 'size_t' is 16 bits only). */ clen = len; if (clen > 65280) { clen = 65280; } /* * We make sure that the counter won't exceed the configured * limit. */ if ((uint32_t)(ctx->cc + ((clen + 15) >> 4)) > 32768) { clen = (32768 - ctx->cc) << 4; if (clen > len) { clen = len; } } /* * Run CTR. */ memset(buf, 0, clen); ctx->cc = ctx->sk.vtable->run(&ctx->sk.vtable, iv, ctx->cc, buf, clen); buf += clen; len -= clen; /* * Every 32768 blocks, we force a state update. */ if (ctx->cc >= 32768) { br_aesctr_drbg_update(ctx, NULL, 0); } } } /* see bearssl_rand.h */ void br_aesctr_drbg_update(br_aesctr_drbg_context *ctx, const void *seed, size_t len) { /* * We use a Hirose construction on AES-256 to make a hash function. * Function definition: * - running state consists in two 16-byte blocks G and H * - initial values of G and H are conventional * - there is a fixed block-sized constant C * - for next data block m: * set AES key to H||m * G' = E(G) xor G * H' = E(G xor C) xor G xor C * G <- G', H <- H' * - once all blocks have been processed, output is H||G * * Constants: * G_init = B6 B6 ... B6 * H_init = A5 A5 ... A5 * C = 01 00 ... 00 * * With this hash function h(), we compute the new state as * follows: * - produce a state-dependent value s as encryption of an * all-one block with AES and the current key * - compute the new key as the first 128 bits of h(s||seed) * * Original Hirose article: * https://www.iacr.org/archive/fse2006/40470213/40470213.pdf */ unsigned char s[16], iv[12]; unsigned char G[16], H[16]; int first; /* * Use an all-one IV to get a fresh output block that depends on the * current seed. */ memset(iv, 0xFF, sizeof iv); memset(s, 0, 16); ctx->sk.vtable->run(&ctx->sk.vtable, iv, 0xFFFFFFFF, s, 16); /* * Set G[] and H[] to conventional start values. */ memset(G, 0xB6, sizeof G); memset(H, 0x5A, sizeof H); /* * Process the concatenation of the current state and the seed * with the custom hash function. */ first = 1; for (;;) { unsigned char tmp[32]; unsigned char newG[16]; /* * Assemble new key H||m into tmp[]. */ memcpy(tmp, H, 16); if (first) { memcpy(tmp + 16, s, 16); first = 0; } else { size_t clen; if (len == 0) { break; } clen = len < 16 ? len : 16; memcpy(tmp + 16, seed, clen); memset(tmp + 16 + clen, 0, 16 - clen); seed = (const unsigned char *)seed + clen; len -= clen; } ctx->sk.vtable->init(&ctx->sk.vtable, tmp, 32); /* * Compute new G and H values. */ memcpy(iv, G, 12); memcpy(newG, G, 16); ctx->sk.vtable->run(&ctx->sk.vtable, iv, br_dec32be(G + 12), newG, 16); iv[0] ^= 0x01; memcpy(H, G, 16); H[0] ^= 0x01; ctx->sk.vtable->run(&ctx->sk.vtable, iv, br_dec32be(G + 12), H, 16); memcpy(G, newG, 16); } /* * Output hash value is H||G. We truncate it to its first 128 bits, * i.e. H; that's our new AES key. */ ctx->sk.vtable->init(&ctx->sk.vtable, H, 16); ctx->cc = 0; } /* see bearssl_rand.h */ const br_prng_class br_aesctr_drbg_vtable = { sizeof(br_aesctr_drbg_context), (void (*)(const br_prng_class **, const void *, const void *, size_t)) &br_aesctr_drbg_init, (void (*)(const br_prng_class **, void *, size_t)) &br_aesctr_drbg_generate, (void (*)(const br_prng_class **, const void *, size_t)) &br_aesctr_drbg_update }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl.h */ void br_hmac_drbg_init(br_hmac_drbg_context *ctx, const br_hash_class *digest_class, const void *seed, size_t len) { size_t hlen; ctx->vtable = &br_hmac_drbg_vtable; hlen = br_digest_size(digest_class); memset(ctx->K, 0x00, hlen); memset(ctx->V, 0x01, hlen); ctx->digest_class = digest_class; br_hmac_drbg_update(ctx, seed, len); } /* see bearssl.h */ void br_hmac_drbg_generate(br_hmac_drbg_context *ctx, void *out, size_t len) { const br_hash_class *dig; br_hmac_key_context kc; br_hmac_context hc; size_t hlen; unsigned char *buf; unsigned char x; dig = ctx->digest_class; hlen = br_digest_size(dig); br_hmac_key_init(&kc, dig, ctx->K, hlen); buf = (unsigned char*)out; while (len > 0) { size_t clen; br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); br_hmac_out(&hc, ctx->V); clen = hlen; if (clen > len) { clen = len; } memcpy(buf, ctx->V, clen); buf += clen; len -= clen; } /* * To prepare the state for the next request, we should call * br_hmac_drbg_update() with an empty additional seed. However, * we already have an initialized HMAC context with the right * initial key, and we don't want to push another one on the * stack, so we inline that update() call here. */ br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); x = 0x00; br_hmac_update(&hc, &x, 1); br_hmac_out(&hc, ctx->K); br_hmac_key_init(&kc, dig, ctx->K, hlen); br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); br_hmac_out(&hc, ctx->V); } /* see bearssl.h */ void br_hmac_drbg_update(br_hmac_drbg_context *ctx, const void *seed, size_t len) { const br_hash_class *dig; br_hmac_key_context kc; br_hmac_context hc; size_t hlen; unsigned char x; dig = ctx->digest_class; hlen = br_digest_size(dig); /* * 1. K = HMAC(K, V || 0x00 || seed) */ br_hmac_key_init(&kc, dig, ctx->K, hlen); br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); x = 0x00; br_hmac_update(&hc, &x, 1); br_hmac_update(&hc, seed, len); br_hmac_out(&hc, ctx->K); br_hmac_key_init(&kc, dig, ctx->K, hlen); /* * 2. V = HMAC(K, V) */ br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); br_hmac_out(&hc, ctx->V); /* * 3. If the additional seed is empty, then stop here. */ if (len == 0) { return; } /* * 4. K = HMAC(K, V || 0x01 || seed) */ br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); x = 0x01; br_hmac_update(&hc, &x, 1); br_hmac_update(&hc, seed, len); br_hmac_out(&hc, ctx->K); br_hmac_key_init(&kc, dig, ctx->K, hlen); /* * 5. V = HMAC(K, V) */ br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, ctx->V, hlen); br_hmac_out(&hc, ctx->V); } /* see bearssl.h */ const br_prng_class br_hmac_drbg_vtable = { sizeof(br_hmac_drbg_context), (void (*)(const br_prng_class **, const void *, const void *, size_t)) &br_hmac_drbg_init, (void (*)(const br_prng_class **, void *, size_t)) &br_hmac_drbg_generate, (void (*)(const br_prng_class **, const void *, size_t)) &br_hmac_drbg_update }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_USE_GETENTROPY #include #endif #if BR_USE_URANDOM #include #include #include #include #endif #if BR_USE_WIN32_RAND #include #include #pragma comment(lib, "advapi32") #endif /* * Seeder that uses the RDRAND opcodes (on x86 CPU). */ #if BR_RDRAND BR_TARGETS_X86_UP BR_TARGET("rdrnd") static int seeder_rdrand(const br_prng_class **ctx) { unsigned char tmp[32]; size_t u; for (u = 0; u < sizeof tmp; u += sizeof(uint32_t)) { int j; uint32_t x; /* * We use the 32-bit intrinsic so that code is compatible * with both 32-bit and 64-bit architectures. * * Intel recommends trying at least 10 times in case of * failure. * * AMD bug: there are reports that some AMD processors * have a bug that makes them fail silently after a * suspend/resume cycle, in which case RDRAND will report * a success but always return 0xFFFFFFFF. * see: https://bugzilla.kernel.org/show_bug.cgi?id=85911 * * As a mitigation, if the 32-bit value is 0 or -1, then * it is considered a failure and tried again. This should * reliably detect the buggy case, at least. This also * implies that the selected seed values can never be * 0x00000000 or 0xFFFFFFFF, which is not a problem since * we are generating a seed for a PRNG, and we overdo it * a bit (we generate 32 bytes of randomness, and 256 bits * of entropy are really overkill). */ for (j = 0; j < 10; j ++) { if (_rdrand32_step(&x) && x != 0 && x != (uint32_t)-1) { goto next_word; } } return 0; next_word: br_enc32le(tmp + u, x); } (*ctx)->update(ctx, tmp, sizeof tmp); return 1; } BR_TARGETS_X86_DOWN static int rdrand_supported(void) { /* * The RDRND support is bit 30 of ECX, as returned by CPUID. */ return br_cpuid(0, 0, 0x40000000, 0); } #endif /* * Seeder that uses /dev/urandom (on Unix-like systems). */ #if BR_USE_URANDOM static int seeder_urandom(const br_prng_class **ctx) { int f; f = open("/dev/urandom", O_RDONLY); if (f >= 0) { unsigned char tmp[32]; size_t u; for (u = 0; u < sizeof tmp;) { ssize_t len; len = read(f, tmp + u, (sizeof tmp) - u); if (len < 0) { if (errno == EINTR) { continue; } break; } u += (size_t)len; } close(f); if (u == sizeof tmp) { (*ctx)->update(ctx, tmp, sizeof tmp); return 1; } } return 0; } #endif /* * Seeder that uses getentropy() (backed by getrandom() on some systems, * e.g. Linux). On failure, it will use the /dev/urandom seeder (if * enabled). */ #if BR_USE_GETENTROPY static int seeder_getentropy(const br_prng_class **ctx) { unsigned char tmp[32]; if (getentropy(tmp, sizeof tmp) == 0) { (*ctx)->update(ctx, tmp, sizeof tmp); return 1; } #if BR_USE_URANDOM return seeder_urandom(ctx); #else return 0; #endif } #endif /* * Seeder that uses CryptGenRandom() (on Windows). */ #if BR_USE_WIN32_RAND static int seeder_win32(const br_prng_class **ctx) { HCRYPTPROV hp; if (CryptAcquireContext(&hp, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) { BYTE buf[32]; BOOL r; r = CryptGenRandom(hp, sizeof buf, buf); CryptReleaseContext(hp, 0); if (r) { (*ctx)->update(ctx, buf, sizeof buf); return 1; } } return 0; } #endif /* * An aggregate seeder that uses RDRAND, and falls back to an OS-provided * source if RDRAND fails. */ #if BR_RDRAND && (BR_USE_GETENTROPY || BR_USE_URANDOM || BR_USE_WIN32_RAND) static int seeder_rdrand_with_fallback(const br_prng_class **ctx) { if (!seeder_rdrand(ctx)) { #if BR_USE_GETENTROPY return seeder_getentropy(ctx); #elif BR_USE_URANDOM return seeder_urandom(ctx); #elif BR_USE_WIN32_RAND return seeder_win32(ctx); #else #error "macro selection has gone wrong" #endif } return 1; } #endif /* see bearssl_rand.h */ br_prng_seeder br_prng_seeder_system(const char **name) { #if BR_RDRAND if (rdrand_supported()) { if (name != NULL) { *name = "rdrand"; } #if BR_USE_GETENTROPY || BR_USE_URANDOM || BR_USE_WIN32_RAND return &seeder_rdrand_with_fallback; #else return &seeder_rdrand; #endif } #endif #if BR_USE_GETENTROPY if (name != NULL) { *name = "getentropy"; } return &seeder_getentropy; #elif BR_USE_URANDOM if (name != NULL) { *name = "urandom"; } return &seeder_urandom; #elif BR_USE_WIN32_RAND if (name != NULL) { *name = "win32"; } return &seeder_win32; #else if (name != NULL) { *name = "none"; } return 0; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_keygen br_rsa_keygen_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_keygen; #elif BR_LOMUL return &br_rsa_i15_keygen; #else return &br_rsa_i31_keygen; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_compute_modulus br_rsa_compute_modulus_get_default(void) { #if BR_LOMUL return &br_rsa_i15_compute_modulus; #else return &br_rsa_i31_compute_modulus; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_oaep_decrypt br_rsa_oaep_decrypt_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_oaep_decrypt; #elif BR_LOMUL return &br_rsa_i15_oaep_decrypt; #else return &br_rsa_i31_oaep_decrypt; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_oaep_encrypt br_rsa_oaep_encrypt_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_oaep_encrypt; #elif BR_LOMUL return &br_rsa_i15_oaep_encrypt; #else return &br_rsa_i31_oaep_encrypt; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_pkcs1_sign br_rsa_pkcs1_sign_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_pkcs1_sign; #elif BR_LOMUL return &br_rsa_i15_pkcs1_sign; #else return &br_rsa_i31_pkcs1_sign; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_pkcs1_vrfy br_rsa_pkcs1_vrfy_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_pkcs1_vrfy; #elif BR_LOMUL return &br_rsa_i15_pkcs1_vrfy; #else return &br_rsa_i31_pkcs1_vrfy; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_private br_rsa_private_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_private; #elif BR_LOMUL return &br_rsa_i15_private; #else return &br_rsa_i31_private; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_compute_privexp br_rsa_compute_privexp_get_default(void) { #if BR_LOMUL return &br_rsa_i15_compute_privexp; #else return &br_rsa_i31_compute_privexp; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_pss_sign br_rsa_pss_sign_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_pss_sign; #elif BR_LOMUL return &br_rsa_i15_pss_sign; #else return &br_rsa_i31_pss_sign; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_pss_vrfy br_rsa_pss_vrfy_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_pss_vrfy; #elif BR_LOMUL return &br_rsa_i15_pss_vrfy; #else return &br_rsa_i31_pss_vrfy; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_public br_rsa_public_get_default(void) { #if BR_INT128 || BR_UMUL128 return &br_rsa_i62_public; #elif BR_LOMUL return &br_rsa_i15_public; #else return &br_rsa_i31_public; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ br_rsa_compute_pubexp br_rsa_compute_pubexp_get_default(void) { #if BR_LOMUL return &br_rsa_i15_compute_pubexp; #else return &br_rsa_i31_compute_pubexp; #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Make a random integer of the provided size. The size is encoded. * The header word is untouched. */ static void _src_rsa_rsa_i15_keygen_cmkrand(const br_prng_class **rng, uint16_t *x, uint32_t esize) { size_t u, len; unsigned m; len = (esize + 15) >> 4; (*rng)->generate(rng, x + 1, len * sizeof(uint16_t)); for (u = 1; u < len; u ++) { x[u] &= 0x7FFF; } m = esize & 15; if (m == 0) { x[len] &= 0x7FFF; } else { x[len] &= 0x7FFF >> (15 - m); } } /* * This is the big-endian unsigned representation of the product of * all small primes from 13 to 1481. */ static const unsigned char _src_rsa_rsa_i15_keygen_cSMALL_PRIMES[] = { 0x2E, 0xAB, 0x92, 0xD1, 0x8B, 0x12, 0x47, 0x31, 0x54, 0x0A, 0x99, 0x5D, 0x25, 0x5E, 0xE2, 0x14, 0x96, 0x29, 0x1E, 0xB7, 0x78, 0x70, 0xCC, 0x1F, 0xA5, 0xAB, 0x8D, 0x72, 0x11, 0x37, 0xFB, 0xD8, 0x1E, 0x3F, 0x5B, 0x34, 0x30, 0x17, 0x8B, 0xE5, 0x26, 0x28, 0x23, 0xA1, 0x8A, 0xA4, 0x29, 0xEA, 0xFD, 0x9E, 0x39, 0x60, 0x8A, 0xF3, 0xB5, 0xA6, 0xEB, 0x3F, 0x02, 0xB6, 0x16, 0xC3, 0x96, 0x9D, 0x38, 0xB0, 0x7D, 0x82, 0x87, 0x0C, 0xF7, 0xBE, 0x24, 0xE5, 0x5F, 0x41, 0x04, 0x79, 0x76, 0x40, 0xE7, 0x00, 0x22, 0x7E, 0xB5, 0x85, 0x7F, 0x8D, 0x01, 0x50, 0xE9, 0xD3, 0x29, 0x42, 0x08, 0xB3, 0x51, 0x40, 0x7B, 0xD7, 0x8D, 0xCC, 0x10, 0x01, 0x64, 0x59, 0x28, 0xB6, 0x53, 0xF3, 0x50, 0x4E, 0xB1, 0xF2, 0x58, 0xCD, 0x6E, 0xF5, 0x56, 0x3E, 0x66, 0x2F, 0xD7, 0x07, 0x7F, 0x52, 0x4C, 0x13, 0x24, 0xDC, 0x8E, 0x8D, 0xCC, 0xED, 0x77, 0xC4, 0x21, 0xD2, 0xFD, 0x08, 0xEA, 0xD7, 0xC0, 0x5C, 0x13, 0x82, 0x81, 0x31, 0x2F, 0x2B, 0x08, 0xE4, 0x80, 0x04, 0x7A, 0x0C, 0x8A, 0x3C, 0xDC, 0x22, 0xE4, 0x5A, 0x7A, 0xB0, 0x12, 0x5E, 0x4A, 0x76, 0x94, 0x77, 0xC2, 0x0E, 0x92, 0xBA, 0x8A, 0xA0, 0x1F, 0x14, 0x51, 0x1E, 0x66, 0x6C, 0x38, 0x03, 0x6C, 0xC7, 0x4A, 0x4B, 0x70, 0x80, 0xAF, 0xCA, 0x84, 0x51, 0xD8, 0xD2, 0x26, 0x49, 0xF5, 0xA8, 0x5E, 0x35, 0x4B, 0xAC, 0xCE, 0x29, 0x92, 0x33, 0xB7, 0xA2, 0x69, 0x7D, 0x0C, 0xE0, 0x9C, 0xDB, 0x04, 0xD6, 0xB4, 0xBC, 0x39, 0xD7, 0x7F, 0x9E, 0x9D, 0x78, 0x38, 0x7F, 0x51, 0x54, 0x50, 0x8B, 0x9E, 0x9C, 0x03, 0x6C, 0xF5, 0x9D, 0x2C, 0x74, 0x57, 0xF0, 0x27, 0x2A, 0xC3, 0x47, 0xCA, 0xB9, 0xD7, 0x5C, 0xFF, 0xC2, 0xAC, 0x65, 0x4E, 0xBD }; /* * We need temporary values for at least 7 integers of the same size * as a factor (including header word); more space helps with performance * (in modular exponentiations), but we much prefer to remain under * 2 kilobytes in total, to save stack space. The macro _src_rsa_rsa_i15_keygen_cTEMPS below * exceeds 1024 (which is a count in 16-bit words) when BR_MAX_RSA_SIZE * is greater than 4350 (default value is 4096, so the 2-kB limit is * maintained unless BR_MAX_RSA_SIZE was modified). */ #define MAX(x, y) ((x) > (y) ? (x) : (y)) #define _src_rsa_rsa_i15_keygen_cTEMPS MAX(1024, 7 * ((((BR_MAX_RSA_SIZE + 1) >> 1) + 29) / 15)) /* * Perform trial division on a candidate prime. This computes * y = _src_rsa_rsa_i15_keygen_cSMALL_PRIMES mod x, then tries to compute y/y mod x. The * br_i15_moddiv() function will report an error if y is not invertible * modulo x. Returned value is 1 on success (none of the small primes * divides x), 0 on error (a non-trivial GCD is obtained). * * This function assumes that x is odd. */ static uint32_t _src_rsa_rsa_i15_keygen_ctrial_divisions(const uint16_t *x, uint16_t *t) { uint16_t *y; uint16_t x0i; y = t; t += 1 + ((x[0] + 15) >> 4); x0i = br_i15_ninv15(x[1]); br_i15_decode_reduce(y, _src_rsa_rsa_i15_keygen_cSMALL_PRIMES, sizeof _src_rsa_rsa_i15_keygen_cSMALL_PRIMES, x); return br_i15_moddiv(y, y, x, x0i, t); } /* * Perform n rounds of Miller-Rabin on the candidate prime x. This * function assumes that x = 3 mod 4. * * Returned value is 1 on success (all rounds completed successfully), * 0 otherwise. */ static uint32_t _src_rsa_rsa_i15_keygen_cmiller_rabin(const br_prng_class **rng, const uint16_t *x, int n, uint16_t *t, size_t tlen) { /* * Since x = 3 mod 4, the Miller-Rabin test is simple: * - get a random base a (such that 1 < a < x-1) * - compute z = a^((x-1)/2) mod x * - if z != 1 and z != x-1, the number x is composite * * We generate bases 'a' randomly with a size which is * one bit less than x, which ensures that a < x-1. It * is not useful to verify that a > 1 because the probability * that we get a value a equal to 0 or 1 is much smaller * than the probability of our Miller-Rabin tests not to * detect a composite, which is already quite smaller than the * probability of the hardware misbehaving and return a * composite integer because of some glitch (e.g. bad RAM * or ill-timed cosmic ray). */ unsigned char *xm1d2; size_t xlen, xm1d2_len, xm1d2_len_u16, u; uint32_t asize; unsigned cc; uint16_t x0i; /* * Compute (x-1)/2 (encoded). */ xm1d2 = (unsigned char *)t; xm1d2_len = ((x[0] - (x[0] >> 4)) + 7) >> 3; br_i15_encode(xm1d2, xm1d2_len, x); cc = 0; for (u = 0; u < xm1d2_len; u ++) { unsigned w; w = xm1d2[u]; xm1d2[u] = (unsigned char)((w >> 1) | cc); cc = w << 7; } /* * We used some words of the provided buffer for (x-1)/2. */ xm1d2_len_u16 = (xm1d2_len + 1) >> 1; t += xm1d2_len_u16; tlen -= xm1d2_len_u16; xlen = (x[0] + 15) >> 4; asize = x[0] - 1 - EQ0(x[0] & 15); x0i = br_i15_ninv15(x[1]); while (n -- > 0) { uint16_t *a; uint32_t eq1, eqm1; /* * Generate a random base. We don't need the base to be * really uniform modulo x, so we just get a random * number which is one bit shorter than x. */ a = t; a[0] = x[0]; a[xlen] = 0; _src_rsa_rsa_i15_keygen_cmkrand(rng, a, asize); /* * Compute a^((x-1)/2) mod x. We assume here that the * function will not fail (the temporary array is large * enough). */ br_i15_modpow_opt(a, xm1d2, xm1d2_len, x, x0i, t + 1 + xlen, tlen - 1 - xlen); /* * We must obtain either 1 or x-1. Note that x is odd, * hence x-1 differs from x only in its low word (no * carry). */ eq1 = a[1] ^ 1; eqm1 = a[1] ^ (x[1] - 1); for (u = 2; u <= xlen; u ++) { eq1 |= a[u]; eqm1 |= a[u] ^ x[u]; } if ((EQ0(eq1) | EQ0(eqm1)) == 0) { return 0; } } return 1; } /* * Create a random prime of the provided size. 'size' is the _encoded_ * bit length. The two top bits and the two bottom bits are set to 1. */ static void _src_rsa_rsa_i15_keygen_cmkprime(const br_prng_class **rng, uint16_t *x, uint32_t esize, uint32_t pubexp, uint16_t *t, size_t tlen) { size_t len; x[0] = esize; len = (esize + 15) >> 4; for (;;) { size_t u; uint32_t m3, m5, m7, m11; int rounds; /* * Generate random bits. We force the two top bits and the * two bottom bits to 1. */ _src_rsa_rsa_i15_keygen_cmkrand(rng, x, esize); if ((esize & 15) == 0) { x[len] |= 0x6000; } else if ((esize & 15) == 1) { x[len] |= 0x0001; x[len - 1] |= 0x4000; } else { x[len] |= 0x0003 << ((esize & 15) - 2); } x[1] |= 0x0003; /* * Trial division with low primes (3, 5, 7 and 11). We * use the following properties: * * 2^2 = 1 mod 3 * 2^4 = 1 mod 5 * 2^3 = 1 mod 7 * 2^10 = 1 mod 11 */ m3 = 0; m5 = 0; m7 = 0; m11 = 0; for (u = 0; u < len; u ++) { uint32_t w; w = x[1 + u]; m3 += w << (u & 1); m3 = (m3 & 0xFF) + (m3 >> 8); m5 += w << ((4 - u) & 3); m5 = (m5 & 0xFF) + (m5 >> 8); m7 += w; m7 = (m7 & 0x1FF) + (m7 >> 9); m11 += w << (5 & -(u & 1)); m11 = (m11 & 0x3FF) + (m11 >> 10); } /* * Maximum values of m* at this point: * m3: 511 * m5: 2310 * m7: 510 * m11: 2047 * We use the same properties to make further reductions. */ m3 = (m3 & 0x0F) + (m3 >> 4); /* max: 46 */ m3 = (m3 & 0x0F) + (m3 >> 4); /* max: 16 */ m3 = ((m3 * 43) >> 5) & 3; m5 = (m5 & 0xFF) + (m5 >> 8); /* max: 263 */ m5 = (m5 & 0x0F) + (m5 >> 4); /* max: 30 */ m5 = (m5 & 0x0F) + (m5 >> 4); /* max: 15 */ m5 -= 10 & -GT(m5, 9); m5 -= 5 & -GT(m5, 4); m7 = (m7 & 0x3F) + (m7 >> 6); /* max: 69 */ m7 = (m7 & 7) + (m7 >> 3); /* max: 14 */ m7 = ((m7 * 147) >> 7) & 7; /* * 2^5 = 32 = -1 mod 11. */ m11 = (m11 & 0x1F) + 66 - (m11 >> 5); /* max: 97 */ m11 -= 88 & -GT(m11, 87); m11 -= 44 & -GT(m11, 43); m11 -= 22 & -GT(m11, 21); m11 -= 11 & -GT(m11, 10); /* * If any of these modulo is 0, then the candidate is * not prime. Also, if pubexp is 3, 5, 7 or 11, and the * corresponding modulus is 1, then the candidate must * be rejected, because we need e to be invertible * modulo p-1. We can use simple comparisons here * because they won't leak information on a candidate * that we keep, only on one that we reject (and is thus * not secret). */ if (m3 == 0 || m5 == 0 || m7 == 0 || m11 == 0) { continue; } if ((pubexp == 3 && m3 == 1) || (pubexp == 5 && m5 == 1) || (pubexp == 7 && m7 == 1) || (pubexp == 11 && m11 == 1)) { continue; } /* * More trial divisions. */ if (!_src_rsa_rsa_i15_keygen_ctrial_divisions(x, t)) { continue; } /* * Miller-Rabin algorithm. Since we selected a random * integer, not a maliciously crafted integer, we can use * relatively few rounds to lower the risk of a false * positive (i.e. declaring prime a non-prime) under * 2^(-80). It is not useful to lower the probability much * below that, since that would be substantially below * the probability of the hardware misbehaving. Sufficient * numbers of rounds are extracted from the Handbook of * Applied Cryptography, note 4.49 (page 149). * * Since we work on the encoded size (esize), we need to * compare with encoded thresholds. */ if (esize < 320) { rounds = 12; } else if (esize < 480) { rounds = 9; } else if (esize < 693) { rounds = 6; } else if (esize < 906) { rounds = 4; } else if (esize < 1386) { rounds = 3; } else { rounds = 2; } if (_src_rsa_rsa_i15_keygen_cmiller_rabin(rng, x, rounds, t, tlen)) { return; } } } /* * Let p be a prime (p > 2^33, p = 3 mod 4). Let m = (p-1)/2, provided * as parameter (with announced bit length equal to that of p). This * function computes d = 1/e mod p-1 (for an odd integer e). Returned * value is 1 on success, 0 on error (an error is reported if e is not * invertible modulo p-1). * * The temporary buffer (t) must have room for at least 4 integers of * the size of p. */ static uint32_t _src_rsa_rsa_i15_keygen_cinvert_pubexp(uint16_t *d, const uint16_t *m, uint32_t e, uint16_t *t) { uint16_t *f; uint32_t r; f = t; t += 1 + ((m[0] + 15) >> 4); /* * Compute d = 1/e mod m. Since p = 3 mod 4, m is odd. */ br_i15_zero(d, m[0]); d[1] = 1; br_i15_zero(f, m[0]); f[1] = e & 0x7FFF; f[2] = (e >> 15) & 0x7FFF; f[3] = e >> 30; r = br_i15_moddiv(d, f, m, br_i15_ninv15(m[1]), t); /* * We really want d = 1/e mod p-1, with p = 2m. By the CRT, * the result is either the d we got, or d + m. * * Let's write e*d = 1 + k*m, for some integer k. Integers e * and m are odd. If d is odd, then e*d is odd, which implies * that k must be even; in that case, e*d = 1 + (k/2)*2m, and * thus d is already fine. Conversely, if d is even, then k * is odd, and we must add m to d in order to get the correct * result. */ br_i15_add(d, m, (uint32_t)(1 - (d[1] & 1))); return r; } /* * Swap two buffers in RAM. They must be disjoint. */ static void _src_rsa_rsa_i15_keygen_cbufswap(void *b1, void *b2, size_t len) { size_t u; unsigned char *buf1, *buf2; buf1 = (unsigned char*)b1; buf2 = (unsigned char*)b2; for (u = 0; u < len; u ++) { unsigned w; w = buf1[u]; buf1[u] = buf2[u]; buf2[u] = w; } } /* see bearssl_rsa.h */ uint32_t br_rsa_i15_keygen(const br_prng_class **rng, br_rsa_private_key *sk, void *kbuf_priv, br_rsa_public_key *pk, void *kbuf_pub, unsigned size, uint32_t pubexp) { uint32_t esize_p, esize_q; size_t plen, qlen, tlen; uint16_t *p, *q, *t; uint16_t tmp[_src_rsa_rsa_i15_keygen_cTEMPS]; uint32_t r; if (size < BR_MIN_RSA_SIZE || size > BR_MAX_RSA_SIZE) { return 0; } if (pubexp == 0) { pubexp = 3; } else if (pubexp == 1 || (pubexp & 1) == 0) { return 0; } esize_p = (size + 1) >> 1; esize_q = size - esize_p; sk->n_bitlen = size; sk->p = (unsigned char*)kbuf_priv; sk->plen = (esize_p + 7) >> 3; sk->q = sk->p + sk->plen; sk->qlen = (esize_q + 7) >> 3; sk->dp = sk->q + sk->qlen; sk->dplen = sk->plen; sk->dq = sk->dp + sk->dplen; sk->dqlen = sk->qlen; sk->iq = sk->dq + sk->dqlen; sk->iqlen = sk->plen; if (pk != NULL) { pk->n = (unsigned char*)kbuf_pub; pk->nlen = (size + 7) >> 3; pk->e = pk->n + pk->nlen; pk->elen = 4; br_enc32be(pk->e, pubexp); while (*pk->e == 0) { pk->e ++; pk->elen --; } } /* * We now switch to encoded sizes. * * floor((x * 17477) / (2^18)) is equal to floor(x/15) for all * integers x from 0 to 23833. */ esize_p += MUL15(esize_p, 17477) >> 18; esize_q += MUL15(esize_q, 17477) >> 18; plen = (esize_p + 15) >> 4; qlen = (esize_q + 15) >> 4; p = tmp; q = p + 1 + plen; t = q + 1 + qlen; tlen = ((sizeof tmp) / sizeof(uint16_t)) - (2 + plen + qlen); /* * When looking for primes p and q, we temporarily divide * candidates by 2, in order to compute the inverse of the * public exponent. */ for (;;) { _src_rsa_rsa_i15_keygen_cmkprime(rng, p, esize_p, pubexp, t, tlen); br_i15_rshift(p, 1); if (_src_rsa_rsa_i15_keygen_cinvert_pubexp(t, p, pubexp, t + 1 + plen)) { br_i15_add(p, p, 1); p[1] |= 1; br_i15_encode(sk->p, sk->plen, p); br_i15_encode(sk->dp, sk->dplen, t); break; } } for (;;) { _src_rsa_rsa_i15_keygen_cmkprime(rng, q, esize_q, pubexp, t, tlen); br_i15_rshift(q, 1); if (_src_rsa_rsa_i15_keygen_cinvert_pubexp(t, q, pubexp, t + 1 + qlen)) { br_i15_add(q, q, 1); q[1] |= 1; br_i15_encode(sk->q, sk->qlen, q); br_i15_encode(sk->dq, sk->dqlen, t); break; } } /* * If p and q have the same size, then it is possible that q > p * (when the target modulus size is odd, we generate p with a * greater bit length than q). If q > p, we want to swap p and q * (and also dp and dq) for two reasons: * - The final step below (inversion of q modulo p) is easier if * p > q. * - While BearSSL's RSA code is perfectly happy with RSA keys such * that p < q, some other implementations have restrictions and * require p > q. * * Note that we can do a simple non-constant-time swap here, * because the only information we leak here is that we insist on * returning p and q such that p > q, which is not a secret. */ if (esize_p == esize_q && br_i15_sub(p, q, 0) == 1) { _src_rsa_rsa_i15_keygen_cbufswap(p, q, (1 + plen) * sizeof *p); _src_rsa_rsa_i15_keygen_cbufswap(sk->p, sk->q, sk->plen); _src_rsa_rsa_i15_keygen_cbufswap(sk->dp, sk->dq, sk->dplen); } /* * We have produced p, q, dp and dq. We can now compute iq = 1/d mod p. * * We ensured that p >= q, so this is just a matter of updating the * header word for q (and possibly adding an extra word). * * Theoretically, the call below may fail, in case we were * extraordinarily unlucky, and p = q. Another failure case is if * Miller-Rabin failed us _twice_, and p and q are non-prime and * have a factor is common. We report the error mostly because it * is cheap and we can, but in practice this never happens (or, at * least, it happens way less often than hardware glitches). */ q[0] = p[0]; if (plen > qlen) { q[plen] = 0; t ++; tlen --; } br_i15_zero(t, p[0]); t[1] = 1; r = br_i15_moddiv(t, q, p, br_i15_ninv15(p[1]), t + 1 + plen); br_i15_encode(sk->iq, sk->iqlen, t); /* * Compute the public modulus too, if required. */ if (pk != NULL) { br_i15_zero(t, p[0]); br_i15_mulacc(t, p, q); br_i15_encode(pk->n, pk->nlen, t); } return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i15_compute_modulus(void *n, const br_rsa_private_key *sk) { uint16_t tmp[4 * (((BR_MAX_RSA_SIZE / 2) + 14) / 15) + 5]; uint16_t *t, *p, *q; const unsigned char *pbuf, *qbuf; size_t nlen, plen, qlen, tlen; /* * Compute actual byte and lengths for p and q. */ pbuf = sk->p; plen = sk->plen; while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } qbuf = sk->q; qlen = sk->qlen; while (qlen > 0 && *qbuf == 0) { qbuf ++; qlen --; } t = tmp; tlen = (sizeof tmp) / (sizeof tmp[0]); /* * Decode p. */ if ((15 * tlen) < (plen << 3) + 15) { return 0; } br_i15_decode(t, pbuf, plen); p = t; plen = (p[0] + 31) >> 4; t += plen; tlen -= plen; /* * Decode q. */ if ((15 * tlen) < (qlen << 3) + 15) { return 0; } br_i15_decode(t, qbuf, qlen); q = t; qlen = (q[0] + 31) >> 4; t += qlen; tlen -= qlen; /* * Computation can proceed only if we have enough room for the * modulus. */ if (tlen < (plen + qlen + 1)) { return 0; } /* * Private key already contains the modulus bit length, from which * we can infer the output length. Even if n is NULL, we still had * to decode p and q to make sure that the product can be computed. */ nlen = (sk->n_bitlen + 7) >> 3; if (n != NULL) { br_i15_zero(t, p[0]); br_i15_mulacc(t, p, q); br_i15_encode(n, nlen, t); } return nlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i15_oaep_decrypt(const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_private_key *sk, void *data, size_t *len) { uint32_t r; if (*len != ((sk->n_bitlen + 7) >> 3)) { return 0; } r = br_rsa_i15_private((unsigned char*)data, sk); r &= br_rsa_oaep_unpad(dig, label, label_len, data, len); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i15_oaep_encrypt( const br_prng_class **rnd, const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_public_key *pk, void *dst, size_t dst_max_len, const void *src, size_t src_len) { size_t dlen; dlen = br_rsa_oaep_pad(rnd, dig, label, label_len, pk, dst, dst_max_len, src, src_len); if (dlen == 0) { return 0; } return dlen & -(size_t)br_rsa_i15_public((unsigned char*)dst, dlen, pk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i15_pkcs1_sign(const unsigned char *hash_oid, const unsigned char *hash, size_t hash_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pkcs1_sig_pad(hash_oid, hash, hash_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i15_private(x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i15_pkcs1_vrfy(const unsigned char *x, size_t xlen, const unsigned char *hash_oid, size_t hash_len, const br_rsa_public_key *pk, unsigned char *hash_out) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i15_public(sig, xlen, pk)) { return 0; } return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define U (2 + ((BR_MAX_RSA_FACTOR + 14) / 15)) #define _src_rsa_rsa_i15_priv_cTLEN (8 * U) /* see bearssl_rsa.h */ uint32_t br_rsa_i15_private(unsigned char *x, const br_rsa_private_key *sk) { const unsigned char *p, *q; size_t plen, qlen; size_t fwlen; uint16_t p0i, q0i; size_t xlen, u; uint16_t tmp[1 + _src_rsa_rsa_i15_priv_cTLEN]; long z; uint16_t *mp, *mq, *s1, *s2, *t1, *t2, *t3; uint32_t r; /* * Compute the actual lengths of p and q, in bytes. * These lengths are not considered secret (we cannot really hide * them anyway in constant-time code). */ p = sk->p; plen = sk->plen; while (plen > 0 && *p == 0) { p ++; plen --; } q = sk->q; qlen = sk->qlen; while (qlen > 0 && *q == 0) { q ++; qlen --; } /* * Compute the maximum factor length, in words. */ z = (long)(plen > qlen ? plen : qlen) << 3; fwlen = 1; while (z > 0) { z -= 15; fwlen ++; } /* * Round up the word length to an even number. */ fwlen += (fwlen & 1); /* * We need to fit at least 6 values in the stack buffer. */ if (6 * fwlen > _src_rsa_rsa_i15_priv_cTLEN) { return 0; } /* * Compute signature length (in bytes). */ xlen = (sk->n_bitlen + 7) >> 3; /* * Ensure 32-bit alignment for value words. */ mq = tmp; if (((uintptr_t)mq & 2) == 0) { mq ++; } /* * Decode q. */ br_i15_decode(mq, q, qlen); /* * Decode p. */ t1 = mq + fwlen; br_i15_decode(t1, p, plen); /* * Compute the modulus (product of the two factors), to compare * it with the source value. We use br_i15_mulacc(), since it's * already used later on. */ t2 = mq + 2 * fwlen; br_i15_zero(t2, mq[0]); br_i15_mulacc(t2, mq, t1); /* * We encode the modulus into bytes, to perform the comparison * with bytes. We know that the product length, in bytes, is * exactly xlen. * The comparison actually computes the carry when subtracting * the modulus from the source value; that carry must be 1 for * a value in the correct range. We keep it in r, which is our * accumulator for the error code. */ t3 = mq + 4 * fwlen; br_i15_encode(t3, xlen, t2); u = xlen; r = 0; while (u > 0) { uint32_t wn, wx; u --; wn = ((unsigned char *)t3)[u]; wx = x[u]; r = ((wx - (wn + r)) >> 8) & 1; } /* * Move the decoded p to another temporary buffer. */ mp = mq + 2 * fwlen; memmove(mp, t1, fwlen * sizeof *t1); /* * Compute s2 = x^dq mod q. */ q0i = br_i15_ninv15(mq[1]); s2 = mq + fwlen; br_i15_decode_reduce(s2, x, xlen, mq); r &= br_i15_modpow_opt(s2, sk->dq, sk->dqlen, mq, q0i, mq + 3 * fwlen, _src_rsa_rsa_i15_priv_cTLEN - 3 * fwlen); /* * Compute s1 = x^dq mod q. */ p0i = br_i15_ninv15(mp[1]); s1 = mq + 3 * fwlen; br_i15_decode_reduce(s1, x, xlen, mp); r &= br_i15_modpow_opt(s1, sk->dp, sk->dplen, mp, p0i, mq + 4 * fwlen, _src_rsa_rsa_i15_priv_cTLEN - 4 * fwlen); /* * Compute: * h = (s1 - s2)*(1/q) mod p * s1 is an integer modulo p, but s2 is modulo q. PKCS#1 is * unclear about whether p may be lower than q (some existing, * widely deployed implementations of RSA don't tolerate p < q), * but we want to support that occurrence, so we need to use the * reduction function. * * Since we use br_i15_decode_reduce() for iq (purportedly, the * inverse of q modulo p), we also tolerate improperly large * values for this parameter. */ t1 = mq + 4 * fwlen; t2 = mq + 5 * fwlen; br_i15_reduce(t2, s2, mp); br_i15_add(s1, mp, br_i15_sub(s1, t2, 1)); br_i15_to_monty(s1, mp); br_i15_decode_reduce(t1, sk->iq, sk->iqlen, mp); br_i15_montymul(t2, s1, t1, mp, p0i); /* * h is now in t2. We compute the final result: * s = s2 + q*h * All these operations are non-modular. * * We need mq, s2 and t2. We use the t3 buffer as destination. * The buffers mp, s1 and t1 are no longer needed, so we can * reuse them for t3. Moreover, the first step of the computation * is to copy s2 into t3, after which s2 is not needed. Right * now, mq is in slot 0, s2 is in slot 1, and t2 in slot 5. * Therefore, we have ample room for t3 by simply using s2. */ t3 = s2; br_i15_mulacc(t3, mq, t2); /* * Encode the result. Since we already checked the value of xlen, * we can just use it right away. */ br_i15_encode(x, xlen, t3); /* * The only error conditions remaining at that point are invalid * values for p and q (even integers). */ return p0i & q0i & r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i15_compute_privexp(void *d, const br_rsa_private_key *sk, uint32_t e) { /* * We want to invert e modulo phi = (p-1)(q-1). This first * requires computing phi, which is easy since we have the factors * p and q in the private key structure. * * Since p = 3 mod 4 and q = 3 mod 4, phi/4 is an odd integer. * We could invert e modulo phi/4 then patch the result to * modulo phi, but this would involve assembling three modulus-wide * values (phi/4, 1 and e) and calling moddiv, that requires * three more temporaries, for a total of six big integers, or * slightly more than 3 kB of stack space for RSA-4096. This * exceeds our stack requirements. * * Instead, we first use one step of the extended GCD: * * - We compute phi = k*e + r (Euclidean division of phi by e). * If public exponent e is correct, then r != 0 (e must be * invertible modulo phi). We also have k != 0 since we * enforce non-ridiculously-small factors. * * - We find small u, v such that u*e - v*r = 1 (using a * binary GCD; we can arrange for u < r and v < e, i.e. all * values fit on 32 bits). * * - Solution is: d = u + v*k * This last computation is exact: since u < r and v < e, * the above implies d < r + e*((phi-r)/e) = phi */ uint16_t tmp[4 * ((BR_MAX_RSA_FACTOR + 14) / 15) + 12]; uint16_t *p, *q, *k, *m, *z, *phi; const unsigned char *pbuf, *qbuf; size_t plen, qlen, u, len, dlen; uint32_t r, a, b, u0, v0, u1, v1, he, hr; int i; /* * Check that e is correct. */ if (e < 3 || (e & 1) == 0) { return 0; } /* * Check lengths of p and q, and that they are both odd. */ pbuf = sk->p; plen = sk->plen; while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } if (plen < 5 || plen > (BR_MAX_RSA_FACTOR / 8) || (pbuf[plen - 1] & 1) != 1) { return 0; } qbuf = sk->q; qlen = sk->qlen; while (qlen > 0 && *qbuf == 0) { qbuf ++; qlen --; } if (qlen < 5 || qlen > (BR_MAX_RSA_FACTOR / 8) || (qbuf[qlen - 1] & 1) != 1) { return 0; } /* * Output length is that of the modulus. */ dlen = (sk->n_bitlen + 7) >> 3; if (d == NULL) { return dlen; } p = tmp; br_i15_decode(p, pbuf, plen); plen = (p[0] + 15) >> 4; q = p + 1 + plen; br_i15_decode(q, qbuf, qlen); qlen = (q[0] + 15) >> 4; /* * Compute phi = (p-1)*(q-1), then move it over p-1 and q-1 (that * we do not need anymore). The mulacc function sets the announced * bit length of t to be the sum of the announced bit lengths of * p-1 and q-1, which is usually exact but may overshoot by one 1 * bit in some cases; we readjust it to its true length. */ p[1] --; q[1] --; phi = q + 1 + qlen; br_i15_zero(phi, p[0]); br_i15_mulacc(phi, p, q); len = (phi[0] + 15) >> 4; memmove(tmp, phi, (1 + len) * sizeof *phi); phi = tmp; phi[0] = br_i15_bit_length(phi + 1, len); len = (phi[0] + 15) >> 4; /* * Divide phi by public exponent e. The final remainder r must be * non-zero (otherwise, the key is invalid). The quotient is k, * which we write over phi, since we don't need phi after that. */ r = 0; for (u = len; u >= 1; u --) { /* * Upon entry, r < e, and phi[u] < 2^15; hence, * hi:lo < e*2^15. Thus, the produced word k[u] * must be lower than 2^15, and the new remainder r * is lower than e. */ uint32_t hi, lo; hi = r >> 17; lo = (r << 15) + phi[u]; phi[u] = br_divrem(hi, lo, e, &r); } if (r == 0) { return 0; } k = phi; /* * Compute u and v such that u*e - v*r = GCD(e,r). We use * a binary GCD algorithm, with 6 extra integers a, b, * u0, u1, v0 and v1. Initial values are: * a = e u0 = 1 v0 = 0 * b = r u1 = r v1 = e-1 * The following invariants are maintained: * a = u0*e - v0*r * b = u1*e - v1*r * 0 < a <= e * 0 < b <= r * 0 <= u0 <= r * 0 <= v0 <= e * 0 <= u1 <= r * 0 <= v1 <= e * * At each iteration, we reduce either a or b by one bit, and * adjust u0, u1, v0 and v1 to maintain the invariants: * - if a is even, then a <- a/2 * - otherwise, if b is even, then b <- b/2 * - otherwise, if a > b, then a <- (a-b)/2 * - otherwise, if b > a, then b <- (b-a)/2 * Algorithm stops when a = b. At that point, the common value * is the GCD of e and r; it must be 1 (otherwise, the private * key or public exponent is not valid). The (u0,v0) or (u1,v1) * pairs are the solution we are looking for. * * Since either a or b is reduced by at least 1 bit at each * iteration, 62 iterations are enough to reach the end * condition. * * To maintain the invariants, we must compute the same operations * on the u* and v* values that we do on a and b: * - When a is divided by 2, u0 and v0 must be divided by 2. * - When b is divided by 2, u1 and v1 must be divided by 2. * - When b is subtracted from a, u1 and v1 are subtracted from * u0 and v0, respectively. * - When a is subtracted from b, u0 and v0 are subtracted from * u1 and v1, respectively. * * However, we want to keep the u* and v* values in their proper * ranges. The following remarks apply: * * - When a is divided by 2, then a is even. Therefore: * * * If r is odd, then u0 and v0 must have the same parity; * if they are both odd, then adding r to u0 and e to v0 * makes them both even, and the division by 2 brings them * back to the proper range. * * * If r is even, then u0 must be even; if v0 is odd, then * adding r to u0 and e to v0 makes them both even, and the * division by 2 brings them back to the proper range. * * Thus, all we need to do is to look at the parity of v0, * and add (r,e) to (u0,v0) when v0 is odd. In order to avoid * a 32-bit overflow, we can add ((r+1)/2,(e/2)+1) after the * division (r+1 does not overflow since r < e; and (e/2)+1 * is equal to (e+1)/2 since e is odd). * * - When we subtract b from a, three cases may occur: * * * u1 <= u0 and v1 <= v0: just do the subtractions * * * u1 > u0 and v1 > v0: compute: * (u0, v0) <- (u0 + r - u1, v0 + e - v1) * * * u1 <= u0 and v1 > v0: compute: * (u0, v0) <- (u0 + r - u1, v0 + e - v1) * * The fourth case (u1 > u0 and v1 <= v0) is not possible * because it would contradict "b < a" (which is the reason * why we subtract b from a). * * The tricky case is the third one: from the equations, it * seems that u0 may go out of range. However, the invariants * and ranges of other values imply that, in that case, the * new u0 does not actually exceed the range. * * We can thus handle the subtraction by adding (r,e) based * solely on the comparison between v0 and v1. */ a = e; b = r; u0 = 1; v0 = 0; u1 = r; v1 = e - 1; hr = (r + 1) >> 1; he = (e >> 1) + 1; for (i = 0; i < 62; i ++) { uint32_t oa, ob, agtb, bgta; uint32_t sab, sba, da, db; uint32_t ctl; oa = a & 1; /* 1 if a is odd */ ob = b & 1; /* 1 if b is odd */ agtb = GT(a, b); /* 1 if a > b */ bgta = GT(b, a); /* 1 if b > a */ sab = oa & ob & agtb; /* 1 if a <- a-b */ sba = oa & ob & bgta; /* 1 if b <- b-a */ /* a <- a-b, u0 <- u0-u1, v0 <- v0-v1 */ ctl = GT(v1, v0); a -= b & -sab; u0 -= (u1 - (r & -ctl)) & -sab; v0 -= (v1 - (e & -ctl)) & -sab; /* b <- b-a, u1 <- u1-u0 mod r, v1 <- v1-v0 mod e */ ctl = GT(v0, v1); b -= a & -sba; u1 -= (u0 - (r & -ctl)) & -sba; v1 -= (v0 - (e & -ctl)) & -sba; da = NOT(oa) | sab; /* 1 if a <- a/2 */ db = (oa & NOT(ob)) | sba; /* 1 if b <- b/2 */ /* a <- a/2, u0 <- u0/2, v0 <- v0/2 */ ctl = v0 & 1; a ^= (a ^ (a >> 1)) & -da; u0 ^= (u0 ^ ((u0 >> 1) + (hr & -ctl))) & -da; v0 ^= (v0 ^ ((v0 >> 1) + (he & -ctl))) & -da; /* b <- b/2, u1 <- u1/2 mod r, v1 <- v1/2 mod e */ ctl = v1 & 1; b ^= (b ^ (b >> 1)) & -db; u1 ^= (u1 ^ ((u1 >> 1) + (hr & -ctl))) & -db; v1 ^= (v1 ^ ((v1 >> 1) + (he & -ctl))) & -db; } /* * Check that the GCD is indeed 1. If not, then the key is invalid * (and there's no harm in leaking that piece of information). */ if (a != 1) { return 0; } /* * Now we have u0*e - v0*r = 1. Let's compute the result as: * d = u0 + v0*k * We still have k in the tmp[] array, and its announced bit * length is that of phi. */ m = k + 1 + len; m[0] = (2 << 4) + 2; /* bit length is 32 bits, encoded */ m[1] = v0 & 0x7FFF; m[2] = (v0 >> 15) & 0x7FFF; m[3] = v0 >> 30; z = m + 4; br_i15_zero(z, k[0]); z[1] = u0 & 0x7FFF; z[2] = (u0 >> 15) & 0x7FFF; z[3] = u0 >> 30; br_i15_mulacc(z, k, m); /* * Encode the result. */ br_i15_encode(d, dlen, z); return dlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i15_pss_sign(const br_prng_class **rng, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pss_sig_pad(rng, hf_data, hf_mgf1, hash, salt_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i15_private(x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i15_pss_vrfy(const unsigned char *x, size_t xlen, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const void *hash, size_t salt_len, const br_rsa_public_key *pk) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i15_public(sig, xlen, pk)) { return 0; } return br_rsa_pss_sig_unpad(hf_data, hf_mgf1, (const unsigned char*)hash, salt_len, pk, sig); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * As a strict minimum, we need four buffers that can hold a * modular integer. */ #define _src_rsa_rsa_i15_pub_cTLEN (4 * (2 + ((BR_MAX_RSA_SIZE + 14) / 15))) /* see bearssl_rsa.h */ uint32_t br_rsa_i15_public(unsigned char *x, size_t xlen, const br_rsa_public_key *pk) { const unsigned char *n; size_t nlen; uint16_t tmp[1 + _src_rsa_rsa_i15_pub_cTLEN]; uint16_t *m, *a, *t; size_t fwlen; long z; uint16_t m0i; uint32_t r; /* * Get the actual length of the modulus, and see if it fits within * our stack buffer. We also check that the length of x[] is valid. */ n = pk->n; nlen = pk->nlen; while (nlen > 0 && *n == 0) { n ++; nlen --; } if (nlen == 0 || nlen > (BR_MAX_RSA_SIZE >> 3) || xlen != nlen) { return 0; } z = (long)nlen << 3; fwlen = 1; while (z > 0) { z -= 15; fwlen ++; } /* * Round up length to an even number. */ fwlen += (fwlen & 1); /* * The modulus gets decoded into m[]. * The value to exponentiate goes into a[]. * The temporaries for modular exponentiations are in t[]. * * We want the first value word of each integer to be aligned * on a 32-bit boundary. */ m = tmp; if (((uintptr_t)m & 2) == 0) { m ++; } a = m + fwlen; t = m + 2 * fwlen; /* * Decode the modulus. */ br_i15_decode(m, n, nlen); m0i = br_i15_ninv15(m[1]); /* * Note: if m[] is even, then m0i == 0. Otherwise, m0i must be * an odd integer. */ r = m0i & 1; /* * Decode x[] into a[]; we also check that its value is proper. */ r &= br_i15_decode_mod(a, x, xlen, m); /* * Compute the modular exponentiation. */ br_i15_modpow_opt(a, pk->e, pk->elen, m, m0i, t, _src_rsa_rsa_i15_pub_cTLEN - 2 * fwlen); /* * Encode the result. */ br_i15_encode(x, xlen, a); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Recompute public exponent, based on factor p and reduced private * exponent dp. */ static uint32_t _src_rsa_rsa_i15_pubexp_cget_pubexp(const unsigned char *pbuf, size_t plen, const unsigned char *dpbuf, size_t dplen) { /* * dp is the inverse of e modulo p-1. If p = 3 mod 4, then * p-1 = 2*((p-1)/2). Taken modulo 2, e is odd and has inverse 1; * thus, dp must be odd. * * We compute the inverse of dp modulo (p-1)/2. This requires * first reducing dp modulo (p-1)/2 (this can be done with a * conditional subtract, no need to use the generic modular * reduction function); then, we use moddiv. */ uint16_t tmp[6 * ((BR_MAX_RSA_FACTOR + 29) / 15)]; uint16_t *p, *dp, *x; size_t len; uint32_t e; /* * Compute actual factor length (in bytes) and check that it fits * under our size constraints. */ while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } if (plen == 0 || plen < 5 || plen > (BR_MAX_RSA_FACTOR / 8)) { return 0; } /* * Compute actual reduced exponent length (in bytes) and check that * it is not longer than p. */ while (dplen > 0 && *dpbuf == 0) { dpbuf ++; dplen --; } if (dplen > plen || dplen == 0 || (dplen == plen && dpbuf[0] > pbuf[0])) { return 0; } /* * Verify that p = 3 mod 4 and that dp is odd. */ if ((pbuf[plen - 1] & 3) != 3 || (dpbuf[dplen - 1] & 1) != 1) { return 0; } /* * Decode p and compute (p-1)/2. */ p = tmp; br_i15_decode(p, pbuf, plen); len = (p[0] + 31) >> 4; br_i15_rshift(p, 1); /* * Decode dp and make sure its announced bit length matches that of * p (we already know that the size of dp, in bits, does not exceed * the size of p, so we just have to copy the header word). */ dp = p + len; memset(dp, 0, len * sizeof *dp); br_i15_decode(dp, dpbuf, dplen); dp[0] = p[0]; /* * Subtract (p-1)/2 from dp if necessary. */ br_i15_sub(dp, p, NOT(br_i15_sub(dp, p, 0))); /* * If another subtraction is needed, then this means that the * value was invalid. We don't care to leak information about * invalid keys. */ if (br_i15_sub(dp, p, 0) == 0) { return 0; } /* * Invert dp modulo (p-1)/2. If the inversion fails, then the * key value was invalid. */ x = dp + len; br_i15_zero(x, p[0]); x[1] = 1; if (br_i15_moddiv(x, dp, p, br_i15_ninv15(p[1]), x + len) == 0) { return 0; } /* * We now have an inverse. We must set it to zero (error) if its * length is greater than 32 bits and/or if it is an even integer. * Take care that the bit_length function returns an encoded * bit length. */ e = (uint32_t)x[1] | ((uint32_t)x[2] << 15) | ((uint32_t)x[3] << 30); e &= -LT(br_i15_bit_length(x + 1, len - 1), 35); e &= -(e & 1); return e; } /* see bearssl_rsa.h */ uint32_t br_rsa_i15_compute_pubexp(const br_rsa_private_key *sk) { /* * Get the public exponent from both p and q. This is the right * exponent if we get twice the same value. */ uint32_t ep, eq; ep = _src_rsa_rsa_i15_pubexp_cget_pubexp(sk->p, sk->plen, sk->dp, sk->dplen); eq = _src_rsa_rsa_i15_pubexp_cget_pubexp(sk->q, sk->qlen, sk->dq, sk->dqlen); return ep & -EQ(ep, eq); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_keygen(const br_prng_class **rng, br_rsa_private_key *sk, void *kbuf_priv, br_rsa_public_key *pk, void *kbuf_pub, unsigned size, uint32_t pubexp) { return br_rsa_i31_keygen_inner(rng, sk, kbuf_priv, pk, kbuf_pub, size, pubexp, &br_i31_modpow_opt); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Make a random integer of the provided size. The size is encoded. * The header word is untouched. */ static void _src_rsa_rsa_i31_keygen_inner_cmkrand(const br_prng_class **rng, uint32_t *x, uint32_t esize) { size_t u, len; unsigned m; len = (esize + 31) >> 5; (*rng)->generate(rng, x + 1, len * sizeof(uint32_t)); for (u = 1; u < len; u ++) { x[u] &= 0x7FFFFFFF; } m = esize & 31; if (m == 0) { x[len] &= 0x7FFFFFFF; } else { x[len] &= 0x7FFFFFFF >> (31 - m); } } /* * This is the big-endian unsigned representation of the product of * all small primes from 13 to 1481. */ static const unsigned char _src_rsa_rsa_i31_keygen_inner_cSMALL_PRIMES[] = { 0x2E, 0xAB, 0x92, 0xD1, 0x8B, 0x12, 0x47, 0x31, 0x54, 0x0A, 0x99, 0x5D, 0x25, 0x5E, 0xE2, 0x14, 0x96, 0x29, 0x1E, 0xB7, 0x78, 0x70, 0xCC, 0x1F, 0xA5, 0xAB, 0x8D, 0x72, 0x11, 0x37, 0xFB, 0xD8, 0x1E, 0x3F, 0x5B, 0x34, 0x30, 0x17, 0x8B, 0xE5, 0x26, 0x28, 0x23, 0xA1, 0x8A, 0xA4, 0x29, 0xEA, 0xFD, 0x9E, 0x39, 0x60, 0x8A, 0xF3, 0xB5, 0xA6, 0xEB, 0x3F, 0x02, 0xB6, 0x16, 0xC3, 0x96, 0x9D, 0x38, 0xB0, 0x7D, 0x82, 0x87, 0x0C, 0xF7, 0xBE, 0x24, 0xE5, 0x5F, 0x41, 0x04, 0x79, 0x76, 0x40, 0xE7, 0x00, 0x22, 0x7E, 0xB5, 0x85, 0x7F, 0x8D, 0x01, 0x50, 0xE9, 0xD3, 0x29, 0x42, 0x08, 0xB3, 0x51, 0x40, 0x7B, 0xD7, 0x8D, 0xCC, 0x10, 0x01, 0x64, 0x59, 0x28, 0xB6, 0x53, 0xF3, 0x50, 0x4E, 0xB1, 0xF2, 0x58, 0xCD, 0x6E, 0xF5, 0x56, 0x3E, 0x66, 0x2F, 0xD7, 0x07, 0x7F, 0x52, 0x4C, 0x13, 0x24, 0xDC, 0x8E, 0x8D, 0xCC, 0xED, 0x77, 0xC4, 0x21, 0xD2, 0xFD, 0x08, 0xEA, 0xD7, 0xC0, 0x5C, 0x13, 0x82, 0x81, 0x31, 0x2F, 0x2B, 0x08, 0xE4, 0x80, 0x04, 0x7A, 0x0C, 0x8A, 0x3C, 0xDC, 0x22, 0xE4, 0x5A, 0x7A, 0xB0, 0x12, 0x5E, 0x4A, 0x76, 0x94, 0x77, 0xC2, 0x0E, 0x92, 0xBA, 0x8A, 0xA0, 0x1F, 0x14, 0x51, 0x1E, 0x66, 0x6C, 0x38, 0x03, 0x6C, 0xC7, 0x4A, 0x4B, 0x70, 0x80, 0xAF, 0xCA, 0x84, 0x51, 0xD8, 0xD2, 0x26, 0x49, 0xF5, 0xA8, 0x5E, 0x35, 0x4B, 0xAC, 0xCE, 0x29, 0x92, 0x33, 0xB7, 0xA2, 0x69, 0x7D, 0x0C, 0xE0, 0x9C, 0xDB, 0x04, 0xD6, 0xB4, 0xBC, 0x39, 0xD7, 0x7F, 0x9E, 0x9D, 0x78, 0x38, 0x7F, 0x51, 0x54, 0x50, 0x8B, 0x9E, 0x9C, 0x03, 0x6C, 0xF5, 0x9D, 0x2C, 0x74, 0x57, 0xF0, 0x27, 0x2A, 0xC3, 0x47, 0xCA, 0xB9, 0xD7, 0x5C, 0xFF, 0xC2, 0xAC, 0x65, 0x4E, 0xBD }; /* * We need temporary values for at least 7 integers of the same size * as a factor (including header word); more space helps with performance * (in modular exponentiations), but we much prefer to remain under * 2 kilobytes in total, to save stack space. The macro _src_rsa_rsa_i31_keygen_inner_cTEMPS below * exceeds 512 (which is a count in 32-bit words) when BR_MAX_RSA_SIZE * is greater than 4464 (default value is 4096, so the 2-kB limit is * maintained unless BR_MAX_RSA_SIZE was modified). */ #define MAX(x, y) ((x) > (y) ? (x) : (y)) #define ROUND2(x) ((((x) + 1) >> 1) << 1) #define _src_rsa_rsa_i31_keygen_inner_cTEMPS MAX(512, ROUND2(7 * ((((BR_MAX_RSA_SIZE + 1) >> 1) + 61) / 31))) /* * Perform trial division on a candidate prime. This computes * y = _src_rsa_rsa_i31_keygen_inner_cSMALL_PRIMES mod x, then tries to compute y/y mod x. The * br_i31_moddiv() function will report an error if y is not invertible * modulo x. Returned value is 1 on success (none of the small primes * divides x), 0 on error (a non-trivial GCD is obtained). * * This function assumes that x is odd. */ static uint32_t _src_rsa_rsa_i31_keygen_inner_ctrial_divisions(const uint32_t *x, uint32_t *t) { uint32_t *y; uint32_t x0i; y = t; t += 1 + ((x[0] + 31) >> 5); x0i = br_i31_ninv31(x[1]); br_i31_decode_reduce(y, _src_rsa_rsa_i31_keygen_inner_cSMALL_PRIMES, sizeof _src_rsa_rsa_i31_keygen_inner_cSMALL_PRIMES, x); return br_i31_moddiv(y, y, x, x0i, t); } /* * Perform n rounds of Miller-Rabin on the candidate prime x. This * function assumes that x = 3 mod 4. * * Returned value is 1 on success (all rounds completed successfully), * 0 otherwise. */ static uint32_t _src_rsa_rsa_i31_keygen_inner_cmiller_rabin(const br_prng_class **rng, const uint32_t *x, int n, uint32_t *t, size_t tlen, br_i31_modpow_opt_type mp31) { /* * Since x = 3 mod 4, the Miller-Rabin test is simple: * - get a random base a (such that 1 < a < x-1) * - compute z = a^((x-1)/2) mod x * - if z != 1 and z != x-1, the number x is composite * * We generate bases 'a' randomly with a size which is * one bit less than x, which ensures that a < x-1. It * is not useful to verify that a > 1 because the probability * that we get a value a equal to 0 or 1 is much smaller * than the probability of our Miller-Rabin tests not to * detect a composite, which is already quite smaller than the * probability of the hardware misbehaving and return a * composite integer because of some glitch (e.g. bad RAM * or ill-timed cosmic ray). */ unsigned char *xm1d2; size_t xlen, xm1d2_len, xm1d2_len_u32, u; uint32_t asize; unsigned cc; uint32_t x0i; /* * Compute (x-1)/2 (encoded). */ xm1d2 = (unsigned char *)t; xm1d2_len = ((x[0] - (x[0] >> 5)) + 7) >> 3; br_i31_encode(xm1d2, xm1d2_len, x); cc = 0; for (u = 0; u < xm1d2_len; u ++) { unsigned w; w = xm1d2[u]; xm1d2[u] = (unsigned char)((w >> 1) | cc); cc = w << 7; } /* * We used some words of the provided buffer for (x-1)/2. */ xm1d2_len_u32 = (xm1d2_len + 3) >> 2; t += xm1d2_len_u32; tlen -= xm1d2_len_u32; xlen = (x[0] + 31) >> 5; asize = x[0] - 1 - EQ0(x[0] & 31); x0i = br_i31_ninv31(x[1]); while (n -- > 0) { uint32_t *a, *t2; uint32_t eq1, eqm1; size_t t2len; /* * Generate a random base. We don't need the base to be * really uniform modulo x, so we just get a random * number which is one bit shorter than x. */ a = t; a[0] = x[0]; a[xlen] = 0; _src_rsa_rsa_i31_keygen_inner_cmkrand(rng, a, asize); /* * Compute a^((x-1)/2) mod x. We assume here that the * function will not fail (the temporary array is large * enough). */ t2 = t + 1 + xlen; t2len = tlen - 1 - xlen; if ((t2len & 1) != 0) { /* * Since the source array is 64-bit aligned and * has an even number of elements (_src_rsa_rsa_i31_keygen_inner_cTEMPS), we * can use the parity of the remaining length to * detect and adjust alignment. */ t2 ++; t2len --; } mp31(a, xm1d2, xm1d2_len, x, x0i, t2, t2len); /* * We must obtain either 1 or x-1. Note that x is odd, * hence x-1 differs from x only in its low word (no * carry). */ eq1 = a[1] ^ 1; eqm1 = a[1] ^ (x[1] - 1); for (u = 2; u <= xlen; u ++) { eq1 |= a[u]; eqm1 |= a[u] ^ x[u]; } if ((EQ0(eq1) | EQ0(eqm1)) == 0) { return 0; } } return 1; } /* * Create a random prime of the provided size. 'size' is the _encoded_ * bit length. The two top bits and the two bottom bits are set to 1. */ static void _src_rsa_rsa_i31_keygen_inner_cmkprime(const br_prng_class **rng, uint32_t *x, uint32_t esize, uint32_t pubexp, uint32_t *t, size_t tlen, br_i31_modpow_opt_type mp31) { size_t len; x[0] = esize; len = (esize + 31) >> 5; for (;;) { size_t u; uint32_t m3, m5, m7, m11; int rounds, s7, s11; /* * Generate random bits. We force the two top bits and the * two bottom bits to 1. */ _src_rsa_rsa_i31_keygen_inner_cmkrand(rng, x, esize); if ((esize & 31) == 0) { x[len] |= 0x60000000; } else if ((esize & 31) == 1) { x[len] |= 0x00000001; x[len - 1] |= 0x40000000; } else { x[len] |= 0x00000003 << ((esize & 31) - 2); } x[1] |= 0x00000003; /* * Trial division with low primes (3, 5, 7 and 11). We * use the following properties: * * 2^2 = 1 mod 3 * 2^4 = 1 mod 5 * 2^3 = 1 mod 7 * 2^10 = 1 mod 11 */ m3 = 0; m5 = 0; m7 = 0; m11 = 0; s7 = 0; s11 = 0; for (u = 0; u < len; u ++) { uint32_t w, w3, w5, w7, w11; w = x[1 + u]; w3 = (w & 0xFFFF) + (w >> 16); /* max: 98302 */ w5 = (w & 0xFFFF) + (w >> 16); /* max: 98302 */ w7 = (w & 0x7FFF) + (w >> 15); /* max: 98302 */ w11 = (w & 0xFFFFF) + (w >> 20); /* max: 1050622 */ m3 += w3 << (u & 1); m3 = (m3 & 0xFF) + (m3 >> 8); /* max: 1025 */ m5 += w5 << ((4 - u) & 3); m5 = (m5 & 0xFFF) + (m5 >> 12); /* max: 4479 */ m7 += w7 << s7; m7 = (m7 & 0x1FF) + (m7 >> 9); /* max: 1280 */ if (++ s7 == 3) { s7 = 0; } m11 += w11 << s11; if (++ s11 == 10) { s11 = 0; } m11 = (m11 & 0x3FF) + (m11 >> 10); /* max: 526847 */ } m3 = (m3 & 0x3F) + (m3 >> 6); /* max: 78 */ m3 = (m3 & 0x0F) + (m3 >> 4); /* max: 18 */ m3 = ((m3 * 43) >> 5) & 3; m5 = (m5 & 0xFF) + (m5 >> 8); /* max: 271 */ m5 = (m5 & 0x0F) + (m5 >> 4); /* max: 31 */ m5 -= 20 & -GT(m5, 19); m5 -= 10 & -GT(m5, 9); m5 -= 5 & -GT(m5, 4); m7 = (m7 & 0x3F) + (m7 >> 6); /* max: 82 */ m7 = (m7 & 0x07) + (m7 >> 3); /* max: 16 */ m7 = ((m7 * 147) >> 7) & 7; /* * 2^5 = 32 = -1 mod 11. */ m11 = (m11 & 0x3FF) + (m11 >> 10); /* max: 1536 */ m11 = (m11 & 0x3FF) + (m11 >> 10); /* max: 1023 */ m11 = (m11 & 0x1F) + 33 - (m11 >> 5); /* max: 64 */ m11 -= 44 & -GT(m11, 43); m11 -= 22 & -GT(m11, 21); m11 -= 11 & -GT(m11, 10); /* * If any of these modulo is 0, then the candidate is * not prime. Also, if pubexp is 3, 5, 7 or 11, and the * corresponding modulus is 1, then the candidate must * be rejected, because we need e to be invertible * modulo p-1. We can use simple comparisons here * because they won't leak information on a candidate * that we keep, only on one that we reject (and is thus * not secret). */ if (m3 == 0 || m5 == 0 || m7 == 0 || m11 == 0) { continue; } if ((pubexp == 3 && m3 == 1) || (pubexp == 5 && m5 == 1) || (pubexp == 7 && m7 == 1) || (pubexp == 11 && m11 == 1)) { continue; } /* * More trial divisions. */ if (!_src_rsa_rsa_i31_keygen_inner_ctrial_divisions(x, t)) { continue; } /* * Miller-Rabin algorithm. Since we selected a random * integer, not a maliciously crafted integer, we can use * relatively few rounds to lower the risk of a false * positive (i.e. declaring prime a non-prime) under * 2^(-80). It is not useful to lower the probability much * below that, since that would be substantially below * the probability of the hardware misbehaving. Sufficient * numbers of rounds are extracted from the Handbook of * Applied Cryptography, note 4.49 (page 149). * * Since we work on the encoded size (esize), we need to * compare with encoded thresholds. */ if (esize < 309) { rounds = 12; } else if (esize < 464) { rounds = 9; } else if (esize < 670) { rounds = 6; } else if (esize < 877) { rounds = 4; } else if (esize < 1341) { rounds = 3; } else { rounds = 2; } if (_src_rsa_rsa_i31_keygen_inner_cmiller_rabin(rng, x, rounds, t, tlen, mp31)) { return; } } } /* * Let p be a prime (p > 2^33, p = 3 mod 4). Let m = (p-1)/2, provided * as parameter (with announced bit length equal to that of p). This * function computes d = 1/e mod p-1 (for an odd integer e). Returned * value is 1 on success, 0 on error (an error is reported if e is not * invertible modulo p-1). * * The temporary buffer (t) must have room for at least 4 integers of * the size of p. */ static uint32_t _src_rsa_rsa_i31_keygen_inner_cinvert_pubexp(uint32_t *d, const uint32_t *m, uint32_t e, uint32_t *t) { uint32_t *f; uint32_t r; f = t; t += 1 + ((m[0] + 31) >> 5); /* * Compute d = 1/e mod m. Since p = 3 mod 4, m is odd. */ br_i31_zero(d, m[0]); d[1] = 1; br_i31_zero(f, m[0]); f[1] = e & 0x7FFFFFFF; f[2] = e >> 31; r = br_i31_moddiv(d, f, m, br_i31_ninv31(m[1]), t); /* * We really want d = 1/e mod p-1, with p = 2m. By the CRT, * the result is either the d we got, or d + m. * * Let's write e*d = 1 + k*m, for some integer k. Integers e * and m are odd. If d is odd, then e*d is odd, which implies * that k must be even; in that case, e*d = 1 + (k/2)*2m, and * thus d is already fine. Conversely, if d is even, then k * is odd, and we must add m to d in order to get the correct * result. */ br_i31_add(d, m, (uint32_t)(1 - (d[1] & 1))); return r; } /* * Swap two buffers in RAM. They must be disjoint. */ static void _src_rsa_rsa_i31_keygen_inner_cbufswap(void *b1, void *b2, size_t len) { size_t u; unsigned char *buf1, *buf2; buf1 = (unsigned char*)b1; buf2 = (unsigned char*)b2; for (u = 0; u < len; u ++) { unsigned w; w = buf1[u]; buf1[u] = buf2[u]; buf2[u] = w; } } /* see inner.h */ uint32_t br_rsa_i31_keygen_inner(const br_prng_class **rng, br_rsa_private_key *sk, void *kbuf_priv, br_rsa_public_key *pk, void *kbuf_pub, unsigned size, uint32_t pubexp, br_i31_modpow_opt_type mp31) { uint32_t esize_p, esize_q; size_t plen, qlen, tlen; uint32_t *p, *q, *t; union { uint32_t t32[_src_rsa_rsa_i31_keygen_inner_cTEMPS]; uint64_t t64[_src_rsa_rsa_i31_keygen_inner_cTEMPS >> 1]; /* for 64-bit alignment */ } tmp; uint32_t r; if (size < BR_MIN_RSA_SIZE || size > BR_MAX_RSA_SIZE) { return 0; } if (pubexp == 0) { pubexp = 3; } else if (pubexp == 1 || (pubexp & 1) == 0) { return 0; } esize_p = (size + 1) >> 1; esize_q = size - esize_p; sk->n_bitlen = size; sk->p = (unsigned char*)kbuf_priv; sk->plen = (esize_p + 7) >> 3; sk->q = sk->p + sk->plen; sk->qlen = (esize_q + 7) >> 3; sk->dp = sk->q + sk->qlen; sk->dplen = sk->plen; sk->dq = sk->dp + sk->dplen; sk->dqlen = sk->qlen; sk->iq = sk->dq + sk->dqlen; sk->iqlen = sk->plen; if (pk != NULL) { pk->n = (unsigned char*)kbuf_pub; pk->nlen = (size + 7) >> 3; pk->e = pk->n + pk->nlen; pk->elen = 4; br_enc32be(pk->e, pubexp); while (*pk->e == 0) { pk->e ++; pk->elen --; } } /* * We now switch to encoded sizes. * * floor((x * 16913) / (2^19)) is equal to floor(x/31) for all * integers x from 0 to 34966; the intermediate product fits on * 30 bits, thus we can use MUL31(). */ esize_p += MUL31(esize_p, 16913) >> 19; esize_q += MUL31(esize_q, 16913) >> 19; plen = (esize_p + 31) >> 5; qlen = (esize_q + 31) >> 5; p = tmp.t32; q = p + 1 + plen; t = q + 1 + qlen; tlen = ((sizeof tmp.t32) / sizeof(uint32_t)) - (2 + plen + qlen); /* * When looking for primes p and q, we temporarily divide * candidates by 2, in order to compute the inverse of the * public exponent. */ for (;;) { _src_rsa_rsa_i31_keygen_inner_cmkprime(rng, p, esize_p, pubexp, t, tlen, mp31); br_i31_rshift(p, 1); if (_src_rsa_rsa_i31_keygen_inner_cinvert_pubexp(t, p, pubexp, t + 1 + plen)) { br_i31_add(p, p, 1); p[1] |= 1; br_i31_encode(sk->p, sk->plen, p); br_i31_encode(sk->dp, sk->dplen, t); break; } } for (;;) { _src_rsa_rsa_i31_keygen_inner_cmkprime(rng, q, esize_q, pubexp, t, tlen, mp31); br_i31_rshift(q, 1); if (_src_rsa_rsa_i31_keygen_inner_cinvert_pubexp(t, q, pubexp, t + 1 + qlen)) { br_i31_add(q, q, 1); q[1] |= 1; br_i31_encode(sk->q, sk->qlen, q); br_i31_encode(sk->dq, sk->dqlen, t); break; } } /* * If p and q have the same size, then it is possible that q > p * (when the target modulus size is odd, we generate p with a * greater bit length than q). If q > p, we want to swap p and q * (and also dp and dq) for two reasons: * - The final step below (inversion of q modulo p) is easier if * p > q. * - While BearSSL's RSA code is perfectly happy with RSA keys such * that p < q, some other implementations have restrictions and * require p > q. * * Note that we can do a simple non-constant-time swap here, * because the only information we leak here is that we insist on * returning p and q such that p > q, which is not a secret. */ if (esize_p == esize_q && br_i31_sub(p, q, 0) == 1) { _src_rsa_rsa_i31_keygen_inner_cbufswap(p, q, (1 + plen) * sizeof *p); _src_rsa_rsa_i31_keygen_inner_cbufswap(sk->p, sk->q, sk->plen); _src_rsa_rsa_i31_keygen_inner_cbufswap(sk->dp, sk->dq, sk->dplen); } /* * We have produced p, q, dp and dq. We can now compute iq = 1/d mod p. * * We ensured that p >= q, so this is just a matter of updating the * header word for q (and possibly adding an extra word). * * Theoretically, the call below may fail, in case we were * extraordinarily unlucky, and p = q. Another failure case is if * Miller-Rabin failed us _twice_, and p and q are non-prime and * have a factor is common. We report the error mostly because it * is cheap and we can, but in practice this never happens (or, at * least, it happens way less often than hardware glitches). */ q[0] = p[0]; if (plen > qlen) { q[plen] = 0; t ++; tlen --; } br_i31_zero(t, p[0]); t[1] = 1; r = br_i31_moddiv(t, q, p, br_i31_ninv31(p[1]), t + 1 + plen); br_i31_encode(sk->iq, sk->iqlen, t); /* * Compute the public modulus too, if required. */ if (pk != NULL) { br_i31_zero(t, p[0]); br_i31_mulacc(t, p, q); br_i31_encode(pk->n, pk->nlen, t); } return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i31_compute_modulus(void *n, const br_rsa_private_key *sk) { uint32_t tmp[4 * (((BR_MAX_RSA_SIZE / 2) + 30) / 31) + 5]; uint32_t *t, *p, *q; const unsigned char *pbuf, *qbuf; size_t nlen, plen, qlen, tlen; /* * Compute actual byte and lengths for p and q. */ pbuf = sk->p; plen = sk->plen; while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } qbuf = sk->q; qlen = sk->qlen; while (qlen > 0 && *qbuf == 0) { qbuf ++; qlen --; } t = tmp; tlen = (sizeof tmp) / (sizeof tmp[0]); /* * Decode p. */ if ((31 * tlen) < (plen << 3) + 31) { return 0; } br_i31_decode(t, pbuf, plen); p = t; plen = (p[0] + 63) >> 5; t += plen; tlen -= plen; /* * Decode q. */ if ((31 * tlen) < (qlen << 3) + 31) { return 0; } br_i31_decode(t, qbuf, qlen); q = t; qlen = (q[0] + 63) >> 5; t += qlen; tlen -= qlen; /* * Computation can proceed only if we have enough room for the * modulus. */ if (tlen < (plen + qlen + 1)) { return 0; } /* * Private key already contains the modulus bit length, from which * we can infer the output length. Even if n is NULL, we still had * to decode p and q to make sure that the product can be computed. */ nlen = (sk->n_bitlen + 7) >> 3; if (n != NULL) { br_i31_zero(t, p[0]); br_i31_mulacc(t, p, q); br_i31_encode(n, nlen, t); } return nlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_oaep_decrypt(const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_private_key *sk, void *data, size_t *len) { uint32_t r; if (*len != ((sk->n_bitlen + 7) >> 3)) { return 0; } r = br_rsa_i31_private((unsigned char*)data, sk); r &= br_rsa_oaep_unpad(dig, label, label_len, data, len); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i31_oaep_encrypt( const br_prng_class **rnd, const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_public_key *pk, void *dst, size_t dst_max_len, const void *src, size_t src_len) { size_t dlen; dlen = br_rsa_oaep_pad(rnd, dig, label, label_len, pk, dst, dst_max_len, src, src_len); if (dlen == 0) { return 0; } return dlen & -(size_t)br_rsa_i31_public((unsigned char*)dst, dlen, pk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_pkcs1_sign(const unsigned char *hash_oid, const unsigned char *hash, size_t hash_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pkcs1_sig_pad(hash_oid, hash, hash_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i31_private(x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_pkcs1_vrfy(const unsigned char *x, size_t xlen, const unsigned char *hash_oid, size_t hash_len, const br_rsa_public_key *pk, unsigned char *hash_out) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i31_public(sig, xlen, pk)) { return 0; } return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_rsa_rsa_i31_priv_cU (2 + ((BR_MAX_RSA_FACTOR + 30) / 31)) #define _src_rsa_rsa_i31_priv_cTLEN (8 * U) /* see bearssl_rsa.h */ uint32_t br_rsa_i31_private(unsigned char *x, const br_rsa_private_key *sk) { const unsigned char *p, *q; size_t plen, qlen; size_t fwlen; uint32_t p0i, q0i; size_t xlen, u; uint32_t tmp[1 + _src_rsa_rsa_i31_priv_cTLEN]; long z; uint32_t *mp, *mq, *s1, *s2, *t1, *t2, *t3; uint32_t r; /* * Compute the actual lengths of p and q, in bytes. * These lengths are not considered secret (we cannot really hide * them anyway in constant-time code). */ p = sk->p; plen = sk->plen; while (plen > 0 && *p == 0) { p ++; plen --; } q = sk->q; qlen = sk->qlen; while (qlen > 0 && *q == 0) { q ++; qlen --; } /* * Compute the maximum factor length, in words. */ z = (long)(plen > qlen ? plen : qlen) << 3; fwlen = 1; while (z > 0) { z -= 31; fwlen ++; } /* * Round up the word length to an even number. */ fwlen += (fwlen & 1); /* * We need to fit at least 6 values in the stack buffer. */ if (6 * fwlen > _src_rsa_rsa_i31_priv_cTLEN) { return 0; } /* * Compute modulus length (in bytes). */ xlen = (sk->n_bitlen + 7) >> 3; /* * Decode q. */ mq = tmp; br_i31_decode(mq, q, qlen); /* * Decode p. */ t1 = mq + fwlen; br_i31_decode(t1, p, plen); /* * Compute the modulus (product of the two factors), to compare * it with the source value. We use br_i31_mulacc(), since it's * already used later on. */ t2 = mq + 2 * fwlen; br_i31_zero(t2, mq[0]); br_i31_mulacc(t2, mq, t1); /* * We encode the modulus into bytes, to perform the comparison * with bytes. We know that the product length, in bytes, is * exactly xlen. * The comparison actually computes the carry when subtracting * the modulus from the source value; that carry must be 1 for * a value in the correct range. We keep it in r, which is our * accumulator for the error code. */ t3 = mq + 4 * fwlen; br_i31_encode(t3, xlen, t2); u = xlen; r = 0; while (u > 0) { uint32_t wn, wx; u --; wn = ((unsigned char *)t3)[u]; wx = x[u]; r = ((wx - (wn + r)) >> 8) & 1; } /* * Move the decoded p to another temporary buffer. */ mp = mq + 2 * fwlen; memmove(mp, t1, fwlen * sizeof *t1); /* * Compute s2 = x^dq mod q. */ q0i = br_i31_ninv31(mq[1]); s2 = mq + fwlen; br_i31_decode_reduce(s2, x, xlen, mq); r &= br_i31_modpow_opt(s2, sk->dq, sk->dqlen, mq, q0i, mq + 3 * fwlen, _src_rsa_rsa_i31_priv_cTLEN - 3 * fwlen); /* * Compute s1 = x^dp mod p. */ p0i = br_i31_ninv31(mp[1]); s1 = mq + 3 * fwlen; br_i31_decode_reduce(s1, x, xlen, mp); r &= br_i31_modpow_opt(s1, sk->dp, sk->dplen, mp, p0i, mq + 4 * fwlen, _src_rsa_rsa_i31_priv_cTLEN - 4 * fwlen); /* * Compute: * h = (s1 - s2)*(1/q) mod p * s1 is an integer modulo p, but s2 is modulo q. PKCS#1 is * unclear about whether p may be lower than q (some existing, * widely deployed implementations of RSA don't tolerate p < q), * but we want to support that occurrence, so we need to use the * reduction function. * * Since we use br_i31_decode_reduce() for iq (purportedly, the * inverse of q modulo p), we also tolerate improperly large * values for this parameter. */ t1 = mq + 4 * fwlen; t2 = mq + 5 * fwlen; br_i31_reduce(t2, s2, mp); br_i31_add(s1, mp, br_i31_sub(s1, t2, 1)); br_i31_to_monty(s1, mp); br_i31_decode_reduce(t1, sk->iq, sk->iqlen, mp); br_i31_montymul(t2, s1, t1, mp, p0i); /* * h is now in t2. We compute the final result: * s = s2 + q*h * All these operations are non-modular. * * We need mq, s2 and t2. We use the t3 buffer as destination. * The buffers mp, s1 and t1 are no longer needed, so we can * reuse them for t3. Moreover, the first step of the computation * is to copy s2 into t3, after which s2 is not needed. Right * now, mq is in slot 0, s2 is in slot 1, and t2 is in slot 5. * Therefore, we have ample room for t3 by simply using s2. */ t3 = s2; br_i31_mulacc(t3, mq, t2); /* * Encode the result. Since we already checked the value of xlen, * we can just use it right away. */ br_i31_encode(x, xlen, t3); /* * The only error conditions remaining at that point are invalid * values for p and q (even integers). */ return p0i & q0i & r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i31_compute_privexp(void *d, const br_rsa_private_key *sk, uint32_t e) { /* * We want to invert e modulo phi = (p-1)(q-1). This first * requires computing phi, which is easy since we have the factors * p and q in the private key structure. * * Since p = 3 mod 4 and q = 3 mod 4, phi/4 is an odd integer. * We could invert e modulo phi/4 then patch the result to * modulo phi, but this would involve assembling three modulus-wide * values (phi/4, 1 and e) and calling moddiv, that requires * three more temporaries, for a total of six big integers, or * slightly more than 3 kB of stack space for RSA-4096. This * exceeds our stack requirements. * * Instead, we first use one step of the extended GCD: * * - We compute phi = k*e + r (Euclidean division of phi by e). * If public exponent e is correct, then r != 0 (e must be * invertible modulo phi). We also have k != 0 since we * enforce non-ridiculously-small factors. * * - We find small u, v such that u*e - v*r = 1 (using a * binary GCD; we can arrange for u < r and v < e, i.e. all * values fit on 32 bits). * * - Solution is: d = u + v*k * This last computation is exact: since u < r and v < e, * the above implies d < r + e*((phi-r)/e) = phi */ uint32_t tmp[4 * ((BR_MAX_RSA_FACTOR + 30) / 31) + 12]; uint32_t *p, *q, *k, *m, *z, *phi; const unsigned char *pbuf, *qbuf; size_t plen, qlen, u, len, dlen; uint32_t r, a, b, u0, v0, u1, v1, he, hr; int i; /* * Check that e is correct. */ if (e < 3 || (e & 1) == 0) { return 0; } /* * Check lengths of p and q, and that they are both odd. */ pbuf = sk->p; plen = sk->plen; while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } if (plen < 5 || plen > (BR_MAX_RSA_FACTOR / 8) || (pbuf[plen - 1] & 1) != 1) { return 0; } qbuf = sk->q; qlen = sk->qlen; while (qlen > 0 && *qbuf == 0) { qbuf ++; qlen --; } if (qlen < 5 || qlen > (BR_MAX_RSA_FACTOR / 8) || (qbuf[qlen - 1] & 1) != 1) { return 0; } /* * Output length is that of the modulus. */ dlen = (sk->n_bitlen + 7) >> 3; if (d == NULL) { return dlen; } p = tmp; br_i31_decode(p, pbuf, plen); plen = (p[0] + 31) >> 5; q = p + 1 + plen; br_i31_decode(q, qbuf, qlen); qlen = (q[0] + 31) >> 5; /* * Compute phi = (p-1)*(q-1), then move it over p-1 and q-1 (that * we do not need anymore). The mulacc function sets the announced * bit length of t to be the sum of the announced bit lengths of * p-1 and q-1, which is usually exact but may overshoot by one 1 * bit in some cases; we readjust it to its true length. */ p[1] --; q[1] --; phi = q + 1 + qlen; br_i31_zero(phi, p[0]); br_i31_mulacc(phi, p, q); len = (phi[0] + 31) >> 5; memmove(tmp, phi, (1 + len) * sizeof *phi); phi = tmp; phi[0] = br_i31_bit_length(phi + 1, len); len = (phi[0] + 31) >> 5; /* * Divide phi by public exponent e. The final remainder r must be * non-zero (otherwise, the key is invalid). The quotient is k, * which we write over phi, since we don't need phi after that. */ r = 0; for (u = len; u >= 1; u --) { /* * Upon entry, r < e, and phi[u] < 2^31; hence, * hi:lo < e*2^31. Thus, the produced word k[u] * must be lower than 2^31, and the new remainder r * is lower than e. */ uint32_t hi, lo; hi = r >> 1; lo = (r << 31) + phi[u]; phi[u] = br_divrem(hi, lo, e, &r); } if (r == 0) { return 0; } k = phi; /* * Compute u and v such that u*e - v*r = GCD(e,r). We use * a binary GCD algorithm, with 6 extra integers a, b, * u0, u1, v0 and v1. Initial values are: * a = e u0 = 1 v0 = 0 * b = r u1 = r v1 = e-1 * The following invariants are maintained: * a = u0*e - v0*r * b = u1*e - v1*r * 0 < a <= e * 0 < b <= r * 0 <= u0 <= r * 0 <= v0 <= e * 0 <= u1 <= r * 0 <= v1 <= e * * At each iteration, we reduce either a or b by one bit, and * adjust u0, u1, v0 and v1 to maintain the invariants: * - if a is even, then a <- a/2 * - otherwise, if b is even, then b <- b/2 * - otherwise, if a > b, then a <- (a-b)/2 * - otherwise, if b > a, then b <- (b-a)/2 * Algorithm stops when a = b. At that point, the common value * is the GCD of e and r; it must be 1 (otherwise, the private * key or public exponent is not valid). The (u0,v0) or (u1,v1) * pairs are the solution we are looking for. * * Since either a or b is reduced by at least 1 bit at each * iteration, 62 iterations are enough to reach the end * condition. * * To maintain the invariants, we must compute the same operations * on the u* and v* values that we do on a and b: * - When a is divided by 2, u0 and v0 must be divided by 2. * - When b is divided by 2, u1 and v1 must be divided by 2. * - When b is subtracted from a, u1 and v1 are subtracted from * u0 and v0, respectively. * - When a is subtracted from b, u0 and v0 are subtracted from * u1 and v1, respectively. * * However, we want to keep the u* and v* values in their proper * ranges. The following remarks apply: * * - When a is divided by 2, then a is even. Therefore: * * * If r is odd, then u0 and v0 must have the same parity; * if they are both odd, then adding r to u0 and e to v0 * makes them both even, and the division by 2 brings them * back to the proper range. * * * If r is even, then u0 must be even; if v0 is odd, then * adding r to u0 and e to v0 makes them both even, and the * division by 2 brings them back to the proper range. * * Thus, all we need to do is to look at the parity of v0, * and add (r,e) to (u0,v0) when v0 is odd. In order to avoid * a 32-bit overflow, we can add ((r+1)/2,(e/2)+1) after the * division (r+1 does not overflow since r < e; and (e/2)+1 * is equal to (e+1)/2 since e is odd). * * - When we subtract b from a, three cases may occur: * * * u1 <= u0 and v1 <= v0: just do the subtractions * * * u1 > u0 and v1 > v0: compute: * (u0, v0) <- (u0 + r - u1, v0 + e - v1) * * * u1 <= u0 and v1 > v0: compute: * (u0, v0) <- (u0 + r - u1, v0 + e - v1) * * The fourth case (u1 > u0 and v1 <= v0) is not possible * because it would contradict "b < a" (which is the reason * why we subtract b from a). * * The tricky case is the third one: from the equations, it * seems that u0 may go out of range. However, the invariants * and ranges of other values imply that, in that case, the * new u0 does not actually exceed the range. * * We can thus handle the subtraction by adding (r,e) based * solely on the comparison between v0 and v1. */ a = e; b = r; u0 = 1; v0 = 0; u1 = r; v1 = e - 1; hr = (r + 1) >> 1; he = (e >> 1) + 1; for (i = 0; i < 62; i ++) { uint32_t oa, ob, agtb, bgta; uint32_t sab, sba, da, db; uint32_t ctl; oa = a & 1; /* 1 if a is odd */ ob = b & 1; /* 1 if b is odd */ agtb = GT(a, b); /* 1 if a > b */ bgta = GT(b, a); /* 1 if b > a */ sab = oa & ob & agtb; /* 1 if a <- a-b */ sba = oa & ob & bgta; /* 1 if b <- b-a */ /* a <- a-b, u0 <- u0-u1, v0 <- v0-v1 */ ctl = GT(v1, v0); a -= b & -sab; u0 -= (u1 - (r & -ctl)) & -sab; v0 -= (v1 - (e & -ctl)) & -sab; /* b <- b-a, u1 <- u1-u0 mod r, v1 <- v1-v0 mod e */ ctl = GT(v0, v1); b -= a & -sba; u1 -= (u0 - (r & -ctl)) & -sba; v1 -= (v0 - (e & -ctl)) & -sba; da = NOT(oa) | sab; /* 1 if a <- a/2 */ db = (oa & NOT(ob)) | sba; /* 1 if b <- b/2 */ /* a <- a/2, u0 <- u0/2, v0 <- v0/2 */ ctl = v0 & 1; a ^= (a ^ (a >> 1)) & -da; u0 ^= (u0 ^ ((u0 >> 1) + (hr & -ctl))) & -da; v0 ^= (v0 ^ ((v0 >> 1) + (he & -ctl))) & -da; /* b <- b/2, u1 <- u1/2 mod r, v1 <- v1/2 mod e */ ctl = v1 & 1; b ^= (b ^ (b >> 1)) & -db; u1 ^= (u1 ^ ((u1 >> 1) + (hr & -ctl))) & -db; v1 ^= (v1 ^ ((v1 >> 1) + (he & -ctl))) & -db; } /* * Check that the GCD is indeed 1. If not, then the key is invalid * (and there's no harm in leaking that piece of information). */ if (a != 1) { return 0; } /* * Now we have u0*e - v0*r = 1. Let's compute the result as: * d = u0 + v0*k * We still have k in the tmp[] array, and its announced bit * length is that of phi. */ m = k + 1 + len; m[0] = (1 << 5) + 1; /* bit length is 32 bits, encoded */ m[1] = v0 & 0x7FFFFFFF; m[2] = v0 >> 31; z = m + 3; br_i31_zero(z, k[0]); z[1] = u0 & 0x7FFFFFFF; z[2] = u0 >> 31; br_i31_mulacc(z, k, m); /* * Encode the result. */ br_i31_encode(d, dlen, z); return dlen; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_pss_sign(const br_prng_class **rng, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pss_sig_pad(rng, hf_data, hf_mgf1, hash, salt_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i31_private(x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i31_pss_vrfy(const unsigned char *x, size_t xlen, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const void *hash, size_t salt_len, const br_rsa_public_key *pk) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i31_public(sig, xlen, pk)) { return 0; } return br_rsa_pss_sig_unpad(hf_data, hf_mgf1, (const unsigned char*)hash, salt_len, pk, sig); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * As a strict minimum, we need four buffers that can hold a * modular integer. */ #define _src_rsa_rsa_i31_pub_cTLEN (4 * (2 + ((BR_MAX_RSA_SIZE + 30) / 31))) /* see bearssl_rsa.h */ uint32_t br_rsa_i31_public(unsigned char *x, size_t xlen, const br_rsa_public_key *pk) { const unsigned char *n; size_t nlen; uint32_t tmp[1 + _src_rsa_rsa_i31_pub_cTLEN]; uint32_t *m, *a, *t; size_t fwlen; long z; uint32_t m0i, r; /* * Get the actual length of the modulus, and see if it fits within * our stack buffer. We also check that the length of x[] is valid. */ n = pk->n; nlen = pk->nlen; while (nlen > 0 && *n == 0) { n ++; nlen --; } if (nlen == 0 || nlen > (BR_MAX_RSA_SIZE >> 3) || xlen != nlen) { return 0; } z = (long)nlen << 3; fwlen = 1; while (z > 0) { z -= 31; fwlen ++; } /* * Round up length to an even number. */ fwlen += (fwlen & 1); /* * The modulus gets decoded into m[]. * The value to exponentiate goes into a[]. * The temporaries for modular exponentiation are in t[]. */ m = tmp; a = m + fwlen; t = m + 2 * fwlen; /* * Decode the modulus. */ br_i31_decode(m, n, nlen); m0i = br_i31_ninv31(m[1]); /* * Note: if m[] is even, then m0i == 0. Otherwise, m0i must be * an odd integer. */ r = m0i & 1; /* * Decode x[] into a[]; we also check that its value is proper. */ r &= br_i31_decode_mod(a, x, xlen, m); /* * Compute the modular exponentiation. */ br_i31_modpow_opt(a, pk->e, pk->elen, m, m0i, t, _src_rsa_rsa_i31_pub_cTLEN - 2 * fwlen); /* * Encode the result. */ br_i31_encode(x, xlen, a); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Recompute public exponent, based on factor p and reduced private * exponent dp. */ static uint32_t _src_rsa_rsa_i31_pubexp_cget_pubexp(const unsigned char *pbuf, size_t plen, const unsigned char *dpbuf, size_t dplen) { /* * dp is the inverse of e modulo p-1. If p = 3 mod 4, then * p-1 = 2*((p-1)/2). Taken modulo 2, e is odd and has inverse 1; * thus, dp must be odd. * * We compute the inverse of dp modulo (p-1)/2. This requires * first reducing dp modulo (p-1)/2 (this can be done with a * conditional subtract, no need to use the generic modular * reduction function); then, we use moddiv. */ uint32_t tmp[6 * ((BR_MAX_RSA_FACTOR + 61) / 31)]; uint32_t *p, *dp, *x; size_t len; uint32_t e; /* * Compute actual factor length (in bytes) and check that it fits * under our size constraints. */ while (plen > 0 && *pbuf == 0) { pbuf ++; plen --; } if (plen == 0 || plen < 5 || plen > (BR_MAX_RSA_FACTOR / 8)) { return 0; } /* * Compute actual reduced exponent length (in bytes) and check that * it is not longer than p. */ while (dplen > 0 && *dpbuf == 0) { dpbuf ++; dplen --; } if (dplen > plen || dplen == 0 || (dplen == plen && dpbuf[0] > pbuf[0])) { return 0; } /* * Verify that p = 3 mod 4 and that dp is odd. */ if ((pbuf[plen - 1] & 3) != 3 || (dpbuf[dplen - 1] & 1) != 1) { return 0; } /* * Decode p and compute (p-1)/2. */ p = tmp; br_i31_decode(p, pbuf, plen); len = (p[0] + 63) >> 5; br_i31_rshift(p, 1); /* * Decode dp and make sure its announced bit length matches that of * p (we already know that the size of dp, in bits, does not exceed * the size of p, so we just have to copy the header word). */ dp = p + len; memset(dp, 0, len * sizeof *dp); br_i31_decode(dp, dpbuf, dplen); dp[0] = p[0]; /* * Subtract (p-1)/2 from dp if necessary. */ br_i31_sub(dp, p, NOT(br_i31_sub(dp, p, 0))); /* * If another subtraction is needed, then this means that the * value was invalid. We don't care to leak information about * invalid keys. */ if (br_i31_sub(dp, p, 0) == 0) { return 0; } /* * Invert dp modulo (p-1)/2. If the inversion fails, then the * key value was invalid. */ x = dp + len; br_i31_zero(x, p[0]); x[1] = 1; if (br_i31_moddiv(x, dp, p, br_i31_ninv31(p[1]), x + len) == 0) { return 0; } /* * We now have an inverse. We must set it to zero (error) if its * length is greater than 32 bits and/or if it is an even integer. * Take care that the bit_length function returns an encoded * bit length. */ e = (uint32_t)x[1] | ((uint32_t)x[2] << 31); e &= -LT(br_i31_bit_length(x + 1, len - 1), 34); e &= -(e & 1); return e; } /* see bearssl_rsa.h */ uint32_t br_rsa_i31_compute_pubexp(const br_rsa_private_key *sk) { /* * Get the public exponent from both p and q. This is the right * exponent if we get twice the same value. */ uint32_t ep, eq; ep = _src_rsa_rsa_i31_pubexp_cget_pubexp(sk->p, sk->plen, sk->dp, sk->dplen); eq = _src_rsa_rsa_i31_pubexp_cget_pubexp(sk->q, sk->qlen, sk->dq, sk->dqlen); return ep & -EQ(ep, eq); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_oaep_decrypt(const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_private_key *sk, void *data, size_t *len) { uint32_t r; if (*len != ((sk->n_bitlen + 7) >> 3)) { return 0; } r = br_rsa_i32_private((unsigned char*)data, sk); r &= br_rsa_oaep_unpad(dig, label, label_len, data, len); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ size_t br_rsa_i32_oaep_encrypt( const br_prng_class **rnd, const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_public_key *pk, void *dst, size_t dst_max_len, const void *src, size_t src_len) { size_t dlen; dlen = br_rsa_oaep_pad(rnd, dig, label, label_len, pk, dst, dst_max_len, src, src_len); if (dlen == 0) { return 0; } return dlen & -(size_t)br_rsa_i32_public((unsigned char*)dst, dlen, pk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_pkcs1_sign(const unsigned char *hash_oid, const unsigned char *hash, size_t hash_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pkcs1_sig_pad(hash_oid, hash, hash_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i32_private((unsigned char*)x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_pkcs1_vrfy(const unsigned char *x, size_t xlen, const unsigned char *hash_oid, size_t hash_len, const br_rsa_public_key *pk, unsigned char *hash_out) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i32_public((unsigned char*)sig, xlen, pk)) { return 0; } return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define _src_rsa_rsa_i32_priv_cU (1 + (BR_MAX_RSA_FACTOR >> 5)) /* see bearssl_rsa.h */ uint32_t br_rsa_i32_private(unsigned char *x, const br_rsa_private_key *sk) { const unsigned char *p, *q; size_t plen, qlen; uint32_t tmp[6 * U]; uint32_t *mp, *mq, *s1, *s2, *t1, *t2, *t3; uint32_t p0i, q0i; size_t xlen, u; uint32_t r; /* * All our temporary buffers are from the tmp[] array. * * The mp, mq, s1, s2, t1 and t2 buffers are large enough to * contain a RSA factor. The t3 buffer can contain a complete * RSA modulus. t3 shares its storage space with s2, s1 and t1, * in that order (this is important, see below). */ mq = tmp; mp = tmp + U; t2 = tmp + 2 * U; s2 = tmp + 3 * U; s1 = tmp + 4 * U; t1 = tmp + 5 * U; t3 = s2; /* * Compute the actual lengths (in bytes) of p and q, and check * that they fit within our stack buffers. */ p = sk->p; plen = sk->plen; while (plen > 0 && *p == 0) { p ++; plen --; } q = sk->q; qlen = sk->qlen; while (qlen > 0 && *q == 0) { q ++; qlen --; } if (plen > (BR_MAX_RSA_FACTOR >> 3) || qlen > (BR_MAX_RSA_FACTOR >> 3)) { return 0; } /* * Decode p and q. */ br_i32_decode(mp, p, plen); br_i32_decode(mq, q, qlen); /* * Recompute modulus, to compare with the source value. */ br_i32_zero(t2, mp[0]); br_i32_mulacc(t2, mp, mq); xlen = (sk->n_bitlen + 7) >> 3; br_i32_encode(t2 + 2 * U, xlen, t2); u = xlen; r = 0; while (u > 0) { uint32_t wn, wx; u --; wn = ((unsigned char *)(t2 + 2 * U))[u]; wx = x[u]; r = ((wx - (wn + r)) >> 8) & 1; } /* * Compute s1 = x^dp mod p. */ p0i = br_i32_ninv32(mp[1]); br_i32_decode_reduce(s1, x, xlen, mp); br_i32_modpow(s1, sk->dp, sk->dplen, mp, p0i, t1, t2); /* * Compute s2 = x^dq mod q. */ q0i = br_i32_ninv32(mq[1]); br_i32_decode_reduce(s2, x, xlen, mq); br_i32_modpow(s2, sk->dq, sk->dqlen, mq, q0i, t1, t2); /* * Compute: * h = (s1 - s2)*(1/q) mod p * s1 is an integer modulo p, but s2 is modulo q. PKCS#1 is * unclear about whether p may be lower than q (some existing, * widely deployed implementations of RSA don't tolerate p < q), * but we want to support that occurrence, so we need to use the * reduction function. * * Since we use br_i32_decode_reduce() for iq (purportedly, the * inverse of q modulo p), we also tolerate improperly large * values for this parameter. */ br_i32_reduce(t2, s2, mp); br_i32_add(s1, mp, br_i32_sub(s1, t2, 1)); br_i32_to_monty(s1, mp); br_i32_decode_reduce(t1, sk->iq, sk->iqlen, mp); br_i32_montymul(t2, s1, t1, mp, p0i); /* * h is now in t2. We compute the final result: * s = s2 + q*h * All these operations are non-modular. * * We need mq, s2 and t2. We use the t3 buffer as destination. * The buffers mp, s1 and t1 are no longer needed. Moreover, * the first step is to copy s2 into the destination buffer t3. * We thus arranged for t3 to actually share space with s2, and * to be followed by the space formerly used by s1 and t1. */ br_i32_mulacc(t3, mq, t2); /* * Encode the result. Since we already checked the value of xlen, * we can just use it right away. */ br_i32_encode(x, xlen, t3); /* * The only error conditions remaining at that point are invalid * values for p and q (even integers). */ return p0i & q0i & r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_pss_sign(const br_prng_class **rng, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pss_sig_pad(rng, hf_data, hf_mgf1, hash, salt_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i32_private((unsigned char*)x, sk); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_pss_vrfy(const unsigned char *x, size_t xlen, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const void *hash, size_t salt_len, const br_rsa_public_key *pk) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i32_public((unsigned char*)sig, xlen, pk)) { return 0; } return br_rsa_pss_sig_unpad(hf_data, hf_mgf1, (const unsigned char*)hash, salt_len, pk, sig); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_i32_public(unsigned char *x, size_t xlen, const br_rsa_public_key *pk) { const unsigned char *n; size_t nlen; uint32_t m[1 + (BR_MAX_RSA_SIZE >> 5)]; uint32_t a[1 + (BR_MAX_RSA_SIZE >> 5)]; uint32_t t1[1 + (BR_MAX_RSA_SIZE >> 5)]; uint32_t t2[1 + (BR_MAX_RSA_SIZE >> 5)]; uint32_t m0i, r; /* * Get the actual length of the modulus, and see if it fits within * our stack buffer. We also check that the length of x[] is valid. */ n = pk->n; nlen = pk->nlen; while (nlen > 0 && *n == 0) { n ++; nlen --; } if (nlen == 0 || nlen > (BR_MAX_RSA_SIZE >> 3) || xlen != nlen) { return 0; } br_i32_decode(m, n, nlen); m0i = br_i32_ninv32(m[1]); /* * Note: if m[] is even, then m0i == 0. Otherwise, m0i must be * an odd integer. */ r = m0i & 1; /* * Decode x[] into a[]; we also check that its value is proper. */ r &= br_i32_decode_mod(a, x, xlen, m); /* * Compute the modular exponentiation. */ br_i32_modpow(a, pk->e, pk->elen, m, m0i, t1, t2); /* * Encode the result. */ br_i32_encode(x, xlen, a); return r; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_keygen(const br_prng_class **rng, br_rsa_private_key *sk, void *kbuf_priv, br_rsa_public_key *pk, void *kbuf_pub, unsigned size, uint32_t pubexp) { return br_rsa_i31_keygen_inner(rng, sk, kbuf_priv, pk, kbuf_pub, size, pubexp, &br_i62_modpow_opt_as_i31); } /* see bearssl_rsa.h */ br_rsa_keygen br_rsa_i62_keygen_get(void) { return &br_rsa_i62_keygen; } #else /* see bearssl_rsa.h */ br_rsa_keygen br_rsa_i62_keygen_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_oaep_decrypt(const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_private_key *sk, void *data, size_t *len) { uint32_t r; if (*len != ((sk->n_bitlen + 7) >> 3)) { return 0; } r = br_rsa_i62_private((unsigned char*)data, sk); r &= br_rsa_oaep_unpad(dig, label, label_len, data, len); return r; } /* see bearssl_rsa.h */ br_rsa_oaep_decrypt br_rsa_i62_oaep_decrypt_get(void) { return &br_rsa_i62_oaep_decrypt; } #else /* see bearssl_rsa.h */ br_rsa_oaep_decrypt br_rsa_i62_oaep_decrypt_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ size_t br_rsa_i62_oaep_encrypt( const br_prng_class **rnd, const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_public_key *pk, void *dst, size_t dst_max_len, const void *src, size_t src_len) { size_t dlen; dlen = br_rsa_oaep_pad(rnd, dig, label, label_len, pk, dst, dst_max_len, src, src_len); if (dlen == 0) { return 0; } return dlen & -(size_t)br_rsa_i62_public((unsigned char*)dst, dlen, pk); } /* see bearssl_rsa.h */ br_rsa_oaep_encrypt br_rsa_i62_oaep_encrypt_get(void) { return &br_rsa_i62_oaep_encrypt; } #else /* see bearssl_rsa.h */ br_rsa_oaep_encrypt br_rsa_i62_oaep_encrypt_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_pkcs1_sign(const unsigned char *hash_oid, const unsigned char *hash, size_t hash_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pkcs1_sig_pad(hash_oid, hash, hash_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i62_private((unsigned char*)x, sk); } /* see bearssl_rsa.h */ br_rsa_pkcs1_sign br_rsa_i62_pkcs1_sign_get(void) { return &br_rsa_i62_pkcs1_sign; } #else /* see bearssl_rsa.h */ br_rsa_pkcs1_sign br_rsa_i62_pkcs1_sign_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_pkcs1_vrfy(const unsigned char *x, size_t xlen, const unsigned char *hash_oid, size_t hash_len, const br_rsa_public_key *pk, unsigned char *hash_out) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i62_public((unsigned char*)sig, xlen, pk)) { return 0; } return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out); } /* see bearssl_rsa.h */ br_rsa_pkcs1_vrfy br_rsa_i62_pkcs1_vrfy_get(void) { return &br_rsa_i62_pkcs1_vrfy; } #else /* see bearssl_rsa.h */ br_rsa_pkcs1_vrfy br_rsa_i62_pkcs1_vrfy_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #define _src_rsa_rsa_i62_priv_cU (2 + ((BR_MAX_RSA_FACTOR + 30) / 31)) #define _src_rsa_rsa_i62_priv_cTLEN (4 * U) /* _src_rsa_rsa_i62_priv_cTLEN is counted in 64-bit words */ /* see bearssl_rsa.h */ uint32_t br_rsa_i62_private(unsigned char *x, const br_rsa_private_key *sk) { const unsigned char *p, *q; size_t plen, qlen; size_t fwlen; uint32_t p0i, q0i; size_t xlen, u; uint64_t tmp[_src_rsa_rsa_i62_priv_cTLEN]; long z; uint32_t *mp, *mq, *s1, *s2, *t1, *t2, *t3; uint32_t r; /* * Compute the actual lengths of p and q, in bytes. * These lengths are not considered secret (we cannot really hide * them anyway in constant-time code). */ p = sk->p; plen = sk->plen; while (plen > 0 && *p == 0) { p ++; plen --; } q = sk->q; qlen = sk->qlen; while (qlen > 0 && *q == 0) { q ++; qlen --; } /* * Compute the maximum factor length, in words. */ z = (long)(plen > qlen ? plen : qlen) << 3; fwlen = 1; while (z > 0) { z -= 31; fwlen ++; } /* * Convert size to 62-bit words. */ fwlen = (fwlen + 1) >> 1; /* * We need to fit at least 6 values in the stack buffer. */ if (6 * fwlen > _src_rsa_rsa_i62_priv_cTLEN) { return 0; } /* * Compute signature length (in bytes). */ xlen = (sk->n_bitlen + 7) >> 3; /* * Decode q. */ mq = (uint32_t *)tmp; br_i31_decode(mq, q, qlen); /* * Decode p. */ t1 = (uint32_t *)(tmp + fwlen); br_i31_decode(t1, p, plen); /* * Compute the modulus (product of the two factors), to compare * it with the source value. We use br_i31_mulacc(), since it's * already used later on. */ t2 = (uint32_t *)(tmp + 2 * fwlen); br_i31_zero(t2, mq[0]); br_i31_mulacc(t2, mq, t1); /* * We encode the modulus into bytes, to perform the comparison * with bytes. We know that the product length, in bytes, is * exactly xlen. * The comparison actually computes the carry when subtracting * the modulus from the source value; that carry must be 1 for * a value in the correct range. We keep it in r, which is our * accumulator for the error code. */ t3 = (uint32_t *)(tmp + 4 * fwlen); br_i31_encode(t3, xlen, t2); u = xlen; r = 0; while (u > 0) { uint32_t wn, wx; u --; wn = ((unsigned char *)t3)[u]; wx = x[u]; r = ((wx - (wn + r)) >> 8) & 1; } /* * Move the decoded p to another temporary buffer. */ mp = (uint32_t *)(tmp + 2 * fwlen); memmove(mp, t1, 2 * fwlen * sizeof *t1); /* * Compute s2 = x^dq mod q. */ q0i = br_i31_ninv31(mq[1]); s2 = (uint32_t *)(tmp + fwlen); br_i31_decode_reduce(s2, x, xlen, mq); r &= br_i62_modpow_opt(s2, sk->dq, sk->dqlen, mq, q0i, tmp + 3 * fwlen, _src_rsa_rsa_i62_priv_cTLEN - 3 * fwlen); /* * Compute s1 = x^dp mod p. */ p0i = br_i31_ninv31(mp[1]); s1 = (uint32_t *)(tmp + 3 * fwlen); br_i31_decode_reduce(s1, x, xlen, mp); r &= br_i62_modpow_opt(s1, sk->dp, sk->dplen, mp, p0i, tmp + 4 * fwlen, _src_rsa_rsa_i62_priv_cTLEN - 4 * fwlen); /* * Compute: * h = (s1 - s2)*(1/q) mod p * s1 is an integer modulo p, but s2 is modulo q. PKCS#1 is * unclear about whether p may be lower than q (some existing, * widely deployed implementations of RSA don't tolerate p < q), * but we want to support that occurrence, so we need to use the * reduction function. * * Since we use br_i31_decode_reduce() for iq (purportedly, the * inverse of q modulo p), we also tolerate improperly large * values for this parameter. */ t1 = (uint32_t *)(tmp + 4 * fwlen); t2 = (uint32_t *)(tmp + 5 * fwlen); br_i31_reduce(t2, s2, mp); br_i31_add(s1, mp, br_i31_sub(s1, t2, 1)); br_i31_to_monty(s1, mp); br_i31_decode_reduce(t1, sk->iq, sk->iqlen, mp); br_i31_montymul(t2, s1, t1, mp, p0i); /* * h is now in t2. We compute the final result: * s = s2 + q*h * All these operations are non-modular. * * We need mq, s2 and t2. We use the t3 buffer as destination. * The buffers mp, s1 and t1 are no longer needed, so we can * reuse them for t3. Moreover, the first step of the computation * is to copy s2 into t3, after which s2 is not needed. Right * now, mq is in slot 0, s2 is in slot 1, and t2 is in slot 5. * Therefore, we have ample room for t3 by simply using s2. */ t3 = s2; br_i31_mulacc(t3, mq, t2); /* * Encode the result. Since we already checked the value of xlen, * we can just use it right away. */ br_i31_encode(x, xlen, t3); /* * The only error conditions remaining at that point are invalid * values for p and q (even integers). */ return p0i & q0i & r; } /* see bearssl_rsa.h */ br_rsa_private br_rsa_i62_private_get(void) { return &br_rsa_i62_private; } #else /* see bearssl_rsa.h */ br_rsa_private br_rsa_i62_private_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_pss_sign(const br_prng_class **rng, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, const br_rsa_private_key *sk, unsigned char *x) { if (!br_rsa_pss_sig_pad(rng, hf_data, hf_mgf1, hash, salt_len, sk->n_bitlen, x)) { return 0; } return br_rsa_i62_private((unsigned char*)x, sk); } /* see bearssl_rsa.h */ br_rsa_pss_sign br_rsa_i62_pss_sign_get(void) { return &br_rsa_i62_pss_sign; } #else /* see bearssl_rsa.h */ br_rsa_pss_sign br_rsa_i62_pss_sign_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* see bearssl_rsa.h */ uint32_t br_rsa_i62_pss_vrfy(const unsigned char *x, size_t xlen, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const void *hash, size_t salt_len, const br_rsa_public_key *pk) { unsigned char sig[BR_MAX_RSA_SIZE >> 3]; if (xlen > (sizeof sig)) { return 0; } memcpy(sig, x, xlen); if (!br_rsa_i62_public((unsigned char*)sig, xlen, pk)) { return 0; } return br_rsa_pss_sig_unpad(hf_data, hf_mgf1, (const unsigned char*)hash, salt_len, pk, sig); } /* see bearssl_rsa.h */ br_rsa_pss_vrfy br_rsa_i62_pss_vrfy_get(void) { return &br_rsa_i62_pss_vrfy; } #else /* see bearssl_rsa.h */ br_rsa_pss_vrfy br_rsa_i62_pss_vrfy_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 /* * As a strict minimum, we need four buffers that can hold a * modular integer. But _src_rsa_rsa_i62_pub_cTLEN is expressed in 64-bit words. */ #define _src_rsa_rsa_i62_pub_cTLEN (2 * (2 + ((BR_MAX_RSA_SIZE + 30) / 31))) /* see bearssl_rsa.h */ uint32_t br_rsa_i62_public(unsigned char *x, size_t xlen, const br_rsa_public_key *pk) { const unsigned char *n; size_t nlen; uint64_t tmp[_src_rsa_rsa_i62_pub_cTLEN]; uint32_t *m, *a; size_t fwlen; long z; uint32_t m0i, r; /* * Get the actual length of the modulus, and see if it fits within * our stack buffer. We also check that the length of x[] is valid. */ n = pk->n; nlen = pk->nlen; while (nlen > 0 && *n == 0) { n ++; nlen --; } if (nlen == 0 || nlen > (BR_MAX_RSA_SIZE >> 3) || xlen != nlen) { return 0; } z = (long)nlen << 3; fwlen = 1; while (z > 0) { z -= 31; fwlen ++; } /* * Convert fwlen to a count in 62-bit words. */ fwlen = (fwlen + 1) >> 1; /* * The modulus gets decoded into m[]. * The value to exponentiate goes into a[]. */ m = (uint32_t *)tmp; a = (uint32_t *)(tmp + fwlen); /* * Decode the modulus. */ br_i31_decode(m, n, nlen); m0i = br_i31_ninv31(m[1]); /* * Note: if m[] is even, then m0i == 0. Otherwise, m0i must be * an odd integer. */ r = m0i & 1; /* * Decode x[] into a[]; we also check that its value is proper. */ r &= br_i31_decode_mod(a, x, xlen, m); /* * Compute the modular exponentiation. */ br_i62_modpow_opt(a, pk->e, pk->elen, m, m0i, tmp + 2 * fwlen, _src_rsa_rsa_i62_pub_cTLEN - 2 * fwlen); /* * Encode the result. */ br_i31_encode(x, xlen, a); return r; } /* see bearssl_rsa.h */ br_rsa_public br_rsa_i62_public_get(void) { return &br_rsa_i62_public; } #else /* see bearssl_rsa.h */ br_rsa_public br_rsa_i62_public_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Hash some data. This is put as a separate function so that stack * allocation of the hash function context is done only for the duration * of the hash. */ static void _src_rsa_rsa_oaep_pad_chash_data(const br_hash_class *dig, void *dst, const void *src, size_t len) { br_hash_compat_context hc; hc.vtable = dig; dig->init(&hc.vtable); dig->update(&hc.vtable, src, len); dig->out(&hc.vtable, dst); } /* see inner.h */ size_t br_rsa_oaep_pad(const br_prng_class **rnd, const br_hash_class *dig, const void *label, size_t label_len, const br_rsa_public_key *pk, void *dst, size_t dst_max_len, const void *src, size_t src_len) { size_t k, hlen; unsigned char *buf; hlen = br_digest_size(dig); /* * Compute actual modulus length (in bytes). */ k = pk->nlen; while (k > 0 && pk->n[k - 1] == 0) { k --; } /* * An error is reported if: * - the modulus is too short; * - the source message length is too long; * - the destination buffer is too short. */ if (k < ((hlen << 1) + 2) || src_len > (k - (hlen << 1) - 2) || dst_max_len < k) { return 0; } /* * Apply padding. At this point, things cannot fail. */ buf = (unsigned char*)dst; /* * Assemble: DB = lHash || PS || 0x01 || M * We first place the source message M with memmove(), so that * overlaps between source and destination buffers are supported. */ memmove(buf + k - src_len, src, src_len); _src_rsa_rsa_oaep_pad_chash_data(dig, buf + 1 + hlen, label, label_len); memset(buf + 1 + (hlen << 1), 0, k - src_len - (hlen << 1) - 2); buf[k - src_len - 1] = 0x01; /* * Make the random seed. */ (*rnd)->generate(rnd, buf + 1, hlen); /* * Mask DB with the mask generated from the seed. */ br_mgf1_xor(buf + 1 + hlen, k - hlen - 1, dig, buf + 1, hlen); /* * Mask the seed with the mask generated from the masked DB. */ br_mgf1_xor(buf + 1, hlen, dig, buf + 1 + hlen, k - hlen - 1); /* * Padding result: EM = 0x00 || maskedSeed || maskedDB. */ buf[0] = 0x00; return k; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Hash some data and XOR the result into the provided buffer. This is put * as a separate function so that stack allocation of the hash function * context is done only for the duration of the hash. */ static void xor__src_rsa_rsa_oaep_unpad_chash_data(const br_hash_class *dig, void *dst, const void *src, size_t len) { br_hash_compat_context hc; unsigned char tmp[64]; unsigned char *buf; size_t u, hlen; hc.vtable = dig; dig->init(&hc.vtable); dig->update(&hc.vtable, src, len); dig->out(&hc.vtable, tmp); buf = (unsigned char*)dst; hlen = br_digest_size(dig); for (u = 0; u < hlen; u ++) { buf[u] ^= tmp[u]; } } /* see inner.h */ uint32_t br_rsa_oaep_unpad(const br_hash_class *dig, const void *label, size_t label_len, void *data, size_t *len) { size_t u, k, hlen; unsigned char *buf; uint32_t r, s, zlen; hlen = br_digest_size(dig); k = *len; buf = (unsigned char*)data; /* * There must be room for the padding. */ if (k < ((hlen << 1) + 2)) { return 0; } /* * Unmask the seed, then the DB value. */ br_mgf1_xor(buf + 1, hlen, dig, buf + 1 + hlen, k - hlen - 1); br_mgf1_xor(buf + 1 + hlen, k - hlen - 1, dig, buf + 1, hlen); /* * Hash the label and XOR it with the value in the array; if * they are equal then these should yield only zeros. */ xor__src_rsa_rsa_oaep_unpad_chash_data(dig, buf + 1 + hlen, label, label_len); /* * At that point, if the padding was correct, when we should * have: 0x00 || seed || 0x00 ... 0x00 0x01 || M * Padding is valid as long as: * - There is at least hlen+1 leading bytes of value 0x00. * - There is at least one non-zero byte. * - The first (leftmost) non-zero byte has value 0x01. * * Ultimately, we may leak the resulting message length, i.e. * the position of the byte of value 0x01, but we must take care * to do so only if the number of zero bytes has been verified * to be at least hlen+1. * * The loop below counts the number of bytes of value 0x00, and * checks that the next byte has value 0x01, in constant-time. * * - If the initial byte (before the seed) is not 0x00, then * r and s are set to 0, and stay there. * - Value r is 1 until the first non-zero byte is reached * (after the seed); it switches to 0 at that point. * - Value s is set to 1 if and only if the data encountered * at the time of the transition of r from 1 to 0 has value * exactly 0x01. * - Value zlen counts the number of leading bytes of value zero * (after the seed). */ r = 1 - ((buf[0] + 0xFF) >> 8); s = 0; zlen = 0; for (u = hlen + 1; u < k; u ++) { uint32_t w, nz; w = buf[u]; /* * nz == 1 only for the first non-zero byte. */ nz = r & ((w + 0xFF) >> 8); s |= nz & EQ(w, 0x01); r &= NOT(nz); zlen += r; } /* * Padding is correct only if s == 1, _and_ zlen >= hlen. */ s &= GE(zlen, (uint32_t)hlen); /* * At that point, padding was verified, and we are now allowed * to make conditional jumps. */ if (s) { size_t plen; plen = 2 + hlen + zlen; k -= plen; memmove(buf, buf + plen, k); *len = k; } return s; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_rsa_pkcs1_sig_pad(const unsigned char *hash_oid, const unsigned char *hash, size_t hash_len, uint32_t n_bitlen, unsigned char *x) { size_t u, x3, xlen; /* * Padded hash value has format: * 00 01 FF .. FF 00 30 x1 30 x2 06 x3 OID 05 00 04 x4 HASH * * with the following rules: * * -- Total length is equal to the modulus length (unsigned * encoding). * * -- There must be at least eight bytes of value 0xFF. * * -- x4 is equal to the hash length (hash_len). * * -- x3 is equal to the encoded OID value length (hash_oid[0]). * * -- x2 = x3 + 4. * * -- x1 = x2 + x4 + 4 = x3 + x4 + 8. * * Note: the "05 00" is optional (signatures with and without * that sequence exist in practice), but notes in PKCS#1 seem to * indicate that the presence of that sequence (specifically, * an ASN.1 NULL value for the hash parameters) may be slightly * more "standard" than the opposite. */ xlen = (n_bitlen + 7) >> 3; if (hash_oid == NULL) { if (xlen < hash_len + 11) { return 0; } x[0] = 0x00; x[1] = 0x01; u = xlen - hash_len; memset(x + 2, 0xFF, u - 3); x[u - 1] = 0x00; } else { x3 = hash_oid[0]; /* * Check that there is enough room for all the elements, * including at least eight bytes of value 0xFF. */ if (xlen < (x3 + hash_len + 21)) { return 0; } x[0] = 0x00; x[1] = 0x01; u = xlen - x3 - hash_len - 11; memset(x + 2, 0xFF, u - 2); x[u] = 0x00; x[u + 1] = 0x30; x[u + 2] = x3 + hash_len + 8; x[u + 3] = 0x30; x[u + 4] = x3 + 4; x[u + 5] = 0x06; memcpy(x + u + 6, hash_oid, x3 + 1); u += x3 + 7; x[u ++] = 0x05; x[u ++] = 0x00; x[u ++] = 0x04; x[u ++] = hash_len; } memcpy(x + u, hash, hash_len); return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_pkcs1_sig_unpad(const unsigned char *sig, size_t sig_len, const unsigned char *hash_oid, size_t hash_len, unsigned char *hash_out) { static const unsigned char pad1[] = { 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; unsigned char pad2[43]; size_t u, x2, x3, pad_len, zlen; if (sig_len < 11) { return 0; } /* * Expected format: * 00 01 FF ... FF 00 30 x1 30 x2 06 x3 OID [ 05 00 ] 04 x4 HASH * * with the following rules: * * -- Total length is that of the modulus and the signature * (this was already verified by br_rsa_i31_public()). * * -- There are at least eight bytes of value 0xFF. * * -- x4 is equal to the hash length (hash_len). * * -- x3 is equal to the encoded OID value length (so x3 is the * first byte of hash_oid[]). * * -- If the "05 00" is present, then x2 == x3 + 4; otherwise, * x2 == x3 + 2. * * -- x1 == x2 + x4 + 4. * * So the total length after the last "FF" is either x3 + x4 + 11 * (with the "05 00") or x3 + x4 + 9 (without the "05 00"). */ /* * Check the "00 01 FF .. FF 00" with at least eight 0xFF bytes. * The comparison is valid because we made sure that the signature * is at least 11 bytes long. */ if (memcmp(sig, pad1, sizeof pad1) != 0) { return 0; } for (u = sizeof pad1; u < sig_len; u ++) { if (sig[u] != 0xFF) { break; } } /* * Remaining length is sig_len - u bytes (including the 00 just * after the last FF). This must be equal to one of the two * possible values (depending on whether the "05 00" sequence is * present or not). */ if (hash_oid == NULL) { if (sig_len - u != hash_len + 1 || sig[u] != 0x00) { return 0; } } else { x3 = hash_oid[0]; pad_len = x3 + 9; memset(pad2, 0, pad_len); zlen = sig_len - u - hash_len; if (zlen == pad_len) { x2 = x3 + 2; } else if (zlen == pad_len + 2) { x2 = x3 + 4; pad_len = zlen; pad2[pad_len - 4] = 0x05; } else { return 0; } pad2[1] = 0x30; pad2[2] = x2 + hash_len + 4; pad2[3] = 0x30; pad2[4] = x2; pad2[5] = 0x06; memcpy(pad2 + 6, hash_oid, x3 + 1); pad2[pad_len - 2] = 0x04; pad2[pad_len - 1] = hash_len; if (memcmp(pad2, sig + u, pad_len) != 0) { return 0; } } memcpy(hash_out, sig + sig_len - hash_len, hash_len); return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_rsa_pss_sig_pad(const br_prng_class **rng, const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, uint32_t n_bitlen, unsigned char *x) { size_t xlen, hash_len; br_hash_compat_context hc; unsigned char *salt, *seed; hash_len = br_digest_size(hf_data); /* * The padded string is one bit smaller than the modulus; * notably, if the modulus length is equal to 1 modulo 8, then * the padded string will be one _byte_ smaller, and the first * byte will be set to 0. We apply these transformations here. */ n_bitlen --; if ((n_bitlen & 7) == 0) { *x ++ = 0; } xlen = (n_bitlen + 7) >> 3; /* * Check that the modulus is large enough for the hash value * length combined with the intended salt length. */ if (hash_len > xlen || salt_len > xlen || (hash_len + salt_len + 2) > xlen) { return 0; } /* * Produce a random salt. */ salt = x + xlen - hash_len - salt_len - 1; if (salt_len != 0) { (*rng)->generate(rng, salt, salt_len); } /* * Compute the seed for MGF1. */ seed = x + xlen - hash_len - 1; hf_data->init(&hc.vtable); memset(seed, 0, 8); hf_data->update(&hc.vtable, seed, 8); hf_data->update(&hc.vtable, hash, hash_len); hf_data->update(&hc.vtable, salt, salt_len); hf_data->out(&hc.vtable, seed); /* * Prepare string PS (padded salt). The salt is already at the * right place. */ memset(x, 0, xlen - salt_len - hash_len - 2); x[xlen - salt_len - hash_len - 2] = 0x01; /* * Generate the mask and XOR it into PS. */ br_mgf1_xor(x, xlen - hash_len - 1, hf_mgf1, seed, hash_len); /* * Clear the top bits to ensure the value is lower than the * modulus. */ x[0] &= 0xFF >> (((uint32_t)xlen << 3) - n_bitlen); /* * The seed (H) is already in the right place. We just set the * last byte. */ x[xlen - 1] = 0xBC; return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ uint32_t br_rsa_pss_sig_unpad(const br_hash_class *hf_data, const br_hash_class *hf_mgf1, const unsigned char *hash, size_t salt_len, const br_rsa_public_key *pk, unsigned char *x) { size_t u, xlen, hash_len; br_hash_compat_context hc; unsigned char *seed, *salt; unsigned char tmp[64]; uint32_t r, n_bitlen; hash_len = br_digest_size(hf_data); /* * Value r will be set to a non-zero value is any test fails. */ r = 0; /* * The value bit length (as an integer) must be strictly less than * that of the modulus. */ for (u = 0; u < pk->nlen; u ++) { if (pk->n[u] != 0) { break; } } if (u == pk->nlen) { return 0; } n_bitlen = BIT_LENGTH(pk->n[u]) + ((uint32_t)(pk->nlen - u - 1) << 3); n_bitlen --; if ((n_bitlen & 7) == 0) { r |= *x ++; } else { r |= x[0] & (0xFF << (n_bitlen & 7)); } xlen = (n_bitlen + 7) >> 3; /* * Check that the modulus is large enough for the hash value * length combined with the intended salt length. */ if (hash_len > xlen || salt_len > xlen || (hash_len + salt_len + 2) > xlen) { return 0; } /* * Check value of rightmost byte. */ r |= x[xlen - 1] ^ 0xBC; /* * Generate the mask and XOR it into the first bytes to reveal PS; * we must also mask out the leading bits. */ seed = x + xlen - hash_len - 1; br_mgf1_xor(x, xlen - hash_len - 1, hf_mgf1, seed, hash_len); if ((n_bitlen & 7) != 0) { x[0] &= 0xFF >> (8 - (n_bitlen & 7)); } /* * Check that all padding bytes have the expected value. */ for (u = 0; u < (xlen - hash_len - salt_len - 2); u ++) { r |= x[u]; } r |= x[xlen - hash_len - salt_len - 2] ^ 0x01; /* * Recompute H. */ salt = x + xlen - hash_len - salt_len - 1; hf_data->init(&hc.vtable); memset(tmp, 0, 8); hf_data->update(&hc.vtable, tmp, 8); hf_data->update(&hc.vtable, hash, hash_len); hf_data->update(&hc.vtable, salt, salt_len); hf_data->out(&hc.vtable, tmp); /* * Check that the recomputed H value matches the one appearing * in the string. */ for (u = 0; u < hash_len; u ++) { r |= tmp[u] ^ x[(xlen - hash_len - 1) + u]; } return EQ0(r); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_rsa.h */ uint32_t br_rsa_ssl_decrypt(br_rsa_private core, const br_rsa_private_key *sk, unsigned char *data, size_t len) { uint32_t x; size_t u; /* * A first check on length. Since this test works only on the * buffer length, it needs not (and cannot) be constant-time. */ if (len < 59 || len != (sk->n_bitlen + 7) >> 3) { return 0; } x = core(data, sk); x &= EQ(data[0], 0x00); x &= EQ(data[1], 0x02); for (u = 2; u < (len - 49); u ++) { x &= NEQ(data[u], 0); } x &= EQ(data[len - 49], 0x00); memmove(data, data + len - 48, 48); return x; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_tls_phash(void *dst, size_t len, const br_hash_class *dig, const void *secret, size_t secret_len, const char *label, size_t seed_num, const br_tls_prf_seed_chunk *seed) { unsigned char *buf; unsigned char tmp[64], a[64]; br_hmac_key_context kc; br_hmac_context hc; size_t label_len, hlen, u; if (len == 0) { return; } buf = (unsigned char*)dst; for (label_len = 0; label[label_len]; label_len ++); hlen = br_digest_size(dig); br_hmac_key_init(&kc, dig, secret, secret_len); br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, label, label_len); for (u = 0; u < seed_num; u ++) { br_hmac_update(&hc, seed[u].data, seed[u].len); } br_hmac_out(&hc, a); for (;;) { br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, a, hlen); br_hmac_update(&hc, label, label_len); for (u = 0; u < seed_num; u ++) { br_hmac_update(&hc, seed[u].data, seed[u].len); } br_hmac_out(&hc, tmp); for (u = 0; u < hlen && u < len; u ++) { buf[u] ^= tmp[u]; } buf += u; len -= u; if (len == 0) { return; } br_hmac_init(&hc, &kc, 0); br_hmac_update(&hc, a, hlen); br_hmac_out(&hc, a); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl.h */ void br_tls10_prf(void *dst, size_t len, const void *secret, size_t secret_len, const char *label, size_t seed_num, const br_tls_prf_seed_chunk *seed) { const unsigned char *s1; size_t slen; s1 = (const unsigned char*)secret; slen = (secret_len + 1) >> 1; memset(dst, 0, len); br_tls_phash(dst, len, &br_md5_vtable, s1, slen, label, seed_num, seed); br_tls_phash(dst, len, &br_sha1_vtable, s1 + secret_len - slen, slen, label, seed_num, seed); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl.h */ void br_tls12_sha256_prf(void *dst, size_t len, const void *secret, size_t secret_len, const char *label, size_t seed_num, const br_tls_prf_seed_chunk *seed) { memset(dst, 0, len); br_tls_phash(dst, len, &br_sha256_vtable, secret, secret_len, label, seed_num, seed); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl.h */ void br_tls12_sha384_prf(void *dst, size_t len, const void *secret, size_t secret_len, const char *label, size_t seed_num, const br_tls_prf_seed_chunk *seed) { memset(dst, 0, len); br_tls_phash(dst, len, &br_sha384_vtable, secret, secret_len, label, seed_num, seed); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static void _src_ssl_ssl_ccert_single_ec_ccc_none0(const br_ssl_client_certificate_class **pctx) { (void)pctx; } static void _src_ssl_ssl_ccert_single_ec_ccc_none1(const br_ssl_client_certificate_class **pctx, size_t len) { (void)pctx; (void)len; } static void _src_ssl_ssl_ccert_single_ec_ccc_none2(const br_ssl_client_certificate_class **pctx, const unsigned char *data, size_t len) { (void)pctx; (void)data; (void)len; } static void _src_ssl_ssl_ccert_single_ec_ccc_choose(const br_ssl_client_certificate_class **pctx, const br_ssl_client_context *cc, uint32_t auth_types, br_ssl_client_certificate *choices) { br_ssl_client_certificate_ec_context *zc; int x; int scurve; zc = (br_ssl_client_certificate_ec_context *)pctx; scurve = br_ssl_client_get_server_curve(cc); if ((zc->allowed_usages & BR_KEYTYPE_KEYX) != 0 && scurve == zc->sk->curve) { int x; x = (zc->issuer_key_type == BR_KEYTYPE_RSA) ? 16 : 17; if (((auth_types >> x) & 1) != 0) { choices->auth_type = BR_AUTH_ECDH; choices->hash_id = -1; choices->chain = zc->chain; choices->chain_len = zc->chain_len; return; } } /* * For ECDSA authentication, we must choose an appropriate * hash function. */ x = br_ssl_choose_hash((unsigned)(auth_types >> 8)); if (x == 0 || (zc->allowed_usages & BR_KEYTYPE_SIGN) == 0) { memset(choices, 0, sizeof *choices); return; } choices->auth_type = BR_AUTH_ECDSA; choices->hash_id = x; choices->chain = zc->chain; choices->chain_len = zc->chain_len; } static uint32_t cc_do_keyx(const br_ssl_client_certificate_class **pctx, unsigned char *data, size_t *len) { br_ssl_client_certificate_ec_context *zc; uint32_t r; size_t xoff, xlen; zc = (br_ssl_client_certificate_ec_context *)pctx; r = zc->iec->mul(data, *len, zc->sk->x, zc->sk->xlen, zc->sk->curve); xoff = zc->iec->xoff(zc->sk->curve, &xlen); memmove(data, data + xoff, xlen); *len = xlen; return r; } static size_t _src_ssl_ssl_ccert_single_ec_ccc_do_sign(const br_ssl_client_certificate_class **pctx, int hash_id, size_t hv_len, unsigned char *data, size_t len) { br_ssl_client_certificate_ec_context *zc; unsigned char hv[64]; const br_hash_class *hc; zc = (br_ssl_client_certificate_ec_context *)pctx; memcpy(hv, data, hv_len); hc = br_multihash_getimpl(zc->mhash, hash_id); if (hc == NULL) { return 0; } if (len < 139) { return 0; } return zc->iecdsa(zc->iec, hc, hv, zc->sk, data); } static const br_ssl_client_certificate_class _src_ssl_ssl_ccert_single_ec_cccert_vtable = { sizeof(br_ssl_client_certificate_ec_context), _src_ssl_ssl_ccert_single_ec_ccc_none0, /* start_name_list */ _src_ssl_ssl_ccert_single_ec_ccc_none1, /* start_name */ _src_ssl_ssl_ccert_single_ec_ccc_none2, /* append_name */ _src_ssl_ssl_ccert_single_ec_ccc_none0, /* end_name */ _src_ssl_ssl_ccert_single_ec_ccc_none0, /* end_name_list */ _src_ssl_ssl_ccert_single_ec_ccc_choose, cc_do_keyx, _src_ssl_ssl_ccert_single_ec_ccc_do_sign }; /* see bearssl_ssl.h */ void br_ssl_client_set_single_ec(br_ssl_client_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk, unsigned allowed_usages, unsigned cert_issuer_key_type, const br_ec_impl *iec, br_ecdsa_sign iecdsa) { cc->client_auth.single_ec.vtable = &_src_ssl_ssl_ccert_single_ec_cccert_vtable; cc->client_auth.single_ec.chain = chain; cc->client_auth.single_ec.chain_len = chain_len; cc->client_auth.single_ec.sk = sk; cc->client_auth.single_ec.allowed_usages = allowed_usages; cc->client_auth.single_ec.issuer_key_type = cert_issuer_key_type; cc->client_auth.single_ec.mhash = &cc->eng.mhash; cc->client_auth.single_ec.iec = iec; cc->client_auth.single_ec.iecdsa = iecdsa; cc->client_auth_vtable = &cc->client_auth.single_ec.vtable; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static void _src_ssl_ssl_ccert_single_rsa_ccc_none0(const br_ssl_client_certificate_class **pctx) { (void)pctx; } static void _src_ssl_ssl_ccert_single_rsa_ccc_none1(const br_ssl_client_certificate_class **pctx, size_t len) { (void)pctx; (void)len; } static void _src_ssl_ssl_ccert_single_rsa_ccc_none2(const br_ssl_client_certificate_class **pctx, const unsigned char *data, size_t len) { (void)pctx; (void)data; (void)len; } static void _src_ssl_ssl_ccert_single_rsa_ccc_choose(const br_ssl_client_certificate_class **pctx, const br_ssl_client_context *cc, uint32_t auth_types, br_ssl_client_certificate *choices) { br_ssl_client_certificate_rsa_context *zc; int x; (void)cc; zc = (br_ssl_client_certificate_rsa_context *)pctx; x = br_ssl_choose_hash((unsigned)auth_types); if (x == 0 && (auth_types & 1) == 0) { memset(choices, 0, sizeof *choices); } choices->auth_type = BR_AUTH_RSA; choices->hash_id = x; choices->chain = zc->chain; choices->chain_len = zc->chain_len; } /* * OID for hash functions in RSA signatures. */ static const unsigned char _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA1[] = { 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A }; static const unsigned char _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA224[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04 }; static const unsigned char _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA256[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01 }; static const unsigned char _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA384[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02 }; static const unsigned char _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA512[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03 }; static const unsigned char *_src_ssl_ssl_ccert_single_rsa_cHASH_OID[] = { _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA1, _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA224, _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA256, _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA384, _src_ssl_ssl_ccert_single_rsa_cHASH_OID_SHA512 }; static size_t _src_ssl_ssl_ccert_single_rsa_ccc_do_sign(const br_ssl_client_certificate_class **pctx, int hash_id, size_t hv_len, unsigned char *data, size_t len) { br_ssl_client_certificate_rsa_context *zc; unsigned char hv[64]; const unsigned char *hash_oid; size_t sig_len; zc = (br_ssl_client_certificate_rsa_context *)pctx; memcpy(hv, data, hv_len); if (hash_id == 0) { hash_oid = NULL; } else if (hash_id >= 2 && hash_id <= 6) { hash_oid = _src_ssl_ssl_ccert_single_rsa_cHASH_OID[hash_id - 2]; } else { return 0; } sig_len = (zc->sk->n_bitlen + 7) >> 3; if (len < sig_len) { return 0; } return zc->irsasign(hash_oid, hv, hv_len, zc->sk, data) ? sig_len : 0; } static const br_ssl_client_certificate_class _src_ssl_ssl_ccert_single_rsa_cccert_vtable = { sizeof(br_ssl_client_certificate_rsa_context), _src_ssl_ssl_ccert_single_rsa_ccc_none0, /* start_name_list */ _src_ssl_ssl_ccert_single_rsa_ccc_none1, /* start_name */ _src_ssl_ssl_ccert_single_rsa_ccc_none2, /* append_name */ _src_ssl_ssl_ccert_single_rsa_ccc_none0, /* end_name */ _src_ssl_ssl_ccert_single_rsa_ccc_none0, /* end_name_list */ _src_ssl_ssl_ccert_single_rsa_ccc_choose, 0, _src_ssl_ssl_ccert_single_rsa_ccc_do_sign }; /* see bearssl_ssl.h */ void br_ssl_client_set_single_rsa(br_ssl_client_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk, br_rsa_pkcs1_sign irsasign) { cc->client_auth.single_rsa.vtable = &_src_ssl_ssl_ccert_single_rsa_cccert_vtable; cc->client_auth.single_rsa.chain = chain; cc->client_auth.single_rsa.chain_len = chain_len; cc->client_auth.single_rsa.sk = sk; cc->client_auth.single_rsa.irsasign = irsasign; cc->client_auth_vtable = &cc->client_auth.single_rsa.vtable; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_client_zero(br_ssl_client_context *cc) { /* * For really standard C, we should explicitly set to NULL all * pointers, and 0 all other fields. However, on all our target * architectures, a direct memset() will work, be faster, and * use a lot less code. */ memset(cc, 0, sizeof *cc); } /* see bearssl_ssl.h */ int br_ssl_client_reset(br_ssl_client_context *cc, const char *server_name, int resume_session) { size_t n; br_ssl_engine_set_buffer(&cc->eng, NULL, 0, 0); cc->eng.version_out = cc->eng.version_min; if (!resume_session) { br_ssl_client_forget_session(cc); } if (!br_ssl_engine_init_rand(&cc->eng)) { return 0; } /* * We always set back the "reneg" flag to 0 because we use it * to distinguish between first handshake and renegotiation. * Note that "renegotiation" and "session resumption" are two * different things. */ cc->eng.reneg = 0; if (server_name == NULL) { cc->eng.server_name[0] = 0; } else { n = strlen(server_name) + 1; if (n > sizeof cc->eng.server_name) { br_ssl_engine_fail(&cc->eng, BR_ERR_BAD_PARAM); return 0; } memcpy(cc->eng.server_name, server_name, n); } br_ssl_engine_hs_reset(&cc->eng, br_ssl_hs_client_init_main, br_ssl_hs_client_run); return br_ssl_engine_last_error(&cc->eng) == BR_ERR_OK; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_client_set_default_rsapub(br_ssl_client_context *cc) { br_ssl_client_set_rsapub(cc, br_rsa_public_get_default()); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_client_init_full(br_ssl_client_context *cc, br_x509_minimal_context *xc, const br_x509_trust_anchor *trust_anchors, size_t trust_anchors_num) { /* * The "full" profile supports all implemented cipher suites. * * Rationale for suite order, from most important to least * important rule: * * -- Don't use 3DES if AES or ChaCha20 is available. * -- Try to have Forward Secrecy (ECDHE suite) if possible. * -- When not using Forward Secrecy, ECDH key exchange is * better than RSA key exchange (slightly more expensive on the * client, but much cheaper on the server, and it implies smaller * messages). * -- ChaCha20+Poly1305 is better than AES/GCM (faster, smaller code). * -- GCM is better than CCM and CBC. CCM is better than CBC. * -- CCM is preferable over CCM_8 (with CCM_8, forgeries may succeed * with probability 2^(-64)). * -- AES-128 is preferred over AES-256 (AES-128 is already * strong enough, and AES-256 is 40% more expensive). */ static const uint16_t suites[] = { BR_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, BR_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, BR_TLS_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_RSA_WITH_AES_128_CCM, BR_TLS_RSA_WITH_AES_256_CCM, BR_TLS_RSA_WITH_AES_128_CCM_8, BR_TLS_RSA_WITH_AES_256_CCM_8, BR_TLS_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_RSA_WITH_AES_256_CBC_SHA256, BR_TLS_RSA_WITH_AES_128_CBC_SHA, BR_TLS_RSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_RSA_WITH_3DES_EDE_CBC_SHA }; /* * All hash functions are activated. * Note: the X.509 validation engine will nonetheless refuse to * validate signatures that use MD5 as hash function. */ static const br_hash_class *hashes[] = { &br_md5_vtable, &br_sha1_vtable, &br_sha224_vtable, &br_sha256_vtable, &br_sha384_vtable, &br_sha512_vtable }; int id; /* * Reset client context and set supported versions from TLS-1.0 * to TLS-1.2 (inclusive). */ br_ssl_client_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12); /* * X.509 engine uses SHA-256 to hash certificate DN (for * comparisons). */ br_x509_minimal_init(xc, &br_sha256_vtable, trust_anchors, trust_anchors_num); /* * Set suites and asymmetric crypto implementations. We use the * "i31" code for RSA (it is somewhat faster than the "i32" * implementation). * TODO: change that when better implementations are made available. */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_client_set_default_rsapub(cc); br_ssl_engine_set_default_rsavrfy(&cc->eng); br_ssl_engine_set_default_ecdsa(&cc->eng); br_x509_minimal_set_rsa(xc, br_ssl_engine_get_rsavrfy(&cc->eng)); br_x509_minimal_set_ecdsa(xc, br_ssl_engine_get_ec(&cc->eng), br_ssl_engine_get_ecdsa(&cc->eng)); /* * Set supported hash functions, for the SSL engine and for the * X.509 engine. */ for (id = br_md5_ID; id <= br_sha512_ID; id ++) { const br_hash_class *hc; hc = hashes[id - 1]; br_ssl_engine_set_hash(&cc->eng, id, hc); br_x509_minimal_set_hash(xc, id, hc); } /* * Link the X.509 engine in the SSL engine. */ br_ssl_engine_set_x509(&cc->eng, &xc->vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf); br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf); /* * Symmetric encryption. We use the "default" implementations * (fastest among constant-time implementations). */ br_ssl_engine_set_default_aes_cbc(&cc->eng); br_ssl_engine_set_default_aes_ccm(&cc->eng); br_ssl_engine_set_default_aes_gcm(&cc->eng); br_ssl_engine_set_default_des_cbc(&cc->eng); br_ssl_engine_set_default_chapol(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if 0 /* obsolete */ /* * If BR_USE_URANDOM is not defined, then try to autodetect its presence * through compiler macros. */ #ifndef BR_USE_URANDOM /* * Macro values documented on: * https://sourceforge.net/p/predef/wiki/OperatingSystems/ * * Only the most common systems have been included here for now. This * should be enriched later on. */ #if defined _AIX \ || defined __ANDROID__ \ || defined __FreeBSD__ \ || defined __NetBSD__ \ || defined __OpenBSD__ \ || defined __DragonFly__ \ || defined __linux__ \ || (defined __sun && (defined __SVR4 || defined __svr4__)) \ || (defined __APPLE__ && defined __MACH__) #define BR_USE_URANDOM 1 #endif #endif /* * If BR_USE_WIN32_RAND is not defined, perform autodetection here. */ #ifndef BR_USE_WIN32_RAND #if defined _WIN32 || defined _WIN64 #define BR_USE_WIN32_RAND 1 #endif #endif #if BR_USE_URANDOM #include #include #include #include #endif #if BR_USE_WIN32_RAND #include #include #pragma comment(lib, "advapi32") #endif #endif /* ==================================================================== */ /* * This part of the file does the low-level record management. */ /* * IMPLEMENTATION NOTES * ==================== * * In this file, we designate by "input" (and the "i" letter) the "recv" * operations: incoming records from the peer, from which payload data * is obtained, and must be extracted by the application (or the SSL * handshake engine). Similarly, "output" (and the "o" letter) is for * "send": payload data injected by the application (and SSL handshake * engine), to be wrapped into records, that are then conveyed to the * peer over the transport medium. * * The input and output buffers may be distinct or shared. When * shared, input and output cannot occur concurrently; the caller * must make sure that it never needs to output data while input * data has been received. In practice, a shared buffer prevents * pipelining of HTTP requests, or similar protocols; however, a * shared buffer saves RAM. * * The input buffer is pointed to by 'ibuf' and has size 'ibuf_len'; * the output buffer is pointed to by 'obuf' and has size 'obuf_len'. * From the size of these buffers is derived the maximum fragment * length, which will be honoured upon sending records; regardless of * that length, incoming records will be processed as long as they * fit in the input buffer, and their length still complies with the * protocol specification (maximum plaintext payload length is 16384 * bytes). * * Three registers are used to manage buffering in ibuf, called ixa, * ixb and ixc. Similarly, three registers are used to manage buffering * in obuf, called oxa, oxb and oxc. * * * At any time, the engine is in one of the following modes: * -- Failed mode: an error occurs, no I/O can happen. * -- Input mode: the engine can either receive record bytes from the * transport layer, or it has some buffered payload bytes to yield. * -- Output mode: the engine can either receive payload bytes, or it * has some record bytes to send to the transport layer. * -- Input/Output mode: both input and output modes are active. When * the buffer is shared, this can happen only when the buffer is empty * (no buffered payload bytes or record bytes in either direction). * * * Failed mode: * ------------ * * I/O failed for some reason (invalid received data, not enough room * for the next record...). No I/O may ever occur again for this context, * until an explicit reset is performed. This mode, and the error code, * are also used for protocol errors, especially handshake errors. * * * Input mode: * ----------- * * ixa index within ibuf[] for the currently read data * ixb maximum index within ibuf[] for the currently read data * ixc number of bytes not yet received for the current record * * -- When ixa == ixb, there is no available data for readers. When * ixa != ixb, there is available data and it starts at offset ixa. * * -- When waiting for the next record header, ixa and ixb are equal * and contain a value ranging from 0 to 4; ixc is equal to 5-ixa. * * -- When the header has been received, record data is obtained. The * ixc field records how many bytes are still needed to reach the * end of the current record. * * ** If encryption is active, then ixa and ixb are kept equal, and * point to the end of the currently received record bytes. When * ixc reaches 0, decryption/MAC is applied, and ixa and ixb are * adjusted. * * ** If encryption is not active, then ixa and ixb are distinct * and data can be read right away. Additional record data is * obtained only when ixa == ixb. * * Note: in input mode and no encryption, records larger than the buffer * size are allowed. When encryption is active, the complete record must * fit within the buffer, since it cannot be decrypted/MACed until it * has been completely received. * * -- When receiving the next record header, 'version_in' contains the * expected input version (0 if not expecting a specific version); on * mismatch, the mode switches to 'failed'. * * -- When the header has been received, 'version_in' contains the received * version. It is up to the caller to check and adjust the 'version_in' field * to implement the required semantics. * * -- The 'record_type_in' field is updated with the incoming record type * when the next record header has been received. * * * Output mode: * ------------ * * oxa index within obuf[] for the currently accumulated data * oxb maximum index within obuf[] for record data * oxc pointer for start of record data, and for record sending * * -- When oxa != oxb, more data can be accumulated into the current * record; when oxa == oxb, a closed record is being sent. * * -- When accumulating data, oxc points to the start of the data. * * -- During record sending, oxa (and oxb) point to the next record byte * to send, and oxc indicates the end of the current record. * * Note: sent records must fit within the buffer, since the header is * adjusted only when the complete record has been assembled. * * -- The 'version_out' and 'record_type_out' fields are used to build the * record header when the mode is switched to 'sending'. * * * Modes: * ------ * * The state register iomode contains one of the following values: * * BR_IO_FAILED I/O failed * BR_IO_IN input mode * BR_IO_OUT output mode * BR_IO_INOUT input/output mode * * Whether encryption is active on incoming records is indicated by the * incrypt flag. For outgoing records, there is no such flag; "encryption" * is always considered active, but initially uses functions that do not * encrypt anything. The 'incrypt' flag is needed because when there is * no active encryption, records larger than the I/O buffer are accepted. * * Note: we do not support no-encryption modes (MAC only). * * TODO: implement GCM support * * * Misc: * ----- * * 'max_frag_len' is the maximum plaintext size for an outgoing record. * By default, it is set to the maximum value that fits in the provided * buffers, in the following list: 512, 1024, 2048, 4096, 16384. The * caller may change it if needed, but the new value MUST still fit in * the buffers, and it MUST be one of the list above for compatibility * with the Maximum Fragment Length extension. * * For incoming records, only the total buffer length and current * encryption mode impact the maximum length for incoming records. The * 'max_frag_len' value is still adjusted so that records up to that * length can be both received and sent. * * * Offsets and lengths: * -------------------- * * When sending fragments with TLS-1.1+, the maximum overhead is: * 5 bytes for the record header * 16 bytes for the explicit IV * 48 bytes for the MAC (HMAC/SHA-384) * 16 bytes for the padding (AES) * so a total of 85 extra bytes. Note that we support block cipher sizes * up to 16 bytes (AES) and HMAC output sizes up to 48 bytes (SHA-384). * * With TLS-1.0 and CBC mode, we apply a 1/n-1 split, for a maximum * overhead of: * 5 bytes for the first record header * 32 bytes for the first record payload (AES-CBC + HMAC/SHA-1) * 5 bytes for the second record header * 20 bytes for the MAC (HMAC/SHA-1) * 16 bytes for the padding (AES) * -1 byte to account for the payload byte in the first record * so a total of 77 extra bytes at most, less than the 85 bytes above. * Note that with TLS-1.0, the MAC is HMAC with either MD5 or SHA-1, but * no other hash function. * * The implementation does not try to send larger records when the current * encryption mode has less overhead. * * Maximum input record overhead is: * 5 bytes for the record header * 16 bytes for the explicit IV (TLS-1.1+) * 48 bytes for the MAC (HMAC/SHA-384) * 256 bytes for the padding * so a total of 325 extra bytes. * * When receiving the next record header, it is written into the buffer * bytes 0 to 4 (inclusive). Record data is always written into buf[] * starting at offset 5. When encryption is active, the plaintext data * may start at a larger offset (e.g. because of an explicit IV). */ #define MAX_OUT_OVERHEAD 85 #define MAX_IN_OVERHEAD 325 /* see inner.h */ void br_ssl_engine_fail(br_ssl_engine_context *rc, int err) { if (rc->iomode != BR_IO_FAILED) { rc->iomode = BR_IO_FAILED; rc->err = err; } } /* * Adjust registers for a new incoming record. */ static void make_ready_in(br_ssl_engine_context *rc) { rc->ixa = rc->ixb = 0; rc->ixc = 5; if (rc->iomode == BR_IO_IN) { rc->iomode = BR_IO_INOUT; } } /* * Adjust registers for a new outgoing record. */ static void make_ready_out(br_ssl_engine_context *rc) { size_t a, b; a = 5; b = rc->obuf_len - a; rc->out.vtable->max_plaintext(&rc->out.vtable, &a, &b); if ((b - a) > rc->max_frag_len) { b = a + rc->max_frag_len; } rc->oxa = a; rc->oxb = b; rc->oxc = a; if (rc->iomode == BR_IO_OUT) { rc->iomode = BR_IO_INOUT; } } /* see inner.h */ void br_ssl_engine_new_max_frag_len(br_ssl_engine_context *rc, unsigned max_frag_len) { size_t nxb; rc->max_frag_len = max_frag_len; nxb = rc->oxc + max_frag_len; if (rc->oxa < rc->oxb && rc->oxb > nxb && rc->oxa < nxb) { rc->oxb = nxb; } } /* see bearssl_ssl.h */ void br_ssl_engine_set_buffer(br_ssl_engine_context *rc, void *buf, size_t buf_len, int bidi) { if (buf == NULL) { br_ssl_engine_set_buffers_bidi(rc, NULL, 0, NULL, 0); } else { /* * In bidirectional mode, we want to maximise input * buffer size, since we support arbitrary fragmentation * when sending, but the peer will not necessarily * comply to any low fragment length (in particular if * we are the server, because the maximum fragment * length extension is under client control). * * We keep a minimum size of 512 bytes for the plaintext * of our outgoing records. * * br_ssl_engine_set_buffers_bidi() will compute the maximum * fragment length for outgoing records by using the minimum * of allocated spaces for both input and output records, * rounded down to a standard length. */ if (bidi) { size_t w; if (buf_len < (512 + MAX_IN_OVERHEAD + 512 + MAX_OUT_OVERHEAD)) { rc->iomode = BR_IO_FAILED; rc->err = BR_ERR_BAD_PARAM; return; } else if (buf_len < (16384 + MAX_IN_OVERHEAD + 512 + MAX_OUT_OVERHEAD)) { w = 512 + MAX_OUT_OVERHEAD; } else { w = buf_len - (16384 + MAX_IN_OVERHEAD); } br_ssl_engine_set_buffers_bidi(rc, buf, buf_len - w, (unsigned char *)buf + w, w); } else { br_ssl_engine_set_buffers_bidi(rc, buf, buf_len, NULL, 0); } } } /* see bearssl_ssl.h */ void br_ssl_engine_set_buffers_bidi(br_ssl_engine_context *rc, void *ibuf, size_t ibuf_len, void *obuf, size_t obuf_len) { rc->iomode = BR_IO_INOUT; rc->incrypt = 0; rc->err = BR_ERR_OK; rc->version_in = 0; rc->record_type_in = 0; rc->version_out = 0; rc->record_type_out = 0; if (ibuf == NULL) { if (rc->ibuf == NULL) { br_ssl_engine_fail(rc, BR_ERR_BAD_PARAM); } } else { unsigned u; rc->ibuf = (unsigned char*)ibuf; rc->ibuf_len = ibuf_len; if (obuf == NULL) { obuf = ibuf; obuf_len = ibuf_len; } rc->obuf = (unsigned char*)obuf; rc->obuf_len = obuf_len; /* * Compute the maximum fragment length, that fits for * both incoming and outgoing records. This length will * be used in fragment length negotiation, so we must * honour it both ways. Regardless, larger incoming * records will be accepted, as long as they fit in the * actual buffer size. */ for (u = 14; u >= 9; u --) { size_t flen; flen = (size_t)1 << u; if (obuf_len >= flen + MAX_OUT_OVERHEAD && ibuf_len >= flen + MAX_IN_OVERHEAD) { break; } } if (u == 8) { br_ssl_engine_fail(rc, BR_ERR_BAD_PARAM); return; } else if (u == 13) { u = 12; } rc->max_frag_len = (size_t)1 << u; rc->log_max_frag_len = u; rc->peer_log_max_frag_len = 0; } rc->out.vtable = &br_sslrec_out_clear_vtable; make_ready_in(rc); make_ready_out(rc); } /* * Clear buffers in both directions. */ static void engine_clearbuf(br_ssl_engine_context *rc) { make_ready_in(rc); make_ready_out(rc); } /* * Make sure the internal PRNG is initialised (but not necessarily * seeded properly yet). */ static int rng_init(br_ssl_engine_context *cc) { const br_hash_class *h; if (cc->rng_init_done != 0) { return 1; } /* * If using TLS-1.2, then SHA-256 or SHA-384 must be present (or * both); we prefer SHA-256 which is faster for 32-bit systems. * * If using TLS-1.0 or 1.1 then SHA-1 must be present. * * Though HMAC_DRBG/SHA-1 is, as far as we know, as safe as * these things can be, we still prefer the SHA-2 functions over * SHA-1, if only for public relations (known theoretical * weaknesses of SHA-1 with regards to collisions are mostly * irrelevant here, but they still make people nervous). */ h = br_multihash_getimpl(&cc->mhash, br_sha256_ID); if (!h) { h = br_multihash_getimpl(&cc->mhash, br_sha384_ID); if (!h) { h = br_multihash_getimpl(&cc->mhash, br_sha1_ID); if (!h) { br_ssl_engine_fail(cc, BR_ERR_BAD_STATE); return 0; } } } br_hmac_drbg_init(&cc->rng, h, NULL, 0); cc->rng_init_done = 1; return 1; } /* see inner.h */ int br_ssl_engine_init_rand(br_ssl_engine_context *cc) { if (!rng_init(cc)) { return 0; } /* * We always try OS/hardware seeding once. If it works, then * we assume proper seeding. If not, then external entropy must * have been injected; otherwise, we report an error. */ if (!cc->rng_os_rand_done) { br_prng_seeder sd; sd = br_prng_seeder_system(NULL); if (sd != 0 && sd(&cc->rng.vtable)) { cc->rng_init_done = 2; } cc->rng_os_rand_done = 1; } if (cc->rng_init_done < 2) { br_ssl_engine_fail(cc, BR_ERR_NO_RANDOM); return 0; } return 1; } /* see bearssl_ssl.h */ void br_ssl_engine_inject_entropy(br_ssl_engine_context *cc, const void *data, size_t len) { /* * Externally provided entropy is assumed to be "good enough" * (we cannot really test its quality) so if the RNG structure * could be initialised at all, then we marked the RNG as * "properly seeded". */ if (!rng_init(cc)) { return; } br_hmac_drbg_update(&cc->rng, data, len); cc->rng_init_done = 2; } /* * We define a few internal functions that implement the low-level engine * API for I/O; the external API (br_ssl_engine_sendapp_buf() and similar * functions) is built upon these function, with special processing for * records which are not of type "application data". * * recvrec_buf, recvrec_ack receives bytes from transport medium * sendrec_buf, sendrec_ack send bytes to transport medium * recvpld_buf, recvpld_ack receives payload data from engine * sendpld_buf, sendpld_ack send payload data to engine */ static unsigned char * recvrec_buf(const br_ssl_engine_context *rc, size_t *len) { if (rc->shutdown_recv) { *len = 0; return NULL; } /* * Bytes from the transport can be injected only if the mode is * compatible (in or in/out), and ixa == ixb; ixc then contains * the number of bytes that are still expected (but it may * exceed our buffer size). * * We cannot get "stuck" here (buffer is full, but still more * data is expected) because oversized records are detected when * their header is processed. */ switch (rc->iomode) { case BR_IO_IN: case BR_IO_INOUT: if (rc->ixa == rc->ixb) { size_t z; z = rc->ixc; if (z > rc->ibuf_len - rc->ixa) { z = rc->ibuf_len - rc->ixa; } *len = z; return rc->ibuf + rc->ixa; } break; } *len = 0; return NULL; } static void recvrec_ack(br_ssl_engine_context *rc, size_t len) { unsigned char *pbuf; size_t pbuf_len; /* * Adjust state if necessary (for a shared input/output buffer): * we got some incoming bytes, so we cannot (temporarily) handle * outgoing data. */ if (rc->iomode == BR_IO_INOUT && rc->ibuf == rc->obuf) { rc->iomode = BR_IO_IN; } /* * Adjust data pointers. */ rc->ixb = (rc->ixa += len); rc->ixc -= len; /* * If we are receiving a header and did not fully obtained it * yet, then just wait for the next bytes. */ if (rc->ixa < 5) { return; } /* * If we just obtained a full header, process it. */ if (rc->ixa == 5) { unsigned version; unsigned rlen; /* * Get record type and version. We support only versions * 3.x (if the version major number does not match, then * we suppose that the record format is too alien for us * to process it). * * Note: right now, we reject clients that try to send * a ClientHello in a format compatible with SSL-2.0. It * is unclear whether this will ever be supported; and * if we want to support it, then this might be done in * in the server-specific code, not here. */ rc->record_type_in = rc->ibuf[0]; version = br_dec16be(rc->ibuf + 1); if ((version >> 8) != 3) { br_ssl_engine_fail(rc, BR_ERR_UNSUPPORTED_VERSION); return; } /* * We ensure that successive records have the same * version. The handshake code must check and adjust the * variables when necessary to accommodate the protocol * negotiation details. */ if (rc->version_in != 0 && rc->version_in != version) { br_ssl_engine_fail(rc, BR_ERR_BAD_VERSION); return; } rc->version_in = version; /* * Decode record length. We must check that the length * is valid (relatively to the current encryption mode) * and also (if encryption is active) that the record * will fit in our buffer. * * When no encryption is active, we can process records * by chunks, and thus accept any record up to the * maximum allowed plaintext length (16384 bytes). */ rlen = br_dec16be(rc->ibuf + 3); if (rc->incrypt) { if (!rc->in.vtable->check_length( &rc->in.vtable, rlen)) { br_ssl_engine_fail(rc, BR_ERR_BAD_LENGTH); return; } if (rlen > (rc->ibuf_len - 5)) { br_ssl_engine_fail(rc, BR_ERR_TOO_LARGE); return; } } else { if (rlen > 16384) { br_ssl_engine_fail(rc, BR_ERR_BAD_LENGTH); return; } } /* * If the record is completely empty then we must switch * to a new record. Note that, in that case, we * completely ignore the record type, which is fitting * since we received no actual data of that type. * * A completely empty record is technically allowed as * long as encryption/MAC is not active, i.e. before * completion of the first handshake. It it still weird; * it might conceptually be useful as a heartbeat or * keep-alive mechanism while some lengthy operation is * going on, e.g. interaction with a human user. */ if (rlen == 0) { make_ready_in(rc); } else { rc->ixa = rc->ixb = 5; rc->ixc = rlen; } return; } /* * If there is no active encryption, then the data can be read * right away. Note that we do not receive bytes from the * transport medium when we still have payload bytes to be * acknowledged. */ if (!rc->incrypt) { rc->ixa = 5; return; } /* * Since encryption is active, we must wait for a full record * before processing it. */ if (rc->ixc != 0) { return; } /* * We got the full record. Decrypt it. */ pbuf_len = rc->ixa - 5; pbuf = rc->in.vtable->decrypt(&rc->in.vtable, rc->record_type_in, rc->version_in, rc->ibuf + 5, &pbuf_len); if (pbuf == 0) { br_ssl_engine_fail(rc, BR_ERR_BAD_MAC); return; } rc->ixa = (size_t)(pbuf - rc->ibuf); rc->ixb = rc->ixa + pbuf_len; /* * Decryption may have yielded an empty record, in which case * we get back to "ready" state immediately. */ if (rc->ixa == rc->ixb) { make_ready_in(rc); } } /* see inner.h */ int br_ssl_engine_recvrec_finished(const br_ssl_engine_context *rc) { switch (rc->iomode) { case BR_IO_IN: case BR_IO_INOUT: return rc->ixc == 0 || rc->ixa < 5; default: return 1; } } static unsigned char * recvpld_buf(const br_ssl_engine_context *rc, size_t *len) { /* * There is payload data to be read only if the mode is * compatible, and ixa != ixb. */ switch (rc->iomode) { case BR_IO_IN: case BR_IO_INOUT: *len = rc->ixb - rc->ixa; return (*len == 0) ? NULL : (rc->ibuf + rc->ixa); default: *len = 0; return NULL; } } static void recvpld_ack(br_ssl_engine_context *rc, size_t len) { rc->ixa += len; /* * If we read all the available data, then we either expect * the remainder of the current record (if the current record * was not finished; this may happen when encryption is not * active), or go to "ready" state. */ if (rc->ixa == rc->ixb) { if (rc->ixc == 0) { make_ready_in(rc); } else { rc->ixa = rc->ixb = 5; } } } static unsigned char * sendpld_buf(const br_ssl_engine_context *rc, size_t *len) { /* * Payload data can be injected only if the current mode is * compatible, and oxa != oxb. */ switch (rc->iomode) { case BR_IO_OUT: case BR_IO_INOUT: *len = rc->oxb - rc->oxa; return (*len == 0) ? NULL : (rc->obuf + rc->oxa); default: *len = 0; return NULL; } } /* * If some payload bytes have been accumulated, then wrap them into * an outgoing record. Otherwise, this function does nothing, unless * 'force' is non-zero, in which case an empty record is assembled. * * The caller must take care not to invoke this function if the engine * is not currently ready to receive payload bytes to send. */ static void sendpld_flush(br_ssl_engine_context *rc, int force) { size_t xlen; unsigned char *buf; if (rc->oxa == rc->oxb) { return; } xlen = rc->oxa - rc->oxc; if (xlen == 0 && !force) { return; } buf = rc->out.vtable->encrypt(&rc->out.vtable, rc->record_type_out, rc->version_out, rc->obuf + rc->oxc, &xlen); rc->oxb = rc->oxa = (size_t)(buf - rc->obuf); rc->oxc = rc->oxa + xlen; } static void sendpld_ack(br_ssl_engine_context *rc, size_t len) { /* * If using a shared buffer, then we may have to modify the * current mode. */ if (rc->iomode == BR_IO_INOUT && rc->ibuf == rc->obuf) { rc->iomode = BR_IO_OUT; } rc->oxa += len; if (rc->oxa >= rc->oxb) { /* * Set oxb to one more than oxa so that sendpld_flush() * does not mistakingly believe that a record is * already prepared and being sent. */ rc->oxb = rc->oxa + 1; sendpld_flush(rc, 0); } } static unsigned char * sendrec_buf(const br_ssl_engine_context *rc, size_t *len) { /* * When still gathering payload bytes, oxc points to the start * of the record data, so oxc <= oxa. However, when a full * record has been completed, oxc points to the end of the record, * so oxc > oxa. */ switch (rc->iomode) { case BR_IO_OUT: case BR_IO_INOUT: if (rc->oxc > rc->oxa) { *len = rc->oxc - rc->oxa; return rc->obuf + rc->oxa; } break; } *len = 0; return NULL; } static void sendrec_ack(br_ssl_engine_context *rc, size_t len) { rc->oxb = (rc->oxa += len); if (rc->oxa == rc->oxc) { make_ready_out(rc); } } /* * Test whether there is some buffered outgoing record that still must * sent. */ static inline int has_rec_tosend(const br_ssl_engine_context *rc) { return rc->oxa == rc->oxb && rc->oxa != rc->oxc; } /* * The "no encryption" mode has no overhead. It limits the payload size * to the maximum size allowed by the standard (16384 bytes); the caller * is responsible for possibly enforcing a smaller fragment length. */ static void clear_max_plaintext(const br_sslrec_out_clear_context *cc, size_t *start, size_t *end) { size_t len; (void)cc; len = *end - *start; if (len > 16384) { *end = *start + 16384; } } /* * In "no encryption" mode, encryption is trivial (a no-operation) so * we just have to encode the header. */ static unsigned char * clear_encrypt(br_sslrec_out_clear_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf; (void)cc; buf = (unsigned char *)data - 5; buf[0] = record_type; br_enc16be(buf + 1, version); br_enc16be(buf + 3, *data_len); *data_len += 5; return buf; } /* see bearssl_ssl.h */ const br_sslrec_out_class br_sslrec_out_clear_vtable = { sizeof(br_sslrec_out_clear_context), (void (*)(const br_sslrec_out_class *const *, size_t *, size_t *)) &clear_max_plaintext, (unsigned char *(*)(const br_sslrec_out_class **, int, unsigned, void *, size_t *)) &clear_encrypt }; /* ==================================================================== */ /* * In this part of the file, we handle the various record types, and * communications with the handshake processor. */ /* * IMPLEMENTATION NOTES * ==================== * * The handshake processor is written in T0 and runs as a coroutine. * It receives the contents of all records except application data, and * is responsible for producing the contents of all records except * application data. * * A state flag is maintained, which specifies whether application data * is acceptable or not. When it is set: * * -- Application data can be injected as payload data (provided that * the output buffer is ready for that). * * -- Incoming application data records are accepted, and yield data * that the caller may retrieve. * * When the flag is cleared, application data is not accepted from the * application, and incoming application data records trigger an error. * * * Records of type handshake, alert or change-cipher-spec are handled * by the handshake processor. The handshake processor is written in T0 * and runs as a coroutine; it gets invoked whenever one of the following * situations is reached: * * -- An incoming record has type handshake, alert or change-cipher-spec, * and yields data that can be read (zero-length records are thus * ignored). * * -- An outgoing record has just finished being sent, and the "application * data" flag is cleared. * * -- The caller wishes to perform a close (call to br_ssl_engine_close()). * * -- The caller wishes to perform a renegotiation (call to * br_ssl_engine_renegotiate()). * * Whenever the handshake processor is entered, access to the payload * buffers is provided, along with some information about explicit * closures or renegotiations. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_suites(br_ssl_engine_context *cc, const uint16_t *suites, size_t suites_num) { if ((suites_num * sizeof *suites) > sizeof cc->suites_buf) { br_ssl_engine_fail(cc, BR_ERR_BAD_PARAM); return; } memcpy(cc->suites_buf, suites, suites_num * sizeof *suites); cc->suites_num = suites_num; } /* * Give control to handshake processor. 'action' is 1 for a close, * 2 for a renegotiation, or 0 for a jump due to I/O completion. */ static void jump_handshake(br_ssl_engine_context *cc, int action) { /* * We use a loop because the handshake processor actions may * allow for more actions; namely, if the processor reads all * input data, then it may allow for output data to be produced, * in case of a shared in/out buffer. */ for (;;) { size_t hlen_in, hlen_out; /* * Get input buffer. We do not want to provide * application data to the handshake processor (we could * get called with an explicit close or renegotiation * while there is application data ready to be read). */ cc->hbuf_in = recvpld_buf(cc, &hlen_in); if (cc->hbuf_in != NULL && cc->record_type_in == BR_SSL_APPLICATION_DATA) { hlen_in = 0; } /* * Get output buffer. The handshake processor never * leaves an unfinished outgoing record, so if there is * buffered output, then it MUST be some application * data, so the processor cannot write to it. */ cc->saved_hbuf_out = cc->hbuf_out = sendpld_buf(cc, &hlen_out); if (cc->hbuf_out != NULL && br_ssl_engine_has_pld_to_send(cc)) { hlen_out = 0; } /* * Note: hlen_in and hlen_out can be both non-zero only if * the input and output buffers are disjoint. Thus, we can * offer both buffers to the handshake code. */ cc->hlen_in = hlen_in; cc->hlen_out = hlen_out; cc->action = action; cc->hsrun(&cc->cpu); if (br_ssl_engine_closed(cc)) { return; } if (cc->hbuf_out != cc->saved_hbuf_out) { sendpld_ack(cc, cc->hbuf_out - cc->saved_hbuf_out); } if (hlen_in != cc->hlen_in) { recvpld_ack(cc, hlen_in - cc->hlen_in); if (cc->hlen_in == 0) { /* * We read all data bytes, which may have * released the output buffer in case it * is shared with the input buffer, and * the handshake code might be waiting for * that. */ action = 0; continue; } } break; } } /* see inner.h */ void br_ssl_engine_flush_record(br_ssl_engine_context *cc) { if (cc->hbuf_out != cc->saved_hbuf_out) { sendpld_ack(cc, cc->hbuf_out - cc->saved_hbuf_out); } if (br_ssl_engine_has_pld_to_send(cc)) { sendpld_flush(cc, 0); } cc->saved_hbuf_out = cc->hbuf_out = sendpld_buf(cc, &cc->hlen_out); } /* see bearssl_ssl.h */ unsigned char * br_ssl_engine_sendapp_buf(const br_ssl_engine_context *cc, size_t *len) { if (!(cc->application_data & 1)) { *len = 0; return NULL; } return sendpld_buf(cc, len); } /* see bearssl_ssl.h */ void br_ssl_engine_sendapp_ack(br_ssl_engine_context *cc, size_t len) { sendpld_ack(cc, len); } /* see bearssl_ssl.h */ unsigned char * br_ssl_engine_recvapp_buf(const br_ssl_engine_context *cc, size_t *len) { if (!(cc->application_data & 1) || cc->record_type_in != BR_SSL_APPLICATION_DATA) { *len = 0; return NULL; } return recvpld_buf(cc, len); } /* see bearssl_ssl.h */ void br_ssl_engine_recvapp_ack(br_ssl_engine_context *cc, size_t len) { recvpld_ack(cc, len); } /* see bearssl_ssl.h */ unsigned char * br_ssl_engine_sendrec_buf(const br_ssl_engine_context *cc, size_t *len) { return sendrec_buf(cc, len); } /* see bearssl_ssl.h */ void br_ssl_engine_sendrec_ack(br_ssl_engine_context *cc, size_t len) { sendrec_ack(cc, len); if (len != 0 && !has_rec_tosend(cc) && (cc->record_type_out != BR_SSL_APPLICATION_DATA || (cc->application_data & 1) == 0)) { jump_handshake(cc, 0); } } /* see bearssl_ssl.h */ unsigned char * br_ssl_engine_recvrec_buf(const br_ssl_engine_context *cc, size_t *len) { return recvrec_buf(cc, len); } /* see bearssl_ssl.h */ void br_ssl_engine_recvrec_ack(br_ssl_engine_context *cc, size_t len) { unsigned char *buf; recvrec_ack(cc, len); if (br_ssl_engine_closed(cc)) { return; } /* * We just received some bytes from the peer. This may have * yielded some payload bytes, in which case we must process * them according to the record type. */ buf = recvpld_buf(cc, &len); if (buf != NULL) { switch (cc->record_type_in) { case BR_SSL_CHANGE_CIPHER_SPEC: case BR_SSL_ALERT: case BR_SSL_HANDSHAKE: jump_handshake(cc, 0); break; case BR_SSL_APPLICATION_DATA: if (cc->application_data == 1) { break; } /* * If we are currently closing, and waiting for * a close_notify from the peer, then incoming * application data should be discarded. */ if (cc->application_data == 2) { recvpld_ack(cc, len); break; } /* Fall through */ default: br_ssl_engine_fail(cc, BR_ERR_UNEXPECTED); break; } } } /* see bearssl_ssl.h */ void br_ssl_engine_close(br_ssl_engine_context *cc) { if (!br_ssl_engine_closed(cc)) { /* * If we are not already closed, then we need to * initiate the closure. Once closing, any incoming * application data is discarded; we should also discard * application data which is already there but has not * been acknowledged by the application yet (this mimics * usual semantics on BSD sockets: you cannot read() * once you called close(), even if there was some * unread data already buffered). */ size_t len; if (br_ssl_engine_recvapp_buf(cc, &len) != NULL && len != 0) { br_ssl_engine_recvapp_ack(cc, len); } jump_handshake(cc, 1); } } /* see bearssl_ssl.h */ int br_ssl_engine_renegotiate(br_ssl_engine_context *cc) { size_t len; if (br_ssl_engine_closed(cc) || cc->reneg == 1 || (cc->flags & BR_OPT_NO_RENEGOTIATION) != 0 || br_ssl_engine_recvapp_buf(cc, &len) != NULL) { return 0; } jump_handshake(cc, 2); return 1; } /* see bearssl.h */ unsigned br_ssl_engine_current_state(const br_ssl_engine_context *cc) { unsigned s; size_t len; if (br_ssl_engine_closed(cc)) { return BR_SSL_CLOSED; } s = 0; if (br_ssl_engine_sendrec_buf(cc, &len) != NULL) { s |= BR_SSL_SENDREC; } if (br_ssl_engine_recvrec_buf(cc, &len) != NULL) { s |= BR_SSL_RECVREC; } if (br_ssl_engine_sendapp_buf(cc, &len) != NULL) { s |= BR_SSL_SENDAPP; } if (br_ssl_engine_recvapp_buf(cc, &len) != NULL) { s |= BR_SSL_RECVAPP; } return s; } /* see bearssl_ssl.h */ void br_ssl_engine_flush(br_ssl_engine_context *cc, int force) { if (!br_ssl_engine_closed(cc) && (cc->application_data & 1) != 0) { sendpld_flush(cc, force); } } /* see inner.h */ void br_ssl_engine_hs_reset(br_ssl_engine_context *cc, void (*hsinit)(void *), void (*hsrun)(void *)) { engine_clearbuf(cc); cc->cpu.dp = cc->dp_stack; cc->cpu.rp = cc->rp_stack; hsinit(&cc->cpu); cc->hsrun = hsrun; cc->shutdown_recv = 0; cc->application_data = 0; cc->alert = 0; jump_handshake(cc, 0); } /* see inner.h */ br_tls_prf_impl br_ssl_engine_get_PRF(br_ssl_engine_context *cc, int prf_id) { if (cc->session.version >= BR_TLS12) { if (prf_id == br_sha384_ID) { return cc->prf_sha384; } else { return cc->prf_sha256; } } else { return cc->prf10; } } /* see inner.h */ void br_ssl_engine_compute_master(br_ssl_engine_context *cc, int prf_id, const void *pms, size_t pms_len) { br_tls_prf_impl iprf; br_tls_prf_seed_chunk seed[2] = { { cc->client_random, sizeof cc->client_random }, { cc->server_random, sizeof cc->server_random } }; iprf = br_ssl_engine_get_PRF(cc, prf_id); iprf(cc->session.master_secret, sizeof cc->session.master_secret, pms, pms_len, "master secret", 2, seed); } /* * Compute key block. */ static void compute_key_block(br_ssl_engine_context *cc, int prf_id, size_t half_len, unsigned char *kb) { br_tls_prf_impl iprf; br_tls_prf_seed_chunk seed[2] = { { cc->server_random, sizeof cc->server_random }, { cc->client_random, sizeof cc->client_random } }; iprf = br_ssl_engine_get_PRF(cc, prf_id); iprf(kb, half_len << 1, cc->session.master_secret, sizeof cc->session.master_secret, "key expansion", 2, seed); } /* see inner.h */ void br_ssl_engine_switch_cbc_in(br_ssl_engine_context *cc, int is_client, int prf_id, int mac_id, const br_block_cbcdec_class *bc_impl, size_t cipher_key_len) { unsigned char kb[192]; unsigned char *cipher_key, *mac_key, *iv; const br_hash_class *imh; size_t mac_key_len, mac_out_len, iv_len; imh = br_ssl_engine_get_hash(cc, mac_id); mac_out_len = (imh->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; mac_key_len = mac_out_len; /* * TLS 1.1+ uses per-record explicit IV, so no IV to generate here. */ if (cc->session.version >= BR_TLS11) { iv_len = 0; } else { iv_len = bc_impl->block_size; } compute_key_block(cc, prf_id, mac_key_len + cipher_key_len + iv_len, kb); if (is_client) { mac_key = &kb[mac_key_len]; cipher_key = &kb[(mac_key_len << 1) + cipher_key_len]; iv = &kb[((mac_key_len + cipher_key_len) << 1) + iv_len]; } else { mac_key = &kb[0]; cipher_key = &kb[mac_key_len << 1]; iv = &kb[(mac_key_len + cipher_key_len) << 1]; } if (iv_len == 0) { iv = NULL; } cc->icbc_in->init(&cc->in.cbc.vtable, bc_impl, cipher_key, cipher_key_len, imh, mac_key, mac_key_len, mac_out_len, iv); cc->incrypt = 1; } /* see inner.h */ void br_ssl_engine_switch_cbc_out(br_ssl_engine_context *cc, int is_client, int prf_id, int mac_id, const br_block_cbcenc_class *bc_impl, size_t cipher_key_len) { unsigned char kb[192]; unsigned char *cipher_key, *mac_key, *iv; const br_hash_class *imh; size_t mac_key_len, mac_out_len, iv_len; imh = br_ssl_engine_get_hash(cc, mac_id); mac_out_len = (imh->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; mac_key_len = mac_out_len; /* * TLS 1.1+ uses per-record explicit IV, so no IV to generate here. */ if (cc->session.version >= BR_TLS11) { iv_len = 0; } else { iv_len = bc_impl->block_size; } compute_key_block(cc, prf_id, mac_key_len + cipher_key_len + iv_len, kb); if (is_client) { mac_key = &kb[0]; cipher_key = &kb[mac_key_len << 1]; iv = &kb[(mac_key_len + cipher_key_len) << 1]; } else { mac_key = &kb[mac_key_len]; cipher_key = &kb[(mac_key_len << 1) + cipher_key_len]; iv = &kb[((mac_key_len + cipher_key_len) << 1) + iv_len]; } if (iv_len == 0) { iv = NULL; } cc->icbc_out->init(&cc->out.cbc.vtable, bc_impl, cipher_key, cipher_key_len, imh, mac_key, mac_key_len, mac_out_len, iv); } /* see inner.h */ void br_ssl_engine_switch_gcm_in(br_ssl_engine_context *cc, int is_client, int prf_id, const br_block_ctr_class *bc_impl, size_t cipher_key_len) { unsigned char kb[72]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, cipher_key_len + 4, kb); if (is_client) { cipher_key = &kb[cipher_key_len]; iv = &kb[(cipher_key_len << 1) + 4]; } else { cipher_key = &kb[0]; iv = &kb[cipher_key_len << 1]; } cc->igcm_in->init(&cc->in.gcm.vtable.in, bc_impl, cipher_key, cipher_key_len, cc->ighash, iv); cc->incrypt = 1; } /* see inner.h */ void br_ssl_engine_switch_gcm_out(br_ssl_engine_context *cc, int is_client, int prf_id, const br_block_ctr_class *bc_impl, size_t cipher_key_len) { unsigned char kb[72]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, cipher_key_len + 4, kb); if (is_client) { cipher_key = &kb[0]; iv = &kb[cipher_key_len << 1]; } else { cipher_key = &kb[cipher_key_len]; iv = &kb[(cipher_key_len << 1) + 4]; } cc->igcm_out->init(&cc->out.gcm.vtable.out, bc_impl, cipher_key, cipher_key_len, cc->ighash, iv); } /* see inner.h */ void br_ssl_engine_switch_chapol_in(br_ssl_engine_context *cc, int is_client, int prf_id) { unsigned char kb[88]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, 44, kb); if (is_client) { cipher_key = &kb[32]; iv = &kb[76]; } else { cipher_key = &kb[0]; iv = &kb[64]; } cc->ichapol_in->init(&cc->in.chapol.vtable.in, cc->ichacha, cc->ipoly, cipher_key, iv); cc->incrypt = 1; } /* see inner.h */ void br_ssl_engine_switch_chapol_out(br_ssl_engine_context *cc, int is_client, int prf_id) { unsigned char kb[88]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, 44, kb); if (is_client) { cipher_key = &kb[0]; iv = &kb[64]; } else { cipher_key = &kb[32]; iv = &kb[76]; } cc->ichapol_out->init(&cc->out.chapol.vtable.out, cc->ichacha, cc->ipoly, cipher_key, iv); } /* see inner.h */ void br_ssl_engine_switch_ccm_in(br_ssl_engine_context *cc, int is_client, int prf_id, const br_block_ctrcbc_class *bc_impl, size_t cipher_key_len, size_t tag_len) { unsigned char kb[72]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, cipher_key_len + 4, kb); if (is_client) { cipher_key = &kb[cipher_key_len]; iv = &kb[(cipher_key_len << 1) + 4]; } else { cipher_key = &kb[0]; iv = &kb[cipher_key_len << 1]; } cc->iccm_in->init(&cc->in.ccm.vtable.in, bc_impl, cipher_key, cipher_key_len, iv, tag_len); cc->incrypt = 1; } /* see inner.h */ void br_ssl_engine_switch_ccm_out(br_ssl_engine_context *cc, int is_client, int prf_id, const br_block_ctrcbc_class *bc_impl, size_t cipher_key_len, size_t tag_len) { unsigned char kb[72]; unsigned char *cipher_key, *iv; compute_key_block(cc, prf_id, cipher_key_len + 4, kb); if (is_client) { cipher_key = &kb[0]; iv = &kb[cipher_key_len << 1]; } else { cipher_key = &kb[cipher_key_len]; iv = &kb[(cipher_key_len << 1) + 4]; } cc->iccm_out->init(&cc->out.ccm.vtable.out, bc_impl, cipher_key, cipher_key_len, iv, tag_len); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_aes_cbc(br_ssl_engine_context *cc) { #if BR_AES_X86NI || BR_POWER8 const br_block_cbcenc_class *ienc; const br_block_cbcdec_class *idec; #endif br_ssl_engine_set_cbc(cc, &br_sslrec_in_cbc_vtable, &br_sslrec_out_cbc_vtable); #if BR_AES_X86NI ienc = br_aes_x86ni_cbcenc_get_vtable(); idec = br_aes_x86ni_cbcdec_get_vtable(); if (ienc != NULL && idec != NULL) { br_ssl_engine_set_aes_cbc(cc, ienc, idec); return; } #endif #if BR_POWER8 ienc = br_aes_pwr8_cbcenc_get_vtable(); idec = br_aes_pwr8_cbcdec_get_vtable(); if (ienc != NULL && idec != NULL) { br_ssl_engine_set_aes_cbc(cc, ienc, idec); return; } #endif #if BR_64 br_ssl_engine_set_aes_cbc(cc, &br_aes_ct64_cbcenc_vtable, &br_aes_ct64_cbcdec_vtable); #else br_ssl_engine_set_aes_cbc(cc, &br_aes_ct_cbcenc_vtable, &br_aes_ct_cbcdec_vtable); #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_aes_ccm(br_ssl_engine_context *cc) { #if BR_AES_X86NI || BR_POWER8 const br_block_ctrcbc_class *ictrcbc; #endif br_ssl_engine_set_ccm(cc, &br_sslrec_in_ccm_vtable, &br_sslrec_out_ccm_vtable); #if BR_AES_X86NI ictrcbc = br_aes_x86ni_ctrcbc_get_vtable(); if (ictrcbc != NULL) { br_ssl_engine_set_aes_ctrcbc(cc, ictrcbc); } else { #if BR_64 br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct64_ctrcbc_vtable); #else br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct_ctrcbc_vtable); #endif } #elif BR_POWER8 ictrcbc = br_aes_pwr8_ctrcbc_get_vtable(); if (ictrcbc != NULL) { br_ssl_engine_set_aes_ctrcbc(cc, ictrcbc); } else { #if BR_64 br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct64_ctrcbc_vtable); #else br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct_ctrcbc_vtable); #endif } #else #if BR_64 br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct64_ctrcbc_vtable); #else br_ssl_engine_set_aes_ctrcbc(cc, &br_aes_ct_ctrcbc_vtable); #endif #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_aes_gcm(br_ssl_engine_context *cc) { #if BR_AES_X86NI || BR_POWER8 const br_block_ctr_class *ictr; br_ghash ighash; #endif br_ssl_engine_set_gcm(cc, &br_sslrec_in_gcm_vtable, &br_sslrec_out_gcm_vtable); #if BR_AES_X86NI ictr = br_aes_x86ni_ctr_get_vtable(); if (ictr != NULL) { br_ssl_engine_set_aes_ctr(cc, ictr); } else { #if BR_64 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable); #else br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable); #endif } #elif BR_POWER8 ictr = br_aes_pwr8_ctr_get_vtable(); if (ictr != NULL) { br_ssl_engine_set_aes_ctr(cc, ictr); } else { #if BR_64 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable); #else br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable); #endif } #else #if BR_64 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable); #else br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable); #endif #endif #if BR_AES_X86NI ighash = br_ghash_pclmul_get(); if (ighash != 0) { br_ssl_engine_set_ghash(cc, ighash); return; } #endif #if BR_POWER8 ighash = br_ghash_pwr8_get(); if (ighash != 0) { br_ssl_engine_set_ghash(cc, ighash); return; } #endif #if BR_LOMUL br_ssl_engine_set_ghash(cc, &br_ghash_ctmul32); #elif BR_64 br_ssl_engine_set_ghash(cc, &br_ghash_ctmul64); #else br_ssl_engine_set_ghash(cc, &br_ghash_ctmul); #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_chapol(br_ssl_engine_context *cc) { #if BR_INT128 || BR_UMUL128 br_poly1305_run bp; #endif #if BR_SSE2 br_chacha20_run bc; #endif br_ssl_engine_set_chapol(cc, &br_sslrec_in_chapol_vtable, &br_sslrec_out_chapol_vtable); #if BR_SSE2 bc = br_chacha20_sse2_get(); if (bc) { br_ssl_engine_set_chacha20(cc, bc); } else { #endif br_ssl_engine_set_chacha20(cc, &br_chacha20_ct_run); #if BR_SSE2 } #endif #if BR_INT128 || BR_UMUL128 bp = br_poly1305_ctmulq_get(); if (bp) { br_ssl_engine_set_poly1305(cc, bp); } else { #endif #if BR_LOMUL br_ssl_engine_set_poly1305(cc, &br_poly1305_ctmul32_run); #else br_ssl_engine_set_poly1305(cc, &br_poly1305_ctmul_run); #endif #if BR_INT128 || BR_UMUL128 } #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_des_cbc(br_ssl_engine_context *cc) { br_ssl_engine_set_cbc(cc, &br_sslrec_in_cbc_vtable, &br_sslrec_out_cbc_vtable); br_ssl_engine_set_des_cbc(cc, &br_des_ct_cbcenc_vtable, &br_des_ct_cbcdec_vtable); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_ec(br_ssl_engine_context *cc) { #if BR_LOMUL br_ssl_engine_set_ec(cc, &br_ec_all_m15); #else br_ssl_engine_set_ec(cc, &br_ec_all_m31); #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_ecdsa(br_ssl_engine_context *cc) { #if BR_LOMUL br_ssl_engine_set_ec(cc, &br_ec_all_m15); br_ssl_engine_set_ecdsa(cc, &br_ecdsa_i15_vrfy_asn1); #else br_ssl_engine_set_ec(cc, &br_ec_all_m31); br_ssl_engine_set_ecdsa(cc, &br_ecdsa_i31_vrfy_asn1); #endif } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_engine_set_default_rsavrfy(br_ssl_engine_context *cc) { br_ssl_engine_set_rsavrfy(cc, br_rsa_pkcs1_vrfy_get_default()); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ int br_ssl_choose_hash(unsigned bf) { static const unsigned char pref[] = { br_sha256_ID, br_sha384_ID, br_sha512_ID, br_sha224_ID, br_sha1_ID }; size_t u; for (u = 0; u < sizeof pref; u ++) { int x; x = pref[u]; if ((bf >> x) & 1) { return x; } } return 0; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_ssl_ssl_hs_client_ct0_context; static uint32_t _src_ssl_ssl_hs_client_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_ssl_ssl_hs_client_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char t0_datablock[]; */ void br_ssl_hs_client_init_main(void *t0ctx); void br_ssl_hs_client_run(void *t0ctx); #include #include /* * This macro evaluates to a pointer to the current engine context. */ #define ENG ((br_ssl_engine_context *)(void *)((unsigned char *)t0ctx - offsetof(br_ssl_engine_context, cpu))) /* * This macro evaluates to a pointer to the client context, under that * specific name. It must be noted that since the engine context is the * first field of the br_ssl_client_context structure ('eng'), then * pointers values of both types are interchangeable, modulo an * appropriate cast. This also means that "addresses" computed as offsets * within the structure work for both kinds of context. */ #define _src_ssl_ssl_hs_client_cCTX ((br_ssl_client_context *)ENG) /* * Generate the pre-master secret for RSA key exchange, and encrypt it * with the server's public key. Returned value is either the encrypted * data length (in bytes), or -x on error, with 'x' being an error code. * * This code assumes that the public key has been already verified (it * was properly obtained by the X.509 engine, and it has the right type, * i.e. it is of type RSA and suitable for encryption). */ static int make_pms_rsa(br_ssl_client_context *ctx, int prf_id) { const br_x509_class **xc; const br_x509_pkey *pk; const unsigned char *n; unsigned char *pms; size_t nlen, u; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); /* * Compute actual RSA key length, in case there are leading zeros. */ n = pk->key.rsa.n; nlen = pk->key.rsa.nlen; while (nlen > 0 && *n == 0) { n ++; nlen --; } /* * We need at least 59 bytes (48 bytes for pre-master secret, and * 11 bytes for the PKCS#1 type 2 padding). Note that the X.509 * minimal engine normally blocks RSA keys shorter than 128 bytes, * so this is mostly for public keys provided explicitly by the * caller. */ if (nlen < 59) { return -BR_ERR_X509_WEAK_PUBLIC_KEY; } if (nlen > sizeof ctx->eng.pad) { return -BR_ERR_LIMIT_EXCEEDED; } /* * Make PMS. */ pms = ctx->eng.pad + nlen - 48; br_enc16be(pms, ctx->eng.version_max); br_hmac_drbg_generate(&ctx->eng.rng, pms + 2, 46); br_ssl_engine_compute_master(&ctx->eng, prf_id, pms, 48); /* * Apply PKCS#1 type 2 padding. */ ctx->eng.pad[0] = 0x00; ctx->eng.pad[1] = 0x02; ctx->eng.pad[nlen - 49] = 0x00; br_hmac_drbg_generate(&ctx->eng.rng, ctx->eng.pad + 2, nlen - 51); for (u = 2; u < nlen - 49; u ++) { while (ctx->eng.pad[u] == 0) { br_hmac_drbg_generate(&ctx->eng.rng, &ctx->eng.pad[u], 1); } } /* * Compute RSA encryption. */ if (!ctx->irsapub(ctx->eng.pad, nlen, &pk->key.rsa)) { return -BR_ERR_LIMIT_EXCEEDED; } return (int)nlen; } /* * OID for hash functions in RSA signatures. */ static const unsigned char *_src_ssl_ssl_hs_client_cHASH_OID[] = { BR_HASH_OID_SHA1, BR_HASH_OID_SHA224, BR_HASH_OID_SHA256, BR_HASH_OID_SHA384, BR_HASH_OID_SHA512 }; /* * Check the RSA signature on the ServerKeyExchange message. * * hash hash function ID (2 to 6), or 0 for MD5+SHA-1 (with RSA only) * use_rsa non-zero for RSA signature, zero for ECDSA * sig_len signature length (in bytes); signature value is in the pad * * Returned value is 0 on success, or an error code. */ static int verify_SKE_sig(br_ssl_client_context *ctx, int hash, int use_rsa, size_t sig_len) { const br_x509_class **xc; const br_x509_pkey *pk; br_multihash_context mhc; unsigned char hv[64], head[4]; size_t hv_len; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); br_multihash_zero(&mhc); br_multihash_copyimpl(&mhc, &ctx->eng.mhash); br_multihash_init(&mhc); br_multihash_update(&mhc, ctx->eng.client_random, sizeof ctx->eng.client_random); br_multihash_update(&mhc, ctx->eng.server_random, sizeof ctx->eng.server_random); head[0] = 3; head[1] = 0; head[2] = ctx->eng.ecdhe_curve; head[3] = ctx->eng.ecdhe_point_len; br_multihash_update(&mhc, head, sizeof head); br_multihash_update(&mhc, ctx->eng.ecdhe_point, ctx->eng.ecdhe_point_len); if (hash) { hv_len = br_multihash_out(&mhc, hash, hv); if (hv_len == 0) { return BR_ERR_INVALID_ALGORITHM; } } else { if (!br_multihash_out(&mhc, br_md5_ID, hv) || !br_multihash_out(&mhc, br_sha1_ID, hv + 16)) { return BR_ERR_INVALID_ALGORITHM; } hv_len = 36; } if (use_rsa) { unsigned char tmp[64]; const unsigned char *hash_oid; if (hash) { hash_oid = _src_ssl_ssl_hs_client_cHASH_OID[hash - 2]; } else { hash_oid = NULL; } if (!ctx->eng.irsavrfy(ctx->eng.pad, sig_len, hash_oid, hv_len, &pk->key.rsa, tmp) || memcmp(tmp, hv, hv_len) != 0) { return BR_ERR_BAD_SIGNATURE; } } else { if (!ctx->eng.iecdsa(ctx->eng.iec, hv, hv_len, &pk->key.ec, ctx->eng.pad, sig_len)) { return BR_ERR_BAD_SIGNATURE; } } return 0; } /* * Perform client-side ECDH (or ECDHE). The point that should be sent to * the server is written in the pad; returned value is either the point * length (in bytes), or -x on error, with 'x' being an error code. * * The point _from_ the server is taken from ecdhe_point[] if 'ecdhe' * is non-zero, or from the X.509 engine context if 'ecdhe' is zero * (for static ECDH). */ static int make_pms_ecdh(br_ssl_client_context *ctx, unsigned ecdhe, int prf_id) { int curve; unsigned char key[66], point[133]; const unsigned char *order, *point_src; size_t glen, olen, point_len, xoff, xlen; unsigned char mask; if (ecdhe) { curve = ctx->eng.ecdhe_curve; point_src = ctx->eng.ecdhe_point; point_len = ctx->eng.ecdhe_point_len; } else { const br_x509_class **xc; const br_x509_pkey *pk; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); curve = pk->key.ec.curve; point_src = pk->key.ec.q; point_len = pk->key.ec.qlen; } if ((ctx->eng.iec->supported_curves & ((uint32_t)1 << curve)) == 0) { return -BR_ERR_INVALID_ALGORITHM; } /* * We need to generate our key, as a non-zero random value which * is lower than the curve order, in a "large enough" range. We * force top bit to 0 and bottom bit to 1, which guarantees that * the value is in the proper range. */ order = ctx->eng.iec->order(curve, &olen); mask = 0xFF; while (mask >= order[0]) { mask >>= 1; } br_hmac_drbg_generate(&ctx->eng.rng, key, olen); key[0] &= mask; key[olen - 1] |= 0x01; /* * Compute the common ECDH point, whose X coordinate is the * pre-master secret. */ ctx->eng.iec->generator(curve, &glen); if (glen != point_len) { return -BR_ERR_INVALID_ALGORITHM; } memcpy(point, point_src, glen); if (!ctx->eng.iec->mul(point, glen, key, olen, curve)) { return -BR_ERR_INVALID_ALGORITHM; } /* * The pre-master secret is the X coordinate. */ xoff = ctx->eng.iec->xoff(curve, &xlen); br_ssl_engine_compute_master(&ctx->eng, prf_id, point + xoff, xlen); ctx->eng.iec->mulgen(point, key, olen, curve); memcpy(ctx->eng.pad, point, glen); return (int)glen; } /* * Perform full static ECDH. This occurs only in the context of client * authentication with certificates: the server uses an EC public key, * the cipher suite is of type ECDH (not ECDHE), the server requested a * client certificate and accepts static ECDH, the client has a * certificate with an EC public key in the same curve, and accepts * static ECDH as well. * * Returned value is 0 on success, -1 on error. */ static int make_pms_static_ecdh(br_ssl_client_context *ctx, int prf_id) { unsigned char point[133]; size_t point_len; const br_x509_class **xc; const br_x509_pkey *pk; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); point_len = pk->key.ec.qlen; if (point_len > sizeof point) { return -1; } memcpy(point, pk->key.ec.q, point_len); if (!(*ctx->client_auth_vtable)->do_keyx( ctx->client_auth_vtable, point, &point_len)) { return -1; } br_ssl_engine_compute_master(&ctx->eng, prf_id, point, point_len); return 0; } /* * Compute the client-side signature. This is invoked only when a * signature-based client authentication was selected. The computed * signature is in the pad; its length (in bytes) is returned. On * error, 0 is returned. */ static size_t make_client_sign(br_ssl_client_context *ctx) { size_t hv_len; /* * Compute hash of handshake messages so far. This "cannot" fail * because the list of supported hash functions provided to the * client certificate handler was trimmed to include only the * hash functions that the multi-hasher supports. */ if (ctx->hash_id) { hv_len = br_multihash_out(&ctx->eng.mhash, ctx->hash_id, ctx->eng.pad); } else { br_multihash_out(&ctx->eng.mhash, br_md5_ID, ctx->eng.pad); br_multihash_out(&ctx->eng.mhash, br_sha1_ID, ctx->eng.pad + 16); hv_len = 36; } return (*ctx->client_auth_vtable)->do_sign( ctx->client_auth_vtable, ctx->hash_id, hv_len, ctx->eng.pad, sizeof ctx->eng.pad); } static const unsigned char t0_datablock[] = { 0x00, 0x00, 0x0A, 0x00, 0x24, 0x00, 0x2F, 0x01, 0x24, 0x00, 0x35, 0x02, 0x24, 0x00, 0x3C, 0x01, 0x44, 0x00, 0x3D, 0x02, 0x44, 0x00, 0x9C, 0x03, 0x04, 0x00, 0x9D, 0x04, 0x05, 0xC0, 0x03, 0x40, 0x24, 0xC0, 0x04, 0x41, 0x24, 0xC0, 0x05, 0x42, 0x24, 0xC0, 0x08, 0x20, 0x24, 0xC0, 0x09, 0x21, 0x24, 0xC0, 0x0A, 0x22, 0x24, 0xC0, 0x0D, 0x30, 0x24, 0xC0, 0x0E, 0x31, 0x24, 0xC0, 0x0F, 0x32, 0x24, 0xC0, 0x12, 0x10, 0x24, 0xC0, 0x13, 0x11, 0x24, 0xC0, 0x14, 0x12, 0x24, 0xC0, 0x23, 0x21, 0x44, 0xC0, 0x24, 0x22, 0x55, 0xC0, 0x25, 0x41, 0x44, 0xC0, 0x26, 0x42, 0x55, 0xC0, 0x27, 0x11, 0x44, 0xC0, 0x28, 0x12, 0x55, 0xC0, 0x29, 0x31, 0x44, 0xC0, 0x2A, 0x32, 0x55, 0xC0, 0x2B, 0x23, 0x04, 0xC0, 0x2C, 0x24, 0x05, 0xC0, 0x2D, 0x43, 0x04, 0xC0, 0x2E, 0x44, 0x05, 0xC0, 0x2F, 0x13, 0x04, 0xC0, 0x30, 0x14, 0x05, 0xC0, 0x31, 0x33, 0x04, 0xC0, 0x32, 0x34, 0x05, 0xC0, 0x9C, 0x06, 0x04, 0xC0, 0x9D, 0x07, 0x04, 0xC0, 0xA0, 0x08, 0x04, 0xC0, 0xA1, 0x09, 0x04, 0xC0, 0xAC, 0x26, 0x04, 0xC0, 0xAD, 0x27, 0x04, 0xC0, 0xAE, 0x28, 0x04, 0xC0, 0xAF, 0x29, 0x04, 0xCC, 0xA8, 0x15, 0x04, 0xCC, 0xA9, 0x25, 0x04, 0x00, 0x00 }; static const unsigned char t0_codeblock[] = { 0x00, 0x01, 0x00, 0x0A, 0x00, 0x00, 0x01, 0x00, 0x0D, 0x00, 0x00, 0x01, 0x00, 0x0E, 0x00, 0x00, 0x01, 0x00, 0x0F, 0x00, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x01, 0x01, 0x09, 0x00, 0x00, 0x01, 0x02, 0x08, 0x00, 0x00, 0x01, 0x02, 0x09, 0x00, 0x00, 0x25, 0x25, 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_CCS), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_CIPHER_SUITE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_COMPRESSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_FINISHED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_FRAGLEN), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_HANDSHAKE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_HELLO_DONE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_PARAM), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_SECRENEG), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_SNI), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_VERSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_EXTRA_EXTENSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_INVALID_ALGORITHM), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_LIMIT_EXCEEDED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_OK), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_OVERSIZED_ID), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_RESUME_MISMATCH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_UNEXPECTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_UNSUPPORTED_VERSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_WRONG_KEY_USAGE), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, action)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, alert)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, application_data)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_client_context, auth_type)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, cipher_suite)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, client_random)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, close_received)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, ecdhe_curve)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, ecdhe_point)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, ecdhe_point_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, flags)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_client_context, hash_id)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_client_context, hashes)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, log_max_frag_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_client_context, min_clienthello_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, pad)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, protocol_names_num)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, record_type_in)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, record_type_out)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, reneg)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, saved_finished)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, selected_protocol)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, server_name)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, server_random)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, session_id)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, session_id_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, shutdown_recv)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, suites_buf)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, suites_num)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, version)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_in)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_max)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_min)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_out)), 0x00, 0x00, 0x09, 0x26, 0x58, 0x06, 0x02, 0x68, 0x28, 0x00, 0x00, 0x06, 0x08, 0x2C, 0x0E, 0x05, 0x02, 0x71, 0x28, 0x04, 0x01, 0x3C, 0x00, 0x00, 0x01, 0x01, 0x00, 0x01, 0x03, 0x00, 0x99, 0x26, 0x5E, 0x44, 0x9D, 0x26, 0x05, 0x04, 0x60, 0x01, 0x00, 0x00, 0x02, 0x00, 0x0E, 0x06, 0x02, 0x9D, 0x00, 0x5E, 0x04, 0x6B, 0x00, 0x06, 0x02, 0x68, 0x28, 0x00, 0x00, 0x26, 0x89, 0x44, 0x05, 0x03, 0x01, 0x0C, 0x08, 0x44, 0x79, 0x2C, 0xAB, 0x1C, 0x84, 0x01, 0x0C, 0x31, 0x00, 0x00, 0x26, 0x1F, 0x01, 0x08, 0x0B, 0x44, 0x5C, 0x1F, 0x08, 0x00, 0x01, 0x03, 0x00, 0x77, 0x2E, 0x02, 0x00, 0x36, 0x17, 0x01, 0x01, 0x0B, 0x77, 0x3E, 0x29, 0x1A, 0x36, 0x06, 0x07, 0x02, 0x00, 0xCF, 0x03, 0x00, 0x04, 0x75, 0x01, 0x00, 0xC5, 0x02, 0x00, 0x26, 0x1A, 0x17, 0x06, 0x02, 0x6F, 0x28, 0xCF, 0x04, 0x76, 0x01, 0x01, 0x00, 0x77, 0x3E, 0x01, 0x16, 0x87, 0x3E, 0x01, 0x00, 0x8A, 0x3C, 0x34, 0xD5, 0x29, 0xB4, 0x06, 0x09, 0x01, 0x7F, 0xAF, 0x01, 0x7F, 0xD2, 0x04, 0x80, 0x53, 0xB1, 0x79, 0x2C, 0xA1, 0x01, T0_INT1(BR_KEYTYPE_SIGN), 0x17, 0x06, 0x01, 0xB5, 0xB8, 0x26, 0x01, 0x0D, 0x0E, 0x06, 0x07, 0x25, 0xB7, 0xB8, 0x01, 0x7F, 0x04, 0x02, 0x01, 0x00, 0x03, 0x00, 0x01, 0x0E, 0x0E, 0x05, 0x02, 0x72, 0x28, 0x06, 0x02, 0x67, 0x28, 0x33, 0x06, 0x02, 0x72, 0x28, 0x02, 0x00, 0x06, 0x1C, 0xD3, 0x80, 0x2E, 0x01, 0x81, 0x7F, 0x0E, 0x06, 0x0D, 0x25, 0x01, 0x10, 0xDE, 0x01, 0x00, 0xDD, 0x79, 0x2C, 0xAB, 0x24, 0x04, 0x04, 0xD6, 0x06, 0x01, 0xD4, 0x04, 0x01, 0xD6, 0x01, 0x7F, 0xD2, 0x01, 0x7F, 0xAF, 0x01, 0x01, 0x77, 0x3E, 0x01, 0x17, 0x87, 0x3E, 0x00, 0x00, 0x38, 0x38, 0x00, 0x00, 0x9A, 0x01, 0x0C, 0x11, 0x01, 0x00, 0x38, 0x0E, 0x06, 0x05, 0x25, 0x01, T0_INT1(BR_KEYTYPE_RSA | BR_KEYTYPE_KEYX), 0x04, 0x30, 0x01, 0x01, 0x38, 0x0E, 0x06, 0x05, 0x25, 0x01, T0_INT1(BR_KEYTYPE_RSA | BR_KEYTYPE_SIGN), 0x04, 0x25, 0x01, 0x02, 0x38, 0x0E, 0x06, 0x05, 0x25, 0x01, T0_INT1(BR_KEYTYPE_EC | BR_KEYTYPE_SIGN), 0x04, 0x1A, 0x01, 0x03, 0x38, 0x0E, 0x06, 0x05, 0x25, 0x01, T0_INT1(BR_KEYTYPE_EC | BR_KEYTYPE_KEYX), 0x04, 0x0F, 0x01, 0x04, 0x38, 0x0E, 0x06, 0x05, 0x25, 0x01, T0_INT1(BR_KEYTYPE_EC | BR_KEYTYPE_KEYX), 0x04, 0x04, 0x01, 0x00, 0x44, 0x25, 0x00, 0x00, 0x82, 0x2E, 0x01, 0x0E, 0x0E, 0x06, 0x04, 0x01, 0x00, 0x04, 0x02, 0x01, 0x05, 0x00, 0x00, 0x40, 0x06, 0x04, 0x01, 0x06, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x88, 0x2E, 0x26, 0x06, 0x08, 0x01, 0x01, 0x09, 0x01, 0x11, 0x07, 0x04, 0x03, 0x25, 0x01, 0x05, 0x00, 0x01, 0x41, 0x03, 0x00, 0x25, 0x01, 0x00, 0x43, 0x06, 0x03, 0x02, 0x00, 0x08, 0x42, 0x06, 0x03, 0x02, 0x00, 0x08, 0x26, 0x06, 0x06, 0x01, 0x01, 0x0B, 0x01, 0x06, 0x08, 0x00, 0x00, 0x8B, 0x3F, 0x26, 0x06, 0x03, 0x01, 0x09, 0x08, 0x00, 0x01, 0x40, 0x26, 0x06, 0x1E, 0x01, 0x00, 0x03, 0x00, 0x26, 0x06, 0x0E, 0x26, 0x01, 0x01, 0x17, 0x02, 0x00, 0x08, 0x03, 0x00, 0x01, 0x01, 0x11, 0x04, 0x6F, 0x25, 0x02, 0x00, 0x01, 0x01, 0x0B, 0x01, 0x06, 0x08, 0x00, 0x00, 0x7F, 0x2D, 0x44, 0x11, 0x01, 0x01, 0x17, 0x35, 0x00, 0x00, 0x9F, 0xCE, 0x26, 0x01, 0x07, 0x17, 0x01, 0x00, 0x38, 0x0E, 0x06, 0x09, 0x25, 0x01, 0x10, 0x17, 0x06, 0x01, 0x9F, 0x04, 0x35, 0x01, 0x01, 0x38, 0x0E, 0x06, 0x2C, 0x25, 0x25, 0x01, 0x00, 0x77, 0x3E, 0xB3, 0x88, 0x2E, 0x01, 0x01, 0x0E, 0x01, 0x01, 0xA8, 0x37, 0x06, 0x17, 0x29, 0x1A, 0x36, 0x06, 0x04, 0xCE, 0x25, 0x04, 0x78, 0x01, 0x80, 0x64, 0xC5, 0x01, 0x01, 0x77, 0x3E, 0x01, 0x17, 0x87, 0x3E, 0x04, 0x01, 0x9F, 0x04, 0x03, 0x72, 0x28, 0x25, 0x04, 0xFF, 0x34, 0x01, 0x26, 0x03, 0x00, 0x09, 0x26, 0x58, 0x06, 0x02, 0x68, 0x28, 0x02, 0x00, 0x00, 0x00, 0x9A, 0x01, 0x0F, 0x17, 0x00, 0x00, 0x76, 0x2E, 0x01, 0x00, 0x38, 0x0E, 0x06, 0x10, 0x25, 0x26, 0x01, 0x01, 0x0D, 0x06, 0x03, 0x25, 0x01, 0x02, 0x76, 0x3E, 0x01, 0x00, 0x04, 0x21, 0x01, 0x01, 0x38, 0x0E, 0x06, 0x14, 0x25, 0x01, 0x00, 0x76, 0x3E, 0x26, 0x01, 0x80, 0x64, 0x0E, 0x06, 0x05, 0x01, 0x82, 0x00, 0x08, 0x28, 0x5A, 0x04, 0x07, 0x25, 0x01, 0x82, 0x00, 0x08, 0x28, 0x25, 0x00, 0x00, 0x01, 0x00, 0x2F, 0x06, 0x05, 0x3A, 0xAC, 0x37, 0x04, 0x78, 0x26, 0x06, 0x04, 0x01, 0x01, 0x8F, 0x3E, 0x00, 0x01, 0xBF, 0xAA, 0xBF, 0xAA, 0xC1, 0x84, 0x44, 0x26, 0x03, 0x00, 0xB6, 0x9B, 0x9B, 0x02, 0x00, 0x4D, 0x26, 0x58, 0x06, 0x0A, 0x01, 0x03, 0xA8, 0x06, 0x02, 0x72, 0x28, 0x25, 0x04, 0x03, 0x5C, 0x8A, 0x3C, 0x00, 0x00, 0x2F, 0x06, 0x0B, 0x86, 0x2E, 0x01, 0x14, 0x0D, 0x06, 0x02, 0x72, 0x28, 0x04, 0x11, 0xCE, 0x01, 0x07, 0x17, 0x26, 0x01, 0x02, 0x0D, 0x06, 0x06, 0x06, 0x02, 0x72, 0x28, 0x04, 0x70, 0x25, 0xC2, 0x01, 0x01, 0x0D, 0x33, 0x37, 0x06, 0x02, 0x61, 0x28, 0x26, 0x01, 0x01, 0xC8, 0x36, 0xB2, 0x00, 0x01, 0xB8, 0x01, 0x0B, 0x0E, 0x05, 0x02, 0x72, 0x28, 0x26, 0x01, 0x03, 0x0E, 0x06, 0x08, 0xC0, 0x06, 0x02, 0x68, 0x28, 0x44, 0x25, 0x00, 0x44, 0x57, 0xC0, 0xAA, 0x26, 0x06, 0x23, 0xC0, 0xAA, 0x26, 0x56, 0x26, 0x06, 0x18, 0x26, 0x01, 0x82, 0x00, 0x0F, 0x06, 0x05, 0x01, 0x82, 0x00, 0x04, 0x01, 0x26, 0x03, 0x00, 0x84, 0x02, 0x00, 0xB6, 0x02, 0x00, 0x53, 0x04, 0x65, 0x9B, 0x54, 0x04, 0x5A, 0x9B, 0x9B, 0x55, 0x26, 0x06, 0x02, 0x35, 0x00, 0x25, 0x2B, 0x00, 0x00, 0x79, 0x2C, 0xA1, 0x01, 0x7F, 0xB0, 0x26, 0x58, 0x06, 0x02, 0x35, 0x28, 0x26, 0x05, 0x02, 0x72, 0x28, 0x38, 0x17, 0x0D, 0x06, 0x02, 0x74, 0x28, 0x3B, 0x00, 0x00, 0x9C, 0xB8, 0x01, 0x14, 0x0D, 0x06, 0x02, 0x72, 0x28, 0x84, 0x01, 0x0C, 0x08, 0x01, 0x0C, 0xB6, 0x9B, 0x84, 0x26, 0x01, 0x0C, 0x08, 0x01, 0x0C, 0x30, 0x05, 0x02, 0x64, 0x28, 0x00, 0x00, 0xB9, 0x06, 0x02, 0x72, 0x28, 0x06, 0x02, 0x66, 0x28, 0x00, 0x0A, 0xB8, 0x01, 0x02, 0x0E, 0x05, 0x02, 0x72, 0x28, 0xBF, 0x03, 0x00, 0x02, 0x00, 0x95, 0x2C, 0x0A, 0x02, 0x00, 0x94, 0x2C, 0x0F, 0x37, 0x06, 0x02, 0x73, 0x28, 0x02, 0x00, 0x93, 0x2C, 0x0D, 0x06, 0x02, 0x6B, 0x28, 0x02, 0x00, 0x96, 0x3C, 0x8C, 0x01, 0x20, 0xB6, 0x01, 0x00, 0x03, 0x01, 0xC1, 0x03, 0x02, 0x02, 0x02, 0x01, 0x20, 0x0F, 0x06, 0x02, 0x70, 0x28, 0x84, 0x02, 0x02, 0xB6, 0x02, 0x02, 0x8E, 0x2E, 0x0E, 0x02, 0x02, 0x01, 0x00, 0x0F, 0x17, 0x06, 0x0B, 0x8D, 0x84, 0x02, 0x02, 0x30, 0x06, 0x04, 0x01, 0x7F, 0x03, 0x01, 0x8D, 0x84, 0x02, 0x02, 0x31, 0x02, 0x02, 0x8E, 0x3E, 0x02, 0x00, 0x92, 0x02, 0x01, 0x98, 0xBF, 0x26, 0xC3, 0x58, 0x06, 0x02, 0x62, 0x28, 0x26, 0xCD, 0x02, 0x00, 0x01, 0x86, 0x03, 0x0A, 0x17, 0x06, 0x02, 0x62, 0x28, 0x79, 0x02, 0x01, 0x98, 0xC1, 0x06, 0x02, 0x63, 0x28, 0x26, 0x06, 0x81, 0x47, 0xBF, 0xAA, 0xA6, 0x03, 0x03, 0xA4, 0x03, 0x04, 0xA2, 0x03, 0x05, 0xA5, 0x03, 0x06, 0xA7, 0x03, 0x07, 0xA3, 0x03, 0x08, 0x27, 0x03, 0x09, 0x26, 0x06, 0x81, 0x18, 0xBF, 0x01, 0x00, 0x38, 0x0E, 0x06, 0x0F, 0x25, 0x02, 0x03, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x03, 0xBE, 0x04, 0x80, 0x7F, 0x01, 0x01, 0x38, 0x0E, 0x06, 0x0F, 0x25, 0x02, 0x05, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x05, 0xBC, 0x04, 0x80, 0x6A, 0x01, 0x83, 0xFE, 0x01, 0x38, 0x0E, 0x06, 0x0F, 0x25, 0x02, 0x04, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x04, 0xBD, 0x04, 0x80, 0x53, 0x01, 0x0D, 0x38, 0x0E, 0x06, 0x0E, 0x25, 0x02, 0x06, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x06, 0xBA, 0x04, 0x3F, 0x01, 0x0A, 0x38, 0x0E, 0x06, 0x0E, 0x25, 0x02, 0x07, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x07, 0xBA, 0x04, 0x2B, 0x01, 0x0B, 0x38, 0x0E, 0x06, 0x0E, 0x25, 0x02, 0x08, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x08, 0xBA, 0x04, 0x17, 0x01, 0x10, 0x38, 0x0E, 0x06, 0x0E, 0x25, 0x02, 0x09, 0x05, 0x02, 0x6C, 0x28, 0x01, 0x00, 0x03, 0x09, 0xAE, 0x04, 0x03, 0x6C, 0x28, 0x25, 0x04, 0xFE, 0x64, 0x02, 0x04, 0x06, 0x0D, 0x02, 0x04, 0x01, 0x05, 0x0F, 0x06, 0x02, 0x69, 0x28, 0x01, 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0x26, 0xDC, 0xD8, 0x00, 0x00, 0x26, 0xDE, 0xD8, 0x00, 0x01, 0x03, 0x00, 0x41, 0x25, 0x26, 0x01, 0x10, 0x17, 0x06, 0x06, 0x01, 0x04, 0xDE, 0x02, 0x00, 0xDE, 0x26, 0x01, 0x08, 0x17, 0x06, 0x06, 0x01, 0x03, 0xDE, 0x02, 0x00, 0xDE, 0x26, 0x01, 0x20, 0x17, 0x06, 0x06, 0x01, 0x05, 0xDE, 0x02, 0x00, 0xDE, 0x26, 0x01, 0x80, 0x40, 0x17, 0x06, 0x06, 0x01, 0x06, 0xDE, 0x02, 0x00, 0xDE, 0x01, 0x04, 0x17, 0x06, 0x06, 0x01, 0x02, 0xDE, 0x02, 0x00, 0xDE, 0x00, 0x00, 0x26, 0x01, 0x08, 0x4F, 0xDE, 0xDE, 0x00, 0x00, 0x26, 0x01, 0x10, 0x4F, 0xDE, 0xDC, 0x00, 0x00, 0x26, 0x52, 0x06, 0x02, 0x25, 0x00, 0xCE, 0x25, 0x04, 0x76 }; static const uint16_t _src_ssl_ssl_hs_client_ct0_caddr[] = { 0, 5, 10, 15, 20, 25, 30, 35, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 129, 134, 139, 144, 149, 154, 159, 164, 169, 174, 179, 184, 189, 194, 199, 204, 209, 214, 219, 224, 229, 234, 239, 244, 249, 254, 259, 264, 269, 274, 279, 284, 289, 294, 303, 316, 320, 345, 351, 370, 381, 422, 542, 546, 611, 626, 637, 655, 684, 694, 730, 740, 818, 832, 838, 897, 916, 951, 1000, 1076, 1103, 1134, 1145, 1497, 1644, 1668, 1884, 1898, 1907, 1911, 2006, 2027, 2083, 2090, 2101, 2117, 2123, 2134, 2169, 2181, 2187, 2202, 2218, 2411, 2420, 2433, 2442, 2449, 2459, 2565, 2590, 2603, 2619, 2637, 2669, 2703, 3071, 3107, 3120, 3134, 3139, 3144, 3210, 3218, 3226 }; #define _src_ssl_ssl_hs_client_cT0_INTERPRETED 88 #define _src_ssl_ssl_hs_client_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &t0_codeblock[_src_ssl_ssl_hs_client_ct0_caddr[(slot) - _src_ssl_ssl_hs_client_cT0_INTERPRETED]]; \ t0_lnum = _src_ssl_ssl_hs_client_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &t0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define T0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_ssl_ssl_hs_client_ct0_context *t0ctx =(_src_ssl_ssl_hs_client_ct0_context*)ctx; \ t0ctx->ip = &t0_codeblock[0]; \ _src_ssl_ssl_hs_client_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } T0_DEFENTRY(br_ssl_hs_client_init_main, 169) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_ssl_hs_client_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->dp; rp = ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->rp; ip = ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_ssl_ssl_hs_client_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &t0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_ssl_ssl_hs_client_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_ssl_ssl_hs_client_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_ssl_ssl_hs_client_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_ssl_ssl_hs_client_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_ssl_ssl_hs_client_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_ssl_ssl_hs_client_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* * */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a * b); } break; case 8: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 9: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 10: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 11: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 12: { /* <= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a <= b)); } break; case 13: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 14: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 15: { /* > */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a > b)); } break; case 16: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 17: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 18: { /* anchor-dn-append-name */ size_t len; len = T0_POP(); if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->append_name( _src_ssl_ssl_hs_client_cCTX->client_auth_vtable, ENG->pad, len); } } break; case 19: { /* anchor-dn-end-name */ if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->end_name( _src_ssl_ssl_hs_client_cCTX->client_auth_vtable); } } break; case 20: { /* anchor-dn-end-name-list */ if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->end_name_list( _src_ssl_ssl_hs_client_cCTX->client_auth_vtable); } } break; case 21: { /* anchor-dn-start-name */ size_t len; len = T0_POP(); if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->start_name( _src_ssl_ssl_hs_client_cCTX->client_auth_vtable, len); } } break; case 22: { /* anchor-dn-start-name-list */ if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->start_name_list( _src_ssl_ssl_hs_client_cCTX->client_auth_vtable); } } break; case 23: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 24: { /* begin-cert */ if (ENG->chain_len == 0) { T0_PUSHi(-1); } else { ENG->cert_cur = ENG->chain->data; ENG->cert_len = ENG->chain->data_len; ENG->chain ++; ENG->chain_len --; T0_PUSH(ENG->cert_len); } } break; case 25: { /* bzero */ size_t len = (size_t)T0_POP(); void *addr = (unsigned char *)ENG + (size_t)T0_POP(); memset(addr, 0, len); } break; case 26: { /* can-output? */ T0_PUSHi(-(ENG->hlen_out > 0)); } break; case 27: { /* co */ T0_CO(); } break; case 28: { /* compute-Finished-inner */ int prf_id = T0_POP(); int from_client = T0_POPi(); unsigned char tmp[48]; br_tls_prf_seed_chunk seed; br_tls_prf_impl prf = br_ssl_engine_get_PRF(ENG, prf_id); seed.data = tmp; if (ENG->session.version >= BR_TLS12) { seed.len = br_multihash_out(&ENG->mhash, prf_id, tmp); } else { br_multihash_out(&ENG->mhash, br_md5_ID, tmp); br_multihash_out(&ENG->mhash, br_sha1_ID, tmp + 16); seed.len = 36; } prf(ENG->pad, 12, ENG->session.master_secret, sizeof ENG->session.master_secret, from_client ? "client finished" : "server finished", 1, &seed); } break; case 29: { /* copy-cert-chunk */ size_t clen; clen = ENG->cert_len; if (clen > sizeof ENG->pad) { clen = sizeof ENG->pad; } memcpy(ENG->pad, ENG->cert_cur, clen); ENG->cert_cur += clen; ENG->cert_len -= clen; T0_PUSH(clen); } break; case 30: { /* copy-protocol-name */ size_t idx = T0_POP(); size_t len = strlen(ENG->protocol_names[idx]); memcpy(ENG->pad, ENG->protocol_names[idx], len); T0_PUSH(len); } break; case 31: { /* data-get8 */ size_t addr = T0_POP(); T0_PUSH(t0_datablock[addr]); } break; case 32: { /* discard-input */ ENG->hlen_in = 0; } break; case 33: { /* do-client-sign */ size_t sig_len; sig_len = make_client_sign(_src_ssl_ssl_hs_client_cCTX); if (sig_len == 0) { br_ssl_engine_fail(ENG, BR_ERR_INVALID_ALGORITHM); T0_CO(); } T0_PUSH(sig_len); } break; case 34: { /* do-ecdh */ unsigned prf_id = T0_POP(); unsigned ecdhe = T0_POP(); int x; x = make_pms_ecdh(_src_ssl_ssl_hs_client_cCTX, ecdhe, prf_id); if (x < 0) { br_ssl_engine_fail(ENG, -x); T0_CO(); } else { T0_PUSH(x); } } break; case 35: { /* do-rsa-encrypt */ int x; x = make_pms_rsa(_src_ssl_ssl_hs_client_cCTX, T0_POP()); if (x < 0) { br_ssl_engine_fail(ENG, -x); T0_CO(); } else { T0_PUSH(x); } } break; case 36: { /* do-static-ecdh */ unsigned prf_id = T0_POP(); if (make_pms_static_ecdh(_src_ssl_ssl_hs_client_cCTX, prf_id) < 0) { br_ssl_engine_fail(ENG, BR_ERR_INVALID_ALGORITHM); T0_CO(); } } break; case 37: { /* drop */ (void)T0_POP(); } break; case 38: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 39: { /* ext-ALPN-length */ size_t u, len; if (ENG->protocol_names_num == 0) { T0_PUSH(0); T0_RET(); } len = 6; for (u = 0; u < ENG->protocol_names_num; u ++) { len += 1 + strlen(ENG->protocol_names[u]); } T0_PUSH(len); } break; case 40: { /* fail */ br_ssl_engine_fail(ENG, (int)T0_POPi()); T0_CO(); } break; case 41: { /* flush-record */ br_ssl_engine_flush_record(ENG); } break; case 42: { /* get-client-chain */ uint32_t auth_types; auth_types = T0_POP(); if (_src_ssl_ssl_hs_client_cCTX->client_auth_vtable != NULL) { br_ssl_client_certificate ux; (*_src_ssl_ssl_hs_client_cCTX->client_auth_vtable)->choose(_src_ssl_ssl_hs_client_cCTX->client_auth_vtable, _src_ssl_ssl_hs_client_cCTX, auth_types, &ux); _src_ssl_ssl_hs_client_cCTX->auth_type = (unsigned char)ux.auth_type; _src_ssl_ssl_hs_client_cCTX->hash_id = (unsigned char)ux.hash_id; ENG->chain = ux.chain; ENG->chain_len = ux.chain_len; } else { _src_ssl_ssl_hs_client_cCTX->hash_id = 0; ENG->chain_len = 0; } } break; case 43: { /* get-key-type-usages */ const br_x509_class *xc; const br_x509_pkey *pk; unsigned usages; xc = *(ENG->x509ctx); pk = xc->get_pkey(ENG->x509ctx, &usages); if (pk == NULL) { T0_PUSH(0); } else { T0_PUSH(pk->key_type | usages); } } break; case 44: { /* get16 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*(uint16_t *)(void *)((unsigned char *)ENG + addr)); } break; case 45: { /* get32 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*(uint32_t *)(void *)((unsigned char *)ENG + addr)); } break; case 46: { /* get8 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*((unsigned char *)ENG + addr)); } break; case 47: { /* has-input? */ T0_PUSHi(-(ENG->hlen_in != 0)); } break; case 48: { /* memcmp */ size_t len = (size_t)T0_POP(); void *addr2 = (unsigned char *)ENG + (size_t)T0_POP(); void *addr1 = (unsigned char *)ENG + (size_t)T0_POP(); int x = memcmp(addr1, addr2, len); T0_PUSH((uint32_t)-(x == 0)); } break; case 49: { /* memcpy */ size_t len = (size_t)T0_POP(); void *src = (unsigned char *)ENG + (size_t)T0_POP(); void *dst = (unsigned char *)ENG + (size_t)T0_POP(); memcpy(dst, src, len); } break; case 50: { /* _src_ssl_ssl_hs_client_cmkrand */ size_t len = (size_t)T0_POP(); void *addr = (unsigned char *)ENG + (size_t)T0_POP(); br_hmac_drbg_generate(&ENG->rng, addr, len); } break; case 51: { /* more-incoming-bytes? */ T0_PUSHi(ENG->hlen_in != 0 || !br_ssl_engine_recvrec_finished(ENG)); } break; case 52: { /* multihash-init */ br_multihash_init(&ENG->mhash); } break; case 53: { /* neg */ uint32_t a = T0_POP(); T0_PUSH(-a); } break; case 54: { /* not */ uint32_t a = T0_POP(); T0_PUSH(~a); } break; case 55: { /* or */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a | b); } break; case 56: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 57: { /* read-chunk-native */ size_t clen = ENG->hlen_in; if (clen > 0) { uint32_t addr, len; len = T0_POP(); addr = T0_POP(); if ((size_t)len < clen) { clen = (size_t)len; } memcpy((unsigned char *)ENG + addr, ENG->hbuf_in, clen); if (ENG->record_type_in == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, ENG->hbuf_in, clen); } T0_PUSH(addr + (uint32_t)clen); T0_PUSH(len - (uint32_t)clen); ENG->hbuf_in += clen; ENG->hlen_in -= clen; } } break; case 58: { /* read8-native */ if (ENG->hlen_in > 0) { unsigned char x; x = *ENG->hbuf_in ++; if (ENG->record_type_in == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, &x, 1); } T0_PUSH(x); ENG->hlen_in --; } else { T0_PUSHi(-1); } } break; case 59: { /* set-server-curve */ const br_x509_class *xc; const br_x509_pkey *pk; xc = *(ENG->x509ctx); pk = xc->get_pkey(ENG->x509ctx, NULL); _src_ssl_ssl_hs_client_cCTX->server_curve = (pk->key_type == BR_KEYTYPE_EC) ? pk->key.ec.curve : 0; } break; case 60: { /* set16 */ size_t addr = (size_t)T0_POP(); *(uint16_t *)(void *)((unsigned char *)ENG + addr) = (uint16_t)T0_POP(); } break; case 61: { /* set32 */ size_t addr = (size_t)T0_POP(); *(uint32_t *)(void *)((unsigned char *)ENG + addr) = (uint32_t)T0_POP(); } break; case 62: { /* set8 */ size_t addr = (size_t)T0_POP(); *((unsigned char *)ENG + addr) = (unsigned char)T0_POP(); } break; case 63: { /* strlen */ void *str = (unsigned char *)ENG + (size_t)T0_POP(); T0_PUSH((uint32_t)strlen((const char*)str)); } break; case 64: { /* supported-curves */ uint32_t x = ENG->iec == NULL ? 0 : ENG->iec->supported_curves; T0_PUSH(x); } break; case 65: { /* supported-hash-functions */ int i; unsigned x, num; x = 0; num = 0; for (i = br_sha1_ID; i <= br_sha512_ID; i ++) { if (br_multihash_getimpl(&ENG->mhash, i)) { x |= 1U << i; num ++; } } T0_PUSH(x); T0_PUSH(num); } break; case 66: { /* supports-ecdsa? */ T0_PUSHi(-(ENG->iecdsa != 0)); } break; case 67: { /* supports-rsa-sign? */ T0_PUSHi(-(ENG->irsavrfy != 0)); } break; case 68: { /* swap */ T0_SWAP(); } break; case 69: { /* switch-aesccm-in */ int is_client, prf_id; unsigned cipher_key_len, tag_len; tag_len = T0_POP(); cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_ccm_in(ENG, is_client, prf_id, ENG->iaes_ctrcbc, cipher_key_len, tag_len); } break; case 70: { /* switch-aesccm-out */ int is_client, prf_id; unsigned cipher_key_len, tag_len; tag_len = T0_POP(); cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_ccm_out(ENG, is_client, prf_id, ENG->iaes_ctrcbc, cipher_key_len, tag_len); } break; case 71: { /* switch-aesgcm-in */ int is_client, prf_id; unsigned cipher_key_len; cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_gcm_in(ENG, is_client, prf_id, ENG->iaes_ctr, cipher_key_len); } break; case 72: { /* switch-aesgcm-out */ int is_client, prf_id; unsigned cipher_key_len; cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_gcm_out(ENG, is_client, prf_id, ENG->iaes_ctr, cipher_key_len); } break; case 73: { /* switch-cbc-in */ int is_client, prf_id, mac_id, aes; unsigned cipher_key_len; cipher_key_len = T0_POP(); aes = T0_POP(); mac_id = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_cbc_in(ENG, is_client, prf_id, mac_id, aes ? ENG->iaes_cbcdec : ENG->ides_cbcdec, cipher_key_len); } break; case 74: { /* switch-cbc-out */ int is_client, prf_id, mac_id, aes; unsigned cipher_key_len; cipher_key_len = T0_POP(); aes = T0_POP(); mac_id = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_cbc_out(ENG, is_client, prf_id, mac_id, aes ? ENG->iaes_cbcenc : ENG->ides_cbcenc, cipher_key_len); } break; case 75: { /* switch-chapol-in */ int is_client, prf_id; prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_chapol_in(ENG, is_client, prf_id); } break; case 76: { /* switch-chapol-out */ int is_client, prf_id; prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_chapol_out(ENG, is_client, prf_id); } break; case 77: { /* test-protocol-name */ size_t len = T0_POP(); size_t u; for (u = 0; u < ENG->protocol_names_num; u ++) { const char *name; name = ENG->protocol_names[u]; if (len == strlen(name) && memcmp(ENG->pad, name, len) == 0) { T0_PUSH(u); T0_RET(); } } T0_PUSHi(-1); } break; case 78: { /* total-chain-length */ size_t u; uint32_t total; total = 0; for (u = 0; u < ENG->chain_len; u ++) { total += 3 + (uint32_t)ENG->chain[u].data_len; } T0_PUSH(total); } break; case 79: { /* u>> */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x >> c); } break; case 80: { /* verify-SKE-sig */ size_t sig_len = T0_POP(); int use_rsa = T0_POPi(); int hash = T0_POPi(); T0_PUSH(verify_SKE_sig(_src_ssl_ssl_hs_client_cCTX, hash, use_rsa, sig_len)); } break; case 81: { /* write-blob-chunk */ size_t clen = ENG->hlen_out; if (clen > 0) { uint32_t addr, len; len = T0_POP(); addr = T0_POP(); if ((size_t)len < clen) { clen = (size_t)len; } memcpy(ENG->hbuf_out, (unsigned char *)ENG + addr, clen); if (ENG->record_type_out == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, ENG->hbuf_out, clen); } T0_PUSH(addr + (uint32_t)clen); T0_PUSH(len - (uint32_t)clen); ENG->hbuf_out += clen; ENG->hlen_out -= clen; } } break; case 82: { /* write8-native */ unsigned char x; x = (unsigned char)T0_POP(); if (ENG->hlen_out > 0) { if (ENG->record_type_out == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, &x, 1); } *ENG->hbuf_out ++ = x; ENG->hlen_out --; T0_PUSHi(-1); } else { T0_PUSHi(0); } } break; case 83: { /* x509-append */ const br_x509_class *xc; size_t len; xc = *(ENG->x509ctx); len = T0_POP(); xc->append(ENG->x509ctx, ENG->pad, len); } break; case 84: { /* x509-end-cert */ const br_x509_class *xc; xc = *(ENG->x509ctx); xc->end_cert(ENG->x509ctx); } break; case 85: { /* x509-end-chain */ const br_x509_class *xc; xc = *(ENG->x509ctx); T0_PUSH(xc->end_chain(ENG->x509ctx)); } break; case 86: { /* x509-start-cert */ const br_x509_class *xc; xc = *(ENG->x509ctx); xc->start_cert(ENG->x509ctx, T0_POP()); } break; case 87: { /* x509-start-chain */ const br_x509_class *xc; uint32_t bc; bc = T0_POP(); xc = *(ENG->x509ctx); xc->start_chain(ENG->x509ctx, bc ? ENG->server_name : NULL); } break; } } else { _src_ssl_ssl_hs_client_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->dp = dp; ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->rp = rp; ((_src_ssl_ssl_hs_client_ct0_context *)t0ctx)->ip = ip; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_ssl_ssl_hs_server_ct0_context; static uint32_t _src_ssl_ssl_hs_server_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_ssl_ssl_hs_server_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char _src_ssl_ssl_hs_server_ct0_datablock[]; */ void br_ssl_hs_server_init_main(void *t0ctx); void br_ssl_hs_server_run(void *t0ctx); #include #include /* * This macro evaluates to a pointer to the current engine context. */ #define ENG ((br_ssl_engine_context *)(void *)((unsigned char *)t0ctx - offsetof(br_ssl_engine_context, cpu))) /* * This macro evaluates to a pointer to the server context, under that * specific name. It must be noted that since the engine context is the * first field of the br_ssl_server_context structure ('eng'), then * pointers values of both types are interchangeable, modulo an * appropriate cast. This also means that "addresses" computed as offsets * within the structure work for both kinds of context. */ #define _src_ssl_ssl_hs_server_cCTX ((br_ssl_server_context *)ENG) /* * Decrypt the pre-master secret (RSA key exchange). */ static void do_rsa_decrypt(br_ssl_server_context *ctx, int prf_id, unsigned char *epms, size_t len) { uint32_t x; unsigned char rpms[48]; /* * Decrypt the PMS. */ x = (*ctx->policy_vtable)->do_keyx(ctx->policy_vtable, epms, &len); /* * Set the first two bytes to the maximum supported client * protocol version. These bytes are used for version rollback * detection; forceing the two bytes will make the master secret * wrong if the bytes are not correct. This process is * recommended by RFC 5246 (section 7.4.7.1). */ br_enc16be(epms, ctx->client_max_version); /* * Make a random PMS and copy it above the decrypted value if the * decryption failed. Note that we use a constant-time conditional * copy. */ br_hmac_drbg_generate(&ctx->eng.rng, rpms, sizeof rpms); br_ccopy(x ^ 1, epms, rpms, sizeof rpms); /* * Compute master secret. */ br_ssl_engine_compute_master(&ctx->eng, prf_id, epms, 48); /* * Clear the pre-master secret from RAM: it is normally a buffer * in the context, hence potentially long-lived. */ memset(epms, 0, len); } /* * Common part for ECDH and ECDHE. */ static void ecdh_common(br_ssl_server_context *ctx, int prf_id, unsigned char *xcoor, size_t xcoor_len, uint32_t ctl) { unsigned char rpms[80]; if (xcoor_len > sizeof rpms) { xcoor_len = sizeof rpms; ctl = 0; } /* * Make a random PMS and copy it above the decrypted value if the * decryption failed. Note that we use a constant-time conditional * copy. */ br_hmac_drbg_generate(&ctx->eng.rng, rpms, xcoor_len); br_ccopy(ctl ^ 1, xcoor, rpms, xcoor_len); /* * Compute master secret. */ br_ssl_engine_compute_master(&ctx->eng, prf_id, xcoor, xcoor_len); /* * Clear the pre-master secret from RAM: it is normally a buffer * in the context, hence potentially long-lived. */ memset(xcoor, 0, xcoor_len); } /* * Do the ECDH key exchange (not ECDHE). */ static void do_ecdh(br_ssl_server_context *ctx, int prf_id, unsigned char *cpoint, size_t cpoint_len) { uint32_t x; /* * Finalise the key exchange. */ x = (*ctx->policy_vtable)->do_keyx(ctx->policy_vtable, cpoint, &cpoint_len); ecdh_common(ctx, prf_id, cpoint, cpoint_len, x); } /* * Do the full static ECDH key exchange. When this function is called, * it has already been verified that the cipher suite uses ECDH (not ECDHE), * and the client's public key (from its certificate) has type EC and is * apt for key exchange. */ static void do_static_ecdh(br_ssl_server_context *ctx, int prf_id) { unsigned char cpoint[133]; size_t cpoint_len; const br_x509_class **xc; const br_x509_pkey *pk; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); cpoint_len = pk->key.ec.qlen; if (cpoint_len > sizeof cpoint) { /* * If the point is larger than our buffer then we need to * restrict it. Length 2 is not a valid point length, so * the ECDH will fail. */ cpoint_len = 2; } memcpy(cpoint, pk->key.ec.q, cpoint_len); do_ecdh(ctx, prf_id, cpoint, cpoint_len); } static size_t _src_ssl_ssl_hs_server_chash_data(br_ssl_server_context *ctx, void *dst, int hash_id, const void *src, size_t len) { const br_hash_class *hf; br_hash_compat_context hc; if (hash_id == 0) { unsigned char tmp[36]; hf = br_multihash_getimpl(&ctx->eng.mhash, br_md5_ID); if (hf == NULL) { return 0; } hf->init(&hc.vtable); hf->update(&hc.vtable, src, len); hf->out(&hc.vtable, tmp); hf = br_multihash_getimpl(&ctx->eng.mhash, br_sha1_ID); if (hf == NULL) { return 0; } hf->init(&hc.vtable); hf->update(&hc.vtable, src, len); hf->out(&hc.vtable, tmp + 16); memcpy(dst, tmp, 36); return 36; } else { hf = br_multihash_getimpl(&ctx->eng.mhash, hash_id); if (hf == NULL) { return 0; } hf->init(&hc.vtable); hf->update(&hc.vtable, src, len); hf->out(&hc.vtable, dst); return (hf->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK; } } /* * Do the ECDHE key exchange (part 1: generation of transient key, and * computing of the point to send to the client). Returned value is the * signature length (in bytes), or -x on error (with x being an error * code). The encoded point is written in the ecdhe_point[] context buffer * (length in ecdhe_point_len). */ static int do_ecdhe_part1(br_ssl_server_context *ctx, int curve) { unsigned algo_id; unsigned mask; const unsigned char *order; size_t olen, glen; size_t hv_len, sig_len; if (!((ctx->eng.iec->supported_curves >> curve) & 1)) { return -BR_ERR_INVALID_ALGORITHM; } ctx->eng.ecdhe_curve = curve; /* * Generate our private key. We need a non-zero random value * which is lower than the curve order, in a "large enough" * range. We force the top bit to 0 and bottom bit to 1, which * does the trick. Note that contrary to what happens in ECDSA, * this is not a problem if we do not cover the full range of * possible values. */ order = ctx->eng.iec->order(curve, &olen); mask = 0xFF; while (mask >= order[0]) { mask >>= 1; } br_hmac_drbg_generate(&ctx->eng.rng, ctx->ecdhe_key, olen); ctx->ecdhe_key[0] &= mask; ctx->ecdhe_key[olen - 1] |= 0x01; ctx->ecdhe_key_len = olen; /* * Compute our ECDH point. */ glen = ctx->eng.iec->mulgen(ctx->eng.ecdhe_point, ctx->ecdhe_key, olen, curve); ctx->eng.ecdhe_point_len = glen; /* * Assemble the message to be signed, and possibly hash it. */ memcpy(ctx->eng.pad, ctx->eng.client_random, 32); memcpy(ctx->eng.pad + 32, ctx->eng.server_random, 32); ctx->eng.pad[64 + 0] = 0x03; ctx->eng.pad[64 + 1] = 0x00; ctx->eng.pad[64 + 2] = curve; ctx->eng.pad[64 + 3] = ctx->eng.ecdhe_point_len; memcpy(ctx->eng.pad + 64 + 4, ctx->eng.ecdhe_point, ctx->eng.ecdhe_point_len); hv_len = 64 + 4 + ctx->eng.ecdhe_point_len; algo_id = ctx->sign_hash_id; if (algo_id >= (unsigned)0xFF00) { hv_len = _src_ssl_ssl_hs_server_chash_data(ctx, ctx->eng.pad, algo_id & 0xFF, ctx->eng.pad, hv_len); if (hv_len == 0) { return -BR_ERR_INVALID_ALGORITHM; } } sig_len = (*ctx->policy_vtable)->do_sign(ctx->policy_vtable, algo_id, ctx->eng.pad, hv_len, sizeof ctx->eng.pad); return sig_len ? (int)sig_len : -BR_ERR_INVALID_ALGORITHM; } /* * Do the ECDHE key exchange (part 2: computation of the shared secret * from the point sent by the client). */ static void do_ecdhe_part2(br_ssl_server_context *ctx, int prf_id, unsigned char *cpoint, size_t cpoint_len) { int curve; uint32_t ctl; size_t xoff, xlen; curve = ctx->eng.ecdhe_curve; /* * Finalise the key exchange. */ ctl = ctx->eng.iec->mul(cpoint, cpoint_len, ctx->ecdhe_key, ctx->ecdhe_key_len, curve); xoff = ctx->eng.iec->xoff(curve, &xlen); ecdh_common(ctx, prf_id, cpoint + xoff, xlen, ctl); /* * Clear the ECDHE private key. Forward Secrecy is achieved insofar * as that key does not get stolen, so we'd better destroy it * as soon as it ceases to be useful. */ memset(ctx->ecdhe_key, 0, ctx->ecdhe_key_len); } /* * Offset for hash value within the pad (when obtaining all hash values, * in preparation for verification of the CertificateVerify message). * Order is MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512; last value * is used to get the total length. */ static const unsigned char HASH_PAD_OFF[] = { 0, 16, 36, 64, 96, 144, 208 }; /* * OID for hash functions in RSA signatures. */ static const unsigned char _src_ssl_ssl_hs_server_cHASH_OID_SHA1[] = { 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A }; static const unsigned char _src_ssl_ssl_hs_server_cHASH_OID_SHA224[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04 }; static const unsigned char _src_ssl_ssl_hs_server_cHASH_OID_SHA256[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01 }; static const unsigned char _src_ssl_ssl_hs_server_cHASH_OID_SHA384[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02 }; static const unsigned char _src_ssl_ssl_hs_server_cHASH_OID_SHA512[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03 }; static const unsigned char *_src_ssl_ssl_hs_server_cHASH_OID[] = { _src_ssl_ssl_hs_server_cHASH_OID_SHA1, _src_ssl_ssl_hs_server_cHASH_OID_SHA224, _src_ssl_ssl_hs_server_cHASH_OID_SHA256, _src_ssl_ssl_hs_server_cHASH_OID_SHA384, _src_ssl_ssl_hs_server_cHASH_OID_SHA512 }; /* * Verify the signature in CertificateVerify. Returned value is 0 on * success, or a non-zero error code. Lack of implementation of the * designated signature algorithm is reported as a "bad signature" * error (because it means that the peer did not honour our advertised * set of supported signature algorithms). */ static int verify_CV_sig(br_ssl_server_context *ctx, size_t sig_len) { const br_x509_class **xc; const br_x509_pkey *pk; int id; id = ctx->hash_CV_id; xc = ctx->eng.x509ctx; pk = (*xc)->get_pkey(xc, NULL); if (pk->key_type == BR_KEYTYPE_RSA) { unsigned char tmp[64]; const unsigned char *hash_oid; if (id == 0) { hash_oid = NULL; } else { hash_oid = _src_ssl_ssl_hs_server_cHASH_OID[id - 2]; } if (ctx->eng.irsavrfy == 0) { return BR_ERR_BAD_SIGNATURE; } if (!ctx->eng.irsavrfy(ctx->eng.pad, sig_len, hash_oid, ctx->hash_CV_len, &pk->key.rsa, tmp) || memcmp(tmp, ctx->hash_CV, ctx->hash_CV_len) != 0) { return BR_ERR_BAD_SIGNATURE; } } else { if (ctx->eng.iecdsa == 0) { return BR_ERR_BAD_SIGNATURE; } if (!ctx->eng.iecdsa(ctx->eng.iec, ctx->hash_CV, ctx->hash_CV_len, &pk->key.ec, ctx->eng.pad, sig_len)) { return BR_ERR_BAD_SIGNATURE; } } return 0; } static const unsigned char _src_ssl_ssl_hs_server_ct0_datablock[] = { 0x00, 0x00, 0x0A, 0x00, 0x24, 0x00, 0x2F, 0x01, 0x24, 0x00, 0x35, 0x02, 0x24, 0x00, 0x3C, 0x01, 0x44, 0x00, 0x3D, 0x02, 0x44, 0x00, 0x9C, 0x03, 0x04, 0x00, 0x9D, 0x04, 0x05, 0xC0, 0x03, 0x40, 0x24, 0xC0, 0x04, 0x41, 0x24, 0xC0, 0x05, 0x42, 0x24, 0xC0, 0x08, 0x20, 0x24, 0xC0, 0x09, 0x21, 0x24, 0xC0, 0x0A, 0x22, 0x24, 0xC0, 0x0D, 0x30, 0x24, 0xC0, 0x0E, 0x31, 0x24, 0xC0, 0x0F, 0x32, 0x24, 0xC0, 0x12, 0x10, 0x24, 0xC0, 0x13, 0x11, 0x24, 0xC0, 0x14, 0x12, 0x24, 0xC0, 0x23, 0x21, 0x44, 0xC0, 0x24, 0x22, 0x55, 0xC0, 0x25, 0x41, 0x44, 0xC0, 0x26, 0x42, 0x55, 0xC0, 0x27, 0x11, 0x44, 0xC0, 0x28, 0x12, 0x55, 0xC0, 0x29, 0x31, 0x44, 0xC0, 0x2A, 0x32, 0x55, 0xC0, 0x2B, 0x23, 0x04, 0xC0, 0x2C, 0x24, 0x05, 0xC0, 0x2D, 0x43, 0x04, 0xC0, 0x2E, 0x44, 0x05, 0xC0, 0x2F, 0x13, 0x04, 0xC0, 0x30, 0x14, 0x05, 0xC0, 0x31, 0x33, 0x04, 0xC0, 0x32, 0x34, 0x05, 0xC0, 0x9C, 0x06, 0x04, 0xC0, 0x9D, 0x07, 0x04, 0xC0, 0xA0, 0x08, 0x04, 0xC0, 0xA1, 0x09, 0x04, 0xC0, 0xAC, 0x26, 0x04, 0xC0, 0xAD, 0x27, 0x04, 0xC0, 0xAE, 0x28, 0x04, 0xC0, 0xAF, 0x29, 0x04, 0xCC, 0xA8, 0x15, 0x04, 0xCC, 0xA9, 0x25, 0x04, 0x00, 0x00 }; static const unsigned char _src_ssl_ssl_hs_server_ct0_codeblock[] = { 0x00, 0x01, 0x00, 0x0B, 0x00, 0x00, 0x01, 0x00, 0x0E, 0x00, 0x00, 0x01, 0x00, 0x0F, 0x00, 0x00, 0x01, 0x00, 0x10, 0x00, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x01, 0x01, 0x09, 0x00, 0x00, 0x01, 0x02, 0x08, 0x00, 0x00, 0x01, 0x02, 0x09, 0x00, 0x00, 0x29, 0x29, 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_CCS), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_FINISHED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_FRAGLEN), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_HANDSHAKE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_PARAM), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_SECRENEG), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_SIGNATURE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_BAD_VERSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_INVALID_ALGORITHM), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_LIMIT_EXCEEDED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_NO_CLIENT_AUTH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_OK), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_OVERSIZED_ID), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_UNEXPECTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_WRONG_KEY_USAGE), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, action)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, alert)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, application_data)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, cipher_suite)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, client_max_version)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, client_random)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, client_suites)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, client_suites_num)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, close_received)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, curves)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, ecdhe_point)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, ecdhe_point_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, flags)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, hashes)), 0x00, 0x00, 0x7B, 0x01, T0_INT2(BR_MAX_CIPHER_SUITES * sizeof(br_suite_translated)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, log_max_frag_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, pad)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, peer_log_max_frag_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, protocol_names_num)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, record_type_in)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, record_type_out)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, reneg)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, saved_finished)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, selected_protocol)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, server_name)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, server_random)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, session_id)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, session_id_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, shutdown_recv)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_server_context, sign_hash_id)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, suites_buf)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, suites_num)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, session) + offsetof(br_ssl_session_parameters, version)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_in)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_max)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_min)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_ssl_engine_context, version_out)), 0x00, 0x00, 0x09, 0x2A, 0x5D, 0x06, 0x02, 0x6A, 0x2B, 0x00, 0x00, 0x01, 0x01, 0x00, 0x01, 0x03, 0x00, 0x9B, 0x2A, 0x63, 0x47, 0x9F, 0x2A, 0x05, 0x04, 0x65, 0x01, 0x00, 0x00, 0x02, 0x00, 0x0F, 0x06, 0x02, 0x9F, 0x00, 0x63, 0x04, 0x6B, 0x00, 0x06, 0x02, 0x6A, 0x2B, 0x00, 0x00, 0x2A, 0x8B, 0x47, 0x05, 0x03, 0x01, 0x0C, 0x08, 0x47, 0x78, 0x2E, 0xA8, 0x1C, 0x85, 0x01, 0x0C, 0x33, 0x00, 0x00, 0x2A, 0x22, 0x01, 0x08, 0x0C, 0x47, 0x61, 0x22, 0x08, 0x00, 0x01, 0x03, 0x00, 0x77, 0x30, 0x02, 0x00, 0x38, 0x13, 0x01, 0x01, 0x0C, 0x77, 0x42, 0x2C, 0x19, 0x38, 0x06, 0x07, 0x02, 0x00, 0xD0, 0x03, 0x00, 0x04, 0x75, 0x01, 0x00, 0xC7, 0x02, 0x00, 0x2A, 0x19, 0x13, 0x06, 0x02, 0x71, 0x2B, 0xD0, 0x04, 0x76, 0x00, 0x01, 0x00, 0x77, 0x42, 0x01, 0x16, 0x89, 0x42, 0x01, 0x00, 0x8C, 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0x03, 0xE2, 0x02, 0x00, 0xE0, 0x7F, 0x80, 0x30, 0xDB, 0x02, 0x02, 0x06, 0x1C, 0x92, 0x2E, 0x2A, 0x01, 0x83, 0xFE, 0x00, 0x0B, 0x06, 0x03, 0xE0, 0x04, 0x0F, 0x01, 0x81, 0x7F, 0x13, 0xE2, 0x78, 0x2E, 0xCD, 0x01, 0x01, 0x0C, 0x01, 0x03, 0x08, 0xE2, 0x02, 0x01, 0xE0, 0x85, 0x02, 0x01, 0xDA, 0x00, 0x00, 0x56, 0x2A, 0x01, 0x00, 0x0F, 0x06, 0x02, 0x65, 0x00, 0xCF, 0x29, 0x04, 0x73, 0x00, 0x2A, 0xE2, 0xDA, 0x00, 0x00, 0x01, 0x00, 0x78, 0x2E, 0xCB, 0x06, 0x0C, 0x63, 0x3A, 0x06, 0x08, 0x01, 0x80, 0x41, 0xE2, 0x01, 0x80, 0x42, 0xE2, 0x46, 0x06, 0x07, 0x61, 0x3A, 0x06, 0x03, 0x01, 0x01, 0xE2, 0x45, 0x06, 0x08, 0x61, 0x3A, 0x06, 0x04, 0x01, 0x80, 0x40, 0xE2, 0x47, 0x29, 0x00, 0x01, 0x01, 0x00, 0x03, 0x00, 0x46, 0x45, 0x39, 0x05, 0x14, 0x01, 0x01, 0x01, 0x80, 0x7C, 0xDE, 0x03, 0x00, 0x01, 0x03, 0x01, 0x80, 0x7C, 0xDE, 0x02, 0x00, 0x08, 0x47, 0x29, 0x00, 0x46, 0x06, 0x07, 0x01, 0x01, 0x44, 0x29, 0xDE, 0x03, 0x00, 0x45, 0x06, 0x0A, 0x01, 0x03, 0x44, 0x29, 0xDE, 0x02, 0x00, 0x08, 0x03, 0x00, 0x29, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x04, 0xDF, 0x01, 0x05, 0xDF, 0x01, 0x06, 0xDF, 0x01, 0x03, 0xDF, 0x01, 0x02, 0xDF, 0x0A, 0x65, 0x00, 0x01, 0x03, 0x00, 0x3A, 0x01, 0x01, 0x02, 0x00, 0x0C, 0x13, 0x05, 0x01, 0x00, 0x63, 0x01, 0x03, 0x3B, 0x06, 0x07, 0x02, 0x00, 0xE2, 0x01, 0x02, 0x3B, 0xE2, 0x00, 0x00, 0x2A, 0x01, 0x08, 0x54, 0xE2, 0xE2, 0x00, 0x00, 0x2A, 0x01, 0x10, 0x54, 0xE2, 0xE0, 0x00, 0x00, 0x2A, 0x57, 0x06, 0x02, 0x29, 0x00, 0xCF, 0x29, 0x04, 0x76 }; static const uint16_t _src_ssl_ssl_hs_server_ct0_caddr[] = { 0, 5, 10, 15, 20, 25, 30, 35, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 109, 114, 119, 124, 129, 134, 139, 144, 149, 154, 159, 164, 169, 174, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 299, 303, 328, 334, 353, 364, 405, 516, 520, 553, 563, 587, 669, 683, 689, 748, 767, 789, 838, 887, 963, 1065, 1076, 1670, 1674, 1741, 1751, 1782, 1806, 1852, 1922, 1962, 1976, 1985, 1989, 2084, 2092, 2128, 2139, 2155, 2161, 2172, 2207, 2233, 2245, 2251, 2264, 2279, 2472, 2481, 2494, 2503, 2510, 2616, 2641, 2654, 2670, 2688, 2720, 2793, 2806, 2987, 2995, 3122, 3136, 3141, 3185, 3242, 3263, 3290, 3298, 3306 }; #define _src_ssl_ssl_hs_server_cT0_INTERPRETED 93 #define _src_ssl_ssl_hs_server_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &_src_ssl_ssl_hs_server_ct0_codeblock[_src_ssl_ssl_hs_server_ct0_caddr[(slot) - _src_ssl_ssl_hs_server_cT0_INTERPRETED]]; \ t0_lnum = _src_ssl_ssl_hs_server_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &_src_ssl_ssl_hs_server_ct0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define _src_ssl_ssl_hs_server_cT0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_ssl_ssl_hs_server_ct0_context *t0ctx =(_src_ssl_ssl_hs_server_ct0_context*)ctx; \ t0ctx->ip = &_src_ssl_ssl_hs_server_ct0_codeblock[0]; \ _src_ssl_ssl_hs_server_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } _src_ssl_ssl_hs_server_cT0_DEFENTRY(br_ssl_hs_server_init_main, 166) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_ssl_hs_server_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->dp; rp = ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->rp; ip = ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_ssl_ssl_hs_server_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &_src_ssl_ssl_hs_server_ct0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_ssl_ssl_hs_server_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_ssl_ssl_hs_server_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_ssl_ssl_hs_server_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_ssl_ssl_hs_server_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_ssl_ssl_hs_server_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_ssl_ssl_hs_server_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* * */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a * b); } break; case 8: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 9: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 10: { /* -rot */ T0_NROT(); } break; case 11: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 12: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 13: { /* <= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a <= b)); } break; case 14: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 15: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 16: { /* > */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a > b)); } break; case 17: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 18: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 19: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 20: { /* begin-cert */ if (ENG->chain_len == 0) { T0_PUSHi(-1); } else { ENG->cert_cur = ENG->chain->data; ENG->cert_len = ENG->chain->data_len; ENG->chain ++; ENG->chain_len --; T0_PUSH(ENG->cert_len); } } break; case 21: { /* begin-ta-name */ const br_x500_name *dn; if (_src_ssl_ssl_hs_server_cCTX->cur_dn_index >= _src_ssl_ssl_hs_server_cCTX->num_tas) { T0_PUSHi(-1); } else { if (_src_ssl_ssl_hs_server_cCTX->ta_names == NULL) { dn = &_src_ssl_ssl_hs_server_cCTX->tas[_src_ssl_ssl_hs_server_cCTX->cur_dn_index].dn; } else { dn = &_src_ssl_ssl_hs_server_cCTX->ta_names[_src_ssl_ssl_hs_server_cCTX->cur_dn_index]; } _src_ssl_ssl_hs_server_cCTX->cur_dn_index ++; _src_ssl_ssl_hs_server_cCTX->cur_dn = dn->data; _src_ssl_ssl_hs_server_cCTX->cur_dn_len = dn->len; T0_PUSH(_src_ssl_ssl_hs_server_cCTX->cur_dn_len); } } break; case 22: { /* begin-ta-name-list */ _src_ssl_ssl_hs_server_cCTX->cur_dn_index = 0; } break; case 23: { /* bzero */ size_t len = (size_t)T0_POP(); void *addr = (unsigned char *)ENG + (size_t)T0_POP(); memset(addr, 0, len); } break; case 24: { /* call-policy-handler */ int x; br_ssl_server_choices choices; x = (*_src_ssl_ssl_hs_server_cCTX->policy_vtable)->choose( _src_ssl_ssl_hs_server_cCTX->policy_vtable, _src_ssl_ssl_hs_server_cCTX, &choices); ENG->session.cipher_suite = choices.cipher_suite; _src_ssl_ssl_hs_server_cCTX->sign_hash_id = choices.algo_id; ENG->chain = choices.chain; ENG->chain_len = choices.chain_len; T0_PUSHi(-(x != 0)); } break; case 25: { /* can-output? */ T0_PUSHi(-(ENG->hlen_out > 0)); } break; case 26: { /* check-resume */ if (ENG->session.session_id_len == 32 && _src_ssl_ssl_hs_server_cCTX->cache_vtable != NULL && (*_src_ssl_ssl_hs_server_cCTX->cache_vtable)->load( _src_ssl_ssl_hs_server_cCTX->cache_vtable, _src_ssl_ssl_hs_server_cCTX, &ENG->session)) { T0_PUSHi(-1); } else { T0_PUSH(0); } } break; case 27: { /* co */ T0_CO(); } break; case 28: { /* compute-Finished-inner */ int prf_id = T0_POP(); int from_client = T0_POPi(); unsigned char tmp[48]; br_tls_prf_seed_chunk seed; br_tls_prf_impl prf = br_ssl_engine_get_PRF(ENG, prf_id); seed.data = tmp; if (ENG->session.version >= BR_TLS12) { seed.len = br_multihash_out(&ENG->mhash, prf_id, tmp); } else { br_multihash_out(&ENG->mhash, br_md5_ID, tmp); br_multihash_out(&ENG->mhash, br_sha1_ID, tmp + 16); seed.len = 36; } prf(ENG->pad, 12, ENG->session.master_secret, sizeof ENG->session.master_secret, from_client ? "client finished" : "server finished", 1, &seed); } break; case 29: { /* compute-hash-CV */ int i; for (i = 1; i <= 6; i ++) { br_multihash_out(&ENG->mhash, i, ENG->pad + HASH_PAD_OFF[i - 1]); } } break; case 30: { /* copy-cert-chunk */ size_t clen; clen = ENG->cert_len; if (clen > sizeof ENG->pad) { clen = sizeof ENG->pad; } memcpy(ENG->pad, ENG->cert_cur, clen); ENG->cert_cur += clen; ENG->cert_len -= clen; T0_PUSH(clen); } break; case 31: { /* copy-dn-chunk */ size_t clen; clen = _src_ssl_ssl_hs_server_cCTX->cur_dn_len; if (clen > sizeof ENG->pad) { clen = sizeof ENG->pad; } memcpy(ENG->pad, _src_ssl_ssl_hs_server_cCTX->cur_dn, clen); _src_ssl_ssl_hs_server_cCTX->cur_dn += clen; _src_ssl_ssl_hs_server_cCTX->cur_dn_len -= clen; T0_PUSH(clen); } break; case 32: { /* copy-hash-CV */ int id = T0_POP(); size_t off, len; if (id == 0) { off = 0; len = 36; } else { if (br_multihash_getimpl(&ENG->mhash, id) == 0) { T0_PUSH(0); T0_RET(); } off = HASH_PAD_OFF[id - 1]; len = HASH_PAD_OFF[id] - off; } memcpy(_src_ssl_ssl_hs_server_cCTX->hash_CV, ENG->pad + off, len); _src_ssl_ssl_hs_server_cCTX->hash_CV_len = len; _src_ssl_ssl_hs_server_cCTX->hash_CV_id = id; T0_PUSHi(-1); } break; case 33: { /* copy-protocol-name */ size_t idx = T0_POP(); size_t len = strlen(ENG->protocol_names[idx]); memcpy(ENG->pad, ENG->protocol_names[idx], len); T0_PUSH(len); } break; case 34: { /* data-get8 */ size_t addr = T0_POP(); T0_PUSH(_src_ssl_ssl_hs_server_ct0_datablock[addr]); } break; case 35: { /* discard-input */ ENG->hlen_in = 0; } break; case 36: { /* do-ecdh */ int prf_id = T0_POPi(); size_t len = T0_POP(); do_ecdh(_src_ssl_ssl_hs_server_cCTX, prf_id, ENG->pad, len); } break; case 37: { /* do-ecdhe-part1 */ int curve = T0_POPi(); T0_PUSHi(do_ecdhe_part1(_src_ssl_ssl_hs_server_cCTX, curve)); } break; case 38: { /* do-ecdhe-part2 */ int prf_id = T0_POPi(); size_t len = T0_POP(); do_ecdhe_part2(_src_ssl_ssl_hs_server_cCTX, prf_id, ENG->pad, len); } break; case 39: { /* do-rsa-decrypt */ int prf_id = T0_POPi(); size_t len = T0_POP(); do_rsa_decrypt(_src_ssl_ssl_hs_server_cCTX, prf_id, ENG->pad, len); } break; case 40: { /* do-static-ecdh */ do_static_ecdh(_src_ssl_ssl_hs_server_cCTX, T0_POP()); } break; case 41: { /* drop */ (void)T0_POP(); } break; case 42: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 43: { /* fail */ br_ssl_engine_fail(ENG, (int)T0_POPi()); T0_CO(); } break; case 44: { /* flush-record */ br_ssl_engine_flush_record(ENG); } break; case 45: { /* get-key-type-usages */ const br_x509_class *xc; const br_x509_pkey *pk; unsigned usages; xc = *(ENG->x509ctx); pk = xc->get_pkey(ENG->x509ctx, &usages); if (pk == NULL) { T0_PUSH(0); } else { T0_PUSH(pk->key_type | usages); } } break; case 46: { /* get16 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*(uint16_t *)(void *)((unsigned char *)ENG + addr)); } break; case 47: { /* get32 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*(uint32_t *)(void *)((unsigned char *)ENG + addr)); } break; case 48: { /* get8 */ size_t addr = (size_t)T0_POP(); T0_PUSH(*((unsigned char *)ENG + addr)); } break; case 49: { /* has-input? */ T0_PUSHi(-(ENG->hlen_in != 0)); } break; case 50: { /* memcmp */ size_t len = (size_t)T0_POP(); void *addr2 = (unsigned char *)ENG + (size_t)T0_POP(); void *addr1 = (unsigned char *)ENG + (size_t)T0_POP(); int x = memcmp(addr1, addr2, len); T0_PUSH((uint32_t)-(x == 0)); } break; case 51: { /* memcpy */ size_t len = (size_t)T0_POP(); void *src = (unsigned char *)ENG + (size_t)T0_POP(); void *dst = (unsigned char *)ENG + (size_t)T0_POP(); memcpy(dst, src, len); } break; case 52: { /* _src_ssl_ssl_hs_server_cmkrand */ size_t len = (size_t)T0_POP(); void *addr = (unsigned char *)ENG + (size_t)T0_POP(); br_hmac_drbg_generate(&ENG->rng, addr, len); } break; case 53: { /* more-incoming-bytes? */ T0_PUSHi(ENG->hlen_in != 0 || !br_ssl_engine_recvrec_finished(ENG)); } break; case 54: { /* multihash-init */ br_multihash_init(&ENG->mhash); } break; case 55: { /* neg */ uint32_t a = T0_POP(); T0_PUSH(-a); } break; case 56: { /* not */ uint32_t a = T0_POP(); T0_PUSH(~a); } break; case 57: { /* or */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a | b); } break; case 58: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 59: { /* pick */ T0_PICK(T0_POP()); } break; case 60: { /* read-chunk-native */ size_t clen = ENG->hlen_in; if (clen > 0) { uint32_t addr, len; len = T0_POP(); addr = T0_POP(); if ((size_t)len < clen) { clen = (size_t)len; } memcpy((unsigned char *)ENG + addr, ENG->hbuf_in, clen); if (ENG->record_type_in == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, ENG->hbuf_in, clen); } T0_PUSH(addr + (uint32_t)clen); T0_PUSH(len - (uint32_t)clen); ENG->hbuf_in += clen; ENG->hlen_in -= clen; } } break; case 61: { /* read8-native */ if (ENG->hlen_in > 0) { unsigned char x; x = *ENG->hbuf_in ++; if (ENG->record_type_in == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, &x, 1); } T0_PUSH(x); ENG->hlen_in --; } else { T0_PUSHi(-1); } } break; case 62: { /* save-session */ if (_src_ssl_ssl_hs_server_cCTX->cache_vtable != NULL) { (*_src_ssl_ssl_hs_server_cCTX->cache_vtable)->save( _src_ssl_ssl_hs_server_cCTX->cache_vtable, _src_ssl_ssl_hs_server_cCTX, &ENG->session); } } break; case 63: { /* set-max-frag-len */ size_t max_frag_len = T0_POP(); br_ssl_engine_new_max_frag_len(ENG, max_frag_len); /* * We must adjust our own output limit. Since we call this only * after receiving a ClientHello and before beginning to send * the ServerHello, the next output record should be empty at * that point, so we can use max_frag_len as a limit. */ if (ENG->hlen_out > max_frag_len) { ENG->hlen_out = max_frag_len; } } break; case 64: { /* set16 */ size_t addr = (size_t)T0_POP(); *(uint16_t *)(void *)((unsigned char *)ENG + addr) = (uint16_t)T0_POP(); } break; case 65: { /* set32 */ size_t addr = (size_t)T0_POP(); *(uint32_t *)(void *)((unsigned char *)ENG + addr) = (uint32_t)T0_POP(); } break; case 66: { /* set8 */ size_t addr = (size_t)T0_POP(); *((unsigned char *)ENG + addr) = (unsigned char)T0_POP(); } break; case 67: { /* supported-curves */ uint32_t x = ENG->iec == NULL ? 0 : ENG->iec->supported_curves; T0_PUSH(x); } break; case 68: { /* supported-hash-functions */ int i; unsigned x, num; x = 0; num = 0; for (i = br_sha1_ID; i <= br_sha512_ID; i ++) { if (br_multihash_getimpl(&ENG->mhash, i)) { x |= 1U << i; num ++; } } T0_PUSH(x); T0_PUSH(num); } break; case 69: { /* supports-ecdsa? */ T0_PUSHi(-(ENG->iecdsa != 0)); } break; case 70: { /* supports-rsa-sign? */ T0_PUSHi(-(ENG->irsavrfy != 0)); } break; case 71: { /* swap */ T0_SWAP(); } break; case 72: { /* switch-aesccm-in */ int is_client, prf_id; unsigned cipher_key_len, tag_len; tag_len = T0_POP(); cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_ccm_in(ENG, is_client, prf_id, ENG->iaes_ctrcbc, cipher_key_len, tag_len); } break; case 73: { /* switch-aesccm-out */ int is_client, prf_id; unsigned cipher_key_len, tag_len; tag_len = T0_POP(); cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_ccm_out(ENG, is_client, prf_id, ENG->iaes_ctrcbc, cipher_key_len, tag_len); } break; case 74: { /* switch-aesgcm-in */ int is_client, prf_id; unsigned cipher_key_len; cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_gcm_in(ENG, is_client, prf_id, ENG->iaes_ctr, cipher_key_len); } break; case 75: { /* switch-aesgcm-out */ int is_client, prf_id; unsigned cipher_key_len; cipher_key_len = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_gcm_out(ENG, is_client, prf_id, ENG->iaes_ctr, cipher_key_len); } break; case 76: { /* switch-cbc-in */ int is_client, prf_id, mac_id, aes; unsigned cipher_key_len; cipher_key_len = T0_POP(); aes = T0_POP(); mac_id = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_cbc_in(ENG, is_client, prf_id, mac_id, aes ? ENG->iaes_cbcdec : ENG->ides_cbcdec, cipher_key_len); } break; case 77: { /* switch-cbc-out */ int is_client, prf_id, mac_id, aes; unsigned cipher_key_len; cipher_key_len = T0_POP(); aes = T0_POP(); mac_id = T0_POP(); prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_cbc_out(ENG, is_client, prf_id, mac_id, aes ? ENG->iaes_cbcenc : ENG->ides_cbcenc, cipher_key_len); } break; case 78: { /* switch-chapol-in */ int is_client, prf_id; prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_chapol_in(ENG, is_client, prf_id); } break; case 79: { /* switch-chapol-out */ int is_client, prf_id; prf_id = T0_POP(); is_client = T0_POP(); br_ssl_engine_switch_chapol_out(ENG, is_client, prf_id); } break; case 80: { /* ta-names-total-length */ size_t u, len; len = 0; if (_src_ssl_ssl_hs_server_cCTX->ta_names != NULL) { for (u = 0; u < _src_ssl_ssl_hs_server_cCTX->num_tas; u ++) { len += _src_ssl_ssl_hs_server_cCTX->ta_names[u].len + 2; } } else if (_src_ssl_ssl_hs_server_cCTX->tas != NULL) { for (u = 0; u < _src_ssl_ssl_hs_server_cCTX->num_tas; u ++) { len += _src_ssl_ssl_hs_server_cCTX->tas[u].dn.len + 2; } } T0_PUSH(len); } break; case 81: { /* test-protocol-name */ size_t len = T0_POP(); size_t u; for (u = 0; u < ENG->protocol_names_num; u ++) { const char *name; name = ENG->protocol_names[u]; if (len == strlen(name) && memcmp(ENG->pad, name, len) == 0) { T0_PUSH(u); T0_RET(); } } T0_PUSHi(-1); } break; case 82: { /* total-chain-length */ size_t u; uint32_t total; total = 0; for (u = 0; u < ENG->chain_len; u ++) { total += 3 + (uint32_t)ENG->chain[u].data_len; } T0_PUSH(total); } break; case 83: { /* u< */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a < b)); } break; case 84: { /* u>> */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x >> c); } break; case 85: { /* verify-CV-sig */ int err; err = verify_CV_sig(_src_ssl_ssl_hs_server_cCTX, T0_POP()); T0_PUSHi(err); } break; case 86: { /* write-blob-chunk */ size_t clen = ENG->hlen_out; if (clen > 0) { uint32_t addr, len; len = T0_POP(); addr = T0_POP(); if ((size_t)len < clen) { clen = (size_t)len; } memcpy(ENG->hbuf_out, (unsigned char *)ENG + addr, clen); if (ENG->record_type_out == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, ENG->hbuf_out, clen); } T0_PUSH(addr + (uint32_t)clen); T0_PUSH(len - (uint32_t)clen); ENG->hbuf_out += clen; ENG->hlen_out -= clen; } } break; case 87: { /* write8-native */ unsigned char x; x = (unsigned char)T0_POP(); if (ENG->hlen_out > 0) { if (ENG->record_type_out == BR_SSL_HANDSHAKE) { br_multihash_update(&ENG->mhash, &x, 1); } *ENG->hbuf_out ++ = x; ENG->hlen_out --; T0_PUSHi(-1); } else { T0_PUSHi(0); } } break; case 88: { /* x509-append */ const br_x509_class *xc; size_t len; xc = *(ENG->x509ctx); len = T0_POP(); xc->append(ENG->x509ctx, ENG->pad, len); } break; case 89: { /* x509-end-cert */ const br_x509_class *xc; xc = *(ENG->x509ctx); xc->end_cert(ENG->x509ctx); } break; case 90: { /* x509-end-chain */ const br_x509_class *xc; xc = *(ENG->x509ctx); T0_PUSH(xc->end_chain(ENG->x509ctx)); } break; case 91: { /* x509-start-cert */ const br_x509_class *xc; xc = *(ENG->x509ctx); xc->start_cert(ENG->x509ctx, T0_POP()); } break; case 92: { /* x509-start-chain */ const br_x509_class *xc; uint32_t bc; bc = T0_POP(); xc = *(ENG->x509ctx); xc->start_chain(ENG->x509ctx, bc ? ENG->server_name : NULL); } break; } } else { _src_ssl_ssl_hs_server_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->dp = dp; ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->rp = rp; ((_src_ssl_ssl_hs_server_ct0_context *)t0ctx)->ip = ip; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_sslio_init(br_sslio_context *ctx, br_ssl_engine_context *engine, int (*low_read)(void *read_context, unsigned char *data, size_t len), void *read_context, int (*low_write)(void *write_context, const unsigned char *data, size_t len), void *write_context) { ctx->engine = engine; ctx->low_read = low_read; ctx->read_context = read_context; ctx->low_write = low_write; ctx->write_context = write_context; } /* * Run the engine, until the specified target state is achieved, or * an error occurs. The target state is SENDAPP, RECVAPP, or the * combination of both (the combination matches either). When a match is * achieved, this function returns 0. On error, it returns -1. */ static int run_until(br_sslio_context *ctx, unsigned target) { for (;;) { unsigned state; state = br_ssl_engine_current_state(ctx->engine); if (state & BR_SSL_CLOSED) { return -1; } /* * If there is some record data to send, do it. This takes * precedence over everything else. */ if (state & BR_SSL_SENDREC) { unsigned char *buf; size_t len; int wlen; buf = br_ssl_engine_sendrec_buf(ctx->engine, &len); wlen = ctx->low_write(ctx->write_context, buf, len); if (wlen < 0) { /* * If we received a close_notify and we * still send something, then we have our * own response close_notify to send, and * the peer is allowed by RFC 5246 not to * wait for it. */ if (!ctx->engine->shutdown_recv) { br_ssl_engine_fail( ctx->engine, BR_ERR_IO); } return -1; } if (wlen > 0) { br_ssl_engine_sendrec_ack(ctx->engine, wlen); } continue; } /* * If we reached our target, then we are finished. */ if (state & target) { return 0; } /* * If some application data must be read, and we did not * exit, then this means that we are trying to write data, * and that's not possible until the application data is * read. This may happen if using a shared in/out buffer, * and the underlying protocol is not strictly half-duplex. * This is unrecoverable here, so we report an error. */ if (state & BR_SSL_RECVAPP) { return -1; } /* * If we reached that point, then either we are trying * to read data and there is some, or the engine is stuck * until a new record is obtained. */ if (state & BR_SSL_RECVREC) { unsigned char *buf; size_t len; int rlen; buf = br_ssl_engine_recvrec_buf(ctx->engine, &len); rlen = ctx->low_read(ctx->read_context, buf, len); if (rlen < 0) { br_ssl_engine_fail(ctx->engine, BR_ERR_IO); return -1; } if (rlen > 0) { br_ssl_engine_recvrec_ack(ctx->engine, rlen); } continue; } /* * We can reach that point if the target RECVAPP, and * the state contains SENDAPP only. This may happen with * a shared in/out buffer. In that case, we must flush * the buffered data to "make room" for a new incoming * record. */ br_ssl_engine_flush(ctx->engine, 0); } } /* see bearssl_ssl.h */ int br_sslio_read(br_sslio_context *ctx, void *dst, size_t len) { unsigned char *buf; size_t alen; if (len == 0) { return 0; } if (run_until(ctx, BR_SSL_RECVAPP) < 0) { return -1; } buf = br_ssl_engine_recvapp_buf(ctx->engine, &alen); if (alen > len) { alen = len; } memcpy(dst, buf, alen); br_ssl_engine_recvapp_ack(ctx->engine, alen); return (int)alen; } /* see bearssl_ssl.h */ int br_sslio_read_all(br_sslio_context *ctx, void *dst, size_t len) { unsigned char *buf; buf = (unsigned char*)dst; while (len > 0) { int rlen; rlen = br_sslio_read(ctx, buf, len); if (rlen < 0) { return -1; } buf += rlen; len -= (size_t)rlen; } return 0; } /* see bearssl_ssl.h */ int br_sslio_write(br_sslio_context *ctx, const void *src, size_t len) { unsigned char *buf; size_t alen; if (len == 0) { return 0; } if (run_until(ctx, BR_SSL_SENDAPP) < 0) { return -1; } buf = br_ssl_engine_sendapp_buf(ctx->engine, &alen); if (alen > len) { alen = len; } memcpy(buf, src, alen); br_ssl_engine_sendapp_ack(ctx->engine, alen); return (int)alen; } /* see bearssl_ssl.h */ int br_sslio_write_all(br_sslio_context *ctx, const void *src, size_t len) { const unsigned char *buf; buf = (const unsigned char*)src; while (len > 0) { int wlen; wlen = br_sslio_write(ctx, buf, len); if (wlen < 0) { return -1; } buf += wlen; len -= (size_t)wlen; } return 0; } /* see bearssl_ssl.h */ int br_sslio_flush(br_sslio_context *ctx) { /* * We trigger a flush. We know the data is gone when there is * no longer any record data to send, and we can either read * or write application data. The call to run_until() does the * job because it ensures that any assembled record data is * first sent down the wire before considering anything else. */ br_ssl_engine_flush(ctx->engine, 0); return run_until(ctx, BR_SSL_SENDAPP | BR_SSL_RECVAPP); } /* see bearssl_ssl.h */ int br_sslio_close(br_sslio_context *ctx) { br_ssl_engine_close(ctx->engine); while (br_ssl_engine_current_state(ctx->engine) != BR_SSL_CLOSED) { /* * Discard any incoming application data. */ size_t len; run_until(ctx, BR_SSL_RECVAPP); if (br_ssl_engine_recvapp_buf(ctx->engine, &len) != NULL) { br_ssl_engine_recvapp_ack(ctx->engine, len); } } return br_ssl_engine_last_error(ctx->engine) == BR_ERR_OK; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Supported cipher suites that use SHA-384 for the PRF when selected * for TLS 1.2. All other cipher suites are deemed to use SHA-256. */ static const uint16_t suites_sha384[] = { BR_TLS_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 }; /* see bearssl_ssl.h */ int br_ssl_key_export(br_ssl_engine_context *cc, void *dst, size_t len, const char *label, const void *context, size_t context_len) { br_tls_prf_seed_chunk chunks[4]; br_tls_prf_impl iprf; size_t num_chunks, u; unsigned char tmp[2]; int prf_id; if (cc->application_data != 1) { return 0; } chunks[0].data = cc->client_random; chunks[0].len = sizeof cc->client_random; chunks[1].data = cc->server_random; chunks[1].len = sizeof cc->server_random; if (context != NULL) { br_enc16be(tmp, (unsigned)context_len); chunks[2].data = tmp; chunks[2].len = 2; chunks[3].data = context; chunks[3].len = context_len; num_chunks = 4; } else { num_chunks = 2; } prf_id = BR_SSLPRF_SHA256; for (u = 0; u < (sizeof suites_sha384) / sizeof(uint16_t); u ++) { if (suites_sha384[u] == cc->session.cipher_suite) { prf_id = BR_SSLPRF_SHA384; } } iprf = br_ssl_engine_get_PRF(cc, prf_id); iprf(dst, len, cc->session.master_secret, sizeof cc->session.master_secret, label, num_chunks, chunks); return 1; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Each entry consists in a fixed number of bytes. Entries are concatenated * in the store block. "Addresses" are really offsets in the block, * expressed over 32 bits (so the cache may have size at most 4 GB, which * "ought to be enough for everyone"). The "null address" is 0xFFFFFFFF. * Note that since the storage block alignment is in no way guaranteed, we * perform only accesses that can handle unaligned data. * * Two concurrent data structures are maintained: * * -- Entries are organised in a doubly-linked list; saved entries are added * at the head, and loaded entries are moved to the head. Eviction uses * the list tail (this is the LRU algorithm). * * -- Entries are indexed with a binary tree: all left descendants of a * node have a lower session ID (in lexicographic order), while all * right descendants have a higher session ID. The tree is heuristically * balanced. * * Entry format: * * session ID 32 bytes * master secret 48 bytes * protocol version 2 bytes (big endian) * cipher suite 2 bytes (big endian) * list prev 4 bytes (big endian) * list next 4 bytes (big endian) * tree left child 4 bytes (big endian) * tree right child 4 bytes (big endian) * * If an entry has a protocol version set to 0, then it is "disabled": * it was a session pushed to the cache at some point, but it has * been explicitly removed. * * We need to keep the tree balanced because an attacker could make * handshakes, selecting some specific sessions (by reusing them) to * try to make us make an imbalanced tree that makes lookups expensive * (a denial-of-service attack that would persist as long as the cache * remains, i.e. even after the attacker made all his connections). * To do that, we replace the session ID (or the start of the session ID) * with a HMAC value computed over the replaced part; the hash function * implementation and the key are obtained from the server context upon * first save() call. * * Theoretically, an attacker could use the exact timing of the lookup * to infer the current tree topology, and try to revive entries to make * it as unbalanced as possible. However, since the session ID are * chosen randomly by the server, and the attacker cannot see the * indexing values and must thus rely on blind selection, it should be * exponentially difficult for the attacker to maintain a large * imbalance. */ #define SESSION_ID_LEN 32 #define MASTER_SECRET_LEN 48 #define SESSION_ID_OFF 0 #define MASTER_SECRET_OFF 32 #define VERSION_OFF 80 #define CIPHER_SUITE_OFF 82 #define LIST_PREV_OFF 84 #define LIST_NEXT_OFF 88 #define TREE_LEFT_OFF 92 #define TREE_RIGHT_OFF 96 #define LRU_ENTRY_LEN 100 #define ADDR_NULL ((uint32_t)-1) #define GETSET(name, off) \ static inline uint32_t get_ ## name(br_ssl_session_cache_lru *cc, uint32_t x) \ { \ return br_dec32be(cc->store + x + (off)); \ } \ static inline void set_ ## name(br_ssl_session_cache_lru *cc, \ uint32_t x, uint32_t val) \ { \ br_enc32be(cc->store + x + (off), val); \ } GETSET(prev, LIST_PREV_OFF) GETSET(next, LIST_NEXT_OFF) GETSET(left, TREE_LEFT_OFF) GETSET(right, TREE_RIGHT_OFF) /* * Transform the session ID by replacing the first N bytes with a HMAC * value computed over these bytes, using the random key K (the HMAC * value is truncated if needed). HMAC will use the same hash function * as the DRBG in the SSL server context, so with SHA-256, SHA-384, * or SHA-1, depending on what is available. * * The risk of collision is considered too small to be a concern; and * the impact of a collision is low (the handshake won't succeed). This * risk is much lower than any transmission error, which would lead to * the same consequences. * * Source and destination arrays msut be disjoint. */ static void mask_id(br_ssl_session_cache_lru *cc, const unsigned char *src, unsigned char *dst) { br_hmac_key_context hkc; br_hmac_context hc; memcpy(dst, src, SESSION_ID_LEN); br_hmac_key_init(&hkc, cc->hash, cc->index_key, sizeof cc->index_key); br_hmac_init(&hc, &hkc, SESSION_ID_LEN); br_hmac_update(&hc, src, SESSION_ID_LEN); br_hmac_out(&hc, dst); } /* * Find a node by ID. Returned value is the node address, or ADDR_NULL if * the node is not found. * * If addr_link is not NULL, then '*addr_link' is set to the address of the * last followed link. If the found node is the root, or if the tree is * empty, then '*addr_link' is set to ADDR_NULL. */ static uint32_t find_node(br_ssl_session_cache_lru *cc, const unsigned char *id, uint32_t *addr_link) { uint32_t x, y; x = cc->root; y = ADDR_NULL; while (x != ADDR_NULL) { int r; r = memcmp(id, cc->store + x + SESSION_ID_OFF, SESSION_ID_LEN); if (r < 0) { y = x + TREE_LEFT_OFF; x = get_left(cc, x); } else if (r == 0) { if (addr_link != NULL) { *addr_link = y; } return x; } else { y = x + TREE_RIGHT_OFF; x = get_right(cc, x); } } if (addr_link != NULL) { *addr_link = y; } return ADDR_NULL; } /* * For node x, find its replacement upon removal. * * -- If node x has no child, then this returns ADDR_NULL. * -- Otherwise, if node x has a left child, then the replacement is the * rightmost left-descendent. * -- Otherwise, the replacement is the leftmost right-descendent. * * If a node is returned, then '*al' is set to the address of the field * that points to that node. Otherwise (node x has no child), '*al' is * set to ADDR_NULL. * * Note that the replacement node, when found, is always a descendent * of node 'x', so it cannot be the tree root. Thus, '*al' can be set * to ADDR_NULL only when no node is found and ADDR_NULL is returned. */ static uint32_t find_replacement_node(br_ssl_session_cache_lru *cc, uint32_t x, uint32_t *al) { uint32_t y1, y2; y1 = get_left(cc, x); if (y1 != ADDR_NULL) { y2 = x + TREE_LEFT_OFF; for (;;) { uint32_t z; z = get_right(cc, y1); if (z == ADDR_NULL) { *al = y2; return y1; } y2 = y1 + TREE_RIGHT_OFF; y1 = z; } } y1 = get_right(cc, x); if (y1 != ADDR_NULL) { y2 = x + TREE_RIGHT_OFF; for (;;) { uint32_t z; z = get_left(cc, y1); if (z == ADDR_NULL) { *al = y2; return y1; } y2 = y1 + TREE_LEFT_OFF; y1 = z; } } *al = ADDR_NULL; return ADDR_NULL; } /* * Set the link at address 'alx' to point to node 'x'. If 'alx' is * ADDR_NULL, then this sets the tree root to 'x'. */ static inline void set_link(br_ssl_session_cache_lru *cc, uint32_t alx, uint32_t x) { if (alx == ADDR_NULL) { cc->root = x; } else { br_enc32be(cc->store + alx, x); } } /* * Remove node 'x' from the tree. This function shall not be called if * node 'x' is not part of the tree. */ static void remove_node(br_ssl_session_cache_lru *cc, uint32_t x) { uint32_t alx, y, aly; /* * Removal algorithm: * ------------------ * * - If we remove the root, then the tree becomes empty. * * - If the removed node has no child, then we can simply remove * it, with nothing else to do. * * - Otherwise, the removed node must be replaced by either its * rightmost left-descendent, or its leftmost right-descendent. * The replacement node itself must be removed from its current * place. By definition, that replacement node has either no * child, or at most a single child that will replace it in the * tree. */ /* * Find node back and its ancestor link. If the node was the * root, then alx is set to ADDR_NULL. */ find_node(cc, cc->store + x + SESSION_ID_OFF, &alx); /* * Find replacement node 'y', and 'aly' is set to the address of * the link to that replacement node. If the removed node has no * child, then both 'y' and 'aly' are set to ADDR_NULL. */ y = find_replacement_node(cc, x, &aly); if (y != ADDR_NULL) { uint32_t z; /* * The unlinked replacement node may have one child (but * not two) that takes its place. */ z = get_left(cc, y); if (z == ADDR_NULL) { z = get_right(cc, y); } set_link(cc, aly, z); /* * Link the replacement node in its new place, overwriting * the current link to the node 'x' (which removes 'x'). */ set_link(cc, alx, y); /* * The replacement node adopts the left and right children * of the removed node. Note that this also works even if * the replacement node was a direct descendent of the * removed node, since we unlinked it previously. */ set_left(cc, y, get_left(cc, x)); set_right(cc, y, get_right(cc, x)); } else { /* * No replacement, we simply unlink the node 'x'. */ set_link(cc, alx, ADDR_NULL); } } static void lru_save(const br_ssl_session_cache_class **ctx, br_ssl_server_context *server_ctx, const br_ssl_session_parameters *params) { br_ssl_session_cache_lru *cc; unsigned char id[SESSION_ID_LEN]; uint32_t x, alx; cc = (br_ssl_session_cache_lru *)ctx; /* * If the buffer is too small, we don't record anything. This * test avoids problems in subsequent code. */ if (cc->store_len < LRU_ENTRY_LEN) { return; } /* * Upon the first save in a session cache instance, we obtain * a random key for our indexing. */ if (!cc->init_done) { br_hmac_drbg_generate(&server_ctx->eng.rng, cc->index_key, sizeof cc->index_key); cc->hash = br_hmac_drbg_get_hash(&server_ctx->eng.rng); cc->init_done = 1; } mask_id(cc, params->session_id, id); /* * Look for the node in the tree. If the same ID is already used, * then reject it. This is a collision event, which should be * exceedingly rare. * Note: we do NOT record the emplacement here, because the * removal of an entry may change the tree topology. */ if (find_node(cc, id, NULL) != ADDR_NULL) { return; } /* * Find some room for the new parameters. If the cache is not * full yet, add it to the end of the area and bump the pointer up. * Otherwise, evict the list tail entry. Note that we already * filtered out the case of a ridiculously small buffer that * cannot hold any entry at all; thus, if there is no room for an * extra entry, then the cache cannot be empty. */ if (cc->store_ptr > (cc->store_len - LRU_ENTRY_LEN)) { /* * Evict tail. If the buffer has room for a single entry, * then this may also be the head. */ x = cc->tail; cc->tail = get_prev(cc, x); if (cc->tail == ADDR_NULL) { cc->head = ADDR_NULL; } else { set_next(cc, cc->tail, ADDR_NULL); } /* * Remove the node from the tree. */ remove_node(cc, x); } else { /* * Allocate room for new node. */ x = cc->store_ptr; cc->store_ptr += LRU_ENTRY_LEN; } /* * Find the emplacement for the new node, and link it. */ find_node(cc, id, &alx); set_link(cc, alx, x); set_left(cc, x, ADDR_NULL); set_right(cc, x, ADDR_NULL); /* * New entry becomes new list head. It may also become the list * tail if the cache was empty at that point. */ if (cc->head == ADDR_NULL) { cc->tail = x; } else { set_prev(cc, cc->head, x); } set_prev(cc, x, ADDR_NULL); set_next(cc, x, cc->head); cc->head = x; /* * Fill data in the entry. */ memcpy(cc->store + x + SESSION_ID_OFF, id, SESSION_ID_LEN); memcpy(cc->store + x + MASTER_SECRET_OFF, params->master_secret, MASTER_SECRET_LEN); br_enc16be(cc->store + x + VERSION_OFF, params->version); br_enc16be(cc->store + x + CIPHER_SUITE_OFF, params->cipher_suite); } static int lru_load(const br_ssl_session_cache_class **ctx, br_ssl_server_context *server_ctx, br_ssl_session_parameters *params) { br_ssl_session_cache_lru *cc; unsigned char id[SESSION_ID_LEN]; uint32_t x; (void)server_ctx; cc = (br_ssl_session_cache_lru *)ctx; if (!cc->init_done) { return 0; } mask_id(cc, params->session_id, id); x = find_node(cc, id, NULL); if (x != ADDR_NULL) { unsigned version; version = br_dec16be(cc->store + x + VERSION_OFF); if (version == 0) { /* * Entry is disabled, we pretend we did not find it. * Notably, we don't move it to the front of the * LRU list. */ return 0; } params->version = version; params->cipher_suite = br_dec16be( cc->store + x + CIPHER_SUITE_OFF); memcpy(params->master_secret, cc->store + x + MASTER_SECRET_OFF, MASTER_SECRET_LEN); if (x != cc->head) { /* * Found node is not at list head, so move * it to the head. */ uint32_t p, n; p = get_prev(cc, x); n = get_next(cc, x); set_next(cc, p, n); if (n == ADDR_NULL) { cc->tail = p; } else { set_prev(cc, n, p); } set_prev(cc, cc->head, x); set_next(cc, x, cc->head); set_prev(cc, x, ADDR_NULL); cc->head = x; } return 1; } return 0; } static const br_ssl_session_cache_class lru_class = { sizeof(br_ssl_session_cache_lru), &lru_save, &lru_load }; /* see inner.h */ void br_ssl_session_cache_lru_init(br_ssl_session_cache_lru *cc, unsigned char *store, size_t store_len) { cc->vtable = &lru_class; cc->store = store; cc->store_len = store_len; cc->store_ptr = 0; cc->init_done = 0; cc->head = ADDR_NULL; cc->tail = ADDR_NULL; cc->root = ADDR_NULL; } /* see bearssl_ssl.h */ void br_ssl_session_cache_lru_forget( br_ssl_session_cache_lru *cc, const unsigned char *id) { unsigned char mid[SESSION_ID_LEN]; uint32_t addr; /* * If the cache is not initialised yet, then it is empty, and * there is nothing to forget. */ if (!cc->init_done) { return; } /* * Look for the node in the tree. If found, the entry is marked * as "disabled"; it will be reused in due course, as it ages * through the list. * * We do not go through the complex moves of actually releasing * the entry right away because explicitly forgetting sessions * should be a rare event, meant mostly for testing purposes, * so this is not worth the extra code size. */ mask_id(cc, id, mid); addr = find_node(cc, mid, NULL); if (addr != ADDR_NULL) { br_enc16be(cc->store + addr + VERSION_OFF, 0); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static void in_cbc_init(br_sslrec_in_cbc_context *cc, const br_block_cbcdec_class *bc_impl, const void *bc_key, size_t bc_key_len, const br_hash_class *dig_impl, const void *mac_key, size_t mac_key_len, size_t mac_out_len, const void *iv) { cc->vtable = &br_sslrec_in_cbc_vtable; cc->seq = 0; bc_impl->init(&cc->bc.vtable, bc_key, bc_key_len); br_hmac_key_init(&cc->mac, dig_impl, mac_key, mac_key_len); cc->mac_len = mac_out_len; if (iv == NULL) { memset(cc->iv, 0, sizeof cc->iv); cc->explicit_IV = 1; } else { memcpy(cc->iv, iv, bc_impl->block_size); cc->explicit_IV = 0; } } static int cbc_check_length(const br_sslrec_in_cbc_context *cc, size_t rlen) { /* * Plaintext size: at most 16384 bytes * Padding: at most 256 bytes * MAC: mac_len extra bytes * TLS 1.1+: each record has an explicit IV * * Minimum length includes at least one byte of padding, and the * MAC. * * Total length must be a multiple of the block size. */ size_t blen; size_t min_len, max_len; blen = cc->bc.vtable->block_size; min_len = (blen + cc->mac_len) & ~(blen - 1); max_len = (16384 + 256 + cc->mac_len) & ~(blen - 1); if (cc->explicit_IV) { min_len += blen; max_len += blen; } return min_len <= rlen && rlen <= max_len; } /* * Rotate array buf[] of length 'len' to the left (towards low indices) * by 'num' bytes if ctl is 1; otherwise, leave it unchanged. This is * constant-time. 'num' MUST be lower than 'len'. 'len' MUST be lower * than or equal to 64. */ static void cond_rotate(uint32_t ctl, unsigned char *buf, size_t len, size_t num) { unsigned char tmp[64]; size_t u, v; for (u = 0, v = num; u < len; u ++) { tmp[u] = MUX(ctl, buf[v], buf[u]); if (++ v == len) { v = 0; } } memcpy(buf, tmp, len); } static unsigned char * cbc_decrypt(br_sslrec_in_cbc_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { /* * We represent all lengths on 32-bit integers, because: * -- SSL record lengths always fit in 32 bits; * -- our constant-time primitives operate on 32-bit integers. */ unsigned char *buf; uint32_t u, v, len, blen, min_len, max_len; uint32_t good, pad_len, rot_count, len_withmac, len_nomac; unsigned char tmp1[64], tmp2[64]; int i; br_hmac_context hc; buf = (unsigned char*)data; len = *data_len; blen = cc->bc.vtable->block_size; /* * Decrypt data, and skip the explicit IV (if applicable). Note * that the total length is supposed to have been verified by * the caller. If there is an explicit IV, then we actually * "decrypt" it using the implicit IV (from previous record), * which is useless but harmless. */ cc->bc.vtable->run(&cc->bc.vtable, cc->iv, data, len); if (cc->explicit_IV) { buf += blen; len -= blen; } /* * Compute minimum and maximum length of plaintext + MAC. These * lengths can be inferred from the outside: they are not secret. */ min_len = (cc->mac_len + 256 < len) ? len - 256 : cc->mac_len; max_len = len - 1; /* * Use the last decrypted byte to compute the actual payload * length. Take care not to overflow (we use unsigned types). */ pad_len = buf[max_len]; good = LE(pad_len, (uint32_t)(max_len - min_len)); len = MUX(good, (uint32_t)(max_len - pad_len), min_len); /* * Check padding contents: all padding bytes must be equal to * the value of pad_len. */ for (u = min_len; u < max_len; u ++) { good &= LT(u, len) | EQ(buf[u], pad_len); } /* * Extract the MAC value. This is done in one pass, but results * in a "rotated" MAC value depending on where it actually * occurs. The 'rot_count' value is set to the offset of the * first MAC byte within tmp1[]. * * min_len and max_len are also adjusted to the minimum and * maximum lengths of the plaintext alone (without the MAC). */ len_withmac = (uint32_t)len; len_nomac = len_withmac - cc->mac_len; min_len -= cc->mac_len; rot_count = 0; memset(tmp1, 0, cc->mac_len); v = 0; for (u = min_len; u < max_len; u ++) { tmp1[v] |= MUX(GE(u, len_nomac) & LT(u, len_withmac), buf[u], 0x00); rot_count = MUX(EQ(u, len_nomac), v, rot_count); if (++ v == cc->mac_len) { v = 0; } } max_len -= cc->mac_len; /* * Rotate back the MAC value. The loop below does the constant-time * rotation in time n*log n for a MAC output of length n. We assume * that the MAC output length is no more than 64 bytes, so the * rotation count fits on 6 bits. */ for (i = 5; i >= 0; i --) { uint32_t rc; rc = (uint32_t)1 << i; cond_rotate(rot_count >> i, tmp1, cc->mac_len, rc); rot_count &= ~rc; } /* * Recompute the HMAC value. The input is the concatenation of * the sequence number (8 bytes), the record header (5 bytes), * and the payload. * * At that point, min_len is the minimum plaintext length, but * max_len still includes the MAC length. */ br_enc64be(tmp2, cc->seq ++); tmp2[8] = (unsigned char)record_type; br_enc16be(tmp2 + 9, version); br_enc16be(tmp2 + 11, len_nomac); br_hmac_init(&hc, &cc->mac, cc->mac_len); br_hmac_update(&hc, tmp2, 13); br_hmac_outCT(&hc, buf, len_nomac, min_len, max_len, tmp2); /* * Compare the extracted and recomputed MAC values. */ for (u = 0; u < cc->mac_len; u ++) { good &= EQ0(tmp1[u] ^ tmp2[u]); } /* * Check that the plaintext length is valid. The previous * check was on the encrypted length, but the padding may have * turned shorter than expected. * * Once this final test is done, the critical "constant-time" * section ends and we can make conditional jumps again. */ good &= LE(len_nomac, 16384); if (!good) { return 0; } *data_len = len_nomac; return buf; } /* see bearssl_ssl.h */ const br_sslrec_in_cbc_class br_sslrec_in_cbc_vtable = { { sizeof(br_sslrec_in_cbc_context), (int (*)(const br_sslrec_in_class *const *, size_t)) &cbc_check_length, (unsigned char *(*)(const br_sslrec_in_class **, int, unsigned, void *, size_t *)) &cbc_decrypt }, (void (*)(const br_sslrec_in_cbc_class **, const br_block_cbcdec_class *, const void *, size_t, const br_hash_class *, const void *, size_t, size_t, const void *)) &in_cbc_init }; /* * For CBC output: * * -- With TLS 1.1+, there is an explicit IV. Generation method uses * HMAC, computed over the current sequence number, and the current MAC * key. The resulting value is truncated to the size of a block, and * added at the head of the plaintext; it will get encrypted along with * the data. This custom generation mechanism is "safe" under the * assumption that HMAC behaves like a random oracle; since the MAC for * a record is computed over the concatenation of the sequence number, * the record header and the plaintext, the HMAC-for-IV will not collide * with the normal HMAC. * * -- With TLS 1.0, for application data, we want to enforce a 1/n-1 * split, as a countermeasure against chosen-plaintext attacks. We thus * need to leave some room in the buffer for that extra record. */ static void out_cbc_init(br_sslrec_out_cbc_context *cc, const br_block_cbcenc_class *bc_impl, const void *bc_key, size_t bc_key_len, const br_hash_class *dig_impl, const void *mac_key, size_t mac_key_len, size_t mac_out_len, const void *iv) { cc->vtable = &br_sslrec_out_cbc_vtable; cc->seq = 0; bc_impl->init(&cc->bc.vtable, bc_key, bc_key_len); br_hmac_key_init(&cc->mac, dig_impl, mac_key, mac_key_len); cc->mac_len = mac_out_len; if (iv == NULL) { memset(cc->iv, 0, sizeof cc->iv); cc->explicit_IV = 1; } else { memcpy(cc->iv, iv, bc_impl->block_size); cc->explicit_IV = 0; } } static void cbc_max_plaintext(const br_sslrec_out_cbc_context *cc, size_t *start, size_t *end) { size_t blen, len; blen = cc->bc.vtable->block_size; if (cc->explicit_IV) { *start += blen; } else { *start += 4 + ((cc->mac_len + blen + 1) & ~(blen - 1)); } len = (*end - *start) & ~(blen - 1); len -= 1 + cc->mac_len; if (len > 16384) { len = 16384; } *end = *start + len; } static unsigned char * cbc_encrypt(br_sslrec_out_cbc_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf, *rbuf; size_t len, blen, plen; unsigned char tmp[13]; br_hmac_context hc; buf = (unsigned char*)data; len = *data_len; blen = cc->bc.vtable->block_size; /* * If using TLS 1.0, with more than one byte of plaintext, and * the record is application data, then we need to compute * a "split". We do not perform the split on other record types * because it turned out that some existing, deployed * implementations of SSL/TLS do not tolerate the splitting of * some message types (in particular the Finished message). * * If using TLS 1.1+, then there is an explicit IV. We produce * that IV by adding an extra initial plaintext block, whose * value is computed with HMAC over the record sequence number. */ if (cc->explicit_IV) { /* * We use here the fact that all the HMAC variants we * support can produce at least 16 bytes, while all the * block ciphers we support have blocks of no more than * 16 bytes. Thus, we can always truncate the HMAC output * down to the block size. */ br_enc64be(tmp, cc->seq); br_hmac_init(&hc, &cc->mac, blen); br_hmac_update(&hc, tmp, 8); br_hmac_out(&hc, buf - blen); rbuf = buf - blen - 5; } else { if (len > 1 && record_type == BR_SSL_APPLICATION_DATA) { /* * To do the split, we use a recursive invocation; * since we only give one byte to the inner call, * the recursion stops there. * * We need to compute the exact size of the extra * record, so that the two resulting records end up * being sequential in RAM. * * We use here the fact that cbc_max_plaintext() * adjusted the start offset to leave room for the * initial fragment. */ size_t xlen; rbuf = buf - 4 - ((cc->mac_len + blen + 1) & ~(blen - 1)); rbuf[0] = buf[0]; xlen = 1; rbuf = cbc_encrypt(cc, record_type, version, rbuf, &xlen); buf ++; len --; } else { rbuf = buf - 5; } } /* * Compute MAC. */ br_enc64be(tmp, cc->seq ++); tmp[8] = record_type; br_enc16be(tmp + 9, version); br_enc16be(tmp + 11, len); br_hmac_init(&hc, &cc->mac, cc->mac_len); br_hmac_update(&hc, tmp, 13); br_hmac_update(&hc, buf, len); br_hmac_out(&hc, buf + len); len += cc->mac_len; /* * Add padding. */ plen = blen - (len & (blen - 1)); memset(buf + len, (unsigned)plen - 1, plen); len += plen; /* * If an explicit IV is used, the corresponding extra block was * already put in place earlier; we just have to account for it * here. */ if (cc->explicit_IV) { buf -= blen; len += blen; } /* * Encrypt the whole thing. If there is an explicit IV, we also * encrypt it, which is fine (encryption of a uniformly random * block is still a uniformly random block). */ cc->bc.vtable->run(&cc->bc.vtable, cc->iv, buf, len); /* * Add the header and return. */ buf[-5] = record_type; br_enc16be(buf - 4, version); br_enc16be(buf - 2, len); *data_len = (size_t)((buf + len) - rbuf); return rbuf; } /* see bearssl_ssl.h */ const br_sslrec_out_cbc_class br_sslrec_out_cbc_vtable = { { sizeof(br_sslrec_out_cbc_context), (void (*)(const br_sslrec_out_class *const *, size_t *, size_t *)) &cbc_max_plaintext, (unsigned char *(*)(const br_sslrec_out_class **, int, unsigned, void *, size_t *)) &cbc_encrypt }, (void (*)(const br_sslrec_out_cbc_class **, const br_block_cbcenc_class *, const void *, size_t, const br_hash_class *, const void *, size_t, size_t, const void *)) &out_cbc_init }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * CCM initialisation. This does everything except setting the vtable, * which depends on whether this is a context for encrypting or for * decrypting. */ static void gen_ccm_init(br_sslrec_ccm_context *cc, const br_block_ctrcbc_class *bc_impl, const void *key, size_t key_len, const void *iv, size_t tag_len) { cc->seq = 0; bc_impl->init(&cc->bc.vtable, key, key_len); memcpy(cc->iv, iv, sizeof cc->iv); cc->tag_len = tag_len; } static void in_ccm_init(br_sslrec_ccm_context *cc, const br_block_ctrcbc_class *bc_impl, const void *key, size_t key_len, const void *iv, size_t tag_len) { cc->vtable.in = &br_sslrec_in_ccm_vtable; gen_ccm_init(cc, bc_impl, key, key_len, iv, tag_len); } static int ccm_check_length(const br_sslrec_ccm_context *cc, size_t rlen) { /* * CCM overhead is 8 bytes for nonce_explicit, and the tag * (normally 8 or 16 bytes, depending on cipher suite). */ size_t over; over = 8 + cc->tag_len; return rlen >= over && rlen <= (16384 + over); } static unsigned char * ccm_decrypt(br_sslrec_ccm_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { br_ccm_context zc; unsigned char *buf; unsigned char nonce[12], header[13]; size_t len; buf = (unsigned char *)data + 8; len = *data_len - (8 + cc->tag_len); /* * Make nonce (implicit + explicit parts). */ memcpy(nonce, cc->iv, sizeof cc->iv); memcpy(nonce + 4, data, 8); /* * Assemble synthetic header for the AAD. */ br_enc64be(header, cc->seq ++); header[8] = (unsigned char)record_type; br_enc16be(header + 9, version); br_enc16be(header + 11, len); /* * Perform CCM decryption. */ br_ccm_init(&zc, &cc->bc.vtable); br_ccm_reset(&zc, nonce, sizeof nonce, sizeof header, len, cc->tag_len); br_ccm_aad_inject(&zc, header, sizeof header); br_ccm_flip(&zc); br_ccm_run(&zc, 0, buf, len); if (!br_ccm_check_tag(&zc, buf + len)) { return NULL; } *data_len = len; return buf; } /* see bearssl_ssl.h */ const br_sslrec_in_ccm_class br_sslrec_in_ccm_vtable = { { sizeof(br_sslrec_ccm_context), (int (*)(const br_sslrec_in_class *const *, size_t)) &ccm_check_length, (unsigned char *(*)(const br_sslrec_in_class **, int, unsigned, void *, size_t *)) &ccm_decrypt }, (void (*)(const br_sslrec_in_ccm_class **, const br_block_ctrcbc_class *, const void *, size_t, const void *, size_t)) &in_ccm_init }; static void out_ccm_init(br_sslrec_ccm_context *cc, const br_block_ctrcbc_class *bc_impl, const void *key, size_t key_len, const void *iv, size_t tag_len) { cc->vtable.out = &br_sslrec_out_ccm_vtable; gen_ccm_init(cc, bc_impl, key, key_len, iv, tag_len); } static void ccm_max_plaintext(const br_sslrec_ccm_context *cc, size_t *start, size_t *end) { size_t len; *start += 8; len = *end - *start - cc->tag_len; if (len > 16384) { len = 16384; } *end = *start + len; } static unsigned char * ccm_encrypt(br_sslrec_ccm_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { br_ccm_context zc; unsigned char *buf; unsigned char nonce[12], header[13]; size_t len; buf = (unsigned char *)data; len = *data_len; /* * Make nonce; the explicit part is an encoding of the sequence * number. */ memcpy(nonce, cc->iv, sizeof cc->iv); br_enc64be(nonce + 4, cc->seq); /* * Assemble synthetic header for the AAD. */ br_enc64be(header, cc->seq ++); header[8] = (unsigned char)record_type; br_enc16be(header + 9, version); br_enc16be(header + 11, len); /* * Perform CCM encryption. */ br_ccm_init(&zc, &cc->bc.vtable); br_ccm_reset(&zc, nonce, sizeof nonce, sizeof header, len, cc->tag_len); br_ccm_aad_inject(&zc, header, sizeof header); br_ccm_flip(&zc); br_ccm_run(&zc, 1, buf, len); br_ccm_get_tag(&zc, buf + len); /* * Assemble header and adjust pointer/length. */ len += 8 + cc->tag_len; buf -= 13; memcpy(buf + 5, nonce + 4, 8); buf[0] = (unsigned char)record_type; br_enc16be(buf + 1, version); br_enc16be(buf + 3, len); *data_len = len + 5; return buf; } /* see bearssl_ssl.h */ const br_sslrec_out_ccm_class br_sslrec_out_ccm_vtable = { { sizeof(br_sslrec_ccm_context), (void (*)(const br_sslrec_out_class *const *, size_t *, size_t *)) &ccm_max_plaintext, (unsigned char *(*)(const br_sslrec_out_class **, int, unsigned, void *, size_t *)) &ccm_encrypt }, (void (*)(const br_sslrec_out_ccm_class **, const br_block_ctrcbc_class *, const void *, size_t, const void *, size_t)) &out_ccm_init }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static void gen_chapol_init(br_sslrec_chapol_context *cc, br_chacha20_run ichacha, br_poly1305_run ipoly, const void *key, const void *iv) { cc->seq = 0; cc->ichacha = ichacha; cc->ipoly = ipoly; memcpy(cc->key, key, sizeof cc->key); memcpy(cc->iv, iv, sizeof cc->iv); } static void gen_chapol_process(br_sslrec_chapol_context *cc, int record_type, unsigned version, void *data, size_t len, void *tag, int encrypt) { unsigned char header[13]; unsigned char nonce[12]; uint64_t seq; size_t u; seq = cc->seq ++; br_enc64be(header, seq); header[8] = (unsigned char)record_type; br_enc16be(header + 9, version); br_enc16be(header + 11, len); memcpy(nonce, cc->iv, 12); for (u = 0; u < 8; u ++) { nonce[11 - u] ^= (unsigned char)seq; seq >>= 8; } cc->ipoly(cc->key, nonce, data, len, header, sizeof header, tag, cc->ichacha, encrypt); } static void in_chapol_init(br_sslrec_chapol_context *cc, br_chacha20_run ichacha, br_poly1305_run ipoly, const void *key, const void *iv) { cc->vtable.in = &br_sslrec_in_chapol_vtable; gen_chapol_init(cc, ichacha, ipoly, key, iv); } static int chapol_check_length(const br_sslrec_chapol_context *cc, size_t rlen) { /* * Overhead is just the authentication tag (16 bytes). */ (void)cc; return rlen >= 16 && rlen <= (16384 + 16); } static unsigned char * chapol_decrypt(br_sslrec_chapol_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf; size_t u, len; unsigned char tag[16]; unsigned bad; buf = (unsigned char*)data; len = *data_len - 16; gen_chapol_process(cc, record_type, version, buf, len, tag, 0); bad = 0; for (u = 0; u < 16; u ++) { bad |= tag[u] ^ buf[len + u]; } if (bad) { return NULL; } *data_len = len; return buf; } /* see bearssl_ssl.h */ const br_sslrec_in_chapol_class br_sslrec_in_chapol_vtable = { { sizeof(br_sslrec_chapol_context), (int (*)(const br_sslrec_in_class *const *, size_t)) &chapol_check_length, (unsigned char *(*)(const br_sslrec_in_class **, int, unsigned, void *, size_t *)) &chapol_decrypt }, (void (*)(const br_sslrec_in_chapol_class **, br_chacha20_run, br_poly1305_run, const void *, const void *)) &in_chapol_init }; static void out_chapol_init(br_sslrec_chapol_context *cc, br_chacha20_run ichacha, br_poly1305_run ipoly, const void *key, const void *iv) { cc->vtable.out = &br_sslrec_out_chapol_vtable; gen_chapol_init(cc, ichacha, ipoly, key, iv); } static void chapol_max_plaintext(const br_sslrec_chapol_context *cc, size_t *start, size_t *end) { size_t len; (void)cc; len = *end - *start - 16; if (len > 16384) { len = 16384; } *end = *start + len; } static unsigned char * chapol_encrypt(br_sslrec_chapol_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf; size_t len; buf = (unsigned char*)data; len = *data_len; gen_chapol_process(cc, record_type, version, buf, len, buf + len, 1); buf -= 5; buf[0] = (unsigned char)record_type; br_enc16be(buf + 1, version); br_enc16be(buf + 3, len + 16); *data_len = len + 21; return buf; } /* see bearssl_ssl.h */ const br_sslrec_out_chapol_class br_sslrec_out_chapol_vtable = { { sizeof(br_sslrec_chapol_context), (void (*)(const br_sslrec_out_class *const *, size_t *, size_t *)) &chapol_max_plaintext, (unsigned char *(*)(const br_sslrec_out_class **, int, unsigned, void *, size_t *)) &chapol_encrypt }, (void (*)(const br_sslrec_out_chapol_class **, br_chacha20_run, br_poly1305_run, const void *, const void *)) &out_chapol_init }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * GCM initialisation. This does everything except setting the vtable, * which depends on whether this is a context for encrypting or for * decrypting. */ static void gen_gcm_init(br_sslrec_gcm_context *cc, const br_block_ctr_class *bc_impl, const void *key, size_t key_len, br_ghash gh_impl, const void *iv) { unsigned char tmp[12]; cc->seq = 0; bc_impl->init(&cc->bc.vtable, key, key_len); cc->gh = gh_impl; memcpy(cc->iv, iv, sizeof cc->iv); memset(cc->h, 0, sizeof cc->h); memset(tmp, 0, sizeof tmp); bc_impl->run(&cc->bc.vtable, tmp, 0, cc->h, sizeof cc->h); } static void in_gcm_init(br_sslrec_gcm_context *cc, const br_block_ctr_class *bc_impl, const void *key, size_t key_len, br_ghash gh_impl, const void *iv) { cc->vtable.in = &br_sslrec_in_gcm_vtable; gen_gcm_init(cc, bc_impl, key, key_len, gh_impl, iv); } static int gcm_check_length(const br_sslrec_gcm_context *cc, size_t rlen) { /* * GCM adds a fixed overhead: * 8 bytes for the nonce_explicit (before the ciphertext) * 16 bytes for the authentication tag (after the ciphertext) */ (void)cc; return rlen >= 24 && rlen <= (16384 + 24); } /* * Compute the authentication tag. The value written in 'tag' must still * be CTR-encrypted. */ static void do_tag(br_sslrec_gcm_context *cc, int record_type, unsigned version, void *data, size_t len, void *tag) { unsigned char header[13]; unsigned char footer[16]; /* * Compute authentication tag. Three elements must be injected in * sequence, each possibly 0-padded to reach a length multiple * of the block size: the 13-byte header (sequence number, record * type, protocol version, record length), the cipher text, and * the word containing the encodings of the bit lengths of the two * other elements. */ br_enc64be(header, cc->seq ++); header[8] = (unsigned char)record_type; br_enc16be(header + 9, version); br_enc16be(header + 11, len); br_enc64be(footer, (uint64_t)(sizeof header) << 3); br_enc64be(footer + 8, (uint64_t)len << 3); memset(tag, 0, 16); cc->gh(tag, cc->h, header, sizeof header); cc->gh(tag, cc->h, data, len); cc->gh(tag, cc->h, footer, sizeof footer); } /* * Do CTR encryption. This also does CTR encryption of a single block at * address 'xortag' with the counter value appropriate for the final * processing of the authentication tag. */ static void do_ctr(br_sslrec_gcm_context *cc, const void *nonce, void *data, size_t len, void *xortag) { unsigned char iv[12]; memcpy(iv, cc->iv, 4); memcpy(iv + 4, nonce, 8); cc->bc.vtable->run(&cc->bc.vtable, iv, 2, data, len); cc->bc.vtable->run(&cc->bc.vtable, iv, 1, xortag, 16); } static unsigned char * gcm_decrypt(br_sslrec_gcm_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf; size_t len, u; uint32_t bad; unsigned char tag[16]; buf = (unsigned char *)data + 8; len = *data_len - 24; do_tag(cc, record_type, version, buf, len, tag); do_ctr(cc, data, buf, len, tag); /* * Compare the computed tag with the value from the record. It * is possibly useless to do a constant-time comparison here, * but it does not hurt. */ bad = 0; for (u = 0; u < 16; u ++) { bad |= tag[u] ^ buf[len + u]; } if (bad) { return NULL; } *data_len = len; return buf; } /* see bearssl_ssl.h */ const br_sslrec_in_gcm_class br_sslrec_in_gcm_vtable = { { sizeof(br_sslrec_gcm_context), (int (*)(const br_sslrec_in_class *const *, size_t)) &gcm_check_length, (unsigned char *(*)(const br_sslrec_in_class **, int, unsigned, void *, size_t *)) &gcm_decrypt }, (void (*)(const br_sslrec_in_gcm_class **, const br_block_ctr_class *, const void *, size_t, br_ghash, const void *)) &in_gcm_init }; static void out_gcm_init(br_sslrec_gcm_context *cc, const br_block_ctr_class *bc_impl, const void *key, size_t key_len, br_ghash gh_impl, const void *iv) { cc->vtable.out = &br_sslrec_out_gcm_vtable; gen_gcm_init(cc, bc_impl, key, key_len, gh_impl, iv); } static void gcm_max_plaintext(const br_sslrec_gcm_context *cc, size_t *start, size_t *end) { size_t len; (void)cc; *start += 8; len = *end - *start - 16; if (len > 16384) { len = 16384; } *end = *start + len; } static unsigned char * gcm_encrypt(br_sslrec_gcm_context *cc, int record_type, unsigned version, void *data, size_t *data_len) { unsigned char *buf; size_t u, len; unsigned char tmp[16]; buf = (unsigned char *)data; len = *data_len; memset(tmp, 0, sizeof tmp); br_enc64be(buf - 8, cc->seq); do_ctr(cc, buf - 8, buf, len, tmp); do_tag(cc, record_type, version, buf, len, buf + len); for (u = 0; u < 16; u ++) { buf[len + u] ^= tmp[u]; } len += 24; buf -= 13; buf[0] = (unsigned char)record_type; br_enc16be(buf + 1, version); br_enc16be(buf + 3, len); *data_len = len + 5; return buf; } /* see bearssl_ssl.h */ const br_sslrec_out_gcm_class br_sslrec_out_gcm_vtable = { { sizeof(br_sslrec_gcm_context), (void (*)(const br_sslrec_out_class *const *, size_t *, size_t *)) &gcm_max_plaintext, (unsigned char *(*)(const br_sslrec_out_class **, int, unsigned, void *, size_t *)) &gcm_encrypt }, (void (*)(const br_sslrec_out_gcm_class **, const br_block_ctr_class *, const void *, size_t, br_ghash, const void *)) &out_gcm_init }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static int se_choose(const br_ssl_server_policy_class **pctx, const br_ssl_server_context *cc, br_ssl_server_choices *choices) { br_ssl_server_policy_ec_context *pc; const br_suite_translated *st; size_t u, st_num; unsigned hash_id; pc = (br_ssl_server_policy_ec_context *)pctx; st = br_ssl_server_get_client_suites(cc, &st_num); hash_id = br_ssl_choose_hash(br_ssl_server_get_client_hashes(cc) >> 8); if (cc->eng.session.version < BR_TLS12) { hash_id = br_sha1_ID; } choices->chain = pc->chain; choices->chain_len = pc->chain_len; for (u = 0; u < st_num; u ++) { unsigned tt; tt = st[u][1]; switch (tt >> 12) { case BR_SSLKEYX_ECDH_RSA: if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0 && pc->cert_issuer_key_type == BR_KEYTYPE_RSA) { choices->cipher_suite = st[u][0]; return 1; } break; case BR_SSLKEYX_ECDH_ECDSA: if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0 && pc->cert_issuer_key_type == BR_KEYTYPE_EC) { choices->cipher_suite = st[u][0]; return 1; } break; case BR_SSLKEYX_ECDHE_ECDSA: if ((pc->allowed_usages & BR_KEYTYPE_SIGN) != 0 && hash_id != 0) { choices->cipher_suite = st[u][0]; choices->algo_id = hash_id + 0xFF00; return 1; } break; } } return 0; } static uint32_t se_do_keyx(const br_ssl_server_policy_class **pctx, unsigned char *data, size_t *len) { br_ssl_server_policy_ec_context *pc; uint32_t r; size_t xoff, xlen; pc = (br_ssl_server_policy_ec_context *)pctx; r = pc->iec->mul(data, *len, pc->sk->x, pc->sk->xlen, pc->sk->curve); xoff = pc->iec->xoff(pc->sk->curve, &xlen); memmove(data, data + xoff, xlen); *len = xlen; return r; } static size_t se_do_sign(const br_ssl_server_policy_class **pctx, unsigned algo_id, unsigned char *data, size_t hv_len, size_t len) { br_ssl_server_policy_ec_context *pc; unsigned char hv[64]; const br_hash_class *hc; algo_id &= 0xFF; pc = (br_ssl_server_policy_ec_context *)pctx; hc = br_multihash_getimpl(pc->mhash, algo_id); if (hc == NULL) { return 0; } memcpy(hv, data, hv_len); if (len < 139) { return 0; } return pc->iecdsa(pc->iec, hc, hv, pc->sk, data); } static const br_ssl_server_policy_class se_policy_vtable = { sizeof(br_ssl_server_policy_ec_context), se_choose, se_do_keyx, se_do_sign }; /* see bearssl_ssl.h */ void br_ssl_server_set_single_ec(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk, unsigned allowed_usages, unsigned cert_issuer_key_type, const br_ec_impl *iec, br_ecdsa_sign iecdsa) { cc->chain_handler.single_ec.vtable = &se_policy_vtable; cc->chain_handler.single_ec.chain = chain; cc->chain_handler.single_ec.chain_len = chain_len; cc->chain_handler.single_ec.sk = sk; cc->chain_handler.single_ec.allowed_usages = allowed_usages; cc->chain_handler.single_ec.cert_issuer_key_type = cert_issuer_key_type; cc->chain_handler.single_ec.mhash = &cc->eng.mhash; cc->chain_handler.single_ec.iec = iec; cc->chain_handler.single_ec.iecdsa = iecdsa; cc->policy_vtable = &cc->chain_handler.single_ec.vtable; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static int sr_choose(const br_ssl_server_policy_class **pctx, const br_ssl_server_context *cc, br_ssl_server_choices *choices) { br_ssl_server_policy_rsa_context *pc; const br_suite_translated *st; size_t u, st_num; unsigned hash_id; int fh; pc = (br_ssl_server_policy_rsa_context *)pctx; st = br_ssl_server_get_client_suites(cc, &st_num); if (cc->eng.session.version < BR_TLS12) { hash_id = 0; fh = 1; } else { hash_id = br_ssl_choose_hash( br_ssl_server_get_client_hashes(cc)); fh = (hash_id != 0); } choices->chain = pc->chain; choices->chain_len = pc->chain_len; for (u = 0; u < st_num; u ++) { unsigned tt; tt = st[u][1]; switch (tt >> 12) { case BR_SSLKEYX_RSA: if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0) { choices->cipher_suite = st[u][0]; return 1; } break; case BR_SSLKEYX_ECDHE_RSA: if ((pc->allowed_usages & BR_KEYTYPE_SIGN) != 0 && fh) { choices->cipher_suite = st[u][0]; choices->algo_id = hash_id + 0xFF00; return 1; } break; } } return 0; } static uint32_t sr_do_keyx(const br_ssl_server_policy_class **pctx, unsigned char *data, size_t *len) { br_ssl_server_policy_rsa_context *pc; pc = (br_ssl_server_policy_rsa_context *)pctx; return br_rsa_ssl_decrypt(pc->irsacore, pc->sk, data, *len); } /* * OID for hash functions in RSA signatures. */ static const unsigned char _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA1[] = { 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A }; static const unsigned char _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA224[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04 }; static const unsigned char _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA256[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01 }; static const unsigned char _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA384[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02 }; static const unsigned char _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA512[] = { 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03 }; static const unsigned char *_src_ssl_ssl_scert_single_rsa_cHASH_OID[] = { _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA1, _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA224, _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA256, _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA384, _src_ssl_ssl_scert_single_rsa_cHASH_OID_SHA512 }; static size_t sr_do_sign(const br_ssl_server_policy_class **pctx, unsigned algo_id, unsigned char *data, size_t hv_len, size_t len) { br_ssl_server_policy_rsa_context *pc; unsigned char hv[64]; size_t sig_len; const unsigned char *hash_oid; pc = (br_ssl_server_policy_rsa_context *)pctx; memcpy(hv, data, hv_len); algo_id &= 0xFF; if (algo_id == 0) { hash_oid = NULL; } else if (algo_id >= 2 && algo_id <= 6) { hash_oid = _src_ssl_ssl_scert_single_rsa_cHASH_OID[algo_id - 2]; } else { return 0; } sig_len = (pc->sk->n_bitlen + 7) >> 3; if (len < sig_len) { return 0; } return pc->irsasign(hash_oid, hv, hv_len, pc->sk, data) ? sig_len : 0; } static const br_ssl_server_policy_class sr_policy_vtable = { sizeof(br_ssl_server_policy_rsa_context), sr_choose, sr_do_keyx, sr_do_sign }; /* see bearssl_ssl.h */ void br_ssl_server_set_single_rsa(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk, unsigned allowed_usages, br_rsa_private irsacore, br_rsa_pkcs1_sign irsasign) { cc->chain_handler.single_rsa.vtable = &sr_policy_vtable; cc->chain_handler.single_rsa.chain = chain; cc->chain_handler.single_rsa.chain_len = chain_len; cc->chain_handler.single_rsa.sk = sk; cc->chain_handler.single_rsa.allowed_usages = allowed_usages; cc->chain_handler.single_rsa.irsacore = irsacore; cc->chain_handler.single_rsa.irsasign = irsasign; cc->policy_vtable = &cc->chain_handler.single_rsa.vtable; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_zero(br_ssl_server_context *cc) { /* * For really standard C, we should explicitly set to NULL all * pointers, and 0 all other fields. However, on all our target * architectures, a direct memset() will work, be faster, and * use a lot less code. */ memset(cc, 0, sizeof *cc); } /* see bearssl_ssl.h */ int br_ssl_server_reset(br_ssl_server_context *cc) { br_ssl_engine_set_buffer(&cc->eng, NULL, 0, 0); if (!br_ssl_engine_init_rand(&cc->eng)) { return 0; } cc->eng.reneg = 0; br_ssl_engine_hs_reset(&cc->eng, br_ssl_hs_server_init_main, br_ssl_hs_server_run); return br_ssl_engine_last_error(&cc->eng) == BR_ERR_OK; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_full_ec(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, unsigned cert_issuer_key_type, const br_ec_private_key *sk) { /* * The "full" profile supports all implemented cipher suites. * * Rationale for suite order, from most important to least * important rule: * * -- Don't use 3DES if AES is available. * -- Try to have Forward Secrecy (ECDHE suite) if possible. * -- ChaCha20+Poly1305 is better than AES/GCM (faster, smaller). * -- GCM is better than CCM and CBC. CCM is better than CBC. * -- CCM is better than CCM_8. * -- AES-128 is preferred over AES-256 (AES-128 is already * strong enough, and AES-256 is 40% more expensive). * * Note that for ECDH suites, the list will be automatically * filtered based on the issuing CA key type. */ static const uint16_t suites[] = { BR_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA }; /* * All hash functions are activated. * Note: the X.509 validation engine will nonetheless refuse to * validate signatures that use MD5 as hash function. */ static const br_hash_class *hashes[] = { &br_md5_vtable, &br_sha1_vtable, &br_sha224_vtable, &br_sha256_vtable, &br_sha384_vtable, &br_sha512_vtable }; int id; /* * Reset server context and set supported versions from TLS-1.0 * to TLS-1.2 (inclusive). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_default_ec(&cc->eng); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_ec(cc, chain, chain_len, sk, BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN, cert_issuer_key_type, br_ssl_engine_get_ec(&cc->eng), #if BR_LOMUL br_ecdsa_i15_sign_asn1 #else br_ecdsa_i31_sign_asn1 #endif ); /* * Set supported hash functions. */ for (id = br_md5_ID; id <= br_sha512_ID; id ++) { const br_hash_class *hc; hc = hashes[id - 1]; br_ssl_engine_set_hash(&cc->eng, id, hc); } /* * Set the PRF implementations. */ br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf); br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_cbc(&cc->eng); br_ssl_engine_set_default_aes_ccm(&cc->eng); br_ssl_engine_set_default_aes_gcm(&cc->eng); br_ssl_engine_set_default_des_cbc(&cc->eng); br_ssl_engine_set_default_chapol(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_full_rsa(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk) { /* * The "full" profile supports all implemented cipher suites. * * Rationale for suite order, from most important to least * important rule: * * -- Don't use 3DES if AES is available. * -- Try to have Forward Secrecy (ECDHE suite) if possible. * -- ChaCha20+Poly1305 is better than AES/GCM (faster, smaller). * -- GCM is better than CBC. * -- AES-128 is preferred over AES-256 (AES-128 is already * strong enough, and AES-256 is 40% more expensive). */ static const uint16_t suites[] = { BR_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, BR_TLS_RSA_WITH_AES_128_GCM_SHA256, BR_TLS_RSA_WITH_AES_256_GCM_SHA384, BR_TLS_RSA_WITH_AES_128_CCM, BR_TLS_RSA_WITH_AES_256_CCM, BR_TLS_RSA_WITH_AES_128_CCM_8, BR_TLS_RSA_WITH_AES_256_CCM_8, BR_TLS_RSA_WITH_AES_128_CBC_SHA256, BR_TLS_RSA_WITH_AES_256_CBC_SHA256, BR_TLS_RSA_WITH_AES_128_CBC_SHA, BR_TLS_RSA_WITH_AES_256_CBC_SHA, BR_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, BR_TLS_RSA_WITH_3DES_EDE_CBC_SHA }; /* * All hash functions are activated. * Note: the X.509 validation engine will nonetheless refuse to * validate signatures that use MD5 as hash function. */ static const br_hash_class *hashes[] = { &br_md5_vtable, &br_sha1_vtable, &br_sha224_vtable, &br_sha256_vtable, &br_sha384_vtable, &br_sha512_vtable }; int id; /* * Reset server context and set supported versions from TLS-1.0 * to TLS-1.2 (inclusive). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_default_ec(&cc->eng); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_rsa(cc, chain, chain_len, sk, BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN, br_rsa_private_get_default(), br_rsa_pkcs1_sign_get_default()); /* * Set supported hash functions. */ for (id = br_md5_ID; id <= br_sha512_ID; id ++) { const br_hash_class *hc; hc = hashes[id - 1]; br_ssl_engine_set_hash(&cc->eng, id, hc); } /* * Set the PRF implementations. */ br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf); br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_cbc(&cc->eng); br_ssl_engine_set_default_aes_ccm(&cc->eng); br_ssl_engine_set_default_aes_gcm(&cc->eng); br_ssl_engine_set_default_des_cbc(&cc->eng); br_ssl_engine_set_default_chapol(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_mine2c(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_ec(&cc->eng, &br_ec_all_m15); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_rsa(cc, chain, chain_len, sk, BR_KEYTYPE_SIGN, 0, br_rsa_i31_pkcs1_sign); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_chapol(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_mine2g(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_ec(&cc->eng, &br_ec_all_m15); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_rsa(cc, chain, chain_len, sk, BR_KEYTYPE_SIGN, 0, br_rsa_i31_pkcs1_sign); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_gcm(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_minf2c(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_ec(&cc->eng, &br_ec_all_m15); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_ec(cc, chain, chain_len, sk, BR_KEYTYPE_SIGN, 0, &br_ec_all_m15, br_ecdsa_i31_sign_asn1); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_chapol(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_minf2g(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites and elliptic curve implementation (for ECDHE). */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); br_ssl_engine_set_ec(&cc->eng, &br_ec_all_m15); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_ec(cc, chain, chain_len, sk, BR_KEYTYPE_SIGN, 0, &br_ec_all_m15, br_ecdsa_i31_sign_asn1); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_gcm(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_minr2g(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_rsa_private_key *sk) { static const uint16_t suites[] = { BR_TLS_RSA_WITH_AES_128_GCM_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites. */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_rsa(cc, chain, chain_len, sk, BR_KEYTYPE_KEYX, br_rsa_i31_private, 0); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_gcm(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_minu2g(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites. */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_ec(cc, chain, chain_len, sk, BR_KEYTYPE_KEYX, BR_KEYTYPE_RSA, &br_ec_all_m15, 0); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_gcm(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_ssl.h */ void br_ssl_server_init_minv2g(br_ssl_server_context *cc, const br_x509_certificate *chain, size_t chain_len, const br_ec_private_key *sk) { static const uint16_t suites[] = { BR_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 }; /* * Reset server context and set supported versions to TLS-1.2 (only). */ br_ssl_server_zero(cc); br_ssl_engine_set_versions(&cc->eng, BR_TLS12, BR_TLS12); /* * Set suites. */ br_ssl_engine_set_suites(&cc->eng, suites, (sizeof suites) / (sizeof suites[0])); /* * Set the "server policy": handler for the certificate chain * and private key operations. */ br_ssl_server_set_single_ec(cc, chain, chain_len, sk, BR_KEYTYPE_KEYX, BR_KEYTYPE_EC, &br_ec_all_m15, 0); /* * Set supported hash functions. */ br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable); /* * Set the PRF implementations. */ br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf); /* * Symmetric encryption. */ br_ssl_engine_set_default_aes_gcm(&cc->eng); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_big_cbcdec_init(br_aes_big_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_big_cbcdec_vtable; ctx->num_rounds = br_aes_big_keysched_inv(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_big_cbcdec_run(const br_aes_big_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16]; int i; memcpy(tmp, buf, 16); br_aes_big_decrypt(ctx->num_rounds, ctx->skey, buf); for (i = 0; i < 16; i ++) { buf[i] ^= ivbuf[i]; } memcpy(ivbuf, tmp, 16); buf += 16; len -= 16; } } /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_big_cbcdec_vtable = { sizeof(br_aes_big_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_big_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_big_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_big_cbcenc_init(br_aes_big_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_big_cbcenc_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_big_cbcenc_run(const br_aes_big_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { int i; for (i = 0; i < 16; i ++) { buf[i] ^= ivbuf[i]; } br_aes_big_encrypt(ctx->num_rounds, ctx->skey, buf); memcpy(ivbuf, buf, 16); buf += 16; len -= 16; } } /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_big_cbcenc_vtable = { sizeof(br_aes_big_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_big_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_big_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_big_ctr_init(br_aes_big_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_big_ctr_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_big_ctr_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ uint32_t br_aes_big_ctr_run(const br_aes_big_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16]; memcpy(tmp, iv, 12); br_enc32be(tmp + 12, cc ++); br_aes_big_encrypt(ctx->num_rounds, ctx->skey, tmp); if (len <= 16) { _src_symcipher_aes_big_ctr_cxorbuf(buf, tmp, len); break; } _src_symcipher_aes_big_ctr_cxorbuf(buf, tmp, 16); buf += 16; len -= 16; } return cc; } /* see bearssl_block.h */ const br_block_ctr_class br_aes_big_ctr_vtable = { sizeof(br_aes_big_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_big_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_big_ctr_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_big_ctrcbc_init(br_aes_big_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_big_ctrcbc_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_big_ctrcbc_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ void br_aes_big_ctrcbc_ctr(const br_aes_big_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char *buf, *bctr; uint32_t cc0, cc1, cc2, cc3; buf = (unsigned char*)data; bctr = (unsigned char*)ctr; cc3 = br_dec32be(bctr + 0); cc2 = br_dec32be(bctr + 4); cc1 = br_dec32be(bctr + 8); cc0 = br_dec32be(bctr + 12); while (len > 0) { unsigned char tmp[16]; uint32_t carry; br_enc32be(tmp + 0, cc3); br_enc32be(tmp + 4, cc2); br_enc32be(tmp + 8, cc1); br_enc32be(tmp + 12, cc0); br_aes_big_encrypt(ctx->num_rounds, ctx->skey, tmp); _src_symcipher_aes_big_ctrcbc_cxorbuf(buf, tmp, 16); buf += 16; len -= 16; cc0 ++; carry = (~(cc0 | -cc0)) >> 31; cc1 += carry; carry &= (~(cc1 | -cc1)) >> 31; cc2 += carry; carry &= (~(cc2 | -cc2)) >> 31; cc3 += carry; } br_enc32be(bctr + 0, cc3); br_enc32be(bctr + 4, cc2); br_enc32be(bctr + 8, cc1); br_enc32be(bctr + 12, cc0); } /* see bearssl_block.h */ void br_aes_big_ctrcbc_mac(const br_aes_big_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { const unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { _src_symcipher_aes_big_ctrcbc_cxorbuf(cbcmac, buf, 16); br_aes_big_encrypt(ctx->num_rounds, ctx->skey, cbcmac); buf += 16; len -= 16; } } /* see bearssl_block.h */ void br_aes_big_ctrcbc_encrypt(const br_aes_big_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { br_aes_big_ctrcbc_ctr(ctx, ctr, data, len); br_aes_big_ctrcbc_mac(ctx, cbcmac, data, len); } /* see bearssl_block.h */ void br_aes_big_ctrcbc_decrypt(const br_aes_big_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { br_aes_big_ctrcbc_mac(ctx, cbcmac, data, len); br_aes_big_ctrcbc_ctr(ctx, ctr, data, len); } /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_big_ctrcbc_vtable = { sizeof(br_aes_big_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_big_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_big_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_big_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_big_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_big_ctrcbc_mac }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Inverse S-box (used in key schedule for decryption). */ static const unsigned char _src_symcipher_aes_big_dec_ciS[] = { 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D }; static const uint32_t iSsm0[] = { 0x51F4A750, 0x7E416553, 0x1A17A4C3, 0x3A275E96, 0x3BAB6BCB, 0x1F9D45F1, 0xACFA58AB, 0x4BE30393, 0x2030FA55, 0xAD766DF6, 0x88CC7691, 0xF5024C25, 0x4FE5D7FC, 0xC52ACBD7, 0x26354480, 0xB562A38F, 0xDEB15A49, 0x25BA1B67, 0x45EA0E98, 0x5DFEC0E1, 0xC32F7502, 0x814CF012, 0x8D4697A3, 0x6BD3F9C6, 0x038F5FE7, 0x15929C95, 0xBF6D7AEB, 0x955259DA, 0xD4BE832D, 0x587421D3, 0x49E06929, 0x8EC9C844, 0x75C2896A, 0xF48E7978, 0x99583E6B, 0x27B971DD, 0xBEE14FB6, 0xF088AD17, 0xC920AC66, 0x7DCE3AB4, 0x63DF4A18, 0xE51A3182, 0x97513360, 0x62537F45, 0xB16477E0, 0xBB6BAE84, 0xFE81A01C, 0xF9082B94, 0x70486858, 0x8F45FD19, 0x94DE6C87, 0x527BF8B7, 0xAB73D323, 0x724B02E2, 0xE31F8F57, 0x6655AB2A, 0xB2EB2807, 0x2FB5C203, 0x86C57B9A, 0xD33708A5, 0x302887F2, 0x23BFA5B2, 0x02036ABA, 0xED16825C, 0x8ACF1C2B, 0xA779B492, 0xF307F2F0, 0x4E69E2A1, 0x65DAF4CD, 0x0605BED5, 0xD134621F, 0xC4A6FE8A, 0x342E539D, 0xA2F355A0, 0x058AE132, 0xA4F6EB75, 0x0B83EC39, 0x4060EFAA, 0x5E719F06, 0xBD6E1051, 0x3E218AF9, 0x96DD063D, 0xDD3E05AE, 0x4DE6BD46, 0x91548DB5, 0x71C45D05, 0x0406D46F, 0x605015FF, 0x1998FB24, 0xD6BDE997, 0x894043CC, 0x67D99E77, 0xB0E842BD, 0x07898B88, 0xE7195B38, 0x79C8EEDB, 0xA17C0A47, 0x7C420FE9, 0xF8841EC9, 0x00000000, 0x09808683, 0x322BED48, 0x1E1170AC, 0x6C5A724E, 0xFD0EFFFB, 0x0F853856, 0x3DAED51E, 0x362D3927, 0x0A0FD964, 0x685CA621, 0x9B5B54D1, 0x24362E3A, 0x0C0A67B1, 0x9357E70F, 0xB4EE96D2, 0x1B9B919E, 0x80C0C54F, 0x61DC20A2, 0x5A774B69, 0x1C121A16, 0xE293BA0A, 0xC0A02AE5, 0x3C22E043, 0x121B171D, 0x0E090D0B, 0xF28BC7AD, 0x2DB6A8B9, 0x141EA9C8, 0x57F11985, 0xAF75074C, 0xEE99DDBB, 0xA37F60FD, 0xF701269F, 0x5C72F5BC, 0x44663BC5, 0x5BFB7E34, 0x8B432976, 0xCB23C6DC, 0xB6EDFC68, 0xB8E4F163, 0xD731DCCA, 0x42638510, 0x13972240, 0x84C61120, 0x854A247D, 0xD2BB3DF8, 0xAEF93211, 0xC729A16D, 0x1D9E2F4B, 0xDCB230F3, 0x0D8652EC, 0x77C1E3D0, 0x2BB3166C, 0xA970B999, 0x119448FA, 0x47E96422, 0xA8FC8CC4, 0xA0F03F1A, 0x567D2CD8, 0x223390EF, 0x87494EC7, 0xD938D1C1, 0x8CCAA2FE, 0x98D40B36, 0xA6F581CF, 0xA57ADE28, 0xDAB78E26, 0x3FADBFA4, 0x2C3A9DE4, 0x5078920D, 0x6A5FCC9B, 0x547E4662, 0xF68D13C2, 0x90D8B8E8, 0x2E39F75E, 0x82C3AFF5, 0x9F5D80BE, 0x69D0937C, 0x6FD52DA9, 0xCF2512B3, 0xC8AC993B, 0x10187DA7, 0xE89C636E, 0xDB3BBB7B, 0xCD267809, 0x6E5918F4, 0xEC9AB701, 0x834F9AA8, 0xE6956E65, 0xAAFFE67E, 0x21BCCF08, 0xEF15E8E6, 0xBAE79BD9, 0x4A6F36CE, 0xEA9F09D4, 0x29B07CD6, 0x31A4B2AF, 0x2A3F2331, 0xC6A59430, 0x35A266C0, 0x744EBC37, 0xFC82CAA6, 0xE090D0B0, 0x33A7D815, 0xF104984A, 0x41ECDAF7, 0x7FCD500E, 0x1791F62F, 0x764DD68D, 0x43EFB04D, 0xCCAA4D54, 0xE49604DF, 0x9ED1B5E3, 0x4C6A881B, 0xC12C1FB8, 0x4665517F, 0x9D5EEA04, 0x018C355D, 0xFA877473, 0xFB0B412E, 0xB3671D5A, 0x92DBD252, 0xE9105633, 0x6DD64713, 0x9AD7618C, 0x37A10C7A, 0x59F8148E, 0xEB133C89, 0xCEA927EE, 0xB761C935, 0xE11CE5ED, 0x7A47B13C, 0x9CD2DF59, 0x55F2733F, 0x1814CE79, 0x73C737BF, 0x53F7CDEA, 0x5FFDAA5B, 0xDF3D6F14, 0x7844DB86, 0xCAAFF381, 0xB968C43E, 0x3824342C, 0xC2A3405F, 0x161DC372, 0xBCE2250C, 0x283C498B, 0xFF0D9541, 0x39A80171, 0x080CB3DE, 0xD8B4E49C, 0x6456C190, 0x7BCB8461, 0xD532B670, 0x486C5C74, 0xD0B85742 }; static unsigned mul2(unsigned x) { x <<= 1; return x ^ ((unsigned)(-(int)(x >> 8)) & 0x11B); } static unsigned _src_symcipher_aes_big_dec_cmul9(unsigned x) { return x ^ mul2(mul2(mul2(x))); } static unsigned mulb(unsigned x) { unsigned x2; x2 = mul2(x); return x ^ x2 ^ mul2(mul2(x2)); } static unsigned muld(unsigned x) { unsigned x4; x4 = mul2(mul2(x)); return x ^ x4 ^ mul2(x4); } static unsigned mule(unsigned x) { unsigned x2, x4; x2 = mul2(x); x4 = mul2(x2); return x2 ^ x4 ^ mul2(x4); } /* see inner.h */ unsigned br_aes_big_keysched_inv(uint32_t *skey, const void *key, size_t key_len) { unsigned num_rounds; int i, m; /* * Sub-keys for decryption are distinct from encryption sub-keys * in that InvMixColumns() is already applied for the inner * rounds. */ num_rounds = br_aes_keysched(skey, key, key_len); m = (int)(num_rounds << 2); for (i = 4; i < m; i ++) { uint32_t p; unsigned p0, p1, p2, p3; uint32_t q0, q1, q2, q3; p = skey[i]; p0 = p >> 24; p1 = (p >> 16) & 0xFF; p2 = (p >> 8) & 0xFF; p3 = p & 0xFF; q0 = mule(p0) ^ mulb(p1) ^ muld(p2) ^ _src_symcipher_aes_big_dec_cmul9(p3); q1 = _src_symcipher_aes_big_dec_cmul9(p0) ^ mule(p1) ^ mulb(p2) ^ muld(p3); q2 = muld(p0) ^ _src_symcipher_aes_big_dec_cmul9(p1) ^ mule(p2) ^ mulb(p3); q3 = mulb(p0) ^ muld(p1) ^ _src_symcipher_aes_big_dec_cmul9(p2) ^ mule(p3); skey[i] = (q0 << 24) | (q1 << 16) | (q2 << 8) | q3; } return num_rounds; } static inline uint32_t _src_symcipher_aes_big_dec_crotr(uint32_t x, int n) { return (x << (32 - n)) | (x >> n); } #define iSboxExt0(x) (iSsm0[x]) #define iSboxExt1(x) (_src_symcipher_aes_big_dec_crotr(iSsm0[x], 8)) #define iSboxExt2(x) (_src_symcipher_aes_big_dec_crotr(iSsm0[x], 16)) #define iSboxExt3(x) (_src_symcipher_aes_big_dec_crotr(iSsm0[x], 24)) /* see bearssl.h */ void br_aes_big_decrypt(unsigned num_rounds, const uint32_t *skey, void *data) { unsigned char *buf; uint32_t s0, s1, s2, s3; uint32_t t0, t1, t2, t3; unsigned u; buf = (unsigned char*)data; s0 = br_dec32be(buf); s1 = br_dec32be(buf + 4); s2 = br_dec32be(buf + 8); s3 = br_dec32be(buf + 12); s0 ^= skey[(num_rounds << 2) + 0]; s1 ^= skey[(num_rounds << 2) + 1]; s2 ^= skey[(num_rounds << 2) + 2]; s3 ^= skey[(num_rounds << 2) + 3]; for (u = num_rounds - 1; u > 0; u --) { uint32_t v0 = iSboxExt0(s0 >> 24) ^ iSboxExt1((s3 >> 16) & 0xFF) ^ iSboxExt2((s2 >> 8) & 0xFF) ^ iSboxExt3(s1 & 0xFF); uint32_t v1 = iSboxExt0(s1 >> 24) ^ iSboxExt1((s0 >> 16) & 0xFF) ^ iSboxExt2((s3 >> 8) & 0xFF) ^ iSboxExt3(s2 & 0xFF); uint32_t v2 = iSboxExt0(s2 >> 24) ^ iSboxExt1((s1 >> 16) & 0xFF) ^ iSboxExt2((s0 >> 8) & 0xFF) ^ iSboxExt3(s3 & 0xFF); uint32_t v3 = iSboxExt0(s3 >> 24) ^ iSboxExt1((s2 >> 16) & 0xFF) ^ iSboxExt2((s1 >> 8) & 0xFF) ^ iSboxExt3(s0 & 0xFF); s0 = v0; s1 = v1; s2 = v2; s3 = v3; s0 ^= skey[u << 2]; s1 ^= skey[(u << 2) + 1]; s2 ^= skey[(u << 2) + 2]; s3 ^= skey[(u << 2) + 3]; } t0 = ((uint32_t)_src_symcipher_aes_big_dec_ciS[s0 >> 24] << 24) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s3 >> 16) & 0xFF] << 16) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s2 >> 8) & 0xFF] << 8) | (uint32_t)_src_symcipher_aes_big_dec_ciS[s1 & 0xFF]; t1 = ((uint32_t)_src_symcipher_aes_big_dec_ciS[s1 >> 24] << 24) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s0 >> 16) & 0xFF] << 16) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s3 >> 8) & 0xFF] << 8) | (uint32_t)_src_symcipher_aes_big_dec_ciS[s2 & 0xFF]; t2 = ((uint32_t)_src_symcipher_aes_big_dec_ciS[s2 >> 24] << 24) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s1 >> 16) & 0xFF] << 16) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s0 >> 8) & 0xFF] << 8) | (uint32_t)_src_symcipher_aes_big_dec_ciS[s3 & 0xFF]; t3 = ((uint32_t)_src_symcipher_aes_big_dec_ciS[s3 >> 24] << 24) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s2 >> 16) & 0xFF] << 16) | ((uint32_t)_src_symcipher_aes_big_dec_ciS[(s1 >> 8) & 0xFF] << 8) | (uint32_t)_src_symcipher_aes_big_dec_ciS[s0 & 0xFF]; s0 = t0 ^ skey[0]; s1 = t1 ^ skey[1]; s2 = t2 ^ skey[2]; s3 = t3 ^ skey[3]; br_enc32be(buf, s0); br_enc32be(buf + 4, s1); br_enc32be(buf + 8, s2); br_enc32be(buf + 12, s3); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define S br_aes_S static const uint32_t Ssm0[] = { 0xC66363A5, 0xF87C7C84, 0xEE777799, 0xF67B7B8D, 0xFFF2F20D, 0xD66B6BBD, 0xDE6F6FB1, 0x91C5C554, 0x60303050, 0x02010103, 0xCE6767A9, 0x562B2B7D, 0xE7FEFE19, 0xB5D7D762, 0x4DABABE6, 0xEC76769A, 0x8FCACA45, 0x1F82829D, 0x89C9C940, 0xFA7D7D87, 0xEFFAFA15, 0xB25959EB, 0x8E4747C9, 0xFBF0F00B, 0x41ADADEC, 0xB3D4D467, 0x5FA2A2FD, 0x45AFAFEA, 0x239C9CBF, 0x53A4A4F7, 0xE4727296, 0x9BC0C05B, 0x75B7B7C2, 0xE1FDFD1C, 0x3D9393AE, 0x4C26266A, 0x6C36365A, 0x7E3F3F41, 0xF5F7F702, 0x83CCCC4F, 0x6834345C, 0x51A5A5F4, 0xD1E5E534, 0xF9F1F108, 0xE2717193, 0xABD8D873, 0x62313153, 0x2A15153F, 0x0804040C, 0x95C7C752, 0x46232365, 0x9DC3C35E, 0x30181828, 0x379696A1, 0x0A05050F, 0x2F9A9AB5, 0x0E070709, 0x24121236, 0x1B80809B, 0xDFE2E23D, 0xCDEBEB26, 0x4E272769, 0x7FB2B2CD, 0xEA75759F, 0x1209091B, 0x1D83839E, 0x582C2C74, 0x341A1A2E, 0x361B1B2D, 0xDC6E6EB2, 0xB45A5AEE, 0x5BA0A0FB, 0xA45252F6, 0x763B3B4D, 0xB7D6D661, 0x7DB3B3CE, 0x5229297B, 0xDDE3E33E, 0x5E2F2F71, 0x13848497, 0xA65353F5, 0xB9D1D168, 0x00000000, 0xC1EDED2C, 0x40202060, 0xE3FCFC1F, 0x79B1B1C8, 0xB65B5BED, 0xD46A6ABE, 0x8DCBCB46, 0x67BEBED9, 0x7239394B, 0x944A4ADE, 0x984C4CD4, 0xB05858E8, 0x85CFCF4A, 0xBBD0D06B, 0xC5EFEF2A, 0x4FAAAAE5, 0xEDFBFB16, 0x864343C5, 0x9A4D4DD7, 0x66333355, 0x11858594, 0x8A4545CF, 0xE9F9F910, 0x04020206, 0xFE7F7F81, 0xA05050F0, 0x783C3C44, 0x259F9FBA, 0x4BA8A8E3, 0xA25151F3, 0x5DA3A3FE, 0x804040C0, 0x058F8F8A, 0x3F9292AD, 0x219D9DBC, 0x70383848, 0xF1F5F504, 0x63BCBCDF, 0x77B6B6C1, 0xAFDADA75, 0x42212163, 0x20101030, 0xE5FFFF1A, 0xFDF3F30E, 0xBFD2D26D, 0x81CDCD4C, 0x180C0C14, 0x26131335, 0xC3ECEC2F, 0xBE5F5FE1, 0x359797A2, 0x884444CC, 0x2E171739, 0x93C4C457, 0x55A7A7F2, 0xFC7E7E82, 0x7A3D3D47, 0xC86464AC, 0xBA5D5DE7, 0x3219192B, 0xE6737395, 0xC06060A0, 0x19818198, 0x9E4F4FD1, 0xA3DCDC7F, 0x44222266, 0x542A2A7E, 0x3B9090AB, 0x0B888883, 0x8C4646CA, 0xC7EEEE29, 0x6BB8B8D3, 0x2814143C, 0xA7DEDE79, 0xBC5E5EE2, 0x160B0B1D, 0xADDBDB76, 0xDBE0E03B, 0x64323256, 0x743A3A4E, 0x140A0A1E, 0x924949DB, 0x0C06060A, 0x4824246C, 0xB85C5CE4, 0x9FC2C25D, 0xBDD3D36E, 0x43ACACEF, 0xC46262A6, 0x399191A8, 0x319595A4, 0xD3E4E437, 0xF279798B, 0xD5E7E732, 0x8BC8C843, 0x6E373759, 0xDA6D6DB7, 0x018D8D8C, 0xB1D5D564, 0x9C4E4ED2, 0x49A9A9E0, 0xD86C6CB4, 0xAC5656FA, 0xF3F4F407, 0xCFEAEA25, 0xCA6565AF, 0xF47A7A8E, 0x47AEAEE9, 0x10080818, 0x6FBABAD5, 0xF0787888, 0x4A25256F, 0x5C2E2E72, 0x381C1C24, 0x57A6A6F1, 0x73B4B4C7, 0x97C6C651, 0xCBE8E823, 0xA1DDDD7C, 0xE874749C, 0x3E1F1F21, 0x964B4BDD, 0x61BDBDDC, 0x0D8B8B86, 0x0F8A8A85, 0xE0707090, 0x7C3E3E42, 0x71B5B5C4, 0xCC6666AA, 0x904848D8, 0x06030305, 0xF7F6F601, 0x1C0E0E12, 0xC26161A3, 0x6A35355F, 0xAE5757F9, 0x69B9B9D0, 0x17868691, 0x99C1C158, 0x3A1D1D27, 0x279E9EB9, 0xD9E1E138, 0xEBF8F813, 0x2B9898B3, 0x22111133, 0xD26969BB, 0xA9D9D970, 0x078E8E89, 0x339494A7, 0x2D9B9BB6, 0x3C1E1E22, 0x15878792, 0xC9E9E920, 0x87CECE49, 0xAA5555FF, 0x50282878, 0xA5DFDF7A, 0x038C8C8F, 0x59A1A1F8, 0x09898980, 0x1A0D0D17, 0x65BFBFDA, 0xD7E6E631, 0x844242C6, 0xD06868B8, 0x824141C3, 0x299999B0, 0x5A2D2D77, 0x1E0F0F11, 0x7BB0B0CB, 0xA85454FC, 0x6DBBBBD6, 0x2C16163A }; static inline uint32_t _src_symcipher_aes_big_enc_crotr(uint32_t x, int n) { return (x << (32 - n)) | (x >> n); } #define SboxExt0(x) (Ssm0[x]) #define SboxExt1(x) (_src_symcipher_aes_big_enc_crotr(Ssm0[x], 8)) #define SboxExt2(x) (_src_symcipher_aes_big_enc_crotr(Ssm0[x], 16)) #define SboxExt3(x) (_src_symcipher_aes_big_enc_crotr(Ssm0[x], 24)) /* see bearssl.h */ void br_aes_big_encrypt(unsigned num_rounds, const uint32_t *skey, void *data) { unsigned char *buf; uint32_t s0, s1, s2, s3; uint32_t t0, t1, t2, t3; unsigned u; buf = (unsigned char*)data; s0 = br_dec32be(buf); s1 = br_dec32be(buf + 4); s2 = br_dec32be(buf + 8); s3 = br_dec32be(buf + 12); s0 ^= skey[0]; s1 ^= skey[1]; s2 ^= skey[2]; s3 ^= skey[3]; for (u = 1; u < num_rounds; u ++) { uint32_t v0, v1, v2, v3; v0 = SboxExt0(s0 >> 24) ^ SboxExt1((s1 >> 16) & 0xFF) ^ SboxExt2((s2 >> 8) & 0xFF) ^ SboxExt3(s3 & 0xFF); v1 = SboxExt0(s1 >> 24) ^ SboxExt1((s2 >> 16) & 0xFF) ^ SboxExt2((s3 >> 8) & 0xFF) ^ SboxExt3(s0 & 0xFF); v2 = SboxExt0(s2 >> 24) ^ SboxExt1((s3 >> 16) & 0xFF) ^ SboxExt2((s0 >> 8) & 0xFF) ^ SboxExt3(s1 & 0xFF); v3 = SboxExt0(s3 >> 24) ^ SboxExt1((s0 >> 16) & 0xFF) ^ SboxExt2((s1 >> 8) & 0xFF) ^ SboxExt3(s2 & 0xFF); s0 = v0; s1 = v1; s2 = v2; s3 = v3; s0 ^= skey[u << 2]; s1 ^= skey[(u << 2) + 1]; s2 ^= skey[(u << 2) + 2]; s3 ^= skey[(u << 2) + 3]; } t0 = ((uint32_t)S[s0 >> 24] << 24) | ((uint32_t)S[(s1 >> 16) & 0xFF] << 16) | ((uint32_t)S[(s2 >> 8) & 0xFF] << 8) | (uint32_t)S[s3 & 0xFF]; t1 = ((uint32_t)S[s1 >> 24] << 24) | ((uint32_t)S[(s2 >> 16) & 0xFF] << 16) | ((uint32_t)S[(s3 >> 8) & 0xFF] << 8) | (uint32_t)S[s0 & 0xFF]; t2 = ((uint32_t)S[s2 >> 24] << 24) | ((uint32_t)S[(s3 >> 16) & 0xFF] << 16) | ((uint32_t)S[(s0 >> 8) & 0xFF] << 8) | (uint32_t)S[s1 & 0xFF]; t3 = ((uint32_t)S[s3 >> 24] << 24) | ((uint32_t)S[(s0 >> 16) & 0xFF] << 16) | ((uint32_t)S[(s1 >> 8) & 0xFF] << 8) | (uint32_t)S[s2 & 0xFF]; s0 = t0 ^ skey[num_rounds << 2]; s1 = t1 ^ skey[(num_rounds << 2) + 1]; s2 = t2 ^ skey[(num_rounds << 2) + 2]; s3 = t3 ^ skey[(num_rounds << 2) + 3]; br_enc32be(buf, s0); br_enc32be(buf + 4, s1); br_enc32be(buf + 8, s2); br_enc32be(buf + 12, s3); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static const uint32_t _src_symcipher_aes_common_cRcon[] = { 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000 }; #define S br_aes_S /* see inner.h */ const unsigned char br_aes_S[] = { 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, 0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF, 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73, 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, 0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A, 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, 0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF, 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16 }; static uint32_t SubWord(uint32_t x) { return ((uint32_t)S[x >> 24] << 24) | ((uint32_t)S[(x >> 16) & 0xFF] << 16) | ((uint32_t)S[(x >> 8) & 0xFF] << 8) | (uint32_t)S[x & 0xFF]; } /* see inner.h */ unsigned br_aes_keysched(uint32_t *skey, const void *key, size_t key_len) { unsigned num_rounds; int i, j, k, nk, nkf; switch (key_len) { case 16: num_rounds = 10; break; case 24: num_rounds = 12; break; case 32: num_rounds = 14; break; default: /* abort(); */ return 0; } nk = (int)(key_len >> 2); nkf = (int)((num_rounds + 1) << 2); for (i = 0; i < nk; i ++) { skey[i] = br_dec32be((const unsigned char *)key + (i << 2)); } for (i = nk, j = 0, k = 0; i < nkf; i ++) { uint32_t tmp; tmp = skey[i - 1]; if (j == 0) { tmp = (tmp << 8) | (tmp >> 24); tmp = SubWord(tmp) ^ _src_symcipher_aes_common_cRcon[k]; } else if (nk > 6 && j == 4) { tmp = SubWord(tmp); } skey[i] = skey[i - nk] ^ tmp; if (++ j == nk) { j = 0; k ++; } } return num_rounds; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_aes_ct_bitslice_Sbox(uint32_t *q) { /* * This S-box implementation is a straightforward translation of * the circuit described by Boyar and Peralta in "A new * combinational logic minimization technique with applications * to cryptology" (https://eprint.iacr.org/2009/191.pdf). * * Note that variables x* (input) and s* (output) are numbered * in "reverse" order (x0 is the high bit, x7 is the low bit). */ uint32_t x0, x1, x2, x3, x4, x5, x6, x7; uint32_t y1, y2, y3, y4, y5, y6, y7, y8, y9; uint32_t y10, y11, y12, y13, y14, y15, y16, y17, y18, y19; uint32_t y20, y21; uint32_t z0, z1, z2, z3, z4, z5, z6, z7, z8, z9; uint32_t z10, z11, z12, z13, z14, z15, z16, z17; uint32_t t0, t1, t2, t3, t4, t5, t6, t7, t8, t9; uint32_t t10, t11, t12, t13, t14, t15, t16, t17, t18, t19; uint32_t t20, t21, t22, t23, t24, t25, t26, t27, t28, t29; uint32_t t30, t31, t32, t33, t34, t35, t36, t37, t38, t39; uint32_t t40, t41, t42, t43, t44, t45, t46, t47, t48, t49; uint32_t t50, t51, t52, t53, t54, t55, t56, t57, t58, t59; uint32_t t60, t61, t62, t63, t64, t65, t66, t67; uint32_t s0, s1, s2, s3, s4, s5, s6, s7; x0 = q[7]; x1 = q[6]; x2 = q[5]; x3 = q[4]; x4 = q[3]; x5 = q[2]; x6 = q[1]; x7 = q[0]; /* * Top linear transformation. */ y14 = x3 ^ x5; y13 = x0 ^ x6; y9 = x0 ^ x3; y8 = x0 ^ x5; t0 = x1 ^ x2; y1 = t0 ^ x7; y4 = y1 ^ x3; y12 = y13 ^ y14; y2 = y1 ^ x0; y5 = y1 ^ x6; y3 = y5 ^ y8; t1 = x4 ^ y12; y15 = t1 ^ x5; y20 = t1 ^ x1; y6 = y15 ^ x7; y10 = y15 ^ t0; y11 = y20 ^ y9; y7 = x7 ^ y11; y17 = y10 ^ y11; y19 = y10 ^ y8; y16 = t0 ^ y11; y21 = y13 ^ y16; y18 = x0 ^ y16; /* * Non-linear section. */ t2 = y12 & y15; t3 = y3 & y6; t4 = t3 ^ t2; t5 = y4 & x7; t6 = t5 ^ t2; t7 = y13 & y16; t8 = y5 & y1; t9 = t8 ^ t7; t10 = y2 & y7; t11 = t10 ^ t7; t12 = y9 & y11; t13 = y14 & y17; t14 = t13 ^ t12; t15 = y8 & y10; t16 = t15 ^ t12; t17 = t4 ^ t14; t18 = t6 ^ t16; t19 = t9 ^ t14; t20 = t11 ^ t16; t21 = t17 ^ y20; t22 = t18 ^ y19; t23 = t19 ^ y21; t24 = t20 ^ y18; t25 = t21 ^ t22; t26 = t21 & t23; t27 = t24 ^ t26; t28 = t25 & t27; t29 = t28 ^ t22; t30 = t23 ^ t24; t31 = t22 ^ t26; t32 = t31 & t30; t33 = t32 ^ t24; t34 = t23 ^ t33; t35 = t27 ^ t33; t36 = t24 & t35; t37 = t36 ^ t34; t38 = t27 ^ t36; t39 = t29 & t38; t40 = t25 ^ t39; t41 = t40 ^ t37; t42 = t29 ^ t33; t43 = t29 ^ t40; t44 = t33 ^ t37; t45 = t42 ^ t41; z0 = t44 & y15; z1 = t37 & y6; z2 = t33 & x7; z3 = t43 & y16; z4 = t40 & y1; z5 = t29 & y7; z6 = t42 & y11; z7 = t45 & y17; z8 = t41 & y10; z9 = t44 & y12; z10 = t37 & y3; z11 = t33 & y4; z12 = t43 & y13; z13 = t40 & y5; z14 = t29 & y2; z15 = t42 & y9; z16 = t45 & y14; z17 = t41 & y8; /* * Bottom linear transformation. */ t46 = z15 ^ z16; t47 = z10 ^ z11; t48 = z5 ^ z13; t49 = z9 ^ z10; t50 = z2 ^ z12; t51 = z2 ^ z5; t52 = z7 ^ z8; t53 = z0 ^ z3; t54 = z6 ^ z7; t55 = z16 ^ z17; t56 = z12 ^ t48; t57 = t50 ^ t53; t58 = z4 ^ t46; t59 = z3 ^ t54; t60 = t46 ^ t57; t61 = z14 ^ t57; t62 = t52 ^ t58; t63 = t49 ^ t58; t64 = z4 ^ t59; t65 = t61 ^ t62; t66 = z1 ^ t63; s0 = t59 ^ t63; s6 = t56 ^ ~t62; s7 = t48 ^ ~t60; t67 = t64 ^ t65; s3 = t53 ^ t66; s4 = t51 ^ t66; s5 = t47 ^ t65; s1 = t64 ^ ~s3; s2 = t55 ^ ~t67; q[7] = s0; q[6] = s1; q[5] = s2; q[4] = s3; q[3] = s4; q[2] = s5; q[1] = s6; q[0] = s7; } /* see inner.h */ void br_aes_ct_ortho(uint32_t *q) { #define _src_symcipher_aes_ct_cSWAPN(cl, ch, s, x, y) do { \ uint32_t a, b; \ a = (x); \ b = (y); \ (x) = (a & (uint32_t)cl) | ((b & (uint32_t)cl) << (s)); \ (y) = ((a & (uint32_t)ch) >> (s)) | (b & (uint32_t)ch); \ } while (0) #define _src_symcipher_aes_ct_cSWAP2(x, y) _src_symcipher_aes_ct_cSWAPN(0x55555555, 0xAAAAAAAA, 1, x, y) #define _src_symcipher_aes_ct_cSWAP4(x, y) _src_symcipher_aes_ct_cSWAPN(0x33333333, 0xCCCCCCCC, 2, x, y) #define _src_symcipher_aes_ct_cSWAP8(x, y) _src_symcipher_aes_ct_cSWAPN(0x0F0F0F0F, 0xF0F0F0F0, 4, x, y) _src_symcipher_aes_ct_cSWAP2(q[0], q[1]); _src_symcipher_aes_ct_cSWAP2(q[2], q[3]); _src_symcipher_aes_ct_cSWAP2(q[4], q[5]); _src_symcipher_aes_ct_cSWAP2(q[6], q[7]); _src_symcipher_aes_ct_cSWAP4(q[0], q[2]); _src_symcipher_aes_ct_cSWAP4(q[1], q[3]); _src_symcipher_aes_ct_cSWAP4(q[4], q[6]); _src_symcipher_aes_ct_cSWAP4(q[5], q[7]); _src_symcipher_aes_ct_cSWAP8(q[0], q[4]); _src_symcipher_aes_ct_cSWAP8(q[1], q[5]); _src_symcipher_aes_ct_cSWAP8(q[2], q[6]); _src_symcipher_aes_ct_cSWAP8(q[3], q[7]); } static const unsigned char _src_symcipher_aes_ct_cRcon[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36 }; static uint32_t _src_symcipher_aes_ct_csub_word(uint32_t x) { uint32_t q[8]; int i; for (i = 0; i < 8; i ++) { q[i] = x; } br_aes_ct_ortho(q); br_aes_ct_bitslice_Sbox(q); br_aes_ct_ortho(q); return q[0]; } /* see inner.h */ unsigned br_aes_ct_keysched(uint32_t *comp_skey, const void *key, size_t key_len) { unsigned num_rounds; int i, j, k, nk, nkf; uint32_t tmp; uint32_t skey[120]; switch (key_len) { case 16: num_rounds = 10; break; case 24: num_rounds = 12; break; case 32: num_rounds = 14; break; default: /* abort(); */ return 0; } nk = (int)(key_len >> 2); nkf = (int)((num_rounds + 1) << 2); tmp = 0; for (i = 0; i < nk; i ++) { tmp = br_dec32le((const unsigned char *)key + (i << 2)); skey[(i << 1) + 0] = tmp; skey[(i << 1) + 1] = tmp; } for (i = nk, j = 0, k = 0; i < nkf; i ++) { if (j == 0) { tmp = (tmp << 24) | (tmp >> 8); tmp = _src_symcipher_aes_ct_csub_word(tmp) ^ _src_symcipher_aes_ct_cRcon[k]; } else if (nk > 6 && j == 4) { tmp = _src_symcipher_aes_ct_csub_word(tmp); } tmp ^= skey[(i - nk) << 1]; skey[(i << 1) + 0] = tmp; skey[(i << 1) + 1] = tmp; if (++ j == nk) { j = 0; k ++; } } for (i = 0; i < nkf; i += 4) { br_aes_ct_ortho(skey + (i << 1)); } for (i = 0, j = 0; i < nkf; i ++, j += 2) { comp_skey[i] = (skey[j + 0] & 0x55555555) | (skey[j + 1] & 0xAAAAAAAA); } return num_rounds; } /* see inner.h */ void br_aes_ct_skey_expand(uint32_t *skey, unsigned num_rounds, const uint32_t *comp_skey) { unsigned u, v, n; n = (num_rounds + 1) << 2; for (u = 0, v = 0; u < n; u ++, v += 2) { uint32_t x, y; x = y = comp_skey[u]; x &= 0x55555555; skey[v + 0] = x | (x << 1); y &= 0xAAAAAAAA; skey[v + 1] = y | (y >> 1); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_aes_ct64_bitslice_Sbox(uint64_t *q) { /* * This S-box implementation is a straightforward translation of * the circuit described by Boyar and Peralta in "A new * combinational logic minimization technique with applications * to cryptology" (https://eprint.iacr.org/2009/191.pdf). * * Note that variables x* (input) and s* (output) are numbered * in "reverse" order (x0 is the high bit, x7 is the low bit). */ uint64_t x0, x1, x2, x3, x4, x5, x6, x7; uint64_t y1, y2, y3, y4, y5, y6, y7, y8, y9; uint64_t y10, y11, y12, y13, y14, y15, y16, y17, y18, y19; uint64_t y20, y21; uint64_t z0, z1, z2, z3, z4, z5, z6, z7, z8, z9; uint64_t z10, z11, z12, z13, z14, z15, z16, z17; uint64_t t0, t1, t2, t3, t4, t5, t6, t7, t8, t9; uint64_t t10, t11, t12, t13, t14, t15, t16, t17, t18, t19; uint64_t t20, t21, t22, t23, t24, t25, t26, t27, t28, t29; uint64_t t30, t31, t32, t33, t34, t35, t36, t37, t38, t39; uint64_t t40, t41, t42, t43, t44, t45, t46, t47, t48, t49; uint64_t t50, t51, t52, t53, t54, t55, t56, t57, t58, t59; uint64_t t60, t61, t62, t63, t64, t65, t66, t67; uint64_t s0, s1, s2, s3, s4, s5, s6, s7; x0 = q[7]; x1 = q[6]; x2 = q[5]; x3 = q[4]; x4 = q[3]; x5 = q[2]; x6 = q[1]; x7 = q[0]; /* * Top linear transformation. */ y14 = x3 ^ x5; y13 = x0 ^ x6; y9 = x0 ^ x3; y8 = x0 ^ x5; t0 = x1 ^ x2; y1 = t0 ^ x7; y4 = y1 ^ x3; y12 = y13 ^ y14; y2 = y1 ^ x0; y5 = y1 ^ x6; y3 = y5 ^ y8; t1 = x4 ^ y12; y15 = t1 ^ x5; y20 = t1 ^ x1; y6 = y15 ^ x7; y10 = y15 ^ t0; y11 = y20 ^ y9; y7 = x7 ^ y11; y17 = y10 ^ y11; y19 = y10 ^ y8; y16 = t0 ^ y11; y21 = y13 ^ y16; y18 = x0 ^ y16; /* * Non-linear section. */ t2 = y12 & y15; t3 = y3 & y6; t4 = t3 ^ t2; t5 = y4 & x7; t6 = t5 ^ t2; t7 = y13 & y16; t8 = y5 & y1; t9 = t8 ^ t7; t10 = y2 & y7; t11 = t10 ^ t7; t12 = y9 & y11; t13 = y14 & y17; t14 = t13 ^ t12; t15 = y8 & y10; t16 = t15 ^ t12; t17 = t4 ^ t14; t18 = t6 ^ t16; t19 = t9 ^ t14; t20 = t11 ^ t16; t21 = t17 ^ y20; t22 = t18 ^ y19; t23 = t19 ^ y21; t24 = t20 ^ y18; t25 = t21 ^ t22; t26 = t21 & t23; t27 = t24 ^ t26; t28 = t25 & t27; t29 = t28 ^ t22; t30 = t23 ^ t24; t31 = t22 ^ t26; t32 = t31 & t30; t33 = t32 ^ t24; t34 = t23 ^ t33; t35 = t27 ^ t33; t36 = t24 & t35; t37 = t36 ^ t34; t38 = t27 ^ t36; t39 = t29 & t38; t40 = t25 ^ t39; t41 = t40 ^ t37; t42 = t29 ^ t33; t43 = t29 ^ t40; t44 = t33 ^ t37; t45 = t42 ^ t41; z0 = t44 & y15; z1 = t37 & y6; z2 = t33 & x7; z3 = t43 & y16; z4 = t40 & y1; z5 = t29 & y7; z6 = t42 & y11; z7 = t45 & y17; z8 = t41 & y10; z9 = t44 & y12; z10 = t37 & y3; z11 = t33 & y4; z12 = t43 & y13; z13 = t40 & y5; z14 = t29 & y2; z15 = t42 & y9; z16 = t45 & y14; z17 = t41 & y8; /* * Bottom linear transformation. */ t46 = z15 ^ z16; t47 = z10 ^ z11; t48 = z5 ^ z13; t49 = z9 ^ z10; t50 = z2 ^ z12; t51 = z2 ^ z5; t52 = z7 ^ z8; t53 = z0 ^ z3; t54 = z6 ^ z7; t55 = z16 ^ z17; t56 = z12 ^ t48; t57 = t50 ^ t53; t58 = z4 ^ t46; t59 = z3 ^ t54; t60 = t46 ^ t57; t61 = z14 ^ t57; t62 = t52 ^ t58; t63 = t49 ^ t58; t64 = z4 ^ t59; t65 = t61 ^ t62; t66 = z1 ^ t63; s0 = t59 ^ t63; s6 = t56 ^ ~t62; s7 = t48 ^ ~t60; t67 = t64 ^ t65; s3 = t53 ^ t66; s4 = t51 ^ t66; s5 = t47 ^ t65; s1 = t64 ^ ~s3; s2 = t55 ^ ~t67; q[7] = s0; q[6] = s1; q[5] = s2; q[4] = s3; q[3] = s4; q[2] = s5; q[1] = s6; q[0] = s7; } /* see inner.h */ void br_aes_ct64_ortho(uint64_t *q) { #define _src_symcipher_aes_ct64_cSWAPN(cl, ch, s, x, y) do { \ uint64_t a, b; \ a = (x); \ b = (y); \ (x) = (a & (uint64_t)cl) | ((b & (uint64_t)cl) << (s)); \ (y) = ((a & (uint64_t)ch) >> (s)) | (b & (uint64_t)ch); \ } while (0) #define _src_symcipher_aes_ct64_cSWAP2(x, y) _src_symcipher_aes_ct64_cSWAPN(0x5555555555555555, 0xAAAAAAAAAAAAAAAA, 1, x, y) #define _src_symcipher_aes_ct64_cSWAP4(x, y) _src_symcipher_aes_ct64_cSWAPN(0x3333333333333333, 0xCCCCCCCCCCCCCCCC, 2, x, y) #define _src_symcipher_aes_ct64_cSWAP8(x, y) _src_symcipher_aes_ct64_cSWAPN(0x0F0F0F0F0F0F0F0F, 0xF0F0F0F0F0F0F0F0, 4, x, y) _src_symcipher_aes_ct64_cSWAP2(q[0], q[1]); _src_symcipher_aes_ct64_cSWAP2(q[2], q[3]); _src_symcipher_aes_ct64_cSWAP2(q[4], q[5]); _src_symcipher_aes_ct64_cSWAP2(q[6], q[7]); _src_symcipher_aes_ct64_cSWAP4(q[0], q[2]); _src_symcipher_aes_ct64_cSWAP4(q[1], q[3]); _src_symcipher_aes_ct64_cSWAP4(q[4], q[6]); _src_symcipher_aes_ct64_cSWAP4(q[5], q[7]); _src_symcipher_aes_ct64_cSWAP8(q[0], q[4]); _src_symcipher_aes_ct64_cSWAP8(q[1], q[5]); _src_symcipher_aes_ct64_cSWAP8(q[2], q[6]); _src_symcipher_aes_ct64_cSWAP8(q[3], q[7]); } /* see inner.h */ void br_aes_ct64_interleave_in(uint64_t *q0, uint64_t *q1, const uint32_t *w) { uint64_t x0, x1, x2, x3; x0 = w[0]; x1 = w[1]; x2 = w[2]; x3 = w[3]; x0 |= (x0 << 16); x1 |= (x1 << 16); x2 |= (x2 << 16); x3 |= (x3 << 16); x0 &= (uint64_t)0x0000FFFF0000FFFF; x1 &= (uint64_t)0x0000FFFF0000FFFF; x2 &= (uint64_t)0x0000FFFF0000FFFF; x3 &= (uint64_t)0x0000FFFF0000FFFF; x0 |= (x0 << 8); x1 |= (x1 << 8); x2 |= (x2 << 8); x3 |= (x3 << 8); x0 &= (uint64_t)0x00FF00FF00FF00FF; x1 &= (uint64_t)0x00FF00FF00FF00FF; x2 &= (uint64_t)0x00FF00FF00FF00FF; x3 &= (uint64_t)0x00FF00FF00FF00FF; *q0 = x0 | (x2 << 8); *q1 = x1 | (x3 << 8); } /* see inner.h */ void br_aes_ct64_interleave_out(uint32_t *w, uint64_t q0, uint64_t q1) { uint64_t x0, x1, x2, x3; x0 = q0 & (uint64_t)0x00FF00FF00FF00FF; x1 = q1 & (uint64_t)0x00FF00FF00FF00FF; x2 = (q0 >> 8) & (uint64_t)0x00FF00FF00FF00FF; x3 = (q1 >> 8) & (uint64_t)0x00FF00FF00FF00FF; x0 |= (x0 >> 8); x1 |= (x1 >> 8); x2 |= (x2 >> 8); x3 |= (x3 >> 8); x0 &= (uint64_t)0x0000FFFF0000FFFF; x1 &= (uint64_t)0x0000FFFF0000FFFF; x2 &= (uint64_t)0x0000FFFF0000FFFF; x3 &= (uint64_t)0x0000FFFF0000FFFF; w[0] = (uint32_t)x0 | (uint32_t)(x0 >> 16); w[1] = (uint32_t)x1 | (uint32_t)(x1 >> 16); w[2] = (uint32_t)x2 | (uint32_t)(x2 >> 16); w[3] = (uint32_t)x3 | (uint32_t)(x3 >> 16); } static const unsigned char _src_symcipher_aes_ct64_cRcon[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36 }; static uint32_t _src_symcipher_aes_ct64_csub_word(uint32_t x) { uint64_t q[8]; memset(q, 0, sizeof q); q[0] = x; br_aes_ct64_ortho(q); br_aes_ct64_bitslice_Sbox(q); br_aes_ct64_ortho(q); return (uint32_t)q[0]; } /* see inner.h */ unsigned br_aes_ct64_keysched(uint64_t *comp_skey, const void *key, size_t key_len) { unsigned num_rounds; int i, j, k, nk, nkf; uint32_t tmp; uint32_t skey[60]; switch (key_len) { case 16: num_rounds = 10; break; case 24: num_rounds = 12; break; case 32: num_rounds = 14; break; default: /* abort(); */ return 0; } nk = (int)(key_len >> 2); nkf = (int)((num_rounds + 1) << 2); br_range_dec32le(skey, (key_len >> 2), key); tmp = skey[(key_len >> 2) - 1]; for (i = nk, j = 0, k = 0; i < nkf; i ++) { if (j == 0) { tmp = (tmp << 24) | (tmp >> 8); tmp = _src_symcipher_aes_ct64_csub_word(tmp) ^ _src_symcipher_aes_ct64_cRcon[k]; } else if (nk > 6 && j == 4) { tmp = _src_symcipher_aes_ct64_csub_word(tmp); } tmp ^= skey[i - nk]; skey[i] = tmp; if (++ j == nk) { j = 0; k ++; } } for (i = 0, j = 0; i < nkf; i += 4, j += 2) { uint64_t q[8]; br_aes_ct64_interleave_in(&q[0], &q[4], skey + i); q[1] = q[0]; q[2] = q[0]; q[3] = q[0]; q[5] = q[4]; q[6] = q[4]; q[7] = q[4]; br_aes_ct64_ortho(q); comp_skey[j + 0] = (q[0] & (uint64_t)0x1111111111111111) | (q[1] & (uint64_t)0x2222222222222222) | (q[2] & (uint64_t)0x4444444444444444) | (q[3] & (uint64_t)0x8888888888888888); comp_skey[j + 1] = (q[4] & (uint64_t)0x1111111111111111) | (q[5] & (uint64_t)0x2222222222222222) | (q[6] & (uint64_t)0x4444444444444444) | (q[7] & (uint64_t)0x8888888888888888); } return num_rounds; } /* see inner.h */ void br_aes_ct64_skey_expand(uint64_t *skey, unsigned num_rounds, const uint64_t *comp_skey) { unsigned u, v, n; n = (num_rounds + 1) << 1; for (u = 0, v = 0; u < n; u ++, v += 4) { uint64_t x0, x1, x2, x3; x0 = x1 = x2 = x3 = comp_skey[u]; x0 &= (uint64_t)0x1111111111111111; x1 &= (uint64_t)0x2222222222222222; x2 &= (uint64_t)0x4444444444444444; x3 &= (uint64_t)0x8888888888888888; x1 >>= 1; x2 >>= 2; x3 >>= 3; skey[v + 0] = (x0 << 4) - x0; skey[v + 1] = (x1 << 4) - x1; skey[v + 2] = (x2 << 4) - x2; skey[v + 3] = (x3 << 4) - x3; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct64_cbcdec_init(br_aes_ct64_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct64_cbcdec_vtable; ctx->num_rounds = br_aes_ct64_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_ct64_cbcdec_run(const br_aes_ct64_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf; uint64_t sk_exp[120]; uint32_t ivw[4]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); br_range_dec32le(ivw, 4, iv); buf = (unsigned char*)data; while (len > 0) { uint64_t q[8]; uint32_t w1[16], w2[16]; int i; if (len >= 64) { br_range_dec32le(w1, 16, buf); } else { br_range_dec32le(w1, len >> 2, buf); } for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_in( &q[i], &q[i + 4], w1 + (i << 2)); } br_aes_ct64_ortho(q); br_aes_ct64_bitslice_decrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_out( w2 + (i << 2), q[i], q[i + 4]); } for (i = 0; i < 4; i ++) { w2[i] ^= ivw[i]; } if (len >= 64) { for (i = 4; i < 16; i ++) { w2[i] ^= w1[i - 4]; } memcpy(ivw, w1 + 12, sizeof ivw); br_range_enc32le(buf, w2, 16); } else { int j; j = (int)(len >> 2); for (i = 4; i < j; i ++) { w2[i] ^= w1[i - 4]; } memcpy(ivw, w1 + j - 4, sizeof ivw); br_range_enc32le(buf, w2, j); break; } buf += 64; len -= 64; } br_range_enc32le(iv, ivw, 4); } /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_ct64_cbcdec_vtable = { sizeof(br_aes_ct64_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_ct64_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_ct64_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct64_cbcenc_init(br_aes_ct64_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct64_cbcenc_vtable; ctx->num_rounds = br_aes_ct64_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_ct64_cbcenc_run(const br_aes_ct64_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf; uint64_t sk_exp[120]; uint32_t ivw[4]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); br_range_dec32le(ivw, 4, iv); buf = (unsigned char*)data; while (len > 0) { uint32_t w[4]; uint64_t q[8]; w[0] = ivw[0] ^ br_dec32le(buf); w[1] = ivw[1] ^ br_dec32le(buf + 4); w[2] = ivw[2] ^ br_dec32le(buf + 8); w[3] = ivw[3] ^ br_dec32le(buf + 12); br_aes_ct64_interleave_in(&q[0], &q[4], w); br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); br_aes_ct64_interleave_out(w, q[0], q[4]); memcpy(ivw, w, sizeof w); br_enc32le(buf, w[0]); br_enc32le(buf + 4, w[1]); br_enc32le(buf + 8, w[2]); br_enc32le(buf + 12, w[3]); buf += 16; len -= 16; } br_range_enc32le(iv, ivw, 4); } /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_ct64_cbcenc_vtable = { sizeof(br_aes_ct64_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_ct64_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_ct64_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct64_ctr_init(br_aes_ct64_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct64_ctr_vtable; ctx->num_rounds = br_aes_ct64_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_ct64_ctr_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ uint32_t br_aes_ct64_ctr_run(const br_aes_ct64_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; uint32_t ivw[16]; uint64_t sk_exp[120]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); br_range_dec32le(ivw, 3, iv); memcpy(ivw + 4, ivw, 3 * sizeof(uint32_t)); memcpy(ivw + 8, ivw, 3 * sizeof(uint32_t)); memcpy(ivw + 12, ivw, 3 * sizeof(uint32_t)); buf = (unsigned char*)data; while (len > 0) { uint64_t q[8]; uint32_t w[16]; unsigned char tmp[64]; int i; /* * TODO: see if we can save on the first br_aes_ct64_ortho() * call, since iv0/iv1/iv2 are constant for the whole run. */ memcpy(w, ivw, sizeof ivw); w[3] = br_swap32(cc); w[7] = br_swap32(cc + 1); w[11] = br_swap32(cc + 2); w[15] = br_swap32(cc + 3); for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_in( &q[i], &q[i + 4], w + (i << 2)); } br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_out( w + (i << 2), q[i], q[i + 4]); } br_range_enc32le(tmp, w, 16); if (len <= 64) { _src_symcipher_aes_ct64_ctr_cxorbuf(buf, tmp, len); cc += (uint32_t)len >> 4; break; } _src_symcipher_aes_ct64_ctr_cxorbuf(buf, tmp, 64); buf += 64; len -= 64; cc += 4; } return cc; } /* see bearssl_block.h */ const br_block_ctr_class br_aes_ct64_ctr_vtable = { sizeof(br_aes_ct64_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_ct64_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_ct64_ctr_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct64_ctrcbc_init(br_aes_ct64_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct64_ctrcbc_vtable; ctx->num_rounds = br_aes_ct64_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_ct64_ctrcbc_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ void br_aes_ct64_ctrcbc_ctr(const br_aes_ct64_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint64_t sk_exp[120]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); buf = (unsigned char*)data; while (len > 0) { uint64_t q[8]; uint32_t w[16]; unsigned char tmp[64]; int i, j; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct64_ctrcbc_cbyteswap them. */ j = (len >= 64) ? 16 : (int)(len >> 2); for (i = 0; i < j; i += 4) { uint32_t carry; w[i + 0] = br_swap32(iv0); w[i + 1] = br_swap32(iv1); w[i + 2] = br_swap32(iv2); w[i + 3] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; } memset(w + i, 0, (16 - i) * sizeof(uint32_t)); for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_in( &q[i], &q[i + 4], w + (i << 2)); } br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); for (i = 0; i < 4; i ++) { br_aes_ct64_interleave_out( w + (i << 2), q[i], q[i + 4]); } br_range_enc32le(tmp, w, 16); if (len <= 64) { _src_symcipher_aes_ct64_ctrcbc_cxorbuf(buf, tmp, len); break; } _src_symcipher_aes_ct64_ctrcbc_cxorbuf(buf, tmp, 64); buf += 64; len -= 64; } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); } /* see bearssl_block.h */ void br_aes_ct64_ctrcbc_mac(const br_aes_ct64_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { const unsigned char *buf; uint32_t cm0, cm1, cm2, cm3; uint64_t q[8]; uint64_t sk_exp[120]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); buf = (unsigned char*)data; memset(q, 0, sizeof q); while (len > 0) { uint32_t w[4]; w[0] = cm0 ^ br_dec32le(buf + 0); w[1] = cm1 ^ br_dec32le(buf + 4); w[2] = cm2 ^ br_dec32le(buf + 8); w[3] = cm3 ^ br_dec32le(buf + 12); br_aes_ct64_interleave_in(&q[0], &q[4], w); br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); br_aes_ct64_interleave_out(w, q[0], q[4]); cm0 = w[0]; cm1 = w[1]; cm2 = w[2]; cm3 = w[3]; buf += 16; len -= 16; } br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ void br_aes_ct64_ctrcbc_encrypt(const br_aes_ct64_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { /* * When encrypting, the CBC-MAC processing must be lagging by * one block, since it operates on the encrypted values, so * it must wait for that encryption to complete. */ unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t cm0, cm1, cm2, cm3; uint64_t sk_exp[120]; uint64_t q[8]; int first_iter; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); /* * The current CBC-MAC value is kept in little-endian convention. */ cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); buf = (unsigned char*)data; first_iter = 1; memset(q, 0, sizeof q); while (len > 0) { uint32_t w[8], carry; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct64_ctrcbc_cbyteswap them. */ w[0] = br_swap32(iv0); w[1] = br_swap32(iv1); w[2] = br_swap32(iv2); w[3] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; /* * The block for CBC-MAC. */ w[4] = cm0; w[5] = cm1; w[6] = cm2; w[7] = cm3; br_aes_ct64_interleave_in(&q[0], &q[4], w); br_aes_ct64_interleave_in(&q[1], &q[5], w + 4); br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); br_aes_ct64_interleave_out(w, q[0], q[4]); br_aes_ct64_interleave_out(w + 4, q[1], q[5]); /* * We do the XOR with the plaintext in 32-bit registers, * so that the value are available for CBC-MAC processing * as well. */ w[0] ^= br_dec32le(buf + 0); w[1] ^= br_dec32le(buf + 4); w[2] ^= br_dec32le(buf + 8); w[3] ^= br_dec32le(buf + 12); br_enc32le(buf + 0, w[0]); br_enc32le(buf + 4, w[1]); br_enc32le(buf + 8, w[2]); br_enc32le(buf + 12, w[3]); buf += 16; len -= 16; /* * We set the cm* values to the block to encrypt in the * next iteration. */ if (first_iter) { first_iter = 0; cm0 ^= w[0]; cm1 ^= w[1]; cm2 ^= w[2]; cm3 ^= w[3]; } else { cm0 = w[0] ^ w[4]; cm1 = w[1] ^ w[5]; cm2 = w[2] ^ w[6]; cm3 = w[3] ^ w[7]; } /* * If this was the last iteration, then compute the * extra block encryption to complete CBC-MAC. */ if (len == 0) { w[0] = cm0; w[1] = cm1; w[2] = cm2; w[3] = cm3; br_aes_ct64_interleave_in(&q[0], &q[4], w); br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt( ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); br_aes_ct64_interleave_out(w, q[0], q[4]); cm0 = w[0]; cm1 = w[1]; cm2 = w[2]; cm3 = w[3]; break; } } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ void br_aes_ct64_ctrcbc_decrypt(const br_aes_ct64_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t cm0, cm1, cm2, cm3; uint64_t sk_exp[120]; uint64_t q[8]; br_aes_ct64_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); /* * The current CBC-MAC value is kept in little-endian convention. */ cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); buf = (unsigned char*)data; memset(q, 0, sizeof q); while (len > 0) { uint32_t w[8], carry; unsigned char tmp[16]; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct64_ctrcbc_cbyteswap them. */ w[0] = br_swap32(iv0); w[1] = br_swap32(iv1); w[2] = br_swap32(iv2); w[3] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; /* * The block for CBC-MAC. */ w[4] = cm0 ^ br_dec32le(buf + 0); w[5] = cm1 ^ br_dec32le(buf + 4); w[6] = cm2 ^ br_dec32le(buf + 8); w[7] = cm3 ^ br_dec32le(buf + 12); br_aes_ct64_interleave_in(&q[0], &q[4], w); br_aes_ct64_interleave_in(&q[1], &q[5], w + 4); br_aes_ct64_ortho(q); br_aes_ct64_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct64_ortho(q); br_aes_ct64_interleave_out(w, q[0], q[4]); br_aes_ct64_interleave_out(w + 4, q[1], q[5]); br_enc32le(tmp + 0, w[0]); br_enc32le(tmp + 4, w[1]); br_enc32le(tmp + 8, w[2]); br_enc32le(tmp + 12, w[3]); _src_symcipher_aes_ct64_ctrcbc_cxorbuf(buf, tmp, 16); cm0 = w[4]; cm1 = w[5]; cm2 = w[6]; cm3 = w[7]; buf += 16; len -= 16; } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_ct64_ctrcbc_vtable = { sizeof(br_aes_ct64_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_ct64_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_ct64_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_ct64_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_ct64_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_ct64_ctrcbc_mac }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_aes_ct64_bitslice_invSbox(uint64_t *q) { /* * See br_aes_ct_bitslice_invSbox(). This is the natural extension * to 64-bit registers. */ uint64_t q0, q1, q2, q3, q4, q5, q6, q7; q0 = ~q[0]; q1 = ~q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = ~q[5]; q6 = ~q[6]; q7 = q[7]; q[7] = q1 ^ q4 ^ q6; q[6] = q0 ^ q3 ^ q5; q[5] = q7 ^ q2 ^ q4; q[4] = q6 ^ q1 ^ q3; q[3] = q5 ^ q0 ^ q2; q[2] = q4 ^ q7 ^ q1; q[1] = q3 ^ q6 ^ q0; q[0] = q2 ^ q5 ^ q7; br_aes_ct64_bitslice_Sbox(q); q0 = ~q[0]; q1 = ~q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = ~q[5]; q6 = ~q[6]; q7 = q[7]; q[7] = q1 ^ q4 ^ q6; q[6] = q0 ^ q3 ^ q5; q[5] = q7 ^ q2 ^ q4; q[4] = q6 ^ q1 ^ q3; q[3] = q5 ^ q0 ^ q2; q[2] = q4 ^ q7 ^ q1; q[1] = q3 ^ q6 ^ q0; q[0] = q2 ^ q5 ^ q7; } static void _src_symcipher_aes_ct64_dec_cadd_round_key(uint64_t *q, const uint64_t *sk) { int i; for (i = 0; i < 8; i ++) { q[i] ^= sk[i]; } } static void inv__src_symcipher_aes_ct64_dec_cshift_rows(uint64_t *q) { int i; for (i = 0; i < 8; i ++) { uint64_t x; x = q[i]; q[i] = (x & (uint64_t)0x000000000000FFFF) | ((x & (uint64_t)0x000000000FFF0000) << 4) | ((x & (uint64_t)0x00000000F0000000) >> 12) | ((x & (uint64_t)0x000000FF00000000) << 8) | ((x & (uint64_t)0x0000FF0000000000) >> 8) | ((x & (uint64_t)0x000F000000000000) << 12) | ((x & (uint64_t)0xFFF0000000000000) >> 4); } } static inline uint64_t _src_symcipher_aes_ct64_dec_crotr32(uint64_t x) { return (x << 32) | (x >> 32); } static void inv__src_symcipher_aes_ct64_dec_cmix_columns(uint64_t *q) { uint64_t q0, q1, q2, q3, q4, q5, q6, q7; uint64_t r0, r1, r2, r3, r4, r5, r6, r7; q0 = q[0]; q1 = q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = q[5]; q6 = q[6]; q7 = q[7]; r0 = (q0 >> 16) | (q0 << 48); r1 = (q1 >> 16) | (q1 << 48); r2 = (q2 >> 16) | (q2 << 48); r3 = (q3 >> 16) | (q3 << 48); r4 = (q4 >> 16) | (q4 << 48); r5 = (q5 >> 16) | (q5 << 48); r6 = (q6 >> 16) | (q6 << 48); r7 = (q7 >> 16) | (q7 << 48); q[0] = q5 ^ q6 ^ q7 ^ r0 ^ r5 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q0 ^ q5 ^ q6 ^ r0 ^ r5); q[1] = q0 ^ q5 ^ r0 ^ r1 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q1 ^ q5 ^ q7 ^ r1 ^ r5 ^ r6); q[2] = q0 ^ q1 ^ q6 ^ r1 ^ r2 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q0 ^ q2 ^ q6 ^ r2 ^ r6 ^ r7); q[3] = q0 ^ q1 ^ q2 ^ q5 ^ q6 ^ r0 ^ r2 ^ r3 ^ r5 ^ _src_symcipher_aes_ct64_dec_crotr32(q0 ^ q1 ^ q3 ^ q5 ^ q6 ^ q7 ^ r0 ^ r3 ^ r5 ^ r7); q[4] = q1 ^ q2 ^ q3 ^ q5 ^ r1 ^ r3 ^ r4 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q1 ^ q2 ^ q4 ^ q5 ^ q7 ^ r1 ^ r4 ^ r5 ^ r6); q[5] = q2 ^ q3 ^ q4 ^ q6 ^ r2 ^ r4 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q2 ^ q3 ^ q5 ^ q6 ^ r2 ^ r5 ^ r6 ^ r7); q[6] = q3 ^ q4 ^ q5 ^ q7 ^ r3 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q3 ^ q4 ^ q6 ^ q7 ^ r3 ^ r6 ^ r7); q[7] = q4 ^ q5 ^ q6 ^ r4 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_dec_crotr32(q4 ^ q5 ^ q7 ^ r4 ^ r7); } /* see inner.h */ void br_aes_ct64_bitslice_decrypt(unsigned num_rounds, const uint64_t *skey, uint64_t *q) { unsigned u; _src_symcipher_aes_ct64_dec_cadd_round_key(q, skey + (num_rounds << 3)); for (u = num_rounds - 1; u > 0; u --) { inv__src_symcipher_aes_ct64_dec_cshift_rows(q); br_aes_ct64_bitslice_invSbox(q); _src_symcipher_aes_ct64_dec_cadd_round_key(q, skey + (u << 3)); inv__src_symcipher_aes_ct64_dec_cmix_columns(q); } inv__src_symcipher_aes_ct64_dec_cshift_rows(q); br_aes_ct64_bitslice_invSbox(q); _src_symcipher_aes_ct64_dec_cadd_round_key(q, skey); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static inline void _src_symcipher_aes_ct64_enc_cadd_round_key(uint64_t *q, const uint64_t *sk) { q[0] ^= sk[0]; q[1] ^= sk[1]; q[2] ^= sk[2]; q[3] ^= sk[3]; q[4] ^= sk[4]; q[5] ^= sk[5]; q[6] ^= sk[6]; q[7] ^= sk[7]; } static inline void _src_symcipher_aes_ct64_enc_cshift_rows(uint64_t *q) { int i; for (i = 0; i < 8; i ++) { uint64_t x; x = q[i]; q[i] = (x & (uint64_t)0x000000000000FFFF) | ((x & (uint64_t)0x00000000FFF00000) >> 4) | ((x & (uint64_t)0x00000000000F0000) << 12) | ((x & (uint64_t)0x0000FF0000000000) >> 8) | ((x & (uint64_t)0x000000FF00000000) << 8) | ((x & (uint64_t)0xF000000000000000) >> 12) | ((x & (uint64_t)0x0FFF000000000000) << 4); } } static inline uint64_t _src_symcipher_aes_ct64_enc_crotr32(uint64_t x) { return (x << 32) | (x >> 32); } static inline void _src_symcipher_aes_ct64_enc_cmix_columns(uint64_t *q) { uint64_t q0, q1, q2, q3, q4, q5, q6, q7; uint64_t r0, r1, r2, r3, r4, r5, r6, r7; q0 = q[0]; q1 = q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = q[5]; q6 = q[6]; q7 = q[7]; r0 = (q0 >> 16) | (q0 << 48); r1 = (q1 >> 16) | (q1 << 48); r2 = (q2 >> 16) | (q2 << 48); r3 = (q3 >> 16) | (q3 << 48); r4 = (q4 >> 16) | (q4 << 48); r5 = (q5 >> 16) | (q5 << 48); r6 = (q6 >> 16) | (q6 << 48); r7 = (q7 >> 16) | (q7 << 48); q[0] = q7 ^ r7 ^ r0 ^ _src_symcipher_aes_ct64_enc_crotr32(q0 ^ r0); q[1] = q0 ^ r0 ^ q7 ^ r7 ^ r1 ^ _src_symcipher_aes_ct64_enc_crotr32(q1 ^ r1); q[2] = q1 ^ r1 ^ r2 ^ _src_symcipher_aes_ct64_enc_crotr32(q2 ^ r2); q[3] = q2 ^ r2 ^ q7 ^ r7 ^ r3 ^ _src_symcipher_aes_ct64_enc_crotr32(q3 ^ r3); q[4] = q3 ^ r3 ^ q7 ^ r7 ^ r4 ^ _src_symcipher_aes_ct64_enc_crotr32(q4 ^ r4); q[5] = q4 ^ r4 ^ r5 ^ _src_symcipher_aes_ct64_enc_crotr32(q5 ^ r5); q[6] = q5 ^ r5 ^ r6 ^ _src_symcipher_aes_ct64_enc_crotr32(q6 ^ r6); q[7] = q6 ^ r6 ^ r7 ^ _src_symcipher_aes_ct64_enc_crotr32(q7 ^ r7); } /* see inner.h */ void br_aes_ct64_bitslice_encrypt(unsigned num_rounds, const uint64_t *skey, uint64_t *q) { unsigned u; _src_symcipher_aes_ct64_enc_cadd_round_key(q, skey); for (u = 1; u < num_rounds; u ++) { br_aes_ct64_bitslice_Sbox(q); _src_symcipher_aes_ct64_enc_cshift_rows(q); _src_symcipher_aes_ct64_enc_cmix_columns(q); _src_symcipher_aes_ct64_enc_cadd_round_key(q, skey + (u << 3)); } br_aes_ct64_bitslice_Sbox(q); _src_symcipher_aes_ct64_enc_cshift_rows(q); _src_symcipher_aes_ct64_enc_cadd_round_key(q, skey + (num_rounds << 3)); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct_cbcdec_init(br_aes_ct_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct_cbcdec_vtable; ctx->num_rounds = br_aes_ct_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_ct_cbcdec_run(const br_aes_ct_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t sk_exp[120]; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); ivbuf = (unsigned char *)iv; iv0 = br_dec32le(ivbuf); iv1 = br_dec32le(ivbuf + 4); iv2 = br_dec32le(ivbuf + 8); iv3 = br_dec32le(ivbuf + 12); buf = (unsigned char*)data; while (len > 0) { uint32_t q[8], sq[8]; q[0] = br_dec32le(buf); q[2] = br_dec32le(buf + 4); q[4] = br_dec32le(buf + 8); q[6] = br_dec32le(buf + 12); if (len >= 32) { q[1] = br_dec32le(buf + 16); q[3] = br_dec32le(buf + 20); q[5] = br_dec32le(buf + 24); q[7] = br_dec32le(buf + 28); } else { q[1] = 0; q[3] = 0; q[5] = 0; q[7] = 0; } memcpy(sq, q, sizeof q); br_aes_ct_ortho(q); br_aes_ct_bitslice_decrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); br_enc32le(buf, q[0] ^ iv0); br_enc32le(buf + 4, q[2] ^ iv1); br_enc32le(buf + 8, q[4] ^ iv2); br_enc32le(buf + 12, q[6] ^ iv3); if (len < 32) { iv0 = sq[0]; iv1 = sq[2]; iv2 = sq[4]; iv3 = sq[6]; break; } br_enc32le(buf + 16, q[1] ^ sq[0]); br_enc32le(buf + 20, q[3] ^ sq[2]); br_enc32le(buf + 24, q[5] ^ sq[4]); br_enc32le(buf + 28, q[7] ^ sq[6]); iv0 = sq[1]; iv1 = sq[3]; iv2 = sq[5]; iv3 = sq[7]; buf += 32; len -= 32; } br_enc32le(ivbuf, iv0); br_enc32le(ivbuf + 4, iv1); br_enc32le(ivbuf + 8, iv2); br_enc32le(ivbuf + 12, iv3); } /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_ct_cbcdec_vtable = { sizeof(br_aes_ct_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_ct_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_ct_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct_cbcenc_init(br_aes_ct_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct_cbcenc_vtable; ctx->num_rounds = br_aes_ct_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_ct_cbcenc_run(const br_aes_ct_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; uint32_t q[8]; uint32_t iv0, iv1, iv2, iv3; uint32_t sk_exp[120]; q[1] = 0; q[3] = 0; q[5] = 0; q[7] = 0; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); ivbuf = (unsigned char *)iv; iv0 = br_dec32le(ivbuf); iv1 = br_dec32le(ivbuf + 4); iv2 = br_dec32le(ivbuf + 8); iv3 = br_dec32le(ivbuf + 12); buf = (unsigned char*)data; while (len > 0) { q[0] = iv0 ^ br_dec32le(buf); q[2] = iv1 ^ br_dec32le(buf + 4); q[4] = iv2 ^ br_dec32le(buf + 8); q[6] = iv3 ^ br_dec32le(buf + 12); br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); iv0 = q[0]; iv1 = q[2]; iv2 = q[4]; iv3 = q[6]; br_enc32le(buf, iv0); br_enc32le(buf + 4, iv1); br_enc32le(buf + 8, iv2); br_enc32le(buf + 12, iv3); buf += 16; len -= 16; } br_enc32le(ivbuf, iv0); br_enc32le(ivbuf + 4, iv1); br_enc32le(ivbuf + 8, iv2); br_enc32le(ivbuf + 12, iv3); } /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_ct_cbcenc_vtable = { sizeof(br_aes_ct_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_ct_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_ct_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct_ctr_init(br_aes_ct_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct_ctr_vtable; ctx->num_rounds = br_aes_ct_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_ct_ctr_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ uint32_t br_aes_ct_ctr_run(const br_aes_ct_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; const unsigned char *ivbuf; uint32_t iv0, iv1, iv2; uint32_t sk_exp[120]; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); ivbuf = (unsigned char *)iv; iv0 = br_dec32le(ivbuf); iv1 = br_dec32le(ivbuf + 4); iv2 = br_dec32le(ivbuf + 8); buf = (unsigned char*)data; while (len > 0) { uint32_t q[8]; unsigned char tmp[32]; /* * TODO: see if we can save on the first br_aes_ct_ortho() * call, since iv0/iv1/iv2 are constant for the whole run. */ q[0] = q[1] = iv0; q[2] = q[3] = iv1; q[4] = q[5] = iv2; q[6] = br_swap32(cc); q[7] = br_swap32(cc + 1); br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); br_enc32le(tmp, q[0]); br_enc32le(tmp + 4, q[2]); br_enc32le(tmp + 8, q[4]); br_enc32le(tmp + 12, q[6]); br_enc32le(tmp + 16, q[1]); br_enc32le(tmp + 20, q[3]); br_enc32le(tmp + 24, q[5]); br_enc32le(tmp + 28, q[7]); if (len <= 32) { _src_symcipher_aes_ct_ctr_cxorbuf(buf, tmp, len); cc ++; if (len > 16) { cc ++; } break; } _src_symcipher_aes_ct_ctr_cxorbuf(buf, tmp, 32); buf += 32; len -= 32; cc += 2; } return cc; } /* see bearssl_block.h */ const br_block_ctr_class br_aes_ct_ctr_vtable = { sizeof(br_aes_ct_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_ct_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_ct_ctr_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_ct_ctrcbc_init(br_aes_ct_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_ct_ctrcbc_vtable; ctx->num_rounds = br_aes_ct_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_ct_ctrcbc_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ void br_aes_ct_ctrcbc_ctr(const br_aes_ct_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t sk_exp[120]; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); buf = (unsigned char*)data; while (len > 0) { uint32_t q[8], carry; unsigned char tmp[32]; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct_ctrcbc_cbyteswap them. */ q[0] = br_swap32(iv0); q[2] = br_swap32(iv1); q[4] = br_swap32(iv2); q[6] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; q[1] = br_swap32(iv0); q[3] = br_swap32(iv1); q[5] = br_swap32(iv2); q[7] = br_swap32(iv3); if (len > 16) { iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; } br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); br_enc32le(tmp, q[0]); br_enc32le(tmp + 4, q[2]); br_enc32le(tmp + 8, q[4]); br_enc32le(tmp + 12, q[6]); br_enc32le(tmp + 16, q[1]); br_enc32le(tmp + 20, q[3]); br_enc32le(tmp + 24, q[5]); br_enc32le(tmp + 28, q[7]); if (len <= 32) { _src_symcipher_aes_ct_ctrcbc_cxorbuf(buf, tmp, len); break; } _src_symcipher_aes_ct_ctrcbc_cxorbuf(buf, tmp, 32); buf += 32; len -= 32; } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); } /* see bearssl_block.h */ void br_aes_ct_ctrcbc_mac(const br_aes_ct_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { const unsigned char *buf; uint32_t cm0, cm1, cm2, cm3; uint32_t q[8]; uint32_t sk_exp[120]; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); buf = (unsigned char*)data; cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); q[1] = 0; q[3] = 0; q[5] = 0; q[7] = 0; while (len > 0) { q[0] = cm0 ^ br_dec32le(buf + 0); q[2] = cm1 ^ br_dec32le(buf + 4); q[4] = cm2 ^ br_dec32le(buf + 8); q[6] = cm3 ^ br_dec32le(buf + 12); br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); cm0 = q[0]; cm1 = q[2]; cm2 = q[4]; cm3 = q[6]; buf += 16; len -= 16; } br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ void br_aes_ct_ctrcbc_encrypt(const br_aes_ct_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { /* * When encrypting, the CBC-MAC processing must be lagging by * one block, since it operates on the encrypted values, so * it must wait for that encryption to complete. */ unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t cm0, cm1, cm2, cm3; uint32_t sk_exp[120]; int first_iter; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); /* * The current CBC-MAC value is kept in little-endian convention. */ cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); buf = (unsigned char*)data; first_iter = 1; while (len > 0) { uint32_t q[8], carry; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct_ctrcbc_cbyteswap them. */ q[0] = br_swap32(iv0); q[2] = br_swap32(iv1); q[4] = br_swap32(iv2); q[6] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; /* * The odd values are used for CBC-MAC. */ q[1] = cm0; q[3] = cm1; q[5] = cm2; q[7] = cm3; br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); /* * We do the XOR with the plaintext in 32-bit registers, * so that the value are available for CBC-MAC processing * as well. */ q[0] ^= br_dec32le(buf + 0); q[2] ^= br_dec32le(buf + 4); q[4] ^= br_dec32le(buf + 8); q[6] ^= br_dec32le(buf + 12); br_enc32le(buf + 0, q[0]); br_enc32le(buf + 4, q[2]); br_enc32le(buf + 8, q[4]); br_enc32le(buf + 12, q[6]); buf += 16; len -= 16; /* * We set the cm* values to the block to encrypt in the * next iteration. */ if (first_iter) { first_iter = 0; cm0 ^= q[0]; cm1 ^= q[2]; cm2 ^= q[4]; cm3 ^= q[6]; } else { cm0 = q[0] ^ q[1]; cm1 = q[2] ^ q[3]; cm2 = q[4] ^ q[5]; cm3 = q[6] ^ q[7]; } /* * If this was the last iteration, then compute the * extra block encryption to complete CBC-MAC. */ if (len == 0) { q[0] = cm0; q[2] = cm1; q[4] = cm2; q[6] = cm3; br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); cm0 = q[0]; cm1 = q[2]; cm2 = q[4]; cm3 = q[6]; break; } } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ void br_aes_ct_ctrcbc_decrypt(const br_aes_ct_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { unsigned char *buf; unsigned char *ivbuf; uint32_t iv0, iv1, iv2, iv3; uint32_t cm0, cm1, cm2, cm3; uint32_t sk_exp[120]; br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); /* * We keep the counter as four 32-bit values, with big-endian * convention, because that's what is expected for purposes of * incrementing the counter value. */ ivbuf = (unsigned char*)ctr; iv0 = br_dec32be(ivbuf + 0); iv1 = br_dec32be(ivbuf + 4); iv2 = br_dec32be(ivbuf + 8); iv3 = br_dec32be(ivbuf + 12); /* * The current CBC-MAC value is kept in little-endian convention. */ cm0 = br_dec32le((unsigned char *)cbcmac + 0); cm1 = br_dec32le((unsigned char *)cbcmac + 4); cm2 = br_dec32le((unsigned char *)cbcmac + 8); cm3 = br_dec32le((unsigned char *)cbcmac + 12); buf = (unsigned char*)data; while (len > 0) { uint32_t q[8], carry; unsigned char tmp[16]; /* * The bitslice implementation expects values in * little-endian convention, so we have to _src_symcipher_aes_ct_ctrcbc_cbyteswap them. */ q[0] = br_swap32(iv0); q[2] = br_swap32(iv1); q[4] = br_swap32(iv2); q[6] = br_swap32(iv3); iv3 ++; carry = ~(iv3 | -iv3) >> 31; iv2 += carry; carry &= -(~(iv2 | -iv2) >> 31); iv1 += carry; carry &= -(~(iv1 | -iv1) >> 31); iv0 += carry; /* * The odd values are used for CBC-MAC. */ q[1] = cm0 ^ br_dec32le(buf + 0); q[3] = cm1 ^ br_dec32le(buf + 4); q[5] = cm2 ^ br_dec32le(buf + 8); q[7] = cm3 ^ br_dec32le(buf + 12); br_aes_ct_ortho(q); br_aes_ct_bitslice_encrypt(ctx->num_rounds, sk_exp, q); br_aes_ct_ortho(q); br_enc32le(tmp + 0, q[0]); br_enc32le(tmp + 4, q[2]); br_enc32le(tmp + 8, q[4]); br_enc32le(tmp + 12, q[6]); _src_symcipher_aes_ct_ctrcbc_cxorbuf(buf, tmp, 16); cm0 = q[1]; cm1 = q[3]; cm2 = q[5]; cm3 = q[7]; buf += 16; len -= 16; } br_enc32be(ivbuf + 0, iv0); br_enc32be(ivbuf + 4, iv1); br_enc32be(ivbuf + 8, iv2); br_enc32be(ivbuf + 12, iv3); br_enc32le((unsigned char *)cbcmac + 0, cm0); br_enc32le((unsigned char *)cbcmac + 4, cm1); br_enc32le((unsigned char *)cbcmac + 8, cm2); br_enc32le((unsigned char *)cbcmac + 12, cm3); } /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_ct_ctrcbc_vtable = { sizeof(br_aes_ct_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_ct_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_ct_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_ct_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_ct_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_ct_ctrcbc_mac }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_aes_ct_bitslice_invSbox(uint32_t *q) { /* * AES S-box is: * S(x) = A(I(x)) ^ 0x63 * where I() is inversion in GF(256), and A() is a linear * transform (0 is formally defined to be its own inverse). * Since inversion is an involution, the inverse S-box can be * computed from the S-box as: * iS(x) = B(S(B(x ^ 0x63)) ^ 0x63) * where B() is the inverse of A(). Indeed, for any y in GF(256): * iS(S(y)) = B(A(I(B(A(I(y)) ^ 0x63 ^ 0x63))) ^ 0x63 ^ 0x63) = y * * Note: we reuse the implementation of the forward S-box, * instead of duplicating it here, so that total code size is * lower. By merging the B() transforms into the S-box circuit * we could make faster CBC decryption, but CBC decryption is * already quite faster than CBC encryption because we can * process two blocks in parallel. */ uint32_t q0, q1, q2, q3, q4, q5, q6, q7; q0 = ~q[0]; q1 = ~q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = ~q[5]; q6 = ~q[6]; q7 = q[7]; q[7] = q1 ^ q4 ^ q6; q[6] = q0 ^ q3 ^ q5; q[5] = q7 ^ q2 ^ q4; q[4] = q6 ^ q1 ^ q3; q[3] = q5 ^ q0 ^ q2; q[2] = q4 ^ q7 ^ q1; q[1] = q3 ^ q6 ^ q0; q[0] = q2 ^ q5 ^ q7; br_aes_ct_bitslice_Sbox(q); q0 = ~q[0]; q1 = ~q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = ~q[5]; q6 = ~q[6]; q7 = q[7]; q[7] = q1 ^ q4 ^ q6; q[6] = q0 ^ q3 ^ q5; q[5] = q7 ^ q2 ^ q4; q[4] = q6 ^ q1 ^ q3; q[3] = q5 ^ q0 ^ q2; q[2] = q4 ^ q7 ^ q1; q[1] = q3 ^ q6 ^ q0; q[0] = q2 ^ q5 ^ q7; } static void _src_symcipher_aes_ct_dec_cadd_round_key(uint32_t *q, const uint32_t *sk) { int i; for (i = 0; i < 8; i ++) { q[i] ^= sk[i]; } } static void inv__src_symcipher_aes_ct_dec_cshift_rows(uint32_t *q) { int i; for (i = 0; i < 8; i ++) { uint32_t x; x = q[i]; q[i] = (x & 0x000000FF) | ((x & 0x00003F00) << 2) | ((x & 0x0000C000) >> 6) | ((x & 0x000F0000) << 4) | ((x & 0x00F00000) >> 4) | ((x & 0x03000000) << 6) | ((x & 0xFC000000) >> 2); } } static inline uint32_t _src_symcipher_aes_ct_dec_crotr16(uint32_t x) { return (x << 16) | (x >> 16); } static void inv__src_symcipher_aes_ct_dec_cmix_columns(uint32_t *q) { uint32_t q0, q1, q2, q3, q4, q5, q6, q7; uint32_t r0, r1, r2, r3, r4, r5, r6, r7; q0 = q[0]; q1 = q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = q[5]; q6 = q[6]; q7 = q[7]; r0 = (q0 >> 8) | (q0 << 24); r1 = (q1 >> 8) | (q1 << 24); r2 = (q2 >> 8) | (q2 << 24); r3 = (q3 >> 8) | (q3 << 24); r4 = (q4 >> 8) | (q4 << 24); r5 = (q5 >> 8) | (q5 << 24); r6 = (q6 >> 8) | (q6 << 24); r7 = (q7 >> 8) | (q7 << 24); q[0] = q5 ^ q6 ^ q7 ^ r0 ^ r5 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q0 ^ q5 ^ q6 ^ r0 ^ r5); q[1] = q0 ^ q5 ^ r0 ^ r1 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q1 ^ q5 ^ q7 ^ r1 ^ r5 ^ r6); q[2] = q0 ^ q1 ^ q6 ^ r1 ^ r2 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q0 ^ q2 ^ q6 ^ r2 ^ r6 ^ r7); q[3] = q0 ^ q1 ^ q2 ^ q5 ^ q6 ^ r0 ^ r2 ^ r3 ^ r5 ^ _src_symcipher_aes_ct_dec_crotr16(q0 ^ q1 ^ q3 ^ q5 ^ q6 ^ q7 ^ r0 ^ r3 ^ r5 ^ r7); q[4] = q1 ^ q2 ^ q3 ^ q5 ^ r1 ^ r3 ^ r4 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q1 ^ q2 ^ q4 ^ q5 ^ q7 ^ r1 ^ r4 ^ r5 ^ r6); q[5] = q2 ^ q3 ^ q4 ^ q6 ^ r2 ^ r4 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q2 ^ q3 ^ q5 ^ q6 ^ r2 ^ r5 ^ r6 ^ r7); q[6] = q3 ^ q4 ^ q5 ^ q7 ^ r3 ^ r5 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q3 ^ q4 ^ q6 ^ q7 ^ r3 ^ r6 ^ r7); q[7] = q4 ^ q5 ^ q6 ^ r4 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_dec_crotr16(q4 ^ q5 ^ q7 ^ r4 ^ r7); } /* see inner.h */ void br_aes_ct_bitslice_decrypt(unsigned num_rounds, const uint32_t *skey, uint32_t *q) { unsigned u; _src_symcipher_aes_ct_dec_cadd_round_key(q, skey + (num_rounds << 3)); for (u = num_rounds - 1; u > 0; u --) { inv__src_symcipher_aes_ct_dec_cshift_rows(q); br_aes_ct_bitslice_invSbox(q); _src_symcipher_aes_ct_dec_cadd_round_key(q, skey + (u << 3)); inv__src_symcipher_aes_ct_dec_cmix_columns(q); } inv__src_symcipher_aes_ct_dec_cshift_rows(q); br_aes_ct_bitslice_invSbox(q); _src_symcipher_aes_ct_dec_cadd_round_key(q, skey); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ static inline void _src_symcipher_aes_ct_enc_cadd_round_key(uint32_t *q, const uint32_t *sk) { q[0] ^= sk[0]; q[1] ^= sk[1]; q[2] ^= sk[2]; q[3] ^= sk[3]; q[4] ^= sk[4]; q[5] ^= sk[5]; q[6] ^= sk[6]; q[7] ^= sk[7]; } static inline void _src_symcipher_aes_ct_enc_cshift_rows(uint32_t *q) { int i; for (i = 0; i < 8; i ++) { uint32_t x; x = q[i]; q[i] = (x & 0x000000FF) | ((x & 0x0000FC00) >> 2) | ((x & 0x00000300) << 6) | ((x & 0x00F00000) >> 4) | ((x & 0x000F0000) << 4) | ((x & 0xC0000000) >> 6) | ((x & 0x3F000000) << 2); } } static inline uint32_t _src_symcipher_aes_ct_enc_crotr16(uint32_t x) { return (x << 16) | (x >> 16); } static inline void _src_symcipher_aes_ct_enc_cmix_columns(uint32_t *q) { uint32_t q0, q1, q2, q3, q4, q5, q6, q7; uint32_t r0, r1, r2, r3, r4, r5, r6, r7; q0 = q[0]; q1 = q[1]; q2 = q[2]; q3 = q[3]; q4 = q[4]; q5 = q[5]; q6 = q[6]; q7 = q[7]; r0 = (q0 >> 8) | (q0 << 24); r1 = (q1 >> 8) | (q1 << 24); r2 = (q2 >> 8) | (q2 << 24); r3 = (q3 >> 8) | (q3 << 24); r4 = (q4 >> 8) | (q4 << 24); r5 = (q5 >> 8) | (q5 << 24); r6 = (q6 >> 8) | (q6 << 24); r7 = (q7 >> 8) | (q7 << 24); q[0] = q7 ^ r7 ^ r0 ^ _src_symcipher_aes_ct_enc_crotr16(q0 ^ r0); q[1] = q0 ^ r0 ^ q7 ^ r7 ^ r1 ^ _src_symcipher_aes_ct_enc_crotr16(q1 ^ r1); q[2] = q1 ^ r1 ^ r2 ^ _src_symcipher_aes_ct_enc_crotr16(q2 ^ r2); q[3] = q2 ^ r2 ^ q7 ^ r7 ^ r3 ^ _src_symcipher_aes_ct_enc_crotr16(q3 ^ r3); q[4] = q3 ^ r3 ^ q7 ^ r7 ^ r4 ^ _src_symcipher_aes_ct_enc_crotr16(q4 ^ r4); q[5] = q4 ^ r4 ^ r5 ^ _src_symcipher_aes_ct_enc_crotr16(q5 ^ r5); q[6] = q5 ^ r5 ^ r6 ^ _src_symcipher_aes_ct_enc_crotr16(q6 ^ r6); q[7] = q6 ^ r6 ^ r7 ^ _src_symcipher_aes_ct_enc_crotr16(q7 ^ r7); } /* see inner.h */ void br_aes_ct_bitslice_encrypt(unsigned num_rounds, const uint32_t *skey, uint32_t *q) { unsigned u; _src_symcipher_aes_ct_enc_cadd_round_key(q, skey); for (u = 1; u < num_rounds; u ++) { br_aes_ct_bitslice_Sbox(q); _src_symcipher_aes_ct_enc_cshift_rows(q); _src_symcipher_aes_ct_enc_cmix_columns(q); _src_symcipher_aes_ct_enc_cadd_round_key(q, skey + (u << 3)); } br_aes_ct_bitslice_Sbox(q); _src_symcipher_aes_ct_enc_cshift_rows(q); _src_symcipher_aes_ct_enc_cadd_round_key(q, skey + (num_rounds << 3)); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 /* * This code contains the AES key schedule implementation using the * POWER8 opcodes. */ #if BR_POWER8 static void key_schedule_128(unsigned char *sk, const unsigned char *key) { long cc; static const uint32_t fmod[] = { 0x11B, 0x11B, 0x11B, 0x11B }; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; /* * We use the VSX instructions for loading and storing the * key/subkeys, since they support unaligned accesses. The rest * of the computation is VMX only. VMX register 0 is VSX * register 32. */ asm volatile ( /* * v0 = all-zero word * v1 = constant -8 / +8, copied into four words * v2 = current subkey * v3 = Rcon (x4 words) * v6 = constant 8, copied into four words * v7 = constant 0x11B, copied into four words * v8 = constant for _src_symcipher_aes_pwr8_cbyteswapping words */ vspltisw(0, 0) #if BR_POWER8_LE vspltisw(1, -8) #else vspltisw(1, 8) #endif lxvw4x(34, 0, %[key]) vspltisw(3, 1) vspltisw(6, 8) lxvw4x(39, 0, %[fmod]) #if BR_POWER8_LE lxvw4x(40, 0, %[idx2be]) #endif /* * First subkey is a copy of the key itself. */ #if BR_POWER8_LE vperm(4, 2, 2, 8) stxvw4x(36, 0, %[sk]) #else stxvw4x(34, 0, %[sk]) #endif /* * Loop must run 10 times. */ li(%[cc], 10) mtctr(%[cc]) label(loop) /* Increment subkey address */ addi(%[sk], %[sk], 16) /* Compute SubWord(RotWord(temp)) xor Rcon (into v4, splat) */ vrlw(4, 2, 1) vsbox(4, 4) #if BR_POWER8_LE vxor(4, 4, 3) #else vsldoi(5, 3, 0, 3) vxor(4, 4, 5) #endif vspltw(4, 4, 3) /* XOR words for next subkey */ vsldoi(5, 0, 2, 12) vxor(2, 2, 5) vsldoi(5, 0, 2, 12) vxor(2, 2, 5) vsldoi(5, 0, 2, 12) vxor(2, 2, 5) vxor(2, 2, 4) /* Store next subkey */ #if BR_POWER8_LE vperm(4, 2, 2, 8) stxvw4x(36, 0, %[sk]) #else stxvw4x(34, 0, %[sk]) #endif /* Update Rcon */ vadduwm(3, 3, 3) vsrw(4, 3, 6) vsubuwm(4, 0, 4) vand(4, 4, 7) vxor(3, 3, 4) bdnz(loop) : [sk] "+b" (sk), [cc] "+b" (cc) : [key] "b" (key), [fmod] "b" (fmod) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "ctr", "memory" ); } static void key_schedule_192(unsigned char *sk, const unsigned char *key) { long cc; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; /* * We use the VSX instructions for loading and storing the * key/subkeys, since they support unaligned accesses. The rest * of the computation is VMX only. VMX register 0 is VSX * register 32. */ asm volatile ( /* * v0 = all-zero word * v1 = constant -8 / +8, copied into four words * v2, v3 = current subkey * v5 = Rcon (x4 words) (already shifted on big-endian) * v6 = constant 8, copied into four words * v8 = constant for _src_symcipher_aes_pwr8_cbyteswapping words * * The left two words of v3 are ignored. */ vspltisw(0, 0) #if BR_POWER8_LE vspltisw(1, -8) #else vspltisw(1, 8) #endif li(%[cc], 8) lxvw4x(34, 0, %[key]) lxvw4x(35, %[cc], %[key]) vsldoi(3, 3, 0, 8) vspltisw(5, 1) #if !BR_POWER8_LE vsldoi(5, 5, 0, 3) #endif vspltisw(6, 8) #if BR_POWER8_LE lxvw4x(40, 0, %[idx2be]) #endif /* * Loop must run 8 times. Each iteration produces 256 * bits of subkeys, with a 64-bit overlap. */ li(%[cc], 8) mtctr(%[cc]) li(%[cc], 16) label(loop) /* * Last 6 words in v2:v3l. Compute next 6 words into * v3r:v4. */ vrlw(10, 3, 1) vsbox(10, 10) vxor(10, 10, 5) vspltw(10, 10, 1) vsldoi(11, 0, 10, 8) vsldoi(12, 0, 2, 12) vxor(12, 2, 12) vsldoi(13, 0, 12, 12) vxor(12, 12, 13) vsldoi(13, 0, 12, 12) vxor(12, 12, 13) vspltw(13, 12, 3) vxor(13, 13, 3) vsldoi(14, 0, 3, 12) vxor(13, 13, 14) vsldoi(4, 12, 13, 8) vsldoi(14, 0, 3, 8) vsldoi(3, 14, 12, 8) vxor(3, 3, 11) vxor(4, 4, 10) /* * Update Rcon. Since for a 192-bit key, we use only 8 * such constants, we will not hit the field modulus, * so a simple shift (addition) works well. */ vadduwm(5, 5, 5) /* * Write out the two left 128-bit words */ #if BR_POWER8_LE vperm(10, 2, 2, 8) vperm(11, 3, 3, 8) stxvw4x(42, 0, %[sk]) stxvw4x(43, %[cc], %[sk]) #else stxvw4x(34, 0, %[sk]) stxvw4x(35, %[cc], %[sk]) #endif addi(%[sk], %[sk], 24) /* * Shift words for next iteration. */ vsldoi(2, 3, 4, 8) vsldoi(3, 4, 0, 8) bdnz(loop) /* * The loop wrote the first 50 subkey words, but we need * to produce 52, so we must do one last write. */ #if BR_POWER8_LE vperm(10, 2, 2, 8) stxvw4x(42, 0, %[sk]) #else stxvw4x(34, 0, %[sk]) #endif : [sk] "+b" (sk), [cc] "+b" (cc) : [key] "b" (key) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "ctr", "memory" ); } static void key_schedule_256(unsigned char *sk, const unsigned char *key) { long cc; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; /* * We use the VSX instructions for loading and storing the * key/subkeys, since they support unaligned accesses. The rest * of the computation is VMX only. VMX register 0 is VSX * register 32. */ asm volatile ( /* * v0 = all-zero word * v1 = constant -8 / +8, copied into four words * v2, v3 = current subkey * v6 = Rcon (x4 words) (already shifted on big-endian) * v7 = constant 8, copied into four words * v8 = constant for _src_symcipher_aes_pwr8_cbyteswapping words * * The left two words of v3 are ignored. */ vspltisw(0, 0) #if BR_POWER8_LE vspltisw(1, -8) #else vspltisw(1, 8) #endif li(%[cc], 16) lxvw4x(34, 0, %[key]) lxvw4x(35, %[cc], %[key]) vspltisw(6, 1) #if !BR_POWER8_LE vsldoi(6, 6, 0, 3) #endif vspltisw(7, 8) #if BR_POWER8_LE lxvw4x(40, 0, %[idx2be]) #endif /* * Loop must run 7 times. Each iteration produces two * subkeys. */ li(%[cc], 7) mtctr(%[cc]) li(%[cc], 16) label(loop) /* * Current words are in v2:v3. Compute next word in v4. */ vrlw(10, 3, 1) vsbox(10, 10) vxor(10, 10, 6) vspltw(10, 10, 3) vsldoi(4, 0, 2, 12) vxor(4, 2, 4) vsldoi(5, 0, 4, 12) vxor(4, 4, 5) vsldoi(5, 0, 4, 12) vxor(4, 4, 5) vxor(4, 4, 10) /* * Then other word in v5. */ vsbox(10, 4) vspltw(10, 10, 3) vsldoi(5, 0, 3, 12) vxor(5, 3, 5) vsldoi(11, 0, 5, 12) vxor(5, 5, 11) vsldoi(11, 0, 5, 12) vxor(5, 5, 11) vxor(5, 5, 10) /* * Update Rcon. Since for a 256-bit key, we use only 7 * such constants, we will not hit the field modulus, * so a simple shift (addition) works well. */ vadduwm(6, 6, 6) /* * Write out the two left 128-bit words */ #if BR_POWER8_LE vperm(10, 2, 2, 8) vperm(11, 3, 3, 8) stxvw4x(42, 0, %[sk]) stxvw4x(43, %[cc], %[sk]) #else stxvw4x(34, 0, %[sk]) stxvw4x(35, %[cc], %[sk]) #endif addi(%[sk], %[sk], 32) /* * Replace v2:v3 with v4:v5. */ vxor(2, 0, 4) vxor(3, 0, 5) bdnz(loop) /* * The loop wrote the first 14 subkeys, but we need 15, * so we must do an extra write. */ #if BR_POWER8_LE vperm(10, 2, 2, 8) stxvw4x(42, 0, %[sk]) #else stxvw4x(34, 0, %[sk]) #endif : [sk] "+b" (sk), [cc] "+b" (cc) : [key] "b" (key) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "ctr", "memory" ); } /* see inner.h */ int br_aes_pwr8_supported(void) { return 1; } /* see inner.h */ unsigned br_aes_pwr8_keysched(unsigned char *sk, const void *key, size_t len) { switch (len) { case 16: key_schedule_128(sk, key); return 10; case 24: key_schedule_192(sk, key); return 12; default: key_schedule_256(sk, key); return 14; } } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 #if BR_POWER8 /* see bearssl_block.h */ void br_aes_pwr8_cbcdec_init(br_aes_pwr8_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_pwr8_cbcdec_vtable; ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len); } static void cbcdec_128(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v10 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcdec_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v24. */ lxvw4x(56, 0, %[iv]) #if BR_POWER8_LE vperm(24, 24, 24, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next ciphertext words in v16..v19. Also save them * in v20..v23. */ lxvw4x(48, %[cc0], %[buf]) lxvw4x(49, %[cc1], %[buf]) lxvw4x(50, %[cc2], %[buf]) lxvw4x(51, %[cc3], %[buf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif vand(20, 16, 16) vand(21, 17, 17) vand(22, 18, 18) vand(23, 19, 19) /* * Decrypt the blocks. */ vxor(16, 16, 10) vxor(17, 17, 10) vxor(18, 18, 10) vxor(19, 19, 10) vncipher(16, 16, 9) vncipher(17, 17, 9) vncipher(18, 18, 9) vncipher(19, 19, 9) vncipher(16, 16, 8) vncipher(17, 17, 8) vncipher(18, 18, 8) vncipher(19, 19, 8) vncipher(16, 16, 7) vncipher(17, 17, 7) vncipher(18, 18, 7) vncipher(19, 19, 7) vncipher(16, 16, 6) vncipher(17, 17, 6) vncipher(18, 18, 6) vncipher(19, 19, 6) vncipher(16, 16, 5) vncipher(17, 17, 5) vncipher(18, 18, 5) vncipher(19, 19, 5) vncipher(16, 16, 4) vncipher(17, 17, 4) vncipher(18, 18, 4) vncipher(19, 19, 4) vncipher(16, 16, 3) vncipher(17, 17, 3) vncipher(18, 18, 3) vncipher(19, 19, 3) vncipher(16, 16, 2) vncipher(17, 17, 2) vncipher(18, 18, 2) vncipher(19, 19, 2) vncipher(16, 16, 1) vncipher(17, 17, 1) vncipher(18, 18, 1) vncipher(19, 19, 1) vncipherlast(16, 16, 0) vncipherlast(17, 17, 0) vncipherlast(18, 18, 0) vncipherlast(19, 19, 0) /* * XOR decrypted blocks with IV / previous block. */ vxor(16, 16, 24) vxor(17, 17, 20) vxor(18, 18, 21) vxor(19, 19, 22) /* * Store back result (with _src_symcipher_aes_pwr8_cbcdec_cbyteswap) */ #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) /* * Fourth encrypted block is IV for next run. */ vand(24, 23, 23) addi(%[buf], %[buf], 64) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (num_blocks >> 2) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } static void cbcdec_192(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v12 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(43, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(44, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcdec_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v24. */ lxvw4x(56, 0, %[iv]) #if BR_POWER8_LE vperm(24, 24, 24, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next ciphertext words in v16..v19. Also save them * in v20..v23. */ lxvw4x(48, %[cc0], %[buf]) lxvw4x(49, %[cc1], %[buf]) lxvw4x(50, %[cc2], %[buf]) lxvw4x(51, %[cc3], %[buf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif vand(20, 16, 16) vand(21, 17, 17) vand(22, 18, 18) vand(23, 19, 19) /* * Decrypt the blocks. */ vxor(16, 16, 12) vxor(17, 17, 12) vxor(18, 18, 12) vxor(19, 19, 12) vncipher(16, 16, 11) vncipher(17, 17, 11) vncipher(18, 18, 11) vncipher(19, 19, 11) vncipher(16, 16, 10) vncipher(17, 17, 10) vncipher(18, 18, 10) vncipher(19, 19, 10) vncipher(16, 16, 9) vncipher(17, 17, 9) vncipher(18, 18, 9) vncipher(19, 19, 9) vncipher(16, 16, 8) vncipher(17, 17, 8) vncipher(18, 18, 8) vncipher(19, 19, 8) vncipher(16, 16, 7) vncipher(17, 17, 7) vncipher(18, 18, 7) vncipher(19, 19, 7) vncipher(16, 16, 6) vncipher(17, 17, 6) vncipher(18, 18, 6) vncipher(19, 19, 6) vncipher(16, 16, 5) vncipher(17, 17, 5) vncipher(18, 18, 5) vncipher(19, 19, 5) vncipher(16, 16, 4) vncipher(17, 17, 4) vncipher(18, 18, 4) vncipher(19, 19, 4) vncipher(16, 16, 3) vncipher(17, 17, 3) vncipher(18, 18, 3) vncipher(19, 19, 3) vncipher(16, 16, 2) vncipher(17, 17, 2) vncipher(18, 18, 2) vncipher(19, 19, 2) vncipher(16, 16, 1) vncipher(17, 17, 1) vncipher(18, 18, 1) vncipher(19, 19, 1) vncipherlast(16, 16, 0) vncipherlast(17, 17, 0) vncipherlast(18, 18, 0) vncipherlast(19, 19, 0) /* * XOR decrypted blocks with IV / previous block. */ vxor(16, 16, 24) vxor(17, 17, 20) vxor(18, 18, 21) vxor(19, 19, 22) /* * Store back result (with _src_symcipher_aes_pwr8_cbcdec_cbyteswap) */ #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) /* * Fourth encrypted block is IV for next run. */ vand(24, 23, 23) addi(%[buf], %[buf], 64) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (num_blocks >> 2) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } static void cbcdec_256(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v14 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(43, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(44, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(45, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(46, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcdec_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v24. */ lxvw4x(56, 0, %[iv]) #if BR_POWER8_LE vperm(24, 24, 24, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next ciphertext words in v16..v19. Also save them * in v20..v23. */ lxvw4x(48, %[cc0], %[buf]) lxvw4x(49, %[cc1], %[buf]) lxvw4x(50, %[cc2], %[buf]) lxvw4x(51, %[cc3], %[buf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif vand(20, 16, 16) vand(21, 17, 17) vand(22, 18, 18) vand(23, 19, 19) /* * Decrypt the blocks. */ vxor(16, 16, 14) vxor(17, 17, 14) vxor(18, 18, 14) vxor(19, 19, 14) vncipher(16, 16, 13) vncipher(17, 17, 13) vncipher(18, 18, 13) vncipher(19, 19, 13) vncipher(16, 16, 12) vncipher(17, 17, 12) vncipher(18, 18, 12) vncipher(19, 19, 12) vncipher(16, 16, 11) vncipher(17, 17, 11) vncipher(18, 18, 11) vncipher(19, 19, 11) vncipher(16, 16, 10) vncipher(17, 17, 10) vncipher(18, 18, 10) vncipher(19, 19, 10) vncipher(16, 16, 9) vncipher(17, 17, 9) vncipher(18, 18, 9) vncipher(19, 19, 9) vncipher(16, 16, 8) vncipher(17, 17, 8) vncipher(18, 18, 8) vncipher(19, 19, 8) vncipher(16, 16, 7) vncipher(17, 17, 7) vncipher(18, 18, 7) vncipher(19, 19, 7) vncipher(16, 16, 6) vncipher(17, 17, 6) vncipher(18, 18, 6) vncipher(19, 19, 6) vncipher(16, 16, 5) vncipher(17, 17, 5) vncipher(18, 18, 5) vncipher(19, 19, 5) vncipher(16, 16, 4) vncipher(17, 17, 4) vncipher(18, 18, 4) vncipher(19, 19, 4) vncipher(16, 16, 3) vncipher(17, 17, 3) vncipher(18, 18, 3) vncipher(19, 19, 3) vncipher(16, 16, 2) vncipher(17, 17, 2) vncipher(18, 18, 2) vncipher(19, 19, 2) vncipher(16, 16, 1) vncipher(17, 17, 1) vncipher(18, 18, 1) vncipher(19, 19, 1) vncipherlast(16, 16, 0) vncipherlast(17, 17, 0) vncipherlast(18, 18, 0) vncipherlast(19, 19, 0) /* * XOR decrypted blocks with IV / previous block. */ vxor(16, 16, 24) vxor(17, 17, 20) vxor(18, 18, 21) vxor(19, 19, 22) /* * Store back result (with _src_symcipher_aes_pwr8_cbcdec_cbyteswap) */ #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) /* * Fourth encrypted block is IV for next run. */ vand(24, 23, 23) addi(%[buf], %[buf], 64) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (num_blocks >> 2) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } /* see bearssl_block.h */ void br_aes_pwr8_cbcdec_run(const br_aes_pwr8_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char nextiv[16]; unsigned char *buf; if (len == 0) { return; } buf = (unsigned char*)data; memcpy(nextiv, buf + len - 16, 16); if (len >= 64) { size_t num_blocks; unsigned char tmp[16]; num_blocks = (len >> 4) & ~(size_t)3; memcpy(tmp, buf + (num_blocks << 4) - 16, 16); switch (ctx->num_rounds) { case 10: cbcdec_128(ctx->skey.skni, iv, buf, num_blocks); break; case 12: cbcdec_192(ctx->skey.skni, iv, buf, num_blocks); break; default: cbcdec_256(ctx->skey.skni, iv, buf, num_blocks); break; } buf += num_blocks << 4; len &= 63; memcpy(iv, tmp, 16); } if (len > 0) { unsigned char tmp[64]; memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); switch (ctx->num_rounds) { case 10: cbcdec_128(ctx->skey.skni, iv, tmp, 4); break; case 12: cbcdec_192(ctx->skey.skni, iv, tmp, 4); break; default: cbcdec_256(ctx->skey.skni, iv, tmp, 4); break; } memcpy(buf, tmp, len); } memcpy(iv, nextiv, 16); } /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_pwr8_cbcdec_vtable = { sizeof(br_aes_pwr8_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_pwr8_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_pwr8_cbcdec_run }; /* see bearssl_block.h */ const br_block_cbcdec_class * br_aes_pwr8_cbcdec_get_vtable(void) { return br_aes_pwr8_supported() ? &br_aes_pwr8_cbcdec_vtable : NULL; } #else /* see bearssl_block.h */ const br_block_cbcdec_class * br_aes_pwr8_cbcdec_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 #if BR_POWER8 /* see bearssl_block.h */ void br_aes_pwr8_cbcenc_init(br_aes_pwr8_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_pwr8_cbcenc_vtable; ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len); } static void cbcenc_128(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t len) { long cc; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; asm volatile ( /* * Load subkeys into v0..v10 */ lxvw4x(32, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(33, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(34, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(35, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(36, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(37, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(38, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(39, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(40, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(41, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(42, %[cc], %[sk]) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcenc_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v16. */ lxvw4x(48, 0, %[iv]) #if BR_POWER8_LE vperm(16, 16, 16, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next plaintext word and XOR with current IV. */ lxvw4x(49, 0, %[buf]) #if BR_POWER8_LE vperm(17, 17, 17, 15) #endif vxor(16, 16, 17) /* * Encrypt the block. */ vxor(16, 16, 0) vcipher(16, 16, 1) vcipher(16, 16, 2) vcipher(16, 16, 3) vcipher(16, 16, 4) vcipher(16, 16, 5) vcipher(16, 16, 6) vcipher(16, 16, 7) vcipher(16, 16, 8) vcipher(16, 16, 9) vcipherlast(16, 16, 10) /* * Store back result (with _src_symcipher_aes_pwr8_cbcenc_cbyteswap) */ #if BR_POWER8_LE vperm(17, 16, 16, 15) stxvw4x(49, 0, %[buf]) #else stxvw4x(48, 0, %[buf]) #endif addi(%[buf], %[buf], 16) bdnz(loop) : [cc] "+b" (cc), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "ctr", "memory" ); } static void cbcenc_192(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t len) { long cc; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; asm volatile ( /* * Load subkeys into v0..v12 */ lxvw4x(32, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(33, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(34, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(35, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(36, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(37, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(38, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(39, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(40, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(41, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(42, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(43, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(44, %[cc], %[sk]) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcenc_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v16. */ lxvw4x(48, 0, %[iv]) #if BR_POWER8_LE vperm(16, 16, 16, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next plaintext word and XOR with current IV. */ lxvw4x(49, 0, %[buf]) #if BR_POWER8_LE vperm(17, 17, 17, 15) #endif vxor(16, 16, 17) /* * Encrypt the block. */ vxor(16, 16, 0) vcipher(16, 16, 1) vcipher(16, 16, 2) vcipher(16, 16, 3) vcipher(16, 16, 4) vcipher(16, 16, 5) vcipher(16, 16, 6) vcipher(16, 16, 7) vcipher(16, 16, 8) vcipher(16, 16, 9) vcipher(16, 16, 10) vcipher(16, 16, 11) vcipherlast(16, 16, 12) /* * Store back result (with _src_symcipher_aes_pwr8_cbcenc_cbyteswap) */ #if BR_POWER8_LE vperm(17, 16, 16, 15) stxvw4x(49, 0, %[buf]) #else stxvw4x(48, 0, %[buf]) #endif addi(%[buf], %[buf], 16) bdnz(loop) : [cc] "+b" (cc), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "ctr", "memory" ); } static void cbcenc_256(const unsigned char *sk, const unsigned char *iv, unsigned char *buf, size_t len) { long cc; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif cc = 0; asm volatile ( /* * Load subkeys into v0..v14 */ lxvw4x(32, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(33, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(34, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(35, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(36, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(37, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(38, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(39, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(40, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(41, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(42, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(43, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(44, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(45, %[cc], %[sk]) addi(%[cc], %[cc], 16) lxvw4x(46, %[cc], %[sk]) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_cbcenc_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * Load IV into v16. */ lxvw4x(48, 0, %[iv]) #if BR_POWER8_LE vperm(16, 16, 16, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Load next plaintext word and XOR with current IV. */ lxvw4x(49, 0, %[buf]) #if BR_POWER8_LE vperm(17, 17, 17, 15) #endif vxor(16, 16, 17) /* * Encrypt the block. */ vxor(16, 16, 0) vcipher(16, 16, 1) vcipher(16, 16, 2) vcipher(16, 16, 3) vcipher(16, 16, 4) vcipher(16, 16, 5) vcipher(16, 16, 6) vcipher(16, 16, 7) vcipher(16, 16, 8) vcipher(16, 16, 9) vcipher(16, 16, 10) vcipher(16, 16, 11) vcipher(16, 16, 12) vcipher(16, 16, 13) vcipherlast(16, 16, 14) /* * Store back result (with _src_symcipher_aes_pwr8_cbcenc_cbyteswap) */ #if BR_POWER8_LE vperm(17, 16, 16, 15) stxvw4x(49, 0, %[buf]) #else stxvw4x(48, 0, %[buf]) #endif addi(%[buf], %[buf], 16) bdnz(loop) : [cc] "+b" (cc), [buf] "+b" (buf) : [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "ctr", "memory" ); } /* see bearssl_block.h */ void br_aes_pwr8_cbcenc_run(const br_aes_pwr8_cbcenc_keys *ctx, void *iv, void *data, size_t len) { if (len > 0) { switch (ctx->num_rounds) { case 10: cbcenc_128(ctx->skey.skni, iv, data, len); break; case 12: cbcenc_192(ctx->skey.skni, iv, data, len); break; default: cbcenc_256(ctx->skey.skni, iv, data, len); break; } memcpy(iv, (unsigned char *)data + (len - 16), 16); } } /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_pwr8_cbcenc_vtable = { sizeof(br_aes_pwr8_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_pwr8_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_pwr8_cbcenc_run }; /* see bearssl_block.h */ const br_block_cbcenc_class * br_aes_pwr8_cbcenc_get_vtable(void) { return br_aes_pwr8_supported() ? &br_aes_pwr8_cbcenc_vtable : NULL; } #else /* see bearssl_block.h */ const br_block_cbcenc_class * br_aes_pwr8_cbcenc_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 #if BR_POWER8 /* see bearssl_block.h */ void br_aes_pwr8_ctr_init(br_aes_pwr8_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_pwr8_ctr_vtable; ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len); } static void ctr_128(const unsigned char *sk, const unsigned char *ivbuf, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif static const uint32_t ctrinc[] = { 0, 0, 0, 4 }; cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v10 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_ctr_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * v28 = increment for IV counter. */ lxvw4x(60, 0, %[ctrinc]) /* * Load IV into v16..v19 */ lxvw4x(48, %[cc0], %[ivbuf]) lxvw4x(49, %[cc1], %[ivbuf]) lxvw4x(50, %[cc2], %[ivbuf]) lxvw4x(51, %[cc3], %[ivbuf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Compute next IV into v24..v27 */ vadduwm(24, 16, 28) vadduwm(25, 17, 28) vadduwm(26, 18, 28) vadduwm(27, 19, 28) /* * Load next data blocks. We do this early on but we * won't need them until IV encryption is done. */ lxvw4x(52, %[cc0], %[buf]) lxvw4x(53, %[cc1], %[buf]) lxvw4x(54, %[cc2], %[buf]) lxvw4x(55, %[cc3], %[buf]) /* * Encrypt the current IV. */ vxor(16, 16, 0) vxor(17, 17, 0) vxor(18, 18, 0) vxor(19, 19, 0) vcipher(16, 16, 1) vcipher(17, 17, 1) vcipher(18, 18, 1) vcipher(19, 19, 1) vcipher(16, 16, 2) vcipher(17, 17, 2) vcipher(18, 18, 2) vcipher(19, 19, 2) vcipher(16, 16, 3) vcipher(17, 17, 3) vcipher(18, 18, 3) vcipher(19, 19, 3) vcipher(16, 16, 4) vcipher(17, 17, 4) vcipher(18, 18, 4) vcipher(19, 19, 4) vcipher(16, 16, 5) vcipher(17, 17, 5) vcipher(18, 18, 5) vcipher(19, 19, 5) vcipher(16, 16, 6) vcipher(17, 17, 6) vcipher(18, 18, 6) vcipher(19, 19, 6) vcipher(16, 16, 7) vcipher(17, 17, 7) vcipher(18, 18, 7) vcipher(19, 19, 7) vcipher(16, 16, 8) vcipher(17, 17, 8) vcipher(18, 18, 8) vcipher(19, 19, 8) vcipher(16, 16, 9) vcipher(17, 17, 9) vcipher(18, 18, 9) vcipher(19, 19, 9) vcipherlast(16, 16, 10) vcipherlast(17, 17, 10) vcipherlast(18, 18, 10) vcipherlast(19, 19, 10) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif /* * Load next plaintext word and XOR with encrypted IV. */ vxor(16, 20, 16) vxor(17, 21, 17) vxor(18, 22, 18) vxor(19, 23, 19) stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) addi(%[buf], %[buf], 64) /* * Update IV. */ vand(16, 24, 24) vand(17, 25, 25) vand(18, 26, 26) vand(19, 27, 27) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2), [ctrinc] "b" (ctrinc) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } static void ctr_192(const unsigned char *sk, const unsigned char *ivbuf, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif static const uint32_t ctrinc[] = { 0, 0, 0, 4 }; cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v12 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(43, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(44, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_ctr_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * v28 = increment for IV counter. */ lxvw4x(60, 0, %[ctrinc]) /* * Load IV into v16..v19 */ lxvw4x(48, %[cc0], %[ivbuf]) lxvw4x(49, %[cc1], %[ivbuf]) lxvw4x(50, %[cc2], %[ivbuf]) lxvw4x(51, %[cc3], %[ivbuf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Compute next IV into v24..v27 */ vadduwm(24, 16, 28) vadduwm(25, 17, 28) vadduwm(26, 18, 28) vadduwm(27, 19, 28) /* * Load next data blocks. We do this early on but we * won't need them until IV encryption is done. */ lxvw4x(52, %[cc0], %[buf]) lxvw4x(53, %[cc1], %[buf]) lxvw4x(54, %[cc2], %[buf]) lxvw4x(55, %[cc3], %[buf]) /* * Encrypt the current IV. */ vxor(16, 16, 0) vxor(17, 17, 0) vxor(18, 18, 0) vxor(19, 19, 0) vcipher(16, 16, 1) vcipher(17, 17, 1) vcipher(18, 18, 1) vcipher(19, 19, 1) vcipher(16, 16, 2) vcipher(17, 17, 2) vcipher(18, 18, 2) vcipher(19, 19, 2) vcipher(16, 16, 3) vcipher(17, 17, 3) vcipher(18, 18, 3) vcipher(19, 19, 3) vcipher(16, 16, 4) vcipher(17, 17, 4) vcipher(18, 18, 4) vcipher(19, 19, 4) vcipher(16, 16, 5) vcipher(17, 17, 5) vcipher(18, 18, 5) vcipher(19, 19, 5) vcipher(16, 16, 6) vcipher(17, 17, 6) vcipher(18, 18, 6) vcipher(19, 19, 6) vcipher(16, 16, 7) vcipher(17, 17, 7) vcipher(18, 18, 7) vcipher(19, 19, 7) vcipher(16, 16, 8) vcipher(17, 17, 8) vcipher(18, 18, 8) vcipher(19, 19, 8) vcipher(16, 16, 9) vcipher(17, 17, 9) vcipher(18, 18, 9) vcipher(19, 19, 9) vcipher(16, 16, 10) vcipher(17, 17, 10) vcipher(18, 18, 10) vcipher(19, 19, 10) vcipher(16, 16, 11) vcipher(17, 17, 11) vcipher(18, 18, 11) vcipher(19, 19, 11) vcipherlast(16, 16, 12) vcipherlast(17, 17, 12) vcipherlast(18, 18, 12) vcipherlast(19, 19, 12) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif /* * Load next plaintext word and XOR with encrypted IV. */ vxor(16, 20, 16) vxor(17, 21, 17) vxor(18, 22, 18) vxor(19, 23, 19) stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) addi(%[buf], %[buf], 64) /* * Update IV. */ vand(16, 24, 24) vand(17, 25, 25) vand(18, 26, 26) vand(19, 27, 27) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2), [ctrinc] "b" (ctrinc) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } static void ctr_256(const unsigned char *sk, const unsigned char *ivbuf, unsigned char *buf, size_t num_blocks) { long cc0, cc1, cc2, cc3; #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #endif static const uint32_t ctrinc[] = { 0, 0, 0, 4 }; cc0 = 0; cc1 = 16; cc2 = 32; cc3 = 48; asm volatile ( /* * Load subkeys into v0..v14 */ lxvw4x(32, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(33, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(34, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(35, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(36, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(37, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(38, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(39, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(40, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(41, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(42, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(43, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(44, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(45, %[cc0], %[sk]) addi(%[cc0], %[cc0], 16) lxvw4x(46, %[cc0], %[sk]) li(%[cc0], 0) #if BR_POWER8_LE /* * v15 = constant for _src_symcipher_aes_pwr8_ctr_cbyteswapping words */ lxvw4x(47, 0, %[idx2be]) #endif /* * v28 = increment for IV counter. */ lxvw4x(60, 0, %[ctrinc]) /* * Load IV into v16..v19 */ lxvw4x(48, %[cc0], %[ivbuf]) lxvw4x(49, %[cc1], %[ivbuf]) lxvw4x(50, %[cc2], %[ivbuf]) lxvw4x(51, %[cc3], %[ivbuf]) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif mtctr(%[num_blocks]) label(loop) /* * Compute next IV into v24..v27 */ vadduwm(24, 16, 28) vadduwm(25, 17, 28) vadduwm(26, 18, 28) vadduwm(27, 19, 28) /* * Load next data blocks. We do this early on but we * won't need them until IV encryption is done. */ lxvw4x(52, %[cc0], %[buf]) lxvw4x(53, %[cc1], %[buf]) lxvw4x(54, %[cc2], %[buf]) lxvw4x(55, %[cc3], %[buf]) /* * Encrypt the current IV. */ vxor(16, 16, 0) vxor(17, 17, 0) vxor(18, 18, 0) vxor(19, 19, 0) vcipher(16, 16, 1) vcipher(17, 17, 1) vcipher(18, 18, 1) vcipher(19, 19, 1) vcipher(16, 16, 2) vcipher(17, 17, 2) vcipher(18, 18, 2) vcipher(19, 19, 2) vcipher(16, 16, 3) vcipher(17, 17, 3) vcipher(18, 18, 3) vcipher(19, 19, 3) vcipher(16, 16, 4) vcipher(17, 17, 4) vcipher(18, 18, 4) vcipher(19, 19, 4) vcipher(16, 16, 5) vcipher(17, 17, 5) vcipher(18, 18, 5) vcipher(19, 19, 5) vcipher(16, 16, 6) vcipher(17, 17, 6) vcipher(18, 18, 6) vcipher(19, 19, 6) vcipher(16, 16, 7) vcipher(17, 17, 7) vcipher(18, 18, 7) vcipher(19, 19, 7) vcipher(16, 16, 8) vcipher(17, 17, 8) vcipher(18, 18, 8) vcipher(19, 19, 8) vcipher(16, 16, 9) vcipher(17, 17, 9) vcipher(18, 18, 9) vcipher(19, 19, 9) vcipher(16, 16, 10) vcipher(17, 17, 10) vcipher(18, 18, 10) vcipher(19, 19, 10) vcipher(16, 16, 11) vcipher(17, 17, 11) vcipher(18, 18, 11) vcipher(19, 19, 11) vcipher(16, 16, 12) vcipher(17, 17, 12) vcipher(18, 18, 12) vcipher(19, 19, 12) vcipher(16, 16, 13) vcipher(17, 17, 13) vcipher(18, 18, 13) vcipher(19, 19, 13) vcipherlast(16, 16, 14) vcipherlast(17, 17, 14) vcipherlast(18, 18, 14) vcipherlast(19, 19, 14) #if BR_POWER8_LE vperm(16, 16, 16, 15) vperm(17, 17, 17, 15) vperm(18, 18, 18, 15) vperm(19, 19, 19, 15) #endif /* * Load next plaintext word and XOR with encrypted IV. */ vxor(16, 20, 16) vxor(17, 21, 17) vxor(18, 22, 18) vxor(19, 23, 19) stxvw4x(48, %[cc0], %[buf]) stxvw4x(49, %[cc1], %[buf]) stxvw4x(50, %[cc2], %[buf]) stxvw4x(51, %[cc3], %[buf]) addi(%[buf], %[buf], 64) /* * Update IV. */ vand(16, 24, 24) vand(17, 25, 25) vand(18, 26, 26) vand(19, 27, 27) bdnz(loop) : [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3), [buf] "+b" (buf) : [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2), [ctrinc] "b" (ctrinc) #if BR_POWER8_LE , [idx2be] "b" (idx2be) #endif : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "ctr", "memory" ); } /* see bearssl_block.h */ uint32_t br_aes_pwr8_ctr_run(const br_aes_pwr8_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; unsigned char ivbuf[64]; buf = (unsigned char*)data; memcpy(ivbuf + 0, iv, 12); memcpy(ivbuf + 16, iv, 12); memcpy(ivbuf + 32, iv, 12); memcpy(ivbuf + 48, iv, 12); if (len >= 64) { br_enc32be(ivbuf + 12, cc + 0); br_enc32be(ivbuf + 28, cc + 1); br_enc32be(ivbuf + 44, cc + 2); br_enc32be(ivbuf + 60, cc + 3); switch (ctx->num_rounds) { case 10: ctr_128(ctx->skey.skni, ivbuf, buf, (len >> 4) & ~(size_t)3); break; case 12: ctr_192(ctx->skey.skni, ivbuf, buf, (len >> 4) & ~(size_t)3); break; default: ctr_256(ctx->skey.skni, ivbuf, buf, (len >> 4) & ~(size_t)3); break; } cc += (len >> 4) & ~(size_t)3; buf += len & ~(size_t)63; len &= 63; } if (len > 0) { unsigned char tmp[64]; memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); br_enc32be(ivbuf + 12, cc + 0); br_enc32be(ivbuf + 28, cc + 1); br_enc32be(ivbuf + 44, cc + 2); br_enc32be(ivbuf + 60, cc + 3); switch (ctx->num_rounds) { case 10: ctr_128(ctx->skey.skni, ivbuf, tmp, 4); break; case 12: ctr_192(ctx->skey.skni, ivbuf, tmp, 4); break; default: ctr_256(ctx->skey.skni, ivbuf, tmp, 4); break; } memcpy(buf, tmp, len); cc += (len + 15) >> 4; } return cc; } /* see bearssl_block.h */ const br_block_ctr_class br_aes_pwr8_ctr_vtable = { sizeof(br_aes_pwr8_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_pwr8_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_pwr8_ctr_run }; /* see bearssl_block.h */ const br_block_ctr_class * br_aes_pwr8_ctr_get_vtable(void) { return br_aes_pwr8_supported() ? &br_aes_pwr8_ctr_vtable : NULL; } #else /* see bearssl_block.h */ const br_block_ctr_class * br_aes_pwr8_ctr_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_POWER_ASM_MACROS 1 #if BR_POWER8 /* see bearssl_block.h */ const br_block_ctrcbc_class * br_aes_pwr8_ctrcbc_get_vtable(void) { return br_aes_pwr8_supported() ? &br_aes_pwr8_ctrcbc_vtable : NULL; } /* see bearssl_block.h */ void br_aes_pwr8_ctrcbc_init(br_aes_pwr8_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_pwr8_ctrcbc_vtable; ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len); } /* * Register conventions for CTR + CBC-MAC: * * AES subkeys are in registers 0 to 10/12/14 (depending on keys size) * Register v15 contains the _src_symcipher_aes_pwr8_ctrcbc_cbyteswap index register (little-endian only) * Register v16 contains the CTR counter value * Register v17 contains the CBC-MAC current value * Registers v18 to v27 are scratch * Counter increment uses v28, v29 and v30 * * For CTR alone: * * AES subkeys are in registers 0 to 10/12/14 (depending on keys size) * Register v15 contains the _src_symcipher_aes_pwr8_ctrcbc_cbyteswap index register (little-endian only) * Registers v16 to v19 contain the CTR counter values (four blocks) * Registers v20 to v27 are scratch * Counter increment uses v28, v29 and v30 */ #define LOAD_SUBKEYS_128 \ lxvw4x(32, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(33, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(34, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(35, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(36, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(37, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(38, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(39, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(40, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(41, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(42, %[cc], %[sk]) #define LOAD_SUBKEYS_192 \ LOAD_SUBKEYS_128 \ addi(%[cc], %[cc], 16) \ lxvw4x(43, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(44, %[cc], %[sk]) #define LOAD_SUBKEYS_256 \ LOAD_SUBKEYS_192 \ addi(%[cc], %[cc], 16) \ lxvw4x(45, %[cc], %[sk]) \ addi(%[cc], %[cc], 16) \ lxvw4x(46, %[cc], %[sk]) #define BLOCK_ENCRYPT_128(x) \ vxor(x, x, 0) \ vcipher(x, x, 1) \ vcipher(x, x, 2) \ vcipher(x, x, 3) \ vcipher(x, x, 4) \ vcipher(x, x, 5) \ vcipher(x, x, 6) \ vcipher(x, x, 7) \ vcipher(x, x, 8) \ vcipher(x, x, 9) \ vcipherlast(x, x, 10) #define BLOCK_ENCRYPT_192(x) \ vxor(x, x, 0) \ vcipher(x, x, 1) \ vcipher(x, x, 2) \ vcipher(x, x, 3) \ vcipher(x, x, 4) \ vcipher(x, x, 5) \ vcipher(x, x, 6) \ vcipher(x, x, 7) \ vcipher(x, x, 8) \ vcipher(x, x, 9) \ vcipher(x, x, 10) \ vcipher(x, x, 11) \ vcipherlast(x, x, 12) #define BLOCK_ENCRYPT_256(x) \ vxor(x, x, 0) \ vcipher(x, x, 1) \ vcipher(x, x, 2) \ vcipher(x, x, 3) \ vcipher(x, x, 4) \ vcipher(x, x, 5) \ vcipher(x, x, 6) \ vcipher(x, x, 7) \ vcipher(x, x, 8) \ vcipher(x, x, 9) \ vcipher(x, x, 10) \ vcipher(x, x, 11) \ vcipher(x, x, 12) \ vcipher(x, x, 13) \ vcipherlast(x, x, 14) #define BLOCK_ENCRYPT_X2_128(x, y) \ vxor(x, x, 0) \ vxor(y, y, 0) \ vcipher(x, x, 1) \ vcipher(y, y, 1) \ vcipher(x, x, 2) \ vcipher(y, y, 2) \ vcipher(x, x, 3) \ vcipher(y, y, 3) \ vcipher(x, x, 4) \ vcipher(y, y, 4) \ vcipher(x, x, 5) \ vcipher(y, y, 5) \ vcipher(x, x, 6) \ vcipher(y, y, 6) \ vcipher(x, x, 7) \ vcipher(y, y, 7) \ vcipher(x, x, 8) \ vcipher(y, y, 8) \ vcipher(x, x, 9) \ vcipher(y, y, 9) \ vcipherlast(x, x, 10) \ vcipherlast(y, y, 10) #define BLOCK_ENCRYPT_X2_192(x, y) \ vxor(x, x, 0) \ vxor(y, y, 0) \ vcipher(x, x, 1) \ vcipher(y, y, 1) \ vcipher(x, x, 2) \ vcipher(y, y, 2) \ vcipher(x, x, 3) \ vcipher(y, y, 3) \ vcipher(x, x, 4) \ vcipher(y, y, 4) \ vcipher(x, x, 5) \ vcipher(y, y, 5) \ vcipher(x, x, 6) \ vcipher(y, y, 6) \ vcipher(x, x, 7) \ vcipher(y, y, 7) \ vcipher(x, x, 8) \ vcipher(y, y, 8) \ vcipher(x, x, 9) \ vcipher(y, y, 9) \ vcipher(x, x, 10) \ vcipher(y, y, 10) \ vcipher(x, x, 11) \ vcipher(y, y, 11) \ vcipherlast(x, x, 12) \ vcipherlast(y, y, 12) #define BLOCK_ENCRYPT_X2_256(x, y) \ vxor(x, x, 0) \ vxor(y, y, 0) \ vcipher(x, x, 1) \ vcipher(y, y, 1) \ vcipher(x, x, 2) \ vcipher(y, y, 2) \ vcipher(x, x, 3) \ vcipher(y, y, 3) \ vcipher(x, x, 4) \ vcipher(y, y, 4) \ vcipher(x, x, 5) \ vcipher(y, y, 5) \ vcipher(x, x, 6) \ vcipher(y, y, 6) \ vcipher(x, x, 7) \ vcipher(y, y, 7) \ vcipher(x, x, 8) \ vcipher(y, y, 8) \ vcipher(x, x, 9) \ vcipher(y, y, 9) \ vcipher(x, x, 10) \ vcipher(y, y, 10) \ vcipher(x, x, 11) \ vcipher(y, y, 11) \ vcipher(x, x, 12) \ vcipher(y, y, 12) \ vcipher(x, x, 13) \ vcipher(y, y, 13) \ vcipherlast(x, x, 14) \ vcipherlast(y, y, 14) #define BLOCK_ENCRYPT_X4_128(x0, x1, x2, x3) \ vxor(x0, x0, 0) \ vxor(x1, x1, 0) \ vxor(x2, x2, 0) \ vxor(x3, x3, 0) \ vcipher(x0, x0, 1) \ vcipher(x1, x1, 1) \ vcipher(x2, x2, 1) \ vcipher(x3, x3, 1) \ vcipher(x0, x0, 2) \ vcipher(x1, x1, 2) \ vcipher(x2, x2, 2) \ vcipher(x3, x3, 2) \ vcipher(x0, x0, 3) \ vcipher(x1, x1, 3) \ vcipher(x2, x2, 3) \ vcipher(x3, x3, 3) \ vcipher(x0, x0, 4) \ vcipher(x1, x1, 4) \ vcipher(x2, x2, 4) \ vcipher(x3, x3, 4) \ vcipher(x0, x0, 5) \ vcipher(x1, x1, 5) \ vcipher(x2, x2, 5) \ vcipher(x3, x3, 5) \ vcipher(x0, x0, 6) \ vcipher(x1, x1, 6) \ vcipher(x2, x2, 6) \ vcipher(x3, x3, 6) \ vcipher(x0, x0, 7) \ vcipher(x1, x1, 7) \ vcipher(x2, x2, 7) \ vcipher(x3, x3, 7) \ vcipher(x0, x0, 8) \ vcipher(x1, x1, 8) \ vcipher(x2, x2, 8) \ vcipher(x3, x3, 8) \ vcipher(x0, x0, 9) \ vcipher(x1, x1, 9) \ vcipher(x2, x2, 9) \ vcipher(x3, x3, 9) \ vcipherlast(x0, x0, 10) \ vcipherlast(x1, x1, 10) \ vcipherlast(x2, x2, 10) \ vcipherlast(x3, x3, 10) #define BLOCK_ENCRYPT_X4_192(x0, x1, x2, x3) \ vxor(x0, x0, 0) \ vxor(x1, x1, 0) \ vxor(x2, x2, 0) \ vxor(x3, x3, 0) \ vcipher(x0, x0, 1) \ vcipher(x1, x1, 1) \ vcipher(x2, x2, 1) \ vcipher(x3, x3, 1) \ vcipher(x0, x0, 2) \ vcipher(x1, x1, 2) \ vcipher(x2, x2, 2) \ vcipher(x3, x3, 2) \ vcipher(x0, x0, 3) \ vcipher(x1, x1, 3) \ vcipher(x2, x2, 3) \ vcipher(x3, x3, 3) \ vcipher(x0, x0, 4) \ vcipher(x1, x1, 4) \ vcipher(x2, x2, 4) \ vcipher(x3, x3, 4) \ vcipher(x0, x0, 5) \ vcipher(x1, x1, 5) \ vcipher(x2, x2, 5) \ vcipher(x3, x3, 5) \ vcipher(x0, x0, 6) \ vcipher(x1, x1, 6) \ vcipher(x2, x2, 6) \ vcipher(x3, x3, 6) \ vcipher(x0, x0, 7) \ vcipher(x1, x1, 7) \ vcipher(x2, x2, 7) \ vcipher(x3, x3, 7) \ vcipher(x0, x0, 8) \ vcipher(x1, x1, 8) \ vcipher(x2, x2, 8) \ vcipher(x3, x3, 8) \ vcipher(x0, x0, 9) \ vcipher(x1, x1, 9) \ vcipher(x2, x2, 9) \ vcipher(x3, x3, 9) \ vcipher(x0, x0, 10) \ vcipher(x1, x1, 10) \ vcipher(x2, x2, 10) \ vcipher(x3, x3, 10) \ vcipher(x0, x0, 11) \ vcipher(x1, x1, 11) \ vcipher(x2, x2, 11) \ vcipher(x3, x3, 11) \ vcipherlast(x0, x0, 12) \ vcipherlast(x1, x1, 12) \ vcipherlast(x2, x2, 12) \ vcipherlast(x3, x3, 12) #define BLOCK_ENCRYPT_X4_256(x0, x1, x2, x3) \ vxor(x0, x0, 0) \ vxor(x1, x1, 0) \ vxor(x2, x2, 0) \ vxor(x3, x3, 0) \ vcipher(x0, x0, 1) \ vcipher(x1, x1, 1) \ vcipher(x2, x2, 1) \ vcipher(x3, x3, 1) \ vcipher(x0, x0, 2) \ vcipher(x1, x1, 2) \ vcipher(x2, x2, 2) \ vcipher(x3, x3, 2) \ vcipher(x0, x0, 3) \ vcipher(x1, x1, 3) \ vcipher(x2, x2, 3) \ vcipher(x3, x3, 3) \ vcipher(x0, x0, 4) \ vcipher(x1, x1, 4) \ vcipher(x2, x2, 4) \ vcipher(x3, x3, 4) \ vcipher(x0, x0, 5) \ vcipher(x1, x1, 5) \ vcipher(x2, x2, 5) \ vcipher(x3, x3, 5) \ vcipher(x0, x0, 6) \ vcipher(x1, x1, 6) \ vcipher(x2, x2, 6) \ vcipher(x3, x3, 6) \ vcipher(x0, x0, 7) \ vcipher(x1, x1, 7) \ vcipher(x2, x2, 7) \ vcipher(x3, x3, 7) \ vcipher(x0, x0, 8) \ vcipher(x1, x1, 8) \ vcipher(x2, x2, 8) \ vcipher(x3, x3, 8) \ vcipher(x0, x0, 9) \ vcipher(x1, x1, 9) \ vcipher(x2, x2, 9) \ vcipher(x3, x3, 9) \ vcipher(x0, x0, 10) \ vcipher(x1, x1, 10) \ vcipher(x2, x2, 10) \ vcipher(x3, x3, 10) \ vcipher(x0, x0, 11) \ vcipher(x1, x1, 11) \ vcipher(x2, x2, 11) \ vcipher(x3, x3, 11) \ vcipher(x0, x0, 12) \ vcipher(x1, x1, 12) \ vcipher(x2, x2, 12) \ vcipher(x3, x3, 12) \ vcipher(x0, x0, 13) \ vcipher(x1, x1, 13) \ vcipher(x2, x2, 13) \ vcipher(x3, x3, 13) \ vcipherlast(x0, x0, 14) \ vcipherlast(x1, x1, 14) \ vcipherlast(x2, x2, 14) \ vcipherlast(x3, x3, 14) #if BR_POWER8_LE static const uint32_t idx2be[] = { 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C }; #define BYTESWAP_INIT lxvw4x(47, 0, %[idx2be]) #define BYTESWAP(x) vperm(x, x, x, 15) #define BYTESWAPX(d, s) vperm(d, s, s, 15) #define BYTESWAP_REG , [idx2be] "b" (idx2be) #else #define BYTESWAP_INIT #define BYTESWAP(x) #define BYTESWAPX(d, s) vand(d, s, s) #define BYTESWAP_REG #endif static const uint32_t ctrinc[] = { 0, 0, 0, 1 }; static const uint32_t ctrinc_x4[] = { 0, 0, 0, 4 }; #define INCR_128_INIT lxvw4x(60, 0, %[ctrinc]) #define INCR_128_X4_INIT lxvw4x(60, 0, %[ctrinc_x4]) #define INCR_128(d, s) \ vaddcuw(29, s, 28) \ vadduwm(d, s, 28) \ vsldoi(30, 29, 29, 4) \ vaddcuw(29, d, 30) \ vadduwm(d, d, 30) \ vsldoi(30, 29, 29, 4) \ vaddcuw(29, d, 30) \ vadduwm(d, d, 30) \ vsldoi(30, 29, 29, 4) \ vadduwm(d, d, 30) #define MKCTR(size) \ static void \ ctr_ ## size(const unsigned char *sk, \ unsigned char *ctrbuf, unsigned char *buf, size_t num_blocks_x4) \ { \ long cc, cc0, cc1, cc2, cc3; \ \ cc = 0; \ cc0 = 0; \ cc1 = 16; \ cc2 = 32; \ cc3 = 48; \ asm volatile ( \ \ /* \ * Load subkeys into v0..v10 \ */ \ LOAD_SUBKEYS_ ## size \ li(%[cc], 0) \ \ BYTESWAP_INIT \ INCR_128_X4_INIT \ \ /* \ * Load current CTR counters into v16 to v19. \ */ \ lxvw4x(48, %[cc0], %[ctrbuf]) \ lxvw4x(49, %[cc1], %[ctrbuf]) \ lxvw4x(50, %[cc2], %[ctrbuf]) \ lxvw4x(51, %[cc3], %[ctrbuf]) \ BYTESWAP(16) \ BYTESWAP(17) \ BYTESWAP(18) \ BYTESWAP(19) \ \ mtctr(%[num_blocks_x4]) \ \ label(loop) \ /* \ * Compute next counter values into v20..v23. \ */ \ INCR_128(20, 16) \ INCR_128(21, 17) \ INCR_128(22, 18) \ INCR_128(23, 19) \ \ /* \ * Encrypt counter values and XOR into next data blocks. \ */ \ lxvw4x(56, %[cc0], %[buf]) \ lxvw4x(57, %[cc1], %[buf]) \ lxvw4x(58, %[cc2], %[buf]) \ lxvw4x(59, %[cc3], %[buf]) \ BYTESWAP(24) \ BYTESWAP(25) \ BYTESWAP(26) \ BYTESWAP(27) \ BLOCK_ENCRYPT_X4_ ## size(16, 17, 18, 19) \ vxor(16, 16, 24) \ vxor(17, 17, 25) \ vxor(18, 18, 26) \ vxor(19, 19, 27) \ BYTESWAP(16) \ BYTESWAP(17) \ BYTESWAP(18) \ BYTESWAP(19) \ stxvw4x(48, %[cc0], %[buf]) \ stxvw4x(49, %[cc1], %[buf]) \ stxvw4x(50, %[cc2], %[buf]) \ stxvw4x(51, %[cc3], %[buf]) \ \ /* \ * Update counters and data pointer. \ */ \ vand(16, 20, 20) \ vand(17, 21, 21) \ vand(18, 22, 22) \ vand(19, 23, 23) \ addi(%[buf], %[buf], 64) \ \ bdnz(loop) \ \ /* \ * Write back new counter values. \ */ \ BYTESWAP(16) \ BYTESWAP(17) \ BYTESWAP(18) \ BYTESWAP(19) \ stxvw4x(48, %[cc0], %[ctrbuf]) \ stxvw4x(49, %[cc1], %[ctrbuf]) \ stxvw4x(50, %[cc2], %[ctrbuf]) \ stxvw4x(51, %[cc3], %[ctrbuf]) \ \ : [cc] "+b" (cc), [buf] "+b" (buf), \ [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3) \ : [sk] "b" (sk), [ctrbuf] "b" (ctrbuf), \ [num_blocks_x4] "b" (num_blocks_x4), [ctrinc_x4] "b" (ctrinc_x4) \ BYTESWAP_REG \ : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", \ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", \ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", \ "v30", "ctr", "memory" \ ); \ } MKCTR(128) MKCTR(192) MKCTR(256) #define MKCBCMAC(size) \ static void \ cbcmac_ ## size(const unsigned char *sk, \ unsigned char *cbcmac, const unsigned char *buf, size_t num_blocks) \ { \ long cc; \ \ cc = 0; \ asm volatile ( \ \ /* \ * Load subkeys into v0..v10 \ */ \ LOAD_SUBKEYS_ ## size \ li(%[cc], 0) \ \ BYTESWAP_INIT \ \ /* \ * Load current CBC-MAC value into v16. \ */ \ lxvw4x(48, %[cc], %[cbcmac]) \ BYTESWAP(16) \ \ mtctr(%[num_blocks]) \ \ label(loop) \ /* \ * Load next block, XOR into current CBC-MAC value, \ * and then encrypt it. \ */ \ lxvw4x(49, %[cc], %[buf]) \ BYTESWAP(17) \ vxor(16, 16, 17) \ BLOCK_ENCRYPT_ ## size(16) \ addi(%[buf], %[buf], 16) \ \ bdnz(loop) \ \ /* \ * Write back new CBC-MAC value. \ */ \ BYTESWAP(16) \ stxvw4x(48, %[cc], %[cbcmac]) \ \ : [cc] "+b" (cc), [buf] "+b" (buf) \ : [sk] "b" (sk), [cbcmac] "b" (cbcmac), [num_blocks] "b" (num_blocks) \ BYTESWAP_REG \ : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", \ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", \ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", \ "v30", "ctr", "memory" \ ); \ } MKCBCMAC(128) MKCBCMAC(192) MKCBCMAC(256) #define MKENCRYPT(size) \ static void \ ctrcbc_ ## size ## _encrypt(const unsigned char *sk, \ unsigned char *ctr, unsigned char *cbcmac, unsigned char *buf, \ size_t num_blocks) \ { \ long cc; \ \ cc = 0; \ asm volatile ( \ \ /* \ * Load subkeys into v0..v10 \ */ \ LOAD_SUBKEYS_ ## size \ li(%[cc], 0) \ \ BYTESWAP_INIT \ INCR_128_INIT \ \ /* \ * Load current CTR counter into v16, and current \ * CBC-MAC IV into v17. \ */ \ lxvw4x(48, %[cc], %[ctr]) \ lxvw4x(49, %[cc], %[cbcmac]) \ BYTESWAP(16) \ BYTESWAP(17) \ \ /* \ * At each iteration, we do two parallel encryption: \ * - new counter value for encryption of the next block; \ * - CBC-MAC over the previous encrypted block. \ * Thus, each plaintext block implies two AES instances, \ * over two successive iterations. This requires a single \ * counter encryption before the loop, and a single \ * CBC-MAC encryption after the loop. \ */ \ \ /* \ * Encrypt first block (into v20). \ */ \ lxvw4x(52, %[cc], %[buf]) \ BYTESWAP(20) \ INCR_128(22, 16) \ BLOCK_ENCRYPT_ ## size(16) \ vxor(20, 20, 16) \ BYTESWAPX(21, 20) \ stxvw4x(53, %[cc], %[buf]) \ vand(16, 22, 22) \ addi(%[buf], %[buf], 16) \ \ /* \ * Load loop counter; skip the loop if there is only \ * one block in total (already handled by the boundary \ * conditions). \ */ \ mtctr(%[num_blocks]) \ bdz(fastexit) \ \ label(loop) \ /* \ * Upon loop entry: \ * v16 counter value for next block \ * v17 current CBC-MAC value \ * v20 encrypted previous block \ */ \ vxor(17, 17, 20) \ INCR_128(22, 16) \ lxvw4x(52, %[cc], %[buf]) \ BYTESWAP(20) \ BLOCK_ENCRYPT_X2_ ## size(16, 17) \ vxor(20, 20, 16) \ BYTESWAPX(21, 20) \ stxvw4x(53, %[cc], %[buf]) \ addi(%[buf], %[buf], 16) \ vand(16, 22, 22) \ \ bdnz(loop) \ \ label(fastexit) \ vxor(17, 17, 20) \ BLOCK_ENCRYPT_ ## size(17) \ BYTESWAP(16) \ BYTESWAP(17) \ stxvw4x(48, %[cc], %[ctr]) \ stxvw4x(49, %[cc], %[cbcmac]) \ \ : [cc] "+b" (cc), [buf] "+b" (buf) \ : [sk] "b" (sk), [ctr] "b" (ctr), [cbcmac] "b" (cbcmac), \ [num_blocks] "b" (num_blocks), [ctrinc] "b" (ctrinc) \ BYTESWAP_REG \ : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", \ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", \ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", \ "v30", "ctr", "memory" \ ); \ } MKENCRYPT(128) MKENCRYPT(192) MKENCRYPT(256) #define MKDECRYPT(size) \ static void \ ctrcbc_ ## size ## _decrypt(const unsigned char *sk, \ unsigned char *ctr, unsigned char *cbcmac, unsigned char *buf, \ size_t num_blocks) \ { \ long cc; \ \ cc = 0; \ asm volatile ( \ \ /* \ * Load subkeys into v0..v10 \ */ \ LOAD_SUBKEYS_ ## size \ li(%[cc], 0) \ \ BYTESWAP_INIT \ INCR_128_INIT \ \ /* \ * Load current CTR counter into v16, and current \ * CBC-MAC IV into v17. \ */ \ lxvw4x(48, %[cc], %[ctr]) \ lxvw4x(49, %[cc], %[cbcmac]) \ BYTESWAP(16) \ BYTESWAP(17) \ \ /* \ * At each iteration, we do two parallel encryption: \ * - new counter value for decryption of the next block; \ * - CBC-MAC over the next encrypted block. \ * Each iteration performs the two AES instances related \ * to the current block; there is thus no need for some \ * extra pre-loop and post-loop work as in encryption. \ */ \ \ mtctr(%[num_blocks]) \ \ label(loop) \ /* \ * Upon loop entry: \ * v16 counter value for next block \ * v17 current CBC-MAC value \ */ \ lxvw4x(52, %[cc], %[buf]) \ BYTESWAP(20) \ vxor(17, 17, 20) \ INCR_128(22, 16) \ BLOCK_ENCRYPT_X2_ ## size(16, 17) \ vxor(20, 20, 16) \ BYTESWAPX(21, 20) \ stxvw4x(53, %[cc], %[buf]) \ addi(%[buf], %[buf], 16) \ vand(16, 22, 22) \ \ bdnz(loop) \ \ /* \ * Store back counter and CBC-MAC value. \ */ \ BYTESWAP(16) \ BYTESWAP(17) \ stxvw4x(48, %[cc], %[ctr]) \ stxvw4x(49, %[cc], %[cbcmac]) \ \ : [cc] "+b" (cc), [buf] "+b" (buf) \ : [sk] "b" (sk), [ctr] "b" (ctr), [cbcmac] "b" (cbcmac), \ [num_blocks] "b" (num_blocks), [ctrinc] "b" (ctrinc) \ BYTESWAP_REG \ : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", \ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", \ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", \ "v30", "ctr", "memory" \ ); \ } MKDECRYPT(128) MKDECRYPT(192) MKDECRYPT(256) /* see bearssl_block.h */ void br_aes_pwr8_ctrcbc_encrypt(const br_aes_pwr8_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { if (len == 0) { return; } switch (ctx->num_rounds) { case 10: ctrcbc_128_encrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; case 12: ctrcbc_192_encrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; default: ctrcbc_256_encrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; } } /* see bearssl_block.h */ void br_aes_pwr8_ctrcbc_decrypt(const br_aes_pwr8_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { if (len == 0) { return; } switch (ctx->num_rounds) { case 10: ctrcbc_128_decrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; case 12: ctrcbc_192_decrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; default: ctrcbc_256_decrypt(ctx->skey.skni, ctr, cbcmac, data, len >> 4); break; } } static inline void incr_ctr(void *dst, const void *src) { uint64_t hi, lo; hi = br_dec64be(src); lo = br_dec64be((const unsigned char *)src + 8); lo ++; hi += ((lo | -lo) >> 63) ^ (uint64_t)1; br_enc64be(dst, hi); br_enc64be((unsigned char *)dst + 8, lo); } /* see bearssl_block.h */ void br_aes_pwr8_ctrcbc_ctr(const br_aes_pwr8_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char ctrbuf[64]; memcpy(ctrbuf, ctr, 16); incr_ctr(ctrbuf + 16, ctrbuf); incr_ctr(ctrbuf + 32, ctrbuf + 16); incr_ctr(ctrbuf + 48, ctrbuf + 32); if (len >= 64) { switch (ctx->num_rounds) { case 10: ctr_128(ctx->skey.skni, ctrbuf, data, len >> 6); break; case 12: ctr_192(ctx->skey.skni, ctrbuf, data, len >> 6); break; default: ctr_256(ctx->skey.skni, ctrbuf, data, len >> 6); break; } data = (unsigned char *)data + (len & ~(size_t)63); len &= 63; } if (len > 0) { unsigned char tmp[64]; if (len >= 32) { if (len >= 48) { memcpy(ctr, ctrbuf + 48, 16); } else { memcpy(ctr, ctrbuf + 32, 16); } } else { if (len >= 16) { memcpy(ctr, ctrbuf + 16, 16); } } memcpy(tmp, data, len); memset(tmp + len, 0, (sizeof tmp) - len); switch (ctx->num_rounds) { case 10: ctr_128(ctx->skey.skni, ctrbuf, tmp, 1); break; case 12: ctr_192(ctx->skey.skni, ctrbuf, tmp, 1); break; default: ctr_256(ctx->skey.skni, ctrbuf, tmp, 1); break; } memcpy(data, tmp, len); } else { memcpy(ctr, ctrbuf, 16); } } /* see bearssl_block.h */ void br_aes_pwr8_ctrcbc_mac(const br_aes_pwr8_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { if (len > 0) { switch (ctx->num_rounds) { case 10: cbcmac_128(ctx->skey.skni, cbcmac, data, len >> 4); break; case 12: cbcmac_192(ctx->skey.skni, cbcmac, data, len >> 4); break; default: cbcmac_256(ctx->skey.skni, cbcmac, data, len >> 4); break; } } } /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_pwr8_ctrcbc_vtable = { sizeof(br_aes_pwr8_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_pwr8_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_pwr8_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_pwr8_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_pwr8_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_pwr8_ctrcbc_mac }; #else /* see bearssl_block.h */ const br_block_ctrcbc_class * br_aes_pwr8_ctrcbc_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_small_cbcdec_init(br_aes_small_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_small_cbcdec_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_small_cbcdec_run(const br_aes_small_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16]; int i; memcpy(tmp, buf, 16); br_aes_small_decrypt(ctx->num_rounds, ctx->skey, buf); for (i = 0; i < 16; i ++) { buf[i] ^= ivbuf[i]; } memcpy(ivbuf, tmp, 16); buf += 16; len -= 16; } } /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_small_cbcdec_vtable = { sizeof(br_aes_small_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_small_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_small_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_small_cbcenc_init(br_aes_small_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_small_cbcenc_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_aes_small_cbcenc_run(const br_aes_small_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { int i; for (i = 0; i < 16; i ++) { buf[i] ^= ivbuf[i]; } br_aes_small_encrypt(ctx->num_rounds, ctx->skey, buf); memcpy(ivbuf, buf, 16); buf += 16; len -= 16; } } /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_small_cbcenc_vtable = { sizeof(br_aes_small_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_small_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_small_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_small_ctr_init(br_aes_small_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_small_ctr_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_small_ctr_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ uint32_t br_aes_small_ctr_run(const br_aes_small_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16]; memcpy(tmp, iv, 12); br_enc32be(tmp + 12, cc ++); br_aes_small_encrypt(ctx->num_rounds, ctx->skey, tmp); if (len <= 16) { _src_symcipher_aes_small_ctr_cxorbuf(buf, tmp, len); break; } _src_symcipher_aes_small_ctr_cxorbuf(buf, tmp, 16); buf += 16; len -= 16; } return cc; } /* see bearssl_block.h */ const br_block_ctr_class br_aes_small_ctr_vtable = { sizeof(br_aes_small_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_small_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_small_ctr_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_aes_small_ctrcbc_init(br_aes_small_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_small_ctrcbc_vtable; ctx->num_rounds = br_aes_keysched(ctx->skey, key, len); } static void _src_symcipher_aes_small_ctrcbc_cxorbuf(void *dst, const void *src, size_t len) { unsigned char *d; const unsigned char *s; d = (unsigned char*)dst; s = (const unsigned char*)src; while (len -- > 0) { *d ++ ^= *s ++; } } /* see bearssl_block.h */ void br_aes_small_ctrcbc_ctr(const br_aes_small_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char *buf, *bctr; uint32_t cc0, cc1, cc2, cc3; buf =(unsigned char*) data; bctr = (unsigned char*)ctr; cc3 = br_dec32be(bctr + 0); cc2 = br_dec32be(bctr + 4); cc1 = br_dec32be(bctr + 8); cc0 = br_dec32be(bctr + 12); while (len > 0) { unsigned char tmp[16]; uint32_t carry; br_enc32be(tmp + 0, cc3); br_enc32be(tmp + 4, cc2); br_enc32be(tmp + 8, cc1); br_enc32be(tmp + 12, cc0); br_aes_small_encrypt(ctx->num_rounds, ctx->skey, tmp); _src_symcipher_aes_small_ctrcbc_cxorbuf(buf, tmp, 16); buf += 16; len -= 16; cc0 ++; carry = (~(cc0 | -cc0)) >> 31; cc1 += carry; carry &= (~(cc1 | -cc1)) >> 31; cc2 += carry; carry &= (~(cc2 | -cc2)) >> 31; cc3 += carry; } br_enc32be(bctr + 0, cc3); br_enc32be(bctr + 4, cc2); br_enc32be(bctr + 8, cc1); br_enc32be(bctr + 12, cc0); } /* see bearssl_block.h */ void br_aes_small_ctrcbc_mac(const br_aes_small_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { const unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { _src_symcipher_aes_small_ctrcbc_cxorbuf(cbcmac, buf, 16); br_aes_small_encrypt(ctx->num_rounds, ctx->skey, cbcmac); buf += 16; len -= 16; } } /* see bearssl_block.h */ void br_aes_small_ctrcbc_encrypt(const br_aes_small_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { br_aes_small_ctrcbc_ctr(ctx, ctr, data, len); br_aes_small_ctrcbc_mac(ctx, cbcmac, data, len); } /* see bearssl_block.h */ void br_aes_small_ctrcbc_decrypt(const br_aes_small_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { br_aes_small_ctrcbc_mac(ctx, cbcmac, data, len); br_aes_small_ctrcbc_ctr(ctx, ctr, data, len); } /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_small_ctrcbc_vtable = { sizeof(br_aes_small_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_small_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_small_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_small_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_small_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_small_ctrcbc_mac }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Inverse S-box. */ static const unsigned char _src_symcipher_aes_small_dec_ciS[] = { 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D }; static void _src_symcipher_aes_small_dec_cadd_round_key(unsigned *state, const uint32_t *skeys) { int i; for (i = 0; i < 16; i += 4) { uint32_t k; k = *skeys ++; state[i + 0] ^= (unsigned)(k >> 24); state[i + 1] ^= (unsigned)(k >> 16) & 0xFF; state[i + 2] ^= (unsigned)(k >> 8) & 0xFF; state[i + 3] ^= (unsigned)k & 0xFF; } } static void inv_sub_bytes(unsigned *state) { int i; for (i = 0; i < 16; i ++) { state[i] = _src_symcipher_aes_small_dec_ciS[state[i]]; } } static void inv__src_symcipher_aes_small_dec_cshift_rows(unsigned *state) { unsigned tmp; tmp = state[13]; state[13] = state[9]; state[9] = state[5]; state[5] = state[1]; state[1] = tmp; tmp = state[2]; state[2] = state[10]; state[10] = tmp; tmp = state[6]; state[6] = state[14]; state[14] = tmp; tmp = state[3]; state[3] = state[7]; state[7] = state[11]; state[11] = state[15]; state[15] = tmp; } static inline unsigned gf256red(unsigned x) { unsigned y; y = x >> 8; return (x ^ y ^ (y << 1) ^ (y << 3) ^ (y << 4)) & 0xFF; } static void inv__src_symcipher_aes_small_dec_cmix_columns(unsigned *state) { int i; for (i = 0; i < 16; i += 4) { unsigned s0, s1, s2, s3; unsigned t0, t1, t2, t3; s0 = state[i + 0]; s1 = state[i + 1]; s2 = state[i + 2]; s3 = state[i + 3]; t0 = (s0 << 1) ^ (s0 << 2) ^ (s0 << 3) ^ s1 ^ (s1 << 1) ^ (s1 << 3) ^ s2 ^ (s2 << 2) ^ (s2 << 3) ^ s3 ^ (s3 << 3); t1 = s0 ^ (s0 << 3) ^ (s1 << 1) ^ (s1 << 2) ^ (s1 << 3) ^ s2 ^ (s2 << 1) ^ (s2 << 3) ^ s3 ^ (s3 << 2) ^ (s3 << 3); t2 = s0 ^ (s0 << 2) ^ (s0 << 3) ^ s1 ^ (s1 << 3) ^ (s2 << 1) ^ (s2 << 2) ^ (s2 << 3) ^ s3 ^ (s3 << 1) ^ (s3 << 3); t3 = s0 ^ (s0 << 1) ^ (s0 << 3) ^ s1 ^ (s1 << 2) ^ (s1 << 3) ^ s2 ^ (s2 << 3) ^ (s3 << 1) ^ (s3 << 2) ^ (s3 << 3); state[i + 0] = gf256red(t0); state[i + 1] = gf256red(t1); state[i + 2] = gf256red(t2); state[i + 3] = gf256red(t3); } } /* see inner.h */ void br_aes_small_decrypt(unsigned num_rounds, const uint32_t *skey, void *data) { unsigned char *buf; unsigned state[16]; unsigned u; buf = (unsigned char*)data; for (u = 0; u < 16; u ++) { state[u] = buf[u]; } _src_symcipher_aes_small_dec_cadd_round_key(state, skey + (num_rounds << 2)); for (u = num_rounds - 1; u > 0; u --) { inv__src_symcipher_aes_small_dec_cshift_rows(state); inv_sub_bytes(state); _src_symcipher_aes_small_dec_cadd_round_key(state, skey + (u << 2)); inv__src_symcipher_aes_small_dec_cmix_columns(state); } inv__src_symcipher_aes_small_dec_cshift_rows(state); inv_sub_bytes(state); _src_symcipher_aes_small_dec_cadd_round_key(state, skey); for (u = 0; u < 16; u ++) { buf[u] = state[u]; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define S br_aes_S static void _src_symcipher_aes_small_enc_cadd_round_key(unsigned *state, const uint32_t *skeys) { int i; for (i = 0; i < 16; i += 4) { uint32_t k; k = *skeys ++; state[i + 0] ^= (unsigned)(k >> 24); state[i + 1] ^= (unsigned)(k >> 16) & 0xFF; state[i + 2] ^= (unsigned)(k >> 8) & 0xFF; state[i + 3] ^= (unsigned)k & 0xFF; } } static void sub_bytes(unsigned *state) { int i; for (i = 0; i < 16; i ++) { state[i] = S[state[i]]; } } static void _src_symcipher_aes_small_enc_cshift_rows(unsigned *state) { unsigned tmp; tmp = state[1]; state[1] = state[5]; state[5] = state[9]; state[9] = state[13]; state[13] = tmp; tmp = state[2]; state[2] = state[10]; state[10] = tmp; tmp = state[6]; state[6] = state[14]; state[14] = tmp; tmp = state[15]; state[15] = state[11]; state[11] = state[7]; state[7] = state[3]; state[3] = tmp; } static void _src_symcipher_aes_small_enc_cmix_columns(unsigned *state) { int i; for (i = 0; i < 16; i += 4) { unsigned s0, s1, s2, s3; unsigned t0, t1, t2, t3; s0 = state[i + 0]; s1 = state[i + 1]; s2 = state[i + 2]; s3 = state[i + 3]; t0 = (s0 << 1) ^ s1 ^ (s1 << 1) ^ s2 ^ s3; t1 = s0 ^ (s1 << 1) ^ s2 ^ (s2 << 1) ^ s3; t2 = s0 ^ s1 ^ (s2 << 1) ^ s3 ^ (s3 << 1); t3 = s0 ^ (s0 << 1) ^ s1 ^ s2 ^ (s3 << 1); state[i + 0] = t0 ^ ((unsigned)(-(int)(t0 >> 8)) & 0x11B); state[i + 1] = t1 ^ ((unsigned)(-(int)(t1 >> 8)) & 0x11B); state[i + 2] = t2 ^ ((unsigned)(-(int)(t2 >> 8)) & 0x11B); state[i + 3] = t3 ^ ((unsigned)(-(int)(t3 >> 8)) & 0x11B); } } /* see inner.h */ void br_aes_small_encrypt(unsigned num_rounds, const uint32_t *skey, void *data) { unsigned char *buf; unsigned state[16]; unsigned u; buf = (unsigned char*)data; for (u = 0; u < 16; u ++) { state[u] = buf[u]; } _src_symcipher_aes_small_enc_cadd_round_key(state, skey); for (u = 1; u < num_rounds; u ++) { sub_bytes(state); _src_symcipher_aes_small_enc_cshift_rows(state); _src_symcipher_aes_small_enc_cmix_columns(state); _src_symcipher_aes_small_enc_cadd_round_key(state, skey + (u << 2)); } sub_bytes(state); _src_symcipher_aes_small_enc_cshift_rows(state); _src_symcipher_aes_small_enc_cadd_round_key(state, skey + (num_rounds << 2)); for (u = 0; u < 16; u ++) { buf[u] = state[u]; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 /* * This code contains the AES key schedule implementation using the * AES-NI opcodes. */ #if BR_AES_X86NI /* see inner.h */ int br_aes_x86ni_supported(void) { /* * Bit mask for features in ECX: * 19 SSE4.1 (used for _mm_insert_epi32(), for AES-CTR) * 25 AES-NI */ return br_cpuid(0, 0, 0x02080000, 0); } BR_TARGETS_X86_UP BR_TARGET("sse2,aes") static inline __m128i expand_step128(__m128i k, __m128i k2) { k = _mm_xor_si128(k, _mm_slli_si128(k, 4)); k = _mm_xor_si128(k, _mm_slli_si128(k, 4)); k = _mm_xor_si128(k, _mm_slli_si128(k, 4)); k2 = _mm_shuffle_epi32(k2, 0xFF); return _mm_xor_si128(k, k2); } BR_TARGET("sse2,aes") static inline void expand_step192(__m128i *t1, __m128i *t2, __m128i *t3) { __m128i t4; *t2 = _mm_shuffle_epi32(*t2, 0x55); t4 = _mm_slli_si128(*t1, 0x4); *t1 = _mm_xor_si128(*t1, t4); t4 = _mm_slli_si128(t4, 0x4); *t1 = _mm_xor_si128(*t1, t4); t4 = _mm_slli_si128(t4, 0x4); *t1 = _mm_xor_si128(*t1, t4); *t1 = _mm_xor_si128(*t1, *t2); *t2 = _mm_shuffle_epi32(*t1, 0xFF); t4 = _mm_slli_si128(*t3, 0x4); *t3 = _mm_xor_si128(*t3, t4); *t3 = _mm_xor_si128(*t3, *t2); } BR_TARGET("sse2,aes") static inline void expand_step256_1(__m128i *t1, __m128i *t2) { __m128i t4; *t2 = _mm_shuffle_epi32(*t2, 0xFF); t4 = _mm_slli_si128(*t1, 0x4); *t1 = _mm_xor_si128(*t1, t4); t4 = _mm_slli_si128(t4, 0x4); *t1 = _mm_xor_si128(*t1, t4); t4 = _mm_slli_si128(t4, 0x4); *t1 = _mm_xor_si128(*t1, t4); *t1 = _mm_xor_si128(*t1, *t2); } BR_TARGET("sse2,aes") static inline void expand_step256_2(__m128i *t1, __m128i *t3) { __m128i t2, t4; t4 = _mm_aeskeygenassist_si128(*t1, 0x0); t2 = _mm_shuffle_epi32(t4, 0xAA); t4 = _mm_slli_si128(*t3, 0x4); *t3 = _mm_xor_si128(*t3, t4); t4 = _mm_slli_si128(t4, 0x4); *t3 = _mm_xor_si128(*t3, t4); t4 = _mm_slli_si128(t4, 0x4); *t3 = _mm_xor_si128(*t3, t4); *t3 = _mm_xor_si128(*t3, t2); } /* * Perform key schedule for AES, encryption direction. Subkeys are written * in sk[], and the number of rounds is returned. Key length MUST be 16, * 24 or 32 bytes. */ BR_TARGET("sse2,aes") static unsigned x86ni_keysched(__m128i *sk, const void *key, size_t len) { const unsigned char *kb; #define KEXP128(k, i, rcon) do { \ k = expand_step128(k, _mm_aeskeygenassist_si128(k, rcon)); \ sk[i] = k; \ } while (0) #define KEXP192(i, rcon1, rcon2) do { \ sk[(i) + 0] = t1; \ sk[(i) + 1] = t3; \ t2 = _mm_aeskeygenassist_si128(t3, rcon1); \ expand_step192(&t1, &t2, &t3); \ sk[(i) + 1] = _mm_castpd_si128(_mm_shuffle_pd( \ _mm_castsi128_pd(sk[(i) + 1]), \ _mm_castsi128_pd(t1), 0)); \ sk[(i) + 2] = _mm_castpd_si128(_mm_shuffle_pd( \ _mm_castsi128_pd(t1), \ _mm_castsi128_pd(t3), 1)); \ t2 = _mm_aeskeygenassist_si128(t3, rcon2); \ expand_step192(&t1, &t2, &t3); \ } while (0) #define KEXP256(i, rcon) do { \ sk[(i) + 0] = t3; \ t2 = _mm_aeskeygenassist_si128(t3, rcon); \ expand_step256_1(&t1, &t2); \ sk[(i) + 1] = t1; \ expand_step256_2(&t1, &t3); \ } while (0) kb = (const unsigned char*)key; switch (len) { __m128i t1, t2, t3; case 16: t1 = _mm_loadu_si128((const __m128i_u*)kb); sk[0] = t1; KEXP128(t1, 1, 0x01); KEXP128(t1, 2, 0x02); KEXP128(t1, 3, 0x04); KEXP128(t1, 4, 0x08); KEXP128(t1, 5, 0x10); KEXP128(t1, 6, 0x20); KEXP128(t1, 7, 0x40); KEXP128(t1, 8, 0x80); KEXP128(t1, 9, 0x1B); KEXP128(t1, 10, 0x36); return 10; case 24: t1 = _mm_loadu_si128((const __m128i_u*)kb); t3 = _mm_loadu_si128((const __m128i_u*)(kb + 8)); t3 = _mm_shuffle_epi32(t3, 0x4E); KEXP192(0, 0x01, 0x02); KEXP192(3, 0x04, 0x08); KEXP192(6, 0x10, 0x20); KEXP192(9, 0x40, 0x80); sk[12] = t1; return 12; case 32: t1 = _mm_loadu_si128((const __m128i_u*)kb); t3 = _mm_loadu_si128((const __m128i_u*)(kb + 16)); sk[0] = t1; KEXP256( 1, 0x01); KEXP256( 3, 0x02); KEXP256( 5, 0x04); KEXP256( 7, 0x08); KEXP256( 9, 0x10); KEXP256(11, 0x20); sk[13] = t3; t2 = _mm_aeskeygenassist_si128(t3, 0x40); expand_step256_1(&t1, &t2); sk[14] = t1; return 14; default: return 0; } #undef KEXP128 #undef KEXP192 #undef KEXP256 } /* see inner.h */ BR_TARGET("sse2,aes") unsigned br_aes_x86ni_keysched_enc(unsigned char *skni, const void *key, size_t len) { __m128i sk[15]; unsigned num_rounds; num_rounds = x86ni_keysched(sk, key, len); memcpy(skni, sk, (num_rounds + 1) << 4); return num_rounds; } /* see inner.h */ BR_TARGET("sse2,aes") unsigned br_aes_x86ni_keysched_dec(unsigned char *skni, const void *key, size_t len) { __m128i sk[15]; unsigned u, num_rounds; num_rounds = x86ni_keysched(sk, key, len); _mm_storeu_si128((__m128i_u*)skni, sk[num_rounds]); for (u = 1; u < num_rounds; u ++) { _mm_storeu_si128((__m128i_u*)(skni + (u << 4)), _mm_aesimc_si128(sk[num_rounds - u])); } _mm_storeu_si128((__m128i_u*)(skni + (num_rounds << 4)), sk[0]); return num_rounds; } BR_TARGETS_X86_DOWN #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_AES_X86NI /* see bearssl_block.h */ const br_block_cbcdec_class * br_aes_x86ni_cbcdec_get_vtable(void) { return br_aes_x86ni_supported() ? &br_aes_x86ni_cbcdec_vtable : NULL; } /* see bearssl_block.h */ void br_aes_x86ni_cbcdec_init(br_aes_x86ni_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_x86ni_cbcdec_vtable; ctx->num_rounds = br_aes_x86ni_keysched_dec(ctx->skey.skni, key, len); } BR_TARGETS_X86_UP /* see bearssl_block.h */ BR_TARGET("sse2,aes") void br_aes_x86ni_cbcdec_run(const br_aes_x86ni_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf; unsigned num_rounds; __m128i sk[15], ivx; unsigned u; buf = (unsigned char*)data; ivx = _mm_loadu_si128((const __m128i_u*)iv); num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } while (len > 0) { __m128i x0, x1, x2, x3, e0, e1, e2, e3; x0 = _mm_loadu_si128((const __m128i_u*)(buf + 0)); if (len >= 64) { x1 = _mm_loadu_si128((const __m128i_u*)(buf + 16)); x2 = _mm_loadu_si128((const __m128i_u*)(buf + 32)); x3 = _mm_loadu_si128((const __m128i_u*)(buf + 48)); } else { x0 = _mm_loadu_si128((const __m128i_u*)(buf + 0)); if (len >= 32) { x1 = _mm_loadu_si128((const __m128i_u*)(buf + 16)); if (len >= 48) { x2 = _mm_loadu_si128( (const __m128i_u*)(buf + 32)); x3 = x2; } else { x2 = x0; x3 = x1; } } else { x1 = x0; x2 = x0; x3 = x0; } } e0 = x0; e1 = x1; e2 = x2; e3 = x3; x0 = _mm_xor_si128(x0, sk[0]); x1 = _mm_xor_si128(x1, sk[0]); x2 = _mm_xor_si128(x2, sk[0]); x3 = _mm_xor_si128(x3, sk[0]); x0 = _mm_aesdec_si128(x0, sk[1]); x1 = _mm_aesdec_si128(x1, sk[1]); x2 = _mm_aesdec_si128(x2, sk[1]); x3 = _mm_aesdec_si128(x3, sk[1]); x0 = _mm_aesdec_si128(x0, sk[2]); x1 = _mm_aesdec_si128(x1, sk[2]); x2 = _mm_aesdec_si128(x2, sk[2]); x3 = _mm_aesdec_si128(x3, sk[2]); x0 = _mm_aesdec_si128(x0, sk[3]); x1 = _mm_aesdec_si128(x1, sk[3]); x2 = _mm_aesdec_si128(x2, sk[3]); x3 = _mm_aesdec_si128(x3, sk[3]); x0 = _mm_aesdec_si128(x0, sk[4]); x1 = _mm_aesdec_si128(x1, sk[4]); x2 = _mm_aesdec_si128(x2, sk[4]); x3 = _mm_aesdec_si128(x3, sk[4]); x0 = _mm_aesdec_si128(x0, sk[5]); x1 = _mm_aesdec_si128(x1, sk[5]); x2 = _mm_aesdec_si128(x2, sk[5]); x3 = _mm_aesdec_si128(x3, sk[5]); x0 = _mm_aesdec_si128(x0, sk[6]); x1 = _mm_aesdec_si128(x1, sk[6]); x2 = _mm_aesdec_si128(x2, sk[6]); x3 = _mm_aesdec_si128(x3, sk[6]); x0 = _mm_aesdec_si128(x0, sk[7]); x1 = _mm_aesdec_si128(x1, sk[7]); x2 = _mm_aesdec_si128(x2, sk[7]); x3 = _mm_aesdec_si128(x3, sk[7]); x0 = _mm_aesdec_si128(x0, sk[8]); x1 = _mm_aesdec_si128(x1, sk[8]); x2 = _mm_aesdec_si128(x2, sk[8]); x3 = _mm_aesdec_si128(x3, sk[8]); x0 = _mm_aesdec_si128(x0, sk[9]); x1 = _mm_aesdec_si128(x1, sk[9]); x2 = _mm_aesdec_si128(x2, sk[9]); x3 = _mm_aesdec_si128(x3, sk[9]); if (num_rounds == 10) { x0 = _mm_aesdeclast_si128(x0, sk[10]); x1 = _mm_aesdeclast_si128(x1, sk[10]); x2 = _mm_aesdeclast_si128(x2, sk[10]); x3 = _mm_aesdeclast_si128(x3, sk[10]); } else if (num_rounds == 12) { x0 = _mm_aesdec_si128(x0, sk[10]); x1 = _mm_aesdec_si128(x1, sk[10]); x2 = _mm_aesdec_si128(x2, sk[10]); x3 = _mm_aesdec_si128(x3, sk[10]); x0 = _mm_aesdec_si128(x0, sk[11]); x1 = _mm_aesdec_si128(x1, sk[11]); x2 = _mm_aesdec_si128(x2, sk[11]); x3 = _mm_aesdec_si128(x3, sk[11]); x0 = _mm_aesdeclast_si128(x0, sk[12]); x1 = _mm_aesdeclast_si128(x1, sk[12]); x2 = _mm_aesdeclast_si128(x2, sk[12]); x3 = _mm_aesdeclast_si128(x3, sk[12]); } else { x0 = _mm_aesdec_si128(x0, sk[10]); x1 = _mm_aesdec_si128(x1, sk[10]); x2 = _mm_aesdec_si128(x2, sk[10]); x3 = _mm_aesdec_si128(x3, sk[10]); x0 = _mm_aesdec_si128(x0, sk[11]); x1 = _mm_aesdec_si128(x1, sk[11]); x2 = _mm_aesdec_si128(x2, sk[11]); x3 = _mm_aesdec_si128(x3, sk[11]); x0 = _mm_aesdec_si128(x0, sk[12]); x1 = _mm_aesdec_si128(x1, sk[12]); x2 = _mm_aesdec_si128(x2, sk[12]); x3 = _mm_aesdec_si128(x3, sk[12]); x0 = _mm_aesdec_si128(x0, sk[13]); x1 = _mm_aesdec_si128(x1, sk[13]); x2 = _mm_aesdec_si128(x2, sk[13]); x3 = _mm_aesdec_si128(x3, sk[13]); x0 = _mm_aesdeclast_si128(x0, sk[14]); x1 = _mm_aesdeclast_si128(x1, sk[14]); x2 = _mm_aesdeclast_si128(x2, sk[14]); x3 = _mm_aesdeclast_si128(x3, sk[14]); } x0 = _mm_xor_si128(x0, ivx); x1 = _mm_xor_si128(x1, e0); x2 = _mm_xor_si128(x2, e1); x3 = _mm_xor_si128(x3, e2); ivx = e3; _mm_storeu_si128((__m128i_u*)(buf + 0), x0); if (len >= 64) { _mm_storeu_si128((__m128i_u*)(buf + 16), x1); _mm_storeu_si128((__m128i_u*)(buf + 32), x2); _mm_storeu_si128((__m128i_u*)(buf + 48), x3); buf += 64; len -= 64; } else { if (len >= 32) { _mm_storeu_si128((__m128i_u*)(buf + 16), x1); if (len >= 48) { _mm_storeu_si128( (__m128i_u*)(buf + 32), x2); } } break; } } _mm_storeu_si128((__m128i_u*)iv, ivx); } BR_TARGETS_X86_DOWN /* see bearssl_block.h */ const br_block_cbcdec_class br_aes_x86ni_cbcdec_vtable = { sizeof(br_aes_x86ni_cbcdec_keys), 16, 4, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_aes_x86ni_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_aes_x86ni_cbcdec_run }; #else /* see bearssl_block.h */ const br_block_cbcdec_class * br_aes_x86ni_cbcdec_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_AES_X86NI /* see bearssl_block.h */ const br_block_cbcenc_class * br_aes_x86ni_cbcenc_get_vtable(void) { return br_aes_x86ni_supported() ? &br_aes_x86ni_cbcenc_vtable : NULL; } /* see bearssl_block.h */ void br_aes_x86ni_cbcenc_init(br_aes_x86ni_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_x86ni_cbcenc_vtable; ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len); } BR_TARGETS_X86_UP /* see bearssl_block.h */ BR_TARGET("sse2,aes") void br_aes_x86ni_cbcenc_run(const br_aes_x86ni_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf; unsigned num_rounds; __m128i sk[15], ivx; unsigned u; buf = (unsigned char*)data; ivx = _mm_loadu_si128((const __m128i_u*)iv); num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } while (len > 0) { __m128i x; x = _mm_xor_si128(_mm_loadu_si128((const __m128i_u*)buf), ivx); x = _mm_xor_si128(x, sk[0]); x = _mm_aesenc_si128(x, sk[1]); x = _mm_aesenc_si128(x, sk[2]); x = _mm_aesenc_si128(x, sk[3]); x = _mm_aesenc_si128(x, sk[4]); x = _mm_aesenc_si128(x, sk[5]); x = _mm_aesenc_si128(x, sk[6]); x = _mm_aesenc_si128(x, sk[7]); x = _mm_aesenc_si128(x, sk[8]); x = _mm_aesenc_si128(x, sk[9]); if (num_rounds == 10) { x = _mm_aesenclast_si128(x, sk[10]); } else if (num_rounds == 12) { x = _mm_aesenc_si128(x, sk[10]); x = _mm_aesenc_si128(x, sk[11]); x = _mm_aesenclast_si128(x, sk[12]); } else { x = _mm_aesenc_si128(x, sk[10]); x = _mm_aesenc_si128(x, sk[11]); x = _mm_aesenc_si128(x, sk[12]); x = _mm_aesenc_si128(x, sk[13]); x = _mm_aesenclast_si128(x, sk[14]); } ivx = x; _mm_storeu_si128((__m128i_u*)buf, x); buf += 16; len -= 16; } _mm_storeu_si128((__m128i_u*)iv, ivx); } BR_TARGETS_X86_DOWN /* see bearssl_block.h */ const br_block_cbcenc_class br_aes_x86ni_cbcenc_vtable = { sizeof(br_aes_x86ni_cbcenc_keys), 16, 4, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_aes_x86ni_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_aes_x86ni_cbcenc_run }; #else /* see bearssl_block.h */ const br_block_cbcenc_class * br_aes_x86ni_cbcenc_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_AES_X86NI /* see bearssl_block.h */ const br_block_ctr_class * br_aes_x86ni_ctr_get_vtable(void) { return br_aes_x86ni_supported() ? &br_aes_x86ni_ctr_vtable : NULL; } /* see bearssl_block.h */ void br_aes_x86ni_ctr_init(br_aes_x86ni_ctr_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_x86ni_ctr_vtable; ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len); } BR_TARGETS_X86_UP /* see bearssl_block.h */ BR_TARGET("sse2,sse4.1,aes") uint32_t br_aes_x86ni_ctr_run(const br_aes_x86ni_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; unsigned char ivbuf[16]; unsigned num_rounds; __m128i sk[15]; __m128i ivx; unsigned u; buf = (unsigned char*)data; memcpy(ivbuf, iv, 12); num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } ivx = _mm_loadu_si128((const __m128i_u*)ivbuf); while (len > 0) { __m128i x0, x1, x2, x3; x0 = _mm_insert_epi32(ivx, br_bswap32(cc + 0), 3); x1 = _mm_insert_epi32(ivx, br_bswap32(cc + 1), 3); x2 = _mm_insert_epi32(ivx, br_bswap32(cc + 2), 3); x3 = _mm_insert_epi32(ivx, br_bswap32(cc + 3), 3); x0 = _mm_xor_si128(x0, sk[0]); x1 = _mm_xor_si128(x1, sk[0]); x2 = _mm_xor_si128(x2, sk[0]); x3 = _mm_xor_si128(x3, sk[0]); x0 = _mm_aesenc_si128(x0, sk[1]); x1 = _mm_aesenc_si128(x1, sk[1]); x2 = _mm_aesenc_si128(x2, sk[1]); x3 = _mm_aesenc_si128(x3, sk[1]); x0 = _mm_aesenc_si128(x0, sk[2]); x1 = _mm_aesenc_si128(x1, sk[2]); x2 = _mm_aesenc_si128(x2, sk[2]); x3 = _mm_aesenc_si128(x3, sk[2]); x0 = _mm_aesenc_si128(x0, sk[3]); x1 = _mm_aesenc_si128(x1, sk[3]); x2 = _mm_aesenc_si128(x2, sk[3]); x3 = _mm_aesenc_si128(x3, sk[3]); x0 = _mm_aesenc_si128(x0, sk[4]); x1 = _mm_aesenc_si128(x1, sk[4]); x2 = _mm_aesenc_si128(x2, sk[4]); x3 = _mm_aesenc_si128(x3, sk[4]); x0 = _mm_aesenc_si128(x0, sk[5]); x1 = _mm_aesenc_si128(x1, sk[5]); x2 = _mm_aesenc_si128(x2, sk[5]); x3 = _mm_aesenc_si128(x3, sk[5]); x0 = _mm_aesenc_si128(x0, sk[6]); x1 = _mm_aesenc_si128(x1, sk[6]); x2 = _mm_aesenc_si128(x2, sk[6]); x3 = _mm_aesenc_si128(x3, sk[6]); x0 = _mm_aesenc_si128(x0, sk[7]); x1 = _mm_aesenc_si128(x1, sk[7]); x2 = _mm_aesenc_si128(x2, sk[7]); x3 = _mm_aesenc_si128(x3, sk[7]); x0 = _mm_aesenc_si128(x0, sk[8]); x1 = _mm_aesenc_si128(x1, sk[8]); x2 = _mm_aesenc_si128(x2, sk[8]); x3 = _mm_aesenc_si128(x3, sk[8]); x0 = _mm_aesenc_si128(x0, sk[9]); x1 = _mm_aesenc_si128(x1, sk[9]); x2 = _mm_aesenc_si128(x2, sk[9]); x3 = _mm_aesenc_si128(x3, sk[9]); if (num_rounds == 10) { x0 = _mm_aesenclast_si128(x0, sk[10]); x1 = _mm_aesenclast_si128(x1, sk[10]); x2 = _mm_aesenclast_si128(x2, sk[10]); x3 = _mm_aesenclast_si128(x3, sk[10]); } else if (num_rounds == 12) { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x2 = _mm_aesenc_si128(x2, sk[10]); x3 = _mm_aesenc_si128(x3, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x2 = _mm_aesenc_si128(x2, sk[11]); x3 = _mm_aesenc_si128(x3, sk[11]); x0 = _mm_aesenclast_si128(x0, sk[12]); x1 = _mm_aesenclast_si128(x1, sk[12]); x2 = _mm_aesenclast_si128(x2, sk[12]); x3 = _mm_aesenclast_si128(x3, sk[12]); } else { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x2 = _mm_aesenc_si128(x2, sk[10]); x3 = _mm_aesenc_si128(x3, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x2 = _mm_aesenc_si128(x2, sk[11]); x3 = _mm_aesenc_si128(x3, sk[11]); x0 = _mm_aesenc_si128(x0, sk[12]); x1 = _mm_aesenc_si128(x1, sk[12]); x2 = _mm_aesenc_si128(x2, sk[12]); x3 = _mm_aesenc_si128(x3, sk[12]); x0 = _mm_aesenc_si128(x0, sk[13]); x1 = _mm_aesenc_si128(x1, sk[13]); x2 = _mm_aesenc_si128(x2, sk[13]); x3 = _mm_aesenc_si128(x3, sk[13]); x0 = _mm_aesenclast_si128(x0, sk[14]); x1 = _mm_aesenclast_si128(x1, sk[14]); x2 = _mm_aesenclast_si128(x2, sk[14]); x3 = _mm_aesenclast_si128(x3, sk[14]); } if (len >= 64) { x0 = _mm_xor_si128(x0, _mm_loadu_si128((const __m128i_u*)(buf + 0))); x1 = _mm_xor_si128(x1, _mm_loadu_si128((const __m128i_u*)(buf + 16))); x2 = _mm_xor_si128(x2, _mm_loadu_si128((const __m128i_u*)(buf + 32))); x3 = _mm_xor_si128(x3, _mm_loadu_si128((const __m128i_u*)(buf + 48))); _mm_storeu_si128((__m128i_u*)(buf + 0), x0); _mm_storeu_si128((__m128i_u*)(buf + 16), x1); _mm_storeu_si128((__m128i_u*)(buf + 32), x2); _mm_storeu_si128((__m128i_u*)(buf + 48), x3); buf += 64; len -= 64; cc += 4; } else { unsigned char tmp[64]; _mm_storeu_si128((__m128i_u*)(tmp + 0), x0); _mm_storeu_si128((__m128i_u*)(tmp + 16), x1); _mm_storeu_si128((__m128i_u*)(tmp + 32), x2); _mm_storeu_si128((__m128i_u*)(tmp + 48), x3); for (u = 0; u < len; u ++) { buf[u] ^= tmp[u]; } cc += (uint32_t)len >> 4; break; } } return cc; } BR_TARGETS_X86_DOWN /* see bearssl_block.h */ const br_block_ctr_class br_aes_x86ni_ctr_vtable = { sizeof(br_aes_x86ni_ctr_keys), 16, 4, (void (*)(const br_block_ctr_class **, const void *, size_t)) &br_aes_x86ni_ctr_init, (uint32_t (*)(const br_block_ctr_class *const *, const void *, uint32_t, void *, size_t)) &br_aes_x86ni_ctr_run }; #else /* see bearssl_block.h */ const br_block_ctr_class * br_aes_x86ni_ctr_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_AES_X86NI /* see bearssl_block.h */ const br_block_ctrcbc_class * br_aes_x86ni_ctrcbc_get_vtable(void) { return br_aes_x86ni_supported() ? &br_aes_x86ni_ctrcbc_vtable : NULL; } /* see bearssl_block.h */ void br_aes_x86ni_ctrcbc_init(br_aes_x86ni_ctrcbc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_aes_x86ni_ctrcbc_vtable; ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len); } BR_TARGETS_X86_UP /* see bearssl_block.h */ BR_TARGET("sse2,sse4.1,aes") void br_aes_x86ni_ctrcbc_ctr(const br_aes_x86ni_ctrcbc_keys *ctx, void *ctr, void *data, size_t len) { unsigned char *buf; unsigned num_rounds; __m128i sk[15]; __m128i ivx0, ivx1, ivx2, ivx3; __m128i erev, zero, one, four, notthree; unsigned u; buf = (unsigned char*)data; num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } /* * Some SSE2 constants. */ erev = _mm_set_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); zero = _mm_setzero_si128(); one = _mm_set_epi64x(0, 1); four = _mm_set_epi64x(0, 4); notthree = _mm_sub_epi64(zero, four); /* * Decode the counter in big-endian and pre-increment the other * three counters. */ ivx0 = _mm_shuffle_epi8(_mm_loadu_si128((const __m128i_u*)ctr), erev); ivx1 = _mm_add_epi64(ivx0, one); ivx1 = _mm_sub_epi64(ivx1, _mm_slli_si128(_mm_cmpeq_epi64(ivx1, zero), 8)); ivx2 = _mm_add_epi64(ivx1, one); ivx2 = _mm_sub_epi64(ivx2, _mm_slli_si128(_mm_cmpeq_epi64(ivx2, zero), 8)); ivx3 = _mm_add_epi64(ivx2, one); ivx3 = _mm_sub_epi64(ivx3, _mm_slli_si128(_mm_cmpeq_epi64(ivx3, zero), 8)); while (len > 0) { __m128i x0, x1, x2, x3; /* * Load counter values; we need to _src_symcipher_aes_x86ni_ctrcbc_cbyteswap them because * the specification says that they use big-endian. */ x0 = _mm_shuffle_epi8(ivx0, erev); x1 = _mm_shuffle_epi8(ivx1, erev); x2 = _mm_shuffle_epi8(ivx2, erev); x3 = _mm_shuffle_epi8(ivx3, erev); x0 = _mm_xor_si128(x0, sk[0]); x1 = _mm_xor_si128(x1, sk[0]); x2 = _mm_xor_si128(x2, sk[0]); x3 = _mm_xor_si128(x3, sk[0]); x0 = _mm_aesenc_si128(x0, sk[1]); x1 = _mm_aesenc_si128(x1, sk[1]); x2 = _mm_aesenc_si128(x2, sk[1]); x3 = _mm_aesenc_si128(x3, sk[1]); x0 = _mm_aesenc_si128(x0, sk[2]); x1 = _mm_aesenc_si128(x1, sk[2]); x2 = _mm_aesenc_si128(x2, sk[2]); x3 = _mm_aesenc_si128(x3, sk[2]); x0 = _mm_aesenc_si128(x0, sk[3]); x1 = _mm_aesenc_si128(x1, sk[3]); x2 = _mm_aesenc_si128(x2, sk[3]); x3 = _mm_aesenc_si128(x3, sk[3]); x0 = _mm_aesenc_si128(x0, sk[4]); x1 = _mm_aesenc_si128(x1, sk[4]); x2 = _mm_aesenc_si128(x2, sk[4]); x3 = _mm_aesenc_si128(x3, sk[4]); x0 = _mm_aesenc_si128(x0, sk[5]); x1 = _mm_aesenc_si128(x1, sk[5]); x2 = _mm_aesenc_si128(x2, sk[5]); x3 = _mm_aesenc_si128(x3, sk[5]); x0 = _mm_aesenc_si128(x0, sk[6]); x1 = _mm_aesenc_si128(x1, sk[6]); x2 = _mm_aesenc_si128(x2, sk[6]); x3 = _mm_aesenc_si128(x3, sk[6]); x0 = _mm_aesenc_si128(x0, sk[7]); x1 = _mm_aesenc_si128(x1, sk[7]); x2 = _mm_aesenc_si128(x2, sk[7]); x3 = _mm_aesenc_si128(x3, sk[7]); x0 = _mm_aesenc_si128(x0, sk[8]); x1 = _mm_aesenc_si128(x1, sk[8]); x2 = _mm_aesenc_si128(x2, sk[8]); x3 = _mm_aesenc_si128(x3, sk[8]); x0 = _mm_aesenc_si128(x0, sk[9]); x1 = _mm_aesenc_si128(x1, sk[9]); x2 = _mm_aesenc_si128(x2, sk[9]); x3 = _mm_aesenc_si128(x3, sk[9]); if (num_rounds == 10) { x0 = _mm_aesenclast_si128(x0, sk[10]); x1 = _mm_aesenclast_si128(x1, sk[10]); x2 = _mm_aesenclast_si128(x2, sk[10]); x3 = _mm_aesenclast_si128(x3, sk[10]); } else if (num_rounds == 12) { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x2 = _mm_aesenc_si128(x2, sk[10]); x3 = _mm_aesenc_si128(x3, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x2 = _mm_aesenc_si128(x2, sk[11]); x3 = _mm_aesenc_si128(x3, sk[11]); x0 = _mm_aesenclast_si128(x0, sk[12]); x1 = _mm_aesenclast_si128(x1, sk[12]); x2 = _mm_aesenclast_si128(x2, sk[12]); x3 = _mm_aesenclast_si128(x3, sk[12]); } else { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x2 = _mm_aesenc_si128(x2, sk[10]); x3 = _mm_aesenc_si128(x3, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x2 = _mm_aesenc_si128(x2, sk[11]); x3 = _mm_aesenc_si128(x3, sk[11]); x0 = _mm_aesenc_si128(x0, sk[12]); x1 = _mm_aesenc_si128(x1, sk[12]); x2 = _mm_aesenc_si128(x2, sk[12]); x3 = _mm_aesenc_si128(x3, sk[12]); x0 = _mm_aesenc_si128(x0, sk[13]); x1 = _mm_aesenc_si128(x1, sk[13]); x2 = _mm_aesenc_si128(x2, sk[13]); x3 = _mm_aesenc_si128(x3, sk[13]); x0 = _mm_aesenclast_si128(x0, sk[14]); x1 = _mm_aesenclast_si128(x1, sk[14]); x2 = _mm_aesenclast_si128(x2, sk[14]); x3 = _mm_aesenclast_si128(x3, sk[14]); } if (len >= 64) { x0 = _mm_xor_si128(x0, _mm_loadu_si128((const __m128i_u*)(buf + 0))); x1 = _mm_xor_si128(x1, _mm_loadu_si128((const __m128i_u*)(buf + 16))); x2 = _mm_xor_si128(x2, _mm_loadu_si128((const __m128i_u*)(buf + 32))); x3 = _mm_xor_si128(x3, _mm_loadu_si128((const __m128i_u*)(buf + 48))); _mm_storeu_si128((__m128i_u*)(buf + 0), x0); _mm_storeu_si128((__m128i_u*)(buf + 16), x1); _mm_storeu_si128((__m128i_u*)(buf + 32), x2); _mm_storeu_si128((__m128i_u*)(buf + 48), x3); buf += 64; len -= 64; } else { unsigned char tmp[64]; _mm_storeu_si128((__m128i_u*)(tmp + 0), x0); _mm_storeu_si128((__m128i_u*)(tmp + 16), x1); _mm_storeu_si128((__m128i_u*)(tmp + 32), x2); _mm_storeu_si128((__m128i_u*)(tmp + 48), x3); for (u = 0; u < len; u ++) { buf[u] ^= tmp[u]; } switch (len) { case 16: ivx0 = ivx1; break; case 32: ivx0 = ivx2; break; case 48: ivx0 = ivx3; break; } break; } /* * Add 4 to each counter value. For carry propagation * into the upper 64-bit words, we would need to compare * the results with 4, but SSE2+ has only _signed_ * comparisons. Instead, we mask out the low two bits, * and check whether the remaining bits are zero. */ ivx0 = _mm_add_epi64(ivx0, four); ivx1 = _mm_add_epi64(ivx1, four); ivx2 = _mm_add_epi64(ivx2, four); ivx3 = _mm_add_epi64(ivx3, four); ivx0 = _mm_sub_epi64(ivx0, _mm_slli_si128(_mm_cmpeq_epi64( _mm_and_si128(ivx0, notthree), zero), 8)); ivx1 = _mm_sub_epi64(ivx1, _mm_slli_si128(_mm_cmpeq_epi64( _mm_and_si128(ivx1, notthree), zero), 8)); ivx2 = _mm_sub_epi64(ivx2, _mm_slli_si128(_mm_cmpeq_epi64( _mm_and_si128(ivx2, notthree), zero), 8)); ivx3 = _mm_sub_epi64(ivx3, _mm_slli_si128(_mm_cmpeq_epi64( _mm_and_si128(ivx3, notthree), zero), 8)); } /* * Write back new counter value. The loop took care to put the * right counter value in ivx0. */ _mm_storeu_si128((__m128i_u*)ctr, _mm_shuffle_epi8(ivx0, erev)); } /* see bearssl_block.h */ BR_TARGET("sse2,sse4.1,aes") void br_aes_x86ni_ctrcbc_mac(const br_aes_x86ni_ctrcbc_keys *ctx, void *cbcmac, const void *data, size_t len) { const unsigned char *buf; unsigned num_rounds; __m128i sk[15], ivx; unsigned u; buf = (unsigned char*)data; ivx = _mm_loadu_si128((const __m128i_u*)cbcmac); num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } while (len > 0) { __m128i x; x = _mm_xor_si128(_mm_loadu_si128((const __m128i_u*)buf), ivx); x = _mm_xor_si128(x, sk[0]); x = _mm_aesenc_si128(x, sk[1]); x = _mm_aesenc_si128(x, sk[2]); x = _mm_aesenc_si128(x, sk[3]); x = _mm_aesenc_si128(x, sk[4]); x = _mm_aesenc_si128(x, sk[5]); x = _mm_aesenc_si128(x, sk[6]); x = _mm_aesenc_si128(x, sk[7]); x = _mm_aesenc_si128(x, sk[8]); x = _mm_aesenc_si128(x, sk[9]); if (num_rounds == 10) { x = _mm_aesenclast_si128(x, sk[10]); } else if (num_rounds == 12) { x = _mm_aesenc_si128(x, sk[10]); x = _mm_aesenc_si128(x, sk[11]); x = _mm_aesenclast_si128(x, sk[12]); } else { x = _mm_aesenc_si128(x, sk[10]); x = _mm_aesenc_si128(x, sk[11]); x = _mm_aesenc_si128(x, sk[12]); x = _mm_aesenc_si128(x, sk[13]); x = _mm_aesenclast_si128(x, sk[14]); } ivx = x; buf += 16; len -= 16; } _mm_storeu_si128((__m128i_u*)cbcmac, ivx); } /* see bearssl_block.h */ BR_TARGET("sse2,sse4.1,aes") void br_aes_x86ni_ctrcbc_encrypt(const br_aes_x86ni_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { unsigned char *buf; unsigned num_rounds; __m128i sk[15]; __m128i ivx, cmx; __m128i erev, zero, one; unsigned u; int first_iter; num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } /* * Some SSE2 constants. */ erev = _mm_set_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); zero = _mm_setzero_si128(); one = _mm_set_epi64x(0, 1); /* * Decode the counter in big-endian. */ ivx = _mm_shuffle_epi8(_mm_loadu_si128((const __m128i_u*)ctr), erev); cmx = _mm_loadu_si128((const __m128i_u*)cbcmac); buf = (unsigned char*)data; first_iter = 1; while (len > 0) { __m128i dx, x0, x1; /* * Load initial values: * dx encrypted block of data * x0 counter (for CTR encryption) * x1 input for CBC-MAC */ dx = _mm_loadu_si128((const __m128i_u*)buf); x0 = _mm_shuffle_epi8(ivx, erev); x1 = cmx; x0 = _mm_xor_si128(x0, sk[0]); x1 = _mm_xor_si128(x1, sk[0]); x0 = _mm_aesenc_si128(x0, sk[1]); x1 = _mm_aesenc_si128(x1, sk[1]); x0 = _mm_aesenc_si128(x0, sk[2]); x1 = _mm_aesenc_si128(x1, sk[2]); x0 = _mm_aesenc_si128(x0, sk[3]); x1 = _mm_aesenc_si128(x1, sk[3]); x0 = _mm_aesenc_si128(x0, sk[4]); x1 = _mm_aesenc_si128(x1, sk[4]); x0 = _mm_aesenc_si128(x0, sk[5]); x1 = _mm_aesenc_si128(x1, sk[5]); x0 = _mm_aesenc_si128(x0, sk[6]); x1 = _mm_aesenc_si128(x1, sk[6]); x0 = _mm_aesenc_si128(x0, sk[7]); x1 = _mm_aesenc_si128(x1, sk[7]); x0 = _mm_aesenc_si128(x0, sk[8]); x1 = _mm_aesenc_si128(x1, sk[8]); x0 = _mm_aesenc_si128(x0, sk[9]); x1 = _mm_aesenc_si128(x1, sk[9]); if (num_rounds == 10) { x0 = _mm_aesenclast_si128(x0, sk[10]); x1 = _mm_aesenclast_si128(x1, sk[10]); } else if (num_rounds == 12) { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x0 = _mm_aesenclast_si128(x0, sk[12]); x1 = _mm_aesenclast_si128(x1, sk[12]); } else { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x0 = _mm_aesenc_si128(x0, sk[12]); x1 = _mm_aesenc_si128(x1, sk[12]); x0 = _mm_aesenc_si128(x0, sk[13]); x1 = _mm_aesenc_si128(x1, sk[13]); x0 = _mm_aesenclast_si128(x0, sk[14]); x1 = _mm_aesenclast_si128(x1, sk[14]); } x0 = _mm_xor_si128(x0, dx); if (first_iter) { cmx = _mm_xor_si128(cmx, x0); first_iter = 0; } else { cmx = _mm_xor_si128(x1, x0); } _mm_storeu_si128((__m128i_u*)buf, x0); buf += 16; len -= 16; /* * Increment the counter value. */ ivx = _mm_add_epi64(ivx, one); ivx = _mm_sub_epi64(ivx, _mm_slli_si128(_mm_cmpeq_epi64(ivx, zero), 8)); /* * If this was the last iteration, then compute the * extra block encryption to complete CBC-MAC. */ if (len == 0) { cmx = _mm_xor_si128(cmx, sk[0]); cmx = _mm_aesenc_si128(cmx, sk[1]); cmx = _mm_aesenc_si128(cmx, sk[2]); cmx = _mm_aesenc_si128(cmx, sk[3]); cmx = _mm_aesenc_si128(cmx, sk[4]); cmx = _mm_aesenc_si128(cmx, sk[5]); cmx = _mm_aesenc_si128(cmx, sk[6]); cmx = _mm_aesenc_si128(cmx, sk[7]); cmx = _mm_aesenc_si128(cmx, sk[8]); cmx = _mm_aesenc_si128(cmx, sk[9]); if (num_rounds == 10) { cmx = _mm_aesenclast_si128(cmx, sk[10]); } else if (num_rounds == 12) { cmx = _mm_aesenc_si128(cmx, sk[10]); cmx = _mm_aesenc_si128(cmx, sk[11]); cmx = _mm_aesenclast_si128(cmx, sk[12]); } else { cmx = _mm_aesenc_si128(cmx, sk[10]); cmx = _mm_aesenc_si128(cmx, sk[11]); cmx = _mm_aesenc_si128(cmx, sk[12]); cmx = _mm_aesenc_si128(cmx, sk[13]); cmx = _mm_aesenclast_si128(cmx, sk[14]); } break; } } /* * Write back new counter value and CBC-MAC value. */ _mm_storeu_si128((__m128i_u*)ctr, _mm_shuffle_epi8(ivx, erev)); _mm_storeu_si128((__m128i_u*)cbcmac, cmx); } /* see bearssl_block.h */ BR_TARGET("sse2,sse4.1,aes") void br_aes_x86ni_ctrcbc_decrypt(const br_aes_x86ni_ctrcbc_keys *ctx, void *ctr, void *cbcmac, void *data, size_t len) { unsigned char *buf; unsigned num_rounds; __m128i sk[15]; __m128i ivx, cmx; __m128i erev, zero, one; unsigned u; num_rounds = ctx->num_rounds; for (u = 0; u <= num_rounds; u ++) { sk[u] = _mm_loadu_si128((const __m128i_u*)(ctx->skey.skni + (u << 4))); } /* * Some SSE2 constants. */ erev = _mm_set_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); zero = _mm_setzero_si128(); one = _mm_set_epi64x(0, 1); /* * Decode the counter in big-endian. */ ivx = _mm_shuffle_epi8(_mm_loadu_si128((const __m128i_u*)ctr), erev); cmx = _mm_loadu_si128((const __m128i_u*)cbcmac); buf = (unsigned char*)data; while (len > 0) { __m128i dx, x0, x1; /* * Load initial values: * dx encrypted block of data * x0 counter (for CTR encryption) * x1 input for CBC-MAC */ dx = _mm_loadu_si128((const __m128i_u*)buf); x0 = _mm_shuffle_epi8(ivx, erev); x1 = _mm_xor_si128(cmx, dx); x0 = _mm_xor_si128(x0, sk[0]); x1 = _mm_xor_si128(x1, sk[0]); x0 = _mm_aesenc_si128(x0, sk[1]); x1 = _mm_aesenc_si128(x1, sk[1]); x0 = _mm_aesenc_si128(x0, sk[2]); x1 = _mm_aesenc_si128(x1, sk[2]); x0 = _mm_aesenc_si128(x0, sk[3]); x1 = _mm_aesenc_si128(x1, sk[3]); x0 = _mm_aesenc_si128(x0, sk[4]); x1 = _mm_aesenc_si128(x1, sk[4]); x0 = _mm_aesenc_si128(x0, sk[5]); x1 = _mm_aesenc_si128(x1, sk[5]); x0 = _mm_aesenc_si128(x0, sk[6]); x1 = _mm_aesenc_si128(x1, sk[6]); x0 = _mm_aesenc_si128(x0, sk[7]); x1 = _mm_aesenc_si128(x1, sk[7]); x0 = _mm_aesenc_si128(x0, sk[8]); x1 = _mm_aesenc_si128(x1, sk[8]); x0 = _mm_aesenc_si128(x0, sk[9]); x1 = _mm_aesenc_si128(x1, sk[9]); if (num_rounds == 10) { x0 = _mm_aesenclast_si128(x0, sk[10]); x1 = _mm_aesenclast_si128(x1, sk[10]); } else if (num_rounds == 12) { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x0 = _mm_aesenclast_si128(x0, sk[12]); x1 = _mm_aesenclast_si128(x1, sk[12]); } else { x0 = _mm_aesenc_si128(x0, sk[10]); x1 = _mm_aesenc_si128(x1, sk[10]); x0 = _mm_aesenc_si128(x0, sk[11]); x1 = _mm_aesenc_si128(x1, sk[11]); x0 = _mm_aesenc_si128(x0, sk[12]); x1 = _mm_aesenc_si128(x1, sk[12]); x0 = _mm_aesenc_si128(x0, sk[13]); x1 = _mm_aesenc_si128(x1, sk[13]); x0 = _mm_aesenclast_si128(x0, sk[14]); x1 = _mm_aesenclast_si128(x1, sk[14]); } x0 = _mm_xor_si128(x0, dx); cmx = x1; _mm_storeu_si128((__m128i_u*)buf, x0); buf += 16; len -= 16; /* * Increment the counter value. */ ivx = _mm_add_epi64(ivx, one); ivx = _mm_sub_epi64(ivx, _mm_slli_si128(_mm_cmpeq_epi64(ivx, zero), 8)); } /* * Write back new counter value and CBC-MAC value. */ _mm_storeu_si128((__m128i_u*)ctr, _mm_shuffle_epi8(ivx, erev)); _mm_storeu_si128((__m128i_u*)cbcmac, cmx); } BR_TARGETS_X86_DOWN /* see bearssl_block.h */ const br_block_ctrcbc_class br_aes_x86ni_ctrcbc_vtable = { sizeof(br_aes_x86ni_ctrcbc_keys), 16, 4, (void (*)(const br_block_ctrcbc_class **, const void *, size_t)) &br_aes_x86ni_ctrcbc_init, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_x86ni_ctrcbc_encrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, void *, size_t)) &br_aes_x86ni_ctrcbc_decrypt, (void (*)(const br_block_ctrcbc_class *const *, void *, void *, size_t)) &br_aes_x86ni_ctrcbc_ctr, (void (*)(const br_block_ctrcbc_class *const *, void *, const void *, size_t)) &br_aes_x86ni_ctrcbc_mac }; #else /* see bearssl_block.h */ const br_block_ctrcbc_class * br_aes_x86ni_ctrcbc_get_vtable(void) { return NULL; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ uint32_t br_chacha20_ct_run(const void *key, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; uint32_t kw[8], ivw[3]; size_t u; static const uint32_t CW[] = { 0x61707865, 0x3320646e, 0x79622d32, 0x6b206574 }; buf = (unsigned char*)data; for (u = 0; u < 8; u ++) { kw[u] = br_dec32le((const unsigned char *)key + (u << 2)); } for (u = 0; u < 3; u ++) { ivw[u] = br_dec32le((const unsigned char *)iv + (u << 2)); } while (len > 0) { uint32_t state[16]; int i; size_t clen; unsigned char tmp[64]; memcpy(&state[0], CW, sizeof CW); memcpy(&state[4], kw, sizeof kw); state[12] = cc; memcpy(&state[13], ivw, sizeof ivw); for (i = 0; i < 10; i ++) { #define QROUND(a, b, c, d) do { \ state[a] += state[b]; \ state[d] ^= state[a]; \ state[d] = (state[d] << 16) | (state[d] >> 16); \ state[c] += state[d]; \ state[b] ^= state[c]; \ state[b] = (state[b] << 12) | (state[b] >> 20); \ state[a] += state[b]; \ state[d] ^= state[a]; \ state[d] = (state[d] << 8) | (state[d] >> 24); \ state[c] += state[d]; \ state[b] ^= state[c]; \ state[b] = (state[b] << 7) | (state[b] >> 25); \ } while (0) QROUND( 0, 4, 8, 12); QROUND( 1, 5, 9, 13); QROUND( 2, 6, 10, 14); QROUND( 3, 7, 11, 15); QROUND( 0, 5, 10, 15); QROUND( 1, 6, 11, 12); QROUND( 2, 7, 8, 13); QROUND( 3, 4, 9, 14); #undef QROUND } for (u = 0; u < 4; u ++) { br_enc32le(&tmp[u << 2], state[u] + CW[u]); } for (u = 4; u < 12; u ++) { br_enc32le(&tmp[u << 2], state[u] + kw[u - 4]); } br_enc32le(&tmp[48], state[12] + cc); for (u = 13; u < 16; u ++) { br_enc32le(&tmp[u << 2], state[u] + ivw[u - 13]); } clen = len < 64 ? len : 64; for (u = 0; u < clen; u ++) { buf[u] ^= tmp[u]; } buf += clen; len -= clen; cc ++; } return cc; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define BR_ENABLE_INTRINSICS 1 #if BR_SSE2 /* * This file contains a ChaCha20 implementation that leverages SSE2 * opcodes for better performance. */ /* see bearssl_block.h */ br_chacha20_run br_chacha20_sse2_get(void) { /* * If using 64-bit mode, then SSE2 opcodes should be automatically * available, since they are part of the ABI. * * In 32-bit mode, we use CPUID to detect the SSE2 feature. */ #if BR_amd64 return &br_chacha20_sse2_run; #else /* * SSE2 support is indicated by bit 26 in EDX. */ if (br_cpuid(0, 0, 0, 0x04000000)) { return &br_chacha20_sse2_run; } else { return 0; } #endif } BR_TARGETS_X86_UP /* see bearssl_block.h */ BR_TARGET("sse2") uint32_t br_chacha20_sse2_run(const void *key, const void *iv, uint32_t cc, void *data, size_t len) { unsigned char *buf; uint32_t ivtmp[4]; __m128i kw0, kw1; __m128i iw, cw; __m128i one; static const uint32_t CW[] = { 0x61707865, 0x3320646e, 0x79622d32, 0x6b206574 }; buf = (unsigned char*)data; kw0 = _mm_loadu_si128((const __m128i_u*)key); kw1 = _mm_loadu_si128((const __m128i_u*)((const unsigned char *)key + 16)); ivtmp[0] = cc; memcpy(ivtmp + 1, iv, 12); iw = _mm_loadu_si128((const __m128i_u*)ivtmp); cw = _mm_loadu_si128((const __m128i_u*)CW); one = _mm_set_epi32(0, 0, 0, 1); while (len > 0) { /* * sj contains state words 4*j to 4*j+3. */ __m128i s0, s1, s2, s3; int i; s0 = cw; s1 = kw0; s2 = kw1; s3 = iw; for (i = 0; i < 10; i ++) { /* * Even round is straightforward application on * the state words. */ s0 = _mm_add_epi32(s0, s1); s3 = _mm_xor_si128(s3, s0); s3 = _mm_or_si128( _mm_slli_epi32(s3, 16), _mm_srli_epi32(s3, 16)); s2 = _mm_add_epi32(s2, s3); s1 = _mm_xor_si128(s1, s2); s1 = _mm_or_si128( _mm_slli_epi32(s1, 12), _mm_srli_epi32(s1, 20)); s0 = _mm_add_epi32(s0, s1); s3 = _mm_xor_si128(s3, s0); s3 = _mm_or_si128( _mm_slli_epi32(s3, 8), _mm_srli_epi32(s3, 24)); s2 = _mm_add_epi32(s2, s3); s1 = _mm_xor_si128(s1, s2); s1 = _mm_or_si128( _mm_slli_epi32(s1, 7), _mm_srli_epi32(s1, 25)); /* * For the odd round, we must rotate some state * words so that the computations apply on the * right combinations of words. */ s1 = _mm_shuffle_epi32(s1, 0x39); s2 = _mm_shuffle_epi32(s2, 0x4E); s3 = _mm_shuffle_epi32(s3, 0x93); s0 = _mm_add_epi32(s0, s1); s3 = _mm_xor_si128(s3, s0); s3 = _mm_or_si128( _mm_slli_epi32(s3, 16), _mm_srli_epi32(s3, 16)); s2 = _mm_add_epi32(s2, s3); s1 = _mm_xor_si128(s1, s2); s1 = _mm_or_si128( _mm_slli_epi32(s1, 12), _mm_srli_epi32(s1, 20)); s0 = _mm_add_epi32(s0, s1); s3 = _mm_xor_si128(s3, s0); s3 = _mm_or_si128( _mm_slli_epi32(s3, 8), _mm_srli_epi32(s3, 24)); s2 = _mm_add_epi32(s2, s3); s1 = _mm_xor_si128(s1, s2); s1 = _mm_or_si128( _mm_slli_epi32(s1, 7), _mm_srli_epi32(s1, 25)); /* * After the odd round, we rotate back the values * to undo the rotate at the start of the odd round. */ s1 = _mm_shuffle_epi32(s1, 0x93); s2 = _mm_shuffle_epi32(s2, 0x4E); s3 = _mm_shuffle_epi32(s3, 0x39); } /* * Addition with the initial state. */ s0 = _mm_add_epi32(s0, cw); s1 = _mm_add_epi32(s1, kw0); s2 = _mm_add_epi32(s2, kw1); s3 = _mm_add_epi32(s3, iw); /* * Increment block counter. */ iw = _mm_add_epi32(iw, one); /* * XOR final state with the data. */ if (len < 64) { unsigned char tmp[64]; size_t u; _mm_storeu_si128((__m128i_u*)(tmp + 0), s0); _mm_storeu_si128((__m128i_u*)(tmp + 16), s1); _mm_storeu_si128((__m128i_u*)(tmp + 32), s2); _mm_storeu_si128((__m128i_u*)(tmp + 48), s3); for (u = 0; u < len; u ++) { buf[u] ^= tmp[u]; } break; } else { __m128i b0, b1, b2, b3; b0 = _mm_loadu_si128((const __m128i_u*)(buf + 0)); b1 = _mm_loadu_si128((const __m128i_u*)(buf + 16)); b2 = _mm_loadu_si128((const __m128i_u*)(buf + 32)); b3 = _mm_loadu_si128((const __m128i_u*)(buf + 48)); b0 = _mm_xor_si128(b0, s0); b1 = _mm_xor_si128(b1, s1); b2 = _mm_xor_si128(b2, s2); b3 = _mm_xor_si128(b3, s3); _mm_storeu_si128((__m128i_u*)(buf + 0), b0); _mm_storeu_si128((__m128i_u*)(buf + 16), b1); _mm_storeu_si128((__m128i_u*)(buf + 32), b2); _mm_storeu_si128((__m128i_u*)(buf + 48), b3); buf += 64; len -= 64; } } /* * _mm_extract_epi32() requires SSE4.1. We prefer to stick to * raw SSE2, thus we use _mm_extract_epi16(). */ return (uint32_t)_mm_extract_epi16(iw, 0) | ((uint32_t)_mm_extract_epi16(iw, 1) << 16); } BR_TARGETS_X86_DOWN #else /* see bearssl_block.h */ br_chacha20_run br_chacha20_sse2_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * During key schedule, we need to apply bit extraction PC-2 then permute * things into our bitslice representation. PC-2 extracts 48 bits out * of two 28-bit words (kl and kr), and we store these bits into two * 32-bit words sk0 and sk1. * * -- bit 16+x of sk0 comes from bit QL0[x] of kl * -- bit x of sk0 comes from bit QR0[x] of kr * -- bit 16+x of sk1 comes from bit QL1[x] of kl * -- bit x of sk1 comes from bit QR1[x] of kr */ static const unsigned char QL0[] = { 17, 4, 27, 23, 13, 22, 7, 18, 16, 24, 2, 20, 1, 8, 15, 26 }; static const unsigned char QR0[] = { 25, 19, 9, 1, 5, 11, 23, 8, 17, 0, 22, 3, 6, 20, 27, 24 }; static const unsigned char QL1[] = { 28, 28, 14, 11, 28, 28, 25, 0, 28, 28, 5, 9, 28, 28, 12, 21 }; static const unsigned char QR1[] = { 28, 28, 15, 4, 28, 28, 26, 16, 28, 28, 12, 7, 28, 28, 10, 14 }; /* * 32-bit rotation. The C compiler is supposed to recognize it as a * rotation and use the local architecture rotation opcode (if available). */ static inline uint32_t Bear_rotl(uint32_t x, int n) { return (x << n) | (x >> (32 - n)); } /* * Compute key schedule for 8 key bytes (produces 32 subkey words). */ static void _src_symcipher_des_ct_ckeysched_unit(uint32_t *skey, const void *key) { int i; br_des_keysched_unit(skey, key); /* * Apply PC-2 + bitslicing. */ for (i = 0; i < 16; i ++) { uint32_t kl, kr, sk0, sk1; int j; kl = skey[(i << 1) + 0]; kr = skey[(i << 1) + 1]; sk0 = 0; sk1 = 0; for (j = 0; j < 16; j ++) { sk0 <<= 1; sk1 <<= 1; sk0 |= ((kl >> QL0[j]) & (uint32_t)1) << 16; sk0 |= (kr >> QR0[j]) & (uint32_t)1; sk1 |= ((kl >> QL1[j]) & (uint32_t)1) << 16; sk1 |= (kr >> QR1[j]) & (uint32_t)1; } skey[(i << 1) + 0] = sk0; skey[(i << 1) + 1] = sk1; } #if 0 /* * Speed-optimized version for PC-2 + bitslicing. * (Unused. Kept for reference only.) */ sk0 = kl & (uint32_t)0x00100000; sk0 |= (kl & (uint32_t)0x08008000) << 2; sk0 |= (kl & (uint32_t)0x00400000) << 4; sk0 |= (kl & (uint32_t)0x00800000) << 5; sk0 |= (kl & (uint32_t)0x00040000) << 6; sk0 |= (kl & (uint32_t)0x00010000) << 7; sk0 |= (kl & (uint32_t)0x00000100) << 10; sk0 |= (kl & (uint32_t)0x00022000) << 14; sk0 |= (kl & (uint32_t)0x00000082) << 18; sk0 |= (kl & (uint32_t)0x00000004) << 19; sk0 |= (kl & (uint32_t)0x04000000) >> 10; sk0 |= (kl & (uint32_t)0x00000010) << 26; sk0 |= (kl & (uint32_t)0x01000000) >> 2; sk0 |= kr & (uint32_t)0x00000100; sk0 |= (kr & (uint32_t)0x00000008) << 1; sk0 |= (kr & (uint32_t)0x00000200) << 4; sk0 |= Bear_rotl(kr & (uint32_t)0x08000021, 6); sk0 |= (kr & (uint32_t)0x01000000) >> 24; sk0 |= (kr & (uint32_t)0x00000002) << 11; sk0 |= (kr & (uint32_t)0x00100000) >> 18; sk0 |= (kr & (uint32_t)0x00400000) >> 17; sk0 |= (kr & (uint32_t)0x00800000) >> 14; sk0 |= (kr & (uint32_t)0x02020000) >> 10; sk0 |= (kr & (uint32_t)0x00080000) >> 5; sk0 |= (kr & (uint32_t)0x00000040) >> 3; sk0 |= (kr & (uint32_t)0x00000800) >> 1; sk1 = kl & (uint32_t)0x02000000; sk1 |= (kl & (uint32_t)0x00001000) << 5; sk1 |= (kl & (uint32_t)0x00000200) << 11; sk1 |= (kl & (uint32_t)0x00004000) << 15; sk1 |= (kl & (uint32_t)0x00000020) << 16; sk1 |= (kl & (uint32_t)0x00000800) << 17; sk1 |= (kl & (uint32_t)0x00000001) << 24; sk1 |= (kl & (uint32_t)0x00200000) >> 5; sk1 |= (kr & (uint32_t)0x00000010) << 8; sk1 |= (kr & (uint32_t)0x04000000) >> 17; sk1 |= (kr & (uint32_t)0x00004000) >> 14; sk1 |= (kr & (uint32_t)0x00000400) >> 9; sk1 |= (kr & (uint32_t)0x00010000) >> 8; sk1 |= (kr & (uint32_t)0x00001000) >> 7; sk1 |= (kr & (uint32_t)0x00000080) >> 3; sk1 |= (kr & (uint32_t)0x00008000) >> 2; #endif } /* see inner.h */ unsigned br_des_ct_keysched(uint32_t *skey, const void *key, size_t key_len) { switch (key_len) { case 8: _src_symcipher_des_ct_ckeysched_unit(skey, key); return 1; case 16: _src_symcipher_des_ct_ckeysched_unit(skey, key); _src_symcipher_des_ct_ckeysched_unit(skey + 32, (const unsigned char *)key + 8); br_des_rev_skey(skey + 32); memcpy(skey + 64, skey, 32 * sizeof *skey); return 3; default: _src_symcipher_des_ct_ckeysched_unit(skey, key); _src_symcipher_des_ct_ckeysched_unit(skey + 32, (const unsigned char *)key + 8); br_des_rev_skey(skey + 32); _src_symcipher_des_ct_ckeysched_unit(skey + 64, (const unsigned char *)key + 16); return 3; } } /* * DES confusion function. This function performs expansion E (32 to * 48 bits), XOR with subkey, S-boxes, and permutation P. */ static inline uint32_t _src_symcipher_des_ct_cFconf(uint32_t r0, const uint32_t *sk) { /* * Each 6->4 S-box is virtually turned into four 6->1 boxes; we * thus end up with 32 boxes that we call "T-boxes" here. We will * evaluate them with bitslice code. * * Each T-box is a circuit of multiplexers (sort of) and thus * takes 70 inputs: the 6 actual T-box inputs, and 64 constants * that describe the T-box output for all combinations of the * 6 inputs. With this model, all T-boxes are identical (with * distinct inputs) and thus can be executed in parallel with * bitslice code. * * T-boxes are numbered from 0 to 31, in least-to-most * significant order. Thus, S-box S1 corresponds to T-boxes 31, * 30, 29 and 28, in that order. T-box 'n' is computed with the * bits at rank 'n' in the 32-bit words. * * Words x0 to x5 contain the T-box inputs 0 to 5. */ uint32_t x0, x1, x2, x3, x4, x5, z0; uint32_t y0, y1, y2, y3, y4, y5, y6, y7, y8, y9; uint32_t y10, y11, y12, y13, y14, y15, y16, y17, y18, y19; uint32_t y20, y21, y22, y23, y24, y25, y26, y27, y28, y29; uint32_t y30; /* * Spread input bits over the 6 input words x*. */ x1 = r0 & (uint32_t)0x11111111; x2 = (r0 >> 1) & (uint32_t)0x11111111; x3 = (r0 >> 2) & (uint32_t)0x11111111; x4 = (r0 >> 3) & (uint32_t)0x11111111; x1 = (x1 << 4) - x1; x2 = (x2 << 4) - x2; x3 = (x3 << 4) - x3; x4 = (x4 << 4) - x4; x0 = (x4 << 4) | (x4 >> 28); x5 = (x1 >> 4) | (x1 << 28); /* * XOR with the subkey for this round. */ x0 ^= sk[0]; x1 ^= sk[1]; x2 ^= sk[2]; x3 ^= sk[3]; x4 ^= sk[4]; x5 ^= sk[5]; /* * The T-boxes are done in parallel, since they all use a * "tree of multiplexer". We use "fake multiplexers": * * y = a ^ (x & b) * * computes y as either 'a' (if x == 0) or 'a ^ b' (if x == 1). */ y0 = (uint32_t)0xEFA72C4D ^ (x0 & (uint32_t)0xEC7AC69C); y1 = (uint32_t)0xAEAAEDFF ^ (x0 & (uint32_t)0x500FB821); y2 = (uint32_t)0x37396665 ^ (x0 & (uint32_t)0x40EFA809); y3 = (uint32_t)0x68D7B833 ^ (x0 & (uint32_t)0xA5EC0B28); y4 = (uint32_t)0xC9C755BB ^ (x0 & (uint32_t)0x252CF820); y5 = (uint32_t)0x73FC3606 ^ (x0 & (uint32_t)0x40205801); y6 = (uint32_t)0xA2A0A918 ^ (x0 & (uint32_t)0xE220F929); y7 = (uint32_t)0x8222BD90 ^ (x0 & (uint32_t)0x44A3F9E1); y8 = (uint32_t)0xD6B6AC77 ^ (x0 & (uint32_t)0x794F104A); y9 = (uint32_t)0x3069300C ^ (x0 & (uint32_t)0x026F320B); y10 = (uint32_t)0x6CE0D5CC ^ (x0 & (uint32_t)0x7640B01A); y11 = (uint32_t)0x59A9A22D ^ (x0 & (uint32_t)0x238F1572); y12 = (uint32_t)0xAC6D0BD4 ^ (x0 & (uint32_t)0x7A63C083); y13 = (uint32_t)0x21C83200 ^ (x0 & (uint32_t)0x11CCA000); y14 = (uint32_t)0xA0E62188 ^ (x0 & (uint32_t)0x202F69AA); /* y15 = (uint32_t)0x00000000 ^ (x0 & (uint32_t)0x00000000); */ y16 = (uint32_t)0xAF7D655A ^ (x0 & (uint32_t)0x51B33BE9); y17 = (uint32_t)0xF0168AA3 ^ (x0 & (uint32_t)0x3B0FE8AE); y18 = (uint32_t)0x90AA30C6 ^ (x0 & (uint32_t)0x90BF8816); y19 = (uint32_t)0x5AB2750A ^ (x0 & (uint32_t)0x09E34F9B); y20 = (uint32_t)0x5391BE65 ^ (x0 & (uint32_t)0x0103BE88); y21 = (uint32_t)0x93372BAF ^ (x0 & (uint32_t)0x49AC8E25); y22 = (uint32_t)0xF288210C ^ (x0 & (uint32_t)0x922C313D); y23 = (uint32_t)0x920AF5C0 ^ (x0 & (uint32_t)0x70EF31B0); y24 = (uint32_t)0x63D312C0 ^ (x0 & (uint32_t)0x6A707100); y25 = (uint32_t)0x537B3006 ^ (x0 & (uint32_t)0xB97C9011); y26 = (uint32_t)0xA2EFB0A5 ^ (x0 & (uint32_t)0xA320C959); y27 = (uint32_t)0xBC8F96A5 ^ (x0 & (uint32_t)0x6EA0AB4A); y28 = (uint32_t)0xFAD176A5 ^ (x0 & (uint32_t)0x6953DDF8); y29 = (uint32_t)0x665A14A3 ^ (x0 & (uint32_t)0xF74F3E2B); y30 = (uint32_t)0xF2EFF0CC ^ (x0 & (uint32_t)0xF0306CAD); /* y31 = (uint32_t)0x00000000 ^ (x0 & (uint32_t)0x00000000); */ y0 = y0 ^ (x1 & y1); y1 = y2 ^ (x1 & y3); y2 = y4 ^ (x1 & y5); y3 = y6 ^ (x1 & y7); y4 = y8 ^ (x1 & y9); y5 = y10 ^ (x1 & y11); y6 = y12 ^ (x1 & y13); y7 = y14; /* was: y14 ^ (x1 & y15) */ y8 = y16 ^ (x1 & y17); y9 = y18 ^ (x1 & y19); y10 = y20 ^ (x1 & y21); y11 = y22 ^ (x1 & y23); y12 = y24 ^ (x1 & y25); y13 = y26 ^ (x1 & y27); y14 = y28 ^ (x1 & y29); y15 = y30; /* was: y30 ^ (x1 & y31) */ y0 = y0 ^ (x2 & y1); y1 = y2 ^ (x2 & y3); y2 = y4 ^ (x2 & y5); y3 = y6 ^ (x2 & y7); y4 = y8 ^ (x2 & y9); y5 = y10 ^ (x2 & y11); y6 = y12 ^ (x2 & y13); y7 = y14 ^ (x2 & y15); y0 = y0 ^ (x3 & y1); y1 = y2 ^ (x3 & y3); y2 = y4 ^ (x3 & y5); y3 = y6 ^ (x3 & y7); y0 = y0 ^ (x4 & y1); y1 = y2 ^ (x4 & y3); y0 = y0 ^ (x5 & y1); /* * The P permutation: * -- Each bit move is converted into a mask + left rotation. * -- Rotations that use the same movement are coalesced together. * -- Left and right shifts are used as alternatives to a rotation * where appropriate (this will help architectures that do not have * a rotation opcode). */ z0 = (y0 & (uint32_t)0x00000004) << 3; z0 |= (y0 & (uint32_t)0x00004000) << 4; z0 |= Bear_rotl(y0 & 0x12020120, 5); z0 |= (y0 & (uint32_t)0x00100000) << 6; z0 |= (y0 & (uint32_t)0x00008000) << 9; z0 |= (y0 & (uint32_t)0x04000000) >> 22; z0 |= (y0 & (uint32_t)0x00000001) << 11; z0 |= Bear_rotl(y0 & 0x20000200, 12); z0 |= (y0 & (uint32_t)0x00200000) >> 19; z0 |= (y0 & (uint32_t)0x00000040) << 14; z0 |= (y0 & (uint32_t)0x00010000) << 15; z0 |= (y0 & (uint32_t)0x00000002) << 16; z0 |= Bear_rotl(y0 & 0x40801800, 17); z0 |= (y0 & (uint32_t)0x00080000) >> 13; z0 |= (y0 & (uint32_t)0x00000010) << 21; z0 |= (y0 & (uint32_t)0x01000000) >> 10; z0 |= Bear_rotl(y0 & 0x88000008, 24); z0 |= (y0 & (uint32_t)0x00000480) >> 7; z0 |= (y0 & (uint32_t)0x00442000) >> 6; return z0; } /* * Process one block through 16 successive rounds, omitting the swap * in the final round. */ static void _src_symcipher_des_ct_cprocess_block_unit(uint32_t *pl, uint32_t *pr, const uint32_t *sk_exp) { int i; uint32_t l, r; l = *pl; r = *pr; for (i = 0; i < 16; i ++) { uint32_t t; t = l ^ _src_symcipher_des_ct_cFconf(r, sk_exp); l = r; r = t; sk_exp += 6; } *pl = r; *pr = l; } /* see inner.h */ void br_des_ct_process_block(unsigned num_rounds, const uint32_t *sk_exp, void *block) { unsigned char *buf; uint32_t l, r; buf = (unsigned char*)block; l = br_dec32be(buf); r = br_dec32be(buf + 4); br_des_do_IP(&l, &r); while (num_rounds -- > 0) { _src_symcipher_des_ct_cprocess_block_unit(&l, &r, sk_exp); sk_exp += 96; } br_des_do_invIP(&l, &r); br_enc32be(buf, l); br_enc32be(buf + 4, r); } /* see inner.h */ void br_des_ct_skey_expand(uint32_t *sk_exp, unsigned num_rounds, const uint32_t *skey) { num_rounds <<= 4; while (num_rounds -- > 0) { uint32_t v, w0, w1, w2, w3; v = *skey ++; w0 = v & 0x11111111; w1 = (v >> 1) & 0x11111111; w2 = (v >> 2) & 0x11111111; w3 = (v >> 3) & 0x11111111; *sk_exp ++ = (w0 << 4) - w0; *sk_exp ++ = (w1 << 4) - w1; *sk_exp ++ = (w2 << 4) - w2; *sk_exp ++ = (w3 << 4) - w3; v = *skey ++; w0 = v & 0x11111111; w1 = (v >> 1) & 0x11111111; *sk_exp ++ = (w0 << 4) - w0; *sk_exp ++ = (w1 << 4) - w1; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_des_ct_cbcdec_init(br_des_ct_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_des_ct_cbcdec_vtable; ctx->num_rounds = br_des_ct_keysched(ctx->skey, key, len); if (len == 8) { br_des_rev_skey(ctx->skey); } else { int i; for (i = 0; i < 48; i += 2) { uint32_t t; t = ctx->skey[i]; ctx->skey[i] = ctx->skey[94 - i]; ctx->skey[94 - i] = t; t = ctx->skey[i + 1]; ctx->skey[i + 1] = ctx->skey[95 - i]; ctx->skey[95 - i] = t; } } } /* see bearssl_block.h */ void br_des_ct_cbcdec_run(const br_des_ct_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; uint32_t sk_exp[288]; br_des_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[8]; int i; memcpy(tmp, buf, 8); br_des_ct_process_block(ctx->num_rounds, sk_exp, buf); for (i = 0; i < 8; i ++) { buf[i] ^= ivbuf[i]; } memcpy(ivbuf, tmp, 8); buf += 8; len -= 8; } } /* see bearssl_block.h */ const br_block_cbcdec_class br_des_ct_cbcdec_vtable = { sizeof(br_des_ct_cbcdec_keys), 8, 3, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_des_ct_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_des_ct_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_des_ct_cbcenc_init(br_des_ct_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_des_ct_cbcenc_vtable; ctx->num_rounds = br_des_ct_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_des_ct_cbcenc_run(const br_des_ct_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; uint32_t sk_exp[288]; br_des_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey); ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { int i; for (i = 0; i < 8; i ++) { buf[i] ^= ivbuf[i]; } br_des_ct_process_block(ctx->num_rounds, sk_exp, buf); memcpy(ivbuf, buf, 8); buf += 8; len -= 8; } } /* see bearssl_block.h */ const br_block_cbcenc_class br_des_ct_cbcenc_vtable = { sizeof(br_des_ct_cbcenc_keys), 8, 3, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_des_ct_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_des_ct_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ void br_des_do_IP(uint32_t *xl, uint32_t *xr) { /* * Permutation algorithm is initially from Richard Outerbridge; * implementation here is adapted from Crypto++ "des.cpp" file * (which is in public domain). */ uint32_t l, r, t; l = *xl; r = *xr; t = ((l >> 4) ^ r) & (uint32_t)0x0F0F0F0F; r ^= t; l ^= t << 4; t = ((l >> 16) ^ r) & (uint32_t)0x0000FFFF; r ^= t; l ^= t << 16; t = ((r >> 2) ^ l) & (uint32_t)0x33333333; l ^= t; r ^= t << 2; t = ((r >> 8) ^ l) & (uint32_t)0x00FF00FF; l ^= t; r ^= t << 8; t = ((l >> 1) ^ r) & (uint32_t)0x55555555; r ^= t; l ^= t << 1; *xl = l; *xr = r; } /* see inner.h */ void br_des_do_invIP(uint32_t *xl, uint32_t *xr) { /* * See br_des_do_IP(). */ uint32_t l, r, t; l = *xl; r = *xr; t = ((l >> 1) ^ r) & 0x55555555; r ^= t; l ^= t << 1; t = ((r >> 8) ^ l) & 0x00FF00FF; l ^= t; r ^= t << 8; t = ((r >> 2) ^ l) & 0x33333333; l ^= t; r ^= t << 2; t = ((l >> 16) ^ r) & 0x0000FFFF; r ^= t; l ^= t << 16; t = ((l >> 4) ^ r) & 0x0F0F0F0F; r ^= t; l ^= t << 4; *xl = l; *xr = r; } /* see inner.h */ void br_des_keysched_unit(uint32_t *skey, const void *key) { uint32_t xl, xr, kl, kr; int i; xl = br_dec32be(key); xr = br_dec32be((const unsigned char *)key + 4); /* * Permutation PC-1 is quite similar to the IP permutation. * Definition of IP (in FIPS 46-3 notations) is: * 58 50 42 34 26 18 10 2 * 60 52 44 36 28 20 12 4 * 62 54 46 38 30 22 14 6 * 64 56 48 40 32 24 16 8 * 57 49 41 33 25 17 9 1 * 59 51 43 35 27 19 11 3 * 61 53 45 37 29 21 13 5 * 63 55 47 39 31 23 15 7 * * Definition of PC-1 is: * 57 49 41 33 25 17 9 1 * 58 50 42 34 26 18 10 2 * 59 51 43 35 27 19 11 3 * 60 52 44 36 * 63 55 47 39 31 23 15 7 * 62 54 46 38 30 22 14 6 * 61 53 45 37 29 21 13 5 * 28 20 12 4 */ br_des_do_IP(&xl, &xr); kl = ((xr & (uint32_t)0xFF000000) >> 4) | ((xl & (uint32_t)0xFF000000) >> 12) | ((xr & (uint32_t)0x00FF0000) >> 12) | ((xl & (uint32_t)0x00FF0000) >> 20); kr = ((xr & (uint32_t)0x000000FF) << 20) | ((xl & (uint32_t)0x0000FF00) << 4) | ((xr & (uint32_t)0x0000FF00) >> 4) | ((xl & (uint32_t)0x000F0000) >> 16); /* * For each round, rotate the two 28-bit words kl and kr. * The extraction of the 48-bit subkey (PC-2) is not done yet. */ for (i = 0; i < 16; i ++) { if ((1 << i) & 0x8103) { kl = (kl << 1) | (kl >> 27); kr = (kr << 1) | (kr >> 27); } else { kl = (kl << 2) | (kl >> 26); kr = (kr << 2) | (kr >> 26); } kl &= (uint32_t)0x0FFFFFFF; kr &= (uint32_t)0x0FFFFFFF; skey[(i << 1) + 0] = kl; skey[(i << 1) + 1] = kr; } } /* see inner.h */ void br_des_rev_skey(uint32_t *skey) { int i; for (i = 0; i < 16; i += 2) { uint32_t t; t = skey[i + 0]; skey[i + 0] = skey[30 - i]; skey[30 - i] = t; t = skey[i + 1]; skey[i + 1] = skey[31 - i]; skey[31 - i] = t; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * PC2left[x] tells where bit x goes when applying PC-2. 'x' is a bit * position in the left rotated key word. Both position are in normal * order (rightmost bit is 0). */ static const unsigned char PC2left[] = { 16, 3, 7, 24, 20, 11, 24, 13, 2, 10, 24, 22, 5, 15, 23, 1, 9, 21, 12, 24, 6, 4, 14, 18, 8, 17, 0, 19 }; /* * Similar to PC2left[x], for the right rotated key word. */ static const unsigned char PC2right[] = { 8, 18, 24, 6, 22, 15, 3, 10, 12, 19, 5, 14, 11, 24, 4, 23, 16, 9, 24, 20, 2, 24, 7, 13, 0, 21, 17, 1 }; /* * S-boxes and PC-1 merged. */ static const uint32_t S1[] = { 0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000, 0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002, 0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202, 0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000, 0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200, 0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202, 0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200, 0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002 }; static const uint32_t S2[] = { 0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010, 0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010, 0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000, 0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010, 0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000, 0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000, 0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010, 0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000 }; static const uint32_t S3[] = { 0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100, 0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104, 0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104, 0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000, 0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000, 0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004, 0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004, 0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100 }; static const uint32_t S4[] = { 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000, 0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000, 0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040, 0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040, 0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000, 0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040, 0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040 }; static const uint32_t S5[] = { 0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000, 0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000, 0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080, 0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080, 0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080, 0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000, 0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000, 0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080 }; static const uint32_t S6[] = { 0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000, 0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008, 0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008, 0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000, 0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008, 0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000, 0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008, 0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008 }; static const uint32_t S7[] = { 0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400, 0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401, 0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001, 0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400, 0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001, 0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400, 0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401, 0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001 }; static const uint32_t S8[] = { 0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000, 0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020, 0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800, 0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000, 0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820, 0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820, 0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000, 0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800 }; static inline uint32_t _src_symcipher_des_tab_cFconf(uint32_t r0, uint32_t skl, uint32_t skr) { uint32_t r1; r1 = (r0 << 16) | (r0 >> 16); return S1[((r1 >> 11) ^ (skl >> 18)) & 0x3F] | S2[((r0 >> 23) ^ (skl >> 12)) & 0x3F] | S3[((r0 >> 19) ^ (skl >> 6)) & 0x3F] | S4[((r0 >> 15) ^ (skl )) & 0x3F] | S5[((r0 >> 11) ^ (skr >> 18)) & 0x3F] | S6[((r0 >> 7) ^ (skr >> 12)) & 0x3F] | S7[((r0 >> 3) ^ (skr >> 6)) & 0x3F] | S8[((r1 >> 15) ^ (skr )) & 0x3F]; } static void _src_symcipher_des_tab_cprocess_block_unit(uint32_t *pl, uint32_t *pr, const uint32_t *skey) { int i; uint32_t l, r; l = *pl; r = *pr; for (i = 0; i < 16; i ++) { uint32_t t; t = l ^ _src_symcipher_des_tab_cFconf(r, skey[(i << 1) + 0], skey[(i << 1) + 1]); l = r; r = t; } *pl = r; *pr = l; } /* see inner.h */ void br_des_tab_process_block(unsigned num_rounds, const uint32_t *skey, void *block) { unsigned char *buf; uint32_t l, r; buf = (unsigned char*)block; l = br_dec32be(buf); r = br_dec32be(buf + 4); br_des_do_IP(&l, &r); while (num_rounds -- > 0) { _src_symcipher_des_tab_cprocess_block_unit(&l, &r, skey); skey += 32; } br_des_do_invIP(&l, &r); br_enc32be(buf, l); br_enc32be(buf + 4, r); } static void _src_symcipher_des_tab_ckeysched_unit(uint32_t *skey, const void *key) { int i; br_des_keysched_unit(skey, key); /* * Apply PC-2 to get the 48-bit subkeys. */ for (i = 0; i < 16; i ++) { uint32_t xl, xr, ul, ur; int j; xl = skey[(i << 1) + 0]; xr = skey[(i << 1) + 1]; ul = 0; ur = 0; for (j = 0; j < 28; j ++) { ul |= (xl & 1) << PC2left[j]; ur |= (xr & 1) << PC2right[j]; xl >>= 1; xr >>= 1; } skey[(i << 1) + 0] = ul; skey[(i << 1) + 1] = ur; } } /* see inner.h */ unsigned br_des_tab_keysched(uint32_t *skey, const void *key, size_t key_len) { switch (key_len) { case 8: _src_symcipher_des_tab_ckeysched_unit(skey, key); return 1; case 16: _src_symcipher_des_tab_ckeysched_unit(skey, key); _src_symcipher_des_tab_ckeysched_unit(skey + 32, (const unsigned char *)key + 8); br_des_rev_skey(skey + 32); memcpy(skey + 64, skey, 32 * sizeof *skey); return 3; default: _src_symcipher_des_tab_ckeysched_unit(skey, key); _src_symcipher_des_tab_ckeysched_unit(skey + 32, (const unsigned char *)key + 8); br_des_rev_skey(skey + 32); _src_symcipher_des_tab_ckeysched_unit(skey + 64, (const unsigned char *)key + 16); return 3; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_des_tab_cbcdec_init(br_des_tab_cbcdec_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_des_tab_cbcdec_vtable; ctx->num_rounds = br_des_tab_keysched(ctx->skey, key, len); if (len == 8) { br_des_rev_skey(ctx->skey); } else { int i; for (i = 0; i < 48; i += 2) { uint32_t t; t = ctx->skey[i]; ctx->skey[i] = ctx->skey[94 - i]; ctx->skey[94 - i] = t; t = ctx->skey[i + 1]; ctx->skey[i + 1] = ctx->skey[95 - i]; ctx->skey[95 - i] = t; } } } /* see bearssl_block.h */ void br_des_tab_cbcdec_run(const br_des_tab_cbcdec_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[8]; int i; memcpy(tmp, buf, 8); br_des_tab_process_block(ctx->num_rounds, ctx->skey, buf); for (i = 0; i < 8; i ++) { buf[i] ^= ivbuf[i]; } memcpy(ivbuf, tmp, 8); buf += 8; len -= 8; } } /* see bearssl_block.h */ const br_block_cbcdec_class br_des_tab_cbcdec_vtable = { sizeof(br_des_tab_cbcdec_keys), 8, 3, (void (*)(const br_block_cbcdec_class **, const void *, size_t)) &br_des_tab_cbcdec_init, (void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t)) &br_des_tab_cbcdec_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_block.h */ void br_des_tab_cbcenc_init(br_des_tab_cbcenc_keys *ctx, const void *key, size_t len) { ctx->vtable = &br_des_tab_cbcenc_vtable; ctx->num_rounds = br_des_tab_keysched(ctx->skey, key, len); } /* see bearssl_block.h */ void br_des_tab_cbcenc_run(const br_des_tab_cbcenc_keys *ctx, void *iv, void *data, size_t len) { unsigned char *buf, *ivbuf; ivbuf = (unsigned char *)iv; buf = (unsigned char*)data; while (len > 0) { int i; for (i = 0; i < 8; i ++) { buf[i] ^= ivbuf[i]; } br_des_tab_process_block(ctx->num_rounds, ctx->skey, buf); memcpy(ivbuf, buf, 8); buf += 8; len -= 8; } } /* see bearssl_block.h */ const br_block_cbcenc_class br_des_tab_cbcenc_vtable = { sizeof(br_des_tab_cbcenc_keys), 8, 3, (void (*)(const br_block_cbcenc_class **, const void *, size_t)) &br_des_tab_cbcenc_init, (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) &br_des_tab_cbcenc_run }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Perform the inner processing of blocks for Poly1305. The accumulator * and the r key are provided as arrays of 26-bit words (these words * are allowed to have an extra bit, i.e. use 27 bits). * * On output, all accumulator words fit on 26 bits, except acc[1], which * may be slightly larger (but by a very small amount only). */ static void _src_symcipher_poly1305_ctmul_cpoly1305_inner(uint32_t *acc, const uint32_t *r, const void *data, size_t len) { /* * Implementation notes: we split the 130-bit values into five * 26-bit words. This gives us some space for carries. * * This code is inspired from the public-domain code available * on: * https://github.com/floodyberry/poly1305-donna * * Since we compute modulo 2^130-5, the "upper words" become * low words with a factor of 5; that is, x*2^130 = x*5 mod p. */ const unsigned char *buf; uint32_t a0, a1, a2, a3, a4; uint32_t r0, r1, r2, r3, r4; uint32_t u1, u2, u3, u4; r0 = r[0]; r1 = r[1]; r2 = r[2]; r3 = r[3]; r4 = r[4]; u1 = r1 * 5; u2 = r2 * 5; u3 = r3 * 5; u4 = r4 * 5; a0 = acc[0]; a1 = acc[1]; a2 = acc[2]; a3 = acc[3]; a4 = acc[4]; buf = (unsigned char*)data; while (len > 0) { uint64_t w0, w1, w2, w3, w4; uint64_t c; unsigned char tmp[16]; /* * If there is a partial block, right-pad it with zeros. */ if (len < 16) { memset(tmp, 0, sizeof tmp); memcpy(tmp, buf, len); buf = tmp; len = 16; } /* * Decode next block and apply the "high bit"; that value * is added to the accumulator. */ a0 += br_dec32le(buf) & 0x03FFFFFF; a1 += (br_dec32le(buf + 3) >> 2) & 0x03FFFFFF; a2 += (br_dec32le(buf + 6) >> 4) & 0x03FFFFFF; a3 += (br_dec32le(buf + 9) >> 6) & 0x03FFFFFF; a4 += (br_dec32le(buf + 12) >> 8) | 0x01000000; /* * Compute multiplication. */ #define M(x, y) ((uint64_t)(x) * (uint64_t)(y)) w0 = M(a0, r0) + M(a1, u4) + M(a2, u3) + M(a3, u2) + M(a4, u1); w1 = M(a0, r1) + M(a1, r0) + M(a2, u4) + M(a3, u3) + M(a4, u2); w2 = M(a0, r2) + M(a1, r1) + M(a2, r0) + M(a3, u4) + M(a4, u3); w3 = M(a0, r3) + M(a1, r2) + M(a2, r1) + M(a3, r0) + M(a4, u4); w4 = M(a0, r4) + M(a1, r3) + M(a2, r2) + M(a3, r1) + M(a4, r0); #undef M /* * Perform some (partial) modular reduction. This step is * enough to keep values in ranges such that there won't * be carry overflows. Most of the reduction was done in * the multiplication step (by using the 'u*' values, and * using the fact that 2^130 = -5 mod p); here we perform * some carry propagation. */ c = w0 >> 26; a0 = (uint32_t)w0 & 0x3FFFFFF; w1 += c; c = w1 >> 26; a1 = (uint32_t)w1 & 0x3FFFFFF; w2 += c; c = w2 >> 26; a2 = (uint32_t)w2 & 0x3FFFFFF; w3 += c; c = w3 >> 26; a3 = (uint32_t)w3 & 0x3FFFFFF; w4 += c; c = w4 >> 26; a4 = (uint32_t)w4 & 0x3FFFFFF; a0 += (uint32_t)c * 5; a1 += a0 >> 26; a0 &= 0x3FFFFFF; buf += 16; len -= 16; } acc[0] = a0; acc[1] = a1; acc[2] = a2; acc[3] = a3; acc[4] = a4; } /* see bearssl_block.h */ void br_poly1305_ctmul_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt) { unsigned char pkey[32], foot[16]; uint32_t r[5], acc[5], cc, ctl, hi; uint64_t w; int i; /* * Compute the MAC key. The 'r' value is the first 16 bytes of * pkey[]. */ memset(pkey, 0, sizeof pkey); ichacha(key, iv, 0, pkey, sizeof pkey); /* * If encrypting, ChaCha20 must run first, followed by Poly1305. * When decrypting, the operations are reversed. */ if (encrypt) { ichacha(key, iv, 1, data, len); } /* * Run Poly1305. We must process the AAD, then ciphertext, then * the footer (with the lengths). Note that the AAD and ciphertext * are meant to be padded with zeros up to the next multiple of 16, * and the length of the footer is 16 bytes as well. */ /* * Decode the 'r' value into 26-bit words, with the "clamping" * operation applied. */ r[0] = br_dec32le(pkey) & 0x03FFFFFF; r[1] = (br_dec32le(pkey + 3) >> 2) & 0x03FFFF03; r[2] = (br_dec32le(pkey + 6) >> 4) & 0x03FFC0FF; r[3] = (br_dec32le(pkey + 9) >> 6) & 0x03F03FFF; r[4] = (br_dec32le(pkey + 12) >> 8) & 0x000FFFFF; /* * Accumulator is 0. */ memset(acc, 0, sizeof acc); /* * Process the additional authenticated data, ciphertext, and * footer in due order. */ br_enc64le(foot, (uint64_t)aad_len); br_enc64le(foot + 8, (uint64_t)len); _src_symcipher_poly1305_ctmul_cpoly1305_inner(acc, r, aad, aad_len); _src_symcipher_poly1305_ctmul_cpoly1305_inner(acc, r, data, len); _src_symcipher_poly1305_ctmul_cpoly1305_inner(acc, r, foot, sizeof foot); /* * Finalise modular reduction. This is done with carry propagation * and applying the '2^130 = -5 mod p' rule. Note that the output * of poly1035_inner() is already mostly reduced, since only * acc[1] may be (very slightly) above 2^26. A single loop back * to acc[1] will be enough to make the value fit in 130 bits. */ cc = 0; for (i = 1; i <= 6; i ++) { int j; j = (i >= 5) ? i - 5 : i; acc[j] += cc; cc = acc[j] >> 26; acc[j] &= 0x03FFFFFF; } /* * We may still have a value in the 2^130-5..2^130-1 range, in * which case we must reduce it again. The code below selects, * in constant-time, between 'acc' and 'acc-p', */ ctl = GT(acc[0], 0x03FFFFFA); for (i = 1; i < 5; i ++) { ctl &= EQ(acc[i], 0x03FFFFFF); } cc = 5; for (i = 0; i < 5; i ++) { uint32_t t; t = (acc[i] + cc); cc = t >> 26; t &= 0x03FFFFFF; acc[i] = MUX(ctl, t, acc[i]); } /* * Convert back the accumulator to 32-bit words, and add the * 's' value (second half of pkey[]). That addition is done * modulo 2^128. */ w = (uint64_t)acc[0] + ((uint64_t)acc[1] << 26) + br_dec32le(pkey + 16); br_enc32le((unsigned char *)tag, (uint32_t)w); w = (w >> 32) + ((uint64_t)acc[2] << 20) + br_dec32le(pkey + 20); br_enc32le((unsigned char *)tag + 4, (uint32_t)w); w = (w >> 32) + ((uint64_t)acc[3] << 14) + br_dec32le(pkey + 24); br_enc32le((unsigned char *)tag + 8, (uint32_t)w); hi = (uint32_t)(w >> 32) + (acc[4] << 8) + br_dec32le(pkey + 28); br_enc32le((unsigned char *)tag + 12, hi); /* * If decrypting, then ChaCha20 runs _after_ Poly1305. */ if (!encrypt) { ichacha(key, iv, 1, data, len); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * Perform the inner processing of blocks for Poly1305. */ static void _src_symcipher_poly1305_ctmul32_cpoly1305_inner(uint32_t *a, const uint32_t *r, const void *data, size_t len) { /* * Implementation notes: we split the 130-bit values into ten * 13-bit words. This gives us some space for carries and allows * using only 32x32->32 multiplications, which are way faster than * 32x32->64 multiplications on the ARM Cortex-M0/M0+, and also * help in making constant-time code on the Cortex-M3. * * Since we compute modulo 2^130-5, the "upper words" become * low words with a factor of 5; that is, x*2^130 = x*5 mod p. * This has already been integrated in the r[] array, which * is extended to the 0..18 range. * * In each loop iteration, a[] and r[] words are 13-bit each, * except a[1] which may use 14 bits. */ const unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16]; uint32_t b[10]; unsigned u, v; uint32_t z, cc1, cc2; /* * If there is a partial block, right-pad it with zeros. */ if (len < 16) { memset(tmp, 0, sizeof tmp); memcpy(tmp, buf, len); buf = tmp; len = 16; } /* * Decode next block and apply the "high bit"; that value * is added to the accumulator. */ v = br_dec16le(buf); a[0] += v & 0x01FFF; v >>= 13; v |= buf[2] << 3; v |= buf[3] << 11; a[1] += v & 0x01FFF; v >>= 13; v |= buf[4] << 6; a[2] += v & 0x01FFF; v >>= 13; v |= buf[5] << 1; v |= buf[6] << 9; a[3] += v & 0x01FFF; v >>= 13; v |= buf[7] << 4; v |= buf[8] << 12; a[4] += v & 0x01FFF; v >>= 13; v |= buf[9] << 7; a[5] += v & 0x01FFF; v >>= 13; v |= buf[10] << 2; v |= buf[11] << 10; a[6] += v & 0x01FFF; v >>= 13; v |= buf[12] << 5; a[7] += v & 0x01FFF; v = br_dec16le(buf + 13); a[8] += v & 0x01FFF; v >>= 13; v |= buf[15] << 3; a[9] += v | 0x00800; /* * At that point, all a[] values fit on 14 bits, while * all r[] values fit on 13 bits. Thus products fit on * 27 bits, and we can accumulate up to 31 of them in * a 32-bit word and still have some room for carries. */ /* * Now a[] contains words with values up to 14 bits each. * We perform the multiplication with r[]. * * The extended words of r[] may be larger than 13 bits * (they are 5 times a 13-bit word) so the full summation * may yield values up to 46 times a 27-bit word, which * does not fit on a 32-bit word. To avoid that issue, we * must split the loop below in two, with a carry * propagation operation in the middle. */ cc1 = 0; for (u = 0; u < 10; u ++) { uint32_t s; s = cc1 + MUL15(a[0], r[u + 9 - 0]) + MUL15(a[1], r[u + 9 - 1]) + MUL15(a[2], r[u + 9 - 2]) + MUL15(a[3], r[u + 9 - 3]) + MUL15(a[4], r[u + 9 - 4]); b[u] = s & 0x1FFF; cc1 = s >> 13; } cc2 = 0; for (u = 0; u < 10; u ++) { uint32_t s; s = b[u] + cc2 + MUL15(a[5], r[u + 9 - 5]) + MUL15(a[6], r[u + 9 - 6]) + MUL15(a[7], r[u + 9 - 7]) + MUL15(a[8], r[u + 9 - 8]) + MUL15(a[9], r[u + 9 - 9]); b[u] = s & 0x1FFF; cc2 = s >> 13; } memcpy(a, b, sizeof b); /* * The two carries "loop back" with a factor of 5. We * propagate them into a[0] and a[1]. */ z = cc1 + cc2; z += (z << 2) + a[0]; a[0] = z & 0x1FFF; a[1] += z >> 13; buf += 16; len -= 16; } } /* see bearssl_block.h */ void br_poly1305_ctmul32_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt) { unsigned char pkey[32], foot[16]; uint32_t z, r[19], acc[10], cc, ctl; int i; /* * Compute the MAC key. The 'r' value is the first 16 bytes of * pkey[]. */ memset(pkey, 0, sizeof pkey); ichacha(key, iv, 0, pkey, sizeof pkey); /* * If encrypting, ChaCha20 must run first, followed by Poly1305. * When decrypting, the operations are reversed. */ if (encrypt) { ichacha(key, iv, 1, data, len); } /* * Run Poly1305. We must process the AAD, then ciphertext, then * the footer (with the lengths). Note that the AAD and ciphertext * are meant to be padded with zeros up to the next multiple of 16, * and the length of the footer is 16 bytes as well. */ /* * Decode the 'r' value into 13-bit words, with the "clamping" * operation applied. */ z = br_dec32le(pkey) & 0x03FFFFFF; r[9] = z & 0x1FFF; r[10] = z >> 13; z = (br_dec32le(pkey + 3) >> 2) & 0x03FFFF03; r[11] = z & 0x1FFF; r[12] = z >> 13; z = (br_dec32le(pkey + 6) >> 4) & 0x03FFC0FF; r[13] = z & 0x1FFF; r[14] = z >> 13; z = (br_dec32le(pkey + 9) >> 6) & 0x03F03FFF; r[15] = z & 0x1FFF; r[16] = z >> 13; z = (br_dec32le(pkey + 12) >> 8) & 0x000FFFFF; r[17] = z & 0x1FFF; r[18] = z >> 13; /* * Extend r[] with the 5x factor pre-applied. */ for (i = 0; i < 9; i ++) { r[i] = MUL15(5, r[i + 10]); } /* * Accumulator is 0. */ memset(acc, 0, sizeof acc); /* * Process the additional authenticated data, ciphertext, and * footer in due order. */ br_enc64le(foot, (uint64_t)aad_len); br_enc64le(foot + 8, (uint64_t)len); _src_symcipher_poly1305_ctmul32_cpoly1305_inner(acc, r, aad, aad_len); _src_symcipher_poly1305_ctmul32_cpoly1305_inner(acc, r, data, len); _src_symcipher_poly1305_ctmul32_cpoly1305_inner(acc, r, foot, sizeof foot); /* * Finalise modular reduction. This is done with carry propagation * and applying the '2^130 = -5 mod p' rule. Note that the output * of poly1035_inner() is already mostly reduced, since only * acc[1] may be (very slightly) above 2^13. A single loop back * to acc[1] will be enough to make the value fit in 130 bits. */ cc = 0; for (i = 1; i < 10; i ++) { z = acc[i] + cc; acc[i] = z & 0x1FFF; cc = z >> 13; } z = acc[0] + cc + (cc << 2); acc[0] = z & 0x1FFF; acc[1] += z >> 13; /* * We may still have a value in the 2^130-5..2^130-1 range, in * which case we must reduce it again. The code below selects, * in constant-time, between 'acc' and 'acc-p', */ ctl = GT(acc[0], 0x1FFA); for (i = 1; i < 10; i ++) { ctl &= EQ(acc[i], 0x1FFF); } acc[0] = MUX(ctl, acc[0] - 0x1FFB, acc[0]); for (i = 1; i < 10; i ++) { acc[i] &= ~(-ctl); } /* * Convert back the accumulator to 32-bit words, and add the * 's' value (second half of pkey[]). That addition is done * modulo 2^128. */ z = acc[0] + (acc[1] << 13) + br_dec16le(pkey + 16); br_enc16le((unsigned char *)tag, z & 0xFFFF); z = (z >> 16) + (acc[2] << 10) + br_dec16le(pkey + 18); br_enc16le((unsigned char *)tag + 2, z & 0xFFFF); z = (z >> 16) + (acc[3] << 7) + br_dec16le(pkey + 20); br_enc16le((unsigned char *)tag + 4, z & 0xFFFF); z = (z >> 16) + (acc[4] << 4) + br_dec16le(pkey + 22); br_enc16le((unsigned char *)tag + 6, z & 0xFFFF); z = (z >> 16) + (acc[5] << 1) + (acc[6] << 14) + br_dec16le(pkey + 24); br_enc16le((unsigned char *)tag + 8, z & 0xFFFF); z = (z >> 16) + (acc[7] << 11) + br_dec16le(pkey + 26); br_enc16le((unsigned char *)tag + 10, z & 0xFFFF); z = (z >> 16) + (acc[8] << 8) + br_dec16le(pkey + 28); br_enc16le((unsigned char *)tag + 12, z & 0xFFFF); z = (z >> 16) + (acc[9] << 5) + br_dec16le(pkey + 30); br_enc16le((unsigned char *)tag + 14, z & 0xFFFF); /* * If decrypting, then ChaCha20 runs _after_ Poly1305. */ if (!encrypt) { ichacha(key, iv, 1, data, len); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if BR_INT128 || BR_UMUL128 #if BR_INT128 #define MUL128(hi, lo, x, y) do { \ unsigned __int128 mul128tmp; \ mul128tmp = (unsigned __int128)(x) * (unsigned __int128)(y); \ (hi) = (uint64_t)(mul128tmp >> 64); \ (lo) = (uint64_t)mul128tmp; \ } while (0) #elif BR_UMUL128 #include #define MUL128(hi, lo, x, y) do { \ (lo) = _umul128((x), (y), &(hi)); \ } while (0) #endif #define MASK42 ((uint64_t)0x000003FFFFFFFFFF) #define MASK44 ((uint64_t)0x00000FFFFFFFFFFF) /* * The "accumulator" word is nominally a 130-bit value. We split it into * words of 44 bits, each held in a 64-bit variable. * * If the current accumulator is a = a0 + a1*W + a2*W^2 (where W = 2^44) * and r = r0 + r1*W + r2*W^2, then: * * a*r = (a0*r0) * + (a0*r1 + a1*r0) * W * + (a0*r2 + a1*r1 + a2*r0) * W^2 * + (a1*r2 + a2*r1) * W^3 * + (a2*r2) * W^4 * * We want to reduce that value modulo p = 2^130-5, so W^3 = 20 mod p, * and W^4 = 20*W mod p. Thus, if we define u1 = 20*r1 and u2 = 20*r2, * then the equations above become: * * b0 = a0*r0 + a1*u2 + a2*u1 * b1 = a0*r1 + a1*r0 + a2*u2 * b2 = a0*r2 + a1*r1 + a2*r0 * * In order to make u1 fit in 44 bits, we can change these equations * into: * * b0 = a0*r0 + a1*u2 + a2*t1 * b1 = a0*r1 + a1*r0 + a2*t2 * b2 = a0*r2 + a1*r1 + a2*r0 * * Where t1 is u1 truncated to 44 bits, and t2 is u2 added to the extra * bits of u1. Note that since r is clamped down to a 124-bit value, the * values u2 and t2 fit on 44 bits too. * * The bx values are larger than 44 bits, so we may split them into a * lower half (cx, 44 bits) and an upper half (dx). The new values for * the accumulator are then: * * e0 = c0 + 20*d2 * e1 = c1 + d0 * e2 = c2 + d1 * * The equations allow for some room, i.e. the ax values may be larger * than 44 bits. Similarly, the ex values will usually be larger than * the ax. Thus, some sort of carry propagation must be done regularly, * though not necessarily at each iteration. In particular, we do not * need to compute the additions (for the bx values) over 128-bit * quantities; we can stick to 64-bit computations. * * * Since the 128-bit result of a 64x64 multiplication is actually * represented over two 64-bit registers, it is cheaper to arrange for * any split that happens between the "high" and "low" halves to be on * that 64-bit boundary. This is done by left shifting the rx, ux and tx * by 20 bits (since they all fit on 44 bits each, this shift is * always possible). */ static void _src_symcipher_poly1305_ctmulq_cpoly1305_inner_big(uint64_t *acc, uint64_t *r, const void *data, size_t len) { #define MX(hi, lo, m0, m1, m2) do { \ uint64_t mxhi, mxlo; \ MUL128(mxhi, mxlo, a0, m0); \ (hi) = mxhi; \ (lo) = mxlo >> 20; \ MUL128(mxhi, mxlo, a1, m1); \ (hi) += mxhi; \ (lo) += mxlo >> 20; \ MUL128(mxhi, mxlo, a2, m2); \ (hi) += mxhi; \ (lo) += mxlo >> 20; \ } while (0) const unsigned char *buf; uint64_t a0, a1, a2; uint64_t r0, r1, r2, t1, t2, u2; r0 = r[0]; r1 = r[1]; r2 = r[2]; t1 = r[3]; t2 = r[4]; u2 = r[5]; a0 = acc[0]; a1 = acc[1]; a2 = acc[2]; buf = (unsigned char*)data; while (len > 0) { uint64_t v0, v1, v2; uint64_t c0, c1, c2, d0, d1, d2; v0 = br_dec64le(buf + 0); v1 = br_dec64le(buf + 8); v2 = v1 >> 24; v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; v0 &= MASK44; a0 += v0; a1 += v1; a2 += v2 + ((uint64_t)1 << 40); MX(d0, c0, r0, u2, t1); MX(d1, c1, r1, r0, t2); MX(d2, c2, r2, r1, r0); a0 = c0 + 20 * d2; a1 = c1 + d0; a2 = c2 + d1; v0 = br_dec64le(buf + 16); v1 = br_dec64le(buf + 24); v2 = v1 >> 24; v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; v0 &= MASK44; a0 += v0; a1 += v1; a2 += v2 + ((uint64_t)1 << 40); MX(d0, c0, r0, u2, t1); MX(d1, c1, r1, r0, t2); MX(d2, c2, r2, r1, r0); a0 = c0 + 20 * d2; a1 = c1 + d0; a2 = c2 + d1; v0 = br_dec64le(buf + 32); v1 = br_dec64le(buf + 40); v2 = v1 >> 24; v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; v0 &= MASK44; a0 += v0; a1 += v1; a2 += v2 + ((uint64_t)1 << 40); MX(d0, c0, r0, u2, t1); MX(d1, c1, r1, r0, t2); MX(d2, c2, r2, r1, r0); a0 = c0 + 20 * d2; a1 = c1 + d0; a2 = c2 + d1; v0 = br_dec64le(buf + 48); v1 = br_dec64le(buf + 56); v2 = v1 >> 24; v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; v0 &= MASK44; a0 += v0; a1 += v1; a2 += v2 + ((uint64_t)1 << 40); MX(d0, c0, r0, u2, t1); MX(d1, c1, r1, r0, t2); MX(d2, c2, r2, r1, r0); a0 = c0 + 20 * d2; a1 = c1 + d0; a2 = c2 + d1; a1 += a0 >> 44; a0 &= MASK44; a2 += a1 >> 44; a1 &= MASK44; a0 += 20 * (a2 >> 44); a2 &= MASK44; buf += 64; len -= 64; } acc[0] = a0; acc[1] = a1; acc[2] = a2; #undef MX } static void _src_symcipher_poly1305_ctmulq_cpoly1305_inner_small(uint64_t *acc, uint64_t *r, const void *data, size_t len) { const unsigned char *buf; uint64_t a0, a1, a2; uint64_t r0, r1, r2, t1, t2, u2; r0 = r[0]; r1 = r[1]; r2 = r[2]; t1 = r[3]; t2 = r[4]; u2 = r[5]; a0 = acc[0]; a1 = acc[1]; a2 = acc[2]; buf = (unsigned char*)data; while (len > 0) { uint64_t v0, v1, v2; uint64_t c0, c1, c2, d0, d1, d2; unsigned char tmp[16]; if (len < 16) { memcpy(tmp, buf, len); memset(tmp + len, 0, (sizeof tmp) - len); buf = tmp; len = 16; } v0 = br_dec64le(buf + 0); v1 = br_dec64le(buf + 8); v2 = v1 >> 24; v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; v0 &= MASK44; a0 += v0; a1 += v1; a2 += v2 + ((uint64_t)1 << 40); #define MX(hi, lo, m0, m1, m2) do { \ uint64_t mxhi, mxlo; \ MUL128(mxhi, mxlo, a0, m0); \ (hi) = mxhi; \ (lo) = mxlo >> 20; \ MUL128(mxhi, mxlo, a1, m1); \ (hi) += mxhi; \ (lo) += mxlo >> 20; \ MUL128(mxhi, mxlo, a2, m2); \ (hi) += mxhi; \ (lo) += mxlo >> 20; \ } while (0) MX(d0, c0, r0, u2, t1); MX(d1, c1, r1, r0, t2); MX(d2, c2, r2, r1, r0); #undef MX a0 = c0 + 20 * d2; a1 = c1 + d0; a2 = c2 + d1; a1 += a0 >> 44; a0 &= MASK44; a2 += a1 >> 44; a1 &= MASK44; a0 += 20 * (a2 >> 44); a2 &= MASK44; buf += 16; len -= 16; } acc[0] = a0; acc[1] = a1; acc[2] = a2; } static inline void _src_symcipher_poly1305_ctmulq_cpoly1305_inner(uint64_t *acc, uint64_t *r, const void *data, size_t len) { if (len >= 64) { size_t len2; len2 = len & ~(size_t)63; _src_symcipher_poly1305_ctmulq_cpoly1305_inner_big(acc, r, data, len2); data = (const unsigned char *)data + len2; len -= len2; } if (len > 0) { _src_symcipher_poly1305_ctmulq_cpoly1305_inner_small(acc, r, data, len); } } /* see bearssl_block.h */ void br_poly1305_ctmulq_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt) { unsigned char pkey[32], foot[16]; uint64_t r[6], acc[3], r0, r1; uint32_t v0, v1, v2, v3, v4; uint64_t w0, w1, w2, w3; uint32_t ctl; /* * Compute the MAC key. The 'r' value is the first 16 bytes of * pkey[]. */ memset(pkey, 0, sizeof pkey); ichacha(key, iv, 0, pkey, sizeof pkey); /* * If encrypting, ChaCha20 must run first, followed by Poly1305. * When decrypting, the operations are reversed. */ if (encrypt) { ichacha(key, iv, 1, data, len); } /* * Run Poly1305. We must process the AAD, then ciphertext, then * the footer (with the lengths). Note that the AAD and ciphertext * are meant to be padded with zeros up to the next multiple of 16, * and the length of the footer is 16 bytes as well. */ /* * Apply the "clamping" on r. */ pkey[ 3] &= 0x0F; pkey[ 4] &= 0xFC; pkey[ 7] &= 0x0F; pkey[ 8] &= 0xFC; pkey[11] &= 0x0F; pkey[12] &= 0xFC; pkey[15] &= 0x0F; /* * Decode the 'r' value into 44-bit words, left-shifted by 20 bits. * Also compute the u1 and u2 values. */ r0 = br_dec64le(pkey + 0); r1 = br_dec64le(pkey + 8); r[0] = r0 << 20; r[1] = ((r0 >> 24) | (r1 << 40)) & ~(uint64_t)0xFFFFF; r[2] = (r1 >> 4) & ~(uint64_t)0xFFFFF; r1 = 20 * (r[1] >> 20); r[3] = r1 << 20; r[5] = 20 * r[2]; r[4] = (r[5] + (r1 >> 24)) & ~(uint64_t)0xFFFFF; /* * Accumulator is 0. */ acc[0] = 0; acc[1] = 0; acc[2] = 0; /* * Process the additional authenticated data, ciphertext, and * footer in due order. */ br_enc64le(foot, (uint64_t)aad_len); br_enc64le(foot + 8, (uint64_t)len); _src_symcipher_poly1305_ctmulq_cpoly1305_inner(acc, r, aad, aad_len); _src_symcipher_poly1305_ctmulq_cpoly1305_inner(acc, r, data, len); _src_symcipher_poly1305_ctmulq_cpoly1305_inner_small(acc, r, foot, sizeof foot); /* * Finalise modular reduction. At that point, the value consists * in three 44-bit values (the lowest one might be slightly above * 2^44). Two loops shall be sufficient. */ acc[1] += (acc[0] >> 44); acc[0] &= MASK44; acc[2] += (acc[1] >> 44); acc[1] &= MASK44; acc[0] += 5 * (acc[2] >> 42); acc[2] &= MASK42; acc[1] += (acc[0] >> 44); acc[0] &= MASK44; acc[2] += (acc[1] >> 44); acc[1] &= MASK44; acc[0] += 5 * (acc[2] >> 42); acc[2] &= MASK42; /* * The value may still fall in the 2^130-5..2^130-1 range, in * which case we must reduce it again. The code below selects, * in constant-time, between 'acc' and 'acc-p'. We encode the * value over four 32-bit integers to finish the operation. */ v0 = (uint32_t)acc[0]; v1 = (uint32_t)(acc[0] >> 32) | ((uint32_t)acc[1] << 12); v2 = (uint32_t)(acc[1] >> 20) | ((uint32_t)acc[2] << 24); v3 = (uint32_t)(acc[2] >> 8); v4 = (uint32_t)(acc[2] >> 40); ctl = GT(v0, 0xFFFFFFFA); ctl &= EQ(v1, 0xFFFFFFFF); ctl &= EQ(v2, 0xFFFFFFFF); ctl &= EQ(v3, 0xFFFFFFFF); ctl &= EQ(v4, 0x00000003); v0 = MUX(ctl, v0 + 5, v0); v1 = MUX(ctl, 0, v1); v2 = MUX(ctl, 0, v2); v3 = MUX(ctl, 0, v3); /* * Add the "s" value. This is done modulo 2^128. Don't forget * carry propagation... */ w0 = (uint64_t)v0 + (uint64_t)br_dec32le(pkey + 16); w1 = (uint64_t)v1 + (uint64_t)br_dec32le(pkey + 20) + (w0 >> 32); w2 = (uint64_t)v2 + (uint64_t)br_dec32le(pkey + 24) + (w1 >> 32); w3 = (uint64_t)v3 + (uint64_t)br_dec32le(pkey + 28) + (w2 >> 32); v0 = (uint32_t)w0; v1 = (uint32_t)w1; v2 = (uint32_t)w2; v3 = (uint32_t)w3; /* * Encode the tag. */ br_enc32le((unsigned char *)tag + 0, v0); br_enc32le((unsigned char *)tag + 4, v1); br_enc32le((unsigned char *)tag + 8, v2); br_enc32le((unsigned char *)tag + 12, v3); /* * If decrypting, then ChaCha20 runs _after_ Poly1305. */ if (!encrypt) { ichacha(key, iv, 1, data, len); } } /* see bearssl_block.h */ br_poly1305_run br_poly1305_ctmulq_get(void) { return &br_poly1305_ctmulq_run; } #else /* see bearssl_block.h */ br_poly1305_run br_poly1305_ctmulq_get(void) { return 0; } #endif //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2017 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * This is a "reference" implementation of Poly1305 that uses the * generic "i15" code for big integers. It is slow, but it handles all * big-integer operations with generic code, thereby avoiding most * tricky situations with carry propagation and modular reduction. */ /* * Modulus: 2^130-5. */ static const uint16_t P1305[] = { 0x008A, 0x7FFB, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x03FF }; /* * -p mod 2^15. */ #define _src_symcipher_poly1305_i15_cP0I 0x4CCD /* * R^2 mod p, for conversion to Montgomery representation (R = 2^135, * since we use 9 words of 15 bits each, and 15*9 = 135). */ static const uint16_t R2[] = { 0x008A, 0x6400, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; /* * Perform the inner processing of blocks for Poly1305. The "r" array * is in Montgomery representation, while the "a" array is not. */ static void _src_symcipher_poly1305_i15_cpoly1305_inner(uint16_t *a, const uint16_t *r, const void *data, size_t len) { const unsigned char *buf; buf = (unsigned char*)data; while (len > 0) { unsigned char tmp[16], rev[16]; uint16_t b[10]; uint32_t ctl; int i; /* * If there is a partial block, right-pad it with zeros. */ if (len < 16) { memset(tmp, 0, sizeof tmp); memcpy(tmp, buf, len); buf = tmp; len = 16; } /* * Decode next block and apply the "high bit". Since * decoding is little-endian, we must byte-swap the buffer. */ for (i = 0; i < 16; i ++) { rev[i] = buf[15 - i]; } br_i15_decode_mod(b, rev, sizeof rev, P1305); b[9] |= 0x0100; /* * Add the accumulator to the decoded block (modular * addition). */ ctl = br_i15_add(b, a, 1); ctl |= NOT(br_i15_sub(b, P1305, 0)); br_i15_sub(b, P1305, ctl); /* * Multiply by r, result is the new accumulator value. */ br_i15_montymul(a, b, r, P1305, _src_symcipher_poly1305_i15_cP0I); buf += 16; len -= 16; } } /* * Byteswap a 16-byte value. */ static void _src_symcipher_poly1305_i15_cbyteswap16(unsigned char *buf) { int i; for (i = 0; i < 8; i ++) { unsigned x; x = buf[i]; buf[i] = buf[15 - i]; buf[15 - i] = x; } } /* see bearssl_block.h */ void br_poly1305_i15_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt) { unsigned char pkey[32], foot[16]; uint16_t t[10], r[10], acc[10]; /* * Compute the MAC key. The 'r' value is the first 16 bytes of * pkey[]. */ memset(pkey, 0, sizeof pkey); ichacha(key, iv, 0, pkey, sizeof pkey); /* * If encrypting, ChaCha20 must run first, followed by Poly1305. * When decrypting, the operations are reversed. */ if (encrypt) { ichacha(key, iv, 1, data, len); } /* * Run Poly1305. We must process the AAD, then ciphertext, then * the footer (with the lengths). Note that the AAD and ciphertext * are meant to be padded with zeros up to the next multiple of 16, * and the length of the footer is 16 bytes as well. */ /* * Apply the "clamping" operation on the encoded 'r' value. */ pkey[ 3] &= 0x0F; pkey[ 7] &= 0x0F; pkey[11] &= 0x0F; pkey[15] &= 0x0F; pkey[ 4] &= 0xFC; pkey[ 8] &= 0xFC; pkey[12] &= 0xFC; /* * Decode the clamped 'r' value. Decoding should use little-endian * so we must _src_symcipher_poly1305_i15_cbyteswap the value first. */ _src_symcipher_poly1305_i15_cbyteswap16((unsigned char *)pkey); br_i15_decode_mod(t, pkey, 16, P1305); /* * Convert 'r' to Montgomery representation. */ br_i15_montymul(r, t, R2, P1305, _src_symcipher_poly1305_i15_cP0I); /* * Accumulator is 0. */ br_i15_zero(acc, 0x8A); /* * Process the additional authenticated data, ciphertext, and * footer in due order. */ br_enc64le(foot, (uint64_t)aad_len); br_enc64le(foot + 8, (uint64_t)len); _src_symcipher_poly1305_i15_cpoly1305_inner(acc, r, aad, aad_len); _src_symcipher_poly1305_i15_cpoly1305_inner(acc, r, data, len); _src_symcipher_poly1305_i15_cpoly1305_inner(acc, r, foot, sizeof foot); /* * Decode the value 's'. Again, a _src_symcipher_poly1305_i15_cbyteswap is needed. */ _src_symcipher_poly1305_i15_cbyteswap16((unsigned char*)pkey + 16); br_i15_decode_mod(t, pkey + 16, 16, P1305); /* * Add the value 's' to the accumulator. That addition is done * modulo 2^128, so we just ignore the carry. */ br_i15_add(acc, t, 1); /* * Encode the result (128 low bits) to the tag. Encoding should * be little-endian. */ br_i15_encode(tag, 16, acc); _src_symcipher_poly1305_i15_cbyteswap16((unsigned char*)tag); /* * If decrypting, then ChaCha20 runs _after_ Poly1305. */ if (!encrypt) { ichacha(key, iv, 1, data, len); } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ br_asn1_uint br_asn1_uint_prepare(const void *xdata, size_t xlen) { const unsigned char *x; br_asn1_uint t; x = (const unsigned char *)xdata; while (xlen > 0 && *x == 0) { x ++; xlen --; } t.data = x; t.len = xlen; t.asn1len = xlen; if (xlen == 0 || x[0] >= 0x80) { t.asn1len ++; } return t; } /* see inner.h */ size_t br_asn1_encode_length(void *dest, size_t len) { unsigned char *buf; size_t z; int i, j; buf = (unsigned char *)dest; if (len < 0x80) { if (buf != NULL) { *buf = len; } return 1; } i = 0; for (z = len; z != 0; z >>= 8) { i ++; } if (buf != NULL) { *buf ++ = 0x80 + i; for (j = i - 1; j >= 0; j --) { *buf ++ = len >> (j << 3); } } return i + 1; } /* see inner.h */ size_t br_asn1_encode_uint(void *dest, br_asn1_uint pp) { unsigned char *buf; size_t lenlen; if (dest == NULL) { return 1 + br_asn1_encode_length(NULL, pp.asn1len) + pp.asn1len; } buf = (unsigned char *)dest; *buf ++ = 0x02; lenlen = br_asn1_encode_length(buf, pp.asn1len); buf += lenlen; *buf = 0x00; memcpy(buf + pp.asn1len - pp.len, pp.data, pp.len); return 1 + lenlen + pp.asn1len; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_x509.h */ size_t br_encode_ec_pkcs8_der(void *dest, const br_ec_private_key *sk, const br_ec_public_key *pk) { /* * ASN.1 format: * * OneAsymmetricKey ::= SEQUENCE { * version Version, * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier, * privateKey PrivateKey, * attributes [0] Attributes OPTIONAL, * ..., * [[2: publicKey [1] PublicKey OPTIONAL ]], * ... * } * * We don't include attributes or public key (the public key * is included in the private key value instead). The * 'version' field is an INTEGER that we will set to 0 * (meaning 'v1', compatible with previous versions of PKCS#8). * The 'privateKeyAlgorithm' structure is an AlgorithmIdentifier * whose OID should be id-ecPublicKey, with, as parameters, the * curve OID. The 'privateKey' is an OCTET STRING, whose value * is the "raw DER" encoding of the key pair. */ /* * OID id-ecPublicKey (1.2.840.10045.2.1), DER-encoded (with * the tag). */ static const unsigned char OID_ECPUBKEY[] = { 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01 }; size_t len_version, len_privateKeyAlgorithm, len_privateKeyValue; size_t len_privateKey, len_seq; const unsigned char *oid; oid = br_get_curve_OID(sk->curve); if (oid == NULL) { return 0; } len_version = 3; len_privateKeyAlgorithm = 2 + sizeof OID_ECPUBKEY + 2 + oid[0]; len_privateKeyValue = br_encode_ec_raw_der_inner(NULL, sk, pk, 0); len_privateKey = 1 + len_of_len(len_privateKeyValue) + len_privateKeyValue; len_seq = len_version + len_privateKeyAlgorithm + len_privateKey; if (dest == NULL) { return 1 + len_of_len(len_seq) + len_seq; } else { unsigned char *buf; size_t lenlen; buf = (unsigned char *)dest; *buf ++ = 0x30; /* SEQUENCE tag */ lenlen = br_asn1_encode_length(buf, len_seq); buf += lenlen; /* version */ *buf ++ = 0x02; *buf ++ = 0x01; *buf ++ = 0x00; /* privateKeyAlgorithm */ *buf ++ = 0x30; *buf ++ = (sizeof OID_ECPUBKEY) + 2 + oid[0]; memcpy(buf, OID_ECPUBKEY, sizeof OID_ECPUBKEY); buf += sizeof OID_ECPUBKEY; *buf ++ = 0x06; memcpy(buf, oid, 1 + oid[0]); buf += 1 + oid[0]; /* privateKey */ *buf ++ = 0x04; buf += br_asn1_encode_length(buf, len_privateKeyValue); br_encode_ec_raw_der_inner(buf, sk, pk, 0); return 1 + lenlen + len_seq; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see inner.h */ const unsigned char * br_get_curve_OID(int curve) { static const unsigned char OID_secp256r1[] = { 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07 }; static const unsigned char OID_secp384r1[] = { 0x05, 0x2b, 0x81, 0x04, 0x00, 0x22 }; static const unsigned char OID_secp521r1[] = { 0x05, 0x2b, 0x81, 0x04, 0x00, 0x23 }; switch (curve) { case BR_EC_secp256r1: return OID_secp256r1; case BR_EC_secp384r1: return OID_secp384r1; case BR_EC_secp521r1: return OID_secp521r1; default: return NULL; } } /* see inner.h */ size_t br_encode_ec_raw_der_inner(void *dest, const br_ec_private_key *sk, const br_ec_public_key *pk, int include_curve_oid) { /* * ASN.1 format: * * ECPrivateKey ::= SEQUENCE { * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1), * privateKey OCTET STRING, * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL, * publicKey [1] BIT STRING OPTIONAL * } * * The tages '[0]' and '[1]' are explicit. The 'ECParameters' * is a CHOICE; in our case, it will always be an OBJECT IDENTIFIER * that identifies the curve. * * The value of the 'privateKey' field is the raw unsigned big-endian * encoding of the private key (integer modulo the curve subgroup * order); there is no INTEGER tag, and the leading bit may be 1. * Also, leading bytes of value 0x00 are _not_ removed. * * The 'publicKey' contents are the raw encoded public key point, * normally uncompressed (leading byte of value 0x04, followed * by the unsigned big-endian encodings of the X and Y coordinates, * padded to the full field length if necessary). */ size_t len_version, len_privateKey, len_parameters, len_publicKey; size_t len_publicKey_bits, len_seq; const unsigned char *oid; if (include_curve_oid) { oid = br_get_curve_OID(sk->curve); if (oid == NULL) { return 0; } } else { oid = NULL; } len_version = 3; len_privateKey = 1 + len_of_len(sk->xlen) + sk->xlen; if (include_curve_oid) { len_parameters = 4 + oid[0]; } else { len_parameters = 0; } if (pk == NULL) { len_publicKey = 0; len_publicKey_bits = 0; } else { len_publicKey_bits = 2 + len_of_len(pk->qlen) + pk->qlen; len_publicKey = 1 + len_of_len(len_publicKey_bits) + len_publicKey_bits; } len_seq = len_version + len_privateKey + len_parameters + len_publicKey; if (dest == NULL) { return 1 + len_of_len(len_seq) + len_seq; } else { unsigned char *buf; size_t lenlen; buf = (unsigned char *)dest; *buf ++ = 0x30; /* SEQUENCE tag */ lenlen = br_asn1_encode_length(buf, len_seq); buf += lenlen; /* version */ *buf ++ = 0x02; *buf ++ = 0x01; *buf ++ = 0x01; /* privateKey */ *buf ++ = 0x04; buf += br_asn1_encode_length(buf, sk->xlen); memcpy(buf, sk->x, sk->xlen); buf += sk->xlen; /* parameters */ if (include_curve_oid) { *buf ++ = 0xA0; *buf ++ = oid[0] + 2; *buf ++ = 0x06; memcpy(buf, oid, oid[0] + 1); buf += oid[0] + 1; } /* publicKey */ if (pk != NULL) { *buf ++ = 0xA1; buf += br_asn1_encode_length(buf, len_publicKey_bits); *buf ++ = 0x03; buf += br_asn1_encode_length(buf, pk->qlen + 1); *buf ++ = 0x00; memcpy(buf, pk->q, pk->qlen); /* buf += pk->qlen; */ } return 1 + lenlen + len_seq; } } /* see bearssl_x509.h */ size_t br_encode_ec_raw_der(void *dest, const br_ec_private_key *sk, const br_ec_public_key *pk) { return br_encode_ec_raw_der_inner(dest, sk, pk, 1); } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_x509.h */ size_t br_encode_rsa_pkcs8_der(void *dest, const br_rsa_private_key *sk, const br_rsa_public_key *pk, const void *d, size_t dlen) { /* * ASN.1 format: * * OneAsymmetricKey ::= SEQUENCE { * version Version, * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier, * privateKey PrivateKey, * attributes [0] Attributes OPTIONAL, * ..., * [[2: publicKey [1] PublicKey OPTIONAL ]], * ... * } * * We don't include attributes or public key. The 'version' field * is an INTEGER that we will set to 0 (meaning 'v1', compatible * with previous versions of PKCS#8). The 'privateKeyAlgorithm' * structure is an AlgorithmIdentifier whose OID should be * rsaEncryption, with NULL parameters. The 'privateKey' is an * OCTET STRING, whose value is the "raw DER" encoding of the * key pair. * * Since the private key value comes last, this function really * adds a header, which is mostly fixed (only some lengths have * to be modified. */ /* * Concatenation of: * - DER encoding of an INTEGER of value 0 (the 'version' field) * - DER encoding of a PrivateKeyAlgorithmIdentifier that uses * the rsaEncryption OID, and NULL parameters * - An OCTET STRING tag */ static const unsigned char PK8_HEAD[] = { 0x02, 0x01, 0x00, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x04 }; size_t len_raw, len_seq; len_raw = br_encode_rsa_raw_der(NULL, sk, pk, d, dlen); len_seq = (sizeof PK8_HEAD) + len_of_len(len_raw) + len_raw; if (dest == NULL) { return 1 + len_of_len(len_seq) + len_seq; } else { unsigned char *buf; size_t lenlen; buf = (unsigned char *)dest; *buf ++ = 0x30; /* SEQUENCE tag */ lenlen = br_asn1_encode_length(buf, len_seq); buf += lenlen; /* version, privateKeyAlgorithm, privateKey tag */ memcpy(buf, PK8_HEAD, sizeof PK8_HEAD); buf += sizeof PK8_HEAD; /* privateKey */ buf += br_asn1_encode_length(buf, len_raw); br_encode_rsa_raw_der(buf, sk, pk, d, dlen); return 1 + lenlen + len_seq; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2018 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_x509.h */ size_t br_encode_rsa_raw_der(void *dest, const br_rsa_private_key *sk, const br_rsa_public_key *pk, const void *d, size_t dlen) { /* * ASN.1 format: * * RSAPrivateKey ::= SEQUENCE { * version Version, * modulus INTEGER, -- n * publicExponent INTEGER, -- e * privateExponent INTEGER, -- d * prime1 INTEGER, -- p * prime2 INTEGER, -- q * exponent1 INTEGER, -- d mod (p-1) * exponent2 INTEGER, -- d mod (q-1) * coefficient INTEGER, -- (inverse of q) mod p * otherPrimeInfos OtherPrimeInfos OPTIONAL * } * * The 'version' field is an INTEGER of value 0 (meaning: there * are exactly two prime factors), and 'otherPrimeInfos' will * be absent (because there are exactly two prime factors). */ br_asn1_uint num[9]; size_t u, slen; /* * For all INTEGER values, get the pointer and length for the * data bytes. */ num[0] = br_asn1_uint_prepare(NULL, 0); num[1] = br_asn1_uint_prepare(pk->n, pk->nlen); num[2] = br_asn1_uint_prepare(pk->e, pk->elen); num[3] = br_asn1_uint_prepare(d, dlen); num[4] = br_asn1_uint_prepare(sk->p, sk->plen); num[5] = br_asn1_uint_prepare(sk->q, sk->qlen); num[6] = br_asn1_uint_prepare(sk->dp, sk->dplen); num[7] = br_asn1_uint_prepare(sk->dq, sk->dqlen); num[8] = br_asn1_uint_prepare(sk->iq, sk->iqlen); /* * Get the length of the SEQUENCE contents. */ slen = 0; for (u = 0; u < 9; u ++) { uint32_t ilen; ilen = num[u].asn1len; slen += 1 + len_of_len(ilen) + ilen; } if (dest == NULL) { return 1 + len_of_len(slen) + slen; } else { unsigned char *buf; size_t lenlen; buf = (unsigned char *)dest; *buf ++ = 0x30; /* SEQUENCE tag */ lenlen = br_asn1_encode_length(buf, slen); buf += lenlen; for (u = 0; u < 9; u ++) { buf += br_asn1_encode_uint(buf, num[u]); } return 1 + lenlen + slen; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_x509_skey_decoder_ct0_context; static uint32_t _src_x509_skey_decoder_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_x509_skey_decoder_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char _src_x509_skey_decoder_ct0_datablock[]; */ void br_skey_decoder_init_main(void *t0ctx); void br_skey_decoder_run(void *t0ctx); #define _src_x509_skey_decoder_cCTX ((br_skey_decoder_context *)(void *)((unsigned char *)t0ctx - offsetof(br_skey_decoder_context, cpu))) #define _src_x509_skey_decoder_cCONTEXT_NAME br_skey_decoder_context /* see bearssl_x509.h */ void br_skey_decoder_init(br_skey_decoder_context *ctx) { memset(ctx, 0, sizeof *ctx); ctx->cpu.dp = &ctx->dp_stack[0]; ctx->cpu.rp = &ctx->rp_stack[0]; br_skey_decoder_init_main(&ctx->cpu); br_skey_decoder_run(&ctx->cpu); } /* see bearssl_x509.h */ void br_skey_decoder_push(br_skey_decoder_context *ctx, const void *data, size_t len) { ctx->hbuf = (const unsigned char*)data; ctx->hlen = len; br_skey_decoder_run(&ctx->cpu); } static const unsigned char _src_x509_skey_decoder_ct0_datablock[] = { 0x00, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x02, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x22, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x23 }; static const unsigned char _src_x509_skey_decoder_ct0_codeblock[] = { 0x00, 0x01, 0x01, 0x07, 0x00, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x13, 0x13, 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_CLASS), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_VALUE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_EXTRA_ELEMENT), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INDEFINITE_LENGTH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INNER_TRUNC), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INVALID_VALUE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_LIMIT_EXCEEDED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_CONSTRUCTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_PRIMITIVE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_OVERFLOW), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNEXPECTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNSUPPORTED), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_EC), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_RSA), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_skey_decoder_cCONTEXT_NAME, key_data)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_skey_decoder_cCONTEXT_NAME, key_type)), 0x00, 0x00, 0x33, 0x48, 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_skey_decoder_cCONTEXT_NAME, pad)), 0x00, 0x00, 0x01, 0x13, 0x00, 0x00, 0x01, 0x1C, 0x00, 0x00, 0x01, 0x22, 0x00, 0x00, 0x05, 0x02, 0x2C, 0x16, 0x00, 0x00, 0x06, 0x02, 0x2D, 0x16, 0x00, 0x00, 0x01, 0x10, 0x3D, 0x00, 0x00, 0x0D, 0x05, 0x02, 0x2F, 0x16, 0x3A, 0x00, 0x00, 0x0D, 0x05, 0x02, 0x2F, 0x16, 0x3B, 0x00, 0x00, 0x06, 0x02, 0x27, 0x16, 0x00, 0x01, 0x03, 0x00, 0x54, 0x57, 0x01, 0x02, 0x3E, 0x55, 0x23, 0x06, 0x02, 0x30, 0x16, 0x57, 0x01, 0x04, 0x3E, 0x02, 0x00, 0x41, 0x3F, 0x00, 0x02, 0x03, 0x00, 0x53, 0x14, 0x14, 0x03, 0x01, 0x48, 0x0E, 0x06, 0x02, 0x30, 0x16, 0x33, 0x4C, 0x58, 0x01, 0x7F, 0x19, 0x0D, 0x06, 0x04, 0x13, 0x13, 0x04, 0x29, 0x01, 0x20, 0x19, 0x0D, 0x06, 0x16, 0x13, 0x3A, 0x53, 0x4D, 0x02, 0x00, 0x06, 0x09, 0x02, 0x00, 0x0C, 0x06, 0x02, 0x2A, 0x16, 0x04, 0x02, 0x03, 0x00, 0x3F, 0x04, 0x0D, 0x01, 0x21, 0x19, 0x0D, 0x06, 0x04, 0x13, 0x3A, 0x04, 0x03, 0x30, 0x16, 0x13, 0x5D, 0x02, 0x00, 0x05, 0x02, 0x30, 0x16, 0x02, 0x00, 0x02, 0x01, 0x1D, 0x00, 0x02, 0x53, 0x4B, 0x05, 0x02, 0x30, 0x16, 0x5B, 0x15, 0x06, 0x07, 0x5D, 0x01, 0x7F, 0x03, 0x01, 0x04, 0x16, 0x46, 0x15, 0x06, 0x10, 0x01, 0x00, 0x03, 0x01, 0x14, 0x06, 0x03, 0x4D, 0x04, 0x02, 0x01, 0x00, 0x03, 0x00, 0x04, 0x02, 0x30, 0x16, 0x3F, 0x57, 0x01, 0x04, 0x3E, 0x53, 0x02, 0x01, 0x06, 0x03, 0x43, 0x04, 0x03, 0x02, 0x00, 0x40, 0x3F, 0x5D, 0x02, 0x01, 0x06, 0x03, 0x32, 0x04, 0x01, 0x31, 0x00, 0x00, 0x54, 0x57, 0x01, 0x02, 0x3E, 0x55, 0x06, 0x02, 0x30, 0x16, 0x57, 0x01, 0x02, 0x3E, 0x44, 0x3F, 0x00, 0x07, 0x35, 0x50, 0x14, 0x05, 0x02, 0x2F, 0x16, 0x23, 0x01, 0x03, 0x0B, 0x33, 0x17, 0x47, 0x07, 0x03, 0x00, 0x4F, 0x4F, 0x35, 0x4E, 0x14, 0x14, 0x03, 0x01, 0x03, 0x02, 0x51, 0x14, 0x03, 0x03, 0x02, 0x02, 0x07, 0x14, 0x03, 0x02, 0x51, 0x14, 0x03, 0x04, 0x02, 0x02, 0x07, 0x14, 0x03, 0x02, 0x51, 0x14, 0x03, 0x05, 0x02, 0x02, 0x07, 0x14, 0x03, 0x02, 0x51, 0x03, 0x06, 0x02, 0x00, 0x02, 0x01, 0x02, 0x03, 0x02, 0x04, 0x02, 0x05, 0x02, 0x06, 0x1E, 0x00, 0x00, 0x19, 0x19, 0x00, 0x00, 0x01, 0x0B, 0x00, 0x00, 0x01, 0x00, 0x20, 0x14, 0x06, 0x08, 0x01, 0x01, 0x21, 0x20, 0x22, 0x20, 0x04, 0x75, 0x13, 0x00, 0x00, 0x01, T0_INT2(3 * BR_X509_BUFSIZE_SIG), 0x00, 0x01, 0x01, 0x87, 0xFF, 0xFF, 0x7F, 0x54, 0x57, 0x01, 0x02, 0x3E, 0x55, 0x01, 0x01, 0x0E, 0x06, 0x02, 0x30, 0x16, 0x57, 0x01, 0x02, 0x19, 0x0D, 0x06, 0x06, 0x13, 0x3B, 0x44, 0x32, 0x04, 0x1C, 0x01, 0x04, 0x19, 0x0D, 0x06, 0x08, 0x13, 0x3B, 0x01, 0x00, 0x41, 0x31, 0x04, 0x0E, 0x01, 0x10, 0x19, 0x0D, 0x06, 0x05, 0x13, 0x3A, 0x42, 0x04, 0x03, 0x30, 0x16, 0x13, 0x03, 0x00, 0x3F, 0x02, 0x00, 0x34, 0x1F, 0x5A, 0x27, 0x16, 0x00, 0x01, 0x45, 0x0A, 0x06, 0x02, 0x29, 0x16, 0x14, 0x03, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x57, 0x01, 0x06, 0x3E, 0x56, 0x00, 0x00, 0x20, 0x14, 0x06, 0x07, 0x1A, 0x14, 0x06, 0x01, 0x12, 0x04, 0x76, 0x24, 0x00, 0x00, 0x4B, 0x05, 0x02, 0x30, 0x16, 0x37, 0x15, 0x06, 0x04, 0x01, 0x17, 0x04, 0x12, 0x38, 0x15, 0x06, 0x04, 0x01, 0x18, 0x04, 0x0A, 0x39, 0x15, 0x06, 0x04, 0x01, 0x19, 0x04, 0x02, 0x30, 0x16, 0x00, 0x00, 0x1C, 0x57, 0x01, 0x02, 0x3E, 0x09, 0x50, 0x00, 0x00, 0x35, 0x4E, 0x13, 0x00, 0x03, 0x14, 0x03, 0x00, 0x03, 0x01, 0x03, 0x02, 0x53, 0x59, 0x14, 0x01, 0x81, 0x00, 0x0F, 0x06, 0x02, 0x2E, 0x16, 0x14, 0x01, 0x00, 0x0D, 0x06, 0x0B, 0x13, 0x14, 0x05, 0x04, 0x13, 0x01, 0x00, 0x00, 0x59, 0x04, 0x6F, 0x02, 0x01, 0x14, 0x05, 0x02, 0x2B, 0x16, 0x23, 0x03, 0x01, 0x02, 0x02, 0x1F, 0x02, 0x02, 0x22, 0x03, 0x02, 0x14, 0x06, 0x03, 0x59, 0x04, 0x68, 0x13, 0x02, 0x00, 0x02, 0x01, 0x08, 0x00, 0x00, 0x14, 0x35, 0x1C, 0x08, 0x20, 0x1C, 0x07, 0x20, 0x4E, 0x00, 0x01, 0x59, 0x14, 0x01, 0x81, 0x00, 0x0A, 0x06, 0x01, 0x00, 0x01, 0x81, 0x00, 0x08, 0x14, 0x05, 0x02, 0x28, 0x16, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x0E, 0x06, 0x19, 0x02, 0x00, 0x23, 0x03, 0x00, 0x14, 0x01, 0x83, 0xFF, 0xFF, 0x7F, 0x0E, 0x06, 0x02, 0x29, 0x16, 0x01, 0x08, 0x0B, 0x20, 0x59, 0x1C, 0x07, 0x04, 0x60, 0x00, 0x00, 0x52, 0x4A, 0x00, 0x00, 0x57, 0x3C, 0x53, 0x00, 0x01, 0x53, 0x14, 0x05, 0x02, 0x2E, 0x16, 0x59, 0x14, 0x01, 0x81, 0x00, 0x0F, 0x06, 0x02, 0x2E, 0x16, 0x03, 0x00, 0x14, 0x06, 0x16, 0x59, 0x02, 0x00, 0x14, 0x01, 0x87, 0xFF, 0xFF, 0x7F, 0x0F, 0x06, 0x02, 0x2E, 0x16, 0x01, 0x08, 0x0B, 0x07, 0x03, 0x00, 0x04, 0x67, 0x13, 0x02, 0x00, 0x00, 0x00, 0x53, 0x14, 0x01, 0x81, 0x7F, 0x0E, 0x06, 0x08, 0x5C, 0x01, 0x00, 0x36, 0x1F, 0x01, 0x00, 0x00, 0x14, 0x36, 0x1F, 0x36, 0x22, 0x4C, 0x01, 0x7F, 0x00, 0x01, 0x59, 0x03, 0x00, 0x02, 0x00, 0x01, 0x05, 0x10, 0x01, 0x01, 0x11, 0x18, 0x02, 0x00, 0x01, 0x06, 0x10, 0x14, 0x01, 0x01, 0x11, 0x06, 0x02, 0x25, 0x16, 0x01, 0x04, 0x0B, 0x02, 0x00, 0x01, 0x1F, 0x11, 0x14, 0x01, 0x1F, 0x0D, 0x06, 0x02, 0x26, 0x16, 0x07, 0x00, 0x00, 0x14, 0x05, 0x05, 0x01, 0x00, 0x01, 0x7F, 0x00, 0x57, 0x00, 0x00, 0x14, 0x05, 0x02, 0x29, 0x16, 0x23, 0x5A, 0x00, 0x00, 0x1B, 0x14, 0x01, 0x00, 0x0F, 0x06, 0x01, 0x00, 0x13, 0x12, 0x04, 0x74, 0x00, 0x01, 0x01, 0x00, 0x00, 0x5D, 0x13, 0x00, 0x00, 0x14, 0x06, 0x07, 0x5E, 0x14, 0x06, 0x01, 0x12, 0x04, 0x76, 0x00, 0x00, 0x01, 0x00, 0x19, 0x1A, 0x09, 0x24, 0x00 }; static const uint16_t _src_x509_skey_decoder_ct0_caddr[] = { 0, 5, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 70, 75, 80, 84, 89, 93, 97, 101, 107, 113, 118, 126, 134, 140, 163, 244, 311, 329, 404, 408, 412, 429, 434, 505, 519, 526, 540, 573, 582, 587, 654, 665, 721, 725, 730, 778, 804, 848, 859, 868, 881, 885, 889, 901 }; #define _src_x509_skey_decoder_cT0_INTERPRETED 34 #define _src_x509_skey_decoder_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &_src_x509_skey_decoder_ct0_codeblock[_src_x509_skey_decoder_ct0_caddr[(slot) - _src_x509_skey_decoder_cT0_INTERPRETED]]; \ t0_lnum = _src_x509_skey_decoder_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &_src_x509_skey_decoder_ct0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define _src_x509_skey_decoder_cT0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_x509_skey_decoder_ct0_context *t0ctx =(_src_x509_skey_decoder_ct0_context*)ctx; \ t0ctx->ip = &_src_x509_skey_decoder_ct0_codeblock[0]; \ _src_x509_skey_decoder_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } _src_x509_skey_decoder_cT0_DEFENTRY(br_skey_decoder_init_main, 73) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_skey_decoder_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_x509_skey_decoder_ct0_context *)t0ctx)->dp; rp = ((_src_x509_skey_decoder_ct0_context *)t0ctx)->rp; ip = ((_src_x509_skey_decoder_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_x509_skey_decoder_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &_src_x509_skey_decoder_ct0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_x509_skey_decoder_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_x509_skey_decoder_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_x509_skey_decoder_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_x509_skey_decoder_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_x509_skey_decoder_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_x509_skey_decoder_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 8: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 9: { /* -rot */ T0_NROT(); } break; case 10: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 11: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 12: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 13: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 14: { /* > */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a > b)); } break; case 15: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 16: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 17: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 18: { /* co */ T0_CO(); } break; case 19: { /* drop */ (void)T0_POP(); } break; case 20: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 21: { /* eqOID */ const unsigned char *a2 = &_src_x509_skey_decoder_ct0_datablock[T0_POP()]; const unsigned char *a1 = &_src_x509_skey_decoder_cCTX->pad[0]; size_t len = a1[0]; int x; if (len == a2[0]) { x = -(memcmp(a1 + 1, a2 + 1, len) == 0); } else { x = 0; } T0_PUSH((uint32_t)x); } break; case 22: { /* fail */ _src_x509_skey_decoder_cCTX->err = T0_POPi(); T0_CO(); } break; case 23: { /* get8 */ uint32_t addr = T0_POP(); T0_PUSH(*((unsigned char *)_src_x509_skey_decoder_cCTX + addr)); } break; case 24: { /* neg */ uint32_t a = T0_POP(); T0_PUSH(-a); } break; case 25: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 26: { /* read-blob-inner */ uint32_t len = T0_POP(); uint32_t addr = T0_POP(); size_t clen = _src_x509_skey_decoder_cCTX->hlen; if (clen > len) { clen = (size_t)len; } if (addr != 0) { memcpy((unsigned char *)_src_x509_skey_decoder_cCTX + addr, _src_x509_skey_decoder_cCTX->hbuf, clen); } _src_x509_skey_decoder_cCTX->hbuf += clen; _src_x509_skey_decoder_cCTX->hlen -= clen; T0_PUSH(addr + clen); T0_PUSH(len - clen); } break; case 27: { /* read8-low */ if (_src_x509_skey_decoder_cCTX->hlen == 0) { T0_PUSHi(-1); } else { _src_x509_skey_decoder_cCTX->hlen --; T0_PUSH(*_src_x509_skey_decoder_cCTX->hbuf ++); } } break; case 28: { /* rot */ T0_ROT(); } break; case 29: { /* set-ec-key */ size_t xlen = T0_POP(); uint32_t curve = T0_POP(); _src_x509_skey_decoder_cCTX->key.ec.curve = curve; _src_x509_skey_decoder_cCTX->key.ec.x = _src_x509_skey_decoder_cCTX->key_data; _src_x509_skey_decoder_cCTX->key.ec.xlen = xlen; } break; case 30: { /* set-rsa-key */ size_t iqlen = T0_POP(); size_t dqlen = T0_POP(); size_t dplen = T0_POP(); size_t qlen = T0_POP(); size_t plen = T0_POP(); uint32_t n_bitlen = T0_POP(); size_t off; _src_x509_skey_decoder_cCTX->key.rsa.n_bitlen = n_bitlen; _src_x509_skey_decoder_cCTX->key.rsa.p = _src_x509_skey_decoder_cCTX->key_data; _src_x509_skey_decoder_cCTX->key.rsa.plen = plen; off = plen; _src_x509_skey_decoder_cCTX->key.rsa.q = _src_x509_skey_decoder_cCTX->key_data + off; _src_x509_skey_decoder_cCTX->key.rsa.qlen = qlen; off += qlen; _src_x509_skey_decoder_cCTX->key.rsa.dp = _src_x509_skey_decoder_cCTX->key_data + off; _src_x509_skey_decoder_cCTX->key.rsa.dplen = dplen; off += dplen; _src_x509_skey_decoder_cCTX->key.rsa.dq = _src_x509_skey_decoder_cCTX->key_data + off; _src_x509_skey_decoder_cCTX->key.rsa.dqlen = dqlen; off += dqlen; _src_x509_skey_decoder_cCTX->key.rsa.iq = _src_x509_skey_decoder_cCTX->key_data + off; _src_x509_skey_decoder_cCTX->key.rsa.iqlen = iqlen; } break; case 31: { /* set8 */ uint32_t addr = T0_POP(); *((unsigned char *)_src_x509_skey_decoder_cCTX + addr) = (unsigned char)T0_POP(); } break; case 32: { /* swap */ T0_SWAP(); } break; case 33: { /* u>> */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x >> c); } break; } } else { _src_x509_skey_decoder_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_x509_skey_decoder_ct0_context *)t0ctx)->dp = dp; ((_src_x509_skey_decoder_ct0_context *)t0ctx)->rp = rp; ((_src_x509_skey_decoder_ct0_context *)t0ctx)->ip = ip; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_x509_x509_decoder_ct0_context; static uint32_t _src_x509_x509_decoder_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_x509_x509_decoder_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char _src_x509_x509_decoder_ct0_datablock[]; */ void br_x509_decoder_init_main(void *t0ctx); void br_x509_decoder_run(void *t0ctx); #define _src_x509_x509_decoder_cCTX ((br_x509_decoder_context *)(void *)((unsigned char *)t0ctx - offsetof(br_x509_decoder_context, cpu))) #define _src_x509_x509_decoder_cCONTEXT_NAME br_x509_decoder_context /* see bearssl_x509.h */ void br_x509_decoder_init(br_x509_decoder_context *ctx, void (*append_dn)(void *ctx, const void *buf, size_t len), void *append_dn_ctx) { memset(ctx, 0, sizeof *ctx); /* obsolete ctx->err = 0; ctx->hbuf = NULL; ctx->hlen = 0; */ ctx->append_dn = append_dn; ctx->append_dn_ctx = append_dn_ctx; ctx->cpu.dp = &ctx->dp_stack[0]; ctx->cpu.rp = &ctx->rp_stack[0]; br_x509_decoder_init_main(&ctx->cpu); br_x509_decoder_run(&ctx->cpu); } /* see bearssl_x509.h */ void br_x509_decoder_push(br_x509_decoder_context *ctx, const void *data, size_t len) { ctx->hbuf = (const unsigned char*)data; ctx->hlen = len; br_x509_decoder_run(&ctx->cpu); } static const unsigned char _src_x509_x509_decoder_ct0_datablock[] = { 0x00, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x05, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0E, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0B, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0C, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0D, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x02, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x22, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x23, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x02, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x03, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x04, 0x00, 0x1F, 0x03, 0xFC, 0x07, 0x7F, 0x0B, 0x5E, 0x0F, 0x1F, 0x12, 0xFE, 0x16, 0xBF, 0x1A, 0x9F, 0x1E, 0x7E, 0x22, 0x3F, 0x26, 0x1E, 0x29, 0xDF, 0x00, 0x1F, 0x03, 0xFD, 0x07, 0x9F, 0x0B, 0x7E, 0x0F, 0x3F, 0x13, 0x1E, 0x16, 0xDF, 0x1A, 0xBF, 0x1E, 0x9E, 0x22, 0x5F, 0x26, 0x3E, 0x29, 0xFF, 0x03, 0x55, 0x1D, 0x13 }; static const unsigned char _src_x509_x509_decoder_ct0_codeblock[] = { 0x00, 0x01, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x11, 0x00, 0x00, 0x01, 0x01, 0x09, 0x00, 0x00, 0x01, 0x01, 0x0A, 0x00, 0x00, 0x1A, 0x1A, 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_BOOLEAN), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_CLASS), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_VALUE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TIME), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_EXTRA_ELEMENT), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INDEFINITE_LENGTH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INNER_TRUNC), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_LIMIT_EXCEEDED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_CONSTRUCTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_PRIMITIVE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_OVERFLOW), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_PARTIAL_BYTE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNEXPECTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNSUPPORTED), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_EC), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_RSA), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, copy_dn)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, decoded)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, isCA)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_x509_decoder_context, pkey_data)), 0x01, T0_INT2(BR_X509_BUFSIZE_KEY), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, notafter_days)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, notafter_seconds)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, notbefore_days)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, notbefore_seconds)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, pad)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, signer_hash_id)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_decoder_cCONTEXT_NAME, signer_key_type)), 0x00, 0x00, 0x01, 0x80, 0x45, 0x00, 0x00, 0x01, 0x80, 0x4E, 0x00, 0x00, 0x01, 0x80, 0x54, 0x00, 0x00, 0x01, 0x81, 0x36, 0x00, 0x02, 0x03, 0x00, 0x03, 0x01, 0x1B, 0x02, 0x01, 0x13, 0x26, 0x02, 0x00, 0x0F, 0x15, 0x00, 0x00, 0x05, 0x02, 0x34, 0x1D, 0x00, 0x00, 0x06, 0x02, 0x35, 0x1D, 0x00, 0x00, 0x01, 0x10, 0x4F, 0x00, 0x00, 0x11, 0x05, 0x02, 0x38, 0x1D, 0x4C, 0x00, 0x00, 0x11, 0x05, 0x02, 0x38, 0x1D, 0x4D, 0x00, 0x00, 0x06, 0x02, 0x30, 0x1D, 0x00, 0x00, 0x1B, 0x19, 0x01, 0x08, 0x0E, 0x26, 0x29, 0x19, 0x09, 0x00, 0x00, 0x01, 0x30, 0x0A, 0x1B, 0x01, 0x00, 0x01, 0x09, 0x4B, 0x05, 0x02, 0x2F, 0x1D, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x01, 0x80, 0x5A, 0x00, 0x00, 0x01, 0x80, 0x62, 0x00, 0x00, 0x01, 0x80, 0x6B, 0x00, 0x00, 0x01, 0x80, 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0x01, 0x21, 0x5B, 0x01, 0x22, 0x5B, 0x1B, 0x01, 0x23, 0x11, 0x06, 0x28, 0x1A, 0x4C, 0x6B, 0x6D, 0x1B, 0x06, 0x1D, 0x6D, 0x60, 0x1A, 0x70, 0x1B, 0x01, 0x01, 0x11, 0x06, 0x03, 0x63, 0x1A, 0x70, 0x01, 0x04, 0x50, 0x6B, 0x4A, 0x1C, 0x06, 0x03, 0x5F, 0x04, 0x01, 0x7B, 0x51, 0x51, 0x04, 0x60, 0x51, 0x51, 0x04, 0x08, 0x01, 0x7F, 0x11, 0x05, 0x02, 0x38, 0x1D, 0x1A, 0x51, 0x6D, 0x60, 0x06, 0x80, 0x63, 0x75, 0x1C, 0x06, 0x06, 0x01, 0x02, 0x3B, 0x04, 0x80, 0x57, 0x76, 0x1C, 0x06, 0x06, 0x01, 0x03, 0x3B, 0x04, 0x80, 0x4D, 0x77, 0x1C, 0x06, 0x06, 0x01, 0x04, 0x3B, 0x04, 0x80, 0x43, 0x78, 0x1C, 0x06, 0x05, 0x01, 0x05, 0x3B, 0x04, 0x3A, 0x79, 0x1C, 0x06, 0x05, 0x01, 0x06, 0x3B, 0x04, 0x31, 0x55, 0x1C, 0x06, 0x05, 0x01, 0x02, 0x3A, 0x04, 0x28, 0x56, 0x1C, 0x06, 0x05, 0x01, 0x03, 0x3A, 0x04, 0x1F, 0x57, 0x1C, 0x06, 0x05, 0x01, 0x04, 0x3A, 0x04, 0x16, 0x58, 0x1C, 0x06, 0x05, 0x01, 0x05, 0x3A, 0x04, 0x0D, 0x59, 0x1C, 0x06, 0x05, 0x01, 0x06, 0x3A, 0x04, 0x04, 0x01, 0x00, 0x01, 0x00, 0x04, 0x04, 0x01, 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0x00, 0x2A, 0x03, 0x00, 0x1B, 0x01, 0x83, 0xFF, 0xFF, 0x7F, 0x12, 0x06, 0x02, 0x32, 0x1D, 0x01, 0x08, 0x0E, 0x26, 0x72, 0x23, 0x09, 0x04, 0x60, 0x00, 0x00, 0x6A, 0x5E, 0x00, 0x00, 0x6B, 0x7A, 0x00, 0x00, 0x70, 0x4E, 0x6B, 0x00, 0x01, 0x6B, 0x1B, 0x05, 0x02, 0x36, 0x1D, 0x72, 0x1B, 0x01, 0x81, 0x00, 0x13, 0x06, 0x02, 0x36, 0x1D, 0x03, 0x00, 0x1B, 0x06, 0x16, 0x72, 0x02, 0x00, 0x1B, 0x01, 0x87, 0xFF, 0xFF, 0x7F, 0x13, 0x06, 0x02, 0x36, 0x1D, 0x01, 0x08, 0x0E, 0x09, 0x03, 0x00, 0x04, 0x67, 0x1A, 0x02, 0x00, 0x00, 0x00, 0x6B, 0x1B, 0x01, 0x81, 0x7F, 0x12, 0x06, 0x08, 0x7A, 0x01, 0x00, 0x44, 0x25, 0x01, 0x00, 0x00, 0x1B, 0x44, 0x25, 0x44, 0x29, 0x62, 0x01, 0x7F, 0x00, 0x01, 0x72, 0x03, 0x00, 0x02, 0x00, 0x01, 0x05, 0x14, 0x01, 0x01, 0x15, 0x1E, 0x02, 0x00, 0x01, 0x06, 0x14, 0x1B, 0x01, 0x01, 0x15, 0x06, 0x02, 0x2D, 0x1D, 0x01, 0x04, 0x0E, 0x02, 0x00, 0x01, 0x1F, 0x15, 0x1B, 0x01, 0x1F, 0x11, 0x06, 0x02, 0x2E, 0x1D, 0x09, 0x00, 0x00, 0x1B, 0x05, 0x05, 0x01, 0x00, 0x01, 0x7F, 0x00, 0x70, 0x00, 0x00, 0x1B, 0x05, 0x02, 0x32, 0x1D, 0x2A, 0x73, 0x00, 0x00, 0x22, 0x1B, 0x01, 0x00, 0x13, 0x06, 0x01, 0x00, 0x1A, 0x16, 0x04, 0x74, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x0B, 0x00, 0x00, 0x01, 0x15, 0x00, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x01, 0x29, 0x00, 0x00, 0x01, 0x33, 0x00, 0x00, 0x7B, 0x1A, 0x00, 0x00, 0x1B, 0x06, 0x07, 0x7C, 0x1B, 0x06, 0x01, 0x16, 0x04, 0x76, 0x00, 0x00, 0x01, 0x00, 0x20, 0x21, 0x0B, 0x2B, 0x00 }; static const uint16_t _src_x509_x509_decoder_ct0_caddr[] = { 0, 5, 10, 15, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 93, 98, 103, 111, 116, 121, 126, 131, 136, 141, 146, 151, 156, 161, 166, 181, 187, 193, 198, 206, 214, 220, 231, 246, 250, 255, 260, 265, 270, 275, 279, 289, 620, 625, 639, 659, 666, 678, 692, 707, 740, 960, 974, 991, 1000, 1067, 1123, 1127, 1131, 1136, 1184, 1210, 1254, 1265, 1274, 1287, 1291, 1295, 1299, 1303, 1307, 1311, 1315, 1327 }; #define _src_x509_x509_decoder_cT0_INTERPRETED 39 #define _src_x509_x509_decoder_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &_src_x509_x509_decoder_ct0_codeblock[_src_x509_x509_decoder_ct0_caddr[(slot) - _src_x509_x509_decoder_cT0_INTERPRETED]]; \ t0_lnum = _src_x509_x509_decoder_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &_src_x509_x509_decoder_ct0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define _src_x509_x509_decoder_cT0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_x509_x509_decoder_ct0_context *t0ctx =(_src_x509_x509_decoder_ct0_context*)ctx; \ t0ctx->ip = &_src_x509_x509_decoder_ct0_codeblock[0]; \ _src_x509_x509_decoder_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } _src_x509_x509_decoder_cT0_DEFENTRY(br_x509_decoder_init_main, 92) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_x509_decoder_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_x509_x509_decoder_ct0_context *)t0ctx)->dp; rp = ((_src_x509_x509_decoder_ct0_context *)t0ctx)->rp; ip = ((_src_x509_x509_decoder_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_x509_x509_decoder_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &_src_x509_x509_decoder_ct0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_x509_x509_decoder_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_x509_x509_decoder_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_x509_x509_decoder_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_x509_x509_decoder_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_x509_x509_decoder_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_x509_x509_decoder_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* %25 */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSHi(a % b); } break; case 8: { /* * */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a * b); } break; case 9: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 10: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 11: { /* -rot */ T0_NROT(); } break; case 12: { /* / */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSHi(a / b); } break; case 13: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 14: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 15: { /* <= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a <= b)); } break; case 16: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 17: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 18: { /* > */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a > b)); } break; case 19: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 20: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 21: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 22: { /* co */ T0_CO(); } break; case 23: { /* copy-ec-pkey */ size_t qlen = T0_POP(); uint32_t curve = T0_POP(); _src_x509_x509_decoder_cCTX->pkey.key_type = BR_KEYTYPE_EC; _src_x509_x509_decoder_cCTX->pkey.key.ec.curve = curve; _src_x509_x509_decoder_cCTX->pkey.key.ec.q = _src_x509_x509_decoder_cCTX->pkey_data; _src_x509_x509_decoder_cCTX->pkey.key.ec.qlen = qlen; } break; case 24: { /* copy-rsa-pkey */ size_t elen = T0_POP(); size_t nlen = T0_POP(); _src_x509_x509_decoder_cCTX->pkey.key_type = BR_KEYTYPE_RSA; _src_x509_x509_decoder_cCTX->pkey.key.rsa.n = _src_x509_x509_decoder_cCTX->pkey_data; _src_x509_x509_decoder_cCTX->pkey.key.rsa.nlen = nlen; _src_x509_x509_decoder_cCTX->pkey.key.rsa.e = _src_x509_x509_decoder_cCTX->pkey_data + nlen; _src_x509_x509_decoder_cCTX->pkey.key.rsa.elen = elen; } break; case 25: { /* data-get8 */ size_t addr = T0_POP(); T0_PUSH(_src_x509_x509_decoder_ct0_datablock[addr]); } break; case 26: { /* drop */ (void)T0_POP(); } break; case 27: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 28: { /* eqOID */ const unsigned char *a2 = &_src_x509_x509_decoder_ct0_datablock[T0_POP()]; const unsigned char *a1 = &_src_x509_x509_decoder_cCTX->pad[0]; size_t len = a1[0]; int x; if (len == a2[0]) { x = -(memcmp(a1 + 1, a2 + 1, len) == 0); } else { x = 0; } T0_PUSH((uint32_t)x); } break; case 29: { /* fail */ _src_x509_x509_decoder_cCTX->err = T0_POPi(); T0_CO(); } break; case 30: { /* neg */ uint32_t a = T0_POP(); T0_PUSH(-a); } break; case 31: { /* or */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a | b); } break; case 32: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 33: { /* read-blob-inner */ uint32_t len = T0_POP(); uint32_t addr = T0_POP(); size_t clen = _src_x509_x509_decoder_cCTX->hlen; if (clen > len) { clen = (size_t)len; } if (addr != 0) { memcpy((unsigned char *)_src_x509_x509_decoder_cCTX + addr, _src_x509_x509_decoder_cCTX->hbuf, clen); } if (_src_x509_x509_decoder_cCTX->copy_dn && _src_x509_x509_decoder_cCTX->append_dn) { _src_x509_x509_decoder_cCTX->append_dn(_src_x509_x509_decoder_cCTX->append_dn_ctx, _src_x509_x509_decoder_cCTX->hbuf, clen); } _src_x509_x509_decoder_cCTX->hbuf += clen; _src_x509_x509_decoder_cCTX->hlen -= clen; T0_PUSH(addr + clen); T0_PUSH(len - clen); } break; case 34: { /* read8-low */ if (_src_x509_x509_decoder_cCTX->hlen == 0) { T0_PUSHi(-1); } else { unsigned char x = *_src_x509_x509_decoder_cCTX->hbuf ++; if (_src_x509_x509_decoder_cCTX->copy_dn && _src_x509_x509_decoder_cCTX->append_dn) { _src_x509_x509_decoder_cCTX->append_dn(_src_x509_x509_decoder_cCTX->append_dn_ctx, &x, 1); } _src_x509_x509_decoder_cCTX->hlen --; T0_PUSH(x); } } break; case 35: { /* rot */ T0_ROT(); } break; case 36: { /* set32 */ uint32_t addr = T0_POP(); *(uint32_t *)(void *)((unsigned char *)_src_x509_x509_decoder_cCTX + addr) = T0_POP(); } break; case 37: { /* set8 */ uint32_t addr = T0_POP(); *((unsigned char *)_src_x509_x509_decoder_cCTX + addr) = (unsigned char)T0_POP(); } break; case 38: { /* swap */ T0_SWAP(); } break; } } else { _src_x509_x509_decoder_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_x509_x509_decoder_ct0_context *)t0ctx)->dp = dp; ((_src_x509_x509_decoder_ct0_context *)t0ctx)->rp = rp; ((_src_x509_x509_decoder_ct0_context *)t0ctx)->ip = ip; } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_x509.h */ void br_x509_knownkey_init_rsa(br_x509_knownkey_context *ctx, const br_rsa_public_key *pk, unsigned usages) { ctx->vtable = &br_x509_knownkey_vtable; ctx->pkey.key_type = BR_KEYTYPE_RSA; ctx->pkey.key.rsa = *pk; ctx->usages = usages; } /* see bearssl_x509.h */ void br_x509_knownkey_init_ec(br_x509_knownkey_context *ctx, const br_ec_public_key *pk, unsigned usages) { ctx->vtable = &br_x509_knownkey_vtable; ctx->pkey.key_type = BR_KEYTYPE_EC; ctx->pkey.key.ec = *pk; ctx->usages = usages; } static void kk_start_chain(const br_x509_class **ctx, const char *server_name) { (void)ctx; (void)server_name; } static void kk_start_cert(const br_x509_class **ctx, uint32_t length) { (void)ctx; (void)length; } static void kk_append(const br_x509_class **ctx, const unsigned char *buf, size_t len) { (void)ctx; (void)buf; (void)len; } static void kk_end_cert(const br_x509_class **ctx) { (void)ctx; } static unsigned kk_end_chain(const br_x509_class **ctx) { (void)ctx; return 0; } static const br_x509_pkey * kk_get_pkey(const br_x509_class *const *ctx, unsigned *usages) { const br_x509_knownkey_context *xc; xc = (const br_x509_knownkey_context *)ctx; if (usages != NULL) { *usages = xc->usages; } return &xc->pkey; } /* see bearssl_x509.h */ const br_x509_class br_x509_knownkey_vtable = { sizeof(br_x509_knownkey_context), kk_start_chain, kk_start_cert, kk_append, kk_end_cert, kk_end_chain, kk_get_pkey }; //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* Automatically generated code; do not modify directly. */ #include #include typedef struct { uint32_t *dp; uint32_t *rp; const unsigned char *ip; } _src_x509_x509_minimal_ct0_context; static uint32_t _src_x509_x509_minimal_ct0_parse7E_unsigned(const unsigned char **p) { uint32_t x; x = 0; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { return x; } } } static int32_t _src_x509_x509_minimal_ct0_parse7E_signed(const unsigned char **p) { int neg; uint32_t x; neg = ((**p) >> 6) & 1; x = (uint32_t)-neg; for (;;) { unsigned y; y = *(*p) ++; x = (x << 7) | (uint32_t)(y & 0x7F); if (y < 0x80) { if (neg) { return -(int32_t)~x - 1; } else { return (int32_t)x; } } } } #define T0_VBYTE(x, n) (unsigned char)((((uint32_t)(x) >> (n)) & 0x7F) | 0x80) #define T0_FBYTE(x, n) (unsigned char)(((uint32_t)(x) >> (n)) & 0x7F) #define T0_SBYTE(x) (unsigned char)((((uint32_t)(x) >> 28) + 0xF8) ^ 0xF8) #define T0_INT1(x) T0_FBYTE(x, 0) #define T0_INT2(x) T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT3(x) T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT4(x) T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) #define T0_INT5(x) T0_SBYTE(x), T0_VBYTE(x, 21), T0_VBYTE(x, 14), T0_VBYTE(x, 7), T0_FBYTE(x, 0) /* static const unsigned char _src_x509_x509_minimal_ct0_datablock[]; */ void br_x509_minimal_init_main(void *t0ctx); void br_x509_minimal_run(void *t0ctx); /* * Implementation Notes * -------------------- * * The C code pushes the data by chunks; all decoding is done in the * T0 code. The cert_length value is set to the certificate length when * a new certificate is started; the T0 code picks it up as outer limit, * and decoding functions use it to ensure that no attempt is made at * reading past it. The T0 code also checks that once the certificate is * decoded, there are no trailing bytes. * * The T0 code sets cert_length to 0 when the certificate is fully * decoded. * * The C code must still perform two checks: * * -- If the certificate length is 0, then the T0 code will not be * invoked at all. This invalid condition must thus be reported by the * C code. * * -- When reaching the end of certificate, the C code must verify that * the certificate length has been set to 0, thereby signaling that * the T0 code properly decoded a certificate. * * Processing of a chain works in the following way: * * -- The error flag is set to a non-zero value when validation is * finished. The value is either BR_ERR_X509_OK (validation is * successful) or another non-zero error code. When a non-zero error * code is obtained, the remaining bytes in the current certificate and * the subsequent certificates (if any) are completely ignored. * * -- Each certificate is decoded in due course, with the following * "interesting points": * * -- Start of the TBS: the multihash engine is reset and activated. * * -- Start of the issuer DN: the secondary hash engine is started, * to process the encoded issuer DN. * * -- End of the issuer DN: the secondary hash engine is stopped. The * resulting hash value is computed and then copied into the * next_dn_hash[] buffer. * * -- Start of the subject DN: the secondary hash engine is started, * to process the encoded subject DN. * * -- For the EE certificate only: the Common Name, if any, is matched * against the expected server name. * * -- End of the subject DN: the secondary hash engine is stopped. The * resulting hash value is computed into the pad. It is then processed: * * -- If this is the EE certificate, then the hash is ignored * (except for direct trust processing, see later; the hash is * simply left in current_dn_hash[]). * * -- Otherwise, the hashed subject DN is compared with the saved * hash value (in saved_dn_hash[]). They must match. * * Either way, the next_dn_hash[] value is then copied into the * saved_dn_hash[] value. Thus, at that point, saved_dn_hash[] * contains the hash of the issuer DN for the current certificate, * and current_dn_hash[] contains the hash of the subject DN for the * current certificate. * * -- Public key: it is decoded into the cert_pkey[] buffer. Unknown * key types are reported at that point. * * -- If this is the EE certificate, then the key type is compared * with the expected key type (initialization parameter). The public * key data is copied to ee_pkey_data[]. The key and hashed subject * DN are also compared with the "direct trust" keys; if the key * and DN are matched, then validation ends with a success. * * -- Otherwise, the saved signature (cert_sig[]) is verified * against the saved TBS hash (tbs_hash[]) and that freshly * decoded public key. Failure here ends validation with an error. * * -- Extensions: extension values are processed in due order. * * -- Basic Constraints: for all certificates except EE, must be * present, indicate a CA, and have a path length compatible with * the chain length so far. * * -- Key Usage: for the EE, if present, must allow signatures * or encryption/key exchange, as required for the cipher suite. * For non-EE, if present, must have the "certificate sign" bit. * * -- Subject Alt Name: for the EE, dNSName names are matched * against the server name. Ignored for non-EE. * * -- Authority Key Identifier, Subject Key Identifier, Issuer * Alt Name, Subject Directory Attributes, CRL Distribution Points * Freshest CRL, Authority Info Access and Subject Info Access * extensions are always ignored: they either contain only * informative data, or they relate to revocation processing, which * we explicitly do not support. * * -- All other extensions are ignored if non-critical. If a * critical extension other than the ones above is encountered, * then a failure is reported. * * -- End of the TBS: the multihash engine is stopped. * * -- Signature algorithm: the signature algorithm on the * certificate is decoded. A failure is reported if that algorithm * is unknown. The hashed TBS corresponding to the signature hash * function is computed and stored in tbs_hash[] (if not supported, * then a failure is reported). The hash OID and length are stored * in cert_sig_hash_oid and cert_sig_hash_len. * * -- Signature value: the signature value is copied into the * cert_sig[] array. * * -- Certificate end: the hashed issuer DN (saved_dn_hash[]) is * looked up in the trust store (CA trust anchors only); for all * that match, the signature (cert_sig[]) is verified against the * anchor public key (hashed TBS is in tbs_hash[]). If one of these * signatures is valid, then validation ends with a success. * * -- If the chain end is reached without obtaining a validation success, * then validation is reported as failed. */ #if BR_USE_UNIX_TIME #include #endif #if BR_USE_WIN32_TIME #include #endif /* * The T0 compiler will produce these prototypes declarations in the * header. * void br_x509_minimal_init_main(void *ctx); void br_x509_minimal_run(void *ctx); */ /* see bearssl_x509.h */ void br_x509_minimal_init(br_x509_minimal_context *ctx, const br_hash_class *dn_hash_impl, const br_x509_trust_anchor *trust_anchors, size_t trust_anchors_num) { memset(ctx, 0, sizeof *ctx); ctx->vtable = &br_x509_minimal_vtable; ctx->dn_hash_impl = dn_hash_impl; ctx->trust_anchors = trust_anchors; ctx->trust_anchors_num = trust_anchors_num; } static void xm_start_chain(const br_x509_class **ctx, const char *server_name) { br_x509_minimal_context *cc; size_t u; cc = (br_x509_minimal_context *)(void *)ctx; for (u = 0; u < cc->num_name_elts; u ++) { cc->name_elts[u].status = 0; cc->name_elts[u].buf[0] = 0; } memset(&cc->pkey, 0, sizeof cc->pkey); cc->num_certs = 0; cc->err = 0; cc->cpu.dp = cc->dp_stack; cc->cpu.rp = cc->rp_stack; br_x509_minimal_init_main(&cc->cpu); if (server_name == NULL || *server_name == 0) { cc->server_name = NULL; } else { cc->server_name = server_name; } } static void xm_start_cert(const br_x509_class **ctx, uint32_t length) { br_x509_minimal_context *cc; cc = (br_x509_minimal_context *)(void *)ctx; if (cc->err != 0) { return; } if (length == 0) { cc->err = BR_ERR_X509_TRUNCATED; return; } cc->cert_length = length; } static void xm_append(const br_x509_class **ctx, const unsigned char *buf, size_t len) { br_x509_minimal_context *cc; cc = (br_x509_minimal_context *)(void *)ctx; if (cc->err != 0) { return; } cc->hbuf = buf; cc->hlen = len; br_x509_minimal_run(&cc->cpu); } static void xm_end_cert(const br_x509_class **ctx) { br_x509_minimal_context *cc; cc = (br_x509_minimal_context *)(void *)ctx; if (cc->err == 0 && cc->cert_length != 0) { cc->err = BR_ERR_X509_TRUNCATED; } cc->num_certs ++; } static unsigned xm_end_chain(const br_x509_class **ctx) { br_x509_minimal_context *cc; cc = (br_x509_minimal_context *)(void *)ctx; if (cc->err == 0) { if (cc->num_certs == 0) { cc->err = BR_ERR_X509_EMPTY_CHAIN; } else { cc->err = BR_ERR_X509_NOT_TRUSTED; } } else if (cc->err == BR_ERR_X509_OK) { return 0; } return (unsigned)cc->err; } static const br_x509_pkey * xm_get_pkey(const br_x509_class *const *ctx, unsigned *usages) { br_x509_minimal_context *cc; cc = (br_x509_minimal_context *)(void *)ctx; if (cc->err == BR_ERR_X509_OK || cc->err == BR_ERR_X509_NOT_TRUSTED) { if (usages != NULL) { *usages = cc->key_usages; } return &((br_x509_minimal_context *)(void *)ctx)->pkey; } else { return NULL; } } /* see bearssl_x509.h */ const br_x509_class br_x509_minimal_vtable = { sizeof(br_x509_minimal_context), xm_start_chain, xm_start_cert, xm_append, xm_end_cert, xm_end_chain, xm_get_pkey }; #define _src_x509_x509_minimal_cCTX ((br_x509_minimal_context *)(void *)((unsigned char *)t0ctx - offsetof(br_x509_minimal_context, cpu))) #define _src_x509_x509_minimal_cCONTEXT_NAME br_x509_minimal_context #define DNHASH_LEN ((_src_x509_x509_minimal_cCTX->dn_hash_impl->desc >> BR_HASHDESC_OUT_OFF) & BR_HASHDESC_OUT_MASK) /* * Hash a DN (from a trust anchor) into the provided buffer. This uses the * DN hash implementation and context structure from the X.509 engine * context. */ static void hash_dn(br_x509_minimal_context *ctx, const void *dn, size_t len, unsigned char *out) { ctx->dn_hash_impl->init(&ctx->dn_hash.vtable); ctx->dn_hash_impl->update(&ctx->dn_hash.vtable, dn, len); ctx->dn_hash_impl->out(&ctx->dn_hash.vtable, out); } /* * Compare two big integers for equality. The integers use unsigned big-endian * encoding; extra leading bytes (of value 0) are allowed. */ static int eqbigint(const unsigned char *b1, size_t len1, const unsigned char *b2, size_t len2) { while (len1 > 0 && *b1 == 0) { b1 ++; len1 --; } while (len2 > 0 && *b2 == 0) { b2 ++; len2 --; } if (len1 != len2) { return 0; } return memcmp(b1, b2, len1) == 0; } /* * Compare two strings for equality, in a case-insensitive way. This * function handles casing only for ASCII letters. */ static int eqnocase(const void *s1, const void *s2, size_t len) { const unsigned char *buf1, *buf2; buf1 = (const unsigned char*)s1; buf2 = (const unsigned char*)s2; while (len -- > 0) { int x1, x2; x1 = *buf1 ++; x2 = *buf2 ++; if (x1 >= 'A' && x1 <= 'Z') { x1 += 'a' - 'A'; } if (x2 >= 'A' && x2 <= 'Z') { x2 += 'a' - 'A'; } if (x1 != x2) { return 0; } } return 1; } static int verify_signature(br_x509_minimal_context *ctx, const br_x509_pkey *pk); static const unsigned char _src_x509_x509_minimal_ct0_datablock[] = { 0x00, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x05, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0E, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0B, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0C, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0D, 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x02, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x22, 0x05, 0x2B, 0x81, 0x04, 0x00, 0x23, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x01, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x02, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x03, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x04, 0x03, 0x55, 0x04, 0x03, 0x00, 0x1F, 0x03, 0xFC, 0x07, 0x7F, 0x0B, 0x5E, 0x0F, 0x1F, 0x12, 0xFE, 0x16, 0xBF, 0x1A, 0x9F, 0x1E, 0x7E, 0x22, 0x3F, 0x26, 0x1E, 0x29, 0xDF, 0x00, 0x1F, 0x03, 0xFD, 0x07, 0x9F, 0x0B, 0x7E, 0x0F, 0x3F, 0x13, 0x1E, 0x16, 0xDF, 0x1A, 0xBF, 0x1E, 0x9E, 0x22, 0x5F, 0x26, 0x3E, 0x29, 0xFF, 0x03, 0x55, 0x1D, 0x13, 0x03, 0x55, 0x1D, 0x0F, 0x03, 0x55, 0x1D, 0x11, 0x03, 0x55, 0x1D, 0x20, 0x08, 0x2B, 0x06, 0x01, 0x05, 0x05, 0x07, 0x02, 0x01, 0x03, 0x55, 0x1D, 0x23, 0x03, 0x55, 0x1D, 0x0E, 0x03, 0x55, 0x1D, 0x12, 0x03, 0x55, 0x1D, 0x09, 0x03, 0x55, 0x1D, 0x1F, 0x03, 0x55, 0x1D, 0x2E, 0x08, 0x2B, 0x06, 0x01, 0x05, 0x05, 0x07, 0x01, 0x01, 0x08, 0x2B, 0x06, 0x01, 0x05, 0x05, 0x07, 0x01, 0x0B }; static const unsigned char _src_x509_x509_minimal_ct0_codeblock[] = { 0x00, 0x01, 0x00, 0x0D, 0x00, 0x00, 0x01, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x11, 0x00, 0x00, 0x01, 0x01, 0x09, 0x00, 0x00, 0x01, 0x01, 0x0A, 0x00, 0x00, 0x25, 0x25, 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_BOOLEAN), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_DN), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_SERVER_NAME), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_CLASS), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TAG_VALUE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_BAD_TIME), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_CRITICAL_EXTENSION), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_DN_MISMATCH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_EXPIRED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_EXTRA_ELEMENT), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_FORBIDDEN_KEY_USAGE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INDEFINITE_LENGTH), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_INNER_TRUNC), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_LIMIT_EXCEEDED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_CA), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_CONSTRUCTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_NOT_PRIMITIVE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_OVERFLOW), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_PARTIAL_BYTE), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNEXPECTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_UNSUPPORTED), 0x00, 0x00, 0x01, T0_INT1(BR_ERR_X509_WEAK_PUBLIC_KEY), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_EC), 0x00, 0x00, 0x01, T0_INT1(BR_KEYTYPE_RSA), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_length)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_sig)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_sig_hash_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_sig_hash_oid)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_sig_len)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, cert_signer_key_type)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, current_dn_hash)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, key_usages)), 0x00, 0x00, 0x01, T0_INT2(offsetof(br_x509_minimal_context, pkey_data)), 0x01, T0_INT2(BR_X509_BUFSIZE_KEY), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, min_rsa_size)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, next_dn_hash)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, num_certs)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, pad)), 0x00, 0x00, 0x01, T0_INT2(offsetof(_src_x509_x509_minimal_cCONTEXT_NAME, saved_dn_hash)), 0x00, 0x00, 0x01, 0x80, 0x73, 0x00, 0x00, 0x01, 0x80, 0x7C, 0x00, 0x00, 0x01, 0x81, 0x02, 0x00, 0x00, 0x8F, 0x05, 0x05, 0x33, 0x41, 0x01, 0x00, 0x00, 0x33, 0x01, 0x0A, 0x0E, 0x09, 0x01, 0x9A, 0xFF, 0xB8, 0x00, 0x0A, 0x00, 0x00, 0x01, 0x82, 0x19, 0x00, 0x00, 0x01, 0x82, 0x01, 0x00, 0x00, 0x01, 0x81, 0x68, 0x00, 0x02, 0x03, 0x00, 0x03, 0x01, 0x26, 0x02, 0x01, 0x13, 0x3A, 0x02, 0x00, 0x0F, 0x15, 0x00, 0x00, 0x01, 0x81, 0x74, 0x00, 0x00, 0x05, 0x02, 0x51, 0x29, 0x00, 0x00, 0x06, 0x02, 0x52, 0x29, 0x00, 0x00, 0x01, 0x10, 0x74, 0x00, 0x00, 0x11, 0x05, 0x02, 0x55, 0x29, 0x71, 0x00, 0x00, 0x11, 0x05, 0x02, 0x55, 0x29, 0x72, 0x00, 0x00, 0x06, 0x02, 0x4B, 0x29, 0x00, 0x00, 0x01, 0x82, 0x11, 0x00, 0x00, 0x26, 0x21, 0x01, 0x08, 0x0E, 0x3A, 0x3F, 0x21, 0x09, 0x00, 0x0B, 0x03, 0x00, 0x5A, 0x2B, 0xAC, 0x38, 0xAC, 0xB0, 0x26, 0x01, 0x20, 0x11, 0x06, 0x11, 0x25, 0x71, 0xAA, 0xB0, 0x01, 0x02, 0x75, 0xAD, 0x01, 0x02, 0x12, 0x06, 0x02, 0x56, 0x29, 0x76, 0xB0, 0x01, 0x02, 0x75, 0xAB, 0xAC, 0xBF, 0x99, 0x64, 0x60, 0x22, 0x16, 0xAC, 0xA4, 0x03, 0x01, 0x03, 0x02, 0xA4, 0x02, 0x02, 0x02, 0x01, 0x19, 0x06, 0x02, 0x4A, 0x29, 0x76, 0x02, 0x00, 0x06, 0x05, 0x9A, 0x03, 0x03, 0x04, 0x09, 0x99, 0x60, 0x67, 0x22, 0x28, 0x05, 0x02, 0x49, 0x29, 0x67, 0x64, 0x22, 0x16, 0xAC, 0xAC, 0x9B, 0x05, 0x02, 0x56, 0x29, 0xB9, 0x27, 0x06, 0x27, 0xBF, 0xA1, 0xAC, 0x62, 0xA7, 0x03, 0x05, 0x62, 0x3A, 0x02, 0x05, 0x09, 0x3A, 0x02, 0x05, 0x0A, 0xA7, 0x03, 0x06, 0x76, 0x63, 0x2A, 0x01, 0x81, 0x00, 0x09, 0x02, 0x05, 0x12, 0x06, 0x02, 0x57, 0x29, 0x76, 0x59, 0x03, 0x04, 0x04, 0x3A, 0x85, 0x27, 0x06, 0x34, 0x9B, 0x05, 0x02, 0x56, 0x29, 0x68, 0x27, 0x06, 0x04, 0x01, 0x17, 0x04, 0x12, 0x69, 0x27, 0x06, 0x04, 0x01, 0x18, 0x04, 0x0A, 0x6A, 0x27, 0x06, 0x04, 0x01, 0x19, 0x04, 0x02, 0x56, 0x29, 0x03, 0x07, 0x76, 0xA1, 0x26, 0x03, 0x08, 0x26, 0x62, 0x33, 0x0D, 0x06, 0x02, 0x4F, 0x29, 0xA2, 0x58, 0x03, 0x04, 0x04, 0x02, 0x56, 0x29, 0x76, 0x02, 0x00, 0x06, 0x21, 0x02, 0x04, 0x59, 0x30, 0x11, 0x06, 0x08, 0x25, 0x02, 0x05, 0x02, 0x06, 0x1E, 0x04, 0x10, 0x58, 0x30, 0x11, 0x06, 0x08, 0x25, 0x02, 0x07, 0x02, 0x08, 0x1D, 0x04, 0x03, 0x56, 0x29, 0x25, 0x04, 0x24, 0x02, 0x04, 0x59, 0x30, 0x11, 0x06, 0x08, 0x25, 0x02, 0x05, 0x02, 0x06, 0x24, 0x04, 0x10, 0x58, 0x30, 0x11, 0x06, 0x08, 0x25, 0x02, 0x07, 0x02, 0x08, 0x23, 0x04, 0x03, 0x56, 0x29, 0x25, 0x26, 0x06, 0x01, 0x29, 0x25, 0x01, 0x00, 0x03, 0x09, 0xB1, 0x01, 0x21, 0x8C, 0x01, 0x22, 0x8C, 0x26, 0x01, 0x23, 0x11, 0x06, 0x81, 0x26, 0x25, 0x71, 0xAA, 0xAC, 0x26, 0x06, 0x81, 0x1A, 0x01, 0x00, 0x03, 0x0A, 0xAC, 0x9B, 0x25, 0xB0, 0x26, 0x01, 0x01, 0x11, 0x06, 0x04, 0xA3, 0x03, 0x0A, 0xB0, 0x01, 0x04, 0x75, 0xAA, 0x6E, 0x27, 0x06, 0x0F, 0x02, 0x00, 0x06, 0x03, 0xC0, 0x04, 0x05, 0x96, 0x01, 0x7F, 0x03, 0x09, 0x04, 0x80, 0x6C, 0x8E, 0x27, 0x06, 0x06, 0x02, 0x00, 0x98, 0x04, 0x80, 0x62, 0xC2, 0x27, 0x06, 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0x04, 0x80, 0x53, 0xBC, 0x27, 0x06, 0x07, 0x01, 0x04, 0x59, 0x89, 0x04, 0x80, 0x48, 0xBD, 0x27, 0x06, 0x06, 0x01, 0x05, 0x59, 0x8A, 0x04, 0x3E, 0xBE, 0x27, 0x06, 0x06, 0x01, 0x06, 0x59, 0x8B, 0x04, 0x34, 0x7C, 0x27, 0x06, 0x06, 0x01, 0x02, 0x58, 0x87, 0x04, 0x2A, 0x7D, 0x27, 0x06, 0x06, 0x01, 0x03, 0x58, 0x88, 0x04, 0x20, 0x7E, 0x27, 0x06, 0x06, 0x01, 0x04, 0x58, 0x89, 0x04, 0x16, 0x7F, 0x27, 0x06, 0x06, 0x01, 0x05, 0x58, 0x8A, 0x04, 0x0C, 0x80, 0x27, 0x06, 0x06, 0x01, 0x06, 0x58, 0x8B, 0x04, 0x02, 0x56, 0x29, 0x5D, 0x34, 0x5F, 0x36, 0x1C, 0x26, 0x05, 0x02, 0x56, 0x29, 0x5C, 0x36, 0x04, 0x02, 0x56, 0x29, 0xBF, 0xA1, 0x26, 0x01, T0_INT2(BR_X509_BUFSIZE_SIG), 0x12, 0x06, 0x02, 0x4F, 0x29, 0x26, 0x5E, 0x34, 0x5B, 0xA2, 0x76, 0x76, 0x01, 0x00, 0x5A, 0x35, 0x18, 0x00, 0x00, 0x01, 0x30, 0x0A, 0x26, 0x01, 0x00, 0x01, 0x09, 0x6F, 0x05, 0x02, 0x47, 0x29, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x01, 0x81, 0x08, 0x00, 0x00, 0x01, 0x81, 0x10, 0x00, 0x00, 0x01, 0x81, 0x19, 0x00, 0x00, 0x01, 0x81, 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0x01, 0x01, 0x03, 0x00, 0x9C, 0x26, 0x01, 0x83, 0xFF, 0x7E, 0x11, 0x06, 0x16, 0x25, 0x26, 0x06, 0x10, 0x9D, 0x26, 0x05, 0x05, 0x25, 0xBF, 0x01, 0x00, 0x00, 0x02, 0x00, 0x81, 0x03, 0x00, 0x04, 0x6D, 0x04, 0x1B, 0x26, 0x05, 0x05, 0x25, 0xBF, 0x01, 0x00, 0x00, 0x02, 0x00, 0x81, 0x03, 0x00, 0x26, 0x06, 0x0B, 0x9C, 0x26, 0x05, 0x05, 0x25, 0xBF, 0x01, 0x00, 0x00, 0x04, 0x6D, 0x25, 0x02, 0x00, 0x26, 0x05, 0x01, 0x00, 0x40, 0x66, 0x36, 0x01, 0x7F, 0x00, 0x01, 0xAA, 0x01, 0x01, 0x03, 0x00, 0x26, 0x06, 0x10, 0x9E, 0x26, 0x05, 0x05, 0x25, 0xBF, 0x01, 0x00, 0x00, 0x02, 0x00, 0x81, 0x03, 0x00, 0x04, 0x6D, 0x25, 0x02, 0x00, 0x26, 0x05, 0x01, 0x00, 0x40, 0x66, 0x36, 0x01, 0x7F, 0x00, 0x01, 0xAA, 0x01, 0x01, 0x03, 0x00, 0x26, 0x06, 0x10, 0xB7, 0x26, 0x05, 0x05, 0x25, 0xBF, 0x01, 0x00, 0x00, 0x02, 0x00, 0x81, 0x03, 0x00, 0x04, 0x6D, 0x25, 0x02, 0x00, 0x26, 0x05, 0x01, 0x00, 0x40, 0x66, 0x36, 0x01, 0x7F, 0x00, 0x00, 0xB7, 0x01, 0x08, 0x0E, 0x3A, 0xB7, 0x33, 0x09, 0x00, 0x00, 0xB7, 0x3A, 0xB7, 0x01, 0x08, 0x0E, 0x33, 0x09, 0x00, 0x00, 0x26, 0x05, 0x02, 0x4E, 0x29, 0x40, 0xB8, 0x00, 0x00, 0x32, 0x26, 0x01, 0x00, 0x13, 0x06, 0x01, 0x00, 0x25, 0x1A, 0x04, 0x74, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x0B, 0x00, 0x00, 0x01, 0x15, 0x00, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x01, 0x29, 0x00, 0x00, 0x01, 0x33, 0x00, 0x00, 0xC0, 0x25, 0x00, 0x00, 0x26, 0x06, 0x07, 0xC1, 0x26, 0x06, 0x01, 0x1A, 0x04, 0x76, 0x00, 0x00, 0x01, 0x00, 0x30, 0x31, 0x0B, 0x41, 0x00, 0x00, 0x01, 0x81, 0x70, 0x00, 0x00, 0x01, 0x82, 0x0D, 0x00, 0x00, 0x01, 0x82, 0x22, 0x00, 0x00, 0x01, 0x82, 0x05, 0x00, 0x00, 0x26, 0x01, 0x83, 0xFB, 0x50, 0x01, 0x83, 0xFB, 0x6F, 0x6F, 0x06, 0x04, 0x25, 0x01, 0x00, 0x00, 0x26, 0x01, 0x83, 0xB0, 0x00, 0x01, 0x83, 0xBF, 0x7F, 0x6F, 0x06, 0x04, 0x25, 0x01, 0x00, 0x00, 0x01, 0x83, 0xFF, 0x7F, 0x15, 0x01, 0x83, 0xFF, 0x7E, 0x0D, 0x00 }; static const uint16_t _src_x509_x509_minimal_ct0_caddr[] = { 0, 5, 10, 15, 20, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 130, 135, 140, 145, 150, 155, 160, 165, 173, 178, 183, 188, 193, 198, 203, 208, 213, 234, 239, 244, 249, 264, 269, 275, 281, 286, 294, 302, 308, 313, 324, 960, 975, 979, 984, 989, 994, 999, 1004, 1118, 1123, 1135, 1140, 1145, 1150, 1154, 1159, 1164, 1169, 1174, 1184, 1189, 1194, 1206, 1221, 1226, 1240, 1262, 1273, 1376, 1423, 1456, 1547, 1553, 1616, 1623, 1651, 1679, 1784, 1826, 1839, 1851, 1865, 1880, 2100, 2114, 2131, 2140, 2207, 2263, 2267, 2271, 2276, 2324, 2350, 2426, 2470, 2481, 2566, 2604, 2642, 2652, 2662, 2671, 2684, 2688, 2692, 2696, 2700, 2704, 2708, 2712, 2724, 2732, 2737, 2742, 2747, 2752 }; #define _src_x509_x509_minimal_cT0_INTERPRETED 60 #define _src_x509_x509_minimal_cT0_ENTER(ip, rp, slot) do { \ const unsigned char *t0_newip; \ uint32_t t0_lnum; \ t0_newip = &_src_x509_x509_minimal_ct0_codeblock[_src_x509_x509_minimal_ct0_caddr[(slot) - _src_x509_x509_minimal_cT0_INTERPRETED]]; \ t0_lnum = _src_x509_x509_minimal_ct0_parse7E_unsigned(&t0_newip); \ (rp) += t0_lnum; \ *((rp) ++) = (uint32_t)((ip) - &_src_x509_x509_minimal_ct0_codeblock[0]) + (t0_lnum << 16); \ (ip) = t0_newip; \ } while (0) #define _src_x509_x509_minimal_cT0_DEFENTRY(name, slot) \ void \ name(void *ctx) \ { \ _src_x509_x509_minimal_ct0_context *t0ctx =(_src_x509_x509_minimal_ct0_context*)ctx; \ t0ctx->ip = &_src_x509_x509_minimal_ct0_codeblock[0]; \ _src_x509_x509_minimal_cT0_ENTER(t0ctx->ip, t0ctx->rp, slot); \ } _src_x509_x509_minimal_cT0_DEFENTRY(br_x509_minimal_init_main, 144) #define T0_NEXT(t0ipp) (*(*(t0ipp)) ++) void br_x509_minimal_run(void *t0ctx) { uint32_t *dp, *rp; const unsigned char *ip; #define T0_LOCAL(x) (*(rp - 2 - (x))) #define T0_POP() (*-- dp) #define T0_POPi() (*(int32_t *)(-- dp)) #define T0_PEEK(x) (*(dp - 1 - (x))) #define T0_PEEKi(x) (*(int32_t *)(dp - 1 - (x))) #define T0_PUSH(v) do { *dp = (v); dp ++; } while (0) #define T0_PUSHi(v) do { *(int32_t *)dp = (v); dp ++; } while (0) #define T0_RPOP() (*-- rp) #define T0_RPOPi() (*(int32_t *)(-- rp)) #define T0_RPUSH(v) do { *rp = (v); rp ++; } while (0) #define T0_RPUSHi(v) do { *(int32_t *)rp = (v); rp ++; } while (0) #define T0_ROLL(x) do { \ size_t t0len = (size_t)(x); \ uint32_t t0tmp = *(dp - 1 - t0len); \ memmove(dp - t0len - 1, dp - t0len, t0len * sizeof *dp); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_SWAP() do { \ uint32_t t0tmp = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_ROT() do { \ uint32_t t0tmp = *(dp - 3); \ *(dp - 3) = *(dp - 2); \ *(dp - 2) = *(dp - 1); \ *(dp - 1) = t0tmp; \ } while (0) #define T0_NROT() do { \ uint32_t t0tmp = *(dp - 1); \ *(dp - 1) = *(dp - 2); \ *(dp - 2) = *(dp - 3); \ *(dp - 3) = t0tmp; \ } while (0) #define T0_PICK(x) do { \ uint32_t t0depth = (x); \ T0_PUSH(T0_PEEK(t0depth)); \ } while (0) #define T0_CO() do { \ goto t0_exit; \ } while (0) #define T0_RET() goto t0_next dp = ((_src_x509_x509_minimal_ct0_context *)t0ctx)->dp; rp = ((_src_x509_x509_minimal_ct0_context *)t0ctx)->rp; ip = ((_src_x509_x509_minimal_ct0_context *)t0ctx)->ip; goto t0_next; for (;;) { uint32_t t0x; t0_next: t0x = T0_NEXT(&ip); if (t0x < _src_x509_x509_minimal_cT0_INTERPRETED) { switch (t0x) { int32_t t0off; case 0: /* ret */ t0x = T0_RPOP(); rp -= (t0x >> 16); t0x &= 0xFFFF; if (t0x == 0) { ip = NULL; goto t0_exit; } ip = &_src_x509_x509_minimal_ct0_codeblock[t0x]; break; case 1: /* literal constant */ T0_PUSHi(_src_x509_x509_minimal_ct0_parse7E_signed(&ip)); break; case 2: /* read local */ T0_PUSH(T0_LOCAL(_src_x509_x509_minimal_ct0_parse7E_unsigned(&ip))); break; case 3: /* write local */ T0_LOCAL(_src_x509_x509_minimal_ct0_parse7E_unsigned(&ip)) = T0_POP(); break; case 4: /* jump */ t0off = _src_x509_x509_minimal_ct0_parse7E_signed(&ip); ip += t0off; break; case 5: /* jump if */ t0off = _src_x509_x509_minimal_ct0_parse7E_signed(&ip); if (T0_POP()) { ip += t0off; } break; case 6: /* jump if not */ t0off = _src_x509_x509_minimal_ct0_parse7E_signed(&ip); if (!T0_POP()) { ip += t0off; } break; case 7: { /* %25 */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSHi(a % b); } break; case 8: { /* * */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a * b); } break; case 9: { /* + */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a + b); } break; case 10: { /* - */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a - b); } break; case 11: { /* -rot */ T0_NROT(); } break; case 12: { /* / */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSHi(a / b); } break; case 13: { /* < */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a < b)); } break; case 14: { /* << */ int c = (int)T0_POPi(); uint32_t x = T0_POP(); T0_PUSH(x << c); } break; case 15: { /* <= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a <= b)); } break; case 16: { /* <> */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a != b)); } break; case 17: { /* = */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(-(uint32_t)(a == b)); } break; case 18: { /* > */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a > b)); } break; case 19: { /* >= */ int32_t b = T0_POPi(); int32_t a = T0_POPi(); T0_PUSH(-(uint32_t)(a >= b)); } break; case 20: { /* >> */ int c = (int)T0_POPi(); int32_t x = T0_POPi(); T0_PUSHi(x >> c); } break; case 21: { /* and */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a & b); } break; case 22: { /* blobcopy */ size_t len = T0_POP(); unsigned char *src = (unsigned char *)_src_x509_x509_minimal_cCTX + T0_POP(); unsigned char *dst = (unsigned char *)_src_x509_x509_minimal_cCTX + T0_POP(); memcpy(dst, src, len); } break; case 23: { /* check-direct-trust */ size_t u; for (u = 0; u < _src_x509_x509_minimal_cCTX->trust_anchors_num; u ++) { const br_x509_trust_anchor *ta; unsigned char hashed_DN[64]; int kt; ta = &_src_x509_x509_minimal_cCTX->trust_anchors[u]; if (ta->flags & BR_X509_TA_CA) { continue; } hash_dn(_src_x509_x509_minimal_cCTX, ta->dn.data, ta->dn.len, hashed_DN); if (memcmp(hashed_DN, _src_x509_x509_minimal_cCTX->current_dn_hash, DNHASH_LEN)) { continue; } kt = _src_x509_x509_minimal_cCTX->pkey.key_type; if ((ta->pkey.key_type & 0x0F) != kt) { continue; } switch (kt) { case BR_KEYTYPE_RSA: if (!eqbigint(_src_x509_x509_minimal_cCTX->pkey.key.rsa.n, _src_x509_x509_minimal_cCTX->pkey.key.rsa.nlen, ta->pkey.key.rsa.n, ta->pkey.key.rsa.nlen) || !eqbigint(_src_x509_x509_minimal_cCTX->pkey.key.rsa.e, _src_x509_x509_minimal_cCTX->pkey.key.rsa.elen, ta->pkey.key.rsa.e, ta->pkey.key.rsa.elen)) { continue; } break; case BR_KEYTYPE_EC: if (_src_x509_x509_minimal_cCTX->pkey.key.ec.curve != ta->pkey.key.ec.curve || _src_x509_x509_minimal_cCTX->pkey.key.ec.qlen != ta->pkey.key.ec.qlen || memcmp(_src_x509_x509_minimal_cCTX->pkey.key.ec.q, ta->pkey.key.ec.q, ta->pkey.key.ec.qlen) != 0) { continue; } break; default: continue; } /* * Direct trust match! */ _src_x509_x509_minimal_cCTX->err = BR_ERR_X509_OK; T0_CO(); } } break; case 24: { /* check-trust-anchor-CA */ size_t u; for (u = 0; u < _src_x509_x509_minimal_cCTX->trust_anchors_num; u ++) { const br_x509_trust_anchor *ta; unsigned char hashed_DN[64]; ta = &_src_x509_x509_minimal_cCTX->trust_anchors[u]; if (!(ta->flags & BR_X509_TA_CA)) { continue; } hash_dn(_src_x509_x509_minimal_cCTX, ta->dn.data, ta->dn.len, hashed_DN); if (memcmp(hashed_DN, _src_x509_x509_minimal_cCTX->saved_dn_hash, DNHASH_LEN)) { continue; } if (verify_signature(_src_x509_x509_minimal_cCTX, &ta->pkey) == 0) { _src_x509_x509_minimal_cCTX->err = BR_ERR_X509_OK; T0_CO(); } } } break; case 25: { /* check-validity-range */ uint32_t nbs = T0_POP(); uint32_t nbd = T0_POP(); uint32_t nas = T0_POP(); uint32_t nad = T0_POP(); int r; if (_src_x509_x509_minimal_cCTX->itime != 0) { r = _src_x509_x509_minimal_cCTX->itime(_src_x509_x509_minimal_cCTX->itime_ctx, nbd, nbs, nad, nas); if (r < -1 || r > 1) { _src_x509_x509_minimal_cCTX->err = BR_ERR_X509_TIME_UNKNOWN; T0_CO(); } } else { uint32_t vd = _src_x509_x509_minimal_cCTX->days; uint32_t vs = _src_x509_x509_minimal_cCTX->seconds; if (vd == 0 && vs == 0) { #if BR_USE_UNIX_TIME time_t x = time(NULL); vd = (uint32_t)(x / 86400) + 719528; vs = (uint32_t)(x % 86400); #elif BR_USE_WIN32_TIME FILETIME ft; uint64_t x; GetSystemTimeAsFileTime(&ft); x = ((uint64_t)ft.dwHighDateTime << 32) + (uint64_t)ft.dwLowDateTime; x = (x / 10000000); vd = (uint32_t)(x / 86400) + 584754; vs = (uint32_t)(x % 86400); #else _src_x509_x509_minimal_cCTX->err = BR_ERR_X509_TIME_UNKNOWN; T0_CO(); #endif } if (vd < nbd || (vd == nbd && vs < nbs)) { r = -1; } else if (vd > nad || (vd == nad && vs > nas)) { r = 1; } else { r = 0; } } T0_PUSHi(r); } break; case 26: { /* co */ T0_CO(); } break; case 27: { /* compute-dn-hash */ _src_x509_x509_minimal_cCTX->dn_hash_impl->out(&_src_x509_x509_minimal_cCTX->dn_hash.vtable, _src_x509_x509_minimal_cCTX->current_dn_hash); _src_x509_x509_minimal_cCTX->do_dn_hash = 0; } break; case 28: { /* compute-tbs-hash */ int id = T0_POPi(); size_t len; len = br_multihash_out(&_src_x509_x509_minimal_cCTX->mhash, id, _src_x509_x509_minimal_cCTX->tbs_hash); T0_PUSH(len); } break; case 29: { /* copy-ee-ec-pkey */ size_t qlen = T0_POP(); uint32_t curve = T0_POP(); memcpy(_src_x509_x509_minimal_cCTX->ee_pkey_data, _src_x509_x509_minimal_cCTX->pkey_data, qlen); _src_x509_x509_minimal_cCTX->pkey.key_type = BR_KEYTYPE_EC; _src_x509_x509_minimal_cCTX->pkey.key.ec.curve = curve; _src_x509_x509_minimal_cCTX->pkey.key.ec.q = _src_x509_x509_minimal_cCTX->ee_pkey_data; _src_x509_x509_minimal_cCTX->pkey.key.ec.qlen = qlen; } break; case 30: { /* copy-ee-rsa-pkey */ size_t elen = T0_POP(); size_t nlen = T0_POP(); memcpy(_src_x509_x509_minimal_cCTX->ee_pkey_data, _src_x509_x509_minimal_cCTX->pkey_data, nlen + elen); _src_x509_x509_minimal_cCTX->pkey.key_type = BR_KEYTYPE_RSA; _src_x509_x509_minimal_cCTX->pkey.key.rsa.n = _src_x509_x509_minimal_cCTX->ee_pkey_data; _src_x509_x509_minimal_cCTX->pkey.key.rsa.nlen = nlen; _src_x509_x509_minimal_cCTX->pkey.key.rsa.e = _src_x509_x509_minimal_cCTX->ee_pkey_data + nlen; _src_x509_x509_minimal_cCTX->pkey.key.rsa.elen = elen; } break; case 31: { /* copy-name-SAN */ unsigned tag = T0_POP(); unsigned ok = T0_POP(); size_t u, len; len = _src_x509_x509_minimal_cCTX->pad[0]; for (u = 0; u < _src_x509_x509_minimal_cCTX->num_name_elts; u ++) { br_name_element *ne; ne = &_src_x509_x509_minimal_cCTX->name_elts[u]; if (ne->status == 0 && ne->oid[0] == 0 && ne->oid[1] == tag) { if (ok && ne->len > len) { memcpy(ne->buf, _src_x509_x509_minimal_cCTX->pad + 1, len); ne->buf[len] = 0; ne->status = 1; } else { ne->status = -1; } break; } } } break; case 32: { /* copy-name-element */ size_t len; int32_t off = T0_POPi(); int ok = T0_POPi(); if (off >= 0) { br_name_element *ne = &_src_x509_x509_minimal_cCTX->name_elts[off]; if (ok) { len = _src_x509_x509_minimal_cCTX->pad[0]; if (len < ne->len) { memcpy(ne->buf, _src_x509_x509_minimal_cCTX->pad + 1, len); ne->buf[len] = 0; ne->status = 1; } else { ne->status = -1; } } else { ne->status = -1; } } } break; case 33: { /* data-get8 */ size_t addr = T0_POP(); T0_PUSH(_src_x509_x509_minimal_ct0_datablock[addr]); } break; case 34: { /* dn-hash-length */ T0_PUSH(DNHASH_LEN); } break; case 35: { /* do-ecdsa-vrfy */ size_t qlen = T0_POP(); int curve = T0_POP(); br_x509_pkey pk; pk.key_type = BR_KEYTYPE_EC; pk.key.ec.curve = curve; pk.key.ec.q = _src_x509_x509_minimal_cCTX->pkey_data; pk.key.ec.qlen = qlen; T0_PUSH(verify_signature(_src_x509_x509_minimal_cCTX, &pk)); } break; case 36: { /* do-rsa-vrfy */ size_t elen = T0_POP(); size_t nlen = T0_POP(); br_x509_pkey pk; pk.key_type = BR_KEYTYPE_RSA; pk.key.rsa.n = _src_x509_x509_minimal_cCTX->pkey_data; pk.key.rsa.nlen = nlen; pk.key.rsa.e = _src_x509_x509_minimal_cCTX->pkey_data + nlen; pk.key.rsa.elen = elen; T0_PUSH(verify_signature(_src_x509_x509_minimal_cCTX, &pk)); } break; case 37: { /* drop */ (void)T0_POP(); } break; case 38: { /* dup */ T0_PUSH(T0_PEEK(0)); } break; case 39: { /* eqOID */ const unsigned char *a2 = &_src_x509_x509_minimal_ct0_datablock[T0_POP()]; const unsigned char *a1 = &_src_x509_x509_minimal_cCTX->pad[0]; size_t len = a1[0]; int x; if (len == a2[0]) { x = -(memcmp(a1 + 1, a2 + 1, len) == 0); } else { x = 0; } T0_PUSH((uint32_t)x); } break; case 40: { /* eqblob */ size_t len = T0_POP(); const unsigned char *a2 = (const unsigned char *)_src_x509_x509_minimal_cCTX + T0_POP(); const unsigned char *a1 = (const unsigned char *)_src_x509_x509_minimal_cCTX + T0_POP(); T0_PUSHi(-(memcmp(a1, a2, len) == 0)); } break; case 41: { /* fail */ _src_x509_x509_minimal_cCTX->err = T0_POPi(); T0_CO(); } break; case 42: { /* get16 */ uint32_t addr = T0_POP(); T0_PUSH(*(uint16_t *)(void *)((unsigned char *)_src_x509_x509_minimal_cCTX + addr)); } break; case 43: { /* get32 */ uint32_t addr = T0_POP(); T0_PUSH(*(uint32_t *)(void *)((unsigned char *)_src_x509_x509_minimal_cCTX + addr)); } break; case 44: { /* match-server-name */ size_t n1, n2; if (_src_x509_x509_minimal_cCTX->server_name == NULL) { T0_PUSH(0); T0_RET(); } n1 = strlen(_src_x509_x509_minimal_cCTX->server_name); n2 = _src_x509_x509_minimal_cCTX->pad[0]; if (n1 == n2 && eqnocase(&_src_x509_x509_minimal_cCTX->pad[1], _src_x509_x509_minimal_cCTX->server_name, n1)) { T0_PUSHi(-1); T0_RET(); } if (n2 >= 2 && _src_x509_x509_minimal_cCTX->pad[1] == '*' && _src_x509_x509_minimal_cCTX->pad[2] == '.') { size_t u; u = 0; while (u < n1 && _src_x509_x509_minimal_cCTX->server_name[u] != '.') { u ++; } u ++; n1 -= u; if ((n2 - 2) == n1 && eqnocase(&_src_x509_x509_minimal_cCTX->pad[3], _src_x509_x509_minimal_cCTX->server_name + u, n1)) { T0_PUSHi(-1); T0_RET(); } } T0_PUSH(0); } break; case 45: { /* neg */ uint32_t a = T0_POP(); T0_PUSH(-a); } break; case 46: { /* offset-name-element */ unsigned san = T0_POP(); size_t u; for (u = 0; u < _src_x509_x509_minimal_cCTX->num_name_elts; u ++) { if (_src_x509_x509_minimal_cCTX->name_elts[u].status == 0) { const unsigned char *oid; size_t len, off; oid = _src_x509_x509_minimal_cCTX->name_elts[u].oid; if (san) { if (oid[0] != 0 || oid[1] != 0) { continue; } off = 2; } else { off = 0; } len = oid[off]; if (len != 0 && len == _src_x509_x509_minimal_cCTX->pad[0] && memcmp(oid + off + 1, _src_x509_x509_minimal_cCTX->pad + 1, len) == 0) { T0_PUSH(u); T0_RET(); } } } T0_PUSHi(-1); } break; case 47: { /* or */ uint32_t b = T0_POP(); uint32_t a = T0_POP(); T0_PUSH(a | b); } break; case 48: { /* over */ T0_PUSH(T0_PEEK(1)); } break; case 49: { /* read-blob-inner */ uint32_t len = T0_POP(); uint32_t addr = T0_POP(); size_t clen = _src_x509_x509_minimal_cCTX->hlen; if (clen > len) { clen = (size_t)len; } if (addr != 0) { memcpy((unsigned char *)_src_x509_x509_minimal_cCTX + addr, _src_x509_x509_minimal_cCTX->hbuf, clen); } if (_src_x509_x509_minimal_cCTX->do_mhash) { br_multihash_update(&_src_x509_x509_minimal_cCTX->mhash, _src_x509_x509_minimal_cCTX->hbuf, clen); } if (_src_x509_x509_minimal_cCTX->do_dn_hash) { _src_x509_x509_minimal_cCTX->dn_hash_impl->update( &_src_x509_x509_minimal_cCTX->dn_hash.vtable, _src_x509_x509_minimal_cCTX->hbuf, clen); } _src_x509_x509_minimal_cCTX->hbuf += clen; _src_x509_x509_minimal_cCTX->hlen -= clen; T0_PUSH(addr + clen); T0_PUSH(len - clen); } break; case 50: { /* read8-low */ if (_src_x509_x509_minimal_cCTX->hlen == 0) { T0_PUSHi(-1); } else { unsigned char x = *_src_x509_x509_minimal_cCTX->hbuf ++; if (_src_x509_x509_minimal_cCTX->do_mhash) { br_multihash_update(&_src_x509_x509_minimal_cCTX->mhash, &x, 1); } if (_src_x509_x509_minimal_cCTX->do_dn_hash) { _src_x509_x509_minimal_cCTX->dn_hash_impl->update(&_src_x509_x509_minimal_cCTX->dn_hash.vtable, &x, 1); } _src_x509_x509_minimal_cCTX->hlen --; T0_PUSH(x); } } break; case 51: { /* rot */ T0_ROT(); } break; case 52: { /* set16 */ uint32_t addr = T0_POP(); *(uint16_t *)(void *)((unsigned char *)_src_x509_x509_minimal_cCTX + addr) = T0_POP(); } break; case 53: { /* set32 */ uint32_t addr = T0_POP(); *(uint32_t *)(void *)((unsigned char *)_src_x509_x509_minimal_cCTX + addr) = T0_POP(); } break; case 54: { /* set8 */ uint32_t addr = T0_POP(); *((unsigned char *)_src_x509_x509_minimal_cCTX + addr) = (unsigned char)T0_POP(); } break; case 55: { /* start-dn-hash */ _src_x509_x509_minimal_cCTX->dn_hash_impl->init(&_src_x509_x509_minimal_cCTX->dn_hash.vtable); _src_x509_x509_minimal_cCTX->do_dn_hash = 1; } break; case 56: { /* start-tbs-hash */ br_multihash_init(&_src_x509_x509_minimal_cCTX->mhash); _src_x509_x509_minimal_cCTX->do_mhash = 1; } break; case 57: { /* stop-tbs-hash */ _src_x509_x509_minimal_cCTX->do_mhash = 0; } break; case 58: { /* swap */ T0_SWAP(); } break; case 59: { /* zero-server-name */ T0_PUSHi(-(_src_x509_x509_minimal_cCTX->server_name == NULL)); } break; } } else { _src_x509_x509_minimal_cT0_ENTER(ip, rp, t0x); } } t0_exit: ((_src_x509_x509_minimal_ct0_context *)t0ctx)->dp = dp; ((_src_x509_x509_minimal_ct0_context *)t0ctx)->rp = rp; ((_src_x509_x509_minimal_ct0_context *)t0ctx)->ip = ip; } /* * Verify the signature on the certificate with the provided public key. * This function checks the public key type with regards to the expected * type. Returned value is either 0 on success, or a non-zero error code. */ static int verify_signature(br_x509_minimal_context *ctx, const br_x509_pkey *pk) { int kt; kt = ctx->cert_signer_key_type; if ((pk->key_type & 0x0F) != kt) { return BR_ERR_X509_WRONG_KEY_TYPE; } switch (kt) { unsigned char tmp[64]; case BR_KEYTYPE_RSA: if (ctx->irsa == 0) { return BR_ERR_X509_UNSUPPORTED; } if (!ctx->irsa(ctx->cert_sig, ctx->cert_sig_len, &_src_x509_x509_minimal_ct0_datablock[ctx->cert_sig_hash_oid], ctx->cert_sig_hash_len, &pk->key.rsa, tmp)) { return BR_ERR_X509_BAD_SIGNATURE; } if (memcmp(ctx->tbs_hash, tmp, ctx->cert_sig_hash_len) != 0) { return BR_ERR_X509_BAD_SIGNATURE; } return 0; case BR_KEYTYPE_EC: if (ctx->iecdsa == 0) { return BR_ERR_X509_UNSUPPORTED; } if (!ctx->iecdsa(ctx->iec, ctx->tbs_hash, ctx->cert_sig_hash_len, &pk->key.ec, ctx->cert_sig, ctx->cert_sig_len)) { return BR_ERR_X509_BAD_SIGNATURE; } return 0; default: return BR_ERR_X509_UNSUPPORTED; } } //silver_chain_scope_start //mannaged by silver chain //silver_chain_scope_end /* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* see bearssl_x509.h */ void br_x509_minimal_init_full(br_x509_minimal_context *xc, const br_x509_trust_anchor *trust_anchors, size_t trust_anchors_num) { /* * All hash functions are activated. * Note: the X.509 validation engine will nonetheless refuse to * validate signatures that use MD5 as hash function. */ static const br_hash_class *hashes[] = { &br_md5_vtable, &br_sha1_vtable, &br_sha224_vtable, &br_sha256_vtable, &br_sha384_vtable, &br_sha512_vtable }; int id; br_x509_minimal_init(xc, &br_sha256_vtable, trust_anchors, trust_anchors_num); br_x509_minimal_set_rsa(xc, &br_rsa_i31_pkcs1_vrfy); br_x509_minimal_set_ecdsa(xc, &br_ec_prime_i31, &br_ecdsa_i31_vrfy_asn1); for (id = br_md5_ID; id <= br_sha512_ID; id ++) { const br_hash_class *hc; hc = hashes[id - 1]; br_x509_minimal_set_hash(xc, id, hc); } } #endif #endif #if !defined(BEARSSL_HTTPS_MOCK_CJSON_DEFINE) && defined(BEARSSL_HTTPS_CJSON_DECLARATED) /* Copyright (c) 2009-2017 Dave Gamble and cJSON contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* cJSON */ /* JSON parser in C. */ /* disable warnings about old C89 functions in MSVC */ #if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER) #define _CRT_SECURE_NO_DEPRECATE #endif #ifdef __GNUC__ #pragma GCC visibility push(default) #endif #if defined(_MSC_VER) #pragma warning (push) /* disable warning about single line comments in system headers */ #pragma warning (disable : 4001) #endif #include #include #include #include #include #include #include #ifdef ENABLE_LOCALES #include #endif #if defined(_MSC_VER) #pragma warning (pop) #endif #ifdef __GNUC__ #pragma GCC visibility pop #endif /* define our own boolean type */ #ifdef true #undef true #endif #define true ((cJSON_bool)1) #ifdef false #undef false #endif #define false ((cJSON_bool)0) /* define isnan and isinf for ANSI C, if in C99 or above, isnan and isinf has been defined in math.h */ #ifndef isinf #define isinf(d) (isnan((d - d)) && !isnan(d)) #endif #ifndef isnan #define isnan(d) (d != d) #endif #ifndef NAN #ifdef _WIN32 #define NAN sqrt(-1.0) #else #define NAN 0.0/0.0 #endif #endif typedef struct { const unsigned char *json; size_t position; } error; static error global_error = { NULL, 0 }; CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void) { return (const char*) (global_error.json + global_error.position); } CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item) { if (!cJSON_IsString(item)) { return NULL; } return item->valuestring; } CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item) { if (!cJSON_IsNumber(item)) { return (double) NAN; } return item->valuedouble; } /* This is a safeguard to prevent copy-pasters from using incompatible C and header files */ #if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 18) #error cJSON.h and cJSON.c have different versions. Make sure that both have the same. #endif CJSON_PUBLIC(const char*) cJSON_Version(void) { static char version[15]; sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH); return version; } /* Case insensitive string comparison, doesn't consider two NULL pointers equal though */ static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2) { if ((string1 == NULL) || (string2 == NULL)) { return 1; } if (string1 == string2) { return 0; } for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++) { if (*string1 == '\0') { return 0; } } return tolower(*string1) - tolower(*string2); } typedef struct internal_hooks { void *(CJSON_CDECL *allocate)(size_t size); void (CJSON_CDECL *deallocate)(void *pointer); void *(CJSON_CDECL *reallocate)(void *pointer, size_t size); } internal_hooks; #if defined(_MSC_VER) /* work around MSVC error C2322: '...' address of dllimport '...' is not static */ static void * CJSON_CDECL internal_malloc(size_t size) { return malloc(size); } static void CJSON_CDECL internal_free(void *pointer) { free(pointer); } static void * CJSON_CDECL internal_realloc(void *pointer, size_t size) { return realloc(pointer, size); } #else #define internal_malloc malloc #define internal_free free #define internal_realloc realloc #endif /* strlen of character literals resolved at compile time */ #define static_strlen(string_literal) (sizeof(string_literal) - sizeof("")) static internal_hooks global_hooks = { internal_malloc, internal_free, internal_realloc }; static unsigned char* cJSON_strdup(const unsigned char* string, const internal_hooks * const hooks) { size_t length = 0; unsigned char *copy = NULL; if (string == NULL) { return NULL; } length = strlen((const char*)string) + sizeof(""); copy = (unsigned char*)hooks->allocate(length); if (copy == NULL) { return NULL; } memcpy(copy, string, length); return copy; } CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks) { if (hooks == NULL) { /* Reset hooks */ global_hooks.allocate = malloc; global_hooks.deallocate = free; global_hooks.reallocate = realloc; return; } global_hooks.allocate = malloc; if (hooks->malloc_fn != NULL) { global_hooks.allocate = hooks->malloc_fn; } global_hooks.deallocate = free; if (hooks->free_fn != NULL) { global_hooks.deallocate = hooks->free_fn; } /* use realloc only if both free and malloc are used */ global_hooks.reallocate = NULL; if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free)) { global_hooks.reallocate = realloc; } } /* Internal constructor. */ static cJSON *cJSON_New_Item(const internal_hooks * const hooks) { cJSON* node = (cJSON*)hooks->allocate(sizeof(cJSON)); if (node) { memset(node, '\0', sizeof(cJSON)); } return node; } /* Delete a cJSON structure. */ CJSON_PUBLIC(void) cJSON_Delete(cJSON *item) { cJSON *next = NULL; while (item != NULL) { next = item->next; if (!(item->type & cJSON_IsReference) && (item->child != NULL)) { cJSON_Delete(item->child); } if (!(item->type & cJSON_IsReference) && (item->valuestring != NULL)) { global_hooks.deallocate(item->valuestring); item->valuestring = NULL; } if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) { global_hooks.deallocate(item->string); item->string = NULL; } global_hooks.deallocate(item); item = next; } } /* get the decimal point character of the current locale */ static unsigned char get_decimal_point(void) { #ifdef ENABLE_LOCALES struct lconv *lconv = localeconv(); return (unsigned char) lconv->decimal_point[0]; #else return '.'; #endif } typedef struct { const unsigned char *content; size_t length; size_t offset; size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */ internal_hooks hooks; } parse_buffer; /* check if the given size is left to read in a given parse buffer (starting with 1) */ #define can_read(buffer, size) ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length)) /* check if the buffer can be accessed at the given index (starting with 0) */ #define can_access_at_index(buffer, index) ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length)) #define cannot_access_at_index(buffer, index) (!can_access_at_index(buffer, index)) /* get a pointer to the buffer at the position */ #define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset) /* Parse the input text to generate a number, and populate the result into item. */ static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer) { double number = 0; unsigned char *after_end = NULL; unsigned char number_c_string[64]; unsigned char decimal_point = get_decimal_point(); size_t i = 0; if ((input_buffer == NULL) || (input_buffer->content == NULL)) { return false; } /* copy the number into a temporary buffer and replace '.' with the decimal point * of the current locale (for strtod) * This also takes care of '\0' not necessarily being available for marking the end of the input */ for (i = 0; (i < (sizeof(number_c_string) - 1)) && can_access_at_index(input_buffer, i); i++) { switch (buffer_at_offset(input_buffer)[i]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '+': case '-': case 'e': case 'E': number_c_string[i] = buffer_at_offset(input_buffer)[i]; break; case '.': number_c_string[i] = decimal_point; break; default: goto loop_end; } } loop_end: number_c_string[i] = '\0'; number = strtod((const char*)number_c_string, (char**)&after_end); if (number_c_string == after_end) { return false; /* parse_error */ } item->valuedouble = number; /* use saturation in case of overflow */ if (number >= INT_MAX) { item->valueint = INT_MAX; } else if (number <= (double)INT_MIN) { item->valueint = INT_MIN; } else { item->valueint = (int)number; } item->type = cJSON_Number; input_buffer->offset += (size_t)(after_end - number_c_string); return true; } /* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */ CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number) { if (number >= INT_MAX) { object->valueint = INT_MAX; } else if (number <= (double)INT_MIN) { object->valueint = INT_MIN; } else { object->valueint = (int)number; } return object->valuedouble = number; } /* Note: when passing a NULL valuestring, cJSON_SetValuestring treats this as an error and return NULL */ CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring) { char *copy = NULL; /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */ if ((object == NULL) || !(object->type & cJSON_String) || (object->type & cJSON_IsReference)) { return NULL; } /* return NULL if the object is corrupted or valuestring is NULL */ if (object->valuestring == NULL || valuestring == NULL) { return NULL; } if (strlen(valuestring) <= strlen(object->valuestring)) { strcpy(object->valuestring, valuestring); return object->valuestring; } copy = (char*) cJSON_strdup((const unsigned char*)valuestring, &global_hooks); if (copy == NULL) { return NULL; } if (object->valuestring != NULL) { cJSON_free(object->valuestring); } object->valuestring = copy; return copy; } typedef struct { unsigned char *buffer; size_t length; size_t offset; size_t depth; /* current nesting depth (for formatted printing) */ cJSON_bool noalloc; cJSON_bool format; /* is this print a formatted print */ internal_hooks hooks; } printbuffer; /* realloc printbuffer if necessary to have at least "needed" bytes more */ static unsigned char* ensure(printbuffer * const p, size_t needed) { unsigned char *newbuffer = NULL; size_t newsize = 0; if ((p == NULL) || (p->buffer == NULL)) { return NULL; } if ((p->length > 0) && (p->offset >= p->length)) { /* make sure that offset is valid */ return NULL; } if (needed > INT_MAX) { /* sizes bigger than INT_MAX are currently not supported */ return NULL; } needed += p->offset + 1; if (needed <= p->length) { return p->buffer + p->offset; } if (p->noalloc) { return NULL; } /* calculate new buffer size */ if (needed > (INT_MAX / 2)) { /* overflow of int, use INT_MAX if possible */ if (needed <= INT_MAX) { newsize = INT_MAX; } else { return NULL; } } else { newsize = needed * 2; } if (p->hooks.reallocate != NULL) { /* reallocate with realloc if available */ newbuffer = (unsigned char*)p->hooks.reallocate(p->buffer, newsize); if (newbuffer == NULL) { p->hooks.deallocate(p->buffer); p->length = 0; p->buffer = NULL; return NULL; } } else { /* otherwise reallocate manually */ newbuffer = (unsigned char*)p->hooks.allocate(newsize); if (!newbuffer) { p->hooks.deallocate(p->buffer); p->length = 0; p->buffer = NULL; return NULL; } memcpy(newbuffer, p->buffer, p->offset + 1); p->hooks.deallocate(p->buffer); } p->length = newsize; p->buffer = newbuffer; return newbuffer + p->offset; } /* calculate the new length of the string in a printbuffer and update the offset */ static void update_offset(printbuffer * const buffer) { const unsigned char *buffer_pointer = NULL; if ((buffer == NULL) || (buffer->buffer == NULL)) { return; } buffer_pointer = buffer->buffer + buffer->offset; buffer->offset += strlen((const char*)buffer_pointer); } /* securely comparison of floating-point variables */ static cJSON_bool compare_double(double a, double b) { double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b); return (fabs(a - b) <= maxVal * DBL_EPSILON); } /* Render the number nicely from the given item into a string. */ static cJSON_bool print_number(const cJSON * const item, printbuffer * const output_buffer) { unsigned char *output_pointer = NULL; double d = item->valuedouble; int length = 0; size_t i = 0; unsigned char number_buffer[26] = {0}; /* temporary buffer to print the number into */ unsigned char decimal_point = get_decimal_point(); double test = 0.0; if (output_buffer == NULL) { return false; } /* This checks for NaN and Infinity */ if (isnan(d) || isinf(d)) { length = sprintf((char*)number_buffer, "null"); } else if(d == (double)item->valueint) { length = sprintf((char*)number_buffer, "%d", item->valueint); } else { /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */ length = sprintf((char*)number_buffer, "%1.15g", d); /* Check whether the original double can be recovered */ if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || !compare_double((double)test, d)) { /* If not, print with 17 decimal places of precision */ length = sprintf((char*)number_buffer, "%1.17g", d); } } /* sprintf failed or buffer overrun occurred */ if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1))) { return false; } /* reserve appropriate space in the output */ output_pointer = ensure(output_buffer, (size_t)length + sizeof("")); if (output_pointer == NULL) { return false; } /* copy the printed number to the output and replace locale * dependent decimal point with '.' */ for (i = 0; i < ((size_t)length); i++) { if (number_buffer[i] == decimal_point) { output_pointer[i] = '.'; continue; } output_pointer[i] = number_buffer[i]; } output_pointer[i] = '\0'; output_buffer->offset += (size_t)length; return true; } /* parse 4 digit hexadecimal number */ static unsigned parse_hex4(const unsigned char * const input) { unsigned int h = 0; size_t i = 0; for (i = 0; i < 4; i++) { /* parse digit */ if ((input[i] >= '0') && (input[i] <= '9')) { h += (unsigned int) input[i] - '0'; } else if ((input[i] >= 'A') && (input[i] <= 'F')) { h += (unsigned int) 10 + input[i] - 'A'; } else if ((input[i] >= 'a') && (input[i] <= 'f')) { h += (unsigned int) 10 + input[i] - 'a'; } else /* invalid */ { return 0; } if (i < 3) { /* shift left to make place for the next nibble */ h = h << 4; } } return h; } /* converts a UTF-16 literal to UTF-8 * A literal can be one or two sequences of the form \uXXXX */ static unsigned char utf16_literal_to_utf8(const unsigned char * const input_pointer, const unsigned char * const input_end, unsigned char **output_pointer) { long unsigned int codepoint = 0; unsigned int first_code = 0; const unsigned char *first_sequence = input_pointer; unsigned char utf8_length = 0; unsigned char utf8_position = 0; unsigned char sequence_length = 0; unsigned char first_byte_mark = 0; if ((input_end - first_sequence) < 6) { /* input ends unexpectedly */ goto fail; } /* get the first utf16 sequence */ first_code = parse_hex4(first_sequence + 2); /* check that the code is valid */ if (((first_code >= 0xDC00) && (first_code <= 0xDFFF))) { goto fail; } /* UTF16 surrogate pair */ if ((first_code >= 0xD800) && (first_code <= 0xDBFF)) { const unsigned char *second_sequence = first_sequence + 6; unsigned int second_code = 0; sequence_length = 12; /* \uXXXX\uXXXX */ if ((input_end - second_sequence) < 6) { /* input ends unexpectedly */ goto fail; } if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u')) { /* missing second half of the surrogate pair */ goto fail; } /* get the second utf16 sequence */ second_code = parse_hex4(second_sequence + 2); /* check that the code is valid */ if ((second_code < 0xDC00) || (second_code > 0xDFFF)) { /* invalid second half of the surrogate pair */ goto fail; } /* calculate the unicode codepoint from the surrogate pair */ codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF)); } else { sequence_length = 6; /* \uXXXX */ codepoint = first_code; } /* encode as UTF-8 * takes at maximum 4 bytes to encode: * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ if (codepoint < 0x80) { /* normal ascii, encoding 0xxxxxxx */ utf8_length = 1; } else if (codepoint < 0x800) { /* two bytes, encoding 110xxxxx 10xxxxxx */ utf8_length = 2; first_byte_mark = 0xC0; /* 11000000 */ } else if (codepoint < 0x10000) { /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */ utf8_length = 3; first_byte_mark = 0xE0; /* 11100000 */ } else if (codepoint <= 0x10FFFF) { /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */ utf8_length = 4; first_byte_mark = 0xF0; /* 11110000 */ } else { /* invalid unicode codepoint */ goto fail; } /* encode as utf8 */ for (utf8_position = (unsigned char)(utf8_length - 1); utf8_position > 0; utf8_position--) { /* 10xxxxxx */ (*output_pointer)[utf8_position] = (unsigned char)((codepoint | 0x80) & 0xBF); codepoint >>= 6; } /* encode first byte */ if (utf8_length > 1) { (*output_pointer)[0] = (unsigned char)((codepoint | first_byte_mark) & 0xFF); } else { (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F); } *output_pointer += utf8_length; return sequence_length; fail: return 0; } /* Parse the input text into an unescaped cinput, and populate item. */ static cJSON_bool parse_string(cJSON * const item, parse_buffer * const input_buffer) { const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1; const unsigned char *input_end = buffer_at_offset(input_buffer) + 1; unsigned char *output_pointer = NULL; unsigned char *output = NULL; /* not a string */ if (buffer_at_offset(input_buffer)[0] != '\"') { goto fail; } { /* calculate approximate size of the output (overestimate) */ size_t allocation_length = 0; size_t skipped_bytes = 0; while (((size_t)(input_end - input_buffer->content) < input_buffer->length) && (*input_end != '\"')) { /* is escape sequence */ if (input_end[0] == '\\') { if ((size_t)(input_end + 1 - input_buffer->content) >= input_buffer->length) { /* prevent buffer overflow when last input character is a backslash */ goto fail; } skipped_bytes++; input_end++; } input_end++; } if (((size_t)(input_end - input_buffer->content) >= input_buffer->length) || (*input_end != '\"')) { goto fail; /* string ended unexpectedly */ } /* This is at most how much we need for the output */ allocation_length = (size_t) (input_end - buffer_at_offset(input_buffer)) - skipped_bytes; output = (unsigned char*)input_buffer->hooks.allocate(allocation_length + sizeof("")); if (output == NULL) { goto fail; /* allocation failure */ } } output_pointer = output; /* loop through the string literal */ while (input_pointer < input_end) { if (*input_pointer != '\\') { *output_pointer++ = *input_pointer++; } /* escape sequence */ else { unsigned char sequence_length = 2; if ((input_end - input_pointer) < 1) { goto fail; } switch (input_pointer[1]) { case 'b': *output_pointer++ = '\b'; break; case 'f': *output_pointer++ = '\f'; break; case 'n': *output_pointer++ = '\n'; break; case 'r': *output_pointer++ = '\r'; break; case 't': *output_pointer++ = '\t'; break; case '\"': case '\\': case '/': *output_pointer++ = input_pointer[1]; break; /* UTF-16 literal */ case 'u': sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer); if (sequence_length == 0) { /* failed to convert UTF16-literal to UTF-8 */ goto fail; } break; default: goto fail; } input_pointer += sequence_length; } } /* zero terminate the output */ *output_pointer = '\0'; item->type = cJSON_String; item->valuestring = (char*)output; input_buffer->offset = (size_t) (input_end - input_buffer->content); input_buffer->offset++; return true; fail: if (output != NULL) { input_buffer->hooks.deallocate(output); output = NULL; } if (input_pointer != NULL) { input_buffer->offset = (size_t)(input_pointer - input_buffer->content); } return false; } /* Render the cstring provided to an escaped version that can be printed. */ static cJSON_bool print_string_ptr(const unsigned char * const input, printbuffer * const output_buffer) { const unsigned char *input_pointer = NULL; unsigned char *output = NULL; unsigned char *output_pointer = NULL; size_t output_length = 0; /* numbers of additional characters needed for escaping */ size_t escape_characters = 0; if (output_buffer == NULL) { return false; } /* empty string */ if (input == NULL) { output = ensure(output_buffer, sizeof("\"\"")); if (output == NULL) { return false; } strcpy((char*)output, "\"\""); return true; } /* set "flag" to 1 if something needs to be escaped */ for (input_pointer = input; *input_pointer; input_pointer++) { switch (*input_pointer) { case '\"': case '\\': case '\b': case '\f': case '\n': case '\r': case '\t': /* one character escape sequence */ escape_characters++; break; default: if (*input_pointer < 32) { /* UTF-16 escape sequence uXXXX */ escape_characters += 5; } break; } } output_length = (size_t)(input_pointer - input) + escape_characters; output = ensure(output_buffer, output_length + sizeof("\"\"")); if (output == NULL) { return false; } /* no characters have to be escaped */ if (escape_characters == 0) { output[0] = '\"'; memcpy(output + 1, input, output_length); output[output_length + 1] = '\"'; output[output_length + 2] = '\0'; return true; } output[0] = '\"'; output_pointer = output + 1; /* copy the string */ for (input_pointer = input; *input_pointer != '\0'; (void)input_pointer++, output_pointer++) { if ((*input_pointer > 31) && (*input_pointer != '\"') && (*input_pointer != '\\')) { /* normal character, copy */ *output_pointer = *input_pointer; } else { /* character needs to be escaped */ *output_pointer++ = '\\'; switch (*input_pointer) { case '\\': *output_pointer = '\\'; break; case '\"': *output_pointer = '\"'; break; case '\b': *output_pointer = 'b'; break; case '\f': *output_pointer = 'f'; break; case '\n': *output_pointer = 'n'; break; case '\r': *output_pointer = 'r'; break; case '\t': *output_pointer = 't'; break; default: /* escape and print as unicode codepoint */ sprintf((char*)output_pointer, "u%04x", *input_pointer); output_pointer += 4; break; } } } output[output_length + 1] = '\"'; output[output_length + 2] = '\0'; return true; } /* Invoke print_string_ptr (which is useful) on an item. */ static cJSON_bool print_string(const cJSON * const item, printbuffer * const p) { return print_string_ptr((unsigned char*)item->valuestring, p); } /* Predeclare these prototypes. */ static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer); static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer); static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer); static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer); static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer); static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer); /* Utility to jump whitespace and cr/lf */ static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer) { if ((buffer == NULL) || (buffer->content == NULL)) { return NULL; } if (cannot_access_at_index(buffer, 0)) { return buffer; } while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32)) { buffer->offset++; } if (buffer->offset == buffer->length) { buffer->offset--; } return buffer; } /* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */ static parse_buffer *skip_utf8_bom(parse_buffer * const buffer) { if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0)) { return NULL; } if (can_access_at_index(buffer, 4) && (strncmp((const char*)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0)) { buffer->offset += 3; } return buffer; } CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated) { size_t buffer_length; if (NULL == value) { return NULL; } /* Adding null character size due to require_null_terminated. */ buffer_length = strlen(value) + sizeof(""); return cJSON_ParseWithLengthOpts(value, buffer_length, return_parse_end, require_null_terminated); } /* Parse an object - create a new root, and populate. */ CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated) { parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } }; cJSON *item = NULL; /* reset error position */ global_error.json = NULL; global_error.position = 0; if (value == NULL || 0 == buffer_length) { goto fail; } buffer.content = (const unsigned char*)value; buffer.length = buffer_length; buffer.offset = 0; buffer.hooks = global_hooks; item = cJSON_New_Item(&global_hooks); if (item == NULL) /* memory fail */ { goto fail; } if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer)))) { /* parse failure. ep is set. */ goto fail; } /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */ if (require_null_terminated) { buffer_skip_whitespace(&buffer); if ((buffer.offset >= buffer.length) || buffer_at_offset(&buffer)[0] != '\0') { goto fail; } } if (return_parse_end) { *return_parse_end = (const char*)buffer_at_offset(&buffer); } return item; fail: if (item != NULL) { cJSON_Delete(item); } if (value != NULL) { error local_error; local_error.json = (const unsigned char*)value; local_error.position = 0; if (buffer.offset < buffer.length) { local_error.position = buffer.offset; } else if (buffer.length > 0) { local_error.position = buffer.length - 1; } if (return_parse_end != NULL) { *return_parse_end = (const char*)local_error.json + local_error.position; } global_error = local_error; } return NULL; } /* Default options for cJSON_Parse */ CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value) { return cJSON_ParseWithOpts(value, 0, 0); } CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length) { return cJSON_ParseWithLengthOpts(value, buffer_length, 0, 0); } #define cjson_min(a, b) (((a) < (b)) ? (a) : (b)) static unsigned char *print(const cJSON * const item, cJSON_bool format, const internal_hooks * const hooks) { static const size_t default_buffer_size = 256; printbuffer buffer[1]; unsigned char *printed = NULL; memset(buffer, 0, sizeof(buffer)); /* create buffer */ buffer->buffer = (unsigned char*) hooks->allocate(default_buffer_size); buffer->length = default_buffer_size; buffer->format = format; buffer->hooks = *hooks; if (buffer->buffer == NULL) { goto fail; } /* print the value */ if (!print_value(item, buffer)) { goto fail; } update_offset(buffer); /* check if reallocate is available */ if (hooks->reallocate != NULL) { printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1); if (printed == NULL) { goto fail; } buffer->buffer = NULL; } else /* otherwise copy the JSON over to a new buffer */ { printed = (unsigned char*) hooks->allocate(buffer->offset + 1); if (printed == NULL) { goto fail; } memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1)); printed[buffer->offset] = '\0'; /* just to be sure */ /* free the buffer */ hooks->deallocate(buffer->buffer); buffer->buffer = NULL; } return printed; fail: if (buffer->buffer != NULL) { hooks->deallocate(buffer->buffer); buffer->buffer = NULL; } if (printed != NULL) { hooks->deallocate(printed); printed = NULL; } return NULL; } /* Render a cJSON item/entity/structure to text. */ CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item) { return (char*)print(item, true, &global_hooks); } CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item) { return (char*)print(item, false, &global_hooks); } CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt) { printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } }; if (prebuffer < 0) { return NULL; } p.buffer = (unsigned char*)global_hooks.allocate((size_t)prebuffer); if (!p.buffer) { return NULL; } p.length = (size_t)prebuffer; p.offset = 0; p.noalloc = false; p.format = fmt; p.hooks = global_hooks; if (!print_value(item, &p)) { global_hooks.deallocate(p.buffer); p.buffer = NULL; return NULL; } return (char*)p.buffer; } CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format) { printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } }; if ((length < 0) || (buffer == NULL)) { return false; } p.buffer = (unsigned char*)buffer; p.length = (size_t)length; p.offset = 0; p.noalloc = true; p.format = format; p.hooks = global_hooks; return print_value(item, &p); } /* Parser core - when encountering text, process appropriately. */ static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer) { if ((input_buffer == NULL) || (input_buffer->content == NULL)) { return false; /* no input */ } /* parse the different types of values */ /* null */ if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0)) { item->type = cJSON_NULL; input_buffer->offset += 4; return true; } /* false */ if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0)) { item->type = cJSON_False; input_buffer->offset += 5; return true; } /* true */ if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "true", 4) == 0)) { item->type = cJSON_True; item->valueint = 1; input_buffer->offset += 4; return true; } /* string */ if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"')) { return parse_string(item, input_buffer); } /* number */ if (can_access_at_index(input_buffer, 0) && ((buffer_at_offset(input_buffer)[0] == '-') || ((buffer_at_offset(input_buffer)[0] >= '0') && (buffer_at_offset(input_buffer)[0] <= '9')))) { return parse_number(item, input_buffer); } /* array */ if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '[')) { return parse_array(item, input_buffer); } /* object */ if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{')) { return parse_object(item, input_buffer); } return false; } /* Render a value to text. */ static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer) { unsigned char *output = NULL; if ((item == NULL) || (output_buffer == NULL)) { return false; } switch ((item->type) & 0xFF) { case cJSON_NULL: output = ensure(output_buffer, 5); if (output == NULL) { return false; } strcpy((char*)output, "null"); return true; case cJSON_False: output = ensure(output_buffer, 6); if (output == NULL) { return false; } strcpy((char*)output, "false"); return true; case cJSON_True: output = ensure(output_buffer, 5); if (output == NULL) { return false; } strcpy((char*)output, "true"); return true; case cJSON_Number: return print_number(item, output_buffer); case cJSON_Raw: { size_t raw_length = 0; if (item->valuestring == NULL) { return false; } raw_length = strlen(item->valuestring) + sizeof(""); output = ensure(output_buffer, raw_length); if (output == NULL) { return false; } memcpy(output, item->valuestring, raw_length); return true; } case cJSON_String: return print_string(item, output_buffer); case cJSON_Array: return print_array(item, output_buffer); case cJSON_Object: return print_object(item, output_buffer); default: return false; } } /* Build an array from input text. */ static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer) { cJSON *head = NULL; /* head of the linked list */ cJSON *current_item = NULL; if (input_buffer->depth >= CJSON_NESTING_LIMIT) { return false; /* to deeply nested */ } input_buffer->depth++; if (buffer_at_offset(input_buffer)[0] != '[') { /* not an array */ goto fail; } input_buffer->offset++; buffer_skip_whitespace(input_buffer); if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ']')) { /* empty array */ goto success; } /* check if we skipped to the end of the buffer */ if (cannot_access_at_index(input_buffer, 0)) { input_buffer->offset--; goto fail; } /* step back to character in front of the first element */ input_buffer->offset--; /* loop through the comma separated array elements */ do { /* allocate next item */ cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks)); if (new_item == NULL) { goto fail; /* allocation failure */ } /* attach next item to list */ if (head == NULL) { /* start the linked list */ current_item = head = new_item; } else { /* add to the end and advance */ current_item->next = new_item; new_item->prev = current_item; current_item = new_item; } /* parse next value */ input_buffer->offset++; buffer_skip_whitespace(input_buffer); if (!parse_value(current_item, input_buffer)) { goto fail; /* failed to parse value */ } buffer_skip_whitespace(input_buffer); } while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ',')); if (cannot_access_at_index(input_buffer, 0) || buffer_at_offset(input_buffer)[0] != ']') { goto fail; /* expected end of array */ } success: input_buffer->depth--; if (head != NULL) { head->prev = current_item; } item->type = cJSON_Array; item->child = head; input_buffer->offset++; return true; fail: if (head != NULL) { cJSON_Delete(head); } return false; } /* Render an array to text */ static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer) { unsigned char *output_pointer = NULL; size_t length = 0; cJSON *current_element = item->child; if (output_buffer == NULL) { return false; } /* Compose the output array. */ /* opening square bracket */ output_pointer = ensure(output_buffer, 1); if (output_pointer == NULL) { return false; } *output_pointer = '['; output_buffer->offset++; output_buffer->depth++; while (current_element != NULL) { if (!print_value(current_element, output_buffer)) { return false; } update_offset(output_buffer); if (current_element->next) { length = (size_t) (output_buffer->format ? 2 : 1); output_pointer = ensure(output_buffer, length + 1); if (output_pointer == NULL) { return false; } *output_pointer++ = ','; if(output_buffer->format) { *output_pointer++ = ' '; } *output_pointer = '\0'; output_buffer->offset += length; } current_element = current_element->next; } output_pointer = ensure(output_buffer, 2); if (output_pointer == NULL) { return false; } *output_pointer++ = ']'; *output_pointer = '\0'; output_buffer->depth--; return true; } /* Build an object from the text. */ static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer) { cJSON *head = NULL; /* linked list head */ cJSON *current_item = NULL; if (input_buffer->depth >= CJSON_NESTING_LIMIT) { return false; /* to deeply nested */ } input_buffer->depth++; if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '{')) { goto fail; /* not an object */ } input_buffer->offset++; buffer_skip_whitespace(input_buffer); if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '}')) { goto success; /* empty object */ } /* check if we skipped to the end of the buffer */ if (cannot_access_at_index(input_buffer, 0)) { input_buffer->offset--; goto fail; } /* step back to character in front of the first element */ input_buffer->offset--; /* loop through the comma separated array elements */ do { /* allocate next item */ cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks)); if (new_item == NULL) { goto fail; /* allocation failure */ } /* attach next item to list */ if (head == NULL) { /* start the linked list */ current_item = head = new_item; } else { /* add to the end and advance */ current_item->next = new_item; new_item->prev = current_item; current_item = new_item; } if (cannot_access_at_index(input_buffer, 1)) { goto fail; /* nothing comes after the comma */ } /* parse the name of the child */ input_buffer->offset++; buffer_skip_whitespace(input_buffer); if (!parse_string(current_item, input_buffer)) { goto fail; /* failed to parse name */ } buffer_skip_whitespace(input_buffer); /* swap valuestring and string, because we parsed the name */ current_item->string = current_item->valuestring; current_item->valuestring = NULL; if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != ':')) { goto fail; /* invalid object */ } /* parse the value */ input_buffer->offset++; buffer_skip_whitespace(input_buffer); if (!parse_value(current_item, input_buffer)) { goto fail; /* failed to parse value */ } buffer_skip_whitespace(input_buffer); } while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ',')); if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '}')) { goto fail; /* expected end of object */ } success: input_buffer->depth--; if (head != NULL) { head->prev = current_item; } item->type = cJSON_Object; item->child = head; input_buffer->offset++; return true; fail: if (head != NULL) { cJSON_Delete(head); } return false; } /* Render an object to text. */ static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer) { unsigned char *output_pointer = NULL; size_t length = 0; cJSON *current_item = item->child; if (output_buffer == NULL) { return false; } /* Compose the output: */ length = (size_t) (output_buffer->format ? 2 : 1); /* fmt: {\n */ output_pointer = ensure(output_buffer, length + 1); if (output_pointer == NULL) { return false; } *output_pointer++ = '{'; output_buffer->depth++; if (output_buffer->format) { *output_pointer++ = '\n'; } output_buffer->offset += length; while (current_item) { if (output_buffer->format) { size_t i; output_pointer = ensure(output_buffer, output_buffer->depth); if (output_pointer == NULL) { return false; } for (i = 0; i < output_buffer->depth; i++) { *output_pointer++ = '\t'; } output_buffer->offset += output_buffer->depth; } /* print key */ if (!print_string_ptr((unsigned char*)current_item->string, output_buffer)) { return false; } update_offset(output_buffer); length = (size_t) (output_buffer->format ? 2 : 1); output_pointer = ensure(output_buffer, length); if (output_pointer == NULL) { return false; } *output_pointer++ = ':'; if (output_buffer->format) { *output_pointer++ = '\t'; } output_buffer->offset += length; /* print value */ if (!print_value(current_item, output_buffer)) { return false; } update_offset(output_buffer); /* print comma if not last */ length = ((size_t)(output_buffer->format ? 1 : 0) + (size_t)(current_item->next ? 1 : 0)); output_pointer = ensure(output_buffer, length + 1); if (output_pointer == NULL) { return false; } if (current_item->next) { *output_pointer++ = ','; } if (output_buffer->format) { *output_pointer++ = '\n'; } *output_pointer = '\0'; output_buffer->offset += length; current_item = current_item->next; } output_pointer = ensure(output_buffer, output_buffer->format ? (output_buffer->depth + 1) : 2); if (output_pointer == NULL) { return false; } if (output_buffer->format) { size_t i; for (i = 0; i < (output_buffer->depth - 1); i++) { *output_pointer++ = '\t'; } } *output_pointer++ = '}'; *output_pointer = '\0'; output_buffer->depth--; return true; } /* Get Array size/item / object item. */ CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array) { cJSON *child = NULL; size_t size = 0; if (array == NULL) { return 0; } child = array->child; while(child != NULL) { size++; child = child->next; } /* FIXME: Can overflow here. Cannot be fixed without breaking the API */ return (int)size; } static cJSON* get_array_item(const cJSON *array, size_t index) { cJSON *current_child = NULL; if (array == NULL) { return NULL; } current_child = array->child; while ((current_child != NULL) && (index > 0)) { index--; current_child = current_child->next; } return current_child; } CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index) { if (index < 0) { return NULL; } return get_array_item(array, (size_t)index); } static cJSON *get_object_item(const cJSON * const object, const char * const name, const cJSON_bool case_sensitive) { cJSON *current_element = NULL; if ((object == NULL) || (name == NULL)) { return NULL; } current_element = object->child; if (case_sensitive) { while ((current_element != NULL) && (current_element->string != NULL) && (strcmp(name, current_element->string) != 0)) { current_element = current_element->next; } } else { while ((current_element != NULL) && (case_insensitive_strcmp((const unsigned char*)name, (const unsigned char*)(current_element->string)) != 0)) { current_element = current_element->next; } } if ((current_element == NULL) || (current_element->string == NULL)) { return NULL; } return current_element; } CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string) { return get_object_item(object, string, false); } CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string) { return get_object_item(object, string, true); } CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string) { return cJSON_GetObjectItem(object, string) ? 1 : 0; } /* Utility for array list handling. */ static void suffix_object(cJSON *prev, cJSON *item) { prev->next = item; item->prev = prev; } /* Utility for handling references. */ static cJSON *create_reference(const cJSON *item, const internal_hooks * const hooks) { cJSON *reference = NULL; if (item == NULL) { return NULL; } reference = cJSON_New_Item(hooks); if (reference == NULL) { return NULL; } memcpy(reference, item, sizeof(cJSON)); reference->string = NULL; reference->type |= cJSON_IsReference; reference->next = reference->prev = NULL; return reference; } static cJSON_bool add_item_to_array(cJSON *array, cJSON *item) { cJSON *child = NULL; if ((item == NULL) || (array == NULL) || (array == item)) { return false; } child = array->child; /* * To find the last item in array quickly, we use prev in array */ if (child == NULL) { /* list is empty, start new one */ array->child = item; item->prev = item; item->next = NULL; } else { /* append to the end */ if (child->prev) { suffix_object(child->prev, item); array->child->prev = item; } } return true; } /* Add item to array/object. */ CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item) { return add_item_to_array(array, item); } #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5)))) #pragma GCC diagnostic push #endif #ifdef __GNUC__ #pragma GCC diagnostic ignored "-Wcast-qual" #endif /* helper function to cast away const */ static void* cast_away_const(const void* string) { return (void*)string; } #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5)))) #pragma GCC diagnostic pop #endif static cJSON_bool add_item_to_object(cJSON * const object, const char * const string, cJSON * const item, const internal_hooks * const hooks, const cJSON_bool constant_key) { char *new_key = NULL; int new_type = cJSON_Invalid; if ((object == NULL) || (string == NULL) || (item == NULL) || (object == item)) { return false; } if (constant_key) { new_key = (char*)cast_away_const(string); new_type = item->type | cJSON_StringIsConst; } else { new_key = (char*)cJSON_strdup((const unsigned char*)string, hooks); if (new_key == NULL) { return false; } new_type = item->type & ~cJSON_StringIsConst; } if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) { hooks->deallocate(item->string); } item->string = new_key; item->type = new_type; return add_item_to_array(object, item); } CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item) { return add_item_to_object(object, string, item, &global_hooks, false); } /* Add an item to an object with constant string as key */ CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item) { return add_item_to_object(object, string, item, &global_hooks, true); } CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) { if (array == NULL) { return false; } return add_item_to_array(array, create_reference(item, &global_hooks)); } CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item) { if ((object == NULL) || (string == NULL)) { return false; } return add_item_to_object(object, string, create_reference(item, &global_hooks), &global_hooks, false); } CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name) { cJSON *null = cJSON_CreateNull(); if (add_item_to_object(object, name, null, &global_hooks, false)) { return null; } cJSON_Delete(null); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name) { cJSON *true_item = cJSON_CreateTrue(); if (add_item_to_object(object, name, true_item, &global_hooks, false)) { return true_item; } cJSON_Delete(true_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name) { cJSON *false_item = cJSON_CreateFalse(); if (add_item_to_object(object, name, false_item, &global_hooks, false)) { return false_item; } cJSON_Delete(false_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean) { cJSON *bool_item = cJSON_CreateBool(boolean); if (add_item_to_object(object, name, bool_item, &global_hooks, false)) { return bool_item; } cJSON_Delete(bool_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number) { cJSON *number_item = cJSON_CreateNumber(number); if (add_item_to_object(object, name, number_item, &global_hooks, false)) { return number_item; } cJSON_Delete(number_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string) { cJSON *string_item = cJSON_CreateString(string); if (add_item_to_object(object, name, string_item, &global_hooks, false)) { return string_item; } cJSON_Delete(string_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw) { cJSON *raw_item = cJSON_CreateRaw(raw); if (add_item_to_object(object, name, raw_item, &global_hooks, false)) { return raw_item; } cJSON_Delete(raw_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name) { cJSON *object_item = cJSON_CreateObject(); if (add_item_to_object(object, name, object_item, &global_hooks, false)) { return object_item; } cJSON_Delete(object_item); return NULL; } CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name) { cJSON *array = cJSON_CreateArray(); if (add_item_to_object(object, name, array, &global_hooks, false)) { return array; } cJSON_Delete(array); return NULL; } CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item) { if ((parent == NULL) || (item == NULL)) { return NULL; } if (item != parent->child) { /* not the first element */ item->prev->next = item->next; } if (item->next != NULL) { /* not the last element */ item->next->prev = item->prev; } if (item == parent->child) { /* first element */ parent->child = item->next; } else if (item->next == NULL) { /* last element */ parent->child->prev = item->prev; } /* make sure the detached item doesn't point anywhere anymore */ item->prev = NULL; item->next = NULL; return item; } CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which) { if (which < 0) { return NULL; } return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which)); } CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which) { cJSON_Delete(cJSON_DetachItemFromArray(array, which)); } CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string) { cJSON *to_detach = cJSON_GetObjectItem(object, string); return cJSON_DetachItemViaPointer(object, to_detach); } CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string) { cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string); return cJSON_DetachItemViaPointer(object, to_detach); } CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string) { cJSON_Delete(cJSON_DetachItemFromObject(object, string)); } CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string) { cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string)); } /* Replace array/object items with new ones. */ CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem) { cJSON *after_inserted = NULL; if (which < 0 || newitem == NULL) { return false; } after_inserted = get_array_item(array, (size_t)which); if (after_inserted == NULL) { return add_item_to_array(array, newitem); } if (after_inserted != array->child && after_inserted->prev == NULL) { /* return false if after_inserted is a corrupted array item */ return false; } newitem->next = after_inserted; newitem->prev = after_inserted->prev; after_inserted->prev = newitem; if (after_inserted == array->child) { array->child = newitem; } else { newitem->prev->next = newitem; } return true; } CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement) { if ((parent == NULL) || (parent->child == NULL) || (replacement == NULL) || (item == NULL)) { return false; } if (replacement == item) { return true; } replacement->next = item->next; replacement->prev = item->prev; if (replacement->next != NULL) { replacement->next->prev = replacement; } if (parent->child == item) { if (parent->child->prev == parent->child) { replacement->prev = replacement; } parent->child = replacement; } else { /* * To find the last item in array quickly, we use prev in array. * We can't modify the last item's next pointer where this item was the parent's child */ if (replacement->prev != NULL) { replacement->prev->next = replacement; } if (replacement->next == NULL) { parent->child->prev = replacement; } } item->next = NULL; item->prev = NULL; cJSON_Delete(item); return true; } CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem) { if (which < 0) { return false; } return cJSON_ReplaceItemViaPointer(array, get_array_item(array, (size_t)which), newitem); } static cJSON_bool replace_item_in_object(cJSON *object, const char *string, cJSON *replacement, cJSON_bool case_sensitive) { if ((replacement == NULL) || (string == NULL)) { return false; } /* replace the name in the replacement */ if (!(replacement->type & cJSON_StringIsConst) && (replacement->string != NULL)) { cJSON_free(replacement->string); } replacement->string = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks); if (replacement->string == NULL) { return false; } replacement->type &= ~cJSON_StringIsConst; return cJSON_ReplaceItemViaPointer(object, get_object_item(object, string, case_sensitive), replacement); } CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem) { return replace_item_in_object(object, string, newitem, false); } CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object, const char *string, cJSON *newitem) { return replace_item_in_object(object, string, newitem, true); } /* Create basic types: */ CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_NULL; } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_True; } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_False; } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = boolean ? cJSON_True : cJSON_False; } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_Number; item->valuedouble = num; /* use saturation in case of overflow */ if (num >= INT_MAX) { item->valueint = INT_MAX; } else if (num <= (double)INT_MIN) { item->valueint = INT_MIN; } else { item->valueint = (int)num; } } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_String; item->valuestring = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks); if(!item->valuestring) { cJSON_Delete(item); return NULL; } } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string) { cJSON *item = cJSON_New_Item(&global_hooks); if (item != NULL) { item->type = cJSON_String | cJSON_IsReference; item->valuestring = (char*)cast_away_const(string); } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child) { cJSON *item = cJSON_New_Item(&global_hooks); if (item != NULL) { item->type = cJSON_Object | cJSON_IsReference; item->child = (cJSON*)cast_away_const(child); } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child) { cJSON *item = cJSON_New_Item(&global_hooks); if (item != NULL) { item->type = cJSON_Array | cJSON_IsReference; item->child = (cJSON*)cast_away_const(child); } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type = cJSON_Raw; item->valuestring = (char*)cJSON_strdup((const unsigned char*)raw, &global_hooks); if(!item->valuestring) { cJSON_Delete(item); return NULL; } } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void) { cJSON *item = cJSON_New_Item(&global_hooks); if(item) { item->type=cJSON_Array; } return item; } CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void) { cJSON *item = cJSON_New_Item(&global_hooks); if (item) { item->type = cJSON_Object; } return item; } /* Create Arrays: */ CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count) { size_t i = 0; cJSON *n = NULL; cJSON *p = NULL; cJSON *a = NULL; if ((count < 0) || (numbers == NULL)) { return NULL; } a = cJSON_CreateArray(); for(i = 0; a && (i < (size_t)count); i++) { n = cJSON_CreateNumber(numbers[i]); if (!n) { cJSON_Delete(a); return NULL; } if(!i) { a->child = n; } else { suffix_object(p, n); } p = n; } if (a && a->child) { a->child->prev = n; } return a; } CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count) { size_t i = 0; cJSON *n = NULL; cJSON *p = NULL; cJSON *a = NULL; if ((count < 0) || (numbers == NULL)) { return NULL; } a = cJSON_CreateArray(); for(i = 0; a && (i < (size_t)count); i++) { n = cJSON_CreateNumber((double)numbers[i]); if(!n) { cJSON_Delete(a); return NULL; } if(!i) { a->child = n; } else { suffix_object(p, n); } p = n; } if (a && a->child) { a->child->prev = n; } return a; } CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count) { size_t i = 0; cJSON *n = NULL; cJSON *p = NULL; cJSON *a = NULL; if ((count < 0) || (numbers == NULL)) { return NULL; } a = cJSON_CreateArray(); for(i = 0; a && (i < (size_t)count); i++) { n = cJSON_CreateNumber(numbers[i]); if(!n) { cJSON_Delete(a); return NULL; } if(!i) { a->child = n; } else { suffix_object(p, n); } p = n; } if (a && a->child) { a->child->prev = n; } return a; } CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count) { size_t i = 0; cJSON *n = NULL; cJSON *p = NULL; cJSON *a = NULL; if ((count < 0) || (strings == NULL)) { return NULL; } a = cJSON_CreateArray(); for (i = 0; a && (i < (size_t)count); i++) { n = cJSON_CreateString(strings[i]); if(!n) { cJSON_Delete(a); return NULL; } if(!i) { a->child = n; } else { suffix_object(p,n); } p = n; } if (a && a->child) { a->child->prev = n; } return a; } /* Duplication */ CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse) { cJSON *newitem = NULL; cJSON *child = NULL; cJSON *next = NULL; cJSON *newchild = NULL; /* Bail on bad ptr */ if (!item) { goto fail; } /* Create new item */ newitem = cJSON_New_Item(&global_hooks); if (!newitem) { goto fail; } /* Copy over all vars */ newitem->type = item->type & (~cJSON_IsReference); newitem->valueint = item->valueint; newitem->valuedouble = item->valuedouble; if (item->valuestring) { newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring, &global_hooks); if (!newitem->valuestring) { goto fail; } } if (item->string) { newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string, &global_hooks); if (!newitem->string) { goto fail; } } /* If non-recursive, then we're done! */ if (!recurse) { return newitem; } /* Walk the ->next chain for the child. */ child = item->child; while (child != NULL) { newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */ if (!newchild) { goto fail; } if (next != NULL) { /* If newitem->child already set, then crosswire ->prev and ->next and move on */ next->next = newchild; newchild->prev = next; next = newchild; } else { /* Set newitem->child and move to it */ newitem->child = newchild; next = newchild; } child = child->next; } if (newitem && newitem->child) { newitem->child->prev = newchild; } return newitem; fail: if (newitem != NULL) { cJSON_Delete(newitem); } return NULL; } static void skip_oneline_comment(char **input) { *input += static_strlen("//"); for (; (*input)[0] != '\0'; ++(*input)) { if ((*input)[0] == '\n') { *input += static_strlen("\n"); return; } } } static void skip_multiline_comment(char **input) { *input += static_strlen("/*"); for (; (*input)[0] != '\0'; ++(*input)) { if (((*input)[0] == '*') && ((*input)[1] == '/')) { *input += static_strlen("*/"); return; } } } static void minify_string(char **input, char **output) { (*output)[0] = (*input)[0]; *input += static_strlen("\""); *output += static_strlen("\""); for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) { (*output)[0] = (*input)[0]; if ((*input)[0] == '\"') { (*output)[0] = '\"'; *input += static_strlen("\""); *output += static_strlen("\""); return; } else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) { (*output)[1] = (*input)[1]; *input += static_strlen("\""); *output += static_strlen("\""); } } } CJSON_PUBLIC(void) cJSON_Minify(char *json) { char *into = json; if (json == NULL) { return; } while (json[0] != '\0') { switch (json[0]) { case ' ': case '\t': case '\r': case '\n': json++; break; case '/': if (json[1] == '/') { skip_oneline_comment(&json); } else if (json[1] == '*') { skip_multiline_comment(&json); } else { json++; } break; case '\"': minify_string(&json, (char**)&into); break; default: into[0] = json[0]; json++; into++; } } /* and null-terminate. */ *into = '\0'; } CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_Invalid; } CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_False; } CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xff) == cJSON_True; } CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & (cJSON_True | cJSON_False)) != 0; } CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_NULL; } CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_Number; } CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_String; } CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_Array; } CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_Object; } CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item) { if (item == NULL) { return false; } return (item->type & 0xFF) == cJSON_Raw; } CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive) { if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF))) { return false; } /* check if type is valid */ switch (a->type & 0xFF) { case cJSON_False: case cJSON_True: case cJSON_NULL: case cJSON_Number: case cJSON_String: case cJSON_Raw: case cJSON_Array: case cJSON_Object: break; default: return false; } /* identical objects are equal */ if (a == b) { return true; } switch (a->type & 0xFF) { /* in these cases and equal type is enough */ case cJSON_False: case cJSON_True: case cJSON_NULL: return true; case cJSON_Number: if (compare_double(a->valuedouble, b->valuedouble)) { return true; } return false; case cJSON_String: case cJSON_Raw: if ((a->valuestring == NULL) || (b->valuestring == NULL)) { return false; } if (strcmp(a->valuestring, b->valuestring) == 0) { return true; } return false; case cJSON_Array: { cJSON *a_element = a->child; cJSON *b_element = b->child; for (; (a_element != NULL) && (b_element != NULL);) { if (!cJSON_Compare(a_element, b_element, case_sensitive)) { return false; } a_element = a_element->next; b_element = b_element->next; } /* one of the arrays is longer than the other */ if (a_element != b_element) { return false; } return true; } case cJSON_Object: { cJSON *a_element = NULL; cJSON *b_element = NULL; cJSON_ArrayForEach(a_element, a) { /* TODO This has O(n^2) runtime, which is horrible! */ b_element = get_object_item(b, a_element->string, case_sensitive); if (b_element == NULL) { return false; } if (!cJSON_Compare(a_element, b_element, case_sensitive)) { return false; } } /* doing this twice, once on a and b to prevent true comparison if a subset of b * TODO: Do this the proper way, this is just a fix for now */ cJSON_ArrayForEach(b_element, b) { a_element = get_object_item(a, b_element->string, case_sensitive); if (a_element == NULL) { return false; } if (!cJSON_Compare(b_element, a_element, case_sensitive)) { return false; } } return true; } default: return false; } } CJSON_PUBLIC(void *) cJSON_malloc(size_t size) { return global_hooks.allocate(size); } CJSON_PUBLIC(void) cJSON_free(void *object) { global_hooks.deallocate(object); object = NULL; } #endif //silver_chain_scope_start //DONT MODIFY THIS COMMENT //this import is computationally generated //mannaged by SilverChain: https://github.com/OUIsolutions/SilverChain //silver_chain_scope_end long private_BearsslHttps_strlen(const char *str){ long size = 0; while(str[size] != '\0'){ size++; } return size; } int private_BearsslHttp_strcmp(const char *str1,const char *str2){ long size1 = private_BearsslHttps_strlen(str1); long size2 = private_BearsslHttps_strlen(str2); if(size1 != size2){ return 1; } for(long i = 0; i < size1; i++){ if(str1[i] != str2[i]){ return 1; } } return 0; } bool private_BearsslHttps_startswith(const char *str,const char *prefix){ long size = private_BearsslHttps_strlen(prefix); for(long i = 0; i < size; i++){ if(str[i] != prefix[i]){ return false; } } return true; } char * private_BearsslHttps_strdup(const char *str){ long size = private_BearsslHttps_strlen(str); char *new_str = (char *)BearsslHttps_allocate(size+1); for(long i = 0; i < size; i++){ new_str[i] = str[i]; } new_str[size] = '\0'; return new_str; } char * private_BearsslHttps_strcpy( char *dest,const char *str){ long size = private_BearsslHttps_strlen(str); for(long i = 0; i < size; i++){ dest[i] = str[i]; } return dest; } char * private_BearsslHttps_strndup(const char *str,int size){ char *new_str = (char *)BearsslHttps_allocate(size+1); for(int i = 0; i < size; i++){ new_str[i] = str[i]; } new_str[size] = 0; return new_str; } int private_BearsslHttps_indexof_from_point(const char *str,char c,int start){ long size = private_BearsslHttps_strlen(str); for(int i = start; i < size; i++){ if(str[i] == c){ return i; } } return -1; } char private_BearsslHttps_parse_char_to_lower(char c){ if(c >= 'A' && c <= 'Z'){ return c + 32; } return c; } #endif