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import mathimport randomMOD_ALL = 1114112# Columnar Transpositiond - Pastebin.com
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- import math
- import random
- MOD_ALL = 1114112
- # Columnar Transposition
- def columnar_encrypt(text, pad):
- cols = random.randint(1, len(text) - 1)
- rows = math.ceil(len(text) / cols)
- padded = text.ljust((rows * cols), str(chr(pad)))
- table = [padded[i:i+cols] for i in range(0, len(padded), cols)]
- result = ""
- for y in range(len(table[0])):
- for r in range(len(table)):
- result += table[r][y]
- return result, rows
- def columnar_decrypt(ciphertext, key, pad):
- rows = key
- table = [ciphertext[i:i+rows] for i in range(0, len(ciphertext), rows)]
- res = ""
- for a in range(rows):
- for b in range(len(table)):
- res += table[b][a]
- return res.rstrip(str(chr(pad)))
- # Hill Encrypt
- def keygen(l):
- while True:
- if l % 2 == 0:
- a, b, c, d = [random.randint(0, MOD_ALL) for _ in range(4)]
- det = (a*d - b*c) % MOD_ALL
- if det < MOD_ALL and math.gcd(det, MOD_ALL) == 1:
- return f"{a}-{b}-{c}-{d}"
- else:
- a, b, c, d, e, f, g, h ,i = [random.randint(0, 99) for _ in range(9)]
- det = (a*e*i + b*f*g + c*d*h - b*d*i - a*f*h - c*e*g) % MOD_ALL
- if det < MOD_ALL and math.gcd(det, MOD_ALL) == 1:
- return f"{a}-{b}-{c}-{d}-{e}-{f}-{g}-{h}-{i}"
- def key_separator(k):
- return k.split("-")
- def hexcon(h):
- return str(format(h, "06X"))
- def hill_encrypt(pl, k):
- cipher = ""
- if len(pl) % 2 == 0:
- for i in range(0, len(pl), 2):
- vec = [int(ord(pl[i])), int(ord(pl[i+1]))]
- bl1 = (int(k[0])*vec[0] + int(k[1])*vec[1]) % MOD_ALL
- bl2 = (int(k[2])*vec[0] + int(k[3])*vec[1]) % MOD_ALL
- cipher += hexcon(bl1) + hexcon(bl2)
- else:
- for i in range(0, len(pl), 3):
- vec = [int(ord(pl[i])), int(ord(pl[i+1])), int(ord(pl[i+2]))]
- bl1 = (int(k[0])*vec[0] + int(k[1])*vec[1] + int(k[2])*vec[2]) % MOD_ALL
- bl2 = (int(k[3])*vec[0] + int(k[4])*vec[1] + int(k[5])*vec[2]) % MOD_ALL
- bl3 = (int(k[6])*vec[0] + int(k[7])*vec[1] + int(k[8])*vec[2]) % MOD_ALL
- cipher += hexcon(bl1) + hexcon(bl2) + hexcon(bl3)
- return cipher
- def matrix_inverse_2x2(k):
- a, b, c, d = map(int, k)
- det = (a*d - b*c) % MOD_ALL
- inv_det = pow(det, -1, MOD_ALL)
- return [( d*inv_det) % MOD_ALL,
- (-b*inv_det) % MOD_ALL,
- (-c*inv_det) % MOD_ALL,
- ( a*inv_det) % MOD_ALL]
- def matrix_inverse_3x3(k):
- a,b,c,d,e,f,g,h,i = map(int, k)
- det = (a*e*i + b*f*g + c*d*h - b*d*i - a*f*h - c*e*g) % MOD_ALL
- inv_det = pow(det, -1, MOD_ALL)
- A = (e*i - f*h) % MOD_ALL
- B = (-(b*i - c*h)) % MOD_ALL
- C = (b*f - c*e) % MOD_ALL
- D = (-(d*i - f*g)) % MOD_ALL
- E = (a*i - c*g) % MOD_ALL
- F = (-(a*f - c*d)) % MOD_ALL
- G = (d*h - e*g) % MOD_ALL
- H = (-(a*h - b*g)) % MOD_ALL
- I = (a*e - b*d) % MOD_ALL
- adj = [A, B, C,
- D, E, F,
- G, H, I]
- return [(x * inv_det) % MOD_ALL for x in adj]
- def hex_to_int_blocks(cipher, block_size):
- values = [int(cipher[i:i+6], 16) for i in range(0, len(cipher), 6)]
- return [values[i:i+block_size] for i in range(0, len(values), block_size)]
- def hill_decrypt(cipher, k, pad):
- plain = ""
- if len(k) == 4:
- invK = matrix_inverse_2x2(k)
- blocks = hex_to_int_blocks(cipher, 2)
- for vec in blocks:
- x = (invK[0]*vec[0] + invK[1]*vec[1]) % MOD_ALL
- y = (invK[2]*vec[0] + invK[3]*vec[1]) % MOD_ALL
- plain += chr(x) + chr(y)
- else:
- invK = matrix_inverse_3x3(k)
- blocks = hex_to_int_blocks(cipher, 3)
- for vec in blocks:
- x = (invK[0]*vec[0] + invK[1]*vec[1] + invK[2]*vec[2]) % MOD_ALL
- y = (invK[3]*vec[0] + invK[4]*vec[1] + invK[5]*vec[2]) % MOD_ALL
- z = (invK[6]*vec[0] + invK[7]*vec[1] + invK[8]*vec[2]) % MOD_ALL
- plain += chr(x) + chr(y) + chr(z)
- return plain.rstrip(str(chr(pad)))
- if __name__ == "__main__":
- print("="*100)
- print("Welcome to Hill Fences Superencryption")
- print("1.Encryption\n2.Decryption\n")
- opt = int(input("Select an option: "))
- print("="*100)
- if opt == 1:
- padding_random_hill = random.randint(0, MOD_ALL)
- padding_random_columnar = random.randint(0, MOD_ALL)
- text = input("Write your text: \n")
- col_encrypted = columnar_encrypt(text, padding_random_columnar)
- col_res, key = col_encrypted
- padding_random_ = random.randint(0, MOD_ALL)
- if len(col_res) % 2 != 0 and len(col_res) % 3 != 0:
- col_res += str(chr(padding_random_hill))
- hill_key_str = keygen(len(col_res))
- hill_key = key_separator(hill_key_str)
- final = hill_encrypt(col_res, hill_key)
- print("\n"+ "="*100)
- print("Final Cipher:\n" + final + "\n")
- print(f"Key: \n{padding_random_columnar}-{padding_random_hill}-{key}-{hill_key_str}")
- elif opt == 2:
- text = input("Write your cipher: \n")
- print()
- key = input("Write your key: ")
- splitted_key = key.split("-")
- hill_key = [int(x) for x in splitted_key[3:]]
- hill_decrypted = hill_decrypt(text, hill_key, int(splitted_key[1]))
- final_plain = columnar_decrypt(hill_decrypted, int(splitted_key[2]), int(splitted_key[0]))
- print()
- print("Decrypted message: \n" + final_plain)
- print("\n"+ "="*100)
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