Decrypt encrypted (for which password is already known) XLSX files with PHP.

Update: It also works for DOCX and PPTX files (can someone suggest a better name for this repo?).

I have not tested for XLS/DOC/PPT files yet.

Dependencies:

• OLE
• PEAR

I have made a small change in System.php file of PEAR package - commented out require_once 'Console/Getopt.php'; because this script does not need it, so we can avoid downloading Console_Getopt package.

<?php
require_once('PHPDecryptXLSXWithPassword.php');
$encryptedFilePath = '../path/to/encrypted/file.xlsx';
$password = 'mypassword'; // password to "open" the file
$decryptedFilePath = '../path/to/decrypted/file.xlsx';
decrypt($encryptedFilePath, $password, $decryptedFilePath);

• This repo is made possible by Python's msoffcrypto-tool, which is used for decrypting various files with a known password.
• I have also used encryption/decryption logic from Python's cryptography module, which is also used in the msoffcrypto-tool.

This will work if the input file is encrypted, and the password is correct. However, I have developed this just for a quick dirty task and there is no error checking whatsoever. Please DO NOT use in production.

Note: This is my first github repo, so any suggestions (regarding code or documentation or whatever) are more than welcome.