Vendo's encryption and decryption methods.

vendo_encryption_decryption_methods.php

<?php
namespace Vendo;
/**
 * Usage:
 * <?php
 *  include '/path/to/vendo_encryption_decryption_methods.php';
 *
 *  $plainTextUserPassword = 'the plain text password goes here';
 *  $vendoSharedSecret = 'the shared secret';
 *
 *  //encrypting the password:
 *  $encryptedPasswordBinaryData = \Vendo\Encryption::aes128Encrypt($plainTextUserPassword, $vendoSharedSecret);
 *  $encryptedPassword = bin2hex($encryptedPasswordBinaryData);
 *  //pass $encryptedPassword to Vendo
 *
 *
 *  //In case you need to decrypt the password:
 *  $encryptedPasswordBinaryData = pack('H*', $encryptedPassword);
 *  $decryptedPassword = \Vendo\Encryption::aes128Decrypt($encryptedPasswordBinaryData, $vendoSharedSecret);
 *  //$decryptedPassword contains the plain text password
 * ?>
 *
 */
class Encryption
{
    const METHOD = 'AES-128-ECB';
    /**
     * Encrypts a string using AES128.
     * This method generates exactly the same output as MySQL's AES_ENCRYPT() function.
     *
     * @param string $uncryptedData
     * @param string $key The key to use in the encryption.
     * @return string The result is binary!
     */
    public static function aes128Encrypt($uncryptedData, $key)
    {
        $ivSize = openssl_cipher_iv_length(self::METHOD);
        $iv = openssl_random_pseudo_bytes($ivSize);
        $encryptedData = openssl_encrypt($uncryptedData, self::METHOD, $key, OPENSSL_RAW_DATA, $iv);
        
        return $encryptedData;
    }

    /**
     * Decrypts a string that was encrypted using AES128
     * This method generates exactly the same output as MySQL's AES_DECRYPT() function.
     *
     * @param string $encryptedData
     * @param string $key
     * @return string
     */
    public static function aes128Decrypt($encryptedData, $key)
    {
        $ivSize = openssl_cipher_iv_length(self::METHOD);
        $iv = openssl_random_pseudo_bytes($ivSize);
        $decryptedData = openssl_decrypt($encryptedData, self::METHOD, $key, OPENSSL_RAW_DATA, $iv);
        
        return $decryptedData;
    }
}