how to decrypt magento dataencrypted - php

Question

i want to decrypt magento data using the data encrypted and config key to show the data as plan test
i tried alotof ways but no one has done with me is there any way
i mean is there any way as php script to do it
and thanks
i used this code i found here but doesn't show anything
<?php
class Encryption
{
const CIPHER = MCRYPT_RIJNDAEL_128; // Rijndael-128 is AES
const MODE = MCRYPT_MODE_CBC;
/* Cryptographic key of length 16, 24 or 32. NOT a password! */
private $key;
public function __construct($key) {
$this->key = $key;
}
public function encrypt($plaintext) {
$ivSize = mcrypt_get_iv_size(self::CIPHER, self::MODE);
$iv = mcrypt_create_iv($ivSize, MCRYPT_DEV_RANDOM);
$ciphertext = mcrypt_encrypt(self::CIPHER, $this->key, $plaintext, self::MODE, $iv);
return base64_encode($iv.$ciphertext);
}
public function decrypt($ciphertext) {
$ciphertext = base64_decode($ciphertext);
$ivSize = mcrypt_get_iv_size(self::CIPHER, self::MODE);
if (strlen($ciphertext) < $ivSize) {
throw new Exception('Missing initialization vector');
}
$iv = substr($ciphertext, 0, $ivSize);
$ciphertext = substr($ciphertext, $ivSize);
$plaintext = mcrypt_decrypt(self::CIPHER, $this->key, $ciphertext, self::MODE, $iv);
return rtrim($plaintext, "\0");
}
}

Answer 1

In simplest case, when we use all of standard Magento settings:
Encryptor get from model core/encryption,
Key from setting global/crypt/key
Using Mcrypt
With standard cipher MCRYPT_BLOWFISH and mode MCRYPT_MODE_ECB
(all given for Magento 1.8.1)
$encrypted = 'R4VQyYn6JHs=';
$key = '370ee4d319aebb395b982d72190588d2';
$cipher = MCRYPT_BLOWFISH;
$mode = MCRYPT_MODE_ECB;
$handler = mcrypt_module_open($cipher, '', $mode, '');
$initVector = mcrypt_create_iv (mcrypt_enc_get_iv_size($handler), MCRYPT_RAND);
mcrypt_generic_init($handler, $key, $initVector);
var_dump(str_replace("\x0", '', trim(mdecrypt_generic($handler, base64_decode($encrypted)))));
However, I can't see a point in using this, since you can use Magento, and just call
Magento::helper('core')->decrypt($encrypted);