<?php/** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category   Zend * @package    Zend_InfoCard * @subpackage Zend_InfoCard_Cipher * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com) * @license    http://framework.zend.com/license/new-bsd     New BSD License * @version    $Id: Aes256cbc.php 8064 2008-02-16 10:58:39Z thomas $ * @author     John Coggeshall <john@zend.com> *//** * Zend_InfoCard_Cipher_Symmetric_Adapter_Abstract */require_once 'Zend/InfoCard/Cipher/Symmetric/Adapter/Abstract.php';/** * Zend_InfoCard_Cipher_Symmetric_Aes256cbc_Interface */require_once 'Zend/InfoCard/Cipher/Symmetric/Aes256cbc/Interface.php';/** * Zend_InfoCard_Cipher_Exception */require_once 'Zend/InfoCard/Cipher/Exception.php';/** * Implements AES256 with CBC encryption implemented using the mCrypt extension * * @category   Zend * @package    Zend_InfoCard * @subpackage Zend_InfoCard_Cipher * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com) * @license    http://framework.zend.com/license/new-bsd     New BSD License * @author     John Coggeshall <john@zend.com> */class Zend_InfoCard_Cipher_Symmetric_Adapter_Aes256cbc    extends Zend_InfoCard_Cipher_Symmetric_Adapter_Abstract    implements Zend_InfoCard_Cipher_Symmetric_Aes256cbc_Interface{    /**     * The MCRYPT Cipher constant for this encryption     */    const MCRYPT_CIPHER = MCRYPT_RIJNDAEL_128;    /**     * The MCRYPT Mode constant for this encryption     */    const MCRYPT_MODE   = MCRYPT_MODE_CBC;    /**     * The default length of the IV to use     */    const IV_LENGTH     = 16;    /**     * The object constructor     *     * @throws Zend_InfoCard_Cipher_Exception     */    public function __construct()    {        // Can't test for this        // @codeCoverageIgnoreStart        if(!extension_loaded('mcrypt')) {            throw new Zend_InfoCard_Cipher_Exception("Use of the AES256CBC Cipher requires the mcrypt extension");        }        // @codeCoveregIgnoreEnd    }    /**     * Decrypts data using the AES Algorithm using the mCrypt extension     *     * @throws Zend_InfoCard_Cipher_Exception     * @param string $encryptedData The encrypted data in binary format     * @param string $decryptionKey The decryption key     * @param integer $iv_length The IV length to use     * @return string the decrypted data with any terminating nulls removed     */    public function decrypt($encryptedData, $decryptionKey, $iv_length = null)    {        $iv_length = is_null($iv_length) ? self::IV_LENGTH : $iv_length;        $mcrypt_iv = null;        if($iv_length > 0) {             $mcrypt_iv = substr($encryptedData, 0, $iv_length);            $encryptedData = substr($encryptedData, $iv_length);        }        $decrypted = mcrypt_decrypt(self::MCRYPT_CIPHER, $decryptionKey, $encryptedData, self::MCRYPT_MODE, $mcrypt_iv);        if(!$decrypted) {            throw new Zend_InfoCard_Cipher_Exception("Failed to decrypt data using AES256CBC Algorithm");        }        $decryptedLength = strlen($decrypted);        $paddingLength = substr($decrypted, $decryptedLength -1, 1);        $decrypted = substr($decrypted, 0, $decryptedLength - ord($paddingLength));        return rtrim($decrypted, "\0");    }}