61 lines
1.7 KiB
PHP
61 lines
1.7 KiB
PHP
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<?php
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/**
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* Zeed Platform Project
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* Based on Zeed Framework & Zend Framework.
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*
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* BTS - Billing Transaction Service
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* CAS - Central Authentication Service
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*
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* LICENSE
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* http://www.zeed.com.cn/license/
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*
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* @category Zeed
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* @package Zeed_ChangeMe
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* @subpackage ChangeMe
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* @copyright Copyright (c) 2010 Zeed Technologies PRC Inc. (http://www.zeed.com.cn)
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* @author Zeed Team (http://blog.zeed.com.cn)
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* @since 2010-8-31
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* @version SVN: $Id$
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*/
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class Zeed_Encrypt_3Des extends Zeed_Encrypt_Abstract
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{
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public function __construct($data = null, $salt = null, $encrypted = false)
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{
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if (!extension_loaded('mcrypt')) {
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throw new Zeed_Exception('The mcrypt extension must be loaded for using this encrypt !');
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}
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parent::__construct($data, $salt, $encrypted);
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}
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public function encrypt()
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{
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$this->_salt = substr($this->_salt, 0, 24);
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$td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_ECB, '');
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$size = mcrypt_enc_get_iv_size($td);
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$this->_data = $this->_pkcs5Pad($this->_data, $size);
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$iv = mcrypt_create_iv ($size, MCRYPT_RAND);
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mcrypt_generic_init($td, $this->_salt, $iv);
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$cipher = base64_encode(mcrypt_generic($td, $this->_data));
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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return $cipher;
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}
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/**
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*
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* @param string $text
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* @param unknown_type $blocksize
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* @return string
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* @see http://www.rsa.com/rsalabs/node.asp?id=2127
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*/
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private function _pkcs5Pad($text, $blocksize)
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{
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$pad = $blocksize - (strlen($text) % $blocksize);
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return $text . str_repeat(chr($pad), $pad);
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}
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}
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