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36 kaklik 1 
<?php
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/*
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V4.80 8 Mar 2006  (c) 2000-2006 John Lim (jlim@natsoft.com.my). All rights reserved.
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         Contributed by Ross Smith (adodb@netebb.com).
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  Released under both BSD license and Lesser GPL library license.
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  Whenever there is any discrepancy between the two licenses,
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  the BSD license will take precedence.
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	  Set tabs to 4 for best viewing.
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*/
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if (!function_exists('mcrypt_encrypt')) {
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	trigger_error('Mcrypt functions are not available', E_USER_ERROR);
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	return 0;
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}
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/**
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 */
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class ADODB_Encrypt_MCrypt {
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	/**
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	 */
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	var $_cipher;
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	/**
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	 */
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	var $_mode;
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	/**
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	 */
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	var $_source;
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	/**
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	 */
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	function getCipher() {
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		return $this->_cipher;
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	}
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	/**
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	 */
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	function setCipher($cipher) {
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		$this->_cipher = $cipher;
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	}
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	/**
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	 */
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	function getMode() {
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		return $this->_mode;
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	}
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	/**
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	 */
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	function setMode($mode) {
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		$this->_mode = $mode;
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	}
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	/**
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	 */
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	function getSource() {
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		return $this->_source;
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	}
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	/**
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	 */
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	function setSource($source) {
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		$this->_source = $source;
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	}
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	/**
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	 */
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	function ADODB_Encrypt_MCrypt($cipher = null, $mode = null, $source = null) {
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		if (!$cipher) {
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			$cipher = MCRYPT_RIJNDAEL_256;
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		}
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		if (!$mode) {
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			$mode = MCRYPT_MODE_ECB;
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		}
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		if (!$source) {
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			$source = MCRYPT_RAND;
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		}
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		$this->_cipher = $cipher;
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		$this->_mode = $mode;
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		$this->_source = $source;
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	}
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	/**
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	 */
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	function write($data, $key) {
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		$iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
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		$iv = mcrypt_create_iv($iv_size, $this->_source);
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		return mcrypt_encrypt($this->_cipher, $key, $data, $this->_mode, $iv);
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	}
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	/**
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	 */
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	function read($data, $key) {
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		$iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
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		$iv = mcrypt_create_iv($iv_size, $this->_source);
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		$rv = mcrypt_decrypt($this->_cipher, $key, $data, $this->_mode, $iv);
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		return rtrim($rv, "\0");
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	}
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}
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return 1;
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?>