source: Dev/trunk/rdfapi/util/adodb/session/adodb-encrypt-mcrypt.php @ 12

<?php


/*
V4.94 23 Jan 2007  (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
         Contributed by Ross Smith (adodb@netebb.com). 
  Released under both BSD license and Lesser GPL library license.
  Whenever there is any discrepancy between the two licenses,
  the BSD license will take precedence.
          Set tabs to 4 for best viewing.

*/

if (!function_exists('mcrypt_encrypt')) {
        trigger_error('Mcrypt functions are not available', E_USER_ERROR);
        return 0;
}

/**
 */
class ADODB_Encrypt_MCrypt {
        /**
         */
        var $_cipher;

        /**
         */
        var $_mode;

        /**
         */
        var $_source;

        /**
         */
        function getCipher() {
                return $this->_cipher;
        }

        /**
         */
        function setCipher($cipher) {
                $this->_cipher = $cipher;
        }

        /**
         */
        function getMode() {
                return $this->_mode;
        }

        /**
         */
        function setMode($mode) {
                $this->_mode = $mode;
        }

        /**
         */
        function getSource() {
                return $this->_source;
        }

        /**
         */
        function setSource($source) {
                $this->_source = $source;
        }

        /**
         */
        function ADODB_Encrypt_MCrypt($cipher = null, $mode = null, $source = null) {
                if (!$cipher) {
                        $cipher = MCRYPT_RIJNDAEL_256;
                }
                if (!$mode) {
                        $mode = MCRYPT_MODE_ECB;
                }
                if (!$source) {
                        $source = MCRYPT_RAND;
                }

                $this->_cipher = $cipher;
                $this->_mode = $mode;
                $this->_source = $source;
        }

        /**
         */
        function write($data, $key) {
                $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
                $iv = mcrypt_create_iv($iv_size, $this->_source);
                return mcrypt_encrypt($this->_cipher, $key, $data, $this->_mode, $iv);
        }

        /**
         */
        function read($data, $key) {
                $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
                $iv = mcrypt_create_iv($iv_size, $this->_source);
                $rv = mcrypt_decrypt($this->_cipher, $key, $data, $this->_mode, $iv);
                return rtrim($rv, "\0");
        }

}

return 1;

?>