library/adodb/session/adodb-encrypt-mcrypt.php

   1 <?php
   2
   3
   4 /*
   5 V5.14 8 Sept 2011  (c) 2000-2011 John Lim (jlim#natsoft.com). All rights reserved.
   6          Contributed by Ross Smith (adodb@netebb.com).
   7   Released under both BSD license and Lesser GPL library license.
   8   Whenever there is any discrepancy between the two licenses,
   9   the BSD license will take precedence.
  10           Set tabs to 4 for best viewing.
  11
  12 */
  13
  14 if (!function_exists('mcrypt_encrypt')) {
  15         trigger_error('Mcrypt functions are not available', E_USER_ERROR);
  16         return 0;
  17 }
  18
  19 /**
  20  */
  21 class ADODB_Encrypt_MCrypt {
  22         /**
  23          */
  24         var $_cipher;
  25
  26         /**
  27          */
  28         var $_mode;
  29
  30         /**
  31          */
  32         var $_source;
  33
  34         /**
  35          */
  36         function getCipher() {
  37                 return $this->_cipher;
  38         }
  39
  40         /**
  41          */
  42         function setCipher($cipher) {
  43                 $this->_cipher = $cipher;
  44         }
  45
  46         /**
  47          */
  48         function getMode() {
  49                 return $this->_mode;
  50         }
  51
  52         /**
  53          */
  54         function setMode($mode) {
  55                 $this->_mode = $mode;
  56         }
  57
  58         /**
  59          */
  60         function getSource() {
  61                 return $this->_source;
  62         }
  63
  64         /**
  65          */
  66         function setSource($source) {
  67                 $this->_source = $source;
  68         }
  69
  70         /**
  71          */
  72         function ADODB_Encrypt_MCrypt($cipher = null, $mode = null, $source = null) {
  73                 if (!$cipher) {
  74                         $cipher = MCRYPT_RIJNDAEL_256;
  75                 }
  76                 if (!$mode) {
  77                         $mode = MCRYPT_MODE_ECB;
  78                 }
  79                 if (!$source) {
  80                         $source = MCRYPT_RAND;
  81                 }
  82
  83                 $this->_cipher = $cipher;
  84                 $this->_mode = $mode;
  85                 $this->_source = $source;
  86         }
  87
  88         /**
  89          */
  90         function write($data, $key) {
  91                 $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
  92                 $iv = mcrypt_create_iv($iv_size, $this->_source);
  93                 return mcrypt_encrypt($this->_cipher, $key, $data, $this->_mode, $iv);
  94         }
  95
  96         /**
  97          */
  98         function read($data, $key) {
  99                 $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
 100                 $iv = mcrypt_create_iv($iv_size, $this->_source);
 101                 $rv = mcrypt_decrypt($this->_cipher, $key, $data, $this->_mode, $iv);
 102                 return rtrim($rv, "\0");
 103         }
 104
 105 }
 106
 107 return 1;
 108
 109 ?>