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

   1 <?php
   2
   3 // $CVSHeader$
   4
   5 /*
   6 V4.01 23 Oct 2003  (c) 2000-2004 John Lim (jlim@natsoft.com.my). All rights reserved.
   7          Contributed by Ross Smith (adodb@netebb.com).
   8   Released under both BSD license and Lesser GPL library license.
   9   Whenever there is any discrepancy between the two licenses,
  10   the BSD license will take precedence.
  11           Set tabs to 4 for best viewing.
  12
  13 */
  14
  15 if (!function_exists('mcrypt_encrypt')) {
  16         trigger_error('Mcrypt functions are not available', E_USER_ERROR);
  17         return 0;
  18 }
  19
  20 /**
  21  */
  22 class ADODB_Encrypt_MCrypt {
  23         /**
  24          */
  25         var $_cipher;
  26
  27         /**
  28          */
  29         var $_mode;
  30
  31         /**
  32          */
  33         var $_source;
  34
  35         /**
  36          */
  37         function getCipher() {
  38                 return $this->_cipher;
  39         }
  40
  41         /**
  42          */
  43         function setCipher($cipher) {
  44                 $this->_cipher = $cipher;
  45         }
  46
  47         /**
  48          */
  49         function getMode() {
  50                 return $this->_mode;
  51         }
  52
  53         /**
  54          */
  55         function setMode($mode) {
  56                 $this->_mode = $mode;
  57         }
  58
  59         /**
  60          */
  61         function getSource() {
  62                 return $this->_source;
  63         }
  64
  65         /**
  66          */
  67         function setSource($source) {
  68                 $this->_source = $source;
  69         }
  70
  71         /**
  72          */
  73         function ADODB_Encrypt_MCrypt($cipher = null, $mode = null, $source = null) {
  74                 if (!$cipher) {
  75                         $cipher = MCRYPT_RIJNDAEL_256;
  76                 }
  77                 if (!$mode) {
  78                         $mode = MCRYPT_MODE_ECB;
  79                 }
  80                 if (!$source) {
  81                         $source = MCRYPT_RAND;
  82                 }
  83
  84                 $this->_cipher = $cipher;
  85                 $this->_mode = $mode;
  86                 $this->_source = $source;
  87         }
  88
  89         /**
  90          */
  91         function write($data, $key) {
  92                 $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
  93                 $iv = mcrypt_create_iv($iv_size, $this->_source);
  94                 return mcrypt_encrypt($this->_cipher, $key, $data, $this->_mode, $iv);
  95         }
  96
  97         /**
  98          */
  99         function read($data, $key) {
 100                 $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
 101                 $iv = mcrypt_create_iv($iv_size, $this->_source);
 102                 $rv = mcrypt_decrypt($this->_cipher, $key, $data, $this->_mode, $iv);
 103                 return rtrim($rv, "\0");
 104         }
 105
 106 }
 107
 108 return 1;
 109
 110 ?>