[Sommaire] [Imprimer]

   1  <?php
   2  
   3  
   4  /*
   5  V4.90 8 June 2006  (c) 2000-2006 John Lim (jlim#natsoft.com.my). 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  ?>