Cipher.php

   1 <?php
   2
   3   /*
   4    * Some AES encryption. Works in PHP 4 or 5.
   5    * Scrounged on the web, and made to work.
   6    */
   7
   8 class Cipher {
   9   var $securekey, $iv;
  10   var $enc, $mode;
  11
  12   function Cipher($textkey) {
  13     $this->enc = MCRYPT_RIJNDAEL_128;
  14     $this->mode = MCRYPT_MODE_ECB;
  15     $this->securekey = mhash(MHASH_SHA256,$textkey);
  16     $iv_size = mcrypt_get_iv_size($this->enc, $this->mode);
  17     $this->iv = mcrypt_create_iv($iv_size, MCRYPT_DEV_RANDOM);
  18   }
  19
  20   function encrypt($input) {
  21     return mcrypt_encrypt($this->enc, $this->securekey, $input, $this->mode, $this->iv);
  22   }
  23
  24   function decrypt($input) {
  25     return trim(mcrypt_decrypt($this->enc, $this->securekey, $input, $this->mode, $this->iv));
  26   }
  27
  28   function encrypt2hex($input) {
  29     return bin2hex($this->encrypt($input));
  30   }
  31
  32   function decrypthex($input) {
  33     return $this->decrypt(pack("H*", $input));
  34   }
  35 }
  36
  37 /* test code
  38 $cipher = new Cipher('secret passphrase');
  39
  40 $encryptedtext = $cipher->encrypt2hex(pack("H*", "1650f617c024d6441461b2538c6d9540"));
  41 echo "->encrypt = $encryptedtext<br />";
  42
  43 $decryptedtext = bin2hex($cipher->decrypthex($encryptedtext));
  44 echo "->decrypt = $decryptedtext<br />";
  45
  46 var_dump($cipher);
  47 */
  48
  49 /* ***** BEGIN LICENSE BLOCK *****
  50  * Version: MPL 1.1/GPL 2.0/LGPL 2.1/Apache 2.0
  51  *
  52  * The contents of this file are subject to the Mozilla Public License Version
  53  * 1.1 (the "License"); you may not use this file except in compliance with
  54  * the License. You may obtain a copy of the License at
  55  * http://www.mozilla.org/MPL/
  56  *
  57  * Software distributed under the License is distributed on an "AS IS" basis,
  58  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  59  * for the specific language governing rights and limitations under the
  60  * License.
  61  *
  62  * The Original Code is LoomClient PHP library
  63  *
  64  * The Initial Developer of the Original Code is
  65  * Bill St. Clair.
  66  * Portions created by the Initial Developer are Copyright (C) 2008
  67  * the Initial Developer. All Rights Reserved.
  68  *
  69  * Contributor(s):
  70  *   Bill St. Clair <bill@billstclair.com>
  71  *
  72  * Alternatively, the contents of this file may be used under the
  73  * terms of the GNU General Public License Version 2 or later (the
  74  * "GPL"), the GNU Lesser General Public License Version 2.1 or later
  75  * (the "LGPL"), or The Apache License Version 2.0 (the "AL"), in
  76  * which case the provisions of the GPL, LGPL, or AL are applicable
  77  * instead of those above. If you wish to allow use of your version of
  78  * this file only under the terms of the GPL, the LGPL, or the AL, and
  79  * not to allow others to use your version of this file under the
  80  * terms of the MPL, indicate your decision by deleting the provisions
  81  * above and replace them with the notice and other provisions
  82  * required by the GPL or the LGPL. If you do not delete the
  83  * provisions above, a recipient may use your version of this file
  84  * under the terms of any one of the MPL, the GPL the LGPL, or the AL.
  85  ****** END LICENSE BLOCK ***** */
  86 ?>