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   1  <?php
   2  /**
   3   * Copyright 2005-2008 Matthew Fonda <mfonda@php.net>
   4   * Copyright 2008 Philippe Jausions <jausions@php.net>
   5   * Copyright 2012-2014 Horde LLC (http://www.horde.org/)
   6   *
   7   * See the enclosed file COPYING for license information (LGPL). If you
   8   * did not receive this file, see http://www.horde.org/licenses/lgpl21.
   9   *
  10   * @category  Horde
  11   * @copyright 2005-2008 Matthew Fonda
  12   * @copyright 2012-2014 Horde LLC
  13   * @license   http://www.horde.org/licenses/lgpl21 LGPL 2.1
  14   * @package   Crypt_Blowfish
  15   */
  16  
  17  /**
  18   * Mcrypt driver for blowfish encryption.
  19   *
  20   * @author    Matthew Fonda <mfonda@php.net>
  21   * @author    Philippe Jausions <jausions@php.net>
  22   * @author    Michael Slusarz <slusarz@horde.org>
  23   * @category  Horde
  24   * @copyright 2005-2008 Matthew Fonda
  25   * @copyright 2012-2014 Horde LLC
  26   * @license   http://www.horde.org/licenses/lgpl21 LGPL 2.1
  27   * @package   Crypt_Blowfish
  28   */
  29  class Horde_Crypt_Blowfish_Mcrypt extends Horde_Crypt_Blowfish_Base
  30  {
  31      /**
  32       * Mcrypt resource.
  33       *
  34       * @var resource
  35       */
  36      private $_mcrypt;
  37  
  38      /**
  39       */
  40      static public function supported()
  41      {
  42          return extension_loaded('mcrypt');
  43      }
  44  
  45      /**
  46       */
  47      public function __construct($cipher)
  48      {
  49          parent::__construct($cipher);
  50  
  51          $this->_mcrypt = mcrypt_module_open(MCRYPT_BLOWFISH, '', $cipher, '');
  52      }
  53  
  54      /**
  55       */
  56      public function encrypt($text)
  57      {
  58          mcrypt_generic_init($this->_mcrypt, $this->key, empty($this->iv) ? str_repeat('0', Horde_Crypt_Blowfish::IV_LENGTH) : $this->iv);
  59          $out = mcrypt_generic($this->_mcrypt, $this->_pad($text));
  60          mcrypt_generic_deinit($this->_mcrypt);
  61  
  62          return $out;
  63      }
  64  
  65      /**
  66       */
  67      public function decrypt($text)
  68      {
  69          mcrypt_generic_init($this->_mcrypt, $this->key, empty($this->iv) ? str_repeat('0', Horde_Crypt_Blowfish::IV_LENGTH) : $this->iv);
  70          $out = mdecrypt_generic($this->_mcrypt, $this->_pad($text, true));
  71          mcrypt_generic_deinit($this->_mcrypt);
  72  
  73          return $this->_unpad($out);
  74      }
  75  
  76      /**
  77       */
  78      public function setIv($iv = null)
  79      {
  80          $this->iv = is_null($iv)
  81              ? mcrypt_create_iv(Horde_Crypt_Blowfish::IV_LENGTH, MCRYPT_RAND)
  82              : $iv;
  83      }
  84  
  85  }