File indexing completed on 2024-12-22 05:36:23

 <?php
 
 /**
  *  ocs-webserver
  *
  *  Copyright 2016 by pling GmbH.
  *
  *    This file is part of ocs-webserver.
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU Affero General Public License as
  *    published by the Free Software Foundation, either version 3 of the
  *    License, or (at your option) any later version.
  *
  *    This program is distributed in the hope that it will be useful,
  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *    GNU Affero General Public License for more details.
  *
  *    You should have received a copy of the GNU Affero General Public License
  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  **/
 class Local_Filter_Url_Decrypt implements Zend_Filter_Interface
 {
 
     /**
      * Returns the result of filtering $value
      *
      * @param  mixed $value
      *
      * @return mixed
      */
     public function filter($value)
     {
         return $this->decryptUrl($value);
     }
 
     /**
      * @param string $url
      *
      * @return string
      */
     protected function decryptUrl($url)
     {
         if (empty($url)) {
             return '';
         }
 
         /*  Set various encryption options. */
         $options = array(
             // Encryption type - Openssl or Mcrypt
             'adapter'   => 'mcrypt',
             // Initialization vector
             'vector'    => '236587hgtyujkirtfgty5678',
             // Encryption algorithm
             'algorithm' => 'rijndael-192',
             // Encryption key
             'key'       => 'KFJGKDK$$##^FFS345678FG2'
         );
 
         /* Initialize the library and pass the options */
         $filter = new Zend_Filter_Decrypt($options);
 
         return rtrim($filter->filter($this->base64url_decode($url)));
     }
 
     /**
      * @param string $data
      *
      * @return bool|string
      */
     protected function base64url_decode($data)
     {
         return base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT));
     }
 
 }