1 <?php

     2 /**

     3  * Zend Framework

     4  *

     5  * LICENSE

     6  *

     7  * This source file is subject to the new BSD license that is bundled

     8  * with this package in the file LICENSE.txt.

     9  * It is also available through the world-wide-web at this URL:

    10  * http://framework.zend.com/license/new-bsd

    11  * If you did not receive a copy of the license and are unable to

    12  * obtain it through the world-wide-web, please send an email

    13  * to license@zend.com so we can send you a copy immediately.

    14  *

    15  * @category   Zend

    16  * @package    Zend_Filter

    17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    18  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    19  * @version    $Id: Encrypt.php 20096 2010-01-06 02:05:09Z bkarwin $

    20  */

    21 

    22 /**

    23  * @see Zend_Filter_Interface

    24  */

    25 require_once 'Zend/Filter/Interface.php';

    26 

    27 /**

    28  * @see Zend_Loader

    29  */

    30 require_once 'Zend/Loader.php';

    31 

    32 /**

    33  * Encrypts a given string

    34  *

    35  * @category   Zend

    36  * @package    Zend_Filter

    37  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    38  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    39  */

    40 class Zend_Filter_Encrypt implements Zend_Filter_Interface

    41 {

    42     /**

    43      * Encryption adapter

    44      */

    45     protected $_adapter;

    46 

    47     /**

    48      * Class constructor

    49      *

    50      * @param string|array $options (Optional) Options to set, if null mcrypt is used

    51      */

    52     public function __construct($options = null)

    53     {

    54         if ($options instanceof Zend_Config) {

    55             $options = $options->toArray();

    56         }

    57 

    58         $this->setAdapter($options);

    59     }

    60 

    61     /**

    62      * Returns the name of the set adapter

    63      *

    64      * @return string

    65      */

    66     public function getAdapter()

    67     {

    68         return $this->_adapter->toString();

    69     }

    70 

    71     /**

    72      * Sets new encryption options

    73      *

    74      * @param  string|array $options (Optional) Encryption options

    75      * @return Zend_Filter_Encrypt

    76      */

    77     public function setAdapter($options = null)

    78     {

    79         if (is_string($options)) {

    80             $adapter = $options;

    81         } else if (isset($options['adapter'])) {

    82             $adapter = $options['adapter'];

    83             unset($options['adapter']);

    84         } else {

    85             $adapter = 'Mcrypt';

    86         }

    87 

    88         if (!is_array($options)) {

    89             $options = array();

    90         }

    91 

    92         if (Zend_Loader::isReadable('Zend/Filter/Encrypt/' . ucfirst($adapter). '.php')) {

    93             $adapter = 'Zend_Filter_Encrypt_' . ucfirst($adapter);

    94         }

    95 

    96         if (!class_exists($adapter)) {

    97             Zend_Loader::loadClass($adapter);

    98         }

    99 

   100         $this->_adapter = new $adapter($options);

   101         if (!$this->_adapter instanceof Zend_Filter_Encrypt_Interface) {

   102             require_once 'Zend/Filter/Exception.php';

   103             throw new Zend_Filter_Exception("Encoding adapter '" . $adapter . "' does not implement Zend_Filter_Encrypt_Interface");

   104         }

   105 

   106         return $this;

   107     }

   108 

   109     /**

   110      * Calls adapter methods

   111      *

   112      * @param string       $method  Method to call

   113      * @param string|array $options Options for this method

   114      */

   115     public function __call($method, $options)

   116     {

   117         $part = substr($method, 0, 3);

   118         if ((($part != 'get') and ($part != 'set')) or !method_exists($this->_adapter, $method)) {

   119             require_once 'Zend/Filter/Exception.php';

   120             throw new Zend_Filter_Exception("Unknown method '{$method}'");

   121         }

   122 

   123         return call_user_func_array(array($this->_adapter, $method), $options);

   124     }

   125 

   126     /**

   127      * Defined by Zend_Filter_Interface

   128      *

   129      * Encrypts the content $value with the defined settings

   130      *

   131      * @param  string $value Content to encrypt

   132      * @return string The encrypted content

   133      */

   134     public function filter($value)

   135     {

   136         return $this->_adapter->encrypt($value);

   137     }

   138 }