<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

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

 * with this package in the file LICENSE.txt.

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

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

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

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

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

 *

 * @category   Zend

 * @package    Zend_InfoCard

 * @subpackage Zend_InfoCard_Cipher

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

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

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

 */

/**

 * Provides an abstraction for encryption ciphers used in an Information Card

 * implementation

 *

 * @category   Zend

 * @package    Zend_InfoCard

 * @subpackage Zend_InfoCard_Cipher

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

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

 */

class Zend_InfoCard_Cipher

{

    /**

     * AES 256 Encryption with CBC

     */

    const ENC_AES256CBC      = 'http://www.w3.org/2001/04/xmlenc#aes256-cbc';

    /**

     * AES 128 Encryption with CBC

     */

    const ENC_AES128CBC      = 'http://www.w3.org/2001/04/xmlenc#aes128-cbc';

    /**

     * RSA Public Key Encryption with OAEP Padding

     */

    const ENC_RSA_OAEP_MGF1P = 'http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p';

    /**

     * RSA Public Key Encryption with no padding

     */

    const ENC_RSA            = 'http://www.w3.org/2001/04/xmlenc#rsa-1_5';

    /**

     * Constructor (disabled)

     *

     * @return void

     * @codeCoverageIgnoreStart

     */

    protected function __construct()

    {

    }

    // @codeCoverageIgnoreEnd

    /**

     * Returns an instance of a cipher object supported based on the URI provided

     *

     * @throws Zend_InfoCard_Cipher_Exception

     * @param string $uri The URI of the encryption method wantde

     * @return mixed an Instance of Zend_InfoCard_Cipher_Symmetric_Interface or Zend_InfoCard_Cipher_Pki_Interface

     *               depending on URI

     */

    static public function getInstanceByURI($uri)

    {

        switch($uri) {

            case self::ENC_AES256CBC:

                include_once 'Zend/InfoCard/Cipher/Symmetric/Adapter/Aes256cbc.php';

                return new Zend_InfoCard_Cipher_Symmetric_Adapter_Aes256cbc();

            case self::ENC_AES128CBC:

                include_once 'Zend/InfoCard/Cipher/Symmetric/Adapter/Aes128cbc.php';

                return new Zend_InfoCard_Cipher_Symmetric_Adapter_Aes128cbc();

            case self::ENC_RSA_OAEP_MGF1P:

                include_once 'Zend/InfoCard/Cipher/Pki/Adapter/Rsa.php';

                return new Zend_InfoCard_Cipher_Pki_Adapter_Rsa(Zend_InfoCard_Cipher_Pki_Adapter_Rsa::OAEP_PADDING);

                break;

            case self::ENC_RSA:

                include_once 'Zend/InfoCard/Cipher/Pki/Adapter/Rsa.php';

                return new Zend_InfoCard_Cipher_Pki_Adapter_Rsa(Zend_InfoCard_Cipher_Pki_Adapter_Rsa::NO_PADDING);

                break;

            default:

                require_once 'Zend/InfoCard/Cipher/Exception.php';

                throw new Zend_InfoCard_Cipher_Exception("Unknown Cipher URI");

        }

    }

}