<?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_Xml

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

 */

/**

 * Zend_InfoCard_Xml_EncryptedData/Abstract.php

 */

require_once 'Zend/InfoCard/Xml/EncryptedData/Abstract.php';

/**

 * An XmlEnc formatted EncryptedData XML block

 *

 * @category   Zend

 * @package    Zend_InfoCard

 * @subpackage Zend_InfoCard_Xml

 * @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_Xml_EncryptedData_XmlEnc extends Zend_InfoCard_Xml_EncryptedData_Abstract

{

    /**

     * Returns the Encrypted CipherValue block from the EncryptedData XML document

     *

     * @throws Zend_InfoCard_Xml_Exception

     * @return string The value of the CipherValue block base64 encoded

     */

    public function getCipherValue()

    {

        $this->registerXPathNamespace('enc', 'http://www.w3.org/2001/04/xmlenc#');

        list(,$cipherdata) = $this->xpath("//enc:CipherData");

        if(!($cipherdata instanceof Zend_InfoCard_Xml_Element)) {

            throw new Zend_InfoCard_Xml_Exception("Unable to find the enc:CipherData block");

        }

        list(,$ciphervalue) = $cipherdata->xpath("//enc:CipherValue");

        if(!($ciphervalue instanceof Zend_InfoCard_Xml_Element)) {

            throw new Zend_InfoCard_Xml_Exception("Unable to fidn the enc:CipherValue block");

        }

        return (string)$ciphervalue;

    }

}