<?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_Security

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

 */

/**

 * Zend_InfoCard_Xml_Security_Transform_Interface

 */

require_once 'Zend/InfoCard/Xml/Security/Transform/Interface.php';

/**

 * A object implementing the EnvelopedSignature XML Transform

 *

 * @category   Zend

 * @package    Zend_InfoCard

 * @subpackage Zend_InfoCard_Xml_Security

 * @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_Security_Transform_EnvelopedSignature

    implements Zend_InfoCard_Xml_Security_Transform_Interface

{

    /**

     * Transforms the XML Document according to the EnvelopedSignature Transform

     *

     * @throws Zend_InfoCard_Xml_Security_Transform_Exception

     * @param string $strXMLData The input XML data

     * @return string the transformed XML data

     */

    public function transform($strXMLData)

    {

        $sxe = simplexml_load_string($strXMLData);

        if(!$sxe->Signature) {

            require_once 'Zend/InfoCard/Xml/Security/Transform/Exception.php';

            throw new Zend_InfoCard_Xml_Security_Transform_Exception("Unable to locate Signature Block for EnvelopedSignature Transform");

        }

        unset($sxe->Signature);

        return $sxe->asXML();

    }

}