<?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: XmlExcC14N.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 Transform to perform C14n XML Exclusive Canonicalization

 *

 * @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_XmlExcC14N

    implements Zend_InfoCard_Xml_Security_Transform_Interface

{

    /**

     * Transform the input XML based on C14n XML Exclusive Canonicalization rules

     *

     * @throws Zend_InfoCard_Xml_Security_Transform_Exception

     * @param string $strXMLData The input XML

     * @return string The output XML

     */

    public function transform($strXMLData)

    {

        $dom = new DOMDocument();

        $dom->loadXML($strXMLData);

        if(method_exists($dom, 'C14N')) {

            return $dom->C14N(true, false);

        }

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

        throw new Zend_InfoCard_Xml_Security_Transform_Exception("This transform requires the C14N() method to exist in the DOM extension");

    }

}