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<?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: Transform.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/**
* A class to create a transform rule set based on XML URIs and then apply those rules
* in the correct order to a given XML input
*
* @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
{
/**
* A list of transforms to apply
*
* @var array
*/
protected $_transformList = array();
/**
* Returns the name of the transform class based on a given URI
*
* @throws Zend_InfoCard_Xml_Security_Exception
* @param string $uri The transform URI
* @return string The transform implementation class name
*/
protected function _findClassbyURI($uri)
{
switch($uri) {
case 'http://www.w3.org/2000/09/xmldsig#enveloped-signature':
return 'Zend_InfoCard_Xml_Security_Transform_EnvelopedSignature';
case 'http://www.w3.org/2001/10/xml-exc-c14n#':
return 'Zend_InfoCard_Xml_Security_Transform_XmlExcC14N';
default:
require_once 'Zend/InfoCard/Xml/Security/Exception.php';
throw new Zend_InfoCard_Xml_Security_Exception("Unknown or Unsupported Transformation Requested");
}
}
/**
* Add a Transform URI to the list of transforms to perform
*
* @param string $uri The Transform URI
* @return Zend_InfoCard_Xml_Security_Transform
*/
public function addTransform($uri)
{
$class = $this->_findClassbyURI($uri);
$this->_transformList[] = array('uri' => $uri,
'class' => $class);
return $this;
}
/**
* Return the list of transforms to perform
*
* @return array The list of transforms
*/
public function getTransformList()
{
return $this->_transformList;
}
/**
* Apply the transforms in the transform list to the input XML document
*
* @param string $strXmlDocument The input XML
* @return string The XML after the transformations have been applied
*/
public function applyTransforms($strXmlDocument)
{
foreach($this->_transformList as $transform) {
if (!class_exists($transform['class'])) {
require_once 'Zend/Loader.php';
Zend_Loader::loadClass($transform['class']);
}
$transformer = new $transform['class'];
// We can't really test this check because it would require logic changes in the component itself
// @codeCoverageIgnoreStart
if(!($transformer instanceof Zend_InfoCard_Xml_Security_Transform_Interface)) {
require_once 'Zend/InfoCard/Xml/Security/Exception.php';
throw new Zend_InfoCard_Xml_Security_Exception("Transforms must implement the Transform Interface");
}
// @codeCoverageIgnoreEnd
$strXmlDocument = $transformer->transform($strXmlDocument);
}
return $strXmlDocument;
}
}
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