--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/InfoCard/Xml/Security/Transform.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,116 @@
+<?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;
+    }
+}