--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/InfoCard/Xml/EncryptedData/Abstract.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,92 @@
+<?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: Abstract.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * Zend_InfoCard_Xml_Element
+ */
+require_once 'Zend/InfoCard/Xml/Element.php';
+
+/**
+ * Zend_InfoCard_Xml_KeyInfo
+ */
+require_once 'Zend/InfoCard/Xml/KeyInfo.php';
+
+/**
+ * An abstract class representing a generic EncryptedData XML block. This class is extended
+ * into a specific type of EncryptedData XML block (i.e. XmlEnc) as necessary
+ *
+ * @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
+ */
+abstract class Zend_InfoCard_Xml_EncryptedData_Abstract extends Zend_InfoCard_Xml_Element
+{
+
+    /**
+     * Returns the KeyInfo Block
+     *
+     * @return Zend_InfoCard_Xml_KeyInfo_Abstract
+     */
+    public function getKeyInfo()
+    {
+        return Zend_InfoCard_Xml_KeyInfo::getInstance($this->KeyInfo[0]);
+    }
+
+    /**
+     * Return the Encryption method used to encrypt the assertion document
+     * (the symmetric cipher)
+     *
+     * @throws Zend_InfoCard_Xml_Exception
+     * @return string The URI of the Symmetric Encryption Method used
+     */
+    public function getEncryptionMethod()
+    {
+
+        /**
+         * @todo This is pretty hacky unless we can always be confident that the first
+         * EncryptionMethod block is the correct one (the AES or compariable symetric algorithm)..
+         * the second is the PK method if provided.
+         */
+        list($encryption_method) = $this->xpath("//enc:EncryptionMethod");
+
+        if(!($encryption_method instanceof Zend_InfoCard_Xml_Element)) {
+            throw new Zend_InfoCard_Xml_Exception("Unable to find the enc:EncryptionMethod symmetric encryption block");
+        }
+
+        $dom = self::convertToDOM($encryption_method);
+
+        if(!$dom->hasAttribute('Algorithm')) {
+            throw new Zend_InfoCard_Xml_Exception("Unable to determine the encryption algorithm in the Symmetric enc:EncryptionMethod XML block");
+        }
+
+        return $dom->getAttribute('Algorithm');
+    }
+
+    /**
+     * Returns the value of the encrypted block
+     *
+     * @return string the value of the encrypted CipherValue block
+     */
+    abstract function getCipherValue();
+}