--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/InfoCard/Cipher/Pki/Adapter/Rsa.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,120 @@
+<?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_Cipher
+ * @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: Rsa.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * Zend_InfoCard_Cipher_Pki_Adapter_Abstract
+ */
+require_once 'Zend/InfoCard/Cipher/Pki/Adapter/Abstract.php';
+
+/**
+ * Zend_InfoCard_Cipher_Pki_Rsa_Interface
+ */
+require_once 'Zend/InfoCard/Cipher/Pki/Rsa/Interface.php';
+
+/**
+ * RSA Public Key Encryption Cipher Object for the InfoCard component. Relies on OpenSSL
+ * to implement the RSA algorithm
+ *
+ * @category   Zend
+ * @package    Zend_InfoCard
+ * @subpackage Zend_InfoCard_Cipher
+ * @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_Cipher_Pki_Adapter_Rsa
+    extends Zend_InfoCard_Cipher_Pki_Adapter_Abstract
+    implements Zend_InfoCard_Cipher_Pki_Rsa_Interface
+{
+
+    /**
+     * Object Constructor
+     *
+     * @param integer $padding The type of Padding to use
+     */
+    public function __construct($padding = Zend_InfoCard_Cipher_Pki_Adapter_Abstract::NO_PADDING)
+    {
+        // Can't test this..
+        // @codeCoverageIgnoreStart
+        if(!extension_loaded('openssl')) {
+            require_once 'Zend/InfoCard/Cipher/Exception.php';
+            throw new Zend_InfoCard_Cipher_Exception("Use of this PKI RSA Adapter requires the openssl extension loaded");
+        }
+        // @codeCoverageIgnoreEnd
+
+        $this->setPadding($padding);
+    }
+
+    /**
+     * Decrypts RSA encrypted data using the given private key
+     *
+     * @throws Zend_InfoCard_Cipher_Exception
+     * @param string $encryptedData The encrypted data in binary format
+     * @param string $privateKey The private key in binary format
+     * @param string $password The private key passphrase
+     * @param integer $padding The padding to use during decryption (of not provided object value will be used)
+     * @return string The decrypted data
+     */
+    public function decrypt($encryptedData, $privateKey, $password = null, $padding = null)
+    {
+        $private_key = openssl_pkey_get_private(array($privateKey, $password));
+
+        if(!$private_key) {
+            require_once 'Zend/InfoCard/Cipher/Exception.php';
+            throw new Zend_InfoCard_Cipher_Exception("Failed to load private key");
+        }
+
+        if($padding !== null) {
+            try {
+                $this->setPadding($padding);
+            } catch(Exception $e) {
+                openssl_free_key($private_key);
+                throw $e;
+            }
+        }
+
+        switch($this->getPadding()) {
+            case self::NO_PADDING:
+                $openssl_padding = OPENSSL_NO_PADDING;
+                break;
+            case self::OAEP_PADDING:
+                $openssl_padding = OPENSSL_PKCS1_OAEP_PADDING;
+                break;
+        }
+
+        $result = openssl_private_decrypt($encryptedData, $decryptedData, $private_key, $openssl_padding);
+
+        openssl_free_key($private_key);
+
+        if(!$result) {
+            require_once 'Zend/InfoCard/Cipher/Exception.php';
+            throw new Zend_InfoCard_Cipher_Exception("Unable to Decrypt Value using provided private key");
+        }
+
+        if($this->getPadding() == self::NO_PADDING) {
+            $decryptedData = substr($decryptedData, 2);
+            $start = strpos($decryptedData, 0) + 1;
+            $decryptedData = substr($decryptedData, $start);
+        }
+
+        return $decryptedData;
+    }
+}