diff -r 000000000000 -r 4eba9c11703f web/Zend/Oauth/Signature/Rsa.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Oauth/Signature/Rsa.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,65 @@
+<?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_Oauth
+ * @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 20217 2010-01-12 16:01:57Z matthew $
+ */
+
+/** Zend_Oauth_Signature_SignatureAbstract */
+require_once 'Zend/Oauth/Signature/SignatureAbstract.php';
+
+/** Zend_Crypt_Rsa */
+require_once 'Zend/Crypt/Rsa.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Oauth
+ * @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_Oauth_Signature_Rsa extends Zend_Oauth_Signature_SignatureAbstract
+{
+    /**
+     * Sign a request
+     * 
+     * @param  array $params 
+     * @param  null|string $method 
+     * @param  null|string $url 
+     * @return string
+     */
+    public function sign(array $params, $method = null, $url = null) 
+    {
+        $rsa = new Zend_Crypt_Rsa;
+        $rsa->setHashAlgorithm($this->_hashAlgorithm);
+        $sign = $rsa->sign(
+            $this->_getBaseSignatureString($params, $method, $url),
+            $this->_key,
+            Zend_Crypt_Rsa::BASE64
+        );
+        return $sign;
+    }
+
+    /**
+     * Assemble encryption key
+     * 
+     * @return string
+     */
+    protected function _assembleKey()
+    {
+        return $this->_consumerSecret;
+    }
+}