diff --git a/src/Pluf/Middleware/Csrf.php b/src/Pluf/Middleware/Csrf.php
new file mode 100644
index 0000000..a898d42
--- /dev/null
+++ b/src/Pluf/Middleware/Csrf.php
@@ -0,0 +1,121 @@
+<?php
+/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+# ***** BEGIN LICENSE BLOCK *****
+# This file is part of Plume Framework, a simple PHP Application Framework.
+# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
+#
+# Plume Framework is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Plume Framework is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# ***** END LICENSE BLOCK ***** */
+
+/**
+ * Cross Site Request Forgery Middleware.
+ *
+ * This class provides a middleware that implements protection against
+ * request forgeries from other sites. This middleware must be before
+ * the Pluf_Middleware_Session middleware.
+ *
+ * Based on concepts from the Django CSRF middleware.
+ */
+class Pluf_Middleware_Csrf
+{
+    public static function makeToken($session_key)
+    {
+        return md5(Pluf::f('secret_key').$session_key);
+    }
+
+    /**
+     * Process the request.
+     *
+     * When processing the request, if a POST request with a session,
+     * we will check that the token is available and valid.
+     *
+     * @param Pluf_HTTP_Request The request
+     * @return bool false
+     */
+    function process_request(&$request)
+    {
+        if ($request->method != 'POST') {
+            return false;
+        }
+        $cookie_name = Pluf::f('session_cookie_id', 'sessionid');
+        if (!isset($request->COOKIE[$cookie_name])) {
+            // no session, nothing to do
+            return false;
+        }
+        try {
+            $data = Pluf_Middleware_Session::_decodeData($request->COOKIE[$cookie_name]);
+        } catch (Exception $e) {
+            // no valid session
+            return false;
+        }
+        if (!isset($data['Pluf_Session_key'])) {
+            // no session key
+            return false;
+        }
+        $token = self::makeToken($data['Pluf_Session_key']);
+        if (!isset($request->POST['csrfmiddlewaretoken'])) {
+            return new Pluf_HTTP_Response_Forbidden($request);
+        }
+        if ($request->POST['csrfmiddlewaretoken'] != $token) {
+            return new Pluf_HTTP_Response_Forbidden($request);
+        }
+        return false;
+    }
+
+    /**
+     * Process the response of a view.
+     *
+     * If we find a POST form, add the token to it.
+     *
+     * @param Pluf_HTTP_Request The request
+     * @param Pluf_HTTP_Response The response
+     * @return Pluf_HTTP_Response The response
+     */
+    function process_response($request, $response)
+    {
+        $cookie_name = Pluf::f('session_cookie_id', 'sessionid');
+        if (!isset($request->COOKIE[$cookie_name])) {
+            // no session, nothing to do
+            return $response;
+        }
+        try {
+            $data = Pluf_Middleware_Session::_decodeData($request->COOKIE[$cookie_name]);
+        } catch (Exception $e) {
+            // no valid session
+            return $response;
+        }
+        if (!isset($data['Pluf_Session_key'])) {
+            // no session key
+            return $response;
+        }
+        $ok = false;
+        $cts = array('text/html', 'application/xhtml+xml');
+        foreach ($cts as $ct) {
+            if (false !== strripos($response->headers['Content-Type'], $ct)) {
+                $ok = true;
+                break;
+            }
+        }
+        if (!$ok) {
+            return $response;
+        }
+        $token = self::makeToken($data['Pluf_Session_key']);
+        $extra = '<div style="display:none;"><input type="hidden" name="csrfmiddlewaretoken" value="'.$token.'" /></div>';
+        $response->content = preg_replace('/(<form\W[^>]*\bmethod=(\'|"|)POST(\'|"|)\b[^>]*>)/i', '$1'.$extra, $response->content);
+        return $response;
+    }
+}
\ No newline at end of file