+<?php
+/***************************************************************************
+ * Copyright (C) 2003-2006 Polytechnique.org *
+ * http://opensource.polytechnique.org/ *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program 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 General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the Free Software *
+ * Foundation, Inc., *
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
+ ***************************************************************************/
+
+class Session
+{
+ function init()
+ {
+ @session_start();
+ if (empty($_SESSION['challenge'])) {
+ $_SESSION['challenge'] = sha1(uniqid(rand(), true));
+ }
+ }
+
+ function destroy()
+ {
+ @session_destroy();
+ unset($_SESSION);
+ }
+
+
+
+ function has($key)
+ {
+ return isset($_SESSION[$key]);
+ }
+
+ function kill($key)
+ {
+ unset($_SESSION[$key]);
+ }
+
+ function v($key, $default = null)
+ {
+ return isset($_SESSION[$key]) ? $_SESSION[$key] : $default;
+ }
+
+
+ function has_perms()
+ {
+ return Session::logged() && Session::v('perms') == PERMS_ADMIN;
+ }
+
+ function logged()
+ {
+ return Session::v('auth', AUTH_PUBLIC) >= AUTH_COOKIE;
+ }
+
+ function identified()
+ {
+ return Session::v('auth', AUTH_PUBLIC) >= AUTH_MDP;
+ }
+}
+
+class S extends Session { }
+
+?>