classes/session.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2007 Polytechnique.org                              *
   4  *  http://opensource.polytechnique.org/                                   *
   5  *                                                                         *
   6  *  This program is free software; you can redistribute it and/or modify   *
   7  *  it under the terms of the GNU General Public License as published by   *
   8  *  the Free Software Foundation; either version 2 of the License, or      *
   9  *  (at your option) any later version.                                    *
  10  *                                                                         *
  11  *  This program is distributed in the hope that it will be useful,        *
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  14  *  GNU General Public License for more details.                           *
  15  *                                                                         *
  16  *  You should have received a copy of the GNU General Public License      *
  17  *  along with this program; if not, write to the Free Software            *
  18  *  Foundation, Inc.,                                                      *
  19  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  20  ***************************************************************************/
  21
  22 class Session
  23 {
  24     public static function init()
  25     {
  26         @session_start();
  27         if (empty($_SESSION['challenge'])) {
  28             $_SESSION['challenge'] = sha1(uniqid(rand(), true));
  29        }
  30     }
  31
  32     public static function destroy()
  33     {
  34         @session_destroy();
  35         unset($_SESSION);
  36     }
  37
  38     public static function has($key)
  39     {
  40         return isset($_SESSION[$key]);
  41     }
  42
  43     public static function kill($key)
  44     {
  45         unset($_SESSION[$key]);
  46     }
  47
  48     public static function v($key, $default = null)
  49     {
  50         return isset($_SESSION[$key]) ? $_SESSION[$key] : $default;
  51     }
  52
  53     public static function i($key, $default = 0)
  54     {
  55         $i = Session::v($key, $default);
  56         return is_numeric($i) ? intval($i) : $default;
  57     }
  58
  59     public static function has_perms()
  60     {
  61         return Session::logged() && Session::v('perms') == PERMS_ADMIN;
  62     }
  63
  64     public static function logged()
  65     {
  66         return Session::v('auth', AUTH_PUBLIC) >= AUTH_COOKIE;
  67     }
  68
  69     public static function identified()
  70     {
  71         return Session::v('auth', AUTH_PUBLIC) >= AUTH_MDP;
  72     }
  73 }
  74
  75 // {{{ function check_perms()
  76
  77 /** verifie si un utilisateur a les droits pour voir une page
  78  ** si ce n'est pas le cas, on affiche une erreur
  79  * @return void
  80  */
  81 function check_perms()
  82 {
  83     global $page;
  84     if (!S::has_perms()) {
  85         if ($_SESSION['log']) {
  86             $_SESSION['log']->log("noperms",$_SERVER['PHP_SELF']);
  87         }
  88         $page->kill("Tu n'as pas les permissions nécessaires pour accéder à cette page.");
  89     }
  90 }
  91
  92 // }}}
  93
  94 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
  95 ?>