include/security.inc.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2008 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 /******************************************************************************
  23  * Security functions
  24  *****************************************************************************/
  25
  26 function check_ip($level)
  27 {
  28     if (empty($_SERVER['REMOTE_ADDR'])) {
  29         return false;
  30     }
  31     if (empty($_SESSION['check_ip'])) {
  32         $ips = array();
  33         if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
  34             $ips = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
  35         }
  36         $ips[] = $_SERVER['REMOTE_ADDR'];
  37         foreach ($ips as &$ip) {
  38             $ip = '(ip & mask) = (' . ip_to_uint($ip) . '& mask)';
  39         }
  40         $res = XDB::query('SELECT  state, description
  41                              FROM  ip_watch
  42                             WHERE  ' . implode(' OR ', $ips) . '
  43                          ORDER BY  state DESC');
  44         if ($res->numRows()) {
  45             $state = $res->fetchOneAssoc();
  46             $_SESSION['check_ip'] = $state['state'];
  47             $_SESSION['check_ip_desc'] = $state['description'];
  48         } else {
  49             $_SESSION['check_ip'] = 'safe';
  50         }
  51     }
  52     $test = array();
  53     switch ($level) {
  54       case 'unsafe': $test[] = 'unsafe';
  55       case 'dangerous': $test[] = 'dangerous';
  56       case 'ban': $test[] = 'ban'; break;
  57       default: return false;
  58     }
  59     return in_array($_SESSION['check_ip'], $test);
  60 }
  61
  62 function check_email($email, $message)
  63 {
  64     $res = XDB::query("SELECT state, description
  65         FROM emails_watch
  66         WHERE state != 'safe' AND email = {?}", $email);
  67     if ($res->numRows()) {
  68         send_warning_mail($message);
  69         return true;
  70     }
  71     return false;
  72 }
  73
  74 function check_account()
  75 {
  76     return S::v('watch_account');
  77 }
  78
  79 function check_redirect($red = null)
  80 {
  81     require_once 'emails.inc.php';
  82     if (is_null($red)) {
  83         $red = new Redirect(S::v('uid'));
  84     }
  85     if ($red->get_uid() == S::v('uid')) {
  86         $_SESSION['no_redirect'] = !$red->other_active('');
  87         $_SESSION['mx_failures'] = $red->get_broken_mx();
  88     }
  89 }
  90
  91 function send_warning_mail($title)
  92 {
  93     global $globals;
  94     $mailer = new PlMailer();
  95     $mailer->setFrom("webmaster@" . $globals->mail->domain);
  96     $mailer->addTo($globals->core->admin_email);
  97     $mailer->setSubject("[Plat/al Security Alert] $title");
  98     $mailer->setTxtBody("Identifiants de session :\n" . var_export($_SESSION, true) . "\n\n"
  99         ."Identifiants de connexion :\n" . var_export($_SERVER, true));
 100     $mailer->send();
 101 }
 102
 103 function kill_sessions()
 104 {
 105     assert(S::has_perms());
 106     shell_exec('sudo -u root ' . dirname(dirname(__FILE__)) . '/bin/kill_sessions.sh');
 107 }
 108
 109 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 110 ?>