include/security.inc.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2010 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 $key=>$ip) {
  38             $v = ip_to_uint($ip);
  39             if (is_null($v)) {
  40                 unset($ips[$key]);
  41             } else {
  42                 $ips[$key] = '(ip & mask) = (' . $v . '& mask)';
  43             }
  44         }
  45         $res = XDB::query('SELECT  state, description
  46                              FROM  ip_watch
  47                             WHERE  ' . implode(' OR ', $ips) . '
  48                          ORDER BY  state DESC');
  49         if ($res->numRows()) {
  50             $state = $res->fetchOneAssoc();
  51             $_SESSION['check_ip'] = $state['state'];
  52             $_SESSION['check_ip_desc'] = $state['description'];
  53         } else {
  54             $_SESSION['check_ip'] = 'safe';
  55         }
  56     }
  57     $test = array();
  58     switch ($level) {
  59       case 'unsafe': $test[] = 'unsafe';
  60       case 'dangerous': $test[] = 'dangerous';
  61       case 'ban': $test[] = 'ban'; break;
  62       default: return false;
  63     }
  64     return in_array($_SESSION['check_ip'], $test);
  65 }
  66
  67 function check_email($email, $message)
  68 {
  69     $res = XDB::query("SELECT state, description
  70         FROM email_watch
  71         WHERE state != 'safe' AND email = {?}", $email);
  72     if ($res->numRows()) {
  73         send_warning_mail($message);
  74         return true;
  75     }
  76     return false;
  77 }
  78
  79 function check_account()
  80 {
  81     if (S::user()) {
  82         return S::user()->watch;
  83     }
  84     return false;
  85 }
  86
  87 function check_redirect($red = null)
  88 {
  89     require_once 'emails.inc.php';
  90     if (is_null($red)) {
  91         $user = S::user();
  92         $red = new Redirect($user);
  93     }
  94     if ($red->get_uid() == S::v('uid')) {
  95         $_SESSION['no_redirect'] = !$red->other_active('');
  96         $_SESSION['mx_failures'] = $red->get_broken_mx();
  97     }
  98 }
  99
 100 function send_warning_mail($title)
 101 {
 102     global $globals;
 103     $mailer = new PlMailer();
 104     $mailer->setFrom("webmaster@" . $globals->mail->domain);
 105     $mailer->addTo($globals->core->admin_email);
 106     $mailer->setSubject("[Plat/al Security Alert] $title");
 107     $mailer->setTxtBody("Identifiants de session :\n" . var_export($_SESSION, true) . "\n\n"
 108         ."Identifiants de connexion :\n" . var_export($_SERVER, true));
 109     $mailer->send();
 110 }
 111
 112 function kill_sessions()
 113 {
 114     assert(S::admin());
 115     shell_exec('sudo -u root ' . dirname(dirname(__FILE__)) . '/bin/kill_sessions.sh');
 116 }
 117
 118 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 119 ?>