classes/xorgsession.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 class XorgSession extends PlSession
  23 {
  24     public function __construct()
  25     {
  26         parent::__construct();
  27     }
  28
  29     public function startAvailableAuth()
  30     {
  31         if (!S::logged()) {
  32             $cookie = $this->tryCookie();
  33             if ($cookie == 0) {
  34                 return $this->start(AUTH_COOKIE);
  35             } else if ($cookie == 1 || $cookie == -2) {
  36                 return false;
  37             }
  38         }
  39         if ((check_ip('dangerous') && S::has('uid')) || check_account()) {
  40             S::logger()->log("view_page", $_SERVER['REQUEST_URI']);
  41         }
  42         return true;
  43     }
  44
  45     /** Check the cookie and set the associated user_id in the auth_by_cookie session variable.
  46      */
  47     private function tryCookie()
  48     {
  49         S::kill('auth_by_cookie');
  50         if (Cookie::v('access') == '' || !Cookie::has('uid')) {
  51             return -1;
  52         }
  53
  54         $res = XDB::query('SELECT  uid, password
  55                              FROM  accounts
  56                             WHERE  uid = {?} AND state = \'active\'',
  57                          Cookie::i('uid'));
  58         if ($res->numRows() != 0) {
  59             list($uid, $password) = $res->fetchOneRow();
  60             $expected_value = sha1($password);
  61             if ($expected_value == Cookie::v('access')) {
  62                 S::set('auth_by_cookie', $uid);
  63                 return 0;
  64             } else {
  65                 return 1;
  66             }
  67         }
  68         return -2;
  69     }
  70
  71     private function checkPassword($uname, $login, $response, $login_type)
  72     {
  73         $res = XDB::query('SELECT  a.uid, a.password
  74                              FROM  accounts AS a
  75                        INNER JOIN  aliases  AS l ON (l.id = a.uid AND l.type != \'homonyme\')
  76                             WHERE  l.' . $login_type . ' = {?} AND a.state = \'active\'',
  77                           $login);
  78         if (list($uid, $password) = $res->fetchOneRow()) {
  79             $expected_response = sha1("$uname:$password:" . S::v('challenge'));
  80             /* XXX: Deprecates len(password) > 10 conversion */
  81             if ($response != $expected_response) {
  82                 if (!S::logged()) {
  83                     Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
  84                 } else {
  85                     Platal::page()->trigError('Mot de passe invalide');
  86                 }
  87                 S::logger($uid)->log('auth_fail', 'bad password');
  88                 return null;
  89             }
  90             return $uid;
  91         }
  92         return null;
  93     }
  94
  95
  96     /** Check auth.
  97      */
  98     protected function doAuth($level)
  99     {
 100         global $globals;
 101
 102         /* Cookie authentication
 103          */
 104         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 105             $this->tryCookie();
 106         }
 107         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 108             if (!S::logged()) {
 109                 S::set('auth', AUTH_COOKIE);
 110             }
 111             return User::getSilentWithValues(null, array('user_id' => S::i('auth_by_cookie')));
 112         }
 113
 114
 115         /* We want to do auth... we must have infos from a form.
 116          */
 117         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 118             return null;
 119         }
 120
 121         /** We come from an authentication form.
 122          */
 123         if (S::suid()) {
 124             $login = $uname = S::suid('uid');
 125             $redirect = false;
 126         } else {
 127             $uname = Env::v('username');
 128             if (Env::v('domain') == "alias") {
 129                 $res = XDB::query('SELECT  redirect
 130                                      FROM  virtual
 131                                INNER JOIN  virtual_redirect USING(vid)
 132                                     WHERE  alias LIKE {?}',
 133                                    $uname . '@' . $globals->mail->alias_dom);
 134                 $redirect = $res->fetchOneCell();
 135                 if ($redirect) {
 136                     $login = substr($redirect, 0, strpos($redirect, '@'));
 137                 } else {
 138                     $login = '';
 139                 }
 140             } else {
 141                 $login = $uname;
 142                 $redirect = false;
 143             }
 144         }
 145
 146         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && is_numeric($uname)) ? 'id' : 'alias');
 147         if (!is_null($uid) && S::suid()) {
 148             if (S::suid('uid') == $uid) {
 149                 $uid = S::i('uid');
 150             } else {
 151                 $uid = null;
 152             }
 153         }
 154         if (!is_null($uid)) {
 155             S::set('auth', AUTH_MDP);
 156             if (!S::suid()) {
 157                 if (Post::has('domain')) {
 158                     if (($domain = Post::v('domain', 'login')) == 'alias') {
 159                         Cookie::set('domain', 'alias', 300);
 160                     } else {
 161                         Cookie::kill('domain');
 162                     }
 163                 }
 164             }
 165             S::kill('challenge');
 166             S::logger($uid)->log('auth_ok');
 167         }
 168         return User::getSilentWithValues(null, array('user_id' => $uid));
 169     }
 170
 171     protected function startSessionAs($user, $level)
 172     {
 173         if ((!is_null(S::v('user')) && S::v('user')->id() != $user->id())
 174             || (S::has('uid') && S::i('uid') != $user->id())) {
 175             return false;
 176         } else if (S::has('uid')) {
 177             return true;
 178         }
 179         if ($level == AUTH_SUID) {
 180             S::set('auth', AUTH_MDP);
 181         }
 182
 183         // Retrieves main user properties.
 184         /** TODO: Move needed informations to account tables */
 185         /** TODO: Currently suppressed data are matricule, promo */
 186         /** TODO: Data to move are: banana_last, watch_last, last_version */
 187         /** TODO: Use the User object to fetch all this */
 188         $res  = XDB::query("SELECT  a.uid, a.hruid, a.display_name, a.full_name, a.password,
 189                                     a.sex = 'female' AS femme, a.email_format,
 190                                     a.token, FIND_IN_SET('watch', a.flags) AS watch_account,
 191                                     UNIX_TIMESTAMP(q.banana_last) AS banana_last, q.watch_last,
 192                                     q.last_version, g.g_account_name IS NOT NULL AS googleapps,
 193                                     UNIX_TIMESTAMP(s.start) AS lastlogin, s.host,
 194                                     a.is_admin, at.perms
 195                               FROM  accounts        AS a
 196                         INNER JOIN  account_types   AS at ON(a.type = at.type)
 197                         INNER JOIN  auth_user_quick AS q  ON(a.uid = q.user_id)
 198                          LEFT JOIN  gapps_accounts  AS g  ON(a.uid = g.l_userid AND g.g_status = 'active')
 199                          LEFT JOIN  logger.last_sessions AS ls ON (ls.uid = a.uid)
 200                          LEFT JOIN  logger.sessions AS s  ON(s.id = ls.id)
 201                              WHERE  a.uid = {?} AND a.state = 'active'", $user->id());
 202         $sess = $res->fetchOneAssoc();
 203         $perms = $sess['perms'];
 204         unset($sess['perms']);
 205
 206         // Loads the data into the real session.
 207         $_SESSION = array_merge($_SESSION, $sess);
 208
 209         // Starts the session's logger, and sets up the permanent cookie.
 210         if (S::suid()) {
 211             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 212         } else {
 213             S::logger()->saveLastSession();
 214             Cookie::set('uid', $user->id(), 300);
 215
 216             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 217                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 218             } else {
 219                 $this->killAccessCookie();
 220             }
 221         }
 222
 223         // Finalizes the session setup.
 224         $this->makePerms($perms, S::b('is_admin'));
 225         $this->securityChecks();
 226         $this->setSkin();
 227         $this->updateNbNotifs();
 228         check_redirect();
 229
 230         // We should not have to use this private data anymore
 231         S::kill('auth_by_cookie');
 232         return true;
 233     }
 234
 235     private function securityChecks()
 236     {
 237         $mail_subject = array();
 238         if (check_account()) {
 239             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 240         }
 241         if (check_ip('unsafe')) {
 242             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 243             if (check_ip('ban')) {
 244                 send_warning_mail(implode(' - ', $mail_subject));
 245                 $this->destroy();
 246                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 247                                     . 'Merci de contacter au plus vite '
 248                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 249                 return false;
 250             }
 251         }
 252         if (count($mail_subject)) {
 253             send_warning_mail(implode(' - ', $mail_subject));
 254         }
 255     }
 256
 257     public function tokenAuth($login, $token)
 258     {
 259         $res = XDB::query('SELECT  a.hruid
 260                              FROM  aliases  AS l
 261                        INNER JOIN  accounts AS a ON (l.id = a.uid AND a.state = \'active\')
 262                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 263                            $token, $login);
 264         if ($res->numRows() == 1) {
 265             $data = $res->fetchOneAssoc();
 266             return new User($data['hruid'], $data);
 267         }
 268         return null;
 269     }
 270
 271     protected function makePerms($perm, $is_admin)
 272     {
 273         S::set('perms', User::makePerms($perm, $is_admin));
 274     }
 275
 276     public function setSkin()
 277     {
 278         if (S::logged() && (!S::has('skin') || S::suid())) {
 279             $uid = S::v('uid');
 280             $res = XDB::query('SELECT  skin_tpl
 281                                  FROM  accounts AS a
 282                            INNER JOIN  skins    AS s on (a.skin = s.id)
 283                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 284             S::set('skin', $res->fetchOneCell());
 285         }
 286     }
 287
 288     public function loggedLevel()
 289     {
 290         return AUTH_COOKIE;
 291     }
 292
 293     public function sureLevel()
 294     {
 295         return AUTH_MDP;
 296     }
 297
 298
 299     public function updateNbNotifs()
 300     {
 301         require_once 'notifs.inc.php';
 302         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 303         S::set('notifs', $n->numRows());
 304     }
 305
 306     public function setAccessCookie($replace = false, $log = true) {
 307         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 308             return;
 309         }
 310         Cookie::set('access', sha1(S::v('password')), 300, true);
 311         if ($log) {
 312             S::logger()->log('cookie_on');
 313         }
 314     }
 315
 316     public function killAccessCookie($log = true) {
 317         Cookie::kill('access');
 318         if ($log) {
 319             S::logger()->log('cookie_off');
 320         }
 321     }
 322
 323     public function killLoginFormCookies() {
 324         Cookie::kill('uid');
 325         Cookie::kill('domain');
 326     }
 327 }
 328
 329 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 330 ?>