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 $uid;
  91         }
  92         Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
  93         return null;
  94     }
  95
  96
  97     /** Check auth.
  98      */
  99     protected function doAuth($level)
 100     {
 101         global $globals;
 102
 103         /* Cookie authentication
 104          */
 105         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 106             $this->tryCookie();
 107         }
 108         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 109             if (!S::logged()) {
 110                 S::set('auth', AUTH_COOKIE);
 111             }
 112             return User::getSilentWithValues(null, array('user_id' => S::i('auth_by_cookie')));
 113         }
 114
 115
 116         /* We want to do auth... we must have infos from a form.
 117          */
 118         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 119             return null;
 120         }
 121
 122         /** We come from an authentication form.
 123          */
 124         if (S::suid()) {
 125             $login = $uname = S::suid('uid');
 126             $redirect = false;
 127         } else {
 128             $uname = Env::v('username');
 129             if (Env::v('domain') == "alias") {
 130                 $res = XDB::query('SELECT  redirect
 131                                      FROM  virtual
 132                                INNER JOIN  virtual_redirect USING(vid)
 133                                     WHERE  alias LIKE {?}',
 134                                    $uname . '@' . $globals->mail->alias_dom);
 135                 $redirect = $res->fetchOneCell();
 136                 if ($redirect) {
 137                     $login = substr($redirect, 0, strpos($redirect, '@'));
 138                 } else {
 139                     $login = '';
 140                 }
 141             } else {
 142                 $login = $uname;
 143                 $redirect = false;
 144             }
 145         }
 146
 147         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && is_numeric($uname)) ? 'id' : 'alias');
 148         if (!is_null($uid) && S::suid()) {
 149             if (S::suid('uid') == $uid) {
 150                 $uid = S::i('uid');
 151             } else {
 152                 $uid = null;
 153             }
 154         }
 155         if (!is_null($uid)) {
 156             S::set('auth', AUTH_MDP);
 157             if (!S::suid()) {
 158                 if (Post::has('domain')) {
 159                     if (($domain = Post::v('domain', 'login')) == 'alias') {
 160                         Cookie::set('domain', 'alias', 300);
 161                     } else {
 162                         Cookie::kill('domain');
 163                     }
 164                 }
 165             }
 166             S::kill('challenge');
 167             S::logger($uid)->log('auth_ok');
 168         }
 169         return User::getSilentWithValues(null, array('user_id' => $uid));
 170     }
 171
 172     protected function startSessionAs($user, $level)
 173     {
 174         if ((!is_null(S::v('user')) && S::v('user')->id() != $user->id())
 175             || (S::has('uid') && S::i('uid') != $user->id())) {
 176             return false;
 177         } else if (S::has('uid')) {
 178             return true;
 179         }
 180         if ($level == AUTH_SUID) {
 181             S::set('auth', AUTH_MDP);
 182         }
 183
 184         // Retrieves main user properties.
 185         /** TODO: Move needed informations to account tables */
 186         /** TODO: Currently suppressed data are matricule, promo */
 187         /** TODO: Data to move are: banana_last, watch_last, last_version */
 188         /** TODO: Use the User object to fetch all this */
 189         $res  = XDB::query("SELECT  a.uid, a.hruid, a.display_name, a.full_name, a.password,
 190                                     a.sex = 'female' AS femme, a.email_format,
 191                                     a.token, FIND_IN_SET('watch', a.flags) AS watch_account,
 192                                     UNIX_TIMESTAMP(fp.last_seen) AS banana_last, q.watch_last,
 193                                     q.last_version, g.g_account_name IS NOT NULL AS googleapps,
 194                                     UNIX_TIMESTAMP(s.start) AS lastlogin, s.host,
 195                                     a.is_admin, at.perms
 196                               FROM  accounts        AS a
 197                         INNER JOIN  account_types   AS at ON(a.type = at.type)
 198                         INNER JOIN  auth_user_quick AS q  ON(a.uid = q.user_id)
 199                          LEFT JOIN  forum_profiles  AS fp ON(fp.uid = a.uid)
 200                          LEFT JOIN  gapps_accounts  AS g  ON(a.uid = g.l_userid AND g.g_status = 'active')
 201                          LEFT JOIN  logger.last_sessions AS ls ON (ls.uid = a.uid)
 202                          LEFT JOIN  logger.sessions AS s  ON(s.id = ls.id)
 203                              WHERE  a.uid = {?} AND a.state = 'active'", $user->id());
 204         $sess = $res->fetchOneAssoc();
 205         $perms = $sess['perms'];
 206         unset($sess['perms']);
 207
 208         // Loads the data into the real session.
 209         $_SESSION = array_merge($_SESSION, $sess);
 210
 211         // Starts the session's logger, and sets up the permanent cookie.
 212         if (S::suid()) {
 213             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 214         } else {
 215             S::logger()->saveLastSession();
 216             Cookie::set('uid', $user->id(), 300);
 217
 218             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 219                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 220             } else {
 221                 $this->killAccessCookie();
 222             }
 223         }
 224
 225         // Finalizes the session setup.
 226         $this->makePerms($perms, S::b('is_admin'));
 227         $this->securityChecks();
 228         $this->setSkin();
 229         $this->updateNbNotifs();
 230         check_redirect();
 231
 232         // We should not have to use this private data anymore
 233         S::kill('auth_by_cookie');
 234         return true;
 235     }
 236
 237     private function securityChecks()
 238     {
 239         $mail_subject = array();
 240         if (check_account()) {
 241             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 242         }
 243         if (check_ip('unsafe')) {
 244             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 245             if (check_ip('ban')) {
 246                 send_warning_mail(implode(' - ', $mail_subject));
 247                 $this->destroy();
 248                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 249                                     . 'Merci de contacter au plus vite '
 250                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 251                 return false;
 252             }
 253         }
 254         if (count($mail_subject)) {
 255             send_warning_mail(implode(' - ', $mail_subject));
 256         }
 257     }
 258
 259     public function tokenAuth($login, $token)
 260     {
 261         $res = XDB::query('SELECT  a.uid AS user_id, a.hruid
 262                              FROM  aliases  AS l
 263                        INNER JOIN  accounts AS a ON (l.id = a.uid AND a.state = \'active\')
 264                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 265                            $token, $login);
 266         if ($res->numRows() == 1) {
 267             return new User(null, $res->fetchOneAssoc());
 268         }
 269         return null;
 270     }
 271
 272     protected function makePerms($perm, $is_admin)
 273     {
 274         S::set('perms', User::makePerms($perm, $is_admin));
 275     }
 276
 277     public function setSkin()
 278     {
 279         if (S::logged() && (!S::has('skin') || S::suid())) {
 280             $uid = S::v('uid');
 281             $res = XDB::query('SELECT  skin_tpl
 282                                  FROM  accounts AS a
 283                            INNER JOIN  skins    AS s on (a.skin = s.id)
 284                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 285             S::set('skin', $res->fetchOneCell());
 286         }
 287     }
 288
 289     public function loggedLevel()
 290     {
 291         return AUTH_COOKIE;
 292     }
 293
 294     public function sureLevel()
 295     {
 296         return AUTH_MDP;
 297     }
 298
 299
 300     public function updateNbNotifs()
 301     {
 302         require_once 'notifs.inc.php';
 303         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 304         S::set('notifs', $n->numRows());
 305     }
 306
 307     public function setAccessCookie($replace = false, $log = true) {
 308         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 309             return;
 310         }
 311         Cookie::set('access', sha1(S::v('password')), 300, true);
 312         if ($log) {
 313             S::logger()->log('cookie_on');
 314         }
 315     }
 316
 317     public function killAccessCookie($log = true) {
 318         Cookie::kill('access');
 319         if ($log) {
 320             S::logger()->log('cookie_off');
 321         }
 322     }
 323
 324     public function killLoginFormCookies() {
 325         Cookie::kill('uid');
 326         Cookie::kill('domain');
 327     }
 328 }
 329
 330 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 331 ?>