classes/xorgsession.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 class XorgSession extends PlSession
  23 {
  24     const INVALID_USER = -2;
  25     const NO_COOKIE = -1;
  26     const COOKIE_SUCCESS = 0;
  27     const INVALID_COOKIE = 1;
  28
  29     public function __construct()
  30     {
  31         parent::__construct();
  32     }
  33
  34     public function startAvailableAuth()
  35     {
  36         if (!S::logged()) {
  37             switch ($this->tryCookie()) {
  38               case self::COOKIE_SUCCESS:
  39                 if (!$this->start(AUTH_COOKIE)) {
  40                     return false;
  41                 }
  42                 break;
  43
  44               case self::INVALID_USER:
  45               case self::INVALID_COOKIE:
  46                 return false;
  47             }
  48         }
  49         if ((check_ip('dangerous') && S::has('uid')) || check_account()) {
  50             S::logger()->log("view_page", $_SERVER['REQUEST_URI']);
  51         }
  52         return true;
  53     }
  54
  55     /** Check the cookie and set the associated user_id in the auth_by_cookie session variable.
  56      */
  57     private function tryCookie()
  58     {
  59         S::kill('auth_by_cookie');
  60         if (Cookie::v('access') == '' || !Cookie::has('uid')) {
  61             return self::NO_COOKIE;
  62         }
  63
  64         $res = XDB::query('SELECT  uid, password
  65                              FROM  accounts
  66                             WHERE  uid = {?} AND state = \'active\'',
  67                          Cookie::i('uid'));
  68         if ($res->numRows() != 0) {
  69             list($uid, $password) = $res->fetchOneRow();
  70             if (sha1($password) == Cookie::v('access')) {
  71                 S::set('auth_by_cookie', $uid);
  72                 return self::COOKIE_SUCCESS;
  73             } else {
  74                 return self::INVALID_COOKIE;
  75             }
  76         }
  77         return self::INVALID_USER;
  78     }
  79
  80     private function checkPassword($uname, $login, $response, $login_type)
  81     {
  82         $res = XDB::query('SELECT  a.uid, a.password
  83                              FROM  accounts AS a
  84                        INNER JOIN  aliases  AS l ON (l.id = a.uid AND l.type != \'homonyme\')
  85                             WHERE  l.' . $login_type . ' = {?} AND a.state = \'active\'',
  86                           $login);
  87         if (list($uid, $password) = $res->fetchOneRow()) {
  88             $expected_response = sha1("$uname:$password:" . S::v('challenge'));
  89             /* XXX: Deprecates len(password) > 10 conversion */
  90             if ($response != $expected_response) {
  91                 if (!S::logged()) {
  92                     Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
  93                 } else {
  94                     Platal::page()->trigError('Mot de passe invalide');
  95                 }
  96                 S::logger($uid)->log('auth_fail', 'bad password');
  97                 return null;
  98             }
  99             return $uid;
 100         }
 101         Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
 102         return null;
 103     }
 104
 105
 106     /** Check auth.
 107      */
 108     protected function doAuth($level)
 109     {
 110         global $globals;
 111
 112         /* Cookie authentication
 113          */
 114         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 115             $this->tryCookie();
 116         }
 117         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 118             if (!S::logged()) {
 119                 S::set('auth', AUTH_COOKIE);
 120             }
 121             return User::getSilentWithUID(S::i('auth_by_cookie'));
 122         }
 123
 124
 125         /* We want to do auth... we must have infos from a form.
 126          */
 127         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 128             return null;
 129         }
 130
 131         /** We come from an authentication form.
 132          */
 133         if (S::suid()) {
 134             $login = $uname = S::suid('uid');
 135             $redirect = false;
 136         } else {
 137             $uname = Env::v('username');
 138             if (Env::v('domain') == "alias") {
 139                 $res = XDB::query('SELECT  redirect
 140                                      FROM  virtual
 141                                INNER JOIN  virtual_redirect USING(vid)
 142                                     WHERE  alias LIKE {?}',
 143                                    $uname . '@' . $globals->mail->alias_dom);
 144                 $redirect = $res->fetchOneCell();
 145                 if ($redirect) {
 146                     $login = substr($redirect, 0, strpos($redirect, '@'));
 147                 } else {
 148                     $login = '';
 149                 }
 150             } else {
 151                 $login = $uname;
 152                 $redirect = false;
 153             }
 154         }
 155
 156         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && is_numeric($uname)) ? 'id' : 'alias');
 157         if (!is_null($uid) && S::suid()) {
 158             if (S::suid('uid') == $uid) {
 159                 $uid = S::i('uid');
 160             } else {
 161                 $uid = null;
 162             }
 163         }
 164         if (!is_null($uid)) {
 165             S::set('auth', AUTH_MDP);
 166             if (!S::suid()) {
 167                 if (Post::has('domain')) {
 168                     if (($domain = Post::v('domain', 'login')) == 'alias') {
 169                         Cookie::set('domain', 'alias', 300);
 170                     } else {
 171                         Cookie::kill('domain');
 172                     }
 173                 }
 174             }
 175             S::kill('challenge');
 176             S::logger($uid)->log('auth_ok');
 177         }
 178         return User::getSilentWithUID($uid);
 179     }
 180
 181     protected function startSessionAs($user, $level)
 182     {
 183         if ((!is_null(S::user()) && S::user()->id() != $user->id())
 184             || (S::has('uid') && S::i('uid') != $user->id())) {
 185             return false;
 186         } else if (S::has('uid')) {
 187             return true;
 188         }
 189         if ($level == AUTH_SUID) {
 190             S::set('auth', AUTH_MDP);
 191         }
 192
 193         // Retrieves main user properties.
 194         /** TODO: Move needed informations to account tables */
 195         /** TODO: Currently suppressed data are matricule, promo */
 196         /** TODO: Use the User object to fetch all this */
 197         $res  = XDB::query("SELECT  a.uid, a.hruid, a.display_name, a.full_name,
 198                                     a.sex = 'female' AS femme, a.email_format,
 199                                     a.token, FIND_IN_SET('watch', a.flags) AS watch_account,
 200                                     UNIX_TIMESTAMP(fp.last_seen) AS banana_last, UNIX_TIMESTAMP(w.last) AS watch_last,
 201                                     a.last_version, g.g_account_name IS NOT NULL AS googleapps,
 202                                     UNIX_TIMESTAMP(s.start) AS lastlogin, s.host,
 203                                     a.is_admin, at.perms
 204                               FROM  accounts          AS a
 205                         INNER JOIN  account_types     AS at ON (a.type = at.type)
 206                          LEFT JOIN  watch             AS w  ON (w.uid = a.uid)
 207                          LEFT JOIN  forum_profiles    AS fp ON (fp.uid = a.uid)
 208                          LEFT JOIN  gapps_accounts    AS g  ON (a.uid = g.l_userid AND g.g_status = 'active')
 209                          LEFT JOIN  log_last_sessions AS ls ON (ls.uid = a.uid)
 210                          LEFT JOIN  log_sessions      AS s  ON(s.id = ls.id)
 211                              WHERE  a.uid = {?} AND a.state = 'active'", $user->id());
 212         if ($res->numRows() != 1) {
 213             return false;
 214         }
 215
 216         $sess = $res->fetchOneAssoc();
 217         $perms = $sess['perms'];
 218         unset($sess['perms']);
 219
 220         // Loads the data into the real session.
 221         $_SESSION = array_merge($_SESSION, $sess);
 222
 223         // Starts the session's logger, and sets up the permanent cookie.
 224         if (S::suid()) {
 225             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 226         } else {
 227             S::logger()->saveLastSession();
 228             Cookie::set('uid', $user->id(), 300);
 229
 230             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 231                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 232             } else {
 233                 $this->killAccessCookie();
 234             }
 235         }
 236
 237         // Finalizes the session setup.
 238         $this->makePerms($perms, S::b('is_admin'));
 239         $this->securityChecks();
 240         $this->setSkin();
 241         $this->updateNbNotifs();
 242         check_redirect();
 243
 244         // We should not have to use this private data anymore
 245         S::kill('auth_by_cookie');
 246         return true;
 247     }
 248
 249     private function securityChecks()
 250     {
 251         $mail_subject = array();
 252         if (check_account()) {
 253             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 254         }
 255         if (check_ip('unsafe')) {
 256             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 257             if (check_ip('ban')) {
 258                 send_warning_mail(implode(' - ', $mail_subject));
 259                 $this->destroy();
 260                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 261                                     . 'Merci de contacter au plus vite '
 262                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 263                 return false;
 264             }
 265         }
 266         if (count($mail_subject)) {
 267             send_warning_mail(implode(' - ', $mail_subject));
 268         }
 269     }
 270
 271     public function tokenAuth($login, $token)
 272     {
 273         $res = XDB::query('SELECT  a.uid AS user_id, a.hruid
 274                              FROM  aliases  AS l
 275                        INNER JOIN  accounts AS a ON (l.id = a.uid AND a.state = \'active\')
 276                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 277                            $token, $login);
 278         if ($res->numRows() == 1) {
 279             return new User(null, $res->fetchOneAssoc());
 280         }
 281         return null;
 282     }
 283
 284     protected function makePerms($perm, $is_admin)
 285     {
 286         S::set('perms', User::makePerms($perm, $is_admin));
 287     }
 288
 289     public function setSkin()
 290     {
 291         if (S::logged() && (!S::has('skin') || S::suid())) {
 292             $res = XDB::query('SELECT  skin_tpl
 293                                  FROM  accounts AS a
 294                            INNER JOIN  skins    AS s on (a.skin = s.id)
 295                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 296             S::set('skin', $res->fetchOneCell());
 297         }
 298     }
 299
 300     public function loggedLevel()
 301     {
 302         return AUTH_COOKIE;
 303     }
 304
 305     public function sureLevel()
 306     {
 307         return AUTH_MDP;
 308     }
 309
 310
 311     public function updateNbNotifs()
 312     {
 313         require_once 'notifs.inc.php';
 314         $user = S::user();
 315         $n = Watch::getCount($user);
 316         S::set('notifs', $n);
 317     }
 318
 319     public function setAccessCookie($replace = false, $log = true) {
 320         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 321             return;
 322         }
 323         Cookie::set('access', sha1(S::user()->password()), 300, true);
 324         if ($log) {
 325             S::logger()->log('cookie_on');
 326         }
 327     }
 328
 329     public function killAccessCookie($log = true) {
 330         Cookie::kill('access');
 331         if ($log) {
 332             S::logger()->log('cookie_off');
 333         }
 334     }
 335
 336     public function killLoginFormCookies() {
 337         Cookie::kill('uid');
 338         Cookie::kill('domain');
 339     }
 340 }
 341
 342 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 343 ?>