classes/xorgsession.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2009 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::getSilentWithValues(null, array('user_id' => 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::getSilentWithValues(null, array('user_id' => $uid));
 179     }
 180
 181     protected function startSessionAs($user, $level)
 182     {
 183         if ((!is_null(S::v('user')) && S::v('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                         INNER 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  logger.last_sessions AS ls ON (ls.uid = a.uid)
 210                          LEFT JOIN  logger.sessions AS s  ON(s.id = ls.id)
 211                              WHERE  a.uid = {?} AND a.state = 'active'", $user->id());
 212         $sess = $res->fetchOneAssoc();
 213         $perms = $sess['perms'];
 214         unset($sess['perms']);
 215
 216         // Loads the data into the real session.
 217         $_SESSION = array_merge($_SESSION, $sess);
 218
 219         // Starts the session's logger, and sets up the permanent cookie.
 220         if (S::suid()) {
 221             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 222         } else {
 223             S::logger()->saveLastSession();
 224             Cookie::set('uid', $user->id(), 300);
 225
 226             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 227                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 228             } else {
 229                 $this->killAccessCookie();
 230             }
 231         }
 232
 233         // Finalizes the session setup.
 234         $this->makePerms($perms, S::b('is_admin'));
 235         $this->securityChecks();
 236         $this->setSkin();
 237         $this->updateNbNotifs();
 238         check_redirect();
 239
 240         // We should not have to use this private data anymore
 241         S::kill('auth_by_cookie');
 242         return true;
 243     }
 244
 245     /** Start a session without authentication data for the given user.
 246      * This is used to identify the user after his registration, to be
 247      * removed after rewriting registration procedure.
 248      * XXX: Temporary
 249      */
 250     public function startWeakSession($user)
 251     {
 252         if (!$this->startSessionAs($user, AUTH_MDP)) {
 253             $this->destroy();
 254             return false;
 255         }
 256         S::set('auth', AUTH_MDP);
 257         return true;
 258     }
 259
 260     private function securityChecks()
 261     {
 262         $mail_subject = array();
 263         if (check_account()) {
 264             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 265         }
 266         if (check_ip('unsafe')) {
 267             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 268             if (check_ip('ban')) {
 269                 send_warning_mail(implode(' - ', $mail_subject));
 270                 $this->destroy();
 271                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 272                                     . 'Merci de contacter au plus vite '
 273                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 274                 return false;
 275             }
 276         }
 277         if (count($mail_subject)) {
 278             send_warning_mail(implode(' - ', $mail_subject));
 279         }
 280     }
 281
 282     public function tokenAuth($login, $token)
 283     {
 284         $res = XDB::query('SELECT  a.uid AS user_id, a.hruid
 285                              FROM  aliases  AS l
 286                        INNER JOIN  accounts AS a ON (l.id = a.uid AND a.state = \'active\')
 287                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 288                            $token, $login);
 289         if ($res->numRows() == 1) {
 290             return new User(null, $res->fetchOneAssoc());
 291         }
 292         return null;
 293     }
 294
 295     protected function makePerms($perm, $is_admin)
 296     {
 297         S::set('perms', User::makePerms($perm, $is_admin));
 298     }
 299
 300     public function setSkin()
 301     {
 302         if (S::logged() && (!S::has('skin') || S::suid())) {
 303             $res = XDB::query('SELECT  skin_tpl
 304                                  FROM  accounts AS a
 305                            INNER JOIN  skins    AS s on (a.skin = s.id)
 306                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 307             S::set('skin', $res->fetchOneCell());
 308         }
 309     }
 310
 311     public function loggedLevel()
 312     {
 313         return AUTH_COOKIE;
 314     }
 315
 316     public function sureLevel()
 317     {
 318         return AUTH_MDP;
 319     }
 320
 321
 322     public function updateNbNotifs()
 323     {
 324         require_once 'notifs.inc.php';
 325         $user = S::user();
 326         $n = Watch::getCount($user);
 327         S::set('notifs', $n);
 328     }
 329
 330     public function setAccessCookie($replace = false, $log = true) {
 331         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 332             return;
 333         }
 334         Cookie::set('access', sha1(S::user()->password()), 300, true);
 335         if ($log) {
 336             S::logger()->log('cookie_on');
 337         }
 338     }
 339
 340     public function killAccessCookie($log = true) {
 341         Cookie::kill('access');
 342         if ($log) {
 343             S::logger()->log('cookie_off');
 344         }
 345     }
 346
 347     public function killLoginFormCookies() {
 348         Cookie::kill('uid');
 349         Cookie::kill('domain');
 350     }
 351 }
 352
 353 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 354 ?>