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             $_SESSION['log']->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('ORGaccess') == '' || !Cookie::has('ORGuid')) {
  51             return -1;
  52         }
  53
  54         $res = XDB::query('SELECT  uid, password
  55                              FROM  accounts
  56                             WHERE  uid = {?} AND state = \'active\'',
  57                          Cookie::i('ORGuid'));
  58         if ($res->numRows() != 0) {
  59             list($uid, $password) = $res->fetchOneRow();
  60             $expected_value = sha1($password);
  61             if ($expected_value == Cookie::v('ORGaccess')) {
  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 != $expected_response) {
  82                 S::logger($uid)->log('auth_fail', 'bad password');
  83                 return null;
  84             }
  85             return $uid;
  86         }
  87         return null;
  88     }
  89
  90
  91     /** Check auth.
  92      */
  93     protected function doAuth($level)
  94     {
  95         global $globals;
  96
  97         /* Cookie authentication
  98          */
  99         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 100             $this->tryCookie();
 101         }
 102         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 103             if (!S::logged()) {
 104                 S::set('auth', AUTH_COOKIE);
 105             }
 106             return S::i('auth_by_cookie');
 107         }
 108
 109
 110         /* We want to do auth... we must have infos from a form.
 111          */
 112         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 113             return null;
 114         }
 115
 116         /** We come from an authentication form.
 117          */
 118         if (S::has('suid')) {
 119             $suid  = S::v('suid');
 120             $login = $uname = $suid['uid'];
 121             $redirect = false;
 122         } else {
 123             $uname = Env::v('username');
 124             if (Env::v('domain') == "alias") {
 125                 $res = XDB::query('SELECT  redirect
 126                                      FROM  virtual
 127                                INNER JOIN  virtual_redirect USING(vid)
 128                                     WHERE  alias LIKE {?}',
 129                                    $uname . '@' . $globals->mail->alias_dom);
 130                 $redirect = $res->fetchOneCell();
 131                 if ($redirect) {
 132                     $login = substr($redirect, 0, strpos($redirect, '@'));
 133                 } else {
 134                     $login = '';
 135                 }
 136             } else {
 137                 $login = $uname;
 138                 $redirect = false;
 139             }
 140         }
 141
 142         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && is_numeric($uname)) ? 'id' : 'alias');
 143         if (!is_null($uid) && S::has('suid')) {
 144             $suid = S::v('suid');
 145             if ($suid['uid'] == $uid) {
 146                 $uid = S::i('uid');
 147             } else {
 148                 $uid = null;
 149             }
 150         }
 151         if (!is_null($uid)) {
 152             S::set('auth', AUTH_MDP);
 153             if (!S::has('suid')) {
 154                 if (Post::has('domain')) {
 155                     if (($domain = Post::v('domain', 'login')) == 'alias') {
 156                         setcookie('ORGdomain', "alias", (time() + 25920000), '/', '', 0);
 157                     } else {
 158                         setcookie('ORGdomain', '', (time() - 3600), '/', '', 0);
 159                     }
 160                     // pour que la modification soit effective dans le reste de la page
 161                     $_COOKIE['ORGdomain'] = $domain;
 162                 }
 163             }
 164             S::kill('challenge');
 165             S::logger($uid)->log('auth_ok');
 166         }
 167         return $uid;
 168     }
 169
 170     protected function startSessionAs($uid, $level)
 171     {
 172         if ((!is_null(S::v('user')) && S::i('user') != $uid) || (S::has('uid') && S::i('uid') != $uid)) {
 173             return false;
 174         } else if (S::has('uid')) {
 175             return true;
 176         }
 177         if ($level == AUTH_SUID) {
 178             S::set('auth', AUTH_MDP);
 179         }
 180         unset($_SESSION['log']);
 181
 182         // Retrieves main user properties.
 183         /** TODO: Move needed informations to account tables */
 184         /** TODO: Currently suppressed data are matricule, promo */
 185         /** TODO: Data to move are: banana_last, watch_last, last_version */
 186         /** TODO: Switch to new permission system */
 187         $res  = XDB::query("SELECT  a.uid, a.hruid, a.display_name, a.full_name, a.password,
 188                                     a.sex = 'female' AS femme, a.mail_format as mail_fmt,
 189                                     a.token, FIND_IN_SET('watch', a.flags) AS watch_account,
 190                                     UNIX_TIMESTAMP(q.banana_last) AS banana_last, q.watch_last,
 191                                     q.last_version, g.g_account_name IS NOT NULL AS googleapps,
 192                                     UNIX_TIMESTAMP(s.start) AS lastlogin, s.host,
 193                                     IF(a.is_admin, 'admin', 'user') AS perms
 194                               FROM  accounts        AS a
 195                         INNER JOIN  auth_user_quick AS q  ON(a.uid = q.user_id)
 196                          LEFT JOIN  gapps_accounts  AS g  ON(a.uid = g.l_userid AND g.g_status = 'active')
 197                          LEFT JOIN  logger.last_sessions AS ls ON (ls.uid = a.uid)
 198                          LEFT JOIN  logger.sessions AS s  ON(s.id = ls.id)
 199                              WHERE  a.uid = {?} AND a.state = 'active'", $uid);
 200         $sess = $res->fetchOneAssoc();
 201         $perms = $sess['perms'];
 202         unset($sess['perms']);
 203
 204         // Loads the data into the real session.
 205         $_SESSION = array_merge($_SESSION, $sess);
 206
 207         // Starts the session's logger, and sets up the permanent cookie.
 208         if (S::has('suid')) {
 209             $suid = S::v('suid');
 210             $logger = S::logger($uid);
 211             $logger->log("suid_start", S::v('hruid') . " by " . $suid['hruid']);
 212         } else {
 213             $logger = S::logger($uid);
 214             $logger->saveLastSession();
 215             setcookie('ORGuid', $uid, (time() + 25920000), '/', '', 0);
 216
 217             if (S::i('auth_by_cookie') == $uid || Post::v('remember', 'false') == 'true') {
 218                 $cookie = sha1($sess['password']);
 219                 setcookie('ORGaccess', $cookie, (time() + 25920000), '/', '', 0);
 220                 if ($logger && S::i('auth_by_cookie') != $uid) {
 221                     $logger->log("cookie_on");
 222                 }
 223             } else {
 224                 setcookie('ORGaccess', '', time() - 3600, '/', '', 0);
 225                 if ($logger) {
 226                     $logger->log("cookie_off");
 227                 }
 228             }
 229         }
 230
 231         // Finalizes the session setup.
 232         S::set('perms', User::makePerms($perms));
 233         $this->securityChecks();
 234         $this->setSkin();
 235         $this->updateNbNotifs();
 236         check_redirect();
 237
 238         // We should not have to use this private data anymore
 239         S::kill('auth_by_cookie');
 240         return true;
 241     }
 242
 243     private function securityChecks()
 244     {
 245         $mail_subject = array();
 246         if (check_account()) {
 247             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 248         }
 249         if (check_ip('unsafe')) {
 250             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 251             if (check_ip('ban')) {
 252                 send_warning_mail(implode(' - ', $mail_subject));
 253                 $this->destroy();
 254                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 255                                     . 'Merci de contacter au plus vite '
 256                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 257                 return false;
 258             }
 259         }
 260         if (count($mail_subject)) {
 261             send_warning_mail(implode(' - ', $mail_subject));
 262         }
 263     }
 264
 265     public function tokenAuth($login, $token)
 266     {
 267         $res = XDB::query('SELECT  a.hruid
 268                              FROM  aliases  AS l
 269                        INNER JOIN  accounts AS a ON (l.id = a.uid AND a.state = \'active\')
 270                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 271                            $token, $login);
 272         if ($res->numRows() == 1) {
 273             $data = $res->fetchOneAssoc();
 274             return new User($data['hruid'], $data);
 275         }
 276         return null;
 277     }
 278
 279     public function makePerms($perm)
 280     {
 281         $flags = new PlFlagSet();
 282         if ($perm == 'disabled' || $perm == 'ext') {
 283             S::set('perms', $flags);
 284             return;
 285         }
 286         $flags->addFlag(PERMS_USER);
 287         if ($perm == 'admin') {
 288             $flags->addFlag(PERMS_ADMIN);
 289         }
 290         S::set('perms', $flags);
 291     }
 292
 293     public function setSkin()
 294     {
 295         if (S::logged() && (!S::has('skin') || S::has('suid'))) {
 296             $uid = S::v('uid');
 297             $res = XDB::query('SELECT  skin_tpl
 298                                  FROM  accounts AS a
 299                            INNER JOIN  skins    AS s on (a.skin = s.id)
 300                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 301             S::set('skin', $res->fetchOneCell());
 302         }
 303     }
 304
 305     public function loggedLevel()
 306     {
 307         return AUTH_COOKIE;
 308     }
 309
 310     public function sureLevel()
 311     {
 312         return AUTH_MDP;
 313     }
 314
 315
 316     public function updateNbNotifs()
 317     {
 318         require_once 'notifs.inc.php';
 319         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 320         S::set('notifs', $n->numRows());
 321     }
 322 }
 323
 324 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 325 ?>