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         $res = XDB::query('SELECT  user_id, password
  55                              FROM  auth_user_md5
  56                             WHERE  user_id = {?} AND perms IN(\'admin\', \'user\')',
  57                          Cookie::i('ORGuid'));
  58         if ($res->numRows() != 0) {
  59             list($uid, $password) = $res->fetchOneRow();
  60             require_once 'secure_hash.inc.php';
  61             $expected_value = hash_encrypt($password);
  62             if ($expected_value == Cookie::v('ORGaccess')) {
  63                 S::set('auth_by_cookie', $uid);
  64                 return 0;
  65             } else {
  66                 return 1;
  67             }
  68         }
  69         return -2;
  70     }
  71
  72     private function checkPassword($uname, $login, $response, $login_type)
  73     {
  74         $res = XDB::query('SELECT  u.user_id, u.password
  75                              FROM  auth_user_md5 AS u
  76                        INNER JOIN  aliases       AS a ON (a.id = u.user_id AND type != \'homonyme\')
  77                              WHERE  a.' . $login_type . ' = {?} AND u.perms IN(\'admin\', \'user\')',
  78                           $login);
  79         if (list($uid, $password) = $res->fetchOneRow()) {
  80             require_once 'secure_hash.inc.php';
  81             $expected_response = hash_encrypt("$uname:$password:" . S::v('challenge'));
  82             if ($response != $expected_response) {
  83                 $new_password = hash_xor(Env::v('xorpass'), $password);
  84                 $expected_response = hash_encrypt("$uname:$new_password:" . S::v('challenge'));
  85                 if ($response == $expected_response) {
  86                       XDB::execute('UPDATE  auth_user_md5
  87                                        SET  password = {?}
  88                                      WHERE  user_id = {?}',
  89                                    $new_password, $uid);
  90                       /* TODO: update GApps password here!!! */
  91                 }
  92             }
  93             if ($response != $expected_response) {
  94                 S::logger($uid)->log('auth_fail', 'bad password');
  95                 return null;
  96             }
  97             return $uid;
  98         }
  99         return null;
 100     }
 101
 102
 103     /** Check auth.
 104      */
 105     protected function doAuth($level)
 106     {
 107         global $globals;
 108
 109         /* Cookie authentication
 110          */
 111         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 112             $this->tryCookie();
 113         }
 114         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 115             if (!S::logged()) {
 116                 S::set('auth', AUTH_COOKIE);
 117             }
 118             return S::i('auth_by_cookie');
 119         }
 120
 121
 122         /* We want to do auth... we must have infos from a form.
 123          */
 124         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 125             return null;
 126         }
 127
 128         /** We come from an authentication form.
 129          */
 130         if (S::has('suid')) {
 131             $suid  = S::v('suid');
 132             $login = $uname = $suid['forlife'];
 133             $redirect = false;
 134         } else {
 135             $uname = Env::v('username');
 136
 137             if (Env::v('domain') == "alias") {
 138                 $res = XDB::query('SELECT  redirect
 139                                      FROM  virtual
 140                                INNER JOIN  virtual_redirect USING(vid)
 141                                     WHERE  alias LIKE {?}',
 142                                    $uname . '@' . $globals->mail->alias_dom);
 143                 $redirect = $res->fetchOneCell();
 144                 if ($redirect) {
 145                     $login = substr($redirect, 0, strpos($redirect, '@'));
 146                 } else {
 147                     $login = '';
 148                 }
 149             } else {
 150                 $login = $uname;
 151                 $redirect = false;
 152             }
 153         }
 154
 155         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && preg_match('/^\d*$/', $uname)) ? 'id' : 'alias');
 156         if (!is_null($uid)) {
 157             S::set('auth', AUTH_MDP);
 158             if (Post::has('domain')) {
 159                 if (($domain = Post::v('domain', 'login')) == 'alias') {
 160                     setcookie('ORGdomain', "alias", (time() + 25920000), '/', '', 0);
 161                 } else {
 162                     setcookie('ORGdomain', '', (time() - 3600), '/', '', 0);
 163                 }
 164                 // pour que la modification soit effective dans le reste de la page
 165                 $_COOKIE['ORGdomain'] = $domain;
 166             }
 167             S::kill('challenge');
 168             S::logger($uid)->log('auth_ok');
 169         }
 170         return $uid;
 171     }
 172
 173     protected function startSessionAs($uid, $level)
 174     {
 175         if ((!is_null(S::v('user')) && S::i('user') != $uid) || (S::has('uid') && S::i('uid') != $uid)) {
 176             return false;
 177         } else if (S::has('uid')) {
 178             return true;
 179         }
 180         if ($level == -1) {
 181             S::set('auth', AUTH_COOKIE);
 182         }
 183         unset($_SESSION['log']);
 184
 185         // Retrieves main user properties.
 186         $res  = XDB::query('SELECT  u.user_id AS uid, prenom, prenom_ini, nom, nom_ini, nom_usage, perms, promo, promo_sortie,
 187                                     matricule, password, FIND_IN_SET(\'femme\', u.flags) AS femme,
 188                                     a.alias AS forlife, a2.alias AS bestalias,
 189                                     q.core_mail_fmt AS mail_fmt, UNIX_TIMESTAMP(q.banana_last) AS banana_last, q.watch_last, q.core_rss_hash,
 190                                     FIND_IN_SET(\'watch\', u.flags) AS watch_account, q.last_version, g.g_account_name IS NOT NULL AS googleapps
 191                               FROM  auth_user_md5   AS u
 192                         INNER JOIN  auth_user_quick AS q  USING(user_id)
 193                         INNER JOIN  aliases         AS a  ON (u.user_id = a.id AND a.type = \'a_vie\')
 194                         INNER JOIN  aliases         AS a2 ON (u.user_id = a2.id AND FIND_IN_SET(\'bestalias\', a2.flags))
 195                          LEFT JOIN  gapps_accounts  AS g  ON (u.user_id = g.l_userid AND g.g_status = \'active\')
 196                              WHERE  u.user_id = {?} AND u.perms IN(\'admin\', \'user\')', $uid);
 197         $sess = $res->fetchOneAssoc();
 198         $perms = $sess['perms'];
 199         unset($sess['perms']);
 200
 201         // Retrieves account usage information (last login, last host).
 202         $res = XDB::query('SELECT  UNIX_TIMESTAMP(s.start) AS lastlogin, s.host
 203                              FROM  logger.sessions AS s
 204                             WHERE  s.uid = {?} AND s.suid = 0
 205                          ORDER BY  s.start DESC
 206                             LIMIT  1', $uid);
 207         if ($res->numRows()) {
 208             $sess = array_merge($sess, $res->fetchOneAssoc());
 209         }
 210
 211         // Loads the data into the real session.
 212         $_SESSION = array_merge($_SESSION, $sess);
 213
 214         // Starts the session's logger, and sets up the permanent cookie.
 215         if (S::has('suid')) {
 216             $suid = S::v('suid');
 217             $logger = S::logger($uid);
 218             $logger->log("suid_start", S::v('forlife') . " by " . $suid['uid']);
 219         } else {
 220             $logger = S::logger($uid);
 221             setcookie('ORGuid', $uid, (time() + 25920000), '/', '', 0);
 222
 223             if (S::i('auth_by_cookie') == $uid || Post::v('remember', 'false') == 'true') {
 224                 $cookie = hash_encrypt($sess['password']);
 225                 setcookie('ORGaccess', $cookie, (time() + 25920000), '/', '', 0);
 226                 if ($logger && S::i('auth_by_cookie') != $uid) {
 227                     $logger->log("cookie_on");
 228                 }
 229             } else {
 230                 setcookie('ORGaccess', '', time() - 3600, '/', '', 0);
 231                 if ($logger) {
 232                     $logger->log("cookie_off");
 233                 }
 234             }
 235         }
 236
 237         // Finalizes the session setup.
 238         $this->makePerms($perms);
 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         // FIXME: we broke the session here because some RSS feeds (mainly wiki feeds) require
 274         // a valid nome and checks the permissions. When the PlUser object will be ready, we'll
 275         // be able to return a simple 'PlUser' object here without trying to alterate the
 276         // session.
 277         $res = XDB::query('SELECT  u.user_id AS uid, u.perms, u.nom, u.nom_usage, u.prenom, u.promo, FIND_IN_SET(\'femme\', u.flags) AS sexe
 278                              FROM  aliases         AS a
 279                        INNER JOIN  auth_user_md5   AS u ON (a.id = u.user_id AND u.perms IN ("admin", "user"))
 280                        INNER JOIN  auth_user_quick AS q ON (a.id = q.user_id AND q.core_rss_hash = {?})
 281                             WHERE  a.alias = {?} AND a.type != "homonyme"', $token, $login);
 282         if ($res->numRows() == 1) {
 283             $sess = $res->fetchOneAssoc();
 284             if (!S::has('uid')) {
 285                 $_SESSION = $sess;
 286                 $this->makePerms($sess['perms']);
 287                 return S::i('uid');
 288             } else if (S::i('uid') == $sess['uid']) {
 289                 return S::i('uid');
 290             } else {
 291                 Platal::page()->kill('Invalid state. To be fixed when hruid is ready');
 292             }
 293         }
 294         return null;
 295     }
 296
 297     public function makePerms($perm)
 298     {
 299         $flags = new PlFlagSet();
 300         if ($perm == 'disabled' || $perm == 'ext') {
 301             S::set('perms', $flags);
 302             return;
 303         }
 304         $flags->addFlag(PERMS_USER);
 305         if ($perm == 'admin') {
 306             $flags->addFlag(PERMS_ADMIN);
 307         }
 308         S::set('perms', $flags);
 309     }
 310
 311     public function setSkin()
 312     {
 313         global $globals;
 314         if (S::logged() && (!S::has('skin') || S::has('suid'))) {
 315             $uid = S::v('uid');
 316             $res = XDB::query("SELECT  skin_tpl
 317                                  FROM  auth_user_quick AS a
 318                            INNER JOIN  skins           AS s ON a.skin = s.id
 319                                 WHERE  user_id = {?} AND skin_tpl != ''", $uid);
 320             S::set('skin', $res->fetchOneCell());
 321         }
 322     }
 323
 324     public function loggedLevel()
 325     {
 326         return AUTH_COOKIE;
 327     }
 328
 329     public function sureLevel()
 330     {
 331         return AUTH_MDP;
 332     }
 333
 334
 335     public function updateNbNotifs()
 336     {
 337         require_once 'notifs.inc.php';
 338         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 339         S::set('notifs', $n->numRows());
 340     }
 341 }
 342
 343 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 344 ?>