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, $uid);
  90                 }
  91             }
  92             if ($response != $expected_response) {
  93                 S::logger($uid)->log('auth_fail', 'bad password');
  94                 return null;
  95             }
  96             return $uid;
  97         }
  98         return null;
  99     }
 100
 101
 102     /** Check auth.
 103      */
 104     protected function doAuth($level)
 105     {
 106         global $globals;
 107
 108         /* Cookie authentication
 109          */
 110         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 111             $this->tryCookie();
 112         }
 113         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 114             if (!S::logged()) {
 115                 S::set('auth', AUTH_COOKIE);
 116             }
 117             return S::i('auth_by_cookie');
 118         }
 119
 120
 121         /* We want to do auth... we must have infos from a form.
 122          */
 123         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 124             return null;
 125         }
 126
 127         /** We come from an authentication form.
 128          */
 129         if (S::has('suid')) {
 130             $suid  = S::v('suid');
 131             $login = $uname = $suid['forlife'];
 132             $redirect = false;
 133         } else {
 134             $uname = Env::v('username');
 135
 136             if (Env::v('domain') == "alias") {
 137                 $res = XDB::query('SELECT  redirect
 138                                      FROM  virtual
 139                                INNER JOIN  virtual_redirect USING(vid)
 140                                     WHERE  alias LIKE {?}',
 141                                    $uname . '@' . $globals->mail->alias_dom);
 142                 $redirect = $res->fetchOneCell();
 143                 if ($redirect) {
 144                     $login = substr($redirect, 0, strpos($redirect, '@'));
 145                 } else {
 146                     $login = '';
 147                 }
 148             } else {
 149                 $login = $uname;
 150                 $redirect = false;
 151             }
 152         }
 153
 154         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && preg_match('/^\d*$/', $uname)) ? 'id' : 'alias');
 155         if (!is_null($uid)) {
 156             S::set('auth', AUTH_MDP);
 157             if (Post::has('domain')) {
 158                 if (($domain = Post::v('domain', 'login')) == 'alias') {
 159                     setcookie('ORGdomain', "alias", (time() + 25920000), '/', '', 0);
 160                 } else {
 161                     setcookie('ORGdomain', '', (time() - 3600), '/', '', 0);
 162                 }
 163                 // pour que la modification soit effective dans le reste de la page
 164                 $_COOKIE['ORGdomain'] = $domain;
 165             }
 166             S::kill('challenge');
 167             S::logger($uid)->log('auth_ok');
 168         }
 169         return $uid;
 170     }
 171
 172     protected function startSessionAs($uid, $level)
 173     {
 174         if ((!is_null(S::v('user')) && S::i('user') != $uid) || (S::has('uid') && S::i('uid') != $uid)) {
 175             return false;
 176         } else if (S::has('uid')) {
 177             return true;
 178         }
 179         if ($level == -1) {
 180             S::set('auth', AUTH_COOKIE);
 181         }
 182         unset($_SESSION['log']);
 183
 184         // Retrieves main user properties.
 185         $res  = XDB::query('SELECT  u.user_id AS uid, prenom, prenom_ini, nom, nom_ini, nom_usage, perms, promo, promo_sortie,
 186                                     matricule, password, FIND_IN_SET(\'femme\', u.flags) AS femme,
 187                                     a.alias AS forlife, a2.alias AS bestalias,
 188                                     q.core_mail_fmt AS mail_fmt, UNIX_TIMESTAMP(q.banana_last) AS banana_last, q.watch_last, q.core_rss_hash,
 189                                     FIND_IN_SET(\'watch\', u.flags) AS watch_account, q.last_version, g.g_account_name IS NOT NULL AS googleapps
 190                               FROM  auth_user_md5   AS u
 191                         INNER JOIN  auth_user_quick AS q  USING(user_id)
 192                         INNER JOIN  aliases         AS a  ON (u.user_id = a.id AND a.type = \'a_vie\')
 193                         INNER JOIN  aliases         AS a2 ON (u.user_id = a2.id AND FIND_IN_SET(\'bestalias\', a2.flags))
 194                          LEFT JOIN  gapps_accounts  AS g  ON (u.user_id = g.l_userid AND g.g_status = \'active\')
 195                              WHERE  u.user_id = {?} AND u.perms IN(\'admin\', \'user\')', $uid);
 196         $sess = $res->fetchOneAssoc();
 197         $perms = $sess['perms'];
 198         unset($sess['perms']);
 199
 200         // Retrieves account usage information (last login, last host).
 201         $res = XDB::query('SELECT  UNIX_TIMESTAMP(s.start) AS lastlogin, s.host
 202                              FROM  logger.sessions AS s
 203                             WHERE  s.uid = {?} AND s.suid = 0
 204                          ORDER BY  s.start DESC
 205                             LIMIT  1', $uid);
 206         if ($res->numRows()) {
 207             $sess = array_merge($sess, $res->fetchOneAssoc());
 208         }
 209
 210         // Loads the data into the real session.
 211         $_SESSION = array_merge($_SESSION, $sess);
 212
 213         // Starts the session's logger, and sets up the permanent cookie.
 214         if (S::has('suid')) {
 215             $suid = S::v('suid');
 216             $logger = S::logger($uid);
 217             $logger->log("suid_start", S::v('forlife') . " by " . $suid['uid']);
 218         } else {
 219             $logger = S::logger($uid);
 220             setcookie('ORGuid', $uid, (time() + 25920000), '/', '', 0);
 221
 222             if (S::i('auth_by_cookie') == $uid || Post::v('remember', 'false') == 'true') {
 223                 $cookie = hash_encrypt($sess['password']);
 224                 setcookie('ORGaccess', $cookie, (time() + 25920000), '/', '', 0);
 225                 if ($logger && S::i('auth_by_cookie') != $uid) {
 226                     $logger->log("cookie_on");
 227                 }
 228             } else {
 229                 setcookie('ORGaccess', '', time() - 3600, '/', '', 0);
 230                 if ($logger) {
 231                     $logger->log("cookie_off");
 232                 }
 233             }
 234         }
 235
 236         // Finalizes the session setup.
 237         $this->makePerms($perms);
 238         $this->securityChecks();
 239         $this->setSkin();
 240         $this->updateNbNotifs();
 241         check_redirect();
 242
 243         // We should not have to use this private data anymore
 244         S::kill('auth_by_cookie');
 245         return true;
 246     }
 247
 248     private function securityChecks()
 249     {
 250         $mail_subject = array();
 251         if (check_account()) {
 252             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 253         }
 254         if (check_ip('unsafe')) {
 255             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 256             if (check_ip('ban')) {
 257                 send_warning_mail(implode(' - ', $mail_subject));
 258                 $this->destroy();
 259                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 260                                     . 'Merci de contacter au plus vite '
 261                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 262                 return false;
 263             }
 264         }
 265         if (count($mail_subject)) {
 266             send_warning_mail(implode(' - ', $mail_subject));
 267         }
 268     }
 269
 270     public function tokenAuth($login, $token)
 271     {
 272         // FIXME: we broke the session here because some RSS feeds (mainly wiki feeds) require
 273         // a valid nome and checks the permissions. When the PlUser object will be ready, we'll
 274         // be able to return a simple 'PlUser' object here without trying to alterate the
 275         // session.
 276         $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
 277                              FROM  aliases         AS a
 278                        INNER JOIN  auth_user_md5   AS u ON (a.id = u.user_id AND u.perms IN ("admin", "user"))
 279                        INNER JOIN  auth_user_quick AS q ON (a.id = q.user_id AND q.core_rss_hash = {?})
 280                             WHERE  a.alias = {?} AND a.type != "homonyme"', $token, $login);
 281         if ($res->numRows() == 1) {
 282             $sess = $res->fetchOneAssoc();
 283             if (!S::has('uid')) {
 284                 $_SESSION = $sess;
 285                 $this->makePerms($sess['perms']);
 286                 return S::i('uid');
 287             } else if (S::i('uid') == $sess['uid']) {
 288                 return S::i('uid');
 289             } else {
 290                 Platal::page()->kill('Invalid state. To be fixed when hruid is ready');
 291             }
 292         }
 293         return null;
 294     }
 295
 296     public function makePerms($perm)
 297     {
 298         $flags = new PlFlagSet();
 299         if ($perm == 'disabled' || $perm == 'ext') {
 300             S::set('perms', $flags);
 301             return;
 302         }
 303         $flags->addFlag(PERMS_USER);
 304         if ($perm == 'admin') {
 305             $flags->addFlag(PERMS_ADMIN);
 306         }
 307         S::set('perms', $flags);
 308     }
 309
 310     public function setSkin()
 311     {
 312         global $globals;
 313         if (S::logged() && (!S::has('skin') || S::has('suid'))) {
 314             $uid = S::v('uid');
 315             $res = XDB::query("SELECT  skin_tpl
 316                                  FROM  auth_user_quick AS a
 317                            INNER JOIN  skins           AS s ON a.skin = s.id
 318                                 WHERE  user_id = {?} AND skin_tpl != ''", $uid);
 319             S::set('skin', $res->fetchOneCell());
 320         }
 321     }
 322
 323     public function loggedLevel()
 324     {
 325         return AUTH_COOKIE;
 326     }
 327
 328     public function sureLevel()
 329     {
 330         return AUTH_MDP;
 331     }
 332
 333
 334     public function updateNbNotifs()
 335     {
 336         require_once 'notifs.inc.php';
 337         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 338         S::set('notifs', $n->numRows());
 339     }
 340 }
 341
 342 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 343 ?>