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     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             S::logger()->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('access') == '' || !Cookie::has('uid')) {
  51             return -1;
  52         }
  53
  54         $res = XDB::query('SELECT  user_id, password
  55                              FROM  auth_user_md5
  56                             WHERE  user_id = {?} AND perms IN(\'admin\', \'user\')',
  57                          Cookie::i('uid'));
  58         if ($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('access')) {
  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 != $expected_response && Env::has('xorpass')
  83                 && !preg_match('/^0*$/', Env::v('xorpass'))) {
  84                 $new_password = hash_xor(Env::v('xorpass'), $password);
  85                 $expected_response = hash_encrypt("$uname:$new_password:" . S::v('challenge'));
  86                 if ($response == $expected_response) {
  87                     XDB::execute('UPDATE  auth_user_md5
  88                                      SET  password = {?}
  89                                    WHERE  user_id = {?}',
  90                                  $new_password, $uid);
  91
  92                     // Update the GoogleApps password as well, if required.
  93                     global $globals;
  94                     if ($globals->mailstorage->googleapps_domain) {
  95                         require_once 'googleapps.inc.php';
  96                         $user = User::getSilent($uid);
  97                         $account = new GoogleAppsAccount($user);
  98                         if ($account->active() && $account->sync_password) {
  99                             $account->set_password($new_password);
 100                         }
 101                     }
 102                 }
 103             }
 104             if ($response != $expected_response) {
 105                 if (!S::logged()) {
 106                     Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
 107                 } else {
 108                     Platal::page()->trigError('Mot de passe invalide');
 109                 }
 110                 S::logger($uid)->log('auth_fail', 'bad password');
 111                 return null;
 112             }
 113             return $uid;
 114         }
 115         Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
 116         return null;
 117     }
 118
 119
 120     /** Check auth.
 121      */
 122     protected function doAuth($level)
 123     {
 124         global $globals;
 125
 126         /* Cookie authentication
 127          */
 128         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 129             $this->tryCookie();
 130         }
 131         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 132             if (!S::logged()) {
 133                 S::set('auth', AUTH_COOKIE);
 134             }
 135             return S::i('auth_by_cookie');
 136         }
 137
 138
 139         /* We want to do auth... we must have infos from a form.
 140          */
 141         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 142             return null;
 143         }
 144
 145         /** We come from an authentication form.
 146          */
 147         if (S::has('suid')) {
 148             $suid  = S::v('suid');
 149             $login = $uname = $suid['uid'];
 150             $redirect = false;
 151         } else {
 152             $uname = Env::v('username');
 153             if (Env::v('domain') == "alias") {
 154                 $res = XDB::query('SELECT  redirect
 155                                      FROM  virtual
 156                                INNER JOIN  virtual_redirect USING(vid)
 157                                     WHERE  alias LIKE {?}',
 158                                    $uname . '@' . $globals->mail->alias_dom);
 159                 $redirect = $res->fetchOneCell();
 160                 if ($redirect) {
 161                     $login = substr($redirect, 0, strpos($redirect, '@'));
 162                 } else {
 163                     $login = '';
 164                 }
 165             } else {
 166                 $login = $uname;
 167                 $redirect = false;
 168             }
 169         }
 170
 171         $uid = $this->checkPassword($uname, $login, Post::v('response'), (!$redirect && is_numeric($uname)) ? 'id' : 'alias');
 172         if (!is_null($uid) && S::has('suid')) {
 173             $suid = S::v('suid');
 174             if ($suid['uid'] == $uid) {
 175                 $uid = S::i('uid');
 176             } else {
 177                 $uid = null;
 178             }
 179         }
 180         if (!is_null($uid)) {
 181             S::set('auth', AUTH_MDP);
 182             if (!S::has('suid')) {
 183                 if (Post::has('domain')) {
 184                     if (($domain = Post::v('domain', 'login')) == 'alias') {
 185                         Cookie::set('domain', 'alias', 300);
 186                     } else {
 187                         Cookie::kill('domain');
 188                     }
 189                 }
 190             }
 191             S::kill('challenge');
 192             S::logger($uid)->log('auth_ok');
 193         }
 194         return $uid;
 195     }
 196
 197     protected function startSessionAs($uid, $level)
 198     {
 199         if ((!is_null(S::v('user')) && S::i('user') != $uid) || (S::has('uid') && S::i('uid') != $uid)) {
 200             return false;
 201         } else if (S::has('uid')) {
 202             return true;
 203         }
 204         if ($level == AUTH_SUID) {
 205             S::set('auth', AUTH_MDP);
 206         }
 207
 208         // Retrieves main user properties.
 209         $res  = XDB::query("SELECT  u.user_id AS uid, u.hruid, prenom, prenom_ini, nom, nom_ini, nom_usage, perms, promo, promo_sortie,
 210                                     matricule, password, FIND_IN_SET('femme', u.flags) AS femme,
 211                                     q.core_mail_fmt AS mail_fmt, UNIX_TIMESTAMP(q.banana_last) AS banana_last, q.watch_last, q.core_rss_hash,
 212                                     FIND_IN_SET('watch', u.flags) AS watch_account, q.last_version, g.g_account_name IS NOT NULL AS googleapps,
 213                                     UNIX_TIMESTAMP(s.start) AS lastlogin, s.host
 214                               FROM  auth_user_md5   AS u
 215                         INNER JOIN  auth_user_quick AS q  USING(user_id)
 216                          LEFT JOIN  gapps_accounts  AS g  ON (u.user_id = g.l_userid AND g.g_status = 'active')
 217                          LEFT JOIN  logger.last_sessions AS ls ON (ls.uid = u.user_id)
 218                          LEFT JOIN  logger.sessions AS s  ON(s.id = ls.id)
 219                              WHERE  u.user_id = {?} AND u.perms IN('admin', 'user')", $uid);
 220         if ($res->numRows() != 1) {
 221             return false;
 222         }
 223
 224         $sess = $res->fetchOneAssoc();
 225         $perms = $sess['perms'];
 226         unset($sess['perms']);
 227
 228         // Loads the data into the real session.
 229         $_SESSION = array_merge($_SESSION, $sess);
 230
 231         // Starts the session's logger, and sets up the permanent cookie.
 232         if (S::has('suid')) {
 233             $suid = S::v('suid');
 234             $logger = S::logger($uid);
 235             $logger->log("suid_start", S::v('hruid') . " by " . $suid['hruid']);
 236         } else {
 237             $logger = S::logger($uid);
 238             $logger->saveLastSession();
 239             Cookie::set('uid', $uid, 300);
 240
 241             if (S::i('auth_by_cookie') == $uid || Post::v('remember', 'false') == 'true') {
 242                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $uid);
 243             } else {
 244                 $this->killAccessCookie();
 245             }
 246         }
 247
 248         // Finalizes the session setup.
 249         S::set('perms', User::makePerms($perms));
 250         $this->securityChecks();
 251         $this->setSkin();
 252         $this->updateNbNotifs();
 253         check_redirect();
 254
 255         // We should not have to use this private data anymore
 256         S::kill('auth_by_cookie');
 257         return true;
 258     }
 259
 260     /** Start a session without authentication data for the given user.
 261      * This is used to identify the user after his registration, to be
 262      * removed after rewriting registration procedure.
 263      * XXX: Temporary
 264      */
 265     public function startWeakSession($user)
 266     {
 267         if (!$this->startSessionAs($user, AUTH_MDP)) {
 268             $this->destroy();
 269             return false;
 270         }
 271         S::set('auth', AUTH_MDP);
 272         return true;
 273     }
 274
 275     private function securityChecks()
 276     {
 277         $mail_subject = array();
 278         if (check_account()) {
 279             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 280         }
 281         if (check_ip('unsafe')) {
 282             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 283             if (check_ip('ban')) {
 284                 send_warning_mail(implode(' - ', $mail_subject));
 285                 $this->destroy();
 286                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 287                                     . 'Merci de contacter au plus vite '
 288                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 289                 return false;
 290             }
 291         }
 292         if (count($mail_subject)) {
 293             send_warning_mail(implode(' - ', $mail_subject));
 294         }
 295     }
 296
 297     public function tokenAuth($login, $token)
 298     {
 299         $res = XDB::query('SELECT  u.hruid
 300                              FROM  aliases         AS a
 301                        INNER JOIN  auth_user_md5   AS u ON (a.id = u.user_id AND u.perms IN ("admin", "user"))
 302                        INNER JOIN  auth_user_quick AS q ON (a.id = q.user_id AND q.core_rss_hash = {?})
 303                             WHERE  a.alias = {?} AND a.type != "homonyme"', $token, $login);
 304         if ($res->numRows() == 1) {
 305             $data = $res->fetchOneAssoc();
 306             return new User($data['hruid'], $data);
 307         }
 308         return null;
 309     }
 310
 311     protected function makePerms($perm, $is_admin)
 312     {
 313         $flags = new PlFlagSet();
 314         if ($perm == 'disabled' || $perm == 'ext') {
 315             S::set('perms', $flags);
 316             return;
 317         }
 318         $flags->addFlag(PERMS_USER);
 319         if ($perm == 'admin') {
 320             $flags->addFlag(PERMS_ADMIN);
 321         }
 322         S::set('perms', $flags);
 323     }
 324
 325     public function setSkin()
 326     {
 327         if (S::logged() && (!S::has('skin') || S::has('suid'))) {
 328             $uid = S::v('uid');
 329             $res = XDB::query("SELECT  skin_tpl
 330                                  FROM  auth_user_quick AS a
 331                            INNER JOIN  skins           AS s ON a.skin = s.id
 332                                 WHERE  user_id = {?} AND skin_tpl != ''", $uid);
 333             S::set('skin', $res->fetchOneCell());
 334         }
 335     }
 336
 337     public function loggedLevel()
 338     {
 339         return AUTH_COOKIE;
 340     }
 341
 342     public function sureLevel()
 343     {
 344         return AUTH_MDP;
 345     }
 346
 347
 348     public function updateNbNotifs()
 349     {
 350         require_once 'notifs.inc.php';
 351         $n = select_notifs(false, S::i('uid'), S::v('watch_last'), false);
 352         S::set('notifs', $n->numRows());
 353     }
 354
 355     public function setAccessCookie($replace = false, $log = true) {
 356         if (S::has('suid') || ($replace && !Cookie::blank('access'))) {
 357             return;
 358         }
 359         require_once('secure_hash.inc.php');
 360         Cookie::set('access', hash_encrypt(S::v('password')), 300, true);
 361         if ($log) {
 362             S::logger()->log('cookie_on');
 363         }
 364     }
 365
 366     public function killAccessCookie($log = true) {
 367         Cookie::kill('access');
 368         if ($log) {
 369             S::logger()->log('cookie_off');
 370         }
 371     }
 372
 373     public function killLoginFormCookies() {
 374         Cookie::kill('uid');
 375         Cookie::kill('domain');
 376     }
 377 }
 378
 379 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 380 ?>