classes/xorgsession.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2010 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 uid 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.uid = 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:$password:" . S::v('challenge'));
  89             /* Deprecates len(password) > 10 conversion. */
  90             if ($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::getSilentWithUID(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($uname)) ? 'uid' : 'alias');
 157         if (!is_null($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::getSilentWithUID($uid);
 179     }
 180
 181     protected function startSessionAs($user, $level)
 182     {
 183         if ((!is_null(S::user()) && S::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         // Loads uid and hruid into the session for developement conveniance.
 194         $_SESSION = array_merge($_SESSION, array('uid' => $user->id(), 'hruid' => $user->hruid));
 195
 196         // Starts the session's logger, and sets up the permanent cookie.
 197         if (S::suid()) {
 198             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 199         } else {
 200             S::logger()->saveLastSession();
 201             Cookie::set('uid', $user->id(), 300);
 202
 203             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 204                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 205             } else {
 206                 $this->killAccessCookie();
 207             }
 208         }
 209
 210         // Finalizes the session setup.
 211         $this->makePerms($user->perms, $user->is_admin);
 212         $this->securityChecks();
 213         $this->setSkin();
 214         $this->updateNbNotifs();
 215         check_redirect();
 216
 217         // We should not have to use this private data anymore
 218         S::kill('auth_by_cookie');
 219         return true;
 220     }
 221
 222     private function securityChecks()
 223     {
 224         $mail_subject = array();
 225         if (check_account()) {
 226             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 227         }
 228         if (check_ip('unsafe')) {
 229             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 230             if (check_ip('ban')) {
 231                 send_warning_mail(implode(' - ', $mail_subject));
 232                 $this->destroy();
 233                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 234                                     . 'Merci de contacter au plus vite '
 235                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 236                 return false;
 237             }
 238         }
 239         if (count($mail_subject)) {
 240             send_warning_mail(implode(' - ', $mail_subject));
 241         }
 242     }
 243
 244     public function tokenAuth($login, $token)
 245     {
 246         $res = XDB::query('SELECT  a.uid, a.hruid
 247                              FROM  aliases  AS l
 248                        INNER JOIN  accounts AS a ON (l.uid = a.uid AND a.state = \'active\')
 249                             WHERE  a.token = {?} AND l.alias = {?} AND l.type != \'homonyme\'',
 250                            $token, $login);
 251         if ($res->numRows() == 1) {
 252             return new User(null, $res->fetchOneAssoc());
 253         }
 254         return null;
 255     }
 256
 257     protected function makePerms($perm, $is_admin)
 258     {
 259         S::set('perms', User::makePerms($perm, $is_admin));
 260     }
 261
 262     public function setSkin()
 263     {
 264         if (S::logged() && (!S::has('skin') || S::suid())) {
 265             $res = XDB::query('SELECT  skin_tpl
 266                                  FROM  accounts AS a
 267                            INNER JOIN  skins    AS s on (a.skin = s.id)
 268                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 269             S::set('skin', $res->fetchOneCell());
 270         }
 271     }
 272
 273     public function loggedLevel()
 274     {
 275         return AUTH_COOKIE;
 276     }
 277
 278     public function sureLevel()
 279     {
 280         return AUTH_MDP;
 281     }
 282
 283
 284     public function updateNbNotifs()
 285     {
 286         require_once 'notifs.inc.php';
 287         $user = S::user();
 288         $n = Watch::getCount($user);
 289         S::set('notifs', $n);
 290     }
 291
 292     public function setAccessCookie($replace = false, $log = true) {
 293         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 294             return;
 295         }
 296         Cookie::set('access', sha1(S::user()->password()), 300, true);
 297         if ($log) {
 298             S::logger()->log('cookie_on');
 299         }
 300     }
 301
 302     public function killAccessCookie($log = true) {
 303         Cookie::kill('access');
 304         if ($log) {
 305             S::logger()->log('cookie_off');
 306         }
 307     }
 308
 309     public function killLoginFormCookies() {
 310         Cookie::kill('uid');
 311         Cookie::kill('domain');
 312     }
 313 }
 314
 315 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 316 ?>