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, $login_type)
  81     {
  82         if ($login_type == 'alias') {
  83             $res = XDB::query('SELECT  a.uid, a.password
  84                                  FROM  accounts AS a
  85                            INNER JOIN  aliases  AS l ON (l.uid = a.uid AND l.type != \'homonyme\')
  86                                 WHERE  l.alias = {?} AND a.state = \'active\'',
  87                               $login);
  88         } else {
  89             $res = XDB::query('SELECT  uid, password
  90                                  FROM  accounts
  91                                 WHERE  ' . $login_type . ' = {?}',
  92                               $login);
  93         }
  94         if (list($uid, $password) = $res->fetchOneRow()) {
  95             $expected_response = sha1("$uname:$password:" . S::v('challenge'));
  96             /* Deprecates len(password) > 10 conversion. */
  97             if ($response != $expected_response) {
  98                 if (!S::logged()) {
  99                     Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
 100                 } else {
 101                     Platal::page()->trigError('Mot de passe invalide');
 102                 }
 103                 S::logger($uid)->log('auth_fail', 'bad password');
 104                 return null;
 105             }
 106             return $uid;
 107         }
 108         Platal::page()->trigError('Mot de passe ou nom d\'utilisateur invalide');
 109         return null;
 110     }
 111
 112
 113     /** Check auth.
 114      */
 115     protected function doAuth($level)
 116     {
 117         global $globals;
 118
 119         /* Cookie authentication
 120          */
 121         if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
 122             $this->tryCookie();
 123         }
 124         if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
 125             if (!S::logged()) {
 126                 S::set('auth', AUTH_COOKIE);
 127             }
 128             return User::getSilentWithUID(S::i('auth_by_cookie'));
 129         }
 130
 131
 132         /* We want to do auth... we must have infos from a form.
 133          */
 134         if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
 135             return null;
 136         }
 137
 138         /** We come from an authentication form.
 139          */
 140         if (S::suid()) {
 141             $login = $uname = S::suid('uid');
 142             $loginType = 'uid';
 143             $redirect = false;
 144         } else {
 145             $uname = Post::v('username');
 146             if (Post::s('domain') == "alias") {
 147                 $res = XDB::query('SELECT  redirect
 148                                      FROM  virtual
 149                                INNER JOIN  virtual_redirect USING(vid)
 150                                     WHERE  alias LIKE {?}',
 151                                    $uname . '@' . $globals->mail->alias_dom);
 152                 $redirect = $res->fetchOneCell();
 153                 if ($redirect) {
 154                     $login = substr($redirect, 0, strpos($redirect, '@'));
 155                 } else {
 156                     $login = '';
 157                 }
 158                 $loginType = 'alias';
 159             } else if (Post::s('domain') == "ax") {
 160                 $login = $uname;
 161                 $redirect = false;
 162                 $loginType = 'hruid';
 163             } else {
 164                 $login = $uname;
 165                 $redirect = false;
 166                 $loginType = is_numeric($uname) ? 'uid' : 'alias';
 167             }
 168         }
 169
 170         $uid = $this->checkPassword($uname, $login, Post::v('response'), $loginType);
 171         if (!is_null($uid) && S::suid()) {
 172             if (S::suid('uid') == $uid) {
 173                 $uid = S::i('uid');
 174             } else {
 175                 $uid = null;
 176             }
 177         }
 178         if (!is_null($uid)) {
 179             S::set('auth', AUTH_MDP);
 180             if (!S::suid()) {
 181                 if (Post::has('domain')) {
 182                     $domain = Post::v('domain', 'login');
 183                     if ($domain == 'alias') {
 184                         Cookie::set('domain', 'alias', 300);
 185                     } else if ($domain == 'ax') {
 186                         Cookie::set('domain', 'ax', 300);
 187                     } else {
 188                         Cookie::kill('domain');
 189                     }
 190                 }
 191             }
 192             S::kill('challenge');
 193             S::logger($uid)->log('auth_ok');
 194         }
 195         return User::getSilentWithUID($uid);
 196     }
 197
 198     protected function startSessionAs($user, $level)
 199     {
 200         if ((!is_null(S::user()) && S::user()->id() != $user->id())
 201             || (S::has('uid') && S::i('uid') != $user->id())) {
 202             return false;
 203         } else if (S::has('uid')) {
 204             return true;
 205         }
 206         if ($level == AUTH_SUID) {
 207             S::set('auth', AUTH_MDP);
 208         }
 209
 210         // Loads uid and hruid into the session for developement conveniance.
 211         $_SESSION = array_merge($_SESSION, array('uid' => $user->id(), 'hruid' => $user->hruid, 'token' => $user->token, 'user' => $user));
 212
 213         // Starts the session's logger, and sets up the permanent cookie.
 214         if (S::suid()) {
 215             S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
 216         } else {
 217             S::logger()->saveLastSession();
 218             Cookie::set('uid', $user->id(), 300);
 219
 220             if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
 221                 $this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
 222             } else {
 223                 $this->killAccessCookie();
 224             }
 225         }
 226
 227         // Finalizes the session setup.
 228         $this->makePerms($user->perms, $user->is_admin);
 229         $this->securityChecks();
 230         $this->setSkin();
 231         $this->updateNbNotifs();
 232         check_redirect();
 233
 234         // We should not have to use this private data anymore
 235         S::kill('auth_by_cookie');
 236         return true;
 237     }
 238
 239     private function securityChecks()
 240     {
 241         $mail_subject = array();
 242         if (check_account()) {
 243             $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
 244         }
 245         if (check_ip('unsafe')) {
 246             $mail_subject[] = 'Une IP surveillee a tente de se connecter';
 247             if (check_ip('ban')) {
 248                 send_warning_mail(implode(' - ', $mail_subject));
 249                 $this->destroy();
 250                 Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
 251                                     . 'Merci de contacter au plus vite '
 252                                     . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
 253                 return false;
 254             }
 255         }
 256         if (count($mail_subject)) {
 257             send_warning_mail(implode(' - ', $mail_subject));
 258         }
 259     }
 260
 261     public function tokenAuth($login, $token)
 262     {
 263         $res = XDB::query('SELECT  a.uid, a.hruid
 264                              FROM  accounts AS a
 265                             WHERE  a.token = {?} AND a.hruid = {?} AND a.state = \'active\'',
 266                           $token, $login);
 267         if ($res->numRows() == 1) {
 268             return new User(null, $res->fetchOneAssoc());
 269         }
 270         return null;
 271     }
 272
 273     protected function makePerms($perm, $is_admin)
 274     {
 275         S::set('perms', User::makePerms($perm, $is_admin));
 276     }
 277
 278     public function setSkin()
 279     {
 280         if (S::logged() && (!S::has('skin') || S::suid())) {
 281             $res = XDB::query('SELECT  skin_tpl
 282                                  FROM  accounts AS a
 283                            INNER JOIN  skins    AS s on (a.skin = s.id)
 284                                 WHERE  a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
 285             S::set('skin', $res->fetchOneCell());
 286         }
 287     }
 288
 289     public function loggedLevel()
 290     {
 291         return AUTH_COOKIE;
 292     }
 293
 294     public function sureLevel()
 295     {
 296         return AUTH_MDP;
 297     }
 298
 299
 300     public function updateNbNotifs()
 301     {
 302         require_once 'notifs.inc.php';
 303         $user = S::user();
 304         $n = Watch::getCount($user);
 305         S::set('notifs', $n);
 306     }
 307
 308     public function setAccessCookie($replace = false, $log = true) {
 309         if (S::suid() || ($replace && !Cookie::blank('access'))) {
 310             return;
 311         }
 312         Cookie::set('access', sha1(S::user()->password()), 300, true);
 313         if ($log) {
 314             S::logger()->log('cookie_on');
 315         }
 316     }
 317
 318     public function killAccessCookie($log = true) {
 319         Cookie::kill('access');
 320         if ($log) {
 321             S::logger()->log('cookie_off');
 322         }
 323     }
 324
 325     public function killLoginFormCookies() {
 326         Cookie::kill('uid');
 327         Cookie::kill('domain');
 328     }
 329 }
 330
 331 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 332 ?>