2 /***************************************************************************
3 * Copyright (C) 2003-2013 Polytechnique.org *
4 * http://opensource.polytechnique.org/ *
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. *
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. *
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 *
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
20 ***************************************************************************/
22 class XorgSession
extends PlSession
24 const INVALID_USER
= -2;
26 const COOKIE_SUCCESS
= 0;
27 const INVALID_COOKIE
= 1;
29 public function __construct()
31 parent
::__construct();
34 public function startAvailableAuth()
37 switch ($this->tryCookie()) {
38 case self
::COOKIE_SUCCESS
:
39 if (!$this->start(AUTH_COOKIE
)) {
44 case self
::INVALID_USER
:
45 case self
::INVALID_COOKIE
:
49 if ((check_ip('dangerous') && S
::has('uid')) ||
check_account()) {
50 S
::logger()->log("view_page", $_SERVER['REQUEST_URI']);
55 /** Check the cookie and set the associated uid in the auth_by_cookie session variable.
57 private function tryCookie()
59 S
::kill('auth_by_cookie');
60 if (Cookie
::v('access') == '' ||
!Cookie
::has('uid')) {
61 return self
::NO_COOKIE
;
64 $res = XDB
::query('SELECT uid, password
66 WHERE uid = {?} AND state = \'active\'',
68 if ($res->numRows() != 0) {
69 list($uid, $password) = $res->fetchOneRow();
70 if (sha1($password) == Cookie
::v('access')) {
71 S
::set('auth_by_cookie', $uid);
72 return self
::COOKIE_SUCCESS
;
74 return self
::INVALID_COOKIE
;
77 return self
::INVALID_USER
;
80 const TEXT_INVALID_LOGIN
= "Mot de passe ou nom d'utilisateur invalide";
81 const TEXT_INVALID_PASS
= "Mot de passe invalide";
83 private function checkPassword($login, User
$user, $response)
86 Platal
::page()->trigError(self
::TEXT_INVALID_LOGIN
);
89 $password = $user->password();
90 $expected_response = sha1("$login:$password:" . S
::v('challenge'));
91 /* Deprecates len(password) > 10 conversion. */
92 if ($response != $expected_response) {
94 Platal
::page()->trigError(self
::TEXT_INVALID_LOGIN
);
96 Platal
::page()->trigError(self
::TEXT_INVALID_PASS
);
98 S
::logger($uid)->log('auth_fail', 'bad password');
108 protected function doAuth($level)
112 /* Cookie authentication
114 if ($level == AUTH_COOKIE
&& !S
::has('auth_by_cookie')) {
117 if ($level == AUTH_COOKIE
&& S
::has('auth_by_cookie')) {
119 S
::set('auth', AUTH_COOKIE
);
121 return User
::getSilentWithUID(S
::i('auth_by_cookie'));
125 /* We want to do auth... we must have infos from a form.
127 if (!Post
::has('username') ||
!Post
::has('response') ||
!S
::has('challenge')) {
131 /** We come from an authentication form.
134 $login = S
::suid('uid');
136 $login = Post
::v('username');
139 $user = User
::getSilent($login);
141 if (is_null($user)) {
142 Platal
::page()->trigError(self
::TEXT_INVALID_LOGIN
);
146 $success = (S
::suid('uid') == $user->id());
148 $success = $this->checkPassword($login, $user, Post
::v('response'));
153 S
::set('auth', AUTH_PASSWD
);
154 S
::kill('challenge');
155 S
::logger($user->id())->log('auth_ok');
160 protected function startSessionAs($user, $level)
162 if ((!is_null(S
::user()) && S
::user()->id() != $user->id())
163 ||
(S
::has('uid') && S
::i('uid') != $user->id())) {
165 } else if (S
::has('uid')) {
168 if ($level == AUTH_SUID
) {
169 S
::set('auth', AUTH_PASSWD
);
172 // Loads uid and hruid into the session for developement conveniance.
173 $_SESSION = array_merge($_SESSION, array('uid' => $user->id(), 'hruid' => $user->hruid
, 'token' => $user->token
, 'user' => $user));
175 // Starts the session's logger, and sets up the permanent cookie.
177 S
::logger()->log("suid_start", S
::v('hruid') . ' by ' . S
::suid('hruid'));
179 S
::logger()->saveLastSession();
180 Cookie
::set('uid', $user->id(), 300);
182 if (S
::i('auth_by_cookie') == $user->id() || Post
::v('remember', 'false') == 'true') {
183 $this->setAccessCookie(false
, S
::i('auth_by_cookie') != $user->id());
185 $this->killAccessCookie();
187 // If login for an external website and not activating cookie,
188 // mark that we want to disconnect once external auth checks
189 // have been performed.
190 if (Post
::b('external_auth')) {
191 S
::set('external_auth_exit', true
);
196 // Finalizes the session setup.
197 $this->makePerms($user->perms
, $user->is_admin
);
198 $this->securityChecks();
200 $this->updateNbNotifs();
201 // Only check email redirection for 'internal' users.
202 if ($user->checkPerms(PERMS_USER
)) {
206 // We should not have to use this private data anymore
207 S
::kill('auth_by_cookie');
211 private function securityChecks()
213 $mail_subject = array();
214 if (check_account()) {
215 $mail_subject[] = 'Connexion d\'un utilisateur surveillé';
217 if (check_ip('unsafe')) {
218 $mail_subject[] = 'Une IP surveillee a tente de se connecter';
219 if (check_ip('ban')) {
220 send_warning_mail(implode(' - ', $mail_subject));
222 Platal
::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
223 . 'Merci de contacter au plus vite '
224 . '<a href="mailto:support@polytechnique.org">support@polytechnique.org</a>');
228 if (count($mail_subject)) {
229 send_warning_mail(implode(' - ', $mail_subject));
234 * The authentication schema is based on three query parameters:
235 * ?user=<hruid>×tamp=<timestamp>&sig=<sig>
237 * - hruid is the hruid of the querying user
238 * - timestamp is the current UNIX timestamp, which has to be within a
239 * given distance of the server-side UNIX timestamp
240 * - sig is the HMAC of "<method>#<resource>#<payload>#<timestamp>" using
241 * a known secret of the user as the key.
243 * At the moment, the shared secret of the user is the sha1 hash of its
244 * password. This is temporary, though, until better support for tokens is
245 * implemented in plat/al.
246 * TODO(vzanotti): Switch to dedicated secrets for authentication.
248 public function apiAuth($method, $resource, $payload)
250 // Verify that the timestamp is within acceptable bounds.
251 $timestamp = Env
::i('timestamp', 0);
252 if (abs($timestamp - time()) > Platal
::globals()->api
->timestamp_tolerance
) {
256 // Retrieve the user corresponding to the forlife. Note that at the
257 // moment, other aliases are also accepted.
258 $user = User
::getSilent(Env
::s('user', ''));
259 if (is_null($user) ||
!$user->isActive()) {
263 // Determine the list of tokens associated with the user. At the moment,
264 // this is just the sha1 of the password.
265 $tokens = array($user->password());
267 // For each token, try to validate the signature.
268 $message = implode('#', array($method, $resource, $payload, $timestamp));
269 $signature = Env
::s('sig');
270 foreach ($tokens as $token) {
271 $expected_signature = hash_hmac(
272 Platal
::globals()->api
->hmac_algo
, $message, $token);
273 if ($signature == $expected_signature) {
281 public function tokenAuth($login, $token)
283 $res = XDB
::query('SELECT a.uid, a.hruid
285 WHERE a.token = {?} AND a.hruid = {?} AND a.state = \'active\'',
287 if ($res->numRows() == 1) {
288 return new User(null
, $res->fetchOneAssoc());
293 protected function makePerms($perm, $is_admin)
295 S
::set('perms', User
::makePerms($perm, $is_admin));
298 public function setSkin()
300 if (S
::logged() && (!S
::has('skin') || S
::suid())) {
301 $res = XDB
::query('SELECT skin_tpl
303 INNER JOIN skins AS s on (a.skin = s.id)
304 WHERE a.uid = {?} AND skin_tpl != \'\'', S
::i('uid'));
305 S
::set('skin', $res->fetchOneCell());
309 public function loggedLevel()
314 public function sureLevel()
320 public function updateNbNotifs()
322 require_once 'notifs.inc.php';
324 $n = Watch
::getCount($user);
325 S
::set('notifs', $n);
328 public function setAccessCookie($replace = false
, $log = true
) {
329 if (S
::suid() ||
($replace && !Cookie
::blank('access'))) {
332 Cookie
::set('access', sha1(S
::user()->password()), 300, true
);
334 S
::logger()->log('cookie_on');
338 public function killAccessCookie($log = true
) {
339 Cookie
::kill('access');
341 S
::logger()->log('cookie_off');
345 public function killLoginFormCookies() {
347 Cookie
::kill('domain');
351 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: