tryCookie()) {
case self::COOKIE_SUCCESS:
if (!$this->start(AUTH_COOKIE)) {
return false;
}
break;
case self::INVALID_USER:
case self::INVALID_COOKIE:
return false;
}
}
if ((check_ip('dangerous') && S::has('uid')) || check_account()) {
S::logger()->log("view_page", $_SERVER['REQUEST_URI']);
}
return true;
}
/** Check the cookie and set the associated uid in the auth_by_cookie session variable.
*/
private function tryCookie()
{
S::kill('auth_by_cookie');
if (Cookie::v('access') == '' || !Cookie::has('uid')) {
return self::NO_COOKIE;
}
$res = XDB::query('SELECT uid, password
FROM accounts
WHERE uid = {?} AND state = \'active\'',
Cookie::i('uid'));
if ($res->numRows() != 0) {
list($uid, $password) = $res->fetchOneRow();
if (sha1($password) == Cookie::v('access')) {
S::set('auth_by_cookie', $uid);
return self::COOKIE_SUCCESS;
} else {
return self::INVALID_COOKIE;
}
}
return self::INVALID_USER;
}
const TEXT_INVALID_LOGIN = "Mot de passe ou nom d'utilisateur invalide";
const TEXT_INVALID_PASS = "Mot de passe invalide";
private function checkPassword($login, User $user, $response)
{
if ($user === null) {
Platal::page()->trigError(self::TEXT_INVALID_LOGIN);
return false;
} else {
$password = $user->password();
$expected_response = sha1("$login:$password:" . S::v('challenge'));
/* Deprecates len(password) > 10 conversion. */
if ($response != $expected_response) {
if (!S::logged()) {
Platal::page()->trigError(self::TEXT_INVALID_LOGIN);
} else {
Platal::page()->trigError(self::TEXT_INVALID_PASS);
}
S::logger($uid)->log('auth_fail', 'bad password');
return false;
}
return true;
}
}
/** Check auth.
*/
protected function doAuth($level)
{
global $globals;
/* Cookie authentication
*/
if ($level == AUTH_COOKIE && !S::has('auth_by_cookie')) {
$this->tryCookie();
}
if ($level == AUTH_COOKIE && S::has('auth_by_cookie')) {
if (!S::logged()) {
S::set('auth', AUTH_COOKIE);
}
return User::getSilentWithUID(S::i('auth_by_cookie'));
}
/* We want to do auth... we must have infos from a form.
*/
if (!Post::has('username') || !Post::has('response') || !S::has('challenge')) {
return null;
}
/** We come from an authentication form.
*/
if (S::suid()) {
$login = S::suid('uid');
} else {
$login = Post::v('username');
}
$user = User::getSilent($login);
if (is_null($user)) {
Platal::page()->trigError(self::TEXT_INVALID_LOGIN);
$success = false;
} else {
if (S::suid()) {
$success = (S::suid('uid') == $user->id());
} else {
$success = $this->checkPassword($login, $user, Post::v('response'));
}
}
if ($success) {
S::set('auth', AUTH_PASSWD);
S::kill('challenge');
S::logger($user->id())->log('auth_ok');
}
return $user;
}
protected function startSessionAs($user, $level)
{
if ((!is_null(S::user()) && S::user()->id() != $user->id())
|| (S::has('uid') && S::i('uid') != $user->id())) {
return false;
} else if (S::has('uid')) {
return true;
}
if ($level == AUTH_SUID) {
S::set('auth', AUTH_PASSWD);
}
// Loads uid and hruid into the session for developement conveniance.
$_SESSION = array_merge($_SESSION, array('uid' => $user->id(), 'hruid' => $user->hruid, 'token' => $user->token, 'user' => $user));
// Starts the session's logger, and sets up the permanent cookie.
if (S::suid()) {
S::logger()->log("suid_start", S::v('hruid') . ' by ' . S::suid('hruid'));
} else {
S::logger()->saveLastSession();
Cookie::set('uid', $user->id(), 300);
if (S::i('auth_by_cookie') == $user->id() || Post::v('remember', 'false') == 'true') {
$this->setAccessCookie(false, S::i('auth_by_cookie') != $user->id());
} else {
$this->killAccessCookie();
}
}
// Finalizes the session setup.
$this->makePerms($user->perms, $user->is_admin);
$this->securityChecks();
$this->setSkin();
$this->updateNbNotifs();
// Only check email redirection for 'internal' users.
if ($user->checkPerms(PERMS_USER)) {
check_redirect();
}
// We should not have to use this private data anymore
S::kill('auth_by_cookie');
return true;
}
private function securityChecks()
{
$mail_subject = array();
if (check_account()) {
$mail_subject[] = 'Connexion d\'un utilisateur surveillé';
}
if (check_ip('unsafe')) {
$mail_subject[] = 'Une IP surveillee a tente de se connecter';
if (check_ip('ban')) {
send_warning_mail(implode(' - ', $mail_subject));
$this->destroy();
Platal::page()->kill('Une erreur est survenue lors de la procédure d\'authentification. '
. 'Merci de contacter au plus vite '
. 'support@polytechnique.org');
return false;
}
}
if (count($mail_subject)) {
send_warning_mail(implode(' - ', $mail_subject));
}
}
/**
* The authentication schema is based on three query parameters:
* ?user=×tamp=&sig=
* where:
* - hruid is the hruid of the querying user
* - timestamp is the current UNIX timestamp, which has to be within a
* given distance of the server-side UNIX timestamp
* - sig is the HMAC of "###" using
* a known secret of the user as the key.
*
* At the moment, the shared secret of the user is the sha1 hash of its
* password. This is temporary, though, until better support for tokens is
* implemented in plat/al.
* TODO(vzanotti): Switch to dedicated secrets for authentication.
*/
public function apiAuth($method, $resource, $payload)
{
// Verify that the timestamp is within acceptable bounds.
$timestamp = Env::i('timestamp', 0);
if (abs($timestamp - time()) > Platal::globals()->api->timestamp_tolerance) {
return null;
}
// Retrieve the user corresponding to the forlife. Note that at the
// moment, other aliases are also accepted.
$user = User::getSilent(Env::s('user', ''));
if (is_null($user) || !$user->isActive()) {
return null;
}
// Determine the list of tokens associated with the user. At the moment,
// this is just the sha1 of the password.
$tokens = array($user->password());
// For each token, try to validate the signature.
$message = implode('#', array($method, $resource, $payload, $timestamp));
$signature = Env::s('sig');
foreach ($tokens as $token) {
$expected_signature = hash_hmac(
Platal::globals()->api->hmac_algo, $message, $token);
if ($signature == $expected_signature) {
return $user;
}
}
return null;
}
public function tokenAuth($login, $token)
{
$res = XDB::query('SELECT a.uid, a.hruid
FROM accounts AS a
WHERE a.token = {?} AND a.hruid = {?} AND a.state = \'active\'',
$token, $login);
if ($res->numRows() == 1) {
return new User(null, $res->fetchOneAssoc());
}
return null;
}
protected function makePerms($perm, $is_admin)
{
S::set('perms', User::makePerms($perm, $is_admin));
}
public function setSkin()
{
if (S::logged() && (!S::has('skin') || S::suid())) {
$res = XDB::query('SELECT skin_tpl
FROM accounts AS a
INNER JOIN skins AS s on (a.skin = s.id)
WHERE a.uid = {?} AND skin_tpl != \'\'', S::i('uid'));
S::set('skin', $res->fetchOneCell());
}
}
public function loggedLevel()
{
return AUTH_COOKIE;
}
public function sureLevel()
{
return AUTH_PASSWD;
}
public function updateNbNotifs()
{
require_once 'notifs.inc.php';
$user = S::user();
$n = Watch::getCount($user);
S::set('notifs', $n);
}
public function setAccessCookie($replace = false, $log = true) {
if (S::suid() || ($replace && !Cookie::blank('access'))) {
return;
}
Cookie::set('access', sha1(S::user()->password()), 300, true);
if ($log) {
S::logger()->log('cookie_on');
}
}
public function killAccessCookie($log = true) {
Cookie::kill('access');
if ($log) {
S::logger()->log('cookie_off');
}
}
public function killLoginFormCookies() {
Cookie::kill('uid');
Cookie::kill('domain');
}
}
// vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
?>