6d1e858aa4
The check for two factor enforcement would return true for non-existing users. This fix makes it return false in order to be able to perform the regular login which will then fail and return false. This prevents throwing PasswordLoginForbidden for non-existing users.
782 lines
22 KiB
PHP
782 lines
22 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bernhard Posselt <dev@bernhard-posselt.com>
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* @author Christoph Wurst <christoph@owncloud.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\User;
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use OC;
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use OC\Authentication\Exceptions\InvalidTokenException;
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use OC\Authentication\Exceptions\PasswordlessTokenException;
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use OC\Authentication\Exceptions\PasswordLoginForbiddenException;
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use OC\Authentication\Token\IProvider;
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use OC\Authentication\Token\IToken;
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use OC\Hooks\Emitter;
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use OC_User;
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use OC_Util;
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use OCA\DAV\Connector\Sabre\Auth;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IConfig;
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use OCP\IRequest;
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use OCP\ISession;
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use OCP\IUser;
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use OCP\IUserManager;
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use OCP\IUserSession;
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use OCP\Session\Exceptions\SessionNotAvailableException;
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use OCP\Util;
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/**
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* Class Session
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*
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* Hooks available in scope \OC\User:
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* - preSetPassword(\OC\User\User $user, string $password, string $recoverPassword)
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* - postSetPassword(\OC\User\User $user, string $password, string $recoverPassword)
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* - preDelete(\OC\User\User $user)
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* - postDelete(\OC\User\User $user)
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* - preCreateUser(string $uid, string $password)
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* - postCreateUser(\OC\User\User $user)
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* - preLogin(string $user, string $password)
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* - postLogin(\OC\User\User $user, string $password)
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* - preRememberedLogin(string $uid)
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* - postRememberedLogin(\OC\User\User $user)
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* - logout()
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*
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* @package OC\User
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*/
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class Session implements IUserSession, Emitter {
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/** @var IUserManager $manager */
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private $manager;
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/** @var ISession $session */
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private $session;
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/** @var ITimeFactory */
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private $timeFacory;
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/** @var IProvider */
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private $tokenProvider;
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/** @var IConfig */
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private $config;
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/** @var User $activeUser */
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protected $activeUser;
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/**
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* @param IUserManager $manager
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* @param ISession $session
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* @param ITimeFactory $timeFacory
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* @param IProvider $tokenProvider
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* @param IConfig $config
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*/
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public function __construct(IUserManager $manager,
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ISession $session,
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ITimeFactory $timeFacory,
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$tokenProvider,
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IConfig $config) {
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$this->manager = $manager;
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$this->session = $session;
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$this->timeFacory = $timeFacory;
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$this->tokenProvider = $tokenProvider;
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$this->config = $config;
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}
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/**
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* @param IProvider $provider
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*/
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public function setTokenProvider(IProvider $provider) {
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$this->tokenProvider = $provider;
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}
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/**
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* @param string $scope
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* @param string $method
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* @param callable $callback
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*/
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public function listen($scope, $method, callable $callback) {
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$this->manager->listen($scope, $method, $callback);
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}
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/**
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* @param string $scope optional
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* @param string $method optional
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* @param callable $callback optional
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*/
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public function removeListener($scope = null, $method = null, callable $callback = null) {
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$this->manager->removeListener($scope, $method, $callback);
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}
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/**
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* get the manager object
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*
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* @return Manager
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*/
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public function getManager() {
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return $this->manager;
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}
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/**
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* get the session object
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*
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* @return ISession
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*/
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public function getSession() {
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return $this->session;
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}
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/**
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* set the session object
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*
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* @param ISession $session
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*/
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public function setSession(ISession $session) {
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if ($this->session instanceof ISession) {
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$this->session->close();
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}
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$this->session = $session;
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$this->activeUser = null;
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}
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/**
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* set the currently active user
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*
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* @param IUser|null $user
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*/
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public function setUser($user) {
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if (is_null($user)) {
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$this->session->remove('user_id');
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} else {
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$this->session->set('user_id', $user->getUID());
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}
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$this->activeUser = $user;
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}
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/**
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* get the current active user
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*
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* @return IUser|null Current user, otherwise null
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*/
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public function getUser() {
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// FIXME: This is a quick'n dirty work-around for the incognito mode as
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// described at https://github.com/owncloud/core/pull/12912#issuecomment-67391155
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if (OC_User::isIncognitoMode()) {
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return null;
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}
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if (is_null($this->activeUser)) {
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$uid = $this->session->get('user_id');
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if (is_null($uid)) {
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return null;
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}
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$this->activeUser = $this->manager->get($uid);
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if (is_null($this->activeUser)) {
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return null;
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}
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$this->validateSession();
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}
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return $this->activeUser;
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}
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/**
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* Validate whether the current session is valid
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*
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* - For token-authenticated clients, the token validity is checked
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* - For browsers, the session token validity is checked
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*/
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protected function validateSession() {
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$token = null;
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$appPassword = $this->session->get('app_password');
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if (is_null($appPassword)) {
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try {
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$token = $this->session->getId();
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} catch (SessionNotAvailableException $ex) {
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return;
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}
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} else {
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$token = $appPassword;
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}
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if (!$this->validateToken($token)) {
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// Session was invalidated
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$this->logout();
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}
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}
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/**
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* Checks whether the user is logged in
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*
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* @return bool if logged in
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*/
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public function isLoggedIn() {
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$user = $this->getUser();
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if (is_null($user)) {
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return false;
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}
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return $user->isEnabled();
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}
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/**
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* set the login name
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*
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* @param string|null $loginName for the logged in user
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*/
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public function setLoginName($loginName) {
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if (is_null($loginName)) {
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$this->session->remove('loginname');
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} else {
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$this->session->set('loginname', $loginName);
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}
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}
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/**
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* get the login name of the current user
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*
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* @return string
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*/
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public function getLoginName() {
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if ($this->activeUser) {
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return $this->session->get('loginname');
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} else {
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$uid = $this->session->get('user_id');
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if ($uid) {
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$this->activeUser = $this->manager->get($uid);
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return $this->session->get('loginname');
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} else {
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return null;
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}
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}
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}
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/**
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* try to log in with the provided credentials
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*
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* @param string $uid
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* @param string $password
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* @return boolean|null
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* @throws LoginException
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*/
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public function login($uid, $password) {
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$this->session->regenerateId();
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if ($this->validateToken($password, $uid)) {
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return $this->loginWithToken($password);
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}
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return $this->loginWithPassword($uid, $password);
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}
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/**
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* Tries to log in a client
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*
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* Checks token auth enforced
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* Checks 2FA enabled
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*
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* @param string $user
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* @param string $password
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* @param IRequest $request
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* @param OC\Security\Bruteforce\Throttler $throttler
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* @throws LoginException
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* @throws PasswordLoginForbiddenException
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* @return boolean
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*/
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public function logClientIn($user,
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$password,
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IRequest $request,
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OC\Security\Bruteforce\Throttler $throttler) {
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$currentDelay = $throttler->sleepDelay($request->getRemoteAddress());
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$isTokenPassword = $this->isTokenPassword($password);
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if (!$isTokenPassword && $this->isTokenAuthEnforced()) {
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throw new PasswordLoginForbiddenException();
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}
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if (!$isTokenPassword && $this->isTwoFactorEnforced($user)) {
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throw new PasswordLoginForbiddenException();
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}
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if (!$this->login($user, $password) ) {
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$users = $this->manager->getByEmail($user);
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if (count($users) === 1) {
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return $this->login($users[0]->getUID(), $password);
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}
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$throttler->registerAttempt('login', $request->getRemoteAddress(), ['uid' => $user]);
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if($currentDelay === 0) {
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$throttler->sleepDelay($request->getRemoteAddress());
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}
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return false;
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}
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if ($isTokenPassword) {
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$this->session->set('app_password', $password);
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} else if($this->supportsCookies($request)) {
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// Password login, but cookies supported -> create (browser) session token
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$this->createSessionToken($request, $this->getUser()->getUID(), $user, $password);
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}
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return true;
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}
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protected function supportsCookies(IRequest $request) {
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if (!is_null($request->getCookie('cookie_test'))) {
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return true;
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}
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setcookie('cookie_test', 'test', $this->timeFacory->getTime() + 3600);
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return false;
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}
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private function isTokenAuthEnforced() {
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return $this->config->getSystemValue('token_auth_enforced', false);
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}
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protected function isTwoFactorEnforced($username) {
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Util::emitHook(
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'\OCA\Files_Sharing\API\Server2Server',
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'preLoginNameUsedAsUserName',
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array('uid' => &$username)
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);
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$user = $this->manager->get($username);
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if (is_null($user)) {
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$users = $this->manager->getByEmail($username);
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if (empty($users)) {
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return false;
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}
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if (count($users) !== 1) {
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return true;
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}
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$user = $users[0];
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}
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// DI not possible due to cyclic dependencies :'-/
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return OC::$server->getTwoFactorAuthManager()->isTwoFactorAuthenticated($user);
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}
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/**
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* Check if the given 'password' is actually a device token
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*
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* @param string $password
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* @return boolean
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*/
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public function isTokenPassword($password) {
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try {
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$this->tokenProvider->getToken($password);
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return true;
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} catch (InvalidTokenException $ex) {
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return false;
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}
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}
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protected function prepareUserLogin() {
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// TODO: mock/inject/use non-static
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// Refresh the token
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\OC::$server->getCsrfTokenManager()->refreshToken();
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//we need to pass the user name, which may differ from login name
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$user = $this->getUser()->getUID();
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OC_Util::setupFS($user);
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//trigger creation of user home and /files folder
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\OC::$server->getUserFolder($user);
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}
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/**
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* Tries to login the user with HTTP Basic Authentication
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*
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* @todo do not allow basic auth if the user is 2FA enforced
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* @param IRequest $request
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* @return boolean if the login was successful
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*/
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public function tryBasicAuthLogin(IRequest $request,
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OC\Security\Bruteforce\Throttler $throttler) {
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if (!empty($request->server['PHP_AUTH_USER']) && !empty($request->server['PHP_AUTH_PW'])) {
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try {
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if ($this->logClientIn($request->server['PHP_AUTH_USER'], $request->server['PHP_AUTH_PW'], $request, $throttler)) {
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/**
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* Add DAV authenticated. This should in an ideal world not be
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* necessary but the iOS App reads cookies from anywhere instead
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* only the DAV endpoint.
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* This makes sure that the cookies will be valid for the whole scope
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* @see https://github.com/owncloud/core/issues/22893
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*/
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$this->session->set(
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Auth::DAV_AUTHENTICATED, $this->getUser()->getUID()
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);
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return true;
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}
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} catch (PasswordLoginForbiddenException $ex) {
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// Nothing to do
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}
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}
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return false;
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}
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/**
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* Log an user in via login name and password
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*
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* @param string $uid
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* @param string $password
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* @return boolean
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* @throws LoginException if an app canceld the login process or the user is not enabled
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*/
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private function loginWithPassword($uid, $password) {
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$this->manager->emit('\OC\User', 'preLogin', array($uid, $password));
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$user = $this->manager->checkPassword($uid, $password);
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if ($user === false) {
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// Password check failed
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return false;
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}
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if ($user->isEnabled()) {
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$this->setUser($user);
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$this->setLoginName($uid);
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$this->manager->emit('\OC\User', 'postLogin', array($user, $password));
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if ($this->isLoggedIn()) {
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$this->prepareUserLogin();
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return true;
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} else {
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// injecting l10n does not work - there is a circular dependency between session and \OCP\L10N\IFactory
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$message = \OC::$server->getL10N('lib')->t('Login canceled by app');
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throw new LoginException($message);
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}
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} else {
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// injecting l10n does not work - there is a circular dependency between session and \OCP\L10N\IFactory
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$message = \OC::$server->getL10N('lib')->t('User disabled');
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throw new LoginException($message);
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}
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}
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/**
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* Log an user in with a given token (id)
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*
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* @param string $token
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* @return boolean
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* @throws LoginException if an app canceld the login process or the user is not enabled
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*/
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private function loginWithToken($token) {
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try {
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$dbToken = $this->tokenProvider->getToken($token);
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} catch (InvalidTokenException $ex) {
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return false;
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}
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$uid = $dbToken->getUID();
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// When logging in with token, the password must be decrypted first before passing to login hook
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$password = '';
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try {
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$password = $this->tokenProvider->getPassword($dbToken, $token);
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} catch (PasswordlessTokenException $ex) {
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// Ignore and use empty string instead
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}
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$this->manager->emit('\OC\User', 'preLogin', array($uid, $password));
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$user = $this->manager->get($uid);
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if (is_null($user)) {
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// user does not exist
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return false;
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}
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if (!$user->isEnabled()) {
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// disabled users can not log in
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// injecting l10n does not work - there is a circular dependency between session and \OCP\L10N\IFactory
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$message = \OC::$server->getL10N('lib')->t('User disabled');
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throw new LoginException($message);
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}
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//login
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$this->setUser($user);
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$this->setLoginName($dbToken->getLoginName());
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$this->manager->emit('\OC\User', 'postLogin', array($user, $password));
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if ($this->isLoggedIn()) {
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$this->prepareUserLogin();
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} else {
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// injecting l10n does not work - there is a circular dependency between session and \OCP\L10N\IFactory
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$message = \OC::$server->getL10N('lib')->t('Login canceled by app');
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throw new LoginException($message);
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}
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return true;
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}
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/**
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* Create a new session token for the given user credentials
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*
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* @param IRequest $request
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* @param string $uid user UID
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* @param string $loginName login name
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* @param string $password
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* @return boolean
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*/
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public function createSessionToken(IRequest $request, $uid, $loginName, $password = null) {
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if (is_null($this->manager->get($uid))) {
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// User does not exist
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return false;
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}
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$name = isset($request->server['HTTP_USER_AGENT']) ? $request->server['HTTP_USER_AGENT'] : 'unknown browser';
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try {
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$sessionId = $this->session->getId();
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$pwd = $this->getPassword($password);
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$this->tokenProvider->generateToken($sessionId, $uid, $loginName, $pwd, $name);
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return true;
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} catch (SessionNotAvailableException $ex) {
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// This can happen with OCC, where a memory session is used
|
|
// if a memory session is used, we shouldn't create a session token anyway
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks if the given password is a token.
|
|
* If yes, the password is extracted from the token.
|
|
* If no, the same password is returned.
|
|
*
|
|
* @param string $password either the login password or a device token
|
|
* @return string|null the password or null if none was set in the token
|
|
*/
|
|
private function getPassword($password) {
|
|
if (is_null($password)) {
|
|
// This is surely no token ;-)
|
|
return null;
|
|
}
|
|
try {
|
|
$token = $this->tokenProvider->getToken($password);
|
|
try {
|
|
return $this->tokenProvider->getPassword($token, $password);
|
|
} catch (PasswordlessTokenException $ex) {
|
|
return null;
|
|
}
|
|
} catch (InvalidTokenException $ex) {
|
|
return $password;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param IToken $dbToken
|
|
* @param string $token
|
|
* @return boolean
|
|
*/
|
|
private function checkTokenCredentials(IToken $dbToken, $token) {
|
|
// Check whether login credentials are still valid and the user was not disabled
|
|
// This check is performed each 5 minutes
|
|
$lastCheck = $dbToken->getLastCheck() ? : 0;
|
|
$now = $this->timeFacory->getTime();
|
|
if ($lastCheck > ($now - 60 * 5)) {
|
|
// Checked performed recently, nothing to do now
|
|
return true;
|
|
}
|
|
|
|
try {
|
|
$pwd = $this->tokenProvider->getPassword($dbToken, $token);
|
|
} catch (InvalidTokenException $ex) {
|
|
// An invalid token password was used -> log user out
|
|
return false;
|
|
} catch (PasswordlessTokenException $ex) {
|
|
// Token has no password
|
|
|
|
if (!is_null($this->activeUser) && !$this->activeUser->isEnabled()) {
|
|
$this->tokenProvider->invalidateToken($token);
|
|
return false;
|
|
}
|
|
|
|
$dbToken->setLastCheck($now);
|
|
return true;
|
|
}
|
|
|
|
if ($this->manager->checkPassword($dbToken->getLoginName(), $pwd) === false
|
|
|| (!is_null($this->activeUser) && !$this->activeUser->isEnabled())) {
|
|
$this->tokenProvider->invalidateToken($token);
|
|
// Password has changed or user was disabled -> log user out
|
|
return false;
|
|
}
|
|
$dbToken->setLastCheck($now);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check if the given token exists and performs password/user-enabled checks
|
|
*
|
|
* Invalidates the token if checks fail
|
|
*
|
|
* @param string $token
|
|
* @param string $user login name
|
|
* @return boolean
|
|
*/
|
|
private function validateToken($token, $user = null) {
|
|
try {
|
|
$dbToken = $this->tokenProvider->getToken($token);
|
|
} catch (InvalidTokenException $ex) {
|
|
return false;
|
|
}
|
|
|
|
// Check if login names match
|
|
if (!is_null($user) && $dbToken->getLoginName() !== $user) {
|
|
// TODO: this makes it imposssible to use different login names on browser and client
|
|
// e.g. login by e-mail 'user@example.com' on browser for generating the token will not
|
|
// allow to use the client token with the login name 'user'.
|
|
return false;
|
|
}
|
|
|
|
if (!$this->checkTokenCredentials($dbToken, $token)) {
|
|
return false;
|
|
}
|
|
|
|
$this->tokenProvider->updateTokenActivity($dbToken);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Tries to login the user with auth token header
|
|
*
|
|
* @param IRequest $request
|
|
* @todo check remember me cookie
|
|
* @return boolean
|
|
*/
|
|
public function tryTokenLogin(IRequest $request) {
|
|
$authHeader = $request->getHeader('Authorization');
|
|
if (strpos($authHeader, 'token ') === false) {
|
|
// No auth header, let's try session id
|
|
try {
|
|
$token = $this->session->getId();
|
|
} catch (SessionNotAvailableException $ex) {
|
|
return false;
|
|
}
|
|
} else {
|
|
$token = substr($authHeader, 6);
|
|
}
|
|
|
|
if (!$this->loginWithToken($token)) {
|
|
return false;
|
|
}
|
|
if(!$this->validateToken($token)) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* perform login using the magic cookie (remember login)
|
|
*
|
|
* @param string $uid the username
|
|
* @param string $currentToken
|
|
* @return bool
|
|
*/
|
|
public function loginWithCookie($uid, $currentToken) {
|
|
$this->session->regenerateId();
|
|
$this->manager->emit('\OC\User', 'preRememberedLogin', array($uid));
|
|
$user = $this->manager->get($uid);
|
|
if (is_null($user)) {
|
|
// user does not exist
|
|
return false;
|
|
}
|
|
|
|
// get stored tokens
|
|
$tokens = OC::$server->getConfig()->getUserKeys($uid, 'login_token');
|
|
// test cookies token against stored tokens
|
|
if (!in_array($currentToken, $tokens, true)) {
|
|
return false;
|
|
}
|
|
// replace successfully used token with a new one
|
|
OC::$server->getConfig()->deleteUserValue($uid, 'login_token', $currentToken);
|
|
$newToken = OC::$server->getSecureRandom()->generate(32);
|
|
OC::$server->getConfig()->setUserValue($uid, 'login_token', $newToken, time());
|
|
$this->setMagicInCookie($user->getUID(), $newToken);
|
|
|
|
//login
|
|
$this->setUser($user);
|
|
$this->manager->emit('\OC\User', 'postRememberedLogin', array($user));
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* logout the user from the session
|
|
*/
|
|
public function logout() {
|
|
$this->manager->emit('\OC\User', 'logout');
|
|
$user = $this->getUser();
|
|
if (!is_null($user)) {
|
|
try {
|
|
$this->tokenProvider->invalidateToken($this->session->getId());
|
|
} catch (SessionNotAvailableException $ex) {
|
|
|
|
}
|
|
}
|
|
$this->setUser(null);
|
|
$this->setLoginName(null);
|
|
$this->unsetMagicInCookie();
|
|
$this->session->clear();
|
|
}
|
|
|
|
/**
|
|
* Set cookie value to use in next page load
|
|
*
|
|
* @param string $username username to be set
|
|
* @param string $token
|
|
*/
|
|
public function setMagicInCookie($username, $token) {
|
|
$secureCookie = OC::$server->getRequest()->getServerProtocol() === 'https';
|
|
$expires = time() + OC::$server->getConfig()->getSystemValue('remember_login_cookie_lifetime', 60 * 60 * 24 * 15);
|
|
setcookie('oc_username', $username, $expires, OC::$WEBROOT, '', $secureCookie, true);
|
|
setcookie('oc_token', $token, $expires, OC::$WEBROOT, '', $secureCookie, true);
|
|
setcookie('oc_remember_login', '1', $expires, OC::$WEBROOT, '', $secureCookie, true);
|
|
}
|
|
|
|
/**
|
|
* Remove cookie for "remember username"
|
|
*/
|
|
public function unsetMagicInCookie() {
|
|
//TODO: DI for cookies and IRequest
|
|
$secureCookie = OC::$server->getRequest()->getServerProtocol() === 'https';
|
|
|
|
unset($_COOKIE['oc_username']); //TODO: DI
|
|
unset($_COOKIE['oc_token']);
|
|
unset($_COOKIE['oc_remember_login']);
|
|
setcookie('oc_username', '', time() - 3600, OC::$WEBROOT, '', $secureCookie, true);
|
|
setcookie('oc_token', '', time() - 3600, OC::$WEBROOT, '', $secureCookie, true);
|
|
setcookie('oc_remember_login', '', time() - 3600, OC::$WEBROOT, '', $secureCookie, true);
|
|
// old cookies might be stored under /webroot/ instead of /webroot
|
|
// and Firefox doesn't like it!
|
|
setcookie('oc_username', '', time() - 3600, OC::$WEBROOT . '/', '', $secureCookie, true);
|
|
setcookie('oc_token', '', time() - 3600, OC::$WEBROOT . '/', '', $secureCookie, true);
|
|
setcookie('oc_remember_login', '', time() - 3600, OC::$WEBROOT . '/', '', $secureCookie, true);
|
|
}
|
|
|
|
/**
|
|
* Update password of the browser session token if there is one
|
|
*
|
|
* @param string $password
|
|
*/
|
|
public function updateSessionTokenPassword($password) {
|
|
try {
|
|
$sessionId = $this->session->getId();
|
|
$token = $this->tokenProvider->getToken($sessionId);
|
|
$this->tokenProvider->setPassword($token, $sessionId, $password);
|
|
} catch (SessionNotAvailableException $ex) {
|
|
// Nothing to do
|
|
} catch (InvalidTokenException $ex) {
|
|
// Nothing to do
|
|
}
|
|
}
|
|
|
|
}
|