646 lines
18 KiB
PHP
646 lines
18 KiB
PHP
<?php
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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 <icewind@owncloud.com>
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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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* @copyright Copyright (c) 2016, ownCloud, Inc.
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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\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, ISession $session, ITimeFactory $timeFacory, $tokenProvider, 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 User|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($this->activeUser);
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}
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return $this->activeUser;
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}
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protected function validateSession(IUser $user) {
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try {
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$sessionId = $this->session->getId();
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} catch (SessionNotAvailableException $ex) {
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return;
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}
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try {
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$token = $this->tokenProvider->getToken($sessionId);
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} catch (InvalidTokenException $ex) {
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// Session was invalidated
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$this->logout();
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return;
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}
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// Check whether login credentials are still valid and the user was not disabled
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// This check is performed each 5 minutes
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$lastCheck = $this->session->get('last_login_check') ? : 0;
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$now = $this->timeFacory->getTime();
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if ($lastCheck < ($now - 60 * 5)) {
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try {
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$pwd = $this->tokenProvider->getPassword($token, $sessionId);
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} catch (InvalidTokenException $ex) {
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// An invalid token password was used -> log user out
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$this->logout();
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return;
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} catch (PasswordlessTokenException $ex) {
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// Token has no password, nothing to check
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$this->session->set('last_login_check', $now);
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return;
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}
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if ($this->manager->checkPassword($token->getLoginName(), $pwd) === false
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|| !$user->isEnabled()) {
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// Password has changed or user was disabled -> log user out
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$this->logout();
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return;
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}
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$this->session->set('last_login_check', $now);
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}
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// Session is valid, so the token can be refreshed
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$this->updateToken($token);
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}
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/**
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* Checks whether the user is logged in
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*
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* @return bool if logged in
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*/
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public function isLoggedIn() {
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$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)) {
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$user = $this->getUser();
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// When logging in with token, the password must be decrypted first before passing to login hook
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try {
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$token = $this->tokenProvider->getToken($password);
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try {
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$password = $this->tokenProvider->getPassword($token, $password);
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$this->manager->emit('\OC\User', 'preLogin', array($uid, $password));
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} catch (PasswordlessTokenException $ex) {
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$this->manager->emit('\OC\User', 'preLogin', array($uid, ''));
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}
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} catch (InvalidTokenException $ex) {
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// Invalid token, nothing to do
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}
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} else {
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$this->manager->emit('\OC\User', 'preLogin', array($uid, $password));
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$user = $this->manager->checkPassword($uid, $password);
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}
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if ($user !== false) {
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if (!is_null($user)) {
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if ($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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return false;
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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 $password
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* @throws LoginException
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* @return boolean
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*/
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public function logClientIn($user, $password) {
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$isTokenPassword = $this->isTokenPassword($password);
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if (!$isTokenPassword && $this->isTokenAuthEnforced()) {
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// TODO: throw LoginException instead (https://github.com/owncloud/core/pull/24616)
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return false;
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}
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if (!$isTokenPassword && $this->isTwoFactorEnforced($user)) {
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// TODO: throw LoginException instead (https://github.com/owncloud/core/pull/24616)
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return false;
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}
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return $this->login($user, $password);
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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($user)) {
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return true;
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}
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// DI not possible due to cyclic dependencies :'-/
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return OC::$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 type $password
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* @return boolean
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*/
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public function isTokenPassword($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 $request) {
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if (!empty($request->server['PHP_AUTH_USER']) && !empty($request->server['PHP_AUTH_PW'])) {
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$result = $this->logClientIn($request->server['PHP_AUTH_USER'], $request->server['PHP_AUTH_PW']);
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if ($result === true) {
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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, $this->getUser()->getUID()
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);
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return true;
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}
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}
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return false;
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}
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private function loginWithToken($uid) {
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// TODO: $this->manager->emit('\OC\User', 'preTokenLogin', array($uid));
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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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return false;
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}
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//login
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$this->setUser($user);
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// TODO: $this->manager->emit('\OC\User', 'postTokenLogin', array($user));
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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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* @throws SessionNotAvailableException
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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']) ? $request->server['HTTP_USER_AGENT'] : 'unknown browser';
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$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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}
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/**
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* Checks if the given password is a token.
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* If yes, the password is extracted from the token.
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* If no, the same password is returned.
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*
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* @param string $password either the login password or a device token
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* @return string|null the password or null if none was set in the token
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*/
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private function getPassword($password) {
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if (is_null($password)) {
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// This is surely no token ;-)
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return null;
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}
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try {
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$token = $this->tokenProvider->getToken($password);
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try {
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return $this->tokenProvider->getPassword($token, $password);
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} catch (PasswordlessTokenException $ex) {
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return null;
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}
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} catch (InvalidTokenException $ex) {
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return $password;
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}
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}
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/**
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* @param string $token
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* @return boolean
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*/
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private function validateToken($token) {
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try {
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$token = $this->tokenProvider->validateToken($token);
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if (!is_null($token)) {
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$result = $this->loginWithToken($token->getUID());
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if ($result) {
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// Login success
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$this->updateToken($token);
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return true;
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}
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}
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} catch (InvalidTokenException $ex) {
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}
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return false;
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}
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/**
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* @param IToken $token
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*/
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private function updateToken(IToken $token) {
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// To save unnecessary DB queries, this is only done once a minute
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$lastTokenUpdate = $this->session->get('last_token_update') ? : 0;
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$now = $this->timeFacory->getTime();
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if ($lastTokenUpdate < ($now - 60)) {
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$this->tokenProvider->updateToken($token);
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$this->session->set('last_token_update', $now);
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}
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}
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/**
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* Tries to login the user with auth token header
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*
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* @todo check remember me cookie
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* @return boolean
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*/
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public function tryTokenLogin(IRequest $request) {
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$authHeader = $request->getHeader('Authorization');
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if (strpos($authHeader, 'token ') === false) {
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// No auth header, let's try session id
|
|
try {
|
|
$sessionId = $this->session->getId();
|
|
return $this->validateToken($sessionId);
|
|
} catch (SessionNotAvailableException $ex) {
|
|
return false;
|
|
}
|
|
} else {
|
|
$token = substr($authHeader, 6);
|
|
return $this->validateToken($token);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
}
|