173 lines
5.1 KiB
PHP
173 lines
5.1 KiB
PHP
<?php
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/**
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* @author Arthur Schiwon <blizzz@owncloud.com>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christian Seiler <christian@iwakd.de>
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* @author Jakob Sack <mail@jakobsack.de>
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Markus Goetz <markus@woboq.com>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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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) 2015, 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 OCA\DAV\Connector\Sabre;
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use Exception;
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use OCP\ISession;
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use OCP\IUserSession;
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use Sabre\DAV\Auth\Backend\AbstractBasic;
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use Sabre\DAV\Exception\NotAuthenticated;
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use Sabre\DAV\Exception\ServiceUnavailable;
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use Sabre\HTTP\RequestInterface;
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use Sabre\HTTP\ResponseInterface;
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class Auth extends AbstractBasic {
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const DAV_AUTHENTICATED = 'AUTHENTICATED_TO_DAV_BACKEND';
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/** @var ISession */
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private $session;
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/** @var IUserSession */
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private $userSession;
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/**
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* @param ISession $session
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* @param IUserSession $userSession
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*/
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public function __construct(ISession $session,
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IUserSession $userSession) {
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$this->session = $session;
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$this->userSession = $userSession;
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$this->principalPrefix = 'principals/users/';
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}
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/**
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* Whether the user has initially authenticated via DAV
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*
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* This is required for WebDAV clients that resent the cookies even when the
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* account was changed.
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*
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* @see https://github.com/owncloud/core/issues/13245
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*
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* @param string $username
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* @return bool
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*/
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public function isDavAuthenticated($username) {
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return !is_null($this->session->get(self::DAV_AUTHENTICATED)) &&
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$this->session->get(self::DAV_AUTHENTICATED) === $username;
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}
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/**
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* Validates a username and password
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*
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* This method should return true or false depending on if login
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* succeeded.
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*
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* @param string $username
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* @param string $password
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* @return bool
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*/
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protected function validateUserPass($username, $password) {
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if ($this->userSession->isLoggedIn() &&
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$this->isDavAuthenticated($this->userSession->getUser()->getUID())
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) {
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\OC_Util::setupFS($this->userSession->getUser()->getUID());
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$this->session->close();
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return true;
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} else {
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\OC_Util::setUpFS(); //login hooks may need early access to the filesystem
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if($this->userSession->login($username, $password)) {
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\OC_Util::setUpFS($this->userSession->getUser()->getUID());
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$this->session->set(self::DAV_AUTHENTICATED, $this->userSession->getUser()->getUID());
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$this->session->close();
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return true;
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} else {
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$this->session->close();
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return false;
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}
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}
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}
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/**
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* Returns information about the currently logged in username.
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*
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* If nobody is currently logged in, this method should return null.
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*
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* @return string|null
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*/
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public function getCurrentUser() {
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$user = $this->userSession->getUser() ? $this->userSession->getUser()->getUID() : null;
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if($user !== null && $this->isDavAuthenticated($user)) {
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return $user;
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}
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if($user !== null && is_null($this->session->get(self::DAV_AUTHENTICATED))) {
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return $user;
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}
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return null;
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}
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/**
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* @param RequestInterface $request
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* @param ResponseInterface $response
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* @return array
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* @throws NotAuthenticated
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* @throws ServiceUnavailable
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*/
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function check(RequestInterface $request, ResponseInterface $response) {
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try {
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$result = $this->auth($request, $response);
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return $result;
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} catch (NotAuthenticated $e) {
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throw $e;
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} catch (Exception $e) {
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$class = get_class($e);
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$msg = $e->getMessage();
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throw new ServiceUnavailable("$class: $msg");
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}
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}
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/**
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* @param RequestInterface $request
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* @param ResponseInterface $response
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* @return array
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*/
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private function auth(RequestInterface $request, ResponseInterface $response) {
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if (\OC_User::handleApacheAuth() ||
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($this->userSession->isLoggedIn() && is_null($this->session->get(self::DAV_AUTHENTICATED)))
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) {
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$user = $this->userSession->getUser()->getUID();
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\OC_Util::setupFS($user);
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$this->currentUser = $user;
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$this->session->close();
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return [true, $this->principalPrefix . $user];
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}
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if ($request->getHeader('X-Requested-With') === 'XMLHttpRequest') {
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// do not re-authenticate over ajax, use dummy auth name to prevent browser popup
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$response->addHeader('WWW-Authenticate','DummyBasic realm="' . $this->realm . '"');
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$response->setStatus(401);
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throw new \Sabre\DAV\Exception\NotAuthenticated('Cannot authenticate over ajax calls');
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}
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return parent::check($request, $response);
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}
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}
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