nextcloud/core/Controller/ClientFlowLoginController.php

239 lines
6.0 KiB
PHP

<?php
/**
* @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Core\Controller;
use OC\Authentication\Exceptions\InvalidTokenException;
use OC\Authentication\Exceptions\PasswordlessTokenException;
use OC\Authentication\Token\IProvider;
use OC\Authentication\Token\IToken;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\Defaults;
use OCP\IL10N;
use OCP\IRequest;
use OCP\ISession;
use OCP\IURLGenerator;
use OCP\IUserSession;
use OCP\Security\ISecureRandom;
use OCP\Session\Exceptions\SessionNotAvailableException;
class ClientFlowLoginController extends Controller {
/** @var IUserSession */
private $userSession;
/** @var IL10N */
private $l10n;
/** @var Defaults */
private $defaults;
/** @var ISession */
private $session;
/** @var IProvider */
private $tokenProvider;
/** @var ISecureRandom */
private $random;
/** @var IURLGenerator */
private $urlGenerator;
const stateName = 'client.flow.state.token';
/**
* @param string $appName
* @param IRequest $request
* @param IUserSession $userSession
* @param IL10N $l10n
* @param Defaults $defaults
* @param ISession $session
* @param IProvider $tokenProvider
* @param ISecureRandom $random
* @param IURLGenerator $urlGenerator
*/
public function __construct($appName,
IRequest $request,
IUserSession $userSession,
IL10N $l10n,
Defaults $defaults,
ISession $session,
IProvider $tokenProvider,
ISecureRandom $random,
IURLGenerator $urlGenerator) {
parent::__construct($appName, $request);
$this->userSession = $userSession;
$this->l10n = $l10n;
$this->defaults = $defaults;
$this->session = $session;
$this->tokenProvider = $tokenProvider;
$this->random = $random;
$this->urlGenerator = $urlGenerator;
}
/**
* @return string
*/
private function getClientName() {
return $this->request->getHeader('USER_AGENT') !== null ? $this->request->getHeader('USER_AGENT') : 'unknown';
}
/**
* @param string $stateToken
* @return bool
*/
private function isValidToken($stateToken) {
$currentToken = $this->session->get(self::stateName);
if(!is_string($stateToken) || !is_string($currentToken)) {
return false;
}
return hash_equals($currentToken, $stateToken);
}
/**
* @return TemplateResponse
*/
private function stateTokenForbiddenResponse() {
$response = new TemplateResponse(
$this->appName,
'403',
[
'file' => $this->l10n->t('State token does not match'),
],
'guest'
);
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
/**
* @PublicPage
* @NoCSRFRequired
* @UseSession
*
* @return TemplateResponse
*/
public function showAuthPickerPage() {
if($this->userSession->isLoggedIn()) {
return new TemplateResponse(
$this->appName,
'403',
[
'file' => $this->l10n->t('Auth flow can only be started unauthenticated.'),
],
'guest'
);
}
$stateToken = $this->random->generate(
64,
ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_DIGITS
);
$this->session->set(self::stateName, $stateToken);
return new TemplateResponse(
$this->appName,
'loginflow/authpicker',
[
'client' => $this->getClientName(),
'instanceName' => $this->defaults->getName(),
'urlGenerator' => $this->urlGenerator,
'stateToken' => $stateToken,
'serverHost' => $this->request->getServerHost(),
],
'guest'
);
}
/**
* @NoAdminRequired
* @NoCSRFRequired
* @UseSession
*
* @param string $stateToken
* @return TemplateResponse
*/
public function redirectPage($stateToken = '') {
if(!$this->isValidToken($stateToken)) {
return $this->stateTokenForbiddenResponse();
}
return new TemplateResponse(
$this->appName,
'loginflow/redirect',
[
'urlGenerator' => $this->urlGenerator,
'stateToken' => $stateToken,
],
'empty'
);
}
/**
* @NoAdminRequired
* @UseSession
*
* @param string $stateToken
* @return Http\RedirectResponse|Response
*/
public function generateAppPassword($stateToken) {
if(!$this->isValidToken($stateToken)) {
$this->session->remove(self::stateName);
return $this->stateTokenForbiddenResponse();
}
$this->session->remove(self::stateName);
try {
$sessionId = $this->session->getId();
} catch (SessionNotAvailableException $ex) {
$response = new Response();
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
try {
$sessionToken = $this->tokenProvider->getToken($sessionId);
$loginName = $sessionToken->getLoginName();
try {
$password = $this->tokenProvider->getPassword($sessionToken, $sessionId);
} catch (PasswordlessTokenException $ex) {
$password = null;
}
} catch (InvalidTokenException $ex) {
$response = new Response();
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
$token = $this->random->generate(72);
$this->tokenProvider->generateToken(
$token,
$this->userSession->getUser()->getUID(),
$loginName,
$password,
$this->getClientName(),
IToken::PERMANENT_TOKEN,
IToken::DO_NOT_REMEMBER
);
return new Http\RedirectResponse('nc://' . urlencode($loginName) . ':' . urlencode($token) . '@' . $this->request->getServerHost());
}
}