nextcloud/core/Controller/ClientFlowLoginV2Controller...

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @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\Core\Db\LoginFlowV2;
use OC\Core\Exception\LoginFlowV2NotFoundException;
use OC\Core\Service\LoginFlowV2Service;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\Http\RedirectResponse;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Http\StandaloneTemplateResponse;
use OCP\Defaults;
use OCP\IL10N;
use OCP\IRequest;
use OCP\ISession;
use OCP\IURLGenerator;
use OCP\Security\ISecureRandom;
class ClientFlowLoginV2Controller extends Controller {
public const TOKEN_NAME = 'client.flow.v2.login.token';
public const STATE_NAME = 'client.flow.v2.state.token';
/** @var LoginFlowV2Service */
private $loginFlowV2Service;
/** @var IURLGenerator */
private $urlGenerator;
/** @var ISession */
private $session;
/** @var ISecureRandom */
private $random;
/** @var Defaults */
private $defaults;
/** @var string */
private $userId;
/** @var IL10N */
private $l10n;
public function __construct(string $appName,
IRequest $request,
LoginFlowV2Service $loginFlowV2Service,
IURLGenerator $urlGenerator,
ISession $session,
ISecureRandom $random,
Defaults $defaults,
?string $userId,
IL10N $l10n) {
parent::__construct($appName, $request);
$this->loginFlowV2Service = $loginFlowV2Service;
$this->urlGenerator = $urlGenerator;
$this->session = $session;
$this->random = $random;
$this->defaults = $defaults;
$this->userId = $userId;
$this->l10n = $l10n;
}
/**
* @NoCSRFRequired
* @PublicPage
*/
public function poll(string $token): JSONResponse {
try {
$creds = $this->loginFlowV2Service->poll($token);
} catch (LoginFlowV2NotFoundException $e) {
return new JSONResponse([], Http::STATUS_NOT_FOUND);
}
return new JSONResponse($creds);
}
/**
* @NoCSRFRequired
* @PublicPage
* @UseSession
*/
public function landing(string $token): Response {
if (!$this->loginFlowV2Service->startLoginFlow($token)) {
return $this->loginTokenForbiddenResponse();
}
$this->session->set(self::TOKEN_NAME, $token);
return new RedirectResponse(
$this->urlGenerator->linkToRouteAbsolute('core.ClientFlowLoginV2.showAuthPickerPage')
);
}
/**
* @NoCSRFRequired
* @PublicPage
* @UseSession
*/
public function showAuthPickerPage(): StandaloneTemplateResponse {
try {
$flow = $this->getFlowByLoginToken();
} catch (LoginFlowV2NotFoundException $e) {
return $this->loginTokenForbiddenResponse();
}
$stateToken = $this->random->generate(
64,
ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_DIGITS
);
$this->session->set(self::STATE_NAME, $stateToken);
return new StandaloneTemplateResponse(
$this->appName,
'loginflowv2/authpicker',
[
'client' => $flow->getClientName(),
'instanceName' => $this->defaults->getName(),
'urlGenerator' => $this->urlGenerator,
'stateToken' => $stateToken,
],
'guest'
);
}
/**
* @NoAdminRequired
* @UseSession
* @NoCSRFRequired
* @NoSameSiteCookieRequired
*/
public function grantPage(string $stateToken): StandaloneTemplateResponse {
if (!$this->isValidStateToken($stateToken)) {
return $this->stateTokenForbiddenResponse();
}
try {
$flow = $this->getFlowByLoginToken();
} catch (LoginFlowV2NotFoundException $e) {
return $this->loginTokenForbiddenResponse();
}
return new StandaloneTemplateResponse(
$this->appName,
'loginflowv2/grant',
[
'client' => $flow->getClientName(),
'instanceName' => $this->defaults->getName(),
'urlGenerator' => $this->urlGenerator,
'stateToken' => $stateToken,
],
'guest'
);
}
/**
* @NoAdminRequired
* @UseSession
*/
public function generateAppPassword(string $stateToken): Response {
if (!$this->isValidStateToken($stateToken)) {
return $this->stateTokenForbiddenResponse();
}
try {
$this->getFlowByLoginToken();
} catch (LoginFlowV2NotFoundException $e) {
return $this->loginTokenForbiddenResponse();
}
$loginToken = $this->session->get(self::TOKEN_NAME);
// Clear session variables
$this->session->remove(self::TOKEN_NAME);
$this->session->remove(self::STATE_NAME);
$sessionId = $this->session->getId();
$result = $this->loginFlowV2Service->flowDone($loginToken, $sessionId, $this->getServerPath(), $this->userId);
if ($result) {
return new StandaloneTemplateResponse(
$this->appName,
'loginflowv2/done',
[],
'guest'
);
}
$response = new StandaloneTemplateResponse(
$this->appName,
'403',
[
'message' => $this->l10n->t('Could not complete login'),
],
'guest'
);
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
/**
* @NoCSRFRequired
* @PublicPage
*/
public function init(): JSONResponse {
// Get client user agent
$userAgent = $this->request->getHeader('USER_AGENT');
$tokens = $this->loginFlowV2Service->createTokens($userAgent);
$data = [
'poll' => [
'token' => $tokens->getPollToken(),
'endpoint' => $this->urlGenerator->linkToRouteAbsolute('core.ClientFlowLoginV2.poll')
],
'login' => $this->urlGenerator->linkToRouteAbsolute('core.ClientFlowLoginV2.landing', ['token' => $tokens->getLoginToken()]),
];
return new JSONResponse($data);
}
private function isValidStateToken(string $stateToken): bool {
$currentToken = $this->session->get(self::STATE_NAME);
if (!is_string($stateToken) || !is_string($currentToken)) {
return false;
}
return hash_equals($currentToken, $stateToken);
}
private function stateTokenForbiddenResponse(): StandaloneTemplateResponse {
$response = new StandaloneTemplateResponse(
$this->appName,
'403',
[
'message' => $this->l10n->t('State token does not match'),
],
'guest'
);
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
/**
* @return LoginFlowV2
* @throws LoginFlowV2NotFoundException
*/
private function getFlowByLoginToken(): LoginFlowV2 {
$currentToken = $this->session->get(self::TOKEN_NAME);
if (!is_string($currentToken)) {
throw new LoginFlowV2NotFoundException('Login token not set in session');
}
return $this->loginFlowV2Service->getByLoginToken($currentToken);
}
private function loginTokenForbiddenResponse(): StandaloneTemplateResponse {
$response = new StandaloneTemplateResponse(
$this->appName,
'403',
[
'message' => $this->l10n->t('Your login token is invalid or has expired'),
],
'guest'
);
$response->setStatus(Http::STATUS_FORBIDDEN);
return $response;
}
private function getServerPath(): string {
$serverPostfix = '';
if (strpos($this->request->getRequestUri(), '/index.php') !== false) {
$serverPostfix = substr($this->request->getRequestUri(), 0, strpos($this->request->getRequestUri(), '/index.php'));
} elseif (strpos($this->request->getRequestUri(), '/login/v2') !== false) {
$serverPostfix = substr($this->request->getRequestUri(), 0, strpos($this->request->getRequestUri(), '/login/v2'));
}
$protocol = $this->request->getServerProtocol();
return $protocol . '://' . $this->request->getServerHost() . $serverPostfix;
}
}