Merge pull request #4479 from nextcloud/auth-flow

Add new auth flow basics

core/Controller/ClientFlowLoginController.php

@@ -0,0 +1,238 @@
+<?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());
+	}
+
+}

core/css/login/authpicker.css

@@ -0,0 +1,9 @@
+.picker-window {
+	display: block;
+	padding: 10px;
+	margin-bottom: 20px;
+	background-color: rgba(0,0,0,.3);
+	color: #fff;
+	border-radius: 3px;
+	cursor: default;
+}

core/js/login/authpicker.js

@@ -0,0 +1,13 @@
+jQuery(document).ready(function() {
+	$('#app-token-login').click(function (e) {
+		e.preventDefault();
+		$(this).addClass('hidden');
+		$('#redirect-link').addClass('hidden');
+		$('#app-token-login-field').removeClass('hidden');
+	});
+
+	$('#submit-app-token-login').click(function(e) {
+		e.preventDefault();
+		window.location.href = 'nc://' + encodeURIComponent($('#user').val()) + ':' + encodeURIComponent($('#password').val()) + '@' + encodeURIComponent($('#serverHost').val());
+	});
+});

core/js/login/redirect.js

@@ -0,0 +1,3 @@
+jQuery(document).ready(function() {
+	$('#submit-redirect-form').trigger('click');
+});

core/routes.php

@@ -49,6 +49,9 @@ $application->registerRoutes($this, [
 		['name' => 'login#confirmPassword', 'url' => '/login/confirm', 'verb' => 'POST'],
 		['name' => 'login#showLoginForm', 'url' => '/login', 'verb' => 'GET'],
 		['name' => 'login#logout', 'url' => '/logout', 'verb' => 'GET'],
+		['name' => 'ClientFlowLogin#showAuthPickerPage', 'url' => '/login/flow', 'verb' => 'GET'],
+		['name' => 'ClientFlowLogin#redirectPage', 'url' => '/login/flow/redirect', 'verb' => 'GET'],
+		['name' => 'ClientFlowLogin#generateAppPassword', 'url' => '/login/flow', 'verb' => 'POST'],
 		['name' => 'TwoFactorChallenge#selectChallenge', 'url' => '/login/selectchallenge', 'verb' => 'GET'],
 		['name' => 'TwoFactorChallenge#showChallenge', 'url' => '/login/challenge/{challengeProviderId}', 'verb' => 'GET'],
 		['name' => 'TwoFactorChallenge#solveChallenge', 'url' => '/login/challenge/{challengeProviderId}', 'verb' => 'POST'],

core/templates/loginflow/authpicker.php

@@ -0,0 +1,57 @@
+<?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/>.
+ *
+ */
+
+script('core', 'login/authpicker');
+style('core', 'login/authpicker');
+
+/** @var array $_ */
+/** @var \OCP\IURLGenerator $urlGenerator */
+$urlGenerator = $_['urlGenerator'];
+?>
+
+<div class="picker-window">
+	<p class="info">
+		<?php p($l->t('You are about to grant "%s" access to your %s account.', [$_['client'], $_['instanceName']])) ?>
+	</p>
+
+	<br/>
+
+	<p id="redirect-link">
+		<a href="<?php p($urlGenerator->linkToRouteAbsolute('core.ClientFlowLogin.redirectPage', ['stateToken' => $_['stateToken']])) ?>">
+			<input type="submit" class="login primary icon-confirm-white" value="<?php p('Grant access') ?>">
+		</a>
+	</p>
+
+	<fieldset id="app-token-login-field" class="hidden">
+		<p class="grouptop">
+			<input type="text" name="user" id="user" placeholder="<?php p($l->t('Username')) ?>">
+			<label for="user" class="infield"><?php p($l->t('Username')) ?></label>
+		</p>
+		<p class="groupbottom">
+			<input type="password" name="password" id="password" placeholder="<?php p($l->t('App token')) ?>">
+			<label for="password" class="infield"><?php p($l->t('Password')) ?></label>
+		</p>
+		<input type="hidden" id="serverHost" value="<?php p($_['serverHost']) ?>" />
+		<input id="submit-app-token-login" type="submit" class="login primary icon-confirm-white" value="<?php p('Grant access') ?>">
+	</fieldset>
+</div>
+
+<a id="app-token-login" class="warning" href="#"><?php p($l->t('Alternative login using app token')) ?></a>

core/templates/loginflow/redirect.php

@@ -0,0 +1,37 @@
+<?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/>.
+ *
+ */
+script('core', 'login/redirect');
+style('core', 'login/authpicker');
+
+/** @var array $_ */
+/** @var \OCP\IURLGenerator $urlGenerator */
+$urlGenerator = $_['urlGenerator'];
+?>
+
+<div class="picker-window">
+	<p class="info"><?php p($l->t('Redirecting …')) ?></p>
+</div>
+
+<form method="POST" action="<?php p($urlGenerator->linkToRouteAbsolute('core.ClientFlowLogin.generateAppPassword')) ?>">
+	<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']) ?>" />
+	<input type="hidden" name="stateToken" value="<?php p($_['stateToken']) ?>" />
+	<input id="submit-redirect-form" type="submit" class="hidden "/>
+</form>

lib/composer/composer/autoload_classmap.php

@@ -444,6 +444,7 @@ return array(
     'OC\\Core\\Command\\User\\ResetPassword' => $baseDir . '/core/Command/User/ResetPassword.php',
     'OC\\Core\\Command\\User\\Setting' => $baseDir . '/core/Command/User/Setting.php',
     'OC\\Core\\Controller\\AvatarController' => $baseDir . '/core/Controller/AvatarController.php',
+    'OC\\Core\\Controller\\ClientFlowLoginController' => $baseDir . '/core/Controller/ClientFlowLoginController.php',
     'OC\\Core\\Controller\\CssController' => $baseDir . '/core/Controller/CssController.php',
     'OC\\Core\\Controller\\JsController' => $baseDir . '/core/Controller/JsController.php',
     'OC\\Core\\Controller\\LoginController' => $baseDir . '/core/Controller/LoginController.php',

lib/composer/composer/autoload_static.php

@@ -474,6 +474,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Core\\Command\\User\\ResetPassword' => __DIR__ . '/../../..' . '/core/Command/User/ResetPassword.php',
         'OC\\Core\\Command\\User\\Setting' => __DIR__ . '/../../..' . '/core/Command/User/Setting.php',
         'OC\\Core\\Controller\\AvatarController' => __DIR__ . '/../../..' . '/core/Controller/AvatarController.php',
+        'OC\\Core\\Controller\\ClientFlowLoginController' => __DIR__ . '/../../..' . '/core/Controller/ClientFlowLoginController.php',
         'OC\\Core\\Controller\\CssController' => __DIR__ . '/../../..' . '/core/Controller/CssController.php',
         'OC\\Core\\Controller\\JsController' => __DIR__ . '/../../..' . '/core/Controller/JsController.php',
         'OC\\Core\\Controller\\LoginController' => __DIR__ . '/../../..' . '/core/Controller/LoginController.php',

tests/Core/Controller/ClientFlowLoginControllerTest.php

@@ -0,0 +1,408 @@
+<?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 Tests\Core\Controller;
+
+use OC\Authentication\Exceptions\InvalidTokenException;
+use OC\Authentication\Exceptions\PasswordlessTokenException;
+use OC\Authentication\Token\IProvider;
+use OC\Authentication\Token\IToken;
+use OC\Core\Controller\ClientFlowLoginController;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\TemplateResponse;
+use OCP\Defaults;
+use OCP\IL10N;
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IURLGenerator;
+use OCP\IUser;
+use OCP\IUserSession;
+use OCP\Security\ISecureRandom;
+use OCP\Session\Exceptions\SessionNotAvailableException;
+use Test\TestCase;
+
+class ClientFlowLoginControllerTest extends TestCase {
+	/** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+	private $request;
+	/** @var IUserSession|\PHPUnit_Framework_MockObject_MockObject */
+	private $userSession;
+	/** @var IL10N|\PHPUnit_Framework_MockObject_MockObject */
+	private $l10n;
+	/** @var Defaults|\PHPUnit_Framework_MockObject_MockObject */
+	private $defaults;
+	/** @var ISession|\PHPUnit_Framework_MockObject_MockObject */
+	private $session;
+	/** @var IProvider|\PHPUnit_Framework_MockObject_MockObject */
+	private $tokenProvider;
+	/** @var ISecureRandom|\PHPUnit_Framework_MockObject_MockObject */
+	private $random;
+	/** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
+	private $urlGenerator;
+	/** @var ClientFlowLoginController */
+	private $clientFlowLoginController;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->request = $this->createMock(IRequest::class);
+		$this->userSession = $this->createMock(IUserSession::class);
+		$this->l10n = $this->createMock(IL10N::class);
+		$this->l10n
+			->expects($this->any())
+			->method('t')
+			->will($this->returnCallback(function($text, $parameters = array()) {
+				return vsprintf($text, $parameters);
+			}));
+		$this->defaults = $this->createMock(Defaults::class);
+		$this->session = $this->createMock(ISession::class);
+		$this->tokenProvider = $this->createMock(IProvider::class);
+		$this->random = $this->createMock(ISecureRandom::class);
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+
+		$this->clientFlowLoginController = new ClientFlowLoginController(
+			'core',
+			$this->request,
+			$this->userSession,
+			$this->l10n,
+			$this->defaults,
+			$this->session,
+			$this->tokenProvider,
+			$this->random,
+			$this->urlGenerator
+		);
+	}
+
+	public function testShowAuthPickerPageNotAuthenticated() {
+		$this->userSession
+			->expects($this->once())
+			->method('isLoggedIn')
+			->willReturn(true);
+
+		$expected = new TemplateResponse(
+			'core',
+			'403',
+			[
+				'file' => 'Auth flow can only be started unauthenticated.',
+			],
+			'guest'
+		);
+		$this->assertEquals($expected, $this->clientFlowLoginController->showAuthPickerPage());
+	}
+
+	public function testShowAuthPickerPage() {
+		$this->userSession
+			->expects($this->once())
+			->method('isLoggedIn')
+			->willReturn(false);
+		$this->random
+			->expects($this->once())
+			->method('generate')
+			->with(
+				64,
+				ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_DIGITS
+			)
+			->willReturn('StateToken');
+		$this->session
+			->expects($this->once())
+			->method('set')
+			->with('client.flow.state.token', 'StateToken');
+		$this->request
+			->expects($this->exactly(2))
+			->method('getHeader')
+			->with('USER_AGENT')
+			->willReturn('Mac OS X Sync Client');
+		$this->defaults
+			->expects($this->once())
+			->method('getName')
+			->willReturn('ExampleCloud');
+		$this->request
+			->expects($this->once())
+			->method('getServerHost')
+			->willReturn('example.com');
+
+		$expected = new TemplateResponse(
+			'core',
+			'loginflow/authpicker',
+			[
+				'client' => 'Mac OS X Sync Client',
+				'instanceName' => 'ExampleCloud',
+				'urlGenerator' => $this->urlGenerator,
+				'stateToken' => 'StateToken',
+				'serverHost' => 'example.com',
+			],
+			'guest'
+		);
+		$this->assertEquals($expected, $this->clientFlowLoginController->showAuthPickerPage());
+	}
+
+	public function testRedirectPageWithInvalidToken() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('OtherToken');
+
+		$expected = new TemplateResponse(
+			'core',
+			'403',
+			[
+				'file' => 'State token does not match',
+			],
+			'guest'
+		);
+		$expected->setStatus(Http::STATUS_FORBIDDEN);
+		$this->assertEquals($expected, $this->clientFlowLoginController->redirectPage('MyStateToken'));
+	}
+
+	public function testRedirectPageWithoutToken() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn(null);
+
+		$expected = new TemplateResponse(
+			'core',
+			'403',
+			[
+				'file' => 'State token does not match',
+			],
+			'guest'
+		);
+		$expected->setStatus(Http::STATUS_FORBIDDEN);
+		$this->assertEquals($expected, $this->clientFlowLoginController->redirectPage('MyStateToken'));
+	}
+
+	public function testRedirectPage() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('MyStateToken');
+
+		$expected = new TemplateResponse(
+			'core',
+			'loginflow/redirect',
+			[
+				'urlGenerator' => $this->urlGenerator,
+				'stateToken' => 'MyStateToken',
+			],
+			'empty'
+		);
+		$this->assertEquals($expected, $this->clientFlowLoginController->redirectPage('MyStateToken'));
+	}
+
+	public function testGenerateAppPasswordWithInvalidToken() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('OtherToken');
+		$this->session
+			->expects($this->once())
+			->method('remove')
+			->with('client.flow.state.token');
+
+		$expected = new TemplateResponse(
+			'core',
+			'403',
+			[
+				'file' => 'State token does not match',
+			],
+			'guest'
+		);
+		$expected->setStatus(Http::STATUS_FORBIDDEN);
+		$this->assertEquals($expected, $this->clientFlowLoginController->generateAppPassword('MyStateToken'));
+	}
+
+	public function testGenerateAppPasswordWithSessionNotAvailableException() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('MyStateToken');
+		$this->session
+			->expects($this->once())
+			->method('remove')
+			->with('client.flow.state.token');
+		$this->session
+			->expects($this->once())
+			->method('getId')
+			->willThrowException(new SessionNotAvailableException());
+
+		$expected = new Http\Response();
+		$expected->setStatus(Http::STATUS_FORBIDDEN);
+		$this->assertEquals($expected, $this->clientFlowLoginController->generateAppPassword('MyStateToken'));
+	}
+
+	public function testGenerateAppPasswordWithInvalidTokenException() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('MyStateToken');
+		$this->session
+			->expects($this->once())
+			->method('remove')
+			->with('client.flow.state.token');
+		$this->session
+			->expects($this->once())
+			->method('getId')
+			->willReturn('SessionId');
+		$this->tokenProvider
+			->expects($this->once())
+			->method('getToken')
+			->with('SessionId')
+			->willThrowException(new InvalidTokenException());
+
+		$expected = new Http\Response();
+		$expected->setStatus(Http::STATUS_FORBIDDEN);
+		$this->assertEquals($expected, $this->clientFlowLoginController->generateAppPassword('MyStateToken'));
+	}
+
+	public function testGeneratePasswordWithPassword() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('MyStateToken');
+		$this->session
+			->expects($this->once())
+			->method('remove')
+			->with('client.flow.state.token');
+		$this->session
+			->expects($this->once())
+			->method('getId')
+			->willReturn('SessionId');
+		$myToken = $this->createMock(IToken::class);
+		$myToken
+			->expects($this->once())
+			->method('getLoginName')
+			->willReturn('MyLoginName');
+		$this->tokenProvider
+			->expects($this->once())
+			->method('getToken')
+			->with('SessionId')
+			->willReturn($myToken);
+		$this->tokenProvider
+			->expects($this->once())
+			->method('getPassword')
+			->with($myToken, 'SessionId')
+			->willReturn('MyPassword');
+		$this->random
+			->expects($this->once())
+			->method('generate')
+			->with(72)
+			->willReturn('MyGeneratedToken');
+		$user = $this->createMock(IUser::class);
+		$user
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('MyUid');
+		$this->userSession
+			->expects($this->once())
+			->method('getUser')
+			->willReturn($user);
+		$this->tokenProvider
+			->expects($this->once())
+			->method('generateToken')
+			->with(
+				'MyGeneratedToken',
+				'MyUid',
+				'MyLoginName',
+				'MyPassword',
+				'unknown',
+				IToken::PERMANENT_TOKEN,
+				IToken::DO_NOT_REMEMBER
+			);
+		$this->request
+			->expects($this->once())
+			->method('getServerHost')
+			->willReturn('example.com');
+
+		$expected = new Http\RedirectResponse('nc://MyLoginName:MyGeneratedToken@example.com');
+		$this->assertEquals($expected, $this->clientFlowLoginController->generateAppPassword('MyStateToken'));
+	}
+
+	public function testGeneratePasswordWithoutPassword() {
+		$this->session
+			->expects($this->once())
+			->method('get')
+			->with('client.flow.state.token')
+			->willReturn('MyStateToken');
+		$this->session
+			->expects($this->once())
+			->method('remove')
+			->with('client.flow.state.token');
+		$this->session
+			->expects($this->once())
+			->method('getId')
+			->willReturn('SessionId');
+		$myToken = $this->createMock(IToken::class);
+		$myToken
+			->expects($this->once())
+			->method('getLoginName')
+			->willReturn('MyLoginName');
+		$this->tokenProvider
+			->expects($this->once())
+			->method('getToken')
+			->with('SessionId')
+			->willReturn($myToken);
+		$this->tokenProvider
+			->expects($this->once())
+			->method('getPassword')
+			->with($myToken, 'SessionId')
+			->willThrowException(new PasswordlessTokenException());
+		$this->random
+			->expects($this->once())
+			->method('generate')
+			->with(72)
+			->willReturn('MyGeneratedToken');
+		$user = $this->createMock(IUser::class);
+		$user
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('MyUid');
+		$this->userSession
+			->expects($this->once())
+			->method('getUser')
+			->willReturn($user);
+		$this->tokenProvider
+			->expects($this->once())
+			->method('generateToken')
+			->with(
+				'MyGeneratedToken',
+				'MyUid',
+				'MyLoginName',
+				null,
+				'unknown',
+				IToken::PERMANENT_TOKEN,
+				IToken::DO_NOT_REMEMBER
+			);
+		$this->request
+			->expects($this->once())
+			->method('getServerHost')
+			->willReturn('example.com');
+
+		$expected = new Http\RedirectResponse('nc://MyLoginName:MyGeneratedToken@example.com');
+		$this->assertEquals($expected, $this->clientFlowLoginController->generateAppPassword('MyStateToken'));
+	}
+}