OP#40534 only allow user to connect via OAuth (#35)

* directly connect by OAuth from dashboard and file details

and only allow oAuth connection for user

Signed-off-by: Artur Neumann <artur@jankaritech.com>

README.md

@@ -7,20 +7,7 @@ a search provider for work packages and notifications for changes in active work
 
 ### :lock: Authentication
 
-To access data in OpenProject on behalf of the user this app needs to authenticate to OpenProject as the respective user.
-
-This can happen either through a personal access token or the OAuth workflow. Both ways to authenticate have their own advantages and disadvantages.
-
-Using a personal access token enables every NextCloud user to connect to an OpenProject instance of their choice because no configuration needs to be changed by the NextCloud or OpenProject admin (except for installing and enabling this app).
-On the other hand every user has to perform a series of manual steps to connect NextCloud to OpenProject the first time. Also, this is the less secure way of authentication. If the API Key gets leaked the attacker can do any actions on OpenProject as if they had been done by the legitimate user. Even though the key can be reset, it usually stays the same for a long time. If an attacker gets even short-time access to the NextCloud system or access to a message transferred between NextCloud and OpenProject he could misuse that knowledge for as long as the API key stays unchanged.
-
-Using the OAuth authentication is much easier for every user, but requires the NextCloud admin and the OpenProject admin to configure both apps.
-OAuth is also the much safer option to connect both apps and therefore the recommended way to use this app.
-To give access to OpenProject the first time the user needs to log-in with the OpenProject credentials and actively approve the connection. In the result a user-token will be generated automatically and exchanged between NextCloud and OpenProject. This token will be refreshed on a regular basis, so if an attacker gains access to a message transferred between NextCloud and OpenProject it can be only misused till the next refreshing of the token happens.
-
-The account configuration happens in the "Connected accounts" user settings section. A link to the "Connected accounts" user settings section will be displayed in the widget for users who didn't configure an OpenProject account.
-
-#### OAuth
+To access data in OpenProject on behalf of the user this app needs to authenticate to OpenProject as the respective user. This happens using the OAuth workflow. (Using a personal access token is deprecated and not possible anymore.)
 
 1. As an OpenProject admin create an OAuth app
 	1. in OpenProject go to "Administration" -> "Authentication" -> "OAuth applications"
@@ -31,28 +18,14 @@ The account configuration happens in the "Connected accounts" user settings sect
 	1. in NextCloud go to "Settings" -> "Personal" -> "Connected accounts"
 	2. provide the OpenProject address, the Client ID and the Client Secret
 3. As an NextCloud user connect to OpenProject
-	1. in NextCloud go to "Settings" -> "Personal" -> "Connected accounts"
-	2. provide the OpenProject address (it has to be exactly the same as provided by the administrator in step 2)
-	3. a new button `Connect to OpenProject` should be visible
-	4. click `Connect to OpenProject`
-	5. you will be redirected to OpenProject
-	6. log-in to OpenProject if you haven't already
-	7. Authorize the NextCloud App
-	8. you will be redirected back to NextCloud
-
-#### Personal access token (NOT recommended)
-
-1. As an OpenProject user get an access token (API key)
-   1. in OpenProject click on your user image in the top right corner
-   2. go to "My account" -> "Access token"
-   3. click on "Generate" button in the "API" row. If there is no "Generate" button you have already created an API token for this user and in case you don't know it any-more you can always create a new one by clicking "Reset", but this will invalidate any old token.
-   4. note down the API token that is displayed
-2. As an NextCloud user connect to OpenProject
-   1. in NextCloud go to "Settings" -> "Personal" -> "Connected accounts"
-   2. provide the OpenProject address
-   3. enter or copy the OpenProject API token into the "Access token" field
-   4. after a short time the app will try to establish the connection to OpenProject and if all worked correctly it will display the status: "Connected as <fullname of user in OpenProject>"
-
+    1. click the `Connect to OpenProject` button that you can find on:
+       - the OpenProject dashboard widget
+       - the OpenProject tab in the details of every file
+       - "Settings" -> "Personal" -> "Connected accounts"
+    2. you will be redirected to OpenProject
+    3. log-in to OpenProject if you haven't already
+    4. Authorize the NextCloud App
+    5. you will be redirected back to NextCloud
 
 #### Background jobs
 

lib/AppInfo/Application.php

@@ -77,7 +77,7 @@ public function registerNavigation(IUserSession $userSession): void {
 			$container = $this->getContainer();
 
 			if ($this->config->getUserValue($userId, self::APP_ID, 'navigation_enabled', '0') === '1') {
-				$openprojectUrl = $this->config->getUserValue($userId, self::APP_ID, 'url', '');
+				$openprojectUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url', '');
 				if ($openprojectUrl !== '') {
 					$container->get(INavigationManager::class)->add(function () use ($container, $openprojectUrl) {
 						$urlGenerator = $container->get(IURLGenerator::class);

lib/Controller/ConfigController.php

@@ -128,7 +128,7 @@ public function oauthRedirect(string $code = '', string $state = ''): RedirectRe
 
 		if ($clientID && $clientSecret && $configState !== '' && $configState === $state) {
 			$redirect_uri = $this->config->getUserValue($this->userId, Application::APP_ID, 'redirect_uri');
-			$openprojectUrl = $this->config->getUserValue($this->userId, Application::APP_ID, 'url');
+			$openprojectUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url');
 			$result = $this->openprojectAPIService->requestOAuthAccessToken($openprojectUrl, [
 				'client_id' => $clientID,
 				'client_secret' => $clientSecret,
@@ -178,7 +178,7 @@ private function storeUserInfo(string $accessToken): array {
 		$refreshToken = $this->config->getUserValue($this->userId, Application::APP_ID, 'refresh_token');
 		$clientID = $this->config->getAppValue(Application::APP_ID, 'client_id');
 		$clientSecret = $this->config->getAppValue(Application::APP_ID, 'client_secret');
-		$openprojectUrl = $this->config->getUserValue($this->userId, Application::APP_ID, 'url');
+		$openprojectUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url');
 
 		if (!$openprojectUrl || !OpenProjectAPIService::validateOpenProjectURL($openprojectUrl)) {
 			return ['error' => 'OpenProject URL is invalid'];

lib/Controller/OpenProjectAPIController.php

@@ -69,7 +69,7 @@ public function __construct(string $appName,
 		$this->refreshToken = $config->getUserValue($userId, Application::APP_ID, 'refresh_token');
 		$this->clientID = $config->getAppValue(Application::APP_ID, 'client_id');
 		$this->clientSecret = $config->getAppValue(Application::APP_ID, 'client_secret');
-		$this->openprojectUrl = $config->getUserValue($userId, Application::APP_ID, 'url');
+		$this->openprojectUrl = $config->getAppValue(Application::APP_ID, 'oauth_instance_url');
 	}
 
 	/**

lib/Dashboard/OpenProjectWidget.php

@@ -23,7 +23,10 @@
 
 namespace OCA\OpenProject\Dashboard;
 
+use OCA\OpenProject\Service\OpenProjectAPIService;
+use OCP\AppFramework\Services\IInitialState;
 use OCP\Dashboard\IWidget;
+use OCP\IConfig;
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\Util;
@@ -32,17 +35,33 @@
 
 class OpenProjectWidget implements IWidget {
 
-	/** @var IL10N */
+	/**
+	 * @var IL10N
+	 */
 	private $l10n;
 	/**
 	 * @var IURLGenerator
 	 */
 	private $url;
+	/**
+	 * @var IInitialState
+	 */
+	private $initialStateService;
+	/**
+	 * @var IConfig
+	 */
+	private $config;
 
-	public function __construct(IL10N $l10n,
-								IURLGenerator $url) {
+	public function __construct(
+		IL10N $l10n,
+		IInitialState $initialStateService,
+		IURLGenerator $url,
+		IConfig $config
+	) {
+		$this->initialStateService = $initialStateService;
 		$this->l10n = $l10n;
 		$this->url = $url;
+		$this->config = $config;
 	}
 
 	/**
@@ -86,5 +105,7 @@ public function getUrl(): ?string {
 	public function load(): void {
 		Util::addScript(Application::APP_ID, Application::APP_ID . '-dashboard');
 		Util::addStyle(Application::APP_ID, 'dashboard');
+		$requestUrl = OpenProjectAPIService::getOpenProjectOauthURL($this->config, $this->url);
+		$this->initialStateService->provideInitialState('request-url', $requestUrl);
 	}
 }

lib/Listener/LoadSidebarScript.php

@@ -28,11 +28,39 @@
 
 use OCA\Files\Event\LoadSidebar;
 use OCA\OpenProject\AppInfo\Application;
+use OCA\OpenProject\Service\OpenProjectAPIService;
+use OCP\AppFramework\Services\IInitialState;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventListener;
+use OCP\IConfig;
+use OCP\IURLGenerator;
 use OCP\Util;
 
 class LoadSidebarScript implements IEventListener {
+
+	/**
+	 * @var IURLGenerator
+	 */
+	private $url;
+	/**
+	 * @var IInitialState
+	 */
+	private $initialStateService;
+	/**
+	 * @var IConfig
+	 */
+	private $config;
+
+	public function __construct(
+		IInitialState $initialStateService,
+		IURLGenerator $url,
+		IConfig $config
+	) {
+		$this->initialStateService = $initialStateService;
+		$this->config = $config;
+		$this->url = $url;
+	}
+
 	public function handle(Event $event): void {
 		if (!($event instanceof LoadSidebar)) {
 			return;
@@ -46,5 +74,7 @@ public function handle(Event $event): void {
 			Util::addScript(Application::APP_ID, 'integration_openproject-projectTab');
 		}
 		Util::addStyle(Application::APP_ID, 'tab');
+		$requestUrl = OpenProjectAPIService::getOpenProjectOauthURL($this->config, $this->url);
+		$this->initialStateService->provideInitialState('request-url', $requestUrl);
 	}
 }

lib/Search/OpenProjectSearchProvider.php

@@ -124,7 +124,7 @@ public function search(IUser $user, ISearchQuery $query): SearchResult {
 			? $svgUrl . '?color=ffffff'
 			: $svgUrl . '?color=000000';
 
-		$openprojectUrl = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'url');
+		$openprojectUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url');
 		$accessToken = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'token');
 		$tokenType = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'token_type');
 		$refreshToken = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'refresh_token');

lib/Service/OpenProjectAPIService.php

@@ -15,6 +15,7 @@
 use DateTimeZone;
 use Exception;
 use OCP\IL10N;
+use OCP\IURLGenerator;
 use Psr\Log\LoggerInterface;
 use OCP\IConfig;
 use OCP\IUserManager;
@@ -108,7 +109,7 @@ private function checkNotificationsForUser(string $userId): void {
 			$refreshToken = $this->config->getUserValue($userId, Application::APP_ID, 'refresh_token');
 			$clientID = $this->config->getAppValue(Application::APP_ID, 'client_id');
 			$clientSecret = $this->config->getAppValue(Application::APP_ID, 'client_secret');
-			$openprojectUrl = $this->config->getUserValue($userId, Application::APP_ID, 'url');
+			$openprojectUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url');
 			if ($clientID && $clientSecret && $openprojectUrl) {
 				$lastNotificationCheck = $this->config->getUserValue($userId, Application::APP_ID, 'last_notification_check');
 				$lastNotificationCheck = $lastNotificationCheck === '' ? null : $lastNotificationCheck;
@@ -560,4 +561,23 @@ public function getOpenProjectWorkPackageType(
 
 		return $result;
 	}
+
+	/*
+	 * @param IConfig $config
+	 * @param IURLGenerator $urlGenerator
+	 * @return string
+	 * generates an oauth url to OpenProject containing client_id & redirect_uri as parameter
+	 * please note that the state parameter is still missing, that needs to be generated dynamically
+	 * and saved to the DB before calling the OAuth URI
+	 */
+	public static function getOpenProjectOauthURL(IConfig $config, IURLGenerator $urlGenerator): string {
+		$clientID = $config->getAppValue(Application::APP_ID, 'client_id');
+		$oauthUrl = $config->getAppValue(Application::APP_ID, 'oauth_instance_url');
+		$redirectUri = $urlGenerator->linkToRouteAbsolute(Application::APP_ID . '.config.oauthRedirect');
+		return $oauthUrl .
+			'/oauth/authorize' .
+			'?client_id=' . $clientID .
+			'&redirect_uri=' . urlencode($redirectUri) .
+			'&response_type=code';
+	}
 }

lib/Settings/Personal.php

@@ -5,9 +5,11 @@
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\AppFramework\Services\IInitialState;
 use OCP\IConfig;
+use OCP\IURLGenerator;
 use OCP\Settings\ISettings;
 
 use OCA\OpenProject\AppInfo\Application;
+use OCA\OpenProject\Service\OpenProjectAPIService;
 
 class Personal implements ISettings {
 
@@ -23,45 +25,42 @@ class Personal implements ISettings {
 	 * @var string|null
 	 */
 	private $userId;
+	/**
+	 * @var IURLGenerator
+	 */
+	private $url;
 
 	public function __construct(
 								IConfig $config,
 								IInitialState $initialStateService,
+								IURLGenerator $url,
 								?string $userId) {
 		$this->config = $config;
 		$this->initialStateService = $initialStateService;
+		$this->url = $url;
 		$this->userId = $userId;
 	}
 
 	/**
 	 * @return TemplateResponse
 	 */
 	public function getForm(): TemplateResponse {
-		$login = $this->config->getUserValue($this->userId, Application::APP_ID, 'login');
 		$token = $this->config->getUserValue($this->userId, Application::APP_ID, 'token');
 		$userName = $this->config->getUserValue($this->userId, Application::APP_ID, 'user_name');
-		$url = $this->config->getUserValue($this->userId, Application::APP_ID, 'url');
 		$searchEnabled = $this->config->getUserValue($this->userId, Application::APP_ID, 'search_enabled', '0');
 		$notificationEnabled = $this->config->getUserValue($this->userId, Application::APP_ID, 'notification_enabled', '0');
 		$navigationEnabled = $this->config->getUserValue($this->userId, Application::APP_ID, 'navigation_enabled', '0');
 
 		// for OAuth
-		$clientID = $this->config->getAppValue(Application::APP_ID, 'client_id');
-		// don't expose the client secret to users
-		$clientSecret = ($this->config->getAppValue(Application::APP_ID, 'client_secret') !== '');
-		$oauthUrl = $this->config->getAppValue(Application::APP_ID, 'oauth_instance_url');
+		$requestUrl = OpenProjectAPIService::getOpenProjectOauthURL($this->config, $this->url);
 
 		$userConfig = [
-			'login' => $login,
 			'token' => $token,
-			'url' => $url,
-			'client_id' => $clientID,
-			'client_secret' => $clientSecret,
-			'oauth_instance_url' => $oauthUrl,
 			'search_enabled' => ($searchEnabled === '1'),
 			'notification_enabled' => ($notificationEnabled === '1'),
 			'navigation_enabled' => ($navigationEnabled === '1'),
 			'user_name' => $userName,
+			'request_url' => $requestUrl,
 		];
 		$this->initialStateService->provideInitialState('user-config', $userConfig);
 		return new TemplateResponse(Application::APP_ID, 'personalSettings');

src/components/OAuthConnectButton.vue

@@ -0,0 +1,49 @@
+<template>
+	<button
+		class="openproject-oauth"
+		@click="onOAuthClick">
+		<span class="icon icon-external" />
+		{{ t('integration_openproject', 'Connect to OpenProject') }}
+	</button>
+</template>
+<script>
+import axios from '@nextcloud/axios'
+import { generateUrl } from '@nextcloud/router'
+import { showError } from '@nextcloud/dialogs'
+import { translate as t } from '@nextcloud/l10n'
+
+export default {
+	name: 'OAuthConnectButton',
+
+	props: {
+		requestUrl: {
+			type: String,
+			required: true,
+		},
+	},
+	methods: {
+		onOAuthClick() {
+			const oauthState = Math.random().toString(36).substring(3)
+			const requestUrl = this.requestUrl
+				+ '&state=' + encodeURIComponent(oauthState)
+
+			const req = {
+				values: {
+					oauth_state: oauthState,
+				},
+			}
+			const url = generateUrl('/apps/integration_openproject/config')
+			axios.put(url, req)
+				.then(() => {
+					window.location.replace(requestUrl)
+				})
+				.catch((error) => {
+					showError(
+						t('integration_openproject', 'Failed to save OpenProject OAuth state')
+						+ ': ' + error.message
+					)
+				})
+		},
+	},
+}
+</script>