fix(Session): avoid password confirmation on SSO

SSO backends like SAML and OIDC tried a trick to suppress password
confirmations as they are not possible by design. At least for SAML it was
not reliable when existing user backends where used as user repositories.

Now we are setting a special scope with the token, and also make sure that
the scope is taken over when tokens are regenerated.

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

core/Controller/OCJSController.php

@@ -6,6 +6,7 @@
 namespace OC\Core\Controller;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\CapabilitiesManager;
 use OC\Template\JSConfigHelper;
 use OCP\App\IAppManager;
@@ -42,6 +43,7 @@ class OCJSController extends Controller {
 		IURLGenerator $urlGenerator,
 		CapabilitiesManager $capabilitiesManager,
 		IInitialStateService $initialStateService,
+		IProvider $tokenProvider,
 	) {
 		parent::__construct($appName, $request);
 
@@ -56,7 +58,8 @@ class OCJSController extends Controller {
 			$iniWrapper,
 			$urlGenerator,
 			$capabilitiesManager,
-			$initialStateService
+			$initialStateService,
+			$tokenProvider
 		);
 	}
 

lib/private/AppFramework/DependencyInjection/DIContainer.php

@@ -249,7 +249,8 @@ class DIContainer extends SimpleContainer implements IAppContainer {
 					$c->get(IControllerMethodReflector::class),
 					$c->get(ISession::class),
 					$c->get(IUserSession::class),
-					$c->get(ITimeFactory::class)
+					$c->get(ITimeFactory::class),
+					$c->get(\OC\Authentication\Token\IProvider::class),
 				)
 			);
 			$dispatcher->registerMiddleware(

lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php

@@ -7,12 +7,17 @@ namespace OC\AppFramework\Middleware\Security;
 
 use OC\AppFramework\Middleware\Security\Exceptions\NotConfirmedException;
 use OC\AppFramework\Utility\ControllerMethodReflector;
+use OC\Authentication\Token\IProvider;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\Attribute\PasswordConfirmationRequired;
 use OCP\AppFramework\Middleware;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Authentication\Exceptions\ExpiredTokenException;
+use OCP\Authentication\Exceptions\InvalidTokenException;
+use OCP\Authentication\Exceptions\WipeTokenException;
 use OCP\ISession;
 use OCP\IUserSession;
+use OCP\Session\Exceptions\SessionNotAvailableException;
 use OCP\User\Backend\IPasswordConfirmationBackend;
 use ReflectionMethod;
 
@@ -27,6 +32,7 @@ class PasswordConfirmationMiddleware extends Middleware {
 	private $timeFactory;
 	/** @var array */
 	private $excludedUserBackEnds = ['user_saml' => true, 'user_globalsiteselector' => true];
+	private IProvider $tokenProvider;
 
 	/**
 	 * PasswordConfirmationMiddleware constructor.
@@ -39,11 +45,14 @@ class PasswordConfirmationMiddleware extends Middleware {
 	public function __construct(ControllerMethodReflector $reflector,
 		ISession $session,
 		IUserSession $userSession,
-		ITimeFactory $timeFactory) {
+		ITimeFactory $timeFactory,
+		IProvider $tokenProvider,
+	) {
 		$this->reflector = $reflector;
 		$this->session = $session;
 		$this->userSession = $userSession;
 		$this->timeFactory = $timeFactory;
+		$this->tokenProvider = $tokenProvider;
 	}
 
 	/**
@@ -68,8 +77,21 @@ class PasswordConfirmationMiddleware extends Middleware {
 				$backendClassName = $user->getBackendClassName();
 			}
 
+			try {
+				$sessionId = $this->session->getId();
+				$token = $this->tokenProvider->getToken($sessionId);
+			} catch (SessionNotAvailableException|InvalidTokenException|WipeTokenException|ExpiredTokenException) {
+				// States we do not deal with here.
+				return;
+			}
+			$scope = $token->getScopeAsArray();
+			if (isset($scope['sso-based-login']) && $scope['sso-based-login'] === true) {
+				// Users logging in from SSO backends cannot confirm their password by design
+				return;
+			}
+
 			$lastConfirm = (int) $this->session->get('last-password-confirm');
-			// we can't check the password against a SAML backend, so skip password confirmation in this case
+			// TODO: confirm excludedUserBackEnds can go away and remove it
 			if (!isset($this->excludedUserBackEnds[$backendClassName]) && $lastConfirm < ($this->timeFactory->getTime() - (30 * 60 + 15))) { // allow 15 seconds delay
 				throw new NotConfirmedException();
 			}

lib/private/Authentication/Token/PublicKeyTokenProvider.php

@@ -243,6 +243,7 @@ class PublicKeyTokenProvider implements IProvider {
 				OCPIToken::TEMPORARY_TOKEN,
 				$token->getRemember()
 			);
+			$newToken->setScope($token->getScopeAsArray());
 			$this->cacheToken($newToken);
 
 			$this->cacheInvalidHash($token->getToken());

lib/private/Template/JSConfigHelper.php

@@ -8,10 +8,14 @@ declare(strict_types=1);
 namespace OC\Template;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\CapabilitiesManager;
 use OC\Share\Share;
 use OCP\App\AppPathNotFoundException;
 use OCP\App\IAppManager;
+use OCP\Authentication\Exceptions\ExpiredTokenException;
+use OCP\Authentication\Exceptions\InvalidTokenException;
+use OCP\Authentication\Exceptions\WipeTokenException;
 use OCP\Constants;
 use OCP\Defaults;
 use OCP\Files\FileInfo;
@@ -23,48 +27,30 @@ use OCP\ILogger;
 use OCP\ISession;
 use OCP\IURLGenerator;
 use OCP\IUser;
+use OCP\Session\Exceptions\SessionNotAvailableException;
 use OCP\Share\IManager as IShareManager;
 use OCP\User\Backend\IPasswordConfirmationBackend;
 use OCP\Util;
 
 class JSConfigHelper {
-	protected IL10N $l;
-	protected Defaults $defaults;
-	protected IAppManager $appManager;
-	protected ISession $session;
-	protected ?IUser $currentUser;
-	protected IConfig $config;
-	protected IGroupManager $groupManager;
-	protected IniGetWrapper $iniWrapper;
-	protected IURLGenerator $urlGenerator;
-	protected CapabilitiesManager $capabilitiesManager;
-	protected IInitialStateService $initialStateService;
 
 	/** @var array user back-ends excluded from password verification */
 	private $excludedUserBackEnds = ['user_saml' => true, 'user_globalsiteselector' => true];
 
-	public function __construct(IL10N $l,
-		Defaults $defaults,
-		IAppManager $appManager,
-		ISession $session,
-		?IUser $currentUser,
-		IConfig $config,
-		IGroupManager $groupManager,
-		IniGetWrapper $iniWrapper,
-		IURLGenerator $urlGenerator,
-		CapabilitiesManager $capabilitiesManager,
-		IInitialStateService $initialStateService) {
-		$this->l = $l;
-		$this->defaults = $defaults;
-		$this->appManager = $appManager;
-		$this->session = $session;
-		$this->currentUser = $currentUser;
-		$this->config = $config;
-		$this->groupManager = $groupManager;
-		$this->iniWrapper = $iniWrapper;
-		$this->urlGenerator = $urlGenerator;
-		$this->capabilitiesManager = $capabilitiesManager;
-		$this->initialStateService = $initialStateService;
+	public function __construct(
+		protected IL10N                $l,
+		protected Defaults             $defaults,
+		protected IAppManager          $appManager,
+		protected ISession             $session,
+		protected ?IUser               $currentUser,
+		protected IConfig              $config,
+		protected IGroupManager        $groupManager,
+		protected IniGetWrapper        $iniWrapper,
+		protected IURLGenerator        $urlGenerator,
+		protected CapabilitiesManager  $capabilitiesManager,
+		protected IInitialStateService $initialStateService,
+		protected IProvider            $tokenProvider,
+	) {
 	}
 
 	public function getConfig(): string {
@@ -130,9 +116,13 @@ class JSConfigHelper {
 		}
 
 		if ($this->currentUser instanceof IUser) {
-			$lastConfirmTimestamp = $this->session->get('last-password-confirm');
-			if (!is_int($lastConfirmTimestamp)) {
-				$lastConfirmTimestamp = 0;
+			if ($this->canUserValidatePassword()) {
+				$lastConfirmTimestamp = $this->session->get('last-password-confirm');
+				if (!is_int($lastConfirmTimestamp)) {
+					$lastConfirmTimestamp = 0;
+				}
+			} else {
+				$lastConfirmTimestamp = PHP_INT_MAX;
 			}
 		} else {
 			$lastConfirmTimestamp = 0;
@@ -287,4 +277,15 @@ class JSConfigHelper {
 
 		return $result;
 	}
+
+	protected function canUserValidatePassword(): bool {
+		try {
+			$token = $this->tokenProvider->getToken($this->session->getId());
+		} catch (ExpiredTokenException|WipeTokenException|InvalidTokenException|SessionNotAvailableException) {
+			// actually we do not know, so we fall back to this statement
+			return true;
+		}
+		$scope = $token->getScopeAsArray();
+		return !isset($scope['sso-based-login']) || $scope['sso-based-login'] === false;
+	}
 }

lib/private/TemplateLayout.php

@@ -8,6 +8,7 @@
 namespace OC;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\Search\SearchQuery;
 use OC\Template\CSSResourceLocator;
 use OC\Template\JSConfigHelper;
@@ -224,7 +225,8 @@ class TemplateLayout extends \OC_Template {
 				\OC::$server->get(IniGetWrapper::class),
 				\OC::$server->getURLGenerator(),
 				\OC::$server->get(CapabilitiesManager::class),
-				\OCP\Server::get(IInitialStateService::class)
+				\OCP\Server::get(IInitialStateService::class),
+				\OCP\Server::get(IProvider::class),
 			);
 			$config = $jsConfigHelper->getConfig();
 			if (\OC::$server->getContentSecurityPolicyNonceManager()->browserSupportsCspV3()) {

lib/private/legacy/OC_User.php

@@ -5,6 +5,7 @@
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
+use OC\Authentication\Token\IProvider;
 use OC\User\LoginException;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IGroupManager;
@@ -166,6 +167,14 @@ class OC_User {
 
 				$userSession->createSessionToken($request, $uid, $uid, $password);
 				$userSession->createRememberMeToken($userSession->getUser());
+
+				if (empty($password)) {
+					$tokenProvider = \OC::$server->get(IProvider::class);
+					$token = $tokenProvider->getToken($userSession->getSession()->getId());
+					$token->setScope(['sso-based-login' => true]);
+					$tokenProvider->updateToken($token);
+				}
+
 				// setup the filesystem
 				OC_Util::setupFS($uid);
 				// first call the post_login hooks, the login-process needs to be

tests/lib/AppFramework/Middleware/Security/Mock/PasswordConfirmationMiddlewareController.php

@@ -30,4 +30,8 @@ class PasswordConfirmationMiddlewareController extends \OCP\AppFramework\Control
 	#[PasswordConfirmationRequired]
 	public function testAttribute() {
 	}
+
+	#[PasswordConfirmationRequired]
+	public function testSSO() {
+	}
 }

tests/lib/AppFramework/Middleware/Security/PasswordConfirmationMiddlewareTest.php

@@ -9,7 +9,9 @@ namespace Test\AppFramework\Middleware\Security;
 use OC\AppFramework\Middleware\Security\Exceptions\NotConfirmedException;
 use OC\AppFramework\Middleware\Security\PasswordConfirmationMiddleware;
 use OC\AppFramework\Utility\ControllerMethodReflector;
+use OC\Authentication\Token\IProvider;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Authentication\Token\IToken;
 use OCP\IRequest;
 use OCP\ISession;
 use OCP\IUser;
@@ -32,6 +34,7 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 	private $controller;
 	/** @var ITimeFactory|\PHPUnit\Framework\MockObject\MockObject */
 	private $timeFactory;
+	private IProvider|\PHPUnit\Framework\MockObject\MockObject $tokenProvider;
 
 	protected function setUp(): void {
 		$this->reflector = new ControllerMethodReflector();
@@ -39,6 +42,7 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->user = $this->createMock(IUser::class);
 		$this->timeFactory = $this->createMock(ITimeFactory::class);
+		$this->tokenProvider = $this->createMock(IProvider::class);
 		$this->controller = new PasswordConfirmationMiddlewareController(
 			'test',
 			$this->createMock(IRequest::class)
@@ -48,7 +52,8 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 			$this->reflector,
 			$this->session,
 			$this->userSession,
-			$this->timeFactory
+			$this->timeFactory,
+			$this->tokenProvider,
 		);
 	}
 
@@ -90,6 +95,13 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 		$this->timeFactory->method('getTime')
 			->willReturn($currentTime);
 
+		$token = $this->createMock(IToken::class);
+		$token->method('getScopeAsArray')
+			->willReturn([]);
+		$this->tokenProvider->expects($this->once())
+			->method('getToken')
+			->willReturn($token);
+
 		$thrown = false;
 		try {
 			$this->middleware->beforeController($this->controller, __FUNCTION__);
@@ -118,6 +130,13 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 		$this->timeFactory->method('getTime')
 			->willReturn($currentTime);
 
+		$token = $this->createMock(IToken::class);
+		$token->method('getScopeAsArray')
+			->willReturn([]);
+		$this->tokenProvider->expects($this->once())
+			->method('getToken')
+			->willReturn($token);
+
 		$thrown = false;
 		try {
 			$this->middleware->beforeController($this->controller, __FUNCTION__);
@@ -128,6 +147,8 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 		$this->assertSame($exception, $thrown);
 	}
 
+
+
 	public function dataProvider() {
 		return [
 			['foo', 2000, 4000, true],
@@ -138,4 +159,41 @@ class PasswordConfirmationMiddlewareTest extends TestCase {
 			['foo', 2000, 3816, true],
 		];
 	}
+
+	public function testSSO() {
+		static $sessionId = 'mySession1d';
+
+		$this->reflector->reflect($this->controller, __FUNCTION__);
+
+		$this->user->method('getBackendClassName')
+			->willReturn('fictional_backend');
+		$this->userSession->method('getUser')
+			->willReturn($this->user);
+
+		$this->session->method('get')
+			->with('last-password-confirm')
+			->willReturn(0);
+		$this->session->method('getId')
+			->willReturn($sessionId);
+
+		$this->timeFactory->method('getTime')
+			->willReturn(9876);
+
+		$token = $this->createMock(IToken::class);
+		$token->method('getScopeAsArray')
+			->willReturn(['sso-based-login' => true]);
+		$this->tokenProvider->expects($this->once())
+			->method('getToken')
+			->with($sessionId)
+			->willReturn($token);
+
+		$thrown = false;
+		try {
+			$this->middleware->beforeController($this->controller, __FUNCTION__);
+		} catch (NotConfirmedException) {
+			$thrown = true;
+		}
+
+		$this->assertSame(false, $thrown);
+	}
 }