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>
nextcloud · Mar 4, 2024 · 9ed2917 · 9ed2917
1 parent e0705f1
commit 9ed2917
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Showing 7 changed files with 62 additions and 41 deletions.
diff --git a/core/Controller/OCJSController.php b/core/Controller/OCJSController.php
@@ -29,6 +29,7 @@
 namespace OC\Core\Controller;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\CapabilitiesManager;
 use OC\Template\JSConfigHelper;
 use OCP\App\IAppManager;
@@ -65,6 +66,7 @@ public function __construct(
 		IURLGenerator $urlGenerator,
 		CapabilitiesManager $capabilitiesManager,
 		IInitialStateService $initialStateService,
+		IProvider $tokenProvider,
 	) {
 		parent::__construct($appName, $request);
 
@@ -79,7 +81,8 @@ public function __construct(
 			$iniWrapper,
 			$urlGenerator,
 			$capabilitiesManager,
-			$initialStateService
+			$initialStateService,
+			$tokenProvider
 		);
 	}
 

diff --git a/lib/private/AppFramework/DependencyInjection/DIContainer.php b/lib/private/AppFramework/DependencyInjection/DIContainer.php
@@ -276,7 +276,8 @@ public function __construct(string $appName, array $urlParams = [], ServerContai
 					$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(

diff --git a/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php b/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php
@@ -25,6 +25,7 @@
 
 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;
@@ -45,6 +46,7 @@ class PasswordConfirmationMiddleware extends Middleware {
 	private $timeFactory;
 	/** @var array */
 	private $excludedUserBackEnds = ['user_saml' => true, 'user_globalsiteselector' => true];
+	private IProvider $tokenProvider;
 
 	/**
 	 * PasswordConfirmationMiddleware constructor.
@@ -57,11 +59,14 @@ 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;
 	}
 
 	/**
@@ -86,8 +91,16 @@ public function beforeController($controller, $methodName) {
 				$backendClassName = $user->getBackendClassName();
 			}
 
+			$sessionId = $this->session->getId();
+			$token = $this->tokenProvider->getToken($sessionId);
+			$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();
 			}

diff --git a/lib/private/Authentication/Token/PublicKeyTokenProvider.php b/lib/private/Authentication/Token/PublicKeyTokenProvider.php
@@ -265,6 +265,7 @@ public function renewSessionToken(string $oldSessionId, string $sessionId): OCPI
 				OCPIToken::TEMPORARY_TOKEN,
 				$token->getRemember()
 			);
+			$newToken->setScope($token->getScopeAsArray());
 			$this->cacheToken($newToken);
 
 			$this->cacheInvalidHash($token->getToken());

diff --git a/lib/private/Template/JSConfigHelper.php b/lib/private/Template/JSConfigHelper.php
@@ -34,6 +34,7 @@
 namespace OC\Template;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\CapabilitiesManager;
 use OC\Share\Share;
 use OCP\App\AppPathNotFoundException;
@@ -53,43 +54,24 @@
 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 {
@@ -155,9 +137,13 @@ public function getConfig(): string {
 		}
 
 		if ($this->currentUser instanceof IUser) {
-			$lastConfirmTimestamp = $this->session->get('last-password-confirm');
-			if (!is_int($lastConfirmTimestamp)) {
-				$lastConfirmTimestamp = 0;
+			if ($this->isUserLoggedInViaSSO()) {
+				$lastConfirmTimestamp = PHP_INT_MAX;
+			} else {
+				$lastConfirmTimestamp = $this->session->get('last-password-confirm');
+				if (!is_int($lastConfirmTimestamp)) {
+					$lastConfirmTimestamp = 0;
+				}
 			}
 		} else {
 			$lastConfirmTimestamp = 0;
@@ -311,4 +297,10 @@ public function getConfig(): string {
 
 		return $result;
 	}
+
+	protected function isUserLoggedInViaSSO(): bool {
+		$token = $this->tokenProvider->getToken($this->session->getId());
+		$scope = $token->getScopeAsArray();
+		return isset($scope['sso-based-login']) && $scope['sso-based-login'] === true;
+	}
 }
diff --git a/lib/private/TemplateLayout.php b/lib/private/TemplateLayout.php
@@ -43,6 +43,7 @@
 namespace OC;
 
 use bantu\IniGetWrapper\IniGetWrapper;
+use OC\Authentication\Token\IProvider;
 use OC\Search\SearchQuery;
 use OC\Template\CSSResourceLocator;
 use OC\Template\JSConfigHelper;
@@ -259,7 +260,8 @@ public function __construct($renderAs, $appId = '') {
 				\OC::$server->get(IniGetWrapper::class),
 				\OC::$server->getURLGenerator(),
 				\OC::$server->getCapabilitiesManager(),
-				\OCP\Server::get(IInitialStateService::class)
+				\OCP\Server::get(IInitialStateService::class),
+				\OCP\Server::get(IProvider::class),
 			);
 			$config = $jsConfigHelper->getConfig();
 			if (\OC::$server->getContentSecurityPolicyNonceManager()->browserSupportsCspV3()) {

diff --git a/lib/private/legacy/OC_User.php b/lib/private/legacy/OC_User.php
@@ -36,6 +36,7 @@
  *
  */
 
+use OC\Authentication\Token\IProvider;
 use OC\User\LoginException;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IGroupManager;
@@ -196,6 +197,14 @@ public static function loginWithApache(\OCP\Authentication\IApacheBackend $backe
 
 				$userSession->createSessionToken($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