also support saving the kerberos tickets in database

Signed-off-by: Robin Appelman <robin@icewind.nl>

.github/workflows/smb-kerberos.yml

@@ -100,3 +100,47 @@ jobs:
           FILEPATH=$(docker exec --user 33 apache ./occ log:file | grep "Log file:" | cut -d' ' -f3)
           echo "$FILEPATH:"
           docker exec --user 33 apache cat $FILEPATH
+
+  smb-kerberos-database-tests:
+    runs-on: ubuntu-latest
+
+    if: ${{ github.repository_owner != 'nextcloud-gmbh' }}
+
+    name: smb-kerberos-sso
+
+    steps:
+      - name: Checkout server
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+      - name: Checkout user_saml
+        uses: actions/checkout@v3
+        with:
+          repository: nextcloud/user_saml
+          path: apps/user_saml
+          ref: event-dispatcher
+      - name: Pull images
+        run: |
+          docker pull ghcr.io/icewind1991/samba-krb-test-dc
+          docker pull ghcr.io/icewind1991/samba-krb-test-apache
+          docker pull ghcr.io/icewind1991/samba-krb-test-client
+          docker tag ghcr.io/icewind1991/samba-krb-test-dc icewind1991/samba-krb-test-dc
+          docker tag ghcr.io/icewind1991/samba-krb-test-apache icewind1991/samba-krb-test-apache
+          docker tag ghcr.io/icewind1991/samba-krb-test-client icewind1991/samba-krb-test-client
+      - name: Setup AD-DC
+        run: |
+          DC_IP=$(apps/files_external/tests/sso-setup/start-dc.sh)
+          apps/files_external/tests/sso-setup/start-apache.sh $DC_IP $PWD -v $PWD/apps/files_external/tests/sso-setup/apache-session.conf:/etc/apache2/sites-enabled/000-default.conf
+          echo "DC_IP=$DC_IP" >> $GITHUB_ENV
+      - name: Set up Nextcloud
+        run: |
+          apps/files_external/tests/sso-setup/setup-sso-nc.sh smb::kerberos_sso_database
+      - name: Test SSO
+        run: |
+          apps/files_external/tests/sso-setup/test-sso-smb-session.sh ${{ env.DC_IP }}
+      - name: Show logs
+        if: failure()
+        run: |
+          FILEPATH=$(docker exec --user 33 apache ./occ log:file | grep "Log file:" | cut -d' ' -f3)
+          echo "$FILEPATH:"
+          docker exec --user 33 apache cat $FILEPATH

apps/files_external/composer/composer/autoload_classmap.php

@@ -54,6 +54,7 @@
     'OCA\\Files_External\\Lib\\Auth\\PublicKey\\RSAPrivateKey' => $baseDir . '/../lib/Lib/Auth/PublicKey/RSAPrivateKey.php',
     'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosApacheAuth' => $baseDir . '/../lib/Lib/Auth/SMB/KerberosApacheAuth.php',
     'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosAuth' => $baseDir . '/../lib/Lib/Auth/SMB/KerberosAuth.php',
+    'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosSsoDatabase' => $baseDir . '/../lib/Lib/Auth/SMB/KerberosSsoDatabase.php',
     'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosSsoSession' => $baseDir . '/../lib/Lib/Auth/SMB/KerberosSsoSession.php',
     'OCA\\Files_External\\Lib\\Backend\\AmazonS3' => $baseDir . '/../lib/Lib/Backend/AmazonS3.php',
     'OCA\\Files_External\\Lib\\Backend\\Backend' => $baseDir . '/../lib/Lib/Backend/Backend.php',

apps/files_external/composer/composer/autoload_static.php

@@ -69,6 +69,7 @@ class ComposerStaticInitFiles_External
         'OCA\\Files_External\\Lib\\Auth\\PublicKey\\RSAPrivateKey' => __DIR__ . '/..' . '/../lib/Lib/Auth/PublicKey/RSAPrivateKey.php',
         'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosApacheAuth' => __DIR__ . '/..' . '/../lib/Lib/Auth/SMB/KerberosApacheAuth.php',
         'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosAuth' => __DIR__ . '/..' . '/../lib/Lib/Auth/SMB/KerberosAuth.php',
+        'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosSsoDatabase' => __DIR__ . '/..' . '/../lib/Lib/Auth/SMB/KerberosSsoDatabase.php',
         'OCA\\Files_External\\Lib\\Auth\\SMB\\KerberosSsoSession' => __DIR__ . '/..' . '/../lib/Lib/Auth/SMB/KerberosSsoSession.php',
         'OCA\\Files_External\\Lib\\Backend\\AmazonS3' => __DIR__ . '/..' . '/../lib/Lib/Backend/AmazonS3.php',
         'OCA\\Files_External\\Lib\\Backend\\Backend' => __DIR__ . '/..' . '/../lib/Lib/Backend/Backend.php',

apps/files_external/lib/AppInfo/Application.php

@@ -50,6 +50,7 @@
 use OCA\Files_External\Lib\Auth\PublicKey\RSAPrivateKey;
 use OCA\Files_External\Lib\Auth\SMB\KerberosApacheAuth;
 use OCA\Files_External\Lib\Auth\SMB\KerberosAuth;
+use OCA\Files_External\Lib\Auth\SMB\KerberosSsoDatabase;
 use OCA\Files_External\Lib\Auth\SMB\KerberosSsoSession;
 use OCA\Files_External\Lib\Backend\AmazonS3;
 use OCA\Files_External\Lib\Backend\DAV;
@@ -180,6 +181,7 @@ public function getAuthMechanisms() {
 			$container->get(KerberosAuth::class),
 			$container->get(KerberosApacheAuth::class),
 			$container->get(KerberosSsoSession::class),
+			$container->get(KerberosSsoDatabase::class),
 		];
 	}
 }

apps/files_external/lib/Lib/Auth/SMB/KerberosSsoDatabase.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
+ *
+ * @author Robin Appelman <robin@icewind.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 OCA\Files_External\Lib\Auth\SMB;
+
+use Icewind\SMB\KerberosTicket;
+use OCA\Files_External\Lib\Auth\AuthMechanism;
+use OCA\Files_External\Lib\DefinitionParameter;
+use OCA\Files_External\Lib\InsufficientDataForMeaningfulAnswerException;
+use OCP\IL10N;
+use OCP\ISession;
+use OCP\IUser;
+use OCP\Security\ICredentialsManager;
+
+class KerberosSsoDatabase extends AuthMechanism {
+	private ICredentialsManager $credentialsManager;
+
+	public function __construct(IL10N $l, ICredentialsManager $credentialsManager) {
+		$realm = new DefinitionParameter('default_realm', 'Default realm');
+		$realm
+			->setType(DefinitionParameter::VALUE_TEXT)
+			->setFlag(DefinitionParameter::FLAG_OPTIONAL)
+			->setTooltip($l->t('Kerberos default realm, defaults to "WORKGROUP"'));
+		$this
+			->setIdentifier('smb::kerberos_sso_database')
+			->setScheme(self::SCHEME_SMB)
+			->setText($l->t('Kerberos ticket SSO, save in database'))
+			->addParameter($realm);
+		$this->credentialsManager = $credentialsManager;
+	}
+
+	public function getTicket(?IUser $user): KerberosTicket {
+		if (!isset($user)) {
+			throw new InsufficientDataForMeaningfulAnswerException('No kerberos ticket saved');
+		}
+		try {
+			$envTicket = KerberosTicket::fromEnv();
+		} catch (\Exception $e) {
+			$envTicket = null;
+		}
+		if ($envTicket) {
+			$this->credentialsManager->store($user->getUID(), 'kerberos_ticket', base64_encode($envTicket->save()));
+			return $envTicket;
+		}
+
+		$savedTicket = $this->credentialsManager->retrieve($user->getUID(), 'kerberos_ticket');
+		if (!$savedTicket) {
+			throw new InsufficientDataForMeaningfulAnswerException('No kerberos ticket saved');
+		}
+		return KerberosTicket::load(base64_decode($savedTicket));
+	}
+}

apps/files_external/lib/Lib/Backend/SMB.php

@@ -34,6 +34,7 @@
 use OCA\Files_External\Lib\Auth\AuthMechanism;
 use OCA\Files_External\Lib\Auth\Password\Password;
 use OCA\Files_External\Lib\Auth\SMB\KerberosApacheAuth as KerberosApacheAuthMechanism;
+use OCA\Files_External\Lib\Auth\SMB\KerberosSsoDatabase;
 use OCA\Files_External\Lib\Auth\SMB\KerberosSsoSession;
 use OCA\Files_External\Lib\DefinitionParameter;
 use OCA\Files_External\Lib\InsufficientDataForMeaningfulAnswerException;
@@ -91,6 +92,13 @@ public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = n
 				case 'smb::kerberos':
 					$smbAuth = new KerberosAuth();
 					break;
+				case 'smb::kerberos_sso_database':
+					if (!$auth instanceof KerberosSsoDatabase) {
+						throw new \InvalidArgumentException('invalid authentication backend');
+					}
+					$smbAuth = new KerberosAuth();
+					$smbAuth->setTicket($auth->getTicket($user));
+					break;
 				case 'smb::kerberos_sso_session':
 					if (!$auth instanceof KerberosSsoSession) {
 						throw new \InvalidArgumentException('invalid authentication backend');

apps/files_external/lib/Lib/TicketSaveMiddleware.php

@@ -25,47 +25,67 @@
 
 use Icewind\SMB\KerberosTicket;
 use OCA\Files_External\Controller\UserGlobalStoragesController;
+use OCA\Files_External\Lib\Auth\SMB\KerberosSsoDatabase;
 use OCA\Files_External\Lib\Auth\SMB\KerberosSsoSession;
 use OCA\Files_External\Service\UserGlobalStoragesService;
 use OCP\AppFramework\Http\Response;
 use OCP\AppFramework\Middleware;
 use OCP\ISession;
+use OCP\IUser;
 use OCP\IUserSession;
+use OCP\Security\ICredentialsManager;
 
 class TicketSaveMiddleware extends Middleware {
+	const SAVE_SESSION = 1;
+	const SAVE_DB = 2;
+
 	private ISession $session;
 	private IUserSession $userSession;
 	private UserGlobalStoragesService $storagesService;
+	private ICredentialsManager $credentialsManager;
 
 	public function __construct(
 		ISession $session,
+		ICredentialsManager $credentialsManager,
 		IUserSession $userSession,
 		UserGlobalStoragesService $storagesService
 	) {
 		$this->session = $session;
+		$this->credentialsManager = $credentialsManager;
 		$this->userSession = $userSession;
 		$this->storagesService = $storagesService;
 	}
 
 	public function afterController($controller, $methodName, Response $response) {
+		$user = $this->userSession->getUser();
+		if (!$user) {
+			return $response;
+		}
 		$ticket = KerberosTicket::fromEnv();
-		if ($ticket && $ticket->isValid() && $this->needToSaveTicket()) {
-			$this->session->set('kerberos_ticket', base64_encode($ticket->save()));
+		if ($ticket && $ticket->isValid()) {
+			$save = $this->needToSaveTicket($user);
+			if ($save & self::SAVE_SESSION) {
+				$this->session->set('kerberos_ticket', base64_encode($ticket->save()));
+			}
+			if ($save & self::SAVE_DB) {
+				$this->credentialsManager->store($user->getUID(), 'kerberos_ticket', base64_encode($ticket->save()));
+			}
 		}
 		return $response;
 	}
 
-	private function needToSaveTicket(): bool {
-		$user = $this->userSession->getUser();
-		if (!$user) {
-			return false;
-		}
+	private function needToSaveTicket(IUser $user): int {
+		$save = 0;
 		$storages = $this->storagesService->getAllStoragesForUser($user);
 		foreach ($storages as $storage) {
-			if ($storage->getAuthMechanism() instanceof KerberosSsoSession) {
-				return true;
+			$auth = $storage->getAuthMechanism();
+			if ($auth instanceof KerberosSsoSession) {
+				$save = $save | self::SAVE_SESSION;
+			}
+			if ($auth instanceof KerberosSsoDatabase) {
+				$save = $save | self::SAVE_DB;
 			}
 		}
-		return false;
+		return $save;
 	}
 }