Allow SSO authentication to provide a user secret

Implementing PR #24837 from immerda

Signed-off-by: MichaIng <[email protected]>

Author: MichaIng

lib/composer/composer/autoload_classmap.php

@@ -89,6 +89,7 @@
     'OCP\\Authentication\\Exceptions\\PasswordUnavailableException' => $baseDir . '/lib/public/Authentication/Exceptions/PasswordUnavailableException.php',
     'OCP\\Authentication\\IAlternativeLogin' => $baseDir . '/lib/public/Authentication/IAlternativeLogin.php',
     'OCP\\Authentication\\IApacheBackend' => $baseDir . '/lib/public/Authentication/IApacheBackend.php',
+    'OCP\\Authentication\\IProvideUserSecretBackend' => $baseDir . '/lib/public/Authentication/IProvideUserSecretBackend.php',
     'OCP\\Authentication\\LoginCredentials\\ICredentials' => $baseDir . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
     'OCP\\Authentication\\LoginCredentials\\IStore' => $baseDir . '/lib/public/Authentication/LoginCredentials/IStore.php',
     'OCP\\Authentication\\TwoFactorAuth\\ALoginSetupController' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/ALoginSetupController.php',

lib/composer/composer/autoload_static.php

@@ -118,6 +118,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\Authentication\\Exceptions\\PasswordUnavailableException' => __DIR__ . '/../../..' . '/lib/public/Authentication/Exceptions/PasswordUnavailableException.php',
         'OCP\\Authentication\\IAlternativeLogin' => __DIR__ . '/../../..' . '/lib/public/Authentication/IAlternativeLogin.php',
         'OCP\\Authentication\\IApacheBackend' => __DIR__ . '/../../..' . '/lib/public/Authentication/IApacheBackend.php',
+        'OCP\\Authentication\\IProvideUserSecretBackend' => __DIR__ . '/../../..' . '/lib/public/Authentication/IProvideUserSecretBackend.php',
         'OCP\\Authentication\\LoginCredentials\\ICredentials' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
         'OCP\\Authentication\\LoginCredentials\\IStore' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/IStore.php',
         'OCP\\Authentication\\TwoFactorAuth\\ALoginSetupController' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/ALoginSetupController.php',

lib/private/legacy/OC_User.php

@@ -178,7 +178,11 @@ public static function loginWithApache(\OCP\Authentication\IApacheBackend $backe
 				}
 				$userSession->setLoginName($uid);
 				$request = OC::$server->getRequest();
-				$userSession->createSessionToken($request, $uid, $uid);
+				$password = null;
+				if ($backend instanceof \OCP\Authentication\IProvideUserSecretBackend) {
+					$password = $backend->getCurrentUserSecret();
+				}
+				$userSession->createSessionToken($request, $uid, $uid, $password);
 				// setup the filesystem
 				OC_Util::setupFS($uid);
 				// first call the post_login hooks, the login-process needs to be
@@ -190,7 +194,7 @@ public static function loginWithApache(\OCP\Authentication\IApacheBackend $backe
 					'post_login',
 					[
 						'uid' => $uid,
-						'password' => null,
+						'password' => $password,
 						'isTokenLogin' => false,
 					]
 				);

lib/public/Authentication/IProvideUserSecretBackend.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * @copyright Copyright (c) 2021, MichaIng <[email protected]>
+ *
+ * @author MichaIng <[email protected]>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+// use OCP namespace for all classes that are considered public.
+// This means that they should be used by apps instead of the internal ownCloud classes
+
+namespace OCP\Authentication;
+
+/**
+ * Interface IProvideUserSecretBackend
+ *
+ * @since 23.0.0
+ */
+interface IProvideUserSecretBackend {
+
+	/**
+	 * Optionally returns a stable per-user secret. This secret is for
+	 * instance used to secure file encryption keys.
+	 * @return string
+	 * @since 23.0.0
+	 */
+	public function getCurrentUserSecret(): string;
+}