Add sabredav plugin to register environment auth for dav requests

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

appinfo/app.php

@@ -81,6 +81,12 @@ if($returnScript === true) {
 	return;
 }
 
+$app = new \OCA\User_SAML\AppInfo\Application();
+$dispatcher = \OC::$server->getEventDispatcher();
+if ($type === 'environment-variable') {
+	$app->registerDavAuth();
+}
+
 $redirectSituation = false;
 
 $user = $userSession->getUser();

lib/AppInfo/Application.php

@@ -21,9 +21,11 @@
 
 namespace OCA\User_SAML\AppInfo;
 
+use OCA\User_SAML\DavPlugin;
 use OCA\User_SAML\Middleware\OnlyLoggedInMiddleware;
 use OCP\AppFramework\App;
 use OCP\AppFramework\IAppContainer;
+use OCP\SabrePluginEvent;
 
 class Application extends App {
 	public function __construct(array $urlParams = array()) {
@@ -33,12 +35,32 @@ class Application extends App {
 		/**
 		 * Middleware
 		 */
-		$container->registerService('OnlyLoggedInMiddleware', function(IAppContainer $c){
+		$container->registerService('OnlyLoggedInMiddleware', function (IAppContainer $c) {
 			return new OnlyLoggedInMiddleware(
 				$c->query('ControllerMethodReflector'),
 				$c->query('ServerContainer')->getUserSession()
 			);
 		});
+
+		$container->registerService(DavPlugin::class, function (IAppContainer $c) {
+			$server = $c->getServer();
+			return new DavPlugin(
+				$server->getSession(),
+				$server->getConfig(),
+				$_SERVER
+			);
+		});
+
 		$container->registerMiddleWare('OnlyLoggedInMiddleware');
 	}
+
+	public function registerDavAuth() {
+
+		$container = $this->getContainer();
+
+		$dispatcher = $container->getServer()->getEventDispatcher();
+		$dispatcher->addListener('OCA\DAV\Connector\Sabre::addPlugin', function (SabrePluginEvent $event) use ($container) {
+			$event->getServer()->addPlugin($container->query(DavPlugin::class));
+		});
+	}
 }

lib/DavPlugin.php

@@ -0,0 +1,54 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 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\User_SAML;
+
+use OCP\IConfig;
+use OCP\ISession;
+use Sabre\DAV\Server;
+use Sabre\DAV\ServerPlugin;
+
+class DavPlugin extends ServerPlugin {
+	private $session;
+	private $config;
+	private $auth;
+
+	public function __construct(ISession $session, IConfig $config, array $auth) {
+		$this->session = $session;
+		$this->config = $config;
+		$this->auth = $auth;
+	}
+
+
+	public function initialize(Server $server) {
+		// before auth
+		$server->on('beforeMethod', [$this, 'beforeMethod'], 9);
+	}
+
+	public function beforeMethod() {
+		if (!$this->session->exists('user_saml.samlUserData')) {
+			$uidMapping = $this->config->getAppValue('user_saml', 'general-uid_mapping');
+			if (isset($this->auth[$uidMapping])) {
+				$this->session->set('user_saml.samlUserData', $this->auth);
+			}
+		}
+	}
+}