don't read certificates if ownCloud is not installed

lib/private/security/certificatemanager.php

@@ -27,6 +27,7 @@ namespace OC\Security;
 
 use OC\Files\Filesystem;
 use OCP\ICertificateManager;
+use OCP\IConfig;
 
 /**
  * Manage trusted certificates for users
@@ -42,13 +43,20 @@ class CertificateManager implements ICertificateManager {
 	 */
 	protected $view;
 
+	/**
+	 * @var IConfig
+	 */
+	protected $config;
+
 	/**
 	 * @param string $uid
 	 * @param \OC\Files\View $view relative zu data/
+	 * @param IConfig $config
 	 */
-	public function __construct($uid, \OC\Files\View $view) {
+	public function __construct($uid, \OC\Files\View $view, IConfig $config) {
 		$this->uid = $uid;
 		$this->view = $view;
+		$this->config = $config;
 	}
 
 	/**
@@ -57,6 +65,11 @@ class CertificateManager implements ICertificateManager {
 	 * @return \OCP\ICertificate[]
 	 */
 	public function listCertificates() {
+
+		if (!$this->config->getSystemValue('installed', false)) {
+			return array();
+		}
+
 		$path = $this->getPathToCertificates() . 'uploads/';
 		if (!$this->view->is_dir($path)) {
 			return array();

lib/private/server.php

@@ -339,7 +339,7 @@ class Server extends SimpleContainer implements IServerContainer {
 			$uid = $user ? $user : null;
 			return new ClientService(
 				$c->getConfig(),
-				new \OC\Security\CertificateManager($uid, new View())
+				new \OC\Security\CertificateManager($uid, new View(), $c->getConfig())
 			);
 		});
 		$this->registerService('EventLogger', function (Server $c) {
@@ -852,7 +852,7 @@ class Server extends SimpleContainer implements IServerContainer {
 			}
 			$userId = $user->getUID();
 		}
-		return new CertificateManager($userId, new View());
+		return new CertificateManager($userId, new View(), $this->getConfig());
 	}
 
 	/**

lib/private/util.php

@@ -1145,6 +1145,7 @@ class OC_Util {
 	 * @throws \OC\HintException If the test file can't get written.
 	 */
 	public function isHtaccessWorking(\OCP\IConfig $config) {
+
 		if (\OC::$CLI || !$config->getSystemValue('check_for_working_htaccess', true)) {
 			return true;
 		}

tests/lib/security/certificatemanager.php

@@ -26,7 +26,11 @@ class CertificateManagerTest extends \Test\TestCase {
 		\OC\Files\Filesystem::tearDown();
 		\OC_Util::setupFS($this->username);
 
-		$this->certificateManager = new CertificateManager($this->username, new \OC\Files\View());
+		$config = $this->getMock('OCP\IConfig');
+		$config->expects($this->any())->method('getSystemValue')
+			->with('installed', false)->willReturn(true);
+
+		$this->certificateManager = new CertificateManager($this->username, new \OC\Files\View(), $config);
 	}
 
 	protected function tearDown() {