diff --git a/lib/private/AppFramework/DependencyInjection/DIContainer.php b/lib/private/AppFramework/DependencyInjection/DIContainer.php
index f1c6b460a9277..2ce883ee2383d 100644
--- a/lib/private/AppFramework/DependencyInjection/DIContainer.php
+++ b/lib/private/AppFramework/DependencyInjection/DIContainer.php
@@ -53,6 +53,7 @@
 use OCP\Files\IAppData;
 use OCP\Files\Mount\IMountManager;
 use OCP\RichObjectStrings\IValidator;
+use OCP\Share\IShareHelper;
 use OCP\Util;
 
 class DIContainer extends SimpleContainer implements IAppContainer {
@@ -363,6 +364,10 @@ public function __construct($appName, $urlParams = array()){
 			);
 		});
 
+		$this->registerService(IShareHelper::class, function (SimpleContainer $c) {
+			return $c->query(IShareHelper::class);
+		});
+
 
 		/**
 		 * App Framework APIs
diff --git a/lib/private/Encryption/File.php b/lib/private/Encryption/File.php
index 329fb12b83938..3b6a87ef516bd 100644
--- a/lib/private/Encryption/File.php
+++ b/lib/private/Encryption/File.php
@@ -101,7 +101,7 @@ public function getAccessList($path) {
 		// Find out who, if anyone, is sharing the file
 		if ($file !== null) {
 			$resultForFile = $this->shareManager->getAccessList($file, false);
-			$userIds = \array_merge($userIds, $resultForFile['users']);
+			$userIds = array_merge($userIds, $resultForFile['users']);
 			$public = $resultForFile['public'] || $resultForFile['remote'] || $public;
 		}
 
diff --git a/lib/private/Server.php b/lib/private/Server.php
index f4ffd88504498..64935f94ff263 100644
--- a/lib/private/Server.php
+++ b/lib/private/Server.php
@@ -89,6 +89,7 @@
 use OC\Security\SecureRandom;
 use OC\Security\TrustedDomainHelper;
 use OC\Session\CryptoWrapper;
+use OC\Share20\ShareHelper;
 use OC\Tagging\TagMapper;
 use OCA\Theming\ThemingDefaults;
 use OCP\Federation\ICloudIdManager;
@@ -97,6 +98,7 @@
 use OCP\IServerContainer;
 use OCP\RichObjectStrings\IValidator;
 use OCP\Security\IContentSecurityPolicyManager;
+use OCP\Share\IShareHelper;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
@@ -845,6 +847,12 @@ public function __construct($webRoot, \OC\Config $config) {
 				new TimeFactory()
 			);
 		});
+
+		$this->registerService(IShareHelper::class, function(Server $c) {
+			return new ShareHelper(
+				$c->getLazyRootFolder()
+			);
+		});
 	}
 
 	/**
diff --git a/lib/public/Share/IManager.php b/lib/public/Share/IManager.php
index 45e0e9d80c25b..26c3f2b42e633 100644
--- a/lib/public/Share/IManager.php
+++ b/lib/public/Share/IManager.php
@@ -216,10 +216,11 @@ public function userDeletedFromGroup($uid, $gid);
 	 *
 	 * @param \OCP\Files\Node $path
 	 * @param bool $recursive Should we check all parent folders as well
+	 * @param bool $currentAccess Should the user have currently access to the file
 	 * @return array
-	 * @since 9.2.0
+	 * @since 12
 	 */
-	public function getAccessList(\OCP\Files\Node $path, $recursive = true);
+	public function getAccessList(\OCP\Files\Node $path, $recursive = true, $currentAccess = false);
 
 	/**
 	 * Instantiates a new share object. This is to be passed to
diff --git a/lib/public/Share/IShareHelper.php b/lib/public/Share/IShareHelper.php
new file mode 100644
index 0000000000000..5e99f86832d60
--- /dev/null
+++ b/lib/public/Share/IShareHelper.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * @copyright 2017, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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 OCP\Share;
+
+use OCP\Files\Node;
+
+/**
+ * Interface IShareHelper
+ *
+ * @package OCP\Share
+ * @since 12
+ */
+interface IShareHelper {
+
+	/**
+	 * If a user has access to a file
+	 *
+	 * @param Node $node
+	 * @param array $users Array of userIds
+	 * @return array Mapping $uid to an array of nodes
+	 * @since 12
+	 */
+	public function getPathsForAccessList(Node $node, $users);
+}