From c0ee3cdcc5f7d610a08415feaa6572c729c64b62 Mon Sep 17 00:00:00 2001
From: Arthur Schiwon <blizzz@arthur-schiwon.de>
Date: Thu, 15 Mar 2018 15:47:44 +0100
Subject: [PATCH] existence check works without attribute (like with users)

cn is not necessarily given everywhere

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>
---
 apps/user_ldap/lib/Access.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/apps/user_ldap/lib/Access.php b/apps/user_ldap/lib/Access.php
index a805c63ffc..1d44ec0362 100644
--- a/apps/user_ldap/lib/Access.php
+++ b/apps/user_ldap/lib/Access.php
@@ -460,6 +460,7 @@ class Access extends LDAPUtility implements IUserTools {
 	 *
 	 * @param string[] $groupDNs
 	 * @return string[]
+	 * @throws ServerNotAvailableException
 	 */
 	public function groupsMatchFilter($groupDNs) {
 		$validGroupDNs = [];
@@ -480,7 +481,7 @@ class Access extends LDAPUtility implements IUserTools {
 				continue;
 			}
 
-			$result = $this->readAttribute($dn, 'cn', $this->connection->ldapGroupFilter);
+			$result = $this->readAttribute($dn, '', $this->connection->ldapGroupFilter);
 			if(is_array($result)) {
 				$this->connection->writeToCache($cacheKey, true);
 				$validGroupDNs[] = $dn;