1 files changed, 48 insertions, 12 deletions

diff --git a/apps/user_ldap/user_ldap.php b/apps/user_ldap/user_ldap.php
index a2f4b4ee9e5..00cba718369 100644
--- a/apps/user_ldap/user_ldap.php
+++ b/apps/user_ldap/user_ldap.php
@@ -71,6 +71,43 @@ class USER_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
 	}
 
 	/**
+	 * returns the username for the given login name, if available
+	 *
+	 * @param string $loginName
+	 * @return string|false
+	 */
+	public function loginName2UserName($loginName) {
+		try {
+			$ldapRecord = $this->getLDAPUserByLoginName($loginName);
+			$user = $this->access->userManager->get($ldapRecord['dn']);
+			if($user instanceof OfflineUser) {
+				return false;
+			}
+			return $user->getUsername();
+		} catch (\Exception $e) {
+			return false;
+		}
+	}
+
+	/**
+	 * returns an LDAP record based on a given login name
+	 *
+	 * @param string $loginName
+	 * @return array
+	 * @throws \Exception
+	 */
+	public function getLDAPUserByLoginName($loginName) {
+		//find out dn of the user name
+		$attrs = array($this->access->connection->ldapUserDisplayName, 'dn',
+			'uid', 'samaccountname');
+		$users = $this->access->fetchUsersByLoginName($loginName, $attrs);
+		if(count($users) < 1) {
+			throw new \Exception('No user available for the given login name.');
+		}
+		return $users[0];
+	}
+
+	/**
 	 * Check if the password is correct
 	 * @param string $uid The username
 	 * @param string $password The password
@@ -79,15 +116,14 @@ class USER_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
 	 * Check if the password is correct without logging in the user
 	 */
 	public function checkPassword($uid, $password) {
-		//find out dn of the user name
-		$attrs = array($this->access->connection->ldapUserDisplayName, 'dn',
-			'uid', 'samaccountname');
-		$users = $this->access->fetchUsersByLoginName($uid, $attrs);
-		if(count($users) < 1) {
+		try {
+			$ldapRecord = $this->getLDAPUserByLoginName($uid);
+		} catch(\Exception $e) {
 			return false;
 		}
-		$dn = $users[0]['dn'];
+		$dn = $ldapRecord['dn'];
 		$user = $this->access->userManager->get($dn);
+
 		if(!$user instanceof User) {
 			\OCP\Util::writeLog('user_ldap',
 				'LDAP Login: Could not get user object for DN ' . $dn .
@@ -102,14 +138,14 @@ class USER_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
 			}
 
 			$user->markLogin();
-			if(isset($users[0][$this->access->connection->ldapUserDisplayName])) {
-				$dpn = $users[0][$this->access->connection->ldapUserDisplayName];
+			if(isset($ldapRecord[$this->access->connection->ldapUserDisplayName])) {
+				$dpn = $ldapRecord[$this->access->connection->ldapUserDisplayName];
 				$user->storeDisplayName($dpn);
 			}
-			if(isset($users[0]['uid'])) {
-				$user->storeLDAPUserName($users[0]['uid']);
-			} else if(isset($users[0]['samaccountname'])) {
-				$user->storeLDAPUserName($users[0]['samaccountname']);
+			if(isset($ldapRecord['uid'])) {
+				$user->storeLDAPUserName($ldapRecord['uid']);
+			} else if(isset($ldapRecord['samaccountname'])) {
+				$user->storeLDAPUserName($ldapRecord['samaccountname']);
 			}
 
 			return $user->getUsername();