From a216ec902a311aa5b9853129efad2e90034823a1 Mon Sep 17 00:00:00 2001
From: Michael Jumper <mjumper@apache.org>
Date: Thu, 21 Oct 2021 16:34:39 -0700
Subject: [PATCH] GUACAMOLE-957: Match any user for LDAP YAML by default.

---
 .../guacamole/auth/ldap/conf/JacksonLDAPConfiguration.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/conf/JacksonLDAPConfiguration.java b/extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/conf/JacksonLDAPConfiguration.java
index e3e1496ed..1d00c6b40 100644
--- a/extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/conf/JacksonLDAPConfiguration.java
+++ b/extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/conf/JacksonLDAPConfiguration.java
@@ -276,6 +276,10 @@ public class JacksonLDAPConfiguration implements LDAPConfiguration {
     @Override
     public String appliesTo(String username) throws GuacamoleException {
 
+        // Match any user by default
+        if (matchUsernames == null || matchUsernames.isEmpty())
+            return username;
+        
         for (Pattern pattern : matchUsernames) {
             Matcher matcher = pattern.matcher(username);
             if (matcher.matches())