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java/org/apache/catalina/realm/NullRealm.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.catalina.realm;
+
+import java.security.Principal;
+
+/**
+ * Minimal Realm implementation that always returns null when an attempt is made
+ * to validate a user name and password. It is intended to be used as a default
+ * Realm implementation when no other Realm is specified.
+ */
+public class NullRealm extends RealmBase {
+
+    private static final String NAME = "NullRealm";
+
+    @Override
+    @Deprecated
+    protected String getName() {
+        return NAME;
+    }
+
+    @Override
+    protected String getPassword(String username) {
+        // Always return null
+        return null;
+    }
+
+    @Override
+    protected Principal getPrincipal(String username) {
+        // Always return null
+        return null;
+    }
+}