content: /*
   * 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.kafka.common.security.plain;
  
  import javax.security.auth.callback.Callback;
  
  /*
   * Authentication callback for SASL/PLAIN authentication. Callback handler must
   * set authenticated flag to true if the client provided password in the callback
   * matches the expected password.
   */
  public class PlainAuthenticateCallback implements Callback {
      private final char[] password;
      private boolean authenticated;
  
      /**
       * Creates a callback with the password provided by the client
       * @param password The password provided by the client during SASL/PLAIN authentication
       */
      public PlainAuthenticateCallback(char[] password) {
          this.password = password;
      }
  
      /**
       * Returns the password provided by the client during SASL/PLAIN authentication
       */
      public char[] password() {
          return password;
      }
  
      /**
       * Returns true if client password matches expected password, false otherwise.
       * This state is set the server-side callback handler.
       */
      public boolean authenticated() {
          return this.authenticated;
      }
  
      /**
       * Sets the authenticated state. This is set by the server-side callback handler
       * by matching the client provided password with the expected password.
       *
       * @param authenticated true indicates successful authentication
       */
      public void authenticated(boolean authenticated) {
          this.authenticated = authenticated;
      }
  }
  