/*
 * 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 javaobject;

import java.security.Principal;
import java.util.Properties;

import org.apache.geode.LogWriter;
import org.apache.geode.distributed.DistributedMember;
import org.apache.geode.security.AuthenticationFailedException;
import org.apache.geode.security.Authenticator;
import javaobject.UserPasswordAuthInit;
import javaobject.UsernamePrincipal;

/**
 * A dummy implementation of the {@link Authenticator} interface that expects a
 * user name and password allowing authentication depending on the format of the
 * user name.
 * 
 */
public class SimpleAuthenticator implements Authenticator {

  public static Authenticator create() {
    return new SimpleAuthenticator();
  }

  public SimpleAuthenticator() {
  }

  public void init(Properties systemProps, LogWriter systemLogger,
      LogWriter securityLogger) throws AuthenticationFailedException {
  }

  public static boolean testValidName(String userName) {

    return (userName.startsWith("user") || userName.startsWith("reader")
        || userName.startsWith("writer") || userName.equals("admin")
        || userName.equals("root") || userName.equals("administrator"));
  }

  public Principal authenticate(Properties props, DistributedMember member)
      throws AuthenticationFailedException {

    String userName = props.getProperty(UserPasswordAuthInit.USER_NAME);
    if (userName == null) {
      throw new AuthenticationFailedException(
          "SimpleAuthenticator: user name property ["
              + UserPasswordAuthInit.USER_NAME + "] not provided");
    }
    String password = props.getProperty(UserPasswordAuthInit.PASSWORD);
    if (password == null) {
      throw new AuthenticationFailedException(
          "SimpleAuthenticator: password property ["
              + UserPasswordAuthInit.PASSWORD + "] not provided");
    }

    if (userName.equals(password) && testValidName(userName)) {
      return new UsernamePrincipal(userName);
    }
    else {
      throw new AuthenticationFailedException(
          "SimpleAuthenticator: Invalid user name [" + userName
              + "], password supplied.");
    }
  }

  public void close() {
  }

}