001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.security.provider;
019
020import java.util.Optional;
021import java.util.function.Supplier;
022
023import javax.security.sasl.SaslServer;
024
025import org.apache.hadoop.hbase.HBaseInterfaceAudience;
026import org.apache.hadoop.security.UserGroupInformation;
027import org.apache.yetus.audience.InterfaceAudience;
028import org.apache.yetus.audience.InterfaceStability;
029
030/**
031 * Wrapper around a SaslServer which provides the last user attempting to authenticate via SASL,
032 * if the server/mechanism allow figuring that out.
033 */
034@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.AUTHENTICATION)
035@InterfaceStability.Evolving
036public class AttemptingUserProvidingSaslServer {
037  private final Supplier<UserGroupInformation> producer;
038  private final SaslServer saslServer;
039
040  public AttemptingUserProvidingSaslServer(
041      SaslServer saslServer, Supplier<UserGroupInformation> producer) {
042    this.saslServer = saslServer;
043    this.producer = producer;
044  }
045
046  public SaslServer getServer() {
047    return saslServer;
048  }
049
050  public Optional<UserGroupInformation> getAttemptingUser() {
051    return Optional.ofNullable(producer.get());
052  }
053}