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 org.apache.hadoop.hbase.HBaseInterfaceAudience;
021import org.apache.yetus.audience.InterfaceAudience;
022import org.apache.yetus.audience.InterfaceStability;
023
024/**
025 * Encapsulation of client-side logic to authenticate to HBase via some means over SASL. It is
026 * suggested that custom implementations extend the abstract class in the type hierarchy instead of
027 * directly implementing this interface (clients have a base class available, but servers presently
028 * do not). Implementations of this interface <b>must</b> be unique among each other via the
029 * {@code byte} returned by {@link SaslAuthMethod#getCode()} on {@link #getSaslAuthMethod()}.
030 */
031@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.AUTHENTICATION)
032@InterfaceStability.Evolving
033public interface SaslAuthenticationProvider {
034
035  /**
036   * Returns the attributes which identify how this provider authenticates.
037   */
038  SaslAuthMethod getSaslAuthMethod();
039
040  /**
041   * Returns the name of the type used by the TokenIdentifier.
042   */
043  String getTokenKind();
044}