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.crypto.key.kms;
019
020import org.apache.hadoop.classification.InterfaceAudience;
021import org.apache.hadoop.io.Text;
022import org.apache.hadoop.security.token.delegation.web.DelegationTokenIdentifier;
023
024/**
025 * Holder class for KMS delegation tokens.
026 */
027@InterfaceAudience.Private
028public final class KMSDelegationToken {
029
030  public static final String TOKEN_KIND_STR = "kms-dt";
031  public static final Text TOKEN_KIND = new Text(TOKEN_KIND_STR);
032
033  // Utility class is not supposed to be instantiated.
034  private KMSDelegationToken() {
035  }
036
037  /**
038   * DelegationTokenIdentifier used for the KMS.
039   */
040  public static class KMSDelegationTokenIdentifier
041      extends DelegationTokenIdentifier {
042
043    public KMSDelegationTokenIdentifier() {
044      super(TOKEN_KIND);
045    }
046
047    @Override
048    public Text getKind() {
049      return TOKEN_KIND;
050    }
051  }
052}