/**
    * 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.hadoop.hbase.security.token;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.client.Connection;
  import org.apache.hadoop.hbase.client.ConnectionFactory;
  import org.apache.hadoop.hbase.client.Table;
  import org.apache.hadoop.hbase.ipc.AsyncRpcClient;
  import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
  import org.apache.hadoop.hbase.ipc.RpcClient;
  import org.apache.hadoop.hbase.ipc.RpcClientFactory;
  import org.apache.hadoop.hbase.ipc.RpcClientImpl;
  import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
  import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos;
  import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos.GetAuthenticationTokenRequest;
  import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos.WhoAmIRequest;
  import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos.WhoAmIResponse;
  import org.apache.hadoop.hbase.security.AccessDeniedException;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.testclassification.SecurityTests;
  import org.apache.hadoop.security.UserGroupInformation;
  import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
  import org.apache.hadoop.security.token.Token;
  import org.apache.hadoop.security.token.TokenIdentifier;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import com.google.protobuf.ServiceException;
  
  @Category({ SecurityTests.class, MediumTests.class })
  public class TestGenerateDelegationToken extends SecureTestCluster {
  
    private void testTokenAuth(Class<? extends RpcClient> rpcImplClass) throws IOException,
        ServiceException {
      TEST_UTIL.getConfiguration().set(RpcClientFactory.CUSTOM_RPC_CLIENT_IMPL_CONF_KEY,
        rpcImplClass.getName());
      try (Connection conn = ConnectionFactory.createConnection(TEST_UTIL.getConfiguration());
          Table table = conn.getTable(TableName.META_TABLE_NAME)) {
        CoprocessorRpcChannel rpcChannel = table.coprocessorService(HConstants.EMPTY_START_ROW);
        AuthenticationProtos.AuthenticationService.BlockingInterface service =
            AuthenticationProtos.AuthenticationService.newBlockingStub(rpcChannel);
        WhoAmIResponse response = service.whoAmI(null, WhoAmIRequest.getDefaultInstance());
        assertEquals(USERNAME, response.getUsername());
        assertEquals(AuthenticationMethod.TOKEN.name(), response.getAuthMethod());
        try {
          service.getAuthenticationToken(null, GetAuthenticationTokenRequest.getDefaultInstance());
        } catch (ServiceException e) {
          AccessDeniedException exc = (AccessDeniedException) ProtobufUtil.getRemoteException(e);
          assertTrue(exc.getMessage().contains(
            "Token generation only allowed for Kerberos authenticated clients"));
        }
      }
    }
  
    @Test
    public void test() throws Exception {
      try (Connection conn = ConnectionFactory.createConnection(TEST_UTIL.getConfiguration())) {
        Token<? extends TokenIdentifier> token = TokenUtil.obtainToken(conn);
        UserGroupInformation.getCurrentUser().addToken(token);
        testTokenAuth(RpcClientImpl.class);
        testTokenAuth(AsyncRpcClient.class);
      }
    }
  }