| /** |
| * 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.hdfs.security.token.delegation; |
| |
| import java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.security.SecurityUtil; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.token.Token; |
| import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSelector; |
| |
| /** |
| * A delegation token that is specialized for HDFS |
| */ |
| @InterfaceAudience.Private |
| public class DelegationTokenSelector |
| extends AbstractDelegationTokenSelector<DelegationTokenIdentifier>{ |
| public static final String SERVICE_NAME_KEY = "hdfs.service.host_"; |
| |
| private static final DelegationTokenSelector INSTANCE = new DelegationTokenSelector(); |
| |
| /** Select the delegation token for hdfs from the ugi. */ |
| public static Token<DelegationTokenIdentifier> selectHdfsDelegationToken( |
| final InetSocketAddress nnAddr, final UserGroupInformation ugi, |
| final Configuration conf) { |
| // this guesses the remote cluster's rpc service port. |
| // the current token design assumes it's the same as the local cluster's |
| // rpc port unless a config key is set. there should be a way to automatic |
| // and correctly determine the value |
| final String key = SERVICE_NAME_KEY + SecurityUtil.buildTokenService(nnAddr); |
| final String nnServiceName = conf.get(key); |
| |
| int nnRpcPort = NameNode.DEFAULT_PORT; |
| if (nnServiceName != null) { |
| nnRpcPort = NetUtils.createSocketAddr(nnServiceName, nnRpcPort).getPort(); |
| } |
| |
| final Text serviceName = SecurityUtil.buildTokenService( |
| new InetSocketAddress(nnAddr.getHostName(), nnRpcPort)); |
| return INSTANCE.selectToken(serviceName, ugi.getTokens()); |
| } |
| |
| public DelegationTokenSelector() { |
| super(DelegationTokenIdentifier.HDFS_DELEGATION_KIND); |
| } |
| } |