| /** |
| * 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.security; |
| |
| import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTH_TO_LOCAL; |
| import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.authentication.util.KerberosName; |
| import org.apache.hadoop.security.authentication.util.KerberosUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class implements parsing and handling of Kerberos principal names. In |
| * particular, it splits them apart and translates them down into local |
| * operating system names. |
| */ |
| @SuppressWarnings("all") |
| @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"}) |
| @InterfaceStability.Evolving |
| public class HadoopKerberosName extends KerberosName { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(HadoopKerberosName.class); |
| |
| /** |
| * Create a name from the full Kerberos principal name. |
| * @param name |
| */ |
| public HadoopKerberosName(String name) { |
| super(name); |
| } |
| /** |
| * Set the static configuration to get and evaluate the rules. |
| * <p> |
| * IMPORTANT: This method does a NOP if the rules have been set already. |
| * If there is a need to reset the rules, the {@link KerberosName#setRules(String)} |
| * method should be invoked directly. |
| * |
| * @param conf the new configuration |
| * @throws IOException |
| */ |
| public static void setConfiguration(Configuration conf) throws IOException { |
| final String defaultRule; |
| switch (SecurityUtil.getAuthenticationMethod(conf)) { |
| case KERBEROS: |
| case KERBEROS_SSL: |
| try { |
| KerberosUtil.getDefaultRealm(); |
| } catch (Exception ke) { |
| throw new IllegalArgumentException("Can't get Kerberos realm", ke); |
| } |
| defaultRule = "DEFAULT"; |
| break; |
| default: |
| // just extract the simple user name |
| defaultRule = "RULE:[1:$1] RULE:[2:$1]"; |
| break; |
| } |
| String ruleString = conf.get(HADOOP_SECURITY_AUTH_TO_LOCAL, defaultRule); |
| setRules(ruleString); |
| |
| String ruleMechanism = conf.get(HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM, DEFAULT_MECHANISM); |
| setRuleMechanism(ruleMechanism); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| setConfiguration(new Configuration()); |
| for(String arg: args) { |
| HadoopKerberosName name = new HadoopKerberosName(arg); |
| System.out.println("Name: " + name + " to " + name.getShortName()); |
| } |
| } |
| } |