org.apache.hadoop.hive.ql.security.ProxyUserAuthenticator Maven / Gradle / Ivy
/**
* 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.hive.ql.security;
import java.util.Arrays;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.security.UserGroupInformation;
/**
* ProxyUserAuthenticator extends HadoopDefaultAuthenticator
* but honours a proxy config setting proxy.user.name instead of the
* current user if set. This allows server processes like webhcat which
* proxy other users to easily specify an override if allowed.
*
* It is no longer necessary to use this class with WebHCat as of Hive 0.14.
*/
public class ProxyUserAuthenticator extends HadoopDefaultAuthenticator {
private static final String PROXY_USER_NAME = "proxy.user.name";
@Override
public void setConf(Configuration conf) {
this.conf = conf;
UserGroupInformation ugi = null;
String proxyUser = conf.get(PROXY_USER_NAME);
if (proxyUser == null){
super.setConf(conf);
return;
}
// If we're here, proxy user is set.
try {
ugi = UserGroupInformation.createRemoteUser(proxyUser);
} catch (Exception e) {
throw new RuntimeException(e);
}
if (ugi == null) {
throw new RuntimeException(
"Can not initialize ProxyUserAuthenticator for user ["+proxyUser+"]");
}
this.userName = ugi.getShortUserName();
if (ugi.getGroupNames() != null) {
this.groupNames = Arrays.asList(ugi.getGroupNames());
}
}
}