package com.thinkbiganalytics.kerberos;
/*-
* #%L
* thinkbig-kerberos-core
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* Licensed 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.
* #L%
*/
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.security.UserGroupInformation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
*/
@Service
public class KerberosTicketGenerator {
private static final Logger log = LoggerFactory.getLogger(KerberosTicketGenerator.class);
public UserGroupInformation generateKerberosTicket(KerberosTicketConfiguration kerberosTicketConfiguration) throws IOException {
Configuration config = new Configuration();
String[] resources = kerberosTicketConfiguration.getHadoopConfigurationResources().split(",");
for (String resource : resources) {
config.addResource(new Path(resource));
}
config.set("hadoop.security.authentication", "Kerberos");
UserGroupInformation.setConfiguration(config);
log.debug("Generating Kerberos ticket for principal: " + kerberosTicketConfiguration.getKerberosPrincipal() + " at key tab location: " + kerberosTicketConfiguration.getKeytabLocation());
return UserGroupInformation.loginUserFromKeytabAndReturnUGI(kerberosTicketConfiguration.getKerberosPrincipal(), kerberosTicketConfiguration.getKeytabLocation());
}
}