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.security.UserGroupInformation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.PrivilegedExceptionAction;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
/**
*/
public class KerberosUtil {
private static final Logger log = LoggerFactory.getLogger(KerberosUtil.class);
public static Connection getConnectionWithOrWithoutKerberos(final DataSource dataSource, KerberosTicketConfiguration kerberosTicketConfiguration) throws SQLException {
Connection connection = null;
if (kerberosTicketConfiguration.isKerberosEnabled()) {
log.info("Initializing Kerberos ticket for Hive connection");
UserGroupInformation userGroupInformation;
try {
KerberosTicketGenerator t = new KerberosTicketGenerator();
userGroupInformation = t.generateKerberosTicket(kerberosTicketConfiguration);
connection = userGroupInformation.doAs(new PrivilegedExceptionAction<Connection>() {
@Override
public Connection run() throws Exception {
return dataSource.getConnection();
}
});
} catch (Exception e) {
log.error("Error in Kerberos authentication", e);
throw new RuntimeException(e);
}
} else {
connection = dataSource.getConnection();
}
return connection;
}
}