org.apache.sqoop.security.Authentication.KerberosAuthenticationHandler.java Source code

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Here is the source code for org.apache.sqoop.security.Authentication.KerberosAuthenticationHandler.java

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/**
 * 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.sqoop.security.Authentication;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.log4j.Logger;
import org.apache.sqoop.common.MapContext;
import org.apache.sqoop.common.SqoopException;
import org.apache.sqoop.core.SqoopConfiguration;
import org.apache.sqoop.security.AuthenticationHandler;
import org.apache.sqoop.security.SecurityConstants;
import org.apache.sqoop.security.SecurityError;

import java.io.IOException;

public class KerberosAuthenticationHandler extends AuthenticationHandler {

    private static final Logger LOG = Logger.getLogger(KerberosAuthenticationHandler.class);

    /**
     * Principal for Kerberos option value
     */
    private String keytabPrincipal;

    public String getKeytabPrincipal() {
        return keytabPrincipal;
    }

    /**
     * Keytab for Kerberos option value
     */
    private String keytabFile;

    public String getKeytabFile() {
        return keytabFile;
    }

    public void doInitialize() {
        securityEnabled = true;
    }

    public void secureLogin() {
        MapContext mapContext = SqoopConfiguration.getInstance().getContext();
        String keytab = mapContext.getString(SecurityConstants.AUTHENTICATION_KERBEROS_KEYTAB).trim();
        if (keytab.length() == 0) {
            throw new SqoopException(SecurityError.AUTH_0001, SecurityConstants.AUTHENTICATION_KERBEROS_KEYTAB);
        }
        keytabFile = keytab;

        String principal = mapContext.getString(SecurityConstants.AUTHENTICATION_KERBEROS_PRINCIPAL).trim();
        if (principal.length() == 0) {
            throw new SqoopException(SecurityError.AUTH_0002, SecurityConstants.AUTHENTICATION_KERBEROS_PRINCIPAL);
        }
        keytabPrincipal = principal;

        Configuration conf = new Configuration();
        conf.set(get_hadoop_security_authentication(), SecurityConstants.TYPE.KERBEROS.name());
        UserGroupInformation.setConfiguration(conf);
        try {
            String hostPrincipal = SecurityUtil.getServerPrincipal(principal, "0.0.0.0");
            UserGroupInformation.loginUserFromKeytab(hostPrincipal, keytab);
        } catch (IOException ex) {
            throw new SqoopException(SecurityError.AUTH_0003, ex);
        }
        LOG.info("Using Kerberos authentication, principal [" + principal + "] keytab [" + keytab + "]");
    }
}