org.apache.drill.exec.rpc.security.plain.PlainFactory.java Source code

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Here is the source code for org.apache.drill.exec.rpc.security.plain.PlainFactory.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.drill.exec.rpc.security.plain;

import org.apache.drill.common.config.DrillProperties;
import org.apache.drill.exec.rpc.security.AuthenticatorFactory;
import org.apache.drill.exec.rpc.security.FastSaslClientFactory;
import org.apache.drill.exec.rpc.user.security.UserAuthenticator;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import java.io.IOException;
import java.util.Map;

public class PlainFactory implements AuthenticatorFactory {
    private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PlainFactory.class);

    public static final String SIMPLE_NAME = PlainServer.MECHANISM_NAME;

    private final UserAuthenticator authenticator;

    public PlainFactory() {
        this.authenticator = null;
    }

    public PlainFactory(final UserAuthenticator authenticator) {
        this.authenticator = authenticator;
    }

    @Override
    public String getSimpleName() {
        return SIMPLE_NAME;
    }

    @Override
    public UserGroupInformation createAndLoginUser(Map<String, ?> properties) throws IOException {
        final Configuration conf = new Configuration();
        UserGroupInformation.setConfiguration(conf);
        try {
            return UserGroupInformation.getCurrentUser();
        } catch (final IOException e) {
            logger.debug("Login failed.", e);
            final Throwable cause = e.getCause();
            if (cause instanceof LoginException) {
                throw new SaslException("Failed to login.", cause);
            }
            throw new SaslException("Unexpected failure trying to login. ", cause);
        }
    }

    @Override
    public SaslServer createSaslServer(final UserGroupInformation ugi, final Map<String, ?> properties)
            throws SaslException {
        return new PlainServer(authenticator, properties);
    }

    @Override
    public SaslClient createSaslClient(final UserGroupInformation ugi, final Map<String, ?> properties)
            throws SaslException {
        final String userName = (String) properties.get(DrillProperties.USER);
        final String password = (String) properties.get(DrillProperties.PASSWORD);

        return FastSaslClientFactory.getInstance().createSaslClient(new String[] { SIMPLE_NAME },
                null /** authorization ID */
                , null, null, properties, new CallbackHandler() {
                    @Override
                    public void handle(final Callback[] callbacks)
                            throws IOException, UnsupportedCallbackException {
                        for (final Callback callback : callbacks) {
                            if (callback instanceof NameCallback) {
                                NameCallback.class.cast(callback).setName(userName);
                                continue;
                            }
                            if (callback instanceof PasswordCallback) {
                                PasswordCallback.class.cast(callback).setPassword(password.toCharArray());
                                continue;
                            }
                            throw new UnsupportedCallbackException(callback);
                        }
                    }
                });
    }

    @Override
    public void close() throws IOException {
        if (authenticator != null) {
            authenticator.close();
        }
    }

    // used for clients < 1.10
    public UserAuthenticator getAuthenticator() {
        return authenticator;
    }
}