org.jdiameter.client.impl.transport.tls.netty.StartTlsClientHandler.java Source code

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Here is the source code for org.jdiameter.client.impl.transport.tls.netty.StartTlsClientHandler.java

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/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2016, TeleStax Inc. and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

package org.jdiameter.client.impl.transport.tls.netty;

import javax.net.ssl.SSLEngine;

import org.jdiameter.client.impl.transport.tls.netty.TLSTransportClient.TlsHandshakingState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslHandler;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;

/**
 *
 * @author <a href="mailto:jqayyum@gmail.com"> Jehanzeb Qayyum </a>
 */
public class StartTlsClientHandler extends ChannelInboundHandlerAdapter {
    private static final Logger logger = LoggerFactory.getLogger(StartTlsClientHandler.class);

    private final TLSTransportClient tlsTransportClient;

    public StartTlsClientHandler(TLSTransportClient tlsTransportClient) {
        this.tlsTransportClient = tlsTransportClient;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception {
        logger.debug("StartTlsClientHandler");
        ByteBuf buf = (ByteBuf) msg;
        byte[] bytes = new byte[buf.readableBytes()];
        buf.getBytes(buf.readerIndex(), bytes);

        if ("StartTlsResponse".equals(new String(bytes))) {
            logger.debug("received StartTlsResponse");

            SslContext sslContext = SslContextFactory.getSslContextForClient(this.tlsTransportClient.getConfig());
            SSLEngine sslEngine = sslContext.newEngine(ctx.alloc());
            sslEngine.setUseClientMode(true);
            SslHandler sslHandler = new SslHandler(sslEngine, false);

            final ChannelPipeline pipeline = ctx.pipeline();
            pipeline.remove("startTlsClientHandler");
            pipeline.addLast("sslHandler", sslHandler);

            logger.debug("StartTls starting handshake");

            sslHandler.handshakeFuture().addListener(new GenericFutureListener() {
                @Override
                public void operationComplete(Future future) throws Exception {
                    if (future.isSuccess()) {
                        logger.debug("StartTls handshake succesfull");

                        tlsTransportClient.setTlsHandshakingState(TlsHandshakingState.SHAKEN);

                        logger.debug("restoring all handlers");

                        pipeline.addLast("decoder",
                                new DiameterMessageDecoder(
                                        StartTlsClientHandler.this.tlsTransportClient.getParent(),
                                        StartTlsClientHandler.this.tlsTransportClient.getParser()));
                        pipeline.addLast("msgHandler", new DiameterMessageHandler(
                                StartTlsClientHandler.this.tlsTransportClient.getParent(), true));

                        pipeline.addLast("encoder", new DiameterMessageEncoder(
                                StartTlsClientHandler.this.tlsTransportClient.getParser()));
                        pipeline.addLast("inbandWriter", new InbandSecurityHandler());
                    }
                }
            });

        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        logger.error(cause.getMessage(), cause);
    }

}