Examples of io.netty.handler.ssl.SslHandler

io.netty.handler.ssl.SslHandler
kipedia.org/wiki/Transport_Layer_Security">SSL · TLS and StartTLS support to a {@link Channel}. Please refer to the "SecureChat" example in the distribution or the web site for the detailed usage.
Beginning the handshake

You must make sure not to write a message while the {@linkplain #handshake() handshake} is in progress unless you arerenegotiating. You will be notified by the {@link ChannelFuture} which isreturned by the {@link #handshake()} method when the handshakeprocess succeeds or fails.
Handshake

If {@link #isIssueHandshake()} is {@code false}(default) you will need to take care of calling {@link #handshake()} by your own. In most situations were {@link SslHandler} is used in 'client mode'you want to issue a handshake once the connection was established. if {@link #setIssueHandshake(boolean)} is set to true you don't need to worry about this as the {@link SslHandler} will take care of it.

Renegotiation

If {@link #isEnableRenegotiation() enableRenegotiation} is {@code true}(default) and the initial handshake has been done successfully, you can call {@link #handshake()} to trigger the renegotiation.
If {@link #isEnableRenegotiation() enableRenegotiation} is {@code false}, an attempt to trigger renegotiation will result in the connection closure.
Please note that TLS renegotiation had a security issue before. If your runtime environment did not fix it, please make sure to disable TLS renegotiation by calling {@link #setEnableRenegotiation(boolean)} with{@code false}. For more information, please refer to the following documents:
Closing the session

To close the SSL session, the {@link #close()} method should becalled to send the {@code close_notify} message to the remote peer. Oneexception is when you close the {@link Channel} - {@link SslHandler}intercepts the close request and send the {@code close_notify} messagebefore the channel closure automatically. Once the SSL session is closed, it is not reusable, and consequently you should create a new {@link SslHandler} with a new {@link SSLEngine} as explained in thefollowing section.
Restarting the session

To restart the SSL session, you must remove the existing closed {@link SslHandler} from the {@link ChannelPipeline}, insert a new {@link SslHandler} with a new {@link SSLEngine} into the pipeline,and start the handshake process as described in the first section.
Implementing StartTLS

StartTLS is the communication pattern that secures the wire in the middle of the plaintext connection. Please note that it is different from SSL · TLS, that secures the wire from the beginning of the connection. Typically, StartTLS is composed of three steps:
1. Client sends a StartTLS request to server.
2. Server sends a StartTLS response to client.
3. Client begins SSL handshake.
If you implement a server, you need to:
1. create a new {@link SslHandler} instance with {@code startTls} flag setto {@code true},
2. insert the {@link SslHandler} to the {@link ChannelPipeline}, and
3. write a StartTLS response.
Please note that you must insert {@link SslHandler} before sendingthe StartTLS response. Otherwise the client can send begin SSL handshake before {@link SslHandler} is inserted to the {@link ChannelPipeline}, causing data corruption.
The client-side implementation is much simpler.
1. Write a StartTLS request,
2. wait for the StartTLS response,
3. create a new {@link SslHandler} instance with {@code startTls} flag setto {@code false},
4. insert the {@link SslHandler} to the {@link ChannelPipeline}, and
5. Initiate SSL handshake by calling {@link SslHandler#handshake()}.
@apiviz.landmark @apiviz.uses io.netty.handler.ssl.SslBufferPool

            return consumer.getConfiguration().getSslHandler();
        } else if (sslContext != null) {
            SSLEngine engine = sslContext.createSSLEngine();
            engine.setUseClientMode(false);
            engine.setNeedClientAuth(consumer.getConfiguration().isNeedClientAuth());
            return new SslHandler(engine);
        }


        return null;
    }

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    protected void initChannel(Channel ch) throws Exception {
        // create a new pipeline
        ChannelPipeline channelPipeline = ch.pipeline();


        SslHandler sslHandler = configureClientSSLOnDemand();
        if (sslHandler != null) {
            //TODO  must close on SSL exception
            //sslHandler.setCloseOnSSLException(true);
            LOG.debug("Client SSL handler configured and added to the ChannelPipeline: {}", sslHandler);
            addToPipeline("ssl", channelPipeline, sslHandler);

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        if (producer.getConfiguration().getSslHandler() != null) {
            return producer.getConfiguration().getSslHandler();
        } else if (sslContext != null) {
            SSLEngine engine = sslContext.createSSLEngine();
            engine.setUseClientMode(true);
            return new SslHandler(engine);
        }


        return null;
    }

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        ObjectHelper.notNull(configuration, "configuration");
        return "netty4:" + getConfiguration().getProtocol() + "://" + getConfiguration().getHost() + ":" + getConfiguration().getPort();
    }
    
    protected SSLSession getSSLSession(ChannelHandlerContext ctx) {
        final SslHandler sslHandler = ctx.pipeline().get(SslHandler.class);
        SSLSession sslSession = null;
        if (sslHandler != null) {
            sslSession = sslHandler.engine().getSession();
        } 
        return sslSession;
    }

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      final ChannelFuture channelFuture = bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
              .childHandler(new ChannelInitializer() {
                @Override
                protected void initChannel(Channel ch) throws Exception {
                  if (useSecureWebSocket) {
                    final SslHandler sslHandler = SslHandlerFactory.buildSslHandler(esc);
                    ch.pipeline().addLast("ssl", sslHandler);
                  }
                  ch.pipeline().addLast("codec-http", new HttpServerCodec());
                  ch.pipeline().addLast("aggregator", new HttpObjectAggregator(65536));
                  ch.pipeline().addLast("handler", webSocketHandler);

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        keyPassword = keyStorePassword;
      }


      keyStore = KeystoreFactory.getKeyStore(keyStorePath, keyStorePassword, keystoreType);
    }
    return new SslHandler(getSslEngine(keyStore, keyPassword));
  }

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        this.sslEngineFactory = sslEngineFactory;
    }


    @Override
    public void configureNewPipeline(ChannelPipeline pipeline) {
        pipeline.addFirst(new SslHandler(sslEngineFactory.createSSLEngine(pipeline.channel().alloc())));
    }

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                        if (null == lifecycleHandler) {
                            onNewConnection(newConnection, subscriber);
                        } else {
                            @SuppressWarnings("unchecked")
                            ConnectionLifecycleHandler<I, O> handler = (ConnectionLifecycleHandler<I, O>) lifecycleHandler;
                            SslHandler sslHandler = pipeline.get(SslHandler.class);
                            if (null == sslHandler) {
                                handler.setConnection(newConnection);
                                onNewConnection(newConnection, subscriber);
                            } else {
                                sslHandler.handshakeFuture().addListener(new GenericFutureListener<Future<? super Channel>>() {
                                    @Override
                                    public void operationComplete(Future<? super Channel> future) throws Exception {
                                        onNewConnection(newConnection, subscriber);
                                    }
                                });

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          // Attach the actual handler


          SSLEngine sslEngine = SSLEngineFactory.create(sslMode, context);


          final SslHandler sslHandler = new SslHandler(sslEngine);


          channel.pipeline().addFirst("ssl", sslHandler);


          try {


            sslHandler.handshakeFuture().syncUninterruptibly();


          }
          catch (Exception e) {


            // Retry with no SSL
            if (sslMode == SSLMode.Prefer) {
              return connect(SSLMode.Disable, address, context);
            }


            throw e;
          }


        }
        else if (sslMode.isRequired()) {


          throw new IOException("SSL not allowed by server");
        }


      }


      try {


        startup(protocol, context);


        if (sslMode == SSLMode.VerifyFull) {


          SslHandler sslHandler = channel.pipeline().get(SslHandler.class);
          if (sslHandler != null) {


            String hostname;
            if (address instanceof InetSocketAddress) {
              hostname = ((InetSocketAddress) address).getHostString();
            }
            else {
              hostname = "";
            }


            verifyHostname(hostname, sslHandler.engine().getSession());
          }


        }


      }

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        SSLEngine engine =
            SecureChatSslContextFactory.getServerContext().createSSLEngine();
        engine.setUseClientMode(false);


        p.addLast("ssl", new SslHandler(engine));
        p.addLast("unificationA", new PortUnificationServerHandler(false, detectGzip));
        p.removeAndForward(this);
    }

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Examples of io.netty.handler.ssl.SslHandler

Beginning the handshake

Handshake

Renegotiation

Closing the session

Restarting the session

Implementing StartTLS

Related Classes of io.netty.handler.ssl.SslHandler