Support for handling SSL and non-SSL in pipeline
Motivation: Some pipelines require support for both SSL and non-SSL messaging. Modifications: Add utility decoder to support both SSL and non-SSL handlers based on the initial message. Result: Less boilerplate code to write for developers.
This commit is contained in:
Johno Crawford
Scott Mitchell
parent
a94b23df7d
commit
cfebaa36c0
|
|
@ -0,0 +1,117 @@
|
|||
/*
|
||||
* Copyright 2017 The Netty Project
|
||||
*
|
||||
* The Netty Project 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 io.netty.handler.ssl;
|
||||
|
||||
import io.netty.buffer.ByteBuf;
|
||||
import io.netty.buffer.ByteBufAllocator;
|
||||
import io.netty.channel.ChannelHandler;
|
||||
import io.netty.channel.ChannelHandlerContext;
|
||||
import io.netty.handler.codec.ByteToMessageDecoder;
|
||||
import io.netty.util.ReferenceCountUtil;
|
||||
import io.netty.util.internal.ObjectUtil;
|
||||
|
||||
import javax.net.ssl.SSLContext;
|
||||
import javax.net.ssl.SSLParameters;
|
||||
import java.util.List;
|
||||
|
||||
/**
|
||||
* {@link OptionalSslHandler} is a utility decoder to support both SSL and non-SSL handlers
|
||||
* based on the first message received.
|
||||
*/
|
||||
public class OptionalSslHandler extends ByteToMessageDecoder {
|
||||
|
||||
private final SslContext sslContext;
|
||||
|
||||
public OptionalSslHandler(SslContext sslContext) {
|
||||
this.sslContext = ObjectUtil.checkNotNull(sslContext, "sslContext");
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void decode(ChannelHandlerContext context, ByteBuf in, List<Object> out) throws Exception {
|
||||
if (in.readableBytes() < SslUtils.SSL_RECORD_HEADER_LENGTH) {
|
||||
return;
|
||||
}
|
||||
if (SslHandler.isEncrypted(in)) {
|
||||
handleSsl(context);
|
||||
} else {
|
||||
handleNonSsl(context);
|
||||
}
|
||||
}
|
||||
|
||||
private void handleSsl(ChannelHandlerContext context) {
|
||||
SslHandler sslHandler = null;
|
||||
try {
|
||||
sslHandler = newSslHandler(context, sslContext);
|
||||
context.pipeline().replace(this, newSslHandlerName(), sslHandler);
|
||||
sslHandler = null;
|
||||
} finally {
|
||||
// Since the SslHandler was not inserted into the pipeline the ownership of the SSLEngine was not
|
||||
// transferred to the SslHandler.
|
||||
if (sslHandler != null) {
|
||||
ReferenceCountUtil.safeRelease(sslHandler.engine());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void handleNonSsl(ChannelHandlerContext context) {
|
||||
ChannelHandler handler = newNonSslHandler(context);
|
||||
if (handler != null) {
|
||||
context.pipeline().replace(this, newNonSslHandlerName(), handler);
|
||||
} else {
|
||||
context.pipeline().remove(this);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Optionally specify the SSL handler name, this method may return {@code null}.
|
||||
* @return the name of the SSL handler.
|
||||
*/
|
||||
protected String newSslHandlerName() {
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Override to configure the SslHandler eg. {@link SSLParameters#setEndpointIdentificationAlgorithm(String)}.
|
||||
* The hostname and port is not known by this method so servers may want to override this method and use the
|
||||
* {@link SslContext#newHandler(ByteBufAllocator, String, int)} variant.
|
||||
*
|
||||
* @param context the {@link ChannelHandlerContext} to use.
|
||||
* @param sslContext the {@link SSLContext} to use.
|
||||
* @return the {@link SslHandler} which will replace the {@link OptionalSslHandler} in the pipeline if the
|
||||
* traffic is SSL.
|
||||
*/
|
||||
protected SslHandler newSslHandler(ChannelHandlerContext context, SslContext sslContext) {
|
||||
return sslContext.newHandler(context.alloc());
|
||||
}
|
||||
|
||||
/**
|
||||
* Optionally specify the non-SSL handler name, this method may return {@code null}.
|
||||
* @return the name of the non-SSL handler.
|
||||
*/
|
||||
protected String newNonSslHandlerName() {
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Override to configure the ChannelHandler.
|
||||
* @param context the {@link ChannelHandlerContext} to use.
|
||||
* @return the {@link ChannelHandler} which will replace the {@link OptionalSslHandler} in the pipeline
|
||||
* or {@code null} to simply remove the {@link OptionalSslHandler} if the traffic is non-SSL.
|
||||
*/
|
||||
protected ChannelHandler newNonSslHandler(ChannelHandlerContext context) {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,121 @@
|
|||
/*
|
||||
* Copyright 2017 The Netty Project
|
||||
*
|
||||
* The Netty Project 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 io.netty.handler.ssl;
|
||||
|
||||
import io.netty.buffer.ByteBuf;
|
||||
import io.netty.buffer.Unpooled;
|
||||
import io.netty.channel.ChannelHandler;
|
||||
import io.netty.channel.ChannelHandlerContext;
|
||||
import io.netty.channel.ChannelPipeline;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
import org.junit.runner.RunWith;
|
||||
import org.mockito.Mock;
|
||||
import org.mockito.Mockito;
|
||||
import org.mockito.junit.MockitoJUnitRunner;
|
||||
|
||||
import static org.mockito.Mockito.*;
|
||||
|
||||
@RunWith(MockitoJUnitRunner.class)
|
||||
public class OptionalSslHandlerTest {
|
||||
|
||||
private static final String SSL_HANDLER_NAME = "sslhandler";
|
||||
private static final String HANDLER_NAME = "handler";
|
||||
|
||||
@Mock
|
||||
private ChannelHandlerContext context;
|
||||
|
||||
@Mock
|
||||
private SslContext sslContext;
|
||||
|
||||
@Mock
|
||||
private ChannelPipeline pipeline;
|
||||
|
||||
@Before
|
||||
public void setUp() throws Exception {
|
||||
when(context.pipeline()).thenReturn(pipeline);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void handlerRemoved() throws Exception {
|
||||
OptionalSslHandler handler = new OptionalSslHandler(sslContext);
|
||||
final ByteBuf payload = Unpooled.copiedBuffer("plaintext".getBytes());
|
||||
try {
|
||||
handler.decode(context, payload, null);
|
||||
verify(pipeline).remove(handler);
|
||||
} finally {
|
||||
payload.release();
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void handlerReplaced() throws Exception {
|
||||
final ChannelHandler nonSslHandler = Mockito.mock(ChannelHandler.class);
|
||||
OptionalSslHandler handler = new OptionalSslHandler(sslContext) {
|
||||
@Override
|
||||
protected ChannelHandler newNonSslHandler(ChannelHandlerContext context) {
|
||||
return nonSslHandler;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String newNonSslHandlerName() {
|
||||
return HANDLER_NAME;
|
||||
}
|
||||
};
|
||||
final ByteBuf payload = Unpooled.copiedBuffer("plaintext".getBytes());
|
||||
try {
|
||||
handler.decode(context, payload, null);
|
||||
verify(pipeline).replace(handler, HANDLER_NAME, nonSslHandler);
|
||||
} finally {
|
||||
payload.release();
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void sslHandlerReplaced() throws Exception {
|
||||
final SslHandler sslHandler = Mockito.mock(SslHandler.class);
|
||||
OptionalSslHandler handler = new OptionalSslHandler(sslContext) {
|
||||
@Override
|
||||
protected SslHandler newSslHandler(ChannelHandlerContext context, SslContext sslContext) {
|
||||
return sslHandler;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String newSslHandlerName() {
|
||||
return SSL_HANDLER_NAME;
|
||||
}
|
||||
};
|
||||
final ByteBuf payload = Unpooled.wrappedBuffer(new byte[] { 22, 3, 1, 0, 5 });
|
||||
try {
|
||||
handler.decode(context, payload, null);
|
||||
verify(pipeline).replace(handler, SSL_HANDLER_NAME, sslHandler);
|
||||
} finally {
|
||||
payload.release();
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void decodeBuffered() throws Exception {
|
||||
OptionalSslHandler handler = new OptionalSslHandler(sslContext);
|
||||
final ByteBuf payload = Unpooled.wrappedBuffer(new byte[] { 22, 3 });
|
||||
try {
|
||||
handler.decode(context, payload, null);
|
||||
verifyZeroInteractions(pipeline);
|
||||
} finally {
|
||||
payload.release();
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user