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/*
* Copyright 2014 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 static io.netty.handler.ssl.ApplicationProtocolUtil.toList;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLHandshakeException;
/**
* Common base class for {@link JdkApplicationProtocolNegotiator} classes to inherit from.
*/
class JdkBaseApplicationProtocolNegotiator implements JdkApplicationProtocolNegotiator {
private final List protocols;
private final ProtocolSelectorFactory selectorFactory;
private final ProtocolSelectionListenerFactory listenerFactory;
private final SslEngineWrapperFactory wrapperFactory;
/**
* Create a new instance.
* @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
* @param selectorFactory How the peer selecting the protocol should behave.
* @param listenerFactory How the peer being notified of the selected protocol should behave.
* @param protocols The order of iteration determines the preference of support for protocols.
*/
JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
Iterable protocols) {
this(wrapperFactory, selectorFactory, listenerFactory, toList(protocols));
}
/**
* Create a new instance.
* @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
* @param selectorFactory How the peer selecting the protocol should behave.
* @param listenerFactory How the peer being notified of the selected protocol should behave.
* @param protocols The order of iteration determines the preference of support for protocols.
*/
JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
String... protocols) {
this(wrapperFactory, selectorFactory, listenerFactory, toList(protocols));
}
/**
* Create a new instance.
* @param wrapperFactory Determines which application protocol will be used by wrapping the SSLEngine in use.
* @param selectorFactory How the peer selecting the protocol should behave.
* @param listenerFactory How the peer being notified of the selected protocol should behave.
* @param protocols The order of iteration determines the preference of support for protocols.
*/
private JdkBaseApplicationProtocolNegotiator(SslEngineWrapperFactory wrapperFactory,
ProtocolSelectorFactory selectorFactory, ProtocolSelectionListenerFactory listenerFactory,
List protocols) {
this.wrapperFactory = checkNotNull(wrapperFactory, "wrapperFactory");
this.selectorFactory = checkNotNull(selectorFactory, "selectorFactory");
this.listenerFactory = checkNotNull(listenerFactory, "listenerFactory");
this.protocols = Collections.unmodifiableList(checkNotNull(protocols, "protocols"));
}
@Override
public List protocols() {
return protocols;
}
@Override
public ProtocolSelectorFactory protocolSelectorFactory() {
return selectorFactory;
}
@Override
public ProtocolSelectionListenerFactory protocolListenerFactory() {
return listenerFactory;
}
@Override
public SslEngineWrapperFactory wrapperFactory() {
return wrapperFactory;
}
static final ProtocolSelectorFactory FAIL_SELECTOR_FACTORY = new ProtocolSelectorFactory() {
@Override
public ProtocolSelector newSelector(SSLEngine engine, Set supportedProtocols) {
return new FailProtocolSelector((JdkSslEngine) engine, supportedProtocols);
}
};
static final ProtocolSelectorFactory NO_FAIL_SELECTOR_FACTORY = new ProtocolSelectorFactory() {
@Override
public ProtocolSelector newSelector(SSLEngine engine, Set supportedProtocols) {
return new NoFailProtocolSelector((JdkSslEngine) engine, supportedProtocols);
}
};
static final ProtocolSelectionListenerFactory FAIL_SELECTION_LISTENER_FACTORY =
new ProtocolSelectionListenerFactory() {
@Override
public ProtocolSelectionListener newListener(SSLEngine engine, List supportedProtocols) {
return new FailProtocolSelectionListener((JdkSslEngine) engine, supportedProtocols);
}
};
static final ProtocolSelectionListenerFactory NO_FAIL_SELECTION_LISTENER_FACTORY =
new ProtocolSelectionListenerFactory() {
@Override
public ProtocolSelectionListener newListener(SSLEngine engine, List supportedProtocols) {
return new NoFailProtocolSelectionListener((JdkSslEngine) engine, supportedProtocols);
}
};
static class NoFailProtocolSelector implements ProtocolSelector {
private final JdkSslEngine engineWrapper;
private final Set supportedProtocols;
NoFailProtocolSelector(JdkSslEngine engineWrapper, Set supportedProtocols) {
this.engineWrapper = engineWrapper;
this.supportedProtocols = supportedProtocols;
}
@Override
public void unsupported() {
engineWrapper.getSession().setApplicationProtocol(null);
}
@Override
public String select(List protocols) throws Exception {
for (String p : supportedProtocols) {
if (protocols.contains(p)) {
engineWrapper.getSession().setApplicationProtocol(p);
return p;
}
}
return noSelectMatchFound();
}
public String noSelectMatchFound() throws Exception {
engineWrapper.getSession().setApplicationProtocol(null);
return null;
}
}
private static final class FailProtocolSelector extends NoFailProtocolSelector {
FailProtocolSelector(JdkSslEngine engineWrapper, Set supportedProtocols) {
super(engineWrapper, supportedProtocols);
}
@Override
public String noSelectMatchFound() throws Exception {
throw new SSLHandshakeException("Selected protocol is not supported");
}
}
private static class NoFailProtocolSelectionListener implements ProtocolSelectionListener {
private final JdkSslEngine engineWrapper;
private final List supportedProtocols;
NoFailProtocolSelectionListener(JdkSslEngine engineWrapper, List supportedProtocols) {
this.engineWrapper = engineWrapper;
this.supportedProtocols = supportedProtocols;
}
@Override
public void unsupported() {
engineWrapper.getSession().setApplicationProtocol(null);
}
@Override
public void selected(String protocol) throws Exception {
if (supportedProtocols.contains(protocol)) {
engineWrapper.getSession().setApplicationProtocol(protocol);
} else {
noSelectedMatchFound(protocol);
}
}
protected void noSelectedMatchFound(String protocol) throws Exception {
// Will never be called.
}
}
private static final class FailProtocolSelectionListener extends NoFailProtocolSelectionListener {
FailProtocolSelectionListener(JdkSslEngine engineWrapper, List supportedProtocols) {
super(engineWrapper, supportedProtocols);
}
@Override
protected void noSelectedMatchFound(String protocol) throws Exception {
throw new SSLHandshakeException("No compatible protocols found");
}
}
}
