org.jboss.netty.handler.ssl.JdkSslContext Maven / Gradle / Ivy
/*
* 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 org.jboss.netty.handler.ssl;
import org.jboss.netty.logging.InternalLogger;
import org.jboss.netty.logging.InternalLoggerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLSessionContext;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* An {@link SslContext} which uses JDK's SSL/TLS implementation.
*/
public abstract class JdkSslContext extends SslContext {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(JdkSslContext.class);
static final String PROTOCOL = "TLS";
static final String[] PROTOCOLS;
static final List DEFAULT_CIPHERS;
static {
SSLContext context;
try {
context = SSLContext.getInstance(PROTOCOL);
context.init(null, null, null);
} catch (Exception e) {
throw new Error("failed to initialize the default SSL context", e);
}
SSLEngine engine = context.createSSLEngine();
// Choose the sensible default list of protocols.
String[] supportedProtocols = engine.getSupportedProtocols();
List protocols = new ArrayList();
addIfSupported(
supportedProtocols, protocols,
"TLSv1.2", "TLSv1.1", "TLSv1");
if (!protocols.isEmpty()) {
PROTOCOLS = protocols.toArray(new String[protocols.size()]);
} else {
PROTOCOLS = engine.getEnabledProtocols();
}
// Choose the sensible default list of cipher suites.
String[] supportedCiphers = engine.getSupportedCipherSuites();
List ciphers = new ArrayList();
addIfSupported(
supportedCiphers, ciphers,
// XXX: Make sure to sync this list with OpenSslEngineFactory.
// GCM (Galois/Counter Mode) requires JDK 8.
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
// AES256 requires JCE unlimited strength jurisdiction policy files.
"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
// GCM (Galois/Counter Mode) requires JDK 8.
"TLS_RSA_WITH_AES_128_GCM_SHA256",
"TLS_RSA_WITH_AES_128_CBC_SHA",
// AES256 requires JCE unlimited strength jurisdiction policy files.
"TLS_RSA_WITH_AES_256_CBC_SHA",
"SSL_RSA_WITH_3DES_EDE_CBC_SHA",
"SSL_RSA_WITH_RC4_128_SHA");
if (!ciphers.isEmpty()) {
DEFAULT_CIPHERS = Collections.unmodifiableList(ciphers);
} else {
// Use the default from JDK as fallback.
DEFAULT_CIPHERS = Collections.unmodifiableList(Arrays.asList(engine.getEnabledCipherSuites()));
}
if (logger.isDebugEnabled()) {
logger.debug("Default protocols (JDK): " + Arrays.asList(PROTOCOLS));
logger.debug("Default cipher suites (JDK): " + DEFAULT_CIPHERS);
}
}
private static void addIfSupported(String[] supported, List enabled, String... names) {
for (String n: names) {
for (String s: supported) {
if (n.equals(s)) {
enabled.add(s);
break;
}
}
}
}
private final String[] cipherSuites;
private final List unmodifiableCipherSuites;
JdkSslContext(SslBufferPool bufferPool, Iterable ciphers) {
super(bufferPool);
cipherSuites = toCipherSuiteArray(ciphers);
unmodifiableCipherSuites = Collections.unmodifiableList(Arrays.asList(cipherSuites));
}
/**
* Returns the JDK {@link SSLContext} object held by this context.
*/
public abstract SSLContext context();
/**
* Returns the JDK {@link SSLSessionContext} object held by this context.
*/
public final SSLSessionContext sessionContext() {
if (isServer()) {
return context().getServerSessionContext();
} else {
return context().getClientSessionContext();
}
}
@Override
public final List cipherSuites() {
return unmodifiableCipherSuites;
}
@Override
public final long sessionCacheSize() {
return sessionContext().getSessionCacheSize();
}
@Override
public final long sessionTimeout() {
return sessionContext().getSessionTimeout();
}
@Override
public final SSLEngine newEngine() {
SSLEngine engine = context().createSSLEngine();
engine.setEnabledCipherSuites(cipherSuites);
engine.setEnabledProtocols(PROTOCOLS);
engine.setUseClientMode(isClient());
return wrapEngine(engine);
}
@Override
public final SSLEngine newEngine(String peerHost, int peerPort) {
SSLEngine engine = context().createSSLEngine(peerHost, peerPort);
engine.setEnabledCipherSuites(cipherSuites);
engine.setEnabledProtocols(PROTOCOLS);
engine.setUseClientMode(isClient());
return wrapEngine(engine);
}
private SSLEngine wrapEngine(SSLEngine engine) {
if (nextProtocols().isEmpty()) {
return engine;
} else {
return new JettyNpnSslEngine(engine, nextProtocols(), isServer());
}
}
private static String[] toCipherSuiteArray(Iterable ciphers) {
if (ciphers == null) {
return DEFAULT_CIPHERS.toArray(new String[DEFAULT_CIPHERS.size()]);
} else {
List newCiphers = new ArrayList();
for (String c: ciphers) {
if (c == null) {
break;
}
newCiphers.add(c);
}
return newCiphers.toArray(new String[newCiphers.size()]);
}
}
}