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/*
* Copyright 2015-2017 GenerallyCloud.com
*
* Licensed 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 com.generallycloud.baseio.component.ssl;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLSessionContext;
import com.generallycloud.baseio.common.Logger;
import com.generallycloud.baseio.common.LoggerFactory;
import com.generallycloud.baseio.common.LoggerUtil;
/**
* An {@link SslContext} which uses JDK's SSL/TLS implementation.
*/
public class JdkSslContext extends SslContext {
private static final Logger logger = LoggerFactory.getLogger(JdkSslContext.class);
static final String PROTOCOL = "TLS";
static final String[] PROTOCOLS;
static final List DEFAULT_CIPHERS;
static final Set SUPPORTED_CIPHERS;
static {
SSLContext context;
int i;
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.
final String[] supportedProtocols = engine.getSupportedProtocols();
Set supportedProtocolsSet = new HashSet(supportedProtocols.length);
for (i = 0; i < supportedProtocols.length; ++i) {
supportedProtocolsSet.add(supportedProtocols[i]);
}
List protocols = new ArrayList();
addIfSupported(supportedProtocolsSet, 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.
final String[] supportedCiphers = engine.getSupportedCipherSuites();
SUPPORTED_CIPHERS = new HashSet(supportedCiphers.length);
for (i = 0; i < supportedCiphers.length; ++i) {
SUPPORTED_CIPHERS.add(supportedCiphers[i]);
}
List ciphers = new ArrayList();
addIfSupported(SUPPORTED_CIPHERS,
ciphers,
// XXX: Make sure to sync this list with
// OpenSslEngineFactory.
// GCM (Galois/Counter Mode) requires JDK 8.
"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
"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");
if (ciphers.isEmpty()) {
// Use the default from JDK as fallback.
for (String cipher : engine.getEnabledCipherSuites()) {
if (cipher.contains("_RC4_")) {
continue;
}
ciphers.add(cipher);
}
}
DEFAULT_CIPHERS = Collections.unmodifiableList(ciphers);
LoggerUtil.prettyNIOServerLog(logger, "Default protocols (JDK): {} ", Arrays.asList(PROTOCOLS));
LoggerUtil.prettyNIOServerLog(logger, "Default cipher suites (JDK): {}", DEFAULT_CIPHERS);
}
private static void addIfSupported(Set supported, List enabled, String... names) {
for (String n : names) {
if (supported.contains(n)) {
enabled.add(n);
}
}
}
private final String[] cipherSuites;
private final List unmodifiableCipherSuites;
private final JdkApplicationProtocolNegotiator apn;
private final ClientAuth clientAuth;
private final SSLContext sslContext;
private final boolean isClient;
/**
* Creates a new {@link JdkSslContext} from a pre-configured
* {@link SSLContext}.
*
* @param sslContext
* the {@link SSLContext} to use.
* @param isClient
* {@code true} if this context should create {@link SSLEngine}
* s for client-side usage.
* @param clientAuth
* the {@link ClientAuth} to use. This will only be used when
* @param isClient
* is {@code false}.
*/
public JdkSslContext(SSLContext sslContext, boolean isClient, ClientAuth clientAuth) {
this(sslContext, isClient, null, IdentityCipherSuiteFilter.INSTANCE,
JdkDefaultApplicationProtocolNegotiator.INSTANCE, clientAuth, false);
}
/**
* Creates a new {@link JdkSslContext} from a pre-configured
* {@link SSLContext}.
*
* @param sslContext
* the {@link SSLContext} to use.
* @param isClient
* {@code true} if this context should create {@link SSLEngine}
* s for client-side usage.
* @param ciphers
* the ciphers to use or {@code null} if the standart should be
* used.
* @param cipherFilter
* the filter to use.
* @param apn
* the {@link ApplicationProtocolConfig} to use.
* @param clientAuth
* the {@link ClientAuth} to use. This will only be used when
* @param isClient
* is {@code false}.
*/
public JdkSslContext(SSLContext sslContext, boolean isClient, Iterable ciphers,
CipherSuiteFilter cipherFilter, ApplicationProtocolConfig apn, ClientAuth clientAuth) {
this(sslContext, isClient, ciphers, cipherFilter, toNegotiator(apn, !isClient), clientAuth, false);
}
JdkSslContext(SSLContext sslContext, boolean isClient, Iterable ciphers, CipherSuiteFilter cipherFilter,
JdkApplicationProtocolNegotiator apn, ClientAuth clientAuth, boolean startTls) {
this.apn = apn;
this.clientAuth = clientAuth;
cipherSuites = cipherFilter.filterCipherSuites(ciphers, DEFAULT_CIPHERS,
SUPPORTED_CIPHERS);
unmodifiableCipherSuites = Collections.unmodifiableList(Arrays.asList(cipherSuites));
this.sslContext = sslContext;
this.isClient = isClient;
}
/**
* Returns the JDK {@link SSLContext} object held by this context.
*/
public final SSLContext context() {
return sslContext;
}
@Override
public final boolean isClient() {
return isClient;
}
/**
* Returns the JDK {@link SSLSessionContext} object held by this context.
*/
@Override
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() {
return configureAndWrapEngine(context().createSSLEngine());
}
@Override
public final SSLEngine newEngine(String peerHost, int peerPort) {
return configureAndWrapEngine(context().createSSLEngine(peerHost, peerPort));
}
private SSLEngine configureAndWrapEngine(SSLEngine engine) {
engine.setEnabledCipherSuites(cipherSuites);
engine.setEnabledProtocols(PROTOCOLS);
engine.setUseClientMode(isClient());
if (isServer()) {
switch (clientAuth) {
case OPTIONAL:
engine.setWantClientAuth(true);
break;
case REQUIRE:
engine.setNeedClientAuth(true);
break;
default:
break;
}
}
return apn.wrapperFactory().wrapSslEngine(engine, apn, isServer());
}
@Override
public final JdkApplicationProtocolNegotiator applicationProtocolNegotiator() {
return apn;
}
/**
* Translate a {@link ApplicationProtocolConfig} object to a
* {@link JdkApplicationProtocolNegotiator} object.
*
* @param config
* The configuration which defines the translation
* @param isServer
* {@code true} if a server {@code false} otherwise.
* @return The results of the translation
*/
static JdkApplicationProtocolNegotiator toNegotiator(ApplicationProtocolConfig config, boolean isServer) {
if (config == null) {
return JdkDefaultApplicationProtocolNegotiator.INSTANCE;
}
switch (config.protocol()) {
case NONE:
return JdkDefaultApplicationProtocolNegotiator.INSTANCE;
case ALPN:
if (isServer) {
switch (config.selectorFailureBehavior()) {
case FATAL_ALERT:
return new JdkAlpnApplicationProtocolNegotiator(true, config.supportedProtocols());
case NO_ADVERTISE:
return new JdkAlpnApplicationProtocolNegotiator(false, config.supportedProtocols());
default:
throw new UnsupportedOperationException(new StringBuilder("JDK provider does not support ")
.append(config.selectorFailureBehavior()).append(" failure behavior").toString());
}
} else {
switch (config.selectedListenerFailureBehavior()) {
case ACCEPT:
return new JdkAlpnApplicationProtocolNegotiator(false, config.supportedProtocols());
case FATAL_ALERT:
return new JdkAlpnApplicationProtocolNegotiator(true, config.supportedProtocols());
default:
throw new UnsupportedOperationException(new StringBuilder("JDK provider does not support ")
.append(config.selectedListenerFailureBehavior()).append(" failure behavior")
.toString());
}
}
case NPN:
if (isServer) {
switch (config.selectedListenerFailureBehavior()) {
case ACCEPT:
return new JdkNpnApplicationProtocolNegotiator(false, config.supportedProtocols());
case FATAL_ALERT:
return new JdkNpnApplicationProtocolNegotiator(true, config.supportedProtocols());
default:
throw new UnsupportedOperationException(new StringBuilder("JDK provider does not support ")
.append(config.selectedListenerFailureBehavior()).append(" failure behavior")
.toString());
}
} else {
switch (config.selectorFailureBehavior()) {
case FATAL_ALERT:
return new JdkNpnApplicationProtocolNegotiator(true, config.supportedProtocols());
case NO_ADVERTISE:
return new JdkNpnApplicationProtocolNegotiator(false, config.supportedProtocols());
default:
throw new UnsupportedOperationException(new StringBuilder("JDK provider does not support ")
.append(config.selectorFailureBehavior()).append(" failure behavior").toString());
}
}
default:
throw new UnsupportedOperationException(new StringBuilder("JDK provider does not support ")
.append(config.protocol()).append(" protocol").toString());
}
}
}
