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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 io.netty.buffer.ByteBufAllocator;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import javax.crypto.NoSuchPaddingException;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLSessionContext;
import java.io.File;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Security;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.security.spec.InvalidKeySpecException;
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 static io.netty.util.internal.ObjectUtil.*;
/**
* An {@link SslContext} which uses JDK's SSL/TLS implementation.
*/
public 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 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);
if (logger.isDebugEnabled()) {
logger.debug("Default protocols (JDK): {} ", Arrays.asList(PROTOCOLS));
logger.debug("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) {
super(startTls);
this.apn = checkNotNull(apn, "apn");
this.clientAuth = checkNotNull(clientAuth, "clientAuth");
cipherSuites = checkNotNull(cipherFilter, "cipherFilter").filterCipherSuites(
ciphers, DEFAULT_CIPHERS, SUPPORTED_CIPHERS);
unmodifiableCipherSuites = Collections.unmodifiableList(Arrays.asList(cipherSuites));
this.sslContext = checkNotNull(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(ByteBufAllocator alloc) {
return configureAndWrapEngine(context().createSSLEngine());
}
@Override
public final SSLEngine newEngine(ByteBufAllocator alloc, 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;
}
}
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());
}
}
/**
* Build a {@link KeyManagerFactory} based upon a key file, key file password, and a certificate chain.
* @param certChainFile a X.509 certificate chain file in PEM format
* @param keyFile a PKCS#8 private key file in PEM format
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
* @param kmf The existing {@link KeyManagerFactory} that will be used if not {@code null}
* @return A {@link KeyManagerFactory} based upon a key file, key file password, and a certificate chain.
* @deprecated will be removed.
*/
@Deprecated
protected static KeyManagerFactory buildKeyManagerFactory(File certChainFile, File keyFile, String keyPassword,
KeyManagerFactory kmf)
throws UnrecoverableKeyException, KeyStoreException, NoSuchAlgorithmException,
NoSuchPaddingException, InvalidKeySpecException, InvalidAlgorithmParameterException,
CertificateException, KeyException, IOException {
String algorithm = Security.getProperty("ssl.KeyManagerFactory.algorithm");
if (algorithm == null) {
algorithm = "SunX509";
}
return buildKeyManagerFactory(certChainFile, algorithm, keyFile, keyPassword, kmf);
}
/**
* Build a {@link KeyManagerFactory} based upon a key algorithm, key file, key file password,
* and a certificate chain.
* @param certChainFile a X.509 certificate chain file in PEM format
* @param keyAlgorithm the standard name of the requested algorithm. See the Java Secure Socket Extension
* Reference Guide for information about standard algorithm names.
* @param keyFile a PKCS#8 private key file in PEM format
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
* @param kmf The existing {@link KeyManagerFactory} that will be used if not {@code null}
* @return A {@link KeyManagerFactory} based upon a key algorithm, key file, key file password,
* and a certificate chain.
* @deprecated will be removed.
*/
@Deprecated
protected static KeyManagerFactory buildKeyManagerFactory(File certChainFile,
String keyAlgorithm, File keyFile, String keyPassword, KeyManagerFactory kmf)
throws KeyStoreException, NoSuchAlgorithmException, NoSuchPaddingException,
InvalidKeySpecException, InvalidAlgorithmParameterException, IOException,
CertificateException, KeyException, UnrecoverableKeyException {
return buildKeyManagerFactory(toX509Certificates(certChainFile), keyAlgorithm,
toPrivateKey(keyFile, keyPassword), keyPassword, kmf);
}
}