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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:
*
* https://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.ReferenceCountUtil;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
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.Provider;
import java.security.Security;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.spec.InvalidKeySpecException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import javax.crypto.NoSuchPaddingException;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSessionContext;
import static io.netty.handler.ssl.SslUtils.DEFAULT_CIPHER_SUITES;
import static io.netty.handler.ssl.SslUtils.addIfSupported;
import static io.netty.handler.ssl.SslUtils.useFallbackCiphersIfDefaultIsEmpty;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* 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";
private static final String[] DEFAULT_PROTOCOLS;
private static final List DEFAULT_CIPHERS;
private static final List DEFAULT_CIPHERS_NON_TLSV13;
private static final Set SUPPORTED_CIPHERS;
private static final Set SUPPORTED_CIPHERS_NON_TLSV13;
private static final Provider DEFAULT_PROVIDER;
static {
Defaults defaults = new Defaults();
defaults.init();
DEFAULT_PROVIDER = defaults.defaultProvider;
DEFAULT_PROTOCOLS = defaults.defaultProtocols;
SUPPORTED_CIPHERS = defaults.supportedCiphers;
DEFAULT_CIPHERS = defaults.defaultCiphers;
DEFAULT_CIPHERS_NON_TLSV13 = defaults.defaultCiphersNonTLSv13;
SUPPORTED_CIPHERS_NON_TLSV13 = defaults.supportedCiphersNonTLSv13;
if (logger.isDebugEnabled()) {
logger.debug("Default protocols (JDK): {} ", Arrays.asList(DEFAULT_PROTOCOLS));
logger.debug("Default cipher suites (JDK): {}", DEFAULT_CIPHERS);
}
}
private static final class Defaults {
String[] defaultProtocols;
List defaultCiphers;
List defaultCiphersNonTLSv13;
Set supportedCiphers;
Set supportedCiphersNonTLSv13;
Provider defaultProvider;
void init() {
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);
}
defaultProvider = context.getProvider();
SSLEngine engine = context.createSSLEngine();
defaultProtocols = defaultProtocols(context, engine);
supportedCiphers = Collections.unmodifiableSet(supportedCiphers(engine));
defaultCiphers = Collections.unmodifiableList(defaultCiphers(engine, supportedCiphers));
List ciphersNonTLSv13 = new ArrayList(defaultCiphers);
ciphersNonTLSv13.removeAll(Arrays.asList(SslUtils.DEFAULT_TLSV13_CIPHER_SUITES));
defaultCiphersNonTLSv13 = Collections.unmodifiableList(ciphersNonTLSv13);
Set suppertedCiphersNonTLSv13 = new LinkedHashSet(supportedCiphers);
suppertedCiphersNonTLSv13.removeAll(Arrays.asList(SslUtils.DEFAULT_TLSV13_CIPHER_SUITES));
supportedCiphersNonTLSv13 = Collections.unmodifiableSet(suppertedCiphersNonTLSv13);
}
}
private static String[] defaultProtocols(SSLContext context, SSLEngine engine) {
// Choose the sensible default list of protocols that respects JDK flags, eg. jdk.tls.client.protocols
final String[] supportedProtocols = context.getDefaultSSLParameters().getProtocols();
Set supportedProtocolsSet = new HashSet(supportedProtocols.length);
Collections.addAll(supportedProtocolsSet, supportedProtocols);
List protocols = new ArrayList();
addIfSupported(
supportedProtocolsSet, protocols,
SslProtocols.TLS_v1_3, SslProtocols.TLS_v1_2,
SslProtocols.TLS_v1_1, SslProtocols.TLS_v1);
if (!protocols.isEmpty()) {
return protocols.toArray(EmptyArrays.EMPTY_STRINGS);
}
return engine.getEnabledProtocols();
}
private static Set supportedCiphers(SSLEngine engine) {
// Choose the sensible default list of cipher suites.
final String[] supportedCiphers = engine.getSupportedCipherSuites();
Set supportedCiphersSet = new LinkedHashSet(supportedCiphers.length);
for (int i = 0; i < supportedCiphers.length; ++i) {
String supportedCipher = supportedCiphers[i];
supportedCiphersSet.add(supportedCipher);
// IBM's J9 JVM utilizes a custom naming scheme for ciphers and only returns ciphers with the "SSL_"
// prefix instead of the "TLS_" prefix (as defined in the JSSE cipher suite names [1]). According to IBM's
// documentation [2] the "SSL_" prefix is "interchangeable" with the "TLS_" prefix.
// See the IBM forum discussion [3] and issue on IBM's JVM [4] for more details.
//[1] https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#ciphersuites
//[2] https://www.ibm.com/support/knowledgecenter/en/SSYKE2_8.0.0/com.ibm.java.security.component.80.doc/
// security-component/jsse2Docs/ciphersuites.html
//[3] https://www.ibm.com/developerworks/community/forums/html/topic?id=9b5a56a9-fa46-4031-b33b-df91e28d77c2
//[4] https://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=71770
if (supportedCipher.startsWith("SSL_")) {
final String tlsPrefixedCipherName = "TLS_" + supportedCipher.substring("SSL_".length());
try {
engine.setEnabledCipherSuites(new String[]{tlsPrefixedCipherName});
supportedCiphersSet.add(tlsPrefixedCipherName);
} catch (IllegalArgumentException ignored) {
// The cipher is not supported ... move on to the next cipher.
}
}
}
return supportedCiphersSet;
}
private static List defaultCiphers(SSLEngine engine, Set supportedCiphers) {
List ciphers = new ArrayList();
addIfSupported(supportedCiphers, ciphers, DEFAULT_CIPHER_SUITES);
useFallbackCiphersIfDefaultIsEmpty(ciphers, engine.getEnabledCipherSuites());
return ciphers;
}
private static boolean isTlsV13Supported(String[] protocols) {
for (String protocol: protocols) {
if (SslProtocols.TLS_v1_3.equals(protocol)) {
return true;
}
}
return false;
}
private final String[] protocols;
private final String[] cipherSuites;
private final List unmodifiableCipherSuites;
@SuppressWarnings("deprecation")
private final JdkApplicationProtocolNegotiator apn;
private final ClientAuth clientAuth;
private final SSLContext sslContext;
private final boolean isClient;
private final String endpointIdentificationAlgorithm;
/**
* 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}.
* @deprecated Use {@link #JdkSslContext(SSLContext, boolean, Iterable, CipherSuiteFilter,
* ApplicationProtocolConfig, ClientAuth, String[], boolean)}
*/
@Deprecated
public JdkSslContext(SSLContext sslContext, boolean isClient,
ClientAuth clientAuth) {
this(sslContext, isClient, null, IdentityCipherSuiteFilter.INSTANCE,
JdkDefaultApplicationProtocolNegotiator.INSTANCE, clientAuth, null, 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 standard 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}.
* @deprecated Use {@link #JdkSslContext(SSLContext, boolean, Iterable, CipherSuiteFilter,
* ApplicationProtocolConfig, ClientAuth, String[], boolean)}
*/
@Deprecated
public JdkSslContext(SSLContext sslContext, boolean isClient, Iterable ciphers,
CipherSuiteFilter cipherFilter, ApplicationProtocolConfig apn,
ClientAuth clientAuth) {
this(sslContext, isClient, ciphers, cipherFilter, apn, clientAuth, null, 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 standard 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}.
* @param protocols the protocols to enable, or {@code null} to enable the default protocols.
* @param startTls {@code true} if the first write request shouldn't be encrypted
*/
public JdkSslContext(SSLContext sslContext,
boolean isClient,
Iterable ciphers,
CipherSuiteFilter cipherFilter,
ApplicationProtocolConfig apn,
ClientAuth clientAuth,
String[] protocols,
boolean startTls) {
this(sslContext,
isClient,
ciphers,
cipherFilter,
toNegotiator(apn, !isClient),
clientAuth,
protocols == null ? null : protocols.clone(),
startTls);
}
@SuppressWarnings("deprecation")
JdkSslContext(SSLContext sslContext, boolean isClient, Iterable ciphers, CipherSuiteFilter cipherFilter,
JdkApplicationProtocolNegotiator apn, ClientAuth clientAuth, String[] protocols, boolean startTls) {
this(sslContext, isClient, ciphers, cipherFilter, apn, clientAuth, protocols, startTls, null);
}
@SuppressWarnings("deprecation")
JdkSslContext(SSLContext sslContext, boolean isClient, Iterable ciphers, CipherSuiteFilter cipherFilter,
JdkApplicationProtocolNegotiator apn, ClientAuth clientAuth, String[] protocols, boolean startTls,
String endpointIdentificationAlgorithm) {
super(startTls);
this.apn = checkNotNull(apn, "apn");
this.clientAuth = checkNotNull(clientAuth, "clientAuth");
this.sslContext = checkNotNull(sslContext, "sslContext");
this.endpointIdentificationAlgorithm = endpointIdentificationAlgorithm;
final List defaultCiphers;
final Set supportedCiphers;
if (DEFAULT_PROVIDER.equals(sslContext.getProvider())) {
this.protocols = protocols == null? DEFAULT_PROTOCOLS : protocols;
if (isTlsV13Supported(this.protocols)) {
supportedCiphers = SUPPORTED_CIPHERS;
defaultCiphers = DEFAULT_CIPHERS;
} else {
// TLSv1.3 is not supported, ensure we do not include any TLSv1.3 ciphersuite.
supportedCiphers = SUPPORTED_CIPHERS_NON_TLSV13;
defaultCiphers = DEFAULT_CIPHERS_NON_TLSV13;
}
} else {
// This is a different Provider then the one used by the JDK by default so we can not just assume
// the same protocols and ciphers are supported. For example even if Java11+ is used Conscrypt will
// not support TLSv1.3 and the TLSv1.3 ciphersuites.
SSLEngine engine = sslContext.createSSLEngine();
try {
if (protocols == null) {
this.protocols = defaultProtocols(sslContext, engine);
} else {
this.protocols = protocols;
}
supportedCiphers = supportedCiphers(engine);
defaultCiphers = defaultCiphers(engine, supportedCiphers);
if (!isTlsV13Supported(this.protocols)) {
// TLSv1.3 is not supported, ensure we do not include any TLSv1.3 ciphersuite.
for (String cipher: SslUtils.DEFAULT_TLSV13_CIPHER_SUITES) {
supportedCiphers.remove(cipher);
defaultCiphers.remove(cipher);
}
}
} finally {
ReferenceCountUtil.release(engine);
}
}
cipherSuites = checkNotNull(cipherFilter, "cipherFilter").filterCipherSuites(
ciphers, defaultCiphers, supportedCiphers);
unmodifiableCipherSuites = Collections.unmodifiableList(Arrays.asList(cipherSuites));
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 SSLEngine newEngine(ByteBufAllocator alloc) {
return configureAndWrapEngine(context().createSSLEngine(), alloc);
}
@Override
public final SSLEngine newEngine(ByteBufAllocator alloc, String peerHost, int peerPort) {
return configureAndWrapEngine(context().createSSLEngine(peerHost, peerPort), alloc);
}
@SuppressWarnings("deprecation")
private SSLEngine configureAndWrapEngine(SSLEngine engine, ByteBufAllocator alloc) {
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;
case NONE:
break; // exhaustive cases
default:
throw new Error("Unknown auth " + clientAuth);
}
}
configureEndpointVerification(engine);
JdkApplicationProtocolNegotiator.SslEngineWrapperFactory factory = apn.wrapperFactory();
if (factory instanceof JdkApplicationProtocolNegotiator.AllocatorAwareSslEngineWrapperFactory) {
return ((JdkApplicationProtocolNegotiator.AllocatorAwareSslEngineWrapperFactory) factory)
.wrapSslEngine(engine, alloc, apn, isServer());
}
return factory.wrapSslEngine(engine, apn, isServer());
}
private void configureEndpointVerification(SSLEngine engine) {
SSLParameters params = engine.getSSLParameters();
params.setEndpointIdentificationAlgorithm(endpointIdentificationAlgorithm);
engine.setSSLParameters(params);
}
@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
*/
@SuppressWarnings("deprecation")
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 an 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}
* @param keyStore the {@link KeyStore} that should be used in the {@link KeyManagerFactory}
* @return A {@link KeyManagerFactory} based upon a key file, key file password, and a certificate chain.
*/
static KeyManagerFactory buildKeyManagerFactory(File certChainFile, File keyFile, String keyPassword,
KeyManagerFactory kmf, String keyStore)
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, keyStore);
}
/**
* Build a {@link KeyManagerFactory} based upon a key file, key file password, and a certificate chain.
* @param certChainFile an 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 {
return buildKeyManagerFactory(certChainFile, keyFile, keyPassword, kmf, KeyStore.getDefaultType());
}
/**
* Build a {@link KeyManagerFactory} based upon a key algorithm, key file, key file password,
* and a certificate chain.
* @param certChainFile an 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}
* @param keyStore the {@link KeyStore} that should be used in the {@link KeyManagerFactory}
* @return A {@link KeyManagerFactory} based upon a key algorithm, key file, key file password,
* and a certificate chain.
*/
static KeyManagerFactory buildKeyManagerFactory(File certChainFile,
String keyAlgorithm, File keyFile, String keyPassword, KeyManagerFactory kmf,
String keyStore)
throws KeyStoreException, NoSuchAlgorithmException, NoSuchPaddingException,
InvalidKeySpecException, InvalidAlgorithmParameterException, IOException,
CertificateException, KeyException, UnrecoverableKeyException {
return buildKeyManagerFactory(toX509Certificates(certChainFile), keyAlgorithm,
toPrivateKey(keyFile, keyPassword), keyPassword, kmf, keyStore);
}
/**
* Build a {@link KeyManagerFactory} based upon a key algorithm, key file, key file password,
* and a certificate chain.
* @param certChainFile an buildKeyManagerFactory 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, KeyStore.getDefaultType());
}
}
