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The Netty project is an effort to provide an asynchronous event-driven
network application framework and tools for rapid development of
maintainable high performance and high scalability protocol servers and
clients. In other words, Netty is a NIO client server framework which
enables quick and easy development of network applications such as protocol
servers and clients. It greatly simplifies and streamlines network
programming such as TCP and UDP socket server.
/*
* 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.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBufferInputStream;
import javax.crypto.Cipher;
import javax.crypto.EncryptedPrivateKeyInfo;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSessionContext;
import java.io.File;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* A server-side {@link SslContext} which uses JDK's SSL/TLS implementation.
*/
public final class JdkSslServerContext extends JdkSslContext {
private final SSLContext ctx;
private final List nextProtocols;
/**
* Creates a new instance.
*
* @param certChainFile an X.509 certificate chain file in PEM format
* @param keyFile a PKCS#8 private key file in PEM format
*/
public JdkSslServerContext(File certChainFile, File keyFile) throws SSLException {
this(certChainFile, keyFile, null);
}
/**
* Creates a new instance.
*
* @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.
*/
public JdkSslServerContext(File certChainFile, File keyFile, String keyPassword) throws SSLException {
this(null, certChainFile, keyFile, keyPassword, null, null, 0, 0);
}
/**
* Creates a new instance.
*
* @param bufPool the buffer pool which will be used by this context.
* {@code null} to use the default buffer pool.
* @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 ciphers the cipher suites to enable, in the order of preference.
* {@code null} to use the default cipher suites.
* @param nextProtocols the application layer protocols to accept, in the order of preference.
* {@code null} to disable TLS NPN/ALPN extension.
* @param sessionCacheSize the size of the cache used for storing SSL session objects.
* {@code 0} to use the default value.
* @param sessionTimeout the timeout for the cached SSL session objects, in seconds.
* {@code 0} to use the default value.
*/
public JdkSslServerContext(
SslBufferPool bufPool,
File certChainFile, File keyFile, String keyPassword,
Iterable ciphers, Iterable nextProtocols,
long sessionCacheSize, long sessionTimeout) throws SSLException {
super(bufPool, ciphers);
if (certChainFile == null) {
throw new NullPointerException("certChainFile");
}
if (keyFile == null) {
throw new NullPointerException("keyFile");
}
if (keyPassword == null) {
keyPassword = "";
}
if (nextProtocols != null && nextProtocols.iterator().hasNext()) {
if (!JettyNpnSslEngine.isAvailable()) {
throw new SSLException("NPN/ALPN unsupported: " + nextProtocols);
}
List list = new ArrayList();
for (String p: nextProtocols) {
if (p == null) {
break;
}
list.add(p);
}
this.nextProtocols = Collections.unmodifiableList(list);
} else {
this.nextProtocols = Collections.emptyList();
}
String algorithm = Security.getProperty("ssl.KeyManagerFactory.algorithm");
if (algorithm == null) {
algorithm = "SunX509";
}
try {
KeyStore ks = KeyStore.getInstance("JKS");
ks.load(null, null);
CertificateFactory cf = CertificateFactory.getInstance("X.509");
KeyFactory rsaKF = KeyFactory.getInstance("RSA");
KeyFactory dsaKF = KeyFactory.getInstance("DSA");
ChannelBuffer encodedKeyBuf = PemReader.readPrivateKey(keyFile);
byte[] encodedKey = new byte[encodedKeyBuf.readableBytes()];
encodedKeyBuf.readBytes(encodedKey);
char[] keyPasswordChars = keyPassword.toCharArray();
PKCS8EncodedKeySpec encodedKeySpec = generateKeySpec(keyPasswordChars, encodedKey);
PrivateKey key;
try {
key = rsaKF.generatePrivate(encodedKeySpec);
} catch (InvalidKeySpecException ignore) {
key = dsaKF.generatePrivate(encodedKeySpec);
}
List certChain = new ArrayList();
for (ChannelBuffer buf: PemReader.readCertificates(certChainFile)) {
certChain.add(cf.generateCertificate(new ChannelBufferInputStream(buf)));
}
ks.setKeyEntry("key", key, keyPasswordChars, certChain.toArray(new Certificate[certChain.size()]));
// Set up key manager factory to use our key store
KeyManagerFactory kmf = KeyManagerFactory.getInstance(algorithm);
kmf.init(ks, keyPasswordChars);
// Initialize the SSLContext to work with our key managers.
ctx = SSLContext.getInstance(PROTOCOL);
ctx.init(kmf.getKeyManagers(), null, null);
SSLSessionContext sessCtx = ctx.getServerSessionContext();
if (sessionCacheSize > 0) {
sessCtx.setSessionCacheSize((int) Math.min(sessionCacheSize, Integer.MAX_VALUE));
}
if (sessionTimeout > 0) {
sessCtx.setSessionTimeout((int) Math.min(sessionTimeout, Integer.MAX_VALUE));
}
} catch (Exception e) {
throw new SSLException("failed to initialize the server-side SSL context", e);
}
}
@Override
public boolean isClient() {
return false;
}
@Override
public List nextProtocols() {
return nextProtocols;
}
@Override
public SSLContext context() {
return ctx;
}
/**
* Generates a key specification for an (encrypted) private key.
*
* @param password characters, if {@code null} or empty an unencrypted key is assumed
* @param key bytes of the DER encoded private key
*
* @return a key specification
*
* @throws IOException if parsing {@code key} fails
* @throws NoSuchAlgorithmException if the algorithm used to encrypt {@code key} is unkown
* @throws NoSuchPaddingException if the padding scheme specified in the decryption algorithm is unkown
* @throws InvalidKeySpecException if the decryption key based on {@code password} cannot be generated
* @throws InvalidKeyException if the decryption key based on {@code password} cannot be used to decrypt {@code
* key}
* @throws InvalidAlgorithmParameterException if decryption algorithm parameters are somehow faulty
*/
private static PKCS8EncodedKeySpec generateKeySpec(char[] password, byte[] key)
throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException,
InvalidKeyException, InvalidAlgorithmParameterException {
if (password == null || password.length == 0) {
return new PKCS8EncodedKeySpec(key);
}
EncryptedPrivateKeyInfo encryptedPrivateKeyInfo = new EncryptedPrivateKeyInfo(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(encryptedPrivateKeyInfo.getAlgName());
PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
SecretKey pbeKey = keyFactory.generateSecret(pbeKeySpec);
Cipher cipher = Cipher.getInstance(encryptedPrivateKeyInfo.getAlgName());
cipher.init(Cipher.DECRYPT_MODE, pbeKey, encryptedPrivateKeyInfo.getAlgParameters());
return encryptedPrivateKeyInfo.getKeySpec(cipher);
}
}