/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.conn.ssl;
import org.apache.http.annotation.ThreadSafe;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.scheme.HostNameResolver;
import org.apache.http.conn.scheme.LayeredSchemeSocketFactory;
import org.apache.http.conn.scheme.LayeredSocketFactory;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.UnrecoverableKeyException;
/**
* Layered socket factory for TLS/SSL connections.
* <p>
* SSLSocketFactory can be used to validate the identity of the HTTPS server against a list of
* trusted certificates and to authenticate to the HTTPS server using a private key.
* <p>
* SSLSocketFactory will enable server authentication when supplied with
* a {@link KeyStore trust-store} file containing one or several trusted certificates. The client
* secure socket will reject the connection during the SSL session handshake if the target HTTPS
* server attempts to authenticate itself with a non-trusted certificate.
* <p>
* Use JDK keytool utility to import a trusted certificate and generate a trust-store file:
* <pre>
* keytool -import -alias "my server cert" -file server.crt -keystore my.truststore
* </pre>
* <p>
* In special cases the standard trust verification process can be bypassed by using a custom
* {@link TrustStrategy}. This interface is primarily intended for allowing self-signed
* certificates to be accepted as trusted without having to add them to the trust-store file.
* <p>
* The following parameters can be used to customize the behavior of this
* class:
* <ul>
* <li>{@link org.apache.http.params.CoreConnectionPNames#CONNECTION_TIMEOUT}</li>
* <li>{@link org.apache.http.params.CoreConnectionPNames#SO_TIMEOUT}</li>
* <li>{@link org.apache.http.params.CoreConnectionPNames#SO_REUSEADDR}</li>
* </ul>
* <p>
* SSLSocketFactory will enable client authentication when supplied with
* a {@link KeyStore key-store} file containing a private key/public certificate
* pair. The client secure socket will use the private key to authenticate
* itself to the target HTTPS server during the SSL session handshake if
* requested to do so by the server.
* The target HTTPS server will in its turn verify the certificate presented
* by the client in order to establish client's authenticity
* <p>
* Use the following sequence of actions to generate a key-store file
* </p>
* <ul>
* <li>
* <p>
* Use JDK keytool utility to generate a new key
* <pre>keytool -genkey -v -alias "my client key" -validity 365 -keystore my.keystore</pre>
* For simplicity use the same password for the key as that of the key-store
* </p>
* </li>
* <li>
* <p>
* Issue a certificate signing request (CSR)
* <pre>keytool -certreq -alias "my client key" -file mycertreq.csr -keystore my.keystore</pre>
* </p>
* </li>
* <li>
* <p>
* Send the certificate request to the trusted Certificate Authority for signature.
* One may choose to act as her own CA and sign the certificate request using a PKI
* tool, such as OpenSSL.
* </p>
* </li>
* <li>
* <p>
* Import the trusted CA root certificate
* <pre>keytool -import -alias "my trusted ca" -file caroot.crt -keystore my.keystore</pre>
* </p>
* </li>
* <li>
* <p>
* Import the PKCS#7 file containg the complete certificate chain
* <pre>keytool -import -alias "my client key" -file mycert.p7 -keystore my.keystore</pre>
* </p>
* </li>
* <li>
* <p>
* Verify the content the resultant keystore file
* <pre>keytool -list -v -keystore my.keystore</pre>
* </p>
* </li>
* </ul>
*
* @since 4.0
*/
@SuppressWarnings("deprecation")
@ThreadSafe
public class SSLSocketFactory implements LayeredSchemeSocketFactory, LayeredSocketFactory {
public static final String TLS = "TLS";
public static final String SSL = "SSL";
public static final String SSLV2 = "SSLv2";
public static final X509HostnameVerifier ALLOW_ALL_HOSTNAME_VERIFIER
= new AllowAllHostnameVerifier();
public static final X509HostnameVerifier BROWSER_COMPATIBLE_HOSTNAME_VERIFIER
= new BrowserCompatHostnameVerifier();
public static final X509HostnameVerifier STRICT_HOSTNAME_VERIFIER
= new StrictHostnameVerifier();
/**
* Gets the default factory, which uses the default JVM settings for secure
* connections.
*
* @return the default factory
*/
public static SSLSocketFactory getSocketFactory() {
return new SSLSocketFactory();
}
private final javax.net.ssl.SSLSocketFactory socketfactory;
private final HostNameResolver nameResolver;
// TODO: make final
private volatile X509HostnameVerifier hostnameVerifier;
private static SSLContext createSSLContext(
String algorithm,
final KeyStore keystore,
final String keystorePassword,
final KeyStore truststore,
final SecureRandom random,
final TrustStrategy trustStrategy)
throws NoSuchAlgorithmException, KeyStoreException, UnrecoverableKeyException, KeyManagementException {
if (algorithm == null) {
algorithm = TLS;
}
KeyManagerFactory kmfactory = KeyManagerFactory.getInstance(
KeyManagerFactory.getDefaultAlgorithm());
kmfactory.init(keystore, keystorePassword != null ? keystorePassword.toCharArray(): null);
KeyManager[] keymanagers = kmfactory.getKeyManagers();
TrustManagerFactory tmfactory = TrustManagerFactory.getInstance(
TrustManagerFactory.getDefaultAlgorithm());
tmfactory.init(truststore);
TrustManager[] trustmanagers = tmfactory.getTrustManagers();
if (trustmanagers != null && trustStrategy != null) {
for (int i = 0; i < trustmanagers.length; i++) {
TrustManager tm = trustmanagers[i];
if (tm instanceof X509TrustManager) {
trustmanagers[i] = new TrustManagerDecorator(
(X509TrustManager) tm, trustStrategy);
}
}
}
SSLContext sslcontext = SSLContext.getInstance(algorithm);
sslcontext.init(keymanagers, trustmanagers, random);
return sslcontext;
}
private static SSLContext createDefaultSSLContext() {
try {
return createSSLContext(TLS, null, null, null, null, null);
} catch (Exception ex) {
throw new IllegalStateException("Failure initializing default SSL context", ex);
}
}
/**
* @deprecated Use {@link #SSLSocketFactory(String, KeyStore, String, KeyStore, SecureRandom, X509HostnameVerifier)}
*/
@Deprecated
public SSLSocketFactory(
final String algorithm,
final KeyStore keystore,
final String keystorePassword,
final KeyStore truststore,
final SecureRandom random,
final HostNameResolver nameResolver)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(createSSLContext(
algorithm, keystore, keystorePassword, truststore, random, null),
nameResolver);
}
/**
* @since 4.1
*/
public SSLSocketFactory(
String algorithm,
final KeyStore keystore,
final String keystorePassword,
final KeyStore truststore,
final SecureRandom random,
final X509HostnameVerifier hostnameVerifier)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(createSSLContext(
algorithm, keystore, keystorePassword, truststore, random, null),
hostnameVerifier);
}
/**
* @since 4.1
*/
public SSLSocketFactory(
String algorithm,
final KeyStore keystore,
final String keystorePassword,
final KeyStore truststore,
final SecureRandom random,
final TrustStrategy trustStrategy,
final X509HostnameVerifier hostnameVerifier)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(createSSLContext(
algorithm, keystore, keystorePassword, truststore, random, trustStrategy),
hostnameVerifier);
}
public SSLSocketFactory(
final KeyStore keystore,
final String keystorePassword,
final KeyStore truststore)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(TLS, keystore, keystorePassword, truststore, null, null, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
public SSLSocketFactory(
final KeyStore keystore,
final String keystorePassword)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException{
this(TLS, keystore, keystorePassword, null, null, null, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
public SSLSocketFactory(
final KeyStore truststore)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(TLS, null, null, truststore, null, null, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
/**
* @since 4.1
*/
public SSLSocketFactory(
final TrustStrategy trustStrategy,
final X509HostnameVerifier hostnameVerifier)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(TLS, null, null, null, null, trustStrategy, hostnameVerifier);
}
/**
* @since 4.1
*/
public SSLSocketFactory(
final TrustStrategy trustStrategy)
throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
this(TLS, null, null, null, null, trustStrategy, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
public SSLSocketFactory(final SSLContext sslContext) {
this(sslContext, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
/**
* @deprecated Use {@link #SSLSocketFactory(SSLContext)}
*/
@Deprecated
public SSLSocketFactory(
final SSLContext sslContext, final HostNameResolver nameResolver) {
super();
this.socketfactory = sslContext.getSocketFactory();
this.hostnameVerifier = BROWSER_COMPATIBLE_HOSTNAME_VERIFIER;
this.nameResolver = nameResolver;
}
/**
* @since 4.1
*/
public SSLSocketFactory(
final SSLContext sslContext, final X509HostnameVerifier hostnameVerifier) {
super();
this.socketfactory = sslContext.getSocketFactory();
this.hostnameVerifier = hostnameVerifier;
this.nameResolver = null;
}
private SSLSocketFactory() {
this(createDefaultSSLContext());
}
/**
* @param params Optional parameters. Parameters passed to this method will have no effect.
* This method will create a unconnected instance of {@link Socket} class.
* @since 4.1
*/
public Socket createSocket(final HttpParams params) throws IOException {
return this.socketfactory.createSocket();
}
@Deprecated
public Socket createSocket() throws IOException {
return this.socketfactory.createSocket();
}
/**
* @since 4.1
*/
public Socket connectSocket(
final Socket socket,
final InetSocketAddress remoteAddress,
final InetSocketAddress localAddress,
final HttpParams params) throws IOException, UnknownHostException, ConnectTimeoutException {
if (remoteAddress == null) {
throw new IllegalArgumentException("Remote address may not be null");
}
if (params == null) {
throw new IllegalArgumentException("HTTP parameters may not be null");
}
Socket sock = socket != null ? socket : new Socket();
if (localAddress != null) {
sock.setReuseAddress(HttpConnectionParams.getSoReuseaddr(params));
sock.bind(localAddress);
}
int connTimeout = HttpConnectionParams.getConnectionTimeout(params);
int soTimeout = HttpConnectionParams.getSoTimeout(params);
try {
sock.setSoTimeout(soTimeout);
sock.connect(remoteAddress, connTimeout);
} catch (SocketTimeoutException ex) {
throw new ConnectTimeoutException("Connect to " + remoteAddress.getHostName() + "/"
+ remoteAddress.getAddress() + " timed out");
}
SSLSocket sslsock;
// Setup SSL layering if necessary
if (sock instanceof SSLSocket) {
sslsock = (SSLSocket) sock;
} else {
sslsock = (SSLSocket) this.socketfactory.createSocket(
sock, remoteAddress.getHostName(), remoteAddress.getPort(), true);
}
if (this.hostnameVerifier != null) {
try {
this.hostnameVerifier.verify(remoteAddress.getHostName(), sslsock);
// verifyHostName() didn't blowup - good!
} catch (IOException iox) {
// close the socket before re-throwing the exception
try { sslsock.close(); } catch (Exception x) { /*ignore*/ }
throw iox;
}
}
return sslsock;
}
/**
* Checks whether a socket connection is secure.
* This factory creates TLS/SSL socket connections
* which, by default, are considered secure.
* <br/>
* Derived classes may override this method to perform
* runtime checks, for example based on the cypher suite.
*
* @param sock the connected socket
*
* @return <code>true</code>
*
* @throws IllegalArgumentException if the argument is invalid
*/
public boolean isSecure(final Socket sock) throws IllegalArgumentException {
if (sock == null) {
throw new IllegalArgumentException("Socket may not be null");
}
// This instanceof check is in line with createSocket() above.
if (!(sock instanceof SSLSocket)) {
throw new IllegalArgumentException("Socket not created by this factory");
}
// This check is performed last since it calls the argument object.
if (sock.isClosed()) {
throw new IllegalArgumentException("Socket is closed");
}
return true;
}
/**
* @since 4.1
*/
public Socket createLayeredSocket(
final Socket socket,
final String host,
final int port,
final boolean autoClose) throws IOException, UnknownHostException {
SSLSocket sslSocket = (SSLSocket) this.socketfactory.createSocket(
socket,
host,
port,
autoClose
);
if (this.hostnameVerifier != null) {
this.hostnameVerifier.verify(host, sslSocket);
}
// verifyHostName() didn't blowup - good!
return sslSocket;
}
@Deprecated
public void setHostnameVerifier(X509HostnameVerifier hostnameVerifier) {
if ( hostnameVerifier == null ) {
throw new IllegalArgumentException("Hostname verifier may not be null");
}
this.hostnameVerifier = hostnameVerifier;
}
public X509HostnameVerifier getHostnameVerifier() {
return this.hostnameVerifier;
}
/**
* @deprecated Use {@link #connectSocket(Socket, InetSocketAddress, InetSocketAddress, HttpParams)}
*/
@Deprecated
public Socket connectSocket(
final Socket socket,
final String host, int port,
final InetAddress localAddress, int localPort,
final HttpParams params) throws IOException, UnknownHostException, ConnectTimeoutException {
InetSocketAddress local = null;
if (localAddress != null || localPort > 0) {
// we need to bind explicitly
if (localPort < 0) {
localPort = 0; // indicates "any"
}
local = new InetSocketAddress(localAddress, localPort);
}
InetAddress remoteAddress;
if (this.nameResolver != null) {
remoteAddress = this.nameResolver.resolve(host);
} else {
remoteAddress = InetAddress.getByName(host);
}
InetSocketAddress remote = new InetSocketAddress(remoteAddress, port);
return connectSocket(socket, remote, local, params);
}
/**
* @deprecated Use {@link #createLayeredSocket(Socket, String, int, boolean)}
*/
@Deprecated
public Socket createSocket(
final Socket socket,
final String host, int port,
boolean autoClose) throws IOException, UnknownHostException {
return createLayeredSocket(socket, host, port, autoClose);
}
}