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/*
* ====================================================================
* 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
*
* 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.
*
* SSLSocketFactory will enable server authentication when supplied with
* a {@link java.security.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.
*
* Use JDK keytool utility to import a trusted certificate and generate a trust-store file:
*
* keytool -import -alias "my server cert" -file server.crt -keystore my.truststore
*
*
* In special cases the standard trust verification process can be bypassed by using a custom
* {@link org.apache.http.conn.ssl.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.
*
* SSLSocketFactory will enable client authentication when supplied with
* a {@link java.security.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.
*
* Use the following sequence of actions to generate a key-store file
*
*
* -
*
* Use JDK keytool utility to generate a new key
*
keytool -genkey -v -alias "my client key" -validity 365 -keystore my.keystore
* For simplicity use the same password for the key as that of the key-store
*
*
* -
*
* Issue a certificate signing request (CSR)
*
keytool -certreq -alias "my client key" -file mycertreq.csr -keystore my.keystore
*
*
* -
*
* 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.
*
*
* -
*
* Import the trusted CA root certificate
*
keytool -import -alias "my trusted ca" -file caroot.crt -keystore my.keystore
*
*
* -
*
* Import the PKCS#7 file containg the complete certificate chain
*
keytool -import -alias "my client key" -file mycert.p7 -keystore my.keystore
*
*
* -
*
* Verify the content the resultant keystore file
*
keytool -list -v -keystore my.keystore
*
*
*
*
* @since 4.0
*/
@ThreadSafe
public class SSLConnectionSocketFactory implements LayeredConnectionSocketFactory {
private final static String TAG = "HttpClient";
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 AllowAllHostnameVerifierHC4();
public static final X509HostnameVerifier BROWSER_COMPATIBLE_HOSTNAME_VERIFIER
= new BrowserCompatHostnameVerifierHC4();
public static final X509HostnameVerifier STRICT_HOSTNAME_VERIFIER
= new StrictHostnameVerifierHC4();
/**
* Obtains default SSL socket factory with an SSL context based on the standard JSSE
* trust material (cacerts file in the security properties directory).
* System properties are not taken into consideration.
*
* @return default SSL socket factory
*/
public static SSLConnectionSocketFactory getSocketFactory() throws SSLInitializationException {
return new SSLConnectionSocketFactory(
(javax.net.ssl.SSLSocketFactory) SSLSocketFactory.getDefault(),
BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
private static String[] split(final String s) {
if (TextUtils.isBlank(s)) {
return null;
}
return s.split(" *, *");
}
/**
* Obtains default SSL socket factory with an SSL context based on system properties
* as described in
*
* "JavaTM Secure Socket Extension (JSSE) Reference Guide for the JavaTM 2 Platform
* Standard Edition 5
*
* @return default system SSL socket factory
*/
public static SSLConnectionSocketFactory getSystemSocketFactory() throws SSLInitializationException {
return new SSLConnectionSocketFactory(
(javax.net.ssl.SSLSocketFactory) SSLSocketFactory.getDefault(),
split(System.getProperty("https.protocols")),
split(System.getProperty("https.cipherSuites")),
BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
private final javax.net.ssl.SSLSocketFactory socketfactory;
private final X509HostnameVerifier hostnameVerifier;
private final String[] supportedProtocols;
private final String[] supportedCipherSuites;
public SSLConnectionSocketFactory(final SSLContext sslContext) {
this(sslContext, BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
}
public SSLConnectionSocketFactory(
final SSLContext sslContext, final X509HostnameVerifier hostnameVerifier) {
this(Args.notNull(sslContext, "SSL context").getSocketFactory(),
null, null, hostnameVerifier);
}
public SSLConnectionSocketFactory(
final SSLContext sslContext,
final String[] supportedProtocols,
final String[] supportedCipherSuites,
final X509HostnameVerifier hostnameVerifier) {
this(Args.notNull(sslContext, "SSL context").getSocketFactory(),
supportedProtocols, supportedCipherSuites, hostnameVerifier);
}
public SSLConnectionSocketFactory(
final javax.net.ssl.SSLSocketFactory socketfactory,
final X509HostnameVerifier hostnameVerifier) {
this(socketfactory, null, null, hostnameVerifier);
}
public SSLConnectionSocketFactory(
final javax.net.ssl.SSLSocketFactory socketfactory,
final String[] supportedProtocols,
final String[] supportedCipherSuites,
final X509HostnameVerifier hostnameVerifier) {
this.socketfactory = Args.notNull(socketfactory, "SSL socket factory");
this.supportedProtocols = supportedProtocols;
this.supportedCipherSuites = supportedCipherSuites;
this.hostnameVerifier = hostnameVerifier != null ? hostnameVerifier : BROWSER_COMPATIBLE_HOSTNAME_VERIFIER;
}
/**
* Performs any custom initialization for a newly created SSLSocket
* (before the SSL handshake happens).
*
* The default implementation is a no-op, but could be overridden to, e.g.,
* call {@link javax.net.ssl.SSLSocket#setEnabledCipherSuites(String[])}.
*/
protected void prepareSocket(final SSLSocket socket) throws IOException {
}
public Socket createSocket(final HttpContext context) throws IOException {
return SocketFactory.getDefault().createSocket();
}
public Socket connectSocket(
final int connectTimeout,
final Socket socket,
final HttpHost host,
final InetSocketAddress remoteAddress,
final InetSocketAddress localAddress,
final HttpContext context) throws IOException {
Args.notNull(host, "HTTP host");
Args.notNull(remoteAddress, "Remote address");
final Socket sock = socket != null ? socket : createSocket(context);
if (localAddress != null) {
sock.bind(localAddress);
}
try {
if (connectTimeout > 0 && sock.getSoTimeout() == 0) {
sock.setSoTimeout(connectTimeout);
}
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Connecting socket to " + remoteAddress + " with timeout " + connectTimeout);
}
sock.connect(remoteAddress, connectTimeout);
} catch (final IOException ex) {
try {
sock.close();
} catch (final IOException ignore) {
}
throw ex;
}
// Setup SSL layering if necessary
if (sock instanceof SSLSocket) {
final SSLSocket sslsock = (SSLSocket) sock;
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Starting handshake");
}
sslsock.startHandshake();
verifyHostname(sslsock, host.getHostName());
return sock;
} else {
return createLayeredSocket(sock, host.getHostName(), remoteAddress.getPort(), context);
}
}
@TargetApi(17)
public Socket createLayeredSocket(
final Socket socket,
final String target,
final int port,
final HttpContext context) throws IOException {
final SSLSocket sslsock = (SSLSocket) this.socketfactory.createSocket(
socket,
target,
port,
true);
if (supportedProtocols != null) {
sslsock.setEnabledProtocols(supportedProtocols);
} else {
// If supported protocols are not explicitly set, remove all SSL protocol versions
final String[] allProtocols = sslsock.getEnabledProtocols();
final List enabledProtocols = new ArrayList(allProtocols.length);
for (String protocol: allProtocols) {
if (!protocol.startsWith("SSL")) {
enabledProtocols.add(protocol);
}
}
if (!enabledProtocols.isEmpty()) {
sslsock.setEnabledProtocols(enabledProtocols.toArray(new String[enabledProtocols.size()]));
}
}
if (supportedCipherSuites != null) {
sslsock.setEnabledCipherSuites(supportedCipherSuites);
}
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Enabled protocols: " + Arrays.asList(sslsock.getEnabledProtocols()));
Log.d(TAG, "Enabled cipher suites:" + Arrays.asList(sslsock.getEnabledCipherSuites()));
}
prepareSocket(sslsock);
// Android specific code to enable SNI
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Enabling SNI for " + target);
}
try {
Method method = sslsock.getClass().getMethod("setHostname", String.class);
method.invoke(sslsock, target);
} catch (Exception ex) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "SNI configuration failed", ex);
}
}
}
// End of Android specific code
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Starting handshake");
}
sslsock.startHandshake();
verifyHostname(sslsock, target);
return sslsock;
}
X509HostnameVerifier getHostnameVerifier() {
return this.hostnameVerifier;
}
private void verifyHostname(final SSLSocket sslsock, final String hostname) throws IOException {
try {
if (Log.isLoggable(TAG, Log.DEBUG)) {
try {
final SSLSession session = sslsock.getSession();
Log.d(TAG, "Secure session established");
Log.d(TAG, " negotiated protocol: " + session.getProtocol());
Log.d(TAG, " negotiated cipher suite: " + session.getCipherSuite());
final Certificate[] certs = session.getPeerCertificates();
final X509Certificate x509 = (X509Certificate) certs[0];
final X500Principal peer = x509.getSubjectX500Principal();
Log.d(TAG, " peer principal: " + peer.toString());
final Collection> altNames1 = x509.getSubjectAlternativeNames();
if (altNames1 != null) {
final List altNames = new ArrayList();
for (final List aC : altNames1) {
if (!aC.isEmpty()) {
altNames.add((String) aC.get(1));
}
}
Log.d(TAG, " peer alternative names: " + altNames);
}
final X500Principal issuer = x509.getIssuerX500Principal();
Log.d(TAG, " issuer principal: " + issuer.toString());
final Collection> altNames2 = x509.getIssuerAlternativeNames();
if (altNames2 != null) {
final List altNames = new ArrayList();
for (final List aC : altNames2) {
if (!aC.isEmpty()) {
altNames.add((String) aC.get(1));
}
}
Log.d(TAG, " issuer alternative names: " + altNames);
}
} catch (Exception ignore) {
}
}
this.hostnameVerifier.verify(hostname, sslsock);
// verifyHostName() didn't blowup - good!
} catch (final IOException iox) {
// close the socket before re-throwing the exception
try { sslsock.close(); } catch (final Exception x) { /*ignore*/ }
throw iox;
}
}
}