michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.sync.net;
michael@0: 
michael@0: import java.io.IOException;
michael@0: import java.net.Socket;
michael@0: 
michael@0: import javax.net.ssl.SSLContext;
michael@0: import javax.net.ssl.SSLSocket;
michael@0: 
michael@0: import org.mozilla.gecko.background.common.log.Logger;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.conn.ssl.SSLSocketFactory;
michael@0: import ch.boye.httpclientandroidlib.params.HttpParams;
michael@0: 
michael@0: public class TLSSocketFactory extends SSLSocketFactory {
michael@0:   private static final String LOG_TAG = "TLSSocketFactory";
michael@0:   private static final String[] DEFAULT_CIPHER_SUITES = new String[] {
michael@0:     "TLS_DHE_RSA_WITH_AES_256_CBC_SHA",
michael@0:     "TLS_DHE_RSA_WITH_AES_128_CBC_SHA",
michael@0:     "SSL_RSA_WITH_RC4_128_SHA", // "RC4_SHA"
michael@0:   };
michael@0:   private static final String[] DEFAULT_PROTOCOLS = new String[] {
michael@0:     "SSLv3",
michael@0:     "TLSv1"
michael@0:   };
michael@0: 
michael@0:   // Guarded by `this`.
michael@0:   private static String[] cipherSuites = DEFAULT_CIPHER_SUITES;
michael@0: 
michael@0:   public TLSSocketFactory(SSLContext sslContext) {
michael@0:     super(sslContext);
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Attempt to specify the cipher suites to use for a connection. If
michael@0:    * setting fails (as it will on Android 2.2, because the wrong names
michael@0:    * are in use to specify ciphers), attempt to set the defaults.
michael@0:    *
michael@0:    * We store the list of cipher suites in `cipherSuites`, which
michael@0:    * avoids this fallback handling having to be executed more than once.
michael@0:    *
michael@0:    * This method is synchronized to ensure correct use of that member.
michael@0:    *
michael@0:    * See Bug 717691 for more details.
michael@0:    *
michael@0:    * @param socket
michael@0:    *        The SSLSocket on which to operate.
michael@0:    */
michael@0:   public static synchronized void setEnabledCipherSuites(SSLSocket socket) {
michael@0:     try {
michael@0:       socket.setEnabledCipherSuites(cipherSuites);
michael@0:     } catch (IllegalArgumentException e) {
michael@0:       cipherSuites = socket.getSupportedCipherSuites();
michael@0:       Logger.warn(LOG_TAG, "Setting enabled cipher suites failed: " + e.getMessage());
michael@0:       Logger.warn(LOG_TAG, "Using " + cipherSuites.length + " supported suites.");
michael@0:       socket.setEnabledCipherSuites(cipherSuites);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   @Override
michael@0:   public Socket createSocket(HttpParams params) throws IOException {
michael@0:     SSLSocket socket = (SSLSocket) super.createSocket(params);
michael@0:     socket.setEnabledProtocols(DEFAULT_PROTOCOLS);
michael@0:     setEnabledCipherSuites(socket);
michael@0:     return socket;
michael@0:   }
michael@0: }