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Add deprecated cipher suites to our SSLSocket 

b/18001842
In the L platform, some cipher suites are disabled by
default. Unfortunately, some of these are still in use
by common email providers. We need them to be enabled
for email to work with these providers.

Change-Id: Ia3a9bab5467c26626db9259074f77ec476610fa5
This commit is contained in:
Martin Hibdon 2014-10-17 10:25:52 -07:00
parent d7192f0213
commit 4ecd51a794
2 changed files with 285 additions and 37 deletions
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258
emailcommon/src/com/android/emailcommon/utility/SSLSocketFactoryWrapper.java Normal file
View File

@ -0,0 +1,258 @@
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed 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 com.android.emailcommon.utility;
import com.android.mail.utils.LogUtils;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.net.ssl.*;
import javax.net.ssl.SSLSocketFactory;
public class SSLSocketFactoryWrapper extends javax.net.ssl.SSLSocketFactory {
private final SSLSocketFactory mFactory;
private final boolean mSecure;
private final int mHandshakeTimeout;
private final String[] mDefaultCipherSuites;
private final String[] DEPRECATED_CIPHER_SUITES_TO_ENABLE = new String[] {
"TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
"SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA",
"SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA",
"SSL_RSA_WITH_3DES_EDE_CBC_SHA",
"SSL_RSA_WITH_RC4_128_MD5",
"TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA",
"TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA",
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA",
"TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDH_RSA_WITH_AES_128_CBC_SHA",
"TLS_ECDH_RSA_WITH_AES_256_CBC_SHA",
"TLS_ECDH_RSA_WITH_RC4_128_SHA",
"SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA",
"SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA",
"SSL_RSA_EXPORT_WITH_DES40_CBC_SHA",
"SSL_RSA_EXPORT_WITH_RC4_40_MD5",
"SSL_DHE_DSS_WITH_DES_CBC_SHA",
"SSL_DHE_RSA_WITH_DES_CBC_SHA",
"SSL_RSA_WITH_DES_CBC_SHA"
};
SSLSocketFactoryWrapper(final SSLSocketFactory factory, final boolean secure,
int handshakeTimeout) {
mFactory = factory;
mSecure = secure;
mHandshakeTimeout = handshakeTimeout;
// Find the base factory's list of defaultCipherSuites, and merge our extras with it.
// Remember that the order is important. We'll add our extras at the end, and only
// if they weren't already in the base factory's list.
final String[] baseDefaultCipherSuites = mFactory.getDefaultCipherSuites();
final List<String> fullCipherSuiteList = new ArrayList<String>(Arrays.asList(
mFactory.getDefaultCipherSuites()));
final Set<String> baseDefaultCipherSuiteSet = new HashSet<String>(fullCipherSuiteList);
final String[] baseSupportedCipherSuites = mFactory.getSupportedCipherSuites();
final Set<String> baseSupportedCipherSuiteSet = new HashSet<String>(Arrays.asList(
mFactory.getSupportedCipherSuites()));
for (String cipherSuite : DEPRECATED_CIPHER_SUITES_TO_ENABLE) {
if (baseSupportedCipherSuiteSet.contains(cipherSuite) &&
!baseDefaultCipherSuiteSet.contains(cipherSuite)) {
fullCipherSuiteList.add(cipherSuite);
}
}
mDefaultCipherSuites = new String[fullCipherSuiteList.size()];
fullCipherSuiteList.toArray(mDefaultCipherSuites);
}
public static SSLSocketFactory getDefault(final KeyManager[] keyManagers, int handshakeTimeout)
throws NoSuchAlgorithmException, KeyManagementException{
final SSLContext context = SSLContext.getInstance("TLS");
context.init(keyManagers, null, null);
return new SSLSocketFactoryWrapper(context.getSocketFactory(), true, handshakeTimeout);
}
public static SSLSocketFactory getInsecure(final KeyManager[] keyManagers,
final TrustManager[] trustManagers,
int handshakeTimeout)
throws NoSuchAlgorithmException, KeyManagementException {
final SSLContext context = SSLContext.getInstance("TLS");
context.init(keyManagers, trustManagers, null);
return new SSLSocketFactoryWrapper(context.getSocketFactory(), false, handshakeTimeout);
}
public Socket createSocket()throws IOException {
return mFactory.createSocket();
}
public Socket createSocket(final Socket socket, final String host, final int port,
final boolean autoClose) throws IOException {
final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(socket, host, port, autoClose);
setHandshakeTimeout(sslSocket, mHandshakeTimeout);
sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
if (mSecure) {
verifyHostname(sslSocket, host);
}
return sslSocket;
}
@Override
public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(host, port);
setHandshakeTimeout(sslSocket, mHandshakeTimeout);
sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
if (mSecure) {
verifyHostname(sslSocket, host);
}
return sslSocket;
}
@Override
public Socket createSocket(String host, int i, InetAddress inetAddress, int i2) throws
IOException, UnknownHostException {
final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(host, i, inetAddress, i2);
setHandshakeTimeout(sslSocket, mHandshakeTimeout);
sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
if (mSecure) {
verifyHostname(sslSocket, host);
}
return sslSocket;
}
@Override
public Socket createSocket(InetAddress inetAddress, int i) throws IOException {
final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(inetAddress, i);
setHandshakeTimeout(sslSocket, mHandshakeTimeout);
sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
return sslSocket;
}
@Override
public Socket createSocket(InetAddress inetAddress, int i, InetAddress inetAddress2, int i2)
throws IOException {
final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(inetAddress, i, inetAddress2,
i2);
setHandshakeTimeout(sslSocket, mHandshakeTimeout);
sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
return sslSocket;
}
public String[] getDefaultCipherSuites() {
return mDefaultCipherSuites.clone();
}
public String[] getSupportedCipherSuites() {
return mFactory.getSupportedCipherSuites();
}
/**
* Attempt to set the hostname of the socket.
* @param sslSocket The SSLSocket
* @param hostname the hostname
* @return true if able to set the hostname, false if not.
*/
public static boolean potentiallyEnableSni(SSLSocket sslSocket, String hostname) {
try {
// Many implementations of SSLSocket support setHostname, although it is not part of
// the class definition. We will attempt to setHostname using reflection. If the
// particular SSLSocket implementation we are using does not support this meethod,
// we'll fail and return false.
sslSocket.getClass().getMethod("setHostname", String.class).invoke(sslSocket, hostname);
return true;
} catch (Exception ignored) {
return false;
}
}
/**
* Attempt to enable session tickets.
* @param sslSocket the SSLSocket.
* @return true if able to enable session tickets, false otherwise.
*/
public static boolean potentiallyEnableSessionTickets(SSLSocket sslSocket) {
try {
// Many implementations of SSLSocket support setUseSessionTickets, although it is not
// part of the class definition. We will attempt to setHostname using reflection. If the
// particular SSLSocket implementation we are using does not support this meethod,
// we'll fail and return false.
sslSocket.getClass().getMethod("setUseSessionTickets", boolean.class)
.invoke(sslSocket, true);
return true;
} catch (Exception e) {
return false;
}
}
/**
* Verify the hostname of the certificate used by the other end of a
* connected socket. You MUST call this if you did not supply a hostname
* to {@link #createSocket()}. It is harmless to call this method
* redundantly if the hostname has already been verified.
*
* @param socket An SSL socket which has been connected to a server
* @param hostname The expected hostname of the remote server
* @throws IOException if something goes wrong handshaking with the server
* @throws SSLPeerUnverifiedException if the server cannot prove its identity
*
* @hide
*/
public static void verifyHostname(Socket socket, String hostname) throws IOException {
if (!(socket instanceof SSLSocket)) {
throw new IllegalArgumentException("Attempt to verify non-SSL socket");
}
// The code at the start of OpenSSLSocketImpl.startHandshake()
// ensures that the call is idempotent, so we can safely call it.
SSLSocket ssl = (SSLSocket) socket;
ssl.startHandshake();
SSLSession session = ssl.getSession();
LogUtils.d(LogUtils.TAG, "using cipherSuite %s", session.getCipherSuite());
if (session == null) {
throw new SSLException("Cannot verify SSL socket without session");
}
if (!HttpsURLConnection.getDefaultHostnameVerifier().verify(hostname, session)) {
throw new SSLPeerUnverifiedException("Cannot verify hostname: " + hostname);
}
}
private void setHandshakeTimeout(SSLSocket sslSocket, int timeout) {
try {
// Most implementations of SSLSocket support setHandshakeTimeout(), but it is not
// actually part of the class definition. We will attempt to set it using reflection.
// If the particular implementation of SSLSocket we are using does not support this
// function, then we will just have to use the default handshake timeout.
sslSocket.getClass().getMethod("setHandshakeTimeout", int.class).invoke(sslSocket,
timeout);
} catch (Exception e) {
LogUtils.w(LogUtils.TAG, e, "unable to set handshake timeout");
}
}
}

64
emailcommon/src/com/android/emailcommon/utility/SSLUtils.java
View File

@ -20,8 +20,6 @@ import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.SSLCertificateSocketFactory;
import android.net.SSLSessionCache;
import android.security.KeyChain;
import android.security.KeyChainException;
@ -34,6 +32,8 @@ import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.PublicKey;
@ -159,43 +159,33 @@ public class SSLUtils {
public synchronized static javax.net.ssl.SSLSocketFactory getSSLSocketFactory(
final Context context, final HostAuth hostAuth, final KeyManager keyManager,
final boolean insecure) {
if (insecure) {
final SSLCertificateSocketFactory insecureFactory = (SSLCertificateSocketFactory)
SSLCertificateSocketFactory.getInsecure(SSL_HANDSHAKE_TIMEOUT, null);
insecureFactory.setTrustManagers(
new TrustManager[] {
new SameCertificateCheckingTrustManager(context, hostAuth)});
if (keyManager != null) {
insecureFactory.setKeyManagers(new KeyManager[] { keyManager });
try {
final KeyManager[] keyManagers = (keyManager == null ? null :
new KeyManager[]{keyManager});
if (insecure) {
final TrustManager[] trustManagers = new TrustManager[]{
new SameCertificateCheckingTrustManager(context, hostAuth)};
SSLSocketFactoryWrapper insecureFactory =
(SSLSocketFactoryWrapper) SSLSocketFactoryWrapper.getInsecure(
keyManagers, trustManagers, SSL_HANDSHAKE_TIMEOUT);
return insecureFactory;
} else {
if (sSecureFactory == null) {
SSLSocketFactoryWrapper secureFactory =
(SSLSocketFactoryWrapper) SSLSocketFactoryWrapper.getDefault(
keyManagers, SSL_HANDSHAKE_TIMEOUT);
sSecureFactory = secureFactory;
}
return sSecureFactory;
}
return insecureFactory;
} else {
if (sSecureFactory == null) {
// First try to get use an externally supplied, more secure SSLSocketBuilder.
// If so we should use that.
javax.net.ssl.SSLSocketFactory socketFactory = null;
if (sExternalSocketFactoryBuilder != null) {
socketFactory = sExternalSocketFactoryBuilder.createSecureSocketFactory(
context, SSL_HANDSHAKE_TIMEOUT);
}
if (socketFactory != null) {
sSecureFactory = socketFactory;
LogUtils.d(TAG, "Using externally created CertificateSocketFactory");
return sSecureFactory;
}
// Only fall back to the platform one if that fails.
LogUtils.d(TAG, "Falling back to platform CertificateSocketFactory");
final SSLCertificateSocketFactory certificateSocketFactory =
(SSLCertificateSocketFactory)
SSLCertificateSocketFactory.getDefault(SSL_HANDSHAKE_TIMEOUT,
new SSLSessionCache(context));
if (keyManager != null) {
certificateSocketFactory.setKeyManagers(new KeyManager[] { keyManager });
}
sSecureFactory = certificateSocketFactory;
}
return sSecureFactory;
} catch (NoSuchAlgorithmException e) {
LogUtils.wtf(TAG, e, "Unable to acquire SSLSocketFactory");
// TODO: what can we do about this?
} catch (KeyManagementException e) {
LogUtils.wtf(TAG, e, "Unable to acquire SSLSocketFactory");
// TODO: what can we do about this?
}
return null;
}
/**