259 lines
11 KiB
Java
259 lines
11 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.emailcommon.utility;
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import com.android.mail.utils.LogUtils;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.net.InetAddress;
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import java.net.Socket;
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import java.net.UnknownHostException;
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import java.security.KeyManagementException;
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import java.security.NoSuchAlgorithmException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import javax.net.ssl.*;
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import javax.net.ssl.SSLSocketFactory;
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public class SSLSocketFactoryWrapper extends javax.net.ssl.SSLSocketFactory {
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private final SSLSocketFactory mFactory;
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private final boolean mSecure;
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private final int mHandshakeTimeout;
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private final String[] mDefaultCipherSuites;
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private final String[] DEPRECATED_CIPHER_SUITES_TO_ENABLE = new String[] {
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"TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA",
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"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
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"SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA",
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"SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA",
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"SSL_RSA_WITH_3DES_EDE_CBC_SHA",
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"SSL_RSA_WITH_RC4_128_MD5",
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"TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA",
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"TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA",
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"TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA",
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"TLS_ECDH_ECDSA_WITH_RC4_128_SHA",
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"TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA",
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"TLS_ECDH_RSA_WITH_AES_128_CBC_SHA",
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"TLS_ECDH_RSA_WITH_AES_256_CBC_SHA",
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"TLS_ECDH_RSA_WITH_RC4_128_SHA",
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"SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA",
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"SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA",
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"SSL_RSA_EXPORT_WITH_DES40_CBC_SHA",
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"SSL_RSA_EXPORT_WITH_RC4_40_MD5",
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"SSL_DHE_DSS_WITH_DES_CBC_SHA",
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"SSL_DHE_RSA_WITH_DES_CBC_SHA",
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"SSL_RSA_WITH_DES_CBC_SHA"
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};
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SSLSocketFactoryWrapper(final SSLSocketFactory factory, final boolean secure,
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int handshakeTimeout) {
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mFactory = factory;
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mSecure = secure;
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mHandshakeTimeout = handshakeTimeout;
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// Find the base factory's list of defaultCipherSuites, and merge our extras with it.
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// Remember that the order is important. We'll add our extras at the end, and only
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// if they weren't already in the base factory's list.
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final String[] baseDefaultCipherSuites = mFactory.getDefaultCipherSuites();
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final List<String> fullCipherSuiteList = new ArrayList<String>(Arrays.asList(
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mFactory.getDefaultCipherSuites()));
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final Set<String> baseDefaultCipherSuiteSet = new HashSet<String>(fullCipherSuiteList);
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final String[] baseSupportedCipherSuites = mFactory.getSupportedCipherSuites();
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final Set<String> baseSupportedCipherSuiteSet = new HashSet<String>(Arrays.asList(
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mFactory.getSupportedCipherSuites()));
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for (String cipherSuite : DEPRECATED_CIPHER_SUITES_TO_ENABLE) {
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if (baseSupportedCipherSuiteSet.contains(cipherSuite) &&
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!baseDefaultCipherSuiteSet.contains(cipherSuite)) {
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fullCipherSuiteList.add(cipherSuite);
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}
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}
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mDefaultCipherSuites = new String[fullCipherSuiteList.size()];
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fullCipherSuiteList.toArray(mDefaultCipherSuites);
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}
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public static SSLSocketFactory getDefault(final KeyManager[] keyManagers, int handshakeTimeout)
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throws NoSuchAlgorithmException, KeyManagementException{
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final SSLContext context = SSLContext.getInstance("TLS");
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context.init(keyManagers, null, null);
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return new SSLSocketFactoryWrapper(context.getSocketFactory(), true, handshakeTimeout);
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}
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public static SSLSocketFactory getInsecure(final KeyManager[] keyManagers,
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final TrustManager[] trustManagers,
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int handshakeTimeout)
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throws NoSuchAlgorithmException, KeyManagementException {
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final SSLContext context = SSLContext.getInstance("TLS");
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context.init(keyManagers, trustManagers, null);
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return new SSLSocketFactoryWrapper(context.getSocketFactory(), false, handshakeTimeout);
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}
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public Socket createSocket()throws IOException {
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return mFactory.createSocket();
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}
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public Socket createSocket(final Socket socket, final String host, final int port,
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final boolean autoClose) throws IOException {
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final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(socket, host, port, autoClose);
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setHandshakeTimeout(sslSocket, mHandshakeTimeout);
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sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
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if (mSecure) {
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verifyHostname(sslSocket, host);
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}
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return sslSocket;
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}
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@Override
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public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
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final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(host, port);
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setHandshakeTimeout(sslSocket, mHandshakeTimeout);
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sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
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if (mSecure) {
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verifyHostname(sslSocket, host);
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}
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return sslSocket;
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}
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@Override
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public Socket createSocket(String host, int i, InetAddress inetAddress, int i2) throws
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IOException, UnknownHostException {
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final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(host, i, inetAddress, i2);
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setHandshakeTimeout(sslSocket, mHandshakeTimeout);
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sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
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if (mSecure) {
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verifyHostname(sslSocket, host);
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}
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return sslSocket;
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}
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@Override
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public Socket createSocket(InetAddress inetAddress, int i) throws IOException {
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final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(inetAddress, i);
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setHandshakeTimeout(sslSocket, mHandshakeTimeout);
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sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
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return sslSocket;
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}
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@Override
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public Socket createSocket(InetAddress inetAddress, int i, InetAddress inetAddress2, int i2)
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throws IOException {
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final SSLSocket sslSocket = (SSLSocket)mFactory.createSocket(inetAddress, i, inetAddress2,
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i2);
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setHandshakeTimeout(sslSocket, mHandshakeTimeout);
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sslSocket.setEnabledCipherSuites(mDefaultCipherSuites);
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return sslSocket;
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}
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public String[] getDefaultCipherSuites() {
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return mDefaultCipherSuites.clone();
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}
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public String[] getSupportedCipherSuites() {
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return mFactory.getSupportedCipherSuites();
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}
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/**
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* Attempt to set the hostname of the socket.
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* @param sslSocket The SSLSocket
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* @param hostname the hostname
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* @return true if able to set the hostname, false if not.
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*/
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public static boolean potentiallyEnableSni(SSLSocket sslSocket, String hostname) {
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try {
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// Many implementations of SSLSocket support setHostname, although it is not part of
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// the class definition. We will attempt to setHostname using reflection. If the
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// particular SSLSocket implementation we are using does not support this meethod,
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// we'll fail and return false.
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sslSocket.getClass().getMethod("setHostname", String.class).invoke(sslSocket, hostname);
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return true;
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} catch (Exception ignored) {
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return false;
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}
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}
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/**
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* Attempt to enable session tickets.
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* @param sslSocket the SSLSocket.
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* @return true if able to enable session tickets, false otherwise.
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*/
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public static boolean potentiallyEnableSessionTickets(SSLSocket sslSocket) {
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try {
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// Many implementations of SSLSocket support setUseSessionTickets, although it is not
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// part of the class definition. We will attempt to setHostname using reflection. If the
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// particular SSLSocket implementation we are using does not support this meethod,
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// we'll fail and return false.
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sslSocket.getClass().getMethod("setUseSessionTickets", boolean.class)
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.invoke(sslSocket, true);
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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/**
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* Verify the hostname of the certificate used by the other end of a
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* connected socket. You MUST call this if you did not supply a hostname
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* to {@link #createSocket()}. It is harmless to call this method
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* redundantly if the hostname has already been verified.
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*
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* @param socket An SSL socket which has been connected to a server
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* @param hostname The expected hostname of the remote server
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* @throws IOException if something goes wrong handshaking with the server
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* @throws SSLPeerUnverifiedException if the server cannot prove its identity
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*
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* @hide
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*/
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public static void verifyHostname(Socket socket, String hostname) throws IOException {
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if (!(socket instanceof SSLSocket)) {
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throw new IllegalArgumentException("Attempt to verify non-SSL socket");
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}
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// The code at the start of OpenSSLSocketImpl.startHandshake()
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// ensures that the call is idempotent, so we can safely call it.
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SSLSocket ssl = (SSLSocket) socket;
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ssl.startHandshake();
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SSLSession session = ssl.getSession();
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if (session == null) {
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throw new SSLException("Cannot verify SSL socket without session");
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}
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LogUtils.d(LogUtils.TAG, "using cipherSuite %s", session.getCipherSuite());
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if (!HttpsURLConnection.getDefaultHostnameVerifier().verify(hostname, session)) {
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throw new SSLPeerUnverifiedException("Cannot verify hostname: " + hostname);
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}
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}
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private void setHandshakeTimeout(SSLSocket sslSocket, int timeout) {
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try {
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// Most implementations of SSLSocket support setHandshakeTimeout(), but it is not
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// actually part of the class definition. We will attempt to set it using reflection.
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// If the particular implementation of SSLSocket we are using does not support this
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// function, then we will just have to use the default handshake timeout.
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sslSocket.getClass().getMethod("setHandshakeTimeout", int.class).invoke(sslSocket,
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timeout);
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} catch (Exception e) {
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LogUtils.w(LogUtils.TAG, e, "unable to set handshake timeout");
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}
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}
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}
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