android - 在 HttpsURLConnection 中禁用 SSL 作为协议(protocol)

Question

由于 POODLE漏洞，我的服务器，托管在 Amazon AWS 中不再支持 SSLv3。

因此，我的 Android 应用对服务器进行的第一个 HTTPS 连接会在建立连接时导致错误。

Error reading server response: javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x77d8ab68: Failure in SSL library, usually a protocol error
error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure (external/openssl/ssl/s23_clnt.c:741 0x7339ad74:0x00000000)
       [....]
Caused by: javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x77d8ab68: Failure in SSL library, usually a protocol error
error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure (external/openssl/ssl/s23_clnt.c:741 0x7339ad74:0x00000000)
       at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:448)
       at com.android.okhttp.Connection.upgradeToTls(Connection.java:146)
       at com.android.okhttp.Connection.connect(Connection.java:107)
       at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:294)
       at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
       at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)

错误仅发生在第一个请求中。后续请求会工作一段时间。

为了解决这个问题，我尝试从 Android 客户端接受的协议(protocol)列表中删除 SSL，并确保我只使用 TLS。为此，我设置了一个自定义 SSLSocketFactory，它将 SSL 从启用的协议(protocol)和支持的密码套件列表中删除。

/**
 * SSLSocketFactory that wraps one existing SSLSocketFactory and delegetes into it adding
 * a new cipher suite
 */
public class TLSOnlySocketFactory extends SSLSocketFactory {

    private final SSLSocketFactory delegate;

    public TLSOnlySocketFactory(SSLSocketFactory delegate) {
        this.delegate = delegate;
    }

    @Override
    public String[] getDefaultCipherSuites() {

        return getPreferredDefaultCipherSuites(this.delegate);
    }

    @Override
    public String[] getSupportedCipherSuites() {
        return getPreferredSupportedCipherSuites(this.delegate);
    }



    @Override
    public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
        final Socket socket = this.delegate.createSocket(s, host, port, autoClose);

        ((SSLSocket)socket).setEnabledCipherSuites(getPreferredDefaultCipherSuites(delegate));
        ((SSLSocket)socket).setEnabledProtocols(getEnabledProtocols((SSLSocket)socket));

        return socket;
    }



   [.....]

        ((SSLSocket)socket).setEnabledCipherSuites(getPreferredDefaultCipherSuites(delegate));
        ((SSLSocket) socket).setEnabledProtocols(getEnabledProtocols((SSLSocket)socket));

        return socket;
    }

    @Override
    public Socket createSocket(InetAddress host, int port) throws IOException {
        final Socket socket = this.delegate.createSocket(host, port);

        ((SSLSocket)socket).setEnabledCipherSuites(getPreferredDefaultCipherSuites(delegate));
        ((SSLSocket) socket).setEnabledProtocols(getEnabledProtocols((SSLSocket)socket));

        return socket;
    }

    @Override
    public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
        final Socket socket = this.delegate.createSocket(address, port, localAddress, localPort);

        ((SSLSocket)socket).setEnabledCipherSuites(getPreferredDefaultCipherSuites(delegate));
        ((SSLSocket) socket).setEnabledProtocols(getEnabledProtocols((SSLSocket)socket));

        return socket;
    }

    private String[] getPreferredDefaultCipherSuites(SSLSocketFactory sslSocketFactory) {
        return getCipherSuites(sslSocketFactory.getDefaultCipherSuites());
    }

    private String[] getPreferredSupportedCipherSuites(SSLSocketFactory sslSocketFactory) {
        return getCipherSuites(sslSocketFactory.getSupportedCipherSuites());
    }

    private String[] getCipherSuites(String[] cipherSuites) {
        final ArrayList<String> suitesList = new ArrayList<String>(Arrays.asList(cipherSuites));
        final Iterator<String> iterator = suitesList.iterator();
        while (iterator.hasNext()) {
            final String cipherSuite = iterator.next();
            if (cipherSuite.contains("SSL")) {
                iterator.remove();
            }
        }
        return suitesList.toArray(new String[suitesList.size()]);
    }

    private String[] getEnabledProtocols(SSLSocket socket) {
        final ArrayList<String> protocolList = new ArrayList<String>(Arrays.asList(socket.getSupportedProtocols()));
        final Iterator<String> iterator = protocolList.iterator();
        while (iterator.hasNext()) {
            final String protocl = iterator.next();
            if (protocl.contains("SSL")) {
                iterator.remove();
            }
        }
        return protocolList.toArray(new String[protocolList.size()]);
     }

}

如您所见，我的 SSLSocketFactory 委托(delegate)给另一个 SSLSocketFactory，它所做的只是从启用的协议(protocol)列表中删除 SSL。

我将这家工厂建立为

final TLSOnlySocketFactory tlsOnlySocketFactory = new TLSOnlySocketFactory(HttpsURLConnection.getDefaultSSLSocketFactory());
HttpsURLConnection.setDefaultSSLSocketFactory(tlsOnlySocketFactory);

这并不能解决问题。有时，我仍然会在建立连接时看到错误。奇怪的是，这并不能解决问题，但它显然可以最大限度地减少问题的发生。

如何强制我的 Android 客户端中的 HttpsUrlConnection 仅使用 TLS？

谢谢。

Answer 1

我想我已经解决了这个问题。基本思想与问题中的代码相同(避免 SSLv3 作为唯一可用的协议(protocol))，但执行它的代码不同:

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.net.ssl.HandshakeCompletedListener;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;

    /**
     * {@link javax.net.ssl.SSLSocketFactory} that doesn't allow {@code SSLv3} only connections
     * <p>fixes https://github.com/koush/ion/issues/386</p>
     *
     * <p> see https://code.google.com/p/android/issues/detail?id=78187 </p>
     */
    public class NoSSLv3Factory extends SSLSocketFactory {
        private final SSLSocketFactory delegate;

        public NoSSLv3Factory() {
            this.delegate = HttpsURLConnection.getDefaultSSLSocketFactory();
        }

        @Override
        public String[] getDefaultCipherSuites() {
            return delegate.getDefaultCipherSuites();
        }

        @Override
        public String[] getSupportedCipherSuites() {
            return delegate.getSupportedCipherSuites();
        }

        private static Socket makeSocketSafe(Socket socket) {
            if (socket instanceof SSLSocket) {
                socket = new NoSSLv3SSLSocket((SSLSocket) socket);
            }
            return socket;
        }

        @Override
        public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
            return makeSocketSafe(delegate.createSocket(s, host, port, autoClose));
        }

        @Override
        public Socket createSocket(String host, int port) throws IOException {
            return makeSocketSafe(delegate.createSocket(host, port));
        }

        @Override
        public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
            return makeSocketSafe(delegate.createSocket(host, port, localHost, localPort));
        }

        @Override
        public Socket createSocket(InetAddress host, int port) throws IOException {
            return makeSocketSafe(delegate.createSocket(host, port));
        }

        @Override
        public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
            return makeSocketSafe(delegate.createSocket(address, port, localAddress, localPort));
        }

        /**
         * Created by robUx4 on 25/10/2014.
         */
        private static class DelegateSSLSocket extends SSLSocket {

            protected final SSLSocket delegate;

            DelegateSSLSocket(SSLSocket delegate) {
                this.delegate = delegate;
            }

            @Override
            public String[] getSupportedCipherSuites() {
                return delegate.getSupportedCipherSuites();
            }

            @Override
            public String[] getEnabledCipherSuites() {
                return delegate.getEnabledCipherSuites();
            }

            @Override
            public void setEnabledCipherSuites(String[] suites) {
                delegate.setEnabledCipherSuites(suites);
            }

            @Override
            public String[] getSupportedProtocols() {
                return delegate.getSupportedProtocols();
            }

            @Override
            public String[] getEnabledProtocols() {
                return delegate.getEnabledProtocols();
            }

            @Override
            public void setEnabledProtocols(String[] protocols) {
                delegate.setEnabledProtocols(protocols);
            }

            @Override
            public SSLSession getSession() {
                return delegate.getSession();
            }

            @Override
            public void addHandshakeCompletedListener(HandshakeCompletedListener listener) {
                delegate.addHandshakeCompletedListener(listener);
            }

            @Override
            public void removeHandshakeCompletedListener(HandshakeCompletedListener listener) {
                delegate.removeHandshakeCompletedListener(listener);
            }

            @Override
            public void startHandshake() throws IOException {
                delegate.startHandshake();
            }

            @Override
            public void setUseClientMode(boolean mode) {
                delegate.setUseClientMode(mode);
            }

            @Override
            public boolean getUseClientMode() {
                return delegate.getUseClientMode();
            }

            @Override
            public void setNeedClientAuth(boolean need) {
                delegate.setNeedClientAuth(need);
            }

            @Override
            public void setWantClientAuth(boolean want) {
                delegate.setWantClientAuth(want);
            }

            @Override
            public boolean getNeedClientAuth() {
                return delegate.getNeedClientAuth();
            }

            @Override
            public boolean getWantClientAuth() {
                return delegate.getWantClientAuth();
            }

            @Override
            public void setEnableSessionCreation(boolean flag) {
                delegate.setEnableSessionCreation(flag);
            }

            @Override
            public boolean getEnableSessionCreation() {
                return delegate.getEnableSessionCreation();
            }

            @Override
            public void bind(SocketAddress localAddr) throws IOException {
                delegate.bind(localAddr);
            }

            @Override
            public synchronized void close() throws IOException {
                delegate.close();
            }

            @Override
            public void connect(SocketAddress remoteAddr) throws IOException {
                delegate.connect(remoteAddr);
            }

            @Override
            public void connect(SocketAddress remoteAddr, int timeout) throws IOException {
                delegate.connect(remoteAddr, timeout);
            }

            @Override
            public SocketChannel getChannel() {
                return delegate.getChannel();
            }

            @Override
            public InetAddress getInetAddress() {
                return delegate.getInetAddress();
            }

            @Override
            public InputStream getInputStream() throws IOException {
                return delegate.getInputStream();
            }

            @Override
            public boolean getKeepAlive() throws SocketException {
                return delegate.getKeepAlive();
            }

            @Override
            public InetAddress getLocalAddress() {
                return delegate.getLocalAddress();
            }

            @Override
            public int getLocalPort() {
                return delegate.getLocalPort();
            }

            @Override
            public SocketAddress getLocalSocketAddress() {
                return delegate.getLocalSocketAddress();
            }

            @Override
            public boolean getOOBInline() throws SocketException {
                return delegate.getOOBInline();
            }

            @Override
            public OutputStream getOutputStream() throws IOException {
                return delegate.getOutputStream();
            }

            @Override
            public int getPort() {
                return delegate.getPort();
            }

            @Override
            public synchronized int getReceiveBufferSize() throws SocketException {
                return delegate.getReceiveBufferSize();
            }

            @Override
            public SocketAddress getRemoteSocketAddress() {
                return delegate.getRemoteSocketAddress();
            }

            @Override
            public boolean getReuseAddress() throws SocketException {
                return delegate.getReuseAddress();
            }

            @Override
            public synchronized int getSendBufferSize() throws SocketException {
                return delegate.getSendBufferSize();
            }

            @Override
            public int getSoLinger() throws SocketException {
                return delegate.getSoLinger();
            }

            @Override
            public synchronized int getSoTimeout() throws SocketException {
                return delegate.getSoTimeout();
            }

            @Override
            public boolean getTcpNoDelay() throws SocketException {
                return delegate.getTcpNoDelay();
            }

            @Override
            public int getTrafficClass() throws SocketException {
                return delegate.getTrafficClass();
            }

            @Override
            public boolean isBound() {
                return delegate.isBound();
            }

            @Override
            public boolean isClosed() {
                return delegate.isClosed();
            }

            @Override
            public boolean isConnected() {
                return delegate.isConnected();
            }

            @Override
            public boolean isInputShutdown() {
                return delegate.isInputShutdown();
            }

            @Override
            public boolean isOutputShutdown() {
                return delegate.isOutputShutdown();
            }

            @Override
            public void sendUrgentData(int value) throws IOException {
                delegate.sendUrgentData(value);
            }

            @Override
            public void setKeepAlive(boolean keepAlive) throws SocketException {
                delegate.setKeepAlive(keepAlive);
            }

            @Override
            public void setOOBInline(boolean oobinline) throws SocketException {
                delegate.setOOBInline(oobinline);
            }

            @Override
            public void setPerformancePreferences(int connectionTime, int latency, int bandwidth) {
                delegate.setPerformancePreferences(connectionTime, latency, bandwidth);
            }

            @Override
            public synchronized void setReceiveBufferSize(int size) throws SocketException {
                delegate.setReceiveBufferSize(size);
            }

            @Override
            public void setReuseAddress(boolean reuse) throws SocketException {
                delegate.setReuseAddress(reuse);
            }

            @Override
            public synchronized void setSendBufferSize(int size) throws SocketException {
                delegate.setSendBufferSize(size);
            }

            @Override
            public void setSoLinger(boolean on, int timeout) throws SocketException {
                delegate.setSoLinger(on, timeout);
            }

            @Override
            public synchronized void setSoTimeout(int timeout) throws SocketException {
                delegate.setSoTimeout(timeout);
            }

            @Override
            public void setSSLParameters(SSLParameters p) {
                delegate.setSSLParameters(p);
            }

            @Override
            public void setTcpNoDelay(boolean on) throws SocketException {
                delegate.setTcpNoDelay(on);
            }

            @Override
            public void setTrafficClass(int value) throws SocketException {
                delegate.setTrafficClass(value);
            }

            @Override
            public void shutdownInput() throws IOException {
                delegate.shutdownInput();
            }

            @Override
            public void shutdownOutput() throws IOException {
                delegate.shutdownOutput();
            }

            @Override
            public String toString() {
                return delegate.toString();
            }

            @Override
            public boolean equals(Object o) {
                return delegate.equals(o);
            }
        }

        /**
         * An {@link javax.net.ssl.SSLSocket} that doesn't allow {@code SSLv3} only connections
         * <p>fixes https://github.com/koush/ion/issues/386</p>
         */
        private static class NoSSLv3SSLSocket extends DelegateSSLSocket {

            private NoSSLv3SSLSocket(SSLSocket delegate) {
                super(delegate);

                String canonicalName = delegate.getClass().getCanonicalName();
                if (!canonicalName.equals("org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl")) {
                    // try replicate the code from HttpConnection.setupSecureSocket()
                    try {
                        Method msetUseSessionTickets = delegate.getClass().getMethod("setUseSessionTickets", boolean.class);
                        if (null != msetUseSessionTickets) {
                            msetUseSessionTickets.invoke(delegate, true);
                        }
                    } catch (NoSuchMethodException ignored) {
                    } catch (InvocationTargetException ignored) {
                    } catch (IllegalAccessException ignored) {
                    }
                }
            }

            @Override
            public void setEnabledProtocols(String[] protocols) {
                if (protocols != null && protocols.length == 1 && "SSLv3".equals(protocols[0])) {
                    // no way jose
                    // see issue https://code.google.com/p/android/issues/detail?id=78187
                    List<String> enabledProtocols = new ArrayList<String>(Arrays.asList(delegate.getEnabledProtocols()));
                    if (enabledProtocols.size() > 1) {
                        enabledProtocols.remove("SSLv3");
                    }
                    protocols = enabledProtocols.toArray(new String[enabledProtocols.size()]);
                }
                super.setEnabledProtocols(protocols);
            }
        }

    }

在您的代码中的某处，在创建连接之前:

    static {
    HttpsURLConnection.setDefaultSSLSocketFactory(new NoSSLv3Factory());
}

此代码取自 https://code.google.com/p/android/issues/detail?id=78187 ，您可以在其中找到关于为什么在 Android 4.X 中发生这种情况的完整解释。

我已经在生产中使用了一个星期，并且似乎成功了。