Extended server_name (SNI Extension) not sent with jdk1.8.0 but send with jdk1.7.0

Question

I have implemented a JAX-WS client by using ApacheCXF (v3.0.4) and everything works successfully but the problem comes when I want to use a secure connection (SSL/TLS) with java 8 (jdk1.8.0_25).

I see the following exception in log (-Djavax.net.debug=all):

main, handling exception: java.net.SocketException: Connection reset
main, SEND TLSv1.2 ALERT:  fatal, description =    unexpected_message
main, WRITE: TLSv1.2 Alert, length = 2
main, Exception sending alert: java.net.SocketException: Connection reset by peer: socket write error

After a depeer analysis I have observed the problem is caused because the with Java 8 the server_name (SNI) is not sent but with Java 7 it is sent and the web service invocation works successfully.

Java 8 log (-Djavax.net.debug=all): Missing "Extension server_name"

[...]
Compression Methods:  { 0 }
Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1}
Extension ec_point_formats, formats: [uncompressed]
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA
***
[...]

Java 7 log (-Djavax.net.debug=all) (works): "Extension server_name" is set

[...]
Compression Methods:  { 0 }
Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1}
Extension ec_point_formats, formats: [uncompressed]
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA
Extension server_name, server_name: [host_name: testeo.hostname.es]
***
[...]

It is observed that with Java 7 the Extension server_name, server_name: [host_name: testeo.hostname.es] is set and then the web service invocation works successfully.

Why didn't Java 8 set the server_name as Java 7 did? Is it a Java configuration issue?

Answer 1

As mentioned, the cause is related to the JDK bug where using setHostnameVerifier() breaks SNI (Extension server_name). https://bugs.openjdk.java.net/browse/JDK-8144566

Our workaround: After testing we found that setting a connection's SSLSocketFactory to just about anything from the default seems to fix the issue.

This does not work: HttpsURLConnection.setSSLSocketFactory((SSLSocketFactory) SSLSocketFactory.getDefault());

This does work: HttpsURLConnection.setSSLSocketFactory(new SSLSocketFactoryFacade());

So, to fix it for a JAX-WS client, you could do something like this: bindingProvider.getRequestContext().put("com.sun.xml.internal.ws.transport.https.client.SSLSocketFactory", new SSLSocketFactoryFacade());

Our SSLSocketFactory facade: (Note that it really doesn't do anything)

public class SSLSocketFactoryFacade extends SSLSocketFactory {

    SSLSocketFactory sslsf;

    public SSLSocketFactoryFacade() {
        sslsf = (SSLSocketFactory) SSLSocketFactory.getDefault();;
    }

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

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

    @Override
    public Socket createSocket(Socket socket, String s, int i, boolean b) throws IOException {
        return sslsf.createSocket(socket, s, i, b);
    }

    @Override
    public Socket createSocket(String s, int i) throws IOException, UnknownHostException {
        return sslsf.createSocket(s, i);
    }

    @Override
    public Socket createSocket(String s, int i, InetAddress inetAddress, int i1) throws IOException, UnknownHostException {
        return sslsf.createSocket(s, i, inetAddress, i1);
    }

    @Override
    public Socket createSocket(InetAddress inetAddress, int i) throws IOException {
        return createSocket(inetAddress, i);
    }

    @Override
    public Socket createSocket(InetAddress inetAddress, int i, InetAddress inetAddress1, int i1) throws IOException {
        return createSocket(inetAddress, i, inetAddress1, i1);
    }
}

Answer 2

You, or the underlying libs (the WS lib does it) might be using setHostnameVerifier(..)

There is a bug in java8, where if setHostnameVerifier(..) is used the SNI is not done from the client side.

https://bugs.openjdk.java.net/browse/JDK-8072464

Answer 3

Please use JDK version 8u141 and above where this issue has been fixed. Please review the JDK 8u141 Bugs Fixes page for more details

Answer 4

First of all, this "server_name" stuff is associate with the SNI (Server Name Indication) extension. The Java 8 JSSE documentation talks about it here.

The documentation includes example code that shows how to set the server names that are sent. The code is for Java 8.

However, I can't figure out why (apparently) Java 7 is setting the server name by default, and Java 8 isn't. (The easy way to figure it out would be to use a debugger to figure out how the SSL engine object is created and initialized.)

Answer 5

I tried the solution provided by Benjamin Parry, but it did not work for me. After some digging around, I also found this solution which looks very similar, however the SSLSocketFactoryFacade manually inserts the correct SSL header instead of being a pure pass-though. Providing my final code below which is slightly different, but credit to be given to Girish Kamath at javabreaks for the basic idea:

    private static class SSLSocketFactoryFacade extends SSLSocketFactory {
    private SSLSocketFactory sslsf;
    private SSLParameters sslParameters;

    public SSLSocketFactoryFacade(String hostName) {
        sslParameters = new SSLParameters();
        sslParameters.setServerNames(Arrays.asList(new SNIHostName(hostName)));
        sslsf = (SSLSocketFactory) SSLSocketFactory.getDefault();;
    }

    public Socket createSocket() throws IOException {
        Socket socket = sslsf.createSocket();
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(InetAddress arg0, int arg1, InetAddress arg2, int arg3) throws IOException {
        Socket socket = sslsf.createSocket(arg0, arg1, arg2, arg3);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(InetAddress arg0, int arg1) throws IOException {
        Socket socket = sslsf.createSocket(arg0, arg1);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(Socket arg0, InputStream arg1, boolean arg2) throws IOException {
        Socket socket = sslsf.createSocket(arg0, arg1, arg2);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(Socket arg0, String arg1, int arg2, boolean arg3) throws IOException {
        Socket socket = sslsf.createSocket(arg0, arg1, arg2, arg3);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(String arg0, int arg1, InetAddress arg2, int arg3)
            throws IOException, UnknownHostException {
        Socket socket = sslsf.createSocket(arg0, arg1, arg2, arg3);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public Socket createSocket(String arg0, int arg1) throws IOException, UnknownHostException {
        Socket socket = sslsf.createSocket(arg0, arg1);
        ((SSLSocket) socket).setSSLParameters(sslParameters);
        return socket;
    }

    public String[] getDefaultCipherSuites() {
        return sslsf.getDefaultCipherSuites();
    }

    public String[] getSupportedCipherSuites() {
        return sslsf.getSupportedCipherSuites();
    }
}

And then I can call

sslConnection.setSSLSocketFactory(new SSLSocketFactoryFacade(sslConnection.getURL().getHost()));

where sslConnection is the HttpsURLConnection.