How to test SunJSSE Provider Classes?

SunJSSE Provider Classes are hidden in some library files in JDK 9 and newer releases. They were stored in jsse.jar JDK 8 and older releases.

The following sample program, SunJsseClassTest.java, shows you how to test SunJSSE Provider Classes:

// Copyright (c) FYIcenter.com
import java.net.*;
import java.io.*;
import javax.net.ssl.*;

public class SunJsseClassTest {
  public static void main(String[] args) throws Exception {
    System.out.println("JSSE provider name specified in ssl.ServerSocketFactory.provider:");
    String provider = System.getProperty("ssl.ServerSocketFactory.provider");
    System.out.println("   "+provider);

    System.out.println("Class names of default JSSE provider:");
    SSLServerSocketFactory factory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
    SSLServerSocket socket = (SSLServerSocket)factory.createServerSocket(1443);
    System.out.println("   "+factory.getClass().getName());
    System.out.println("   "+socket.getClass().getName());
    socket.close();

    System.out.println("Class names of SunJSSE provider:");
    SSLContext context = SSLContext.getInstance("SSL", "SunJSSE");
    context.init(null, null, null);
    factory = context.getServerSocketFactory();
    socket = (SSLServerSocket)factory.createServerSocket(1443);
    System.out.println("   "+factory.getClass().getName());
    System.out.println("   "+socket.getClass().getName());
    socket.close();
  }
}

Run the above program, you will see:

fyicenter> java SunJsseClassTest.java

JSSE provider name specified in ssl.ServerSocketFactory.provider:
   null

Class names of default JSSE provider:
   sun.security.ssl.SSLServerSocketFactoryImpl
   sun.security.ssl.SSLServerSocketImpl

Class names of SunJSSE provider:
   sun.security.ssl.SSLServerSocketFactoryImpl
   sun.security.ssl.SSLServerSocketImpl

The output confirms that SunJSSE classes are available. And they are used as the default provider for SSL protocol.

⇒ Downloading jsse.jar (JDK 8) Java Secure Socket Extension

⇐ Where jsse.jar in JDK

⇑ Downloading jsse.jar - Java Secure Socket Extension

⇑⇑ FAQ for jsse.jar - Java Secure Socket Extension