No cipher suites in common java sockets

Question

I have been using SSL sockets for a messaging system recently.

I finally started using a CA issued certificate. I imported it into my keystore, set the keystore property, and started up my client, but I keep getting handshake exceptions when I try to send data.

I enabled debug mode and I found that it is due to no cipher suites supported. Any thoughts on this?

If it helps, It also says that it is ignoring about 10 cipher suites from TLSV1 and TLSV1.1.

I also installed Unlimited Strength Cryptographic Policy.

Client code

public static void Message(String args){
    System.setProperty("https.protocols", "TLSv1");
    System.setProperty("javax.net.debug", "all");

    try
    {
        String host = "localhost";
        int port = 3498;
        InetAddress address = InetAddress.getByName(host);

        socket = (SSLSocket)SSLSocketFactory.getDefault().createSocket(address, port);

        //Send the message to the server
        OutputStream os = socket.getOutputStream();
        OutputStreamWriter osw = new OutputStreamWriter(os);
        BufferedWriter bw = new BufferedWriter(osw);

        String number = "Hello from the other side!";

        String sendMessage = number + "\n";
        bw.write(args);
        bw.flush();
        System.out.println("Message sent to the server : "+sendMessage);

        //Get the return message from the server

    }
    catch (Exception exception)
    {
        exception.printStackTrace();
    }
    finally
    {
        //Closing the socket
        try
        {
            socket.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

Server code

private void initListen() {
    System.setProperty("javax.net.ssl.keyStore", "/Users/181095/server.jks");
    try {


        SSLServerSocketFactory sf = (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();

        SSLServerSocket serverSocket = (SSLServerSocket)sf.createServerSocket(Ting.port);



        System.out.println("Server Started and listening to the port "
                + Ting.port);

        // Server is running always. This is done using this while(true)
        // loop
        while (true) {

            // Reading the message from the client
            socket = (SSLSocket)serverSocket.accept();


            InputStream is = socket.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String input = br.readLine();
            System.out.println("Message received from client is " + input);
            /*if(PacketReader.isPacket(input)){
                if(PacketReader.shouldSendDataBack(input)){

                }
            }*/
            /*
             * 
             * if client has data waiting or client has new data
             * request new data.
             * else, wait 5 seconds and repeat
             * 
             * 
             */



            // Sending the response back to the client.
            /*OutputStream os = socket.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(os);
            BufferedWriter bw = new BufferedWriter(osw);
            bw.write("");*/

            //TODO Implement method to send this data to client storage data.

            //bw.flush();
        }
    //Check for exceptions and try to close the socket.
    } catch (Exception e) {

        e.printStackTrace();
        } finally {
            try {
                socket.close();
            } catch (Exception e) {
        }
    }
}

Edit: I have just added the password, but my entry/certificate does not have a key, could this be contributing to the error? How can I fix it?

Answer 1

Surprisingly, this can mean that the server couldn't find a private key/certificate pair. In this case it is because you haven't specified the keystore password via javax.net.ssl.keyStorePassword.