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Thread: SSL Chat implementation

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    Default SSL Chat implementation

    Hi,
    I would like to program SSL Chat. I have not experence with this stuff. OK I have one question. Is possibility do it that way first thread should be work like Server (SSLServerSockte) this Thread should be reciving data. And second Thread should be work like Client (SSL Socket) and send data to another same program. Or how can i do this? Thanks a lot.


  2. #2
    Senile Half-Wit Freaky Chris's Avatar
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    Default Re: SSL Chat

    Yes that is possible. ServerSockets and Sockets are essentially the same thing. However a server socket waits for a connection, once it has one it binds it to a normal Socket, thus it can be used the same as a socket. Sockets are capable of both sending and recieving data.

    But what you have said is perfectly possible, I'd suggest reading up on Sockets and ServerSockets. Then looking into how you manage the newer SSL Extensions to the Socket connections. Since data sending etc is done using the same methods, but handshakes etc are required before hand using SSL Sockets.

    Chris

  3. The Following User Says Thank You to Freaky Chris For This Useful Post:

    Koren3 (April 23rd, 2009)

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    Default Re: SSL Chat

    Thanks Chris. I already did this program. But i am not sure if it is right. Befero I did SocketDatagram it is new stuff for me. Could you look on my code? Thank you.

    import java.io.BufferedReader;
    import java.io.BufferedWriter;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.io.OutputStreamWriter;
    import java.util.logging.Level;
    import java.util.logging.Logger;
    import javax.net.ssl.SSLServerSocket;
    import javax.net.ssl.SSLServerSocketFactory;
    import javax.net.ssl.SSLSocket;
    import javax.net.ssl.SSLSocketFactory;
     
    /**
     * SslReverseEchoer.java
     * Copyright (c) 2005 by Dr. Herong Yang
     */
     
    public class Main {
       public static void main(String[] args) {
           String adresaIP;
           if(args.length==0)
           {
                adresaIP="127.0.0.1";
           }
           else
           {
               adresaIP=args[0];
           }
          PrijimaciVlakno prijmout = new PrijimaciVlakno();
          OdesilaciVlakno odeslat = new OdesilaciVlakno(adresaIP);
     
          prijmout.prijimaci.start();
          odeslat.prijimaci.start();
       } 
    }
     
    class PrijimaciVlakno implements Runnable
    {   Thread prijimaci; 
     
        public PrijimaciVlakno()
        {
            prijimaci = new Thread(this,"Prijimaci vlakno");
        }
        public void run()
        {
            try {
                SSLServerSocketFactory sslFactory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
                SSLServerSocket sslServer = (SSLServerSocket) sslFactory.createServerSocket(5000);
                SSLSocket ssl = (SSLSocket) sslServer.accept();
                System.out.println("Adresa hostitele:"+ssl.getInetAddress().getHostName());
     
                while(true){
     
                    BufferedReader cteniZeSocketu = new BufferedReader(new InputStreamReader(ssl.getInputStream()));
                    String radek = null;
                    while((radek = cteniZeSocketu.readLine())!=null)
                    {
                        System.out.println("Prijata data:"+radek);
                        System.out.flush();
                    }
                }
     
            } catch (IOException ex) {
     
            }
        }
    }
     
    class OdesilaciVlakno implements Runnable
    {   Thread prijimaci;
        private String adresaIP;
        public OdesilaciVlakno(String ip)
        {
            this.adresaIP=ip;
            prijimaci = new Thread(this,"Prijimaci vlakno");
        }
        public void run()
        {   
            try {
                SSLSocketFactory sslFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
                SSLSocket ssl = (SSLSocket) sslFactory.createSocket(this.adresaIP,5000);
     
                BufferedReader klavesnice = new BufferedReader(new InputStreamReader(System.in));
     
                OutputStream vystupniProud = ssl.getOutputStream();
                BufferedWriter zapisDoSocketu = new BufferedWriter(new OutputStreamWriter(vystupniProud));
     
                String radek = null;
                while((radek = klavesnice.readLine())!=null)
                {
                    zapisDoSocketu.write(radek+'\n');
                    zapisDoSocketu.flush();
                    System.out.println("Posilana data:"+radek);
                }
            } catch (IOException ex) {
                Logger.getLogger(OdesilaciVlakno.class.getName()).log(Level.SEVERE, null, ex);
            } 
        }
    }

  5. #4
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    Default Re: SSL Chat

    Can I ask what the program is supposed to do at this stage, once I know that when I'm next at home I will have a look for you, but in college I'm cannot do any socket programming due to firewalls and port monitoring and blocking :@

    But ye what is it supposed to do

    Thanks,
    Chris

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    Default Re: SSL Chat

    I hope that This program conect to another same program and it will work like chat. Maybe my code is whole wrong I donīt know. How can i do more simply but both of "programs" must be same. No client server but like server server or client client or my program is hope client and server in one.

  7. #6
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    Default Re: SSL Chat

    This should help to explain P2P concepts. It also has an Example Java & Python P2P Implementation

    Berry College - Peer to Peer Programming

    Chris

  8. #7
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    Default Re: SSL Chat

    I know P2P. I need this program that This program can be use for more people you know. Every one who will have this program can communicate but always Peer to Peer. Do you understand me?

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