difihelman_client_is7.java

package substitution_transposition_cipher;
/**
 *
 * @author admin
 */
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.util.Scanner;
public class difihelman_client_is7 {
    public static void main(String[] args) throws IOException 
    {
        int n=11,g=7;
        Scanner sc = new Scanner (System.in);
        InetAddress ip = InetAddress.getLocalHost();
        Socket s = new Socket(ip, 5000);
        DataInputStream dis = new DataInputStream(s.getInputStream());
        DataOutputStream dos = new DataOutputStream(s.getOutputStream());
        System.out.println("connection done !");
        DataInputStream d1 = new DataInputStream(s.getInputStream());
        DataOutputStream d2 = new DataOutputStream(s.getOutputStream());
        System.out.println("Enter B's private key" );
        double y=sc.nextDouble();
        double b=(Math.pow(g, y))% n;
        String str = d1.readUTF(); System.out.println("received msg from Server" + str);
        System.out.println("sent msg to server"+b );
        d2.writeUTF(b+"");
        double a = Double.valueOf(str);
        double k2 = (Math.pow(a, y))%n;
        System.out.println("sent msg to server"+k2 );
        d2.writeUTF(k2+"");
        str = d1.readUTF();
        System.out.println("received msg from Server "+ str);
        if(str.equals(k2+""))
            System.out.println("Keys matched");
        else
            System.out.println("Keys are not matched");
    }
}