Egext7jR

1package com.company;
2//Serwer
3
4import javafx.application.Application;
5import javafx.stage.Stage;
6import java.io.*;
7import java.math.BigInteger;
8import java.net.ServerSocket;
9import java.net.Socket;
10import java.security.SecureRandom;
11
12
13public class Main extends Application {
14
15    @Override
16    public void start(Stage primaryStage) throws Exception{
17    }
18
19    public static void main(String[] args)throws Exception  {
20
21        System.out.println("Serwer bangla! :D");
22
23        ServerSocket socket = new ServerSocket(8080);
24        Socket connectionSocket = socket.accept();
25        ObjectOutputStream outToClient = new ObjectOutputStream(connectionSocket.getOutputStream());
26        ObjectInputStream inFromClient = new ObjectInputStream(connectionSocket.getInputStream());
27
28        //DH
29        BigInteger p = (BigInteger)inFromClient.readObject();
30        BigInteger g = (BigInteger)inFromClient.readObject();
31        BigInteger b= new BigInteger(90,new SecureRandom());
32        BigInteger B= g.modPow(b,p);
33        outToClient.writeObject(B);
34        BigInteger A = (BigInteger)inFromClient.readObject();
35        BigInteger s = A.modPow(b,p);
36        //System.out.println(s);
37
38        final String secretKey = "pw"+s;
39        String binary = (String)inFromClient.readObject();
40        socket.close();
41        String encry = AES.decrypt(binary, secretKey);
42        System.out.println("Takie czary: " + binary);
43        String text = new String(new BigInteger(encry, 2).toByteArray());
44        System.out.println("Odczarowano: " + text);
45    }
46}