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Encrypt1.java
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Encrypt1.java
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//************************************************************
//************************************************************
// Encrypt0
// Copyright (c) 2011 by Stefano Molle
// ALL RIGHTS RESERVED
//************************************************************
//************************************************************
// Date: 11/03/2011 Coded by: Stefano Molle (MECT) 10212220
// Module name: CA 644
// Source file: Encrypt1.java
// Program description:
// This program fullfills the requirements for Continuous Assessment for
// public key Cryptography and security protocols
//************************************************************
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
public class Encrypt1 {
/**
* @param args
*/
public static void main(String[] args) {
try {
String message = "";
int port = 8003;
String ip ="127.0.0.1" ;
//the byte data to be sent across encrypted
byte[] b = {0x08,0x03,0x00,0x07,0x07,0x07,0x00,0x07,0x07,0x09,0x07,0x08,0x09,0x05};
if(args.length == 1){
message = args[0];
}else if (args.length == 2){
ip = args[0];
message = args[1];
}else if(args.length == 3){
ip = args[0];
port = Integer.parseInt(args[1]);
message = args[2];
}else{
System.out.println("Incorrect arguments given:3");
System.exit(1);
}
Socket socket = new Socket(ip,port);
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
DataInputStream in = new DataInputStream(socket.getInputStream());
ByteArrayOutputStream buf = new ByteArrayOutputStream();
ByteArrayOutputStream encryptBuf = new ByteArrayOutputStream();
//Encode the binary data and message as a nested encode
encodeNested(buf, message, b);
//Encrypt the Message
byte[] encryptedBinMessage = Helper.encrypt(buf.toByteArray());
//Encode the encypted message as a binary encode
Helper.encodeBin(encryptBuf, encryptedBinMessage);
//Convert buffer to byte array and send to server
out.write(encryptBuf.toByteArray());
//Start receiving data + decode the binary encode to retrieve encrypted ciphertext
byte[] response1 = Helper.decodeBin(in);
//Decypted cipher text
byte[] decryted = Helper.decrypt(response1);
ByteArrayInputStream bais = new ByteArrayInputStream(decryted);
//Decode the nested encode to retrieve two byte array's within an ArrayList
//1st byte array holds the binary data and the 2nd holds the string data
ArrayList decoded = Helper.decodeFromServer(bais);
byte[] bytesDecoded = (byte[])decoded.get(0);
for(int i = 0; i < bytesDecoded.length; i++){
if(bytesDecoded[i] != b[i]){
System.out.println("they are the not same bytes, exiting system");
System.exit(0);
}
}
byte[] stringDecoded = (byte[]) decoded.get(1);
//Create the string from the byte array
String resposeString = new String(stringDecoded);
//print out the data
System.out.println("");
System.out.println("Connected to remote address "+ socket.getRemoteSocketAddress().toString().substring(1));
System.out.println("Connected from the local address " + socket.getLocalSocketAddress().toString().substring(1));
System.out.println("String received = "+resposeString.substring(0,resposeString.length()-2));
System.out.println("Binary data Received contained " + bytesDecoded.length+" Bytes");
System.out.println("");
out.close();
in.close();
socket.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void encodeNested(ByteArrayOutputStream buf,String message, byte[] binData){
buf.write(0x04);
//encode the string with the correct encoding for a nested string
Helper.encodeString(buf,message,true);
//encode the binary data with the correct encoding for a nested string
Helper.encodeBin(buf,binData,true);
buf.write(0x00);
buf.write(0x00);
}
}