RuFf9aed

1import java.net.*;
2import java.io.*;
3import java.security.InvalidAlgorithmParameterException;
4import java.security.InvalidKeyException;
5import java.security.NoSuchAlgorithmException;
6import javax.crypto.*;
7import javax.crypto.spec.IvParameterSpec;
8import javax.crypto.spec.SecretKeySpec;
9
10public class Server{
11    public static void main(String args[]){
12        int number=0;
13        try{
14            int serverPort = 4567;
15            ServerSocket listenSocket = new ServerSocket(serverPort);
16            while(true) {
17                Socket clientSocket = listenSocket.accept();
18                new Connection(clientSocket,number);
19                number++;
20            }
21        } catch(IOException e) {
22            System.out.println("Listen:" + e.getMessage());
23        }
24    }
25}
26
27class Connection extends Thread {
28    DataInputStream in;
29    DataOutputStream out;
30    Socket clientSocket;
31    int number;
32
33    public Connection (Socket aClientSocket,int clientNumber) {
34
35        try{
36            number=clientNumber;
37            clientSocket = aClientSocket;
38            in = new DataInputStream(clientSocket.getInputStream());
39            out = new DataOutputStream(clientSocket.getOutputStream());
40            this.start();
41        }catch(IOException e){System.out.println("Connection:" + e.getMessage());}
42    }
43
44    public void run(){
45        try{
46            while(true){
47                //key
48                /*KeyGenerator keyGen = KeyGenerator.getInstance("AES");
49                keyGen.init(128);
50                SecretKey secretKey = keyGen.generateKey();*/
51                byte [] key = {1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4};
52                SecretKey secretKey = new SecretKeySpec(key, 0, key.length, "AES");
53
54                //nonce
55                byte[] nonce={1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
56                IvParameterSpec iv = new IvParameterSpec(nonce);
57
58                Cipher c = Cipher.getInstance("AES/CTR/NoPadding");
59                c.init(Cipher.DECRYPT_MODE, secretKey, iv);
60                processFile(c);
61
62            }
63        } catch (NoSuchPaddingException e) {
64            e.printStackTrace();
65        } catch (NoSuchAlgorithmException e) {
66            e.printStackTrace();
67        } catch (InvalidKeyException e) {
68            e.printStackTrace();
69        } catch (InvalidAlgorithmParameterException e) {
70            e.printStackTrace();
71        } catch (IOException e) {
72            e.printStackTrace();
73        }
74    }
75
76    static private void processFile(Cipher c) throws IOException {
77        FileInputStream file = new FileInputStream("C:\\Users\\maria\\IdeaProjects\\AC2\\src\\encrypt.txt");
78        CipherInputStream cis = new CipherInputStream(file, c);
79        int text;
80        while((text=cis.read())!=-1) {
81            System.out.print((char)text);
82        }
83        cis.close();
84        file.close();
85    }
86}