zRBPaChT

1
2import javax.crypto.*;
3import javax.crypto.spec.IvParameterSpec;
4import javax.crypto.spec.SecretKeySpec;
5import java.nio.ByteBuffer;
6import java.security.InvalidKeyException;
7import java.security.NoSuchAlgorithmException;
8import java.security.SecureRandom;
9import java.util.Arrays;
10import java.util.HashMap;
11import java.util.Map;
12
13public class Mitm {
14
15    private static Map<Integer, byte[]> mapEncrypted = new HashMap<>();
16    private static Map<Integer, byte[]> mapDecrypted = new HashMap<>();
17    private static Map<Integer, byte[]> mapPair = new HashMap<>();
18    private static byte[] textPlain = "nooooooo".getBytes();
19    private static byte[] textCipher1;
20    private static byte[] textCipher2;
21    private static int total = (int) Math.pow(2,3);
22
23
24    private static void cryptDES() {
25        try {
26            Cipher ecipher = Cipher.getInstance("DES/ECB/NoPadding");
27            byte[] bytes;
28            SecretKey key;
29            byte[] textEncrypted;
30
31            for (int i = 0; i < total; i++) {
32
33                bytes = ByteBuffer.allocate(8).putLong(i).array();
34                key = new SecretKeySpec(bytes, 0, bytes.length, "DES");
35                ecipher.init(Cipher.ENCRYPT_MODE, key);
36                textEncrypted = ecipher.doFinal(textPlain);
37                mapEncrypted.put(i, textEncrypted);
38            }
39
40            for (Map.Entry<Integer, byte[]> entry : mapEncrypted.entrySet())
41            {
42                System.out.println("Key : " + entry.getKey() + " Encrypted Text : " + Arrays.toString(entry.getValue()));
43            }
44
45
46        } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
47            e.printStackTrace();
48        }
49
50    }
51
52
53    private static void decryptDES() {
54        try {
55            Cipher dcipher = Cipher.getInstance("DES/ECB/NoPadding");
56            byte[] bytes;
57            SecretKey key;
58            byte[] textDecrypted;
59
60            for (int i = 0; i < total; i++) {
61                bytes = ByteBuffer.allocate(8).putLong(i).array();
62                key = new SecretKeySpec(bytes, 0, bytes.length, "DES");
63                dcipher.init(Cipher.DECRYPT_MODE, key);
64                textDecrypted = dcipher.doFinal(textCipher2);
65                mapDecrypted.put(i, textDecrypted);
66            }
67
68
69            for (Map.Entry<Integer, byte[]> entry : mapDecrypted.entrySet())
70            {
71                System.out.println("Key : " + entry.getKey() + " Decrypted Text : " + Arrays.toString(entry.getValue()));
72                //System.out.println("Size : " + entry.getValue().length);
73            }
74
75
76
77        } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
78            e.printStackTrace();
79        }
80
81    }
82
83
84    private static void doubleDES() {
85        try {
86
87            Cipher ecipher1 = Cipher.getInstance("DES/ECB/NoPadding");
88            Cipher ecipher2 = Cipher.getInstance("DES/ECB/NoPadding");
89
90
91            byte[] bytes1 = ByteBuffer.allocate(8).putLong(4).array();
92            byte[] bytes2 = ByteBuffer.allocate(8).putLong(2).array();
93
94            SecretKey key1 = new SecretKeySpec(bytes1, 0, bytes1.length, "DES");
95            SecretKey key2 = new SecretKeySpec(bytes2, 0, bytes2.length, "DES");
96
97
98            ecipher1.init(Cipher.ENCRYPT_MODE, key1);
99            ecipher2.init(Cipher.ENCRYPT_MODE, key2);
100
101            textCipher1 = ecipher1.doFinal(textPlain);
102            textCipher2 = ecipher2.doFinal(textCipher1);
103
104            mapPair.put(0,textPlain);
105            mapPair.put(1,textCipher1);
106
107        } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
108            e.printStackTrace();
109        }
110
111    }
112
113
114    public static void main(String[] args) {
115        doubleDES();
116        cryptDES();
117        decryptDES();
118
119
120
121        for (int i=0; i < 10; i++) {
122            System.out.println(Arrays.toString(new boolean[]{Arrays.equals(textCipher1, mapEncrypted.get(i))}));
123
124        }
125
126    }
127}