pUXzjj57

1import javax.crypto.*;
2import java.io.File;
3import java.io.IOException;
4import java.io.UnsupportedEncodingException;
5import java.net.URI;
6import java.nio.charset.StandardCharsets;
7import java.nio.file.Files;
8import java.security.InvalidKeyException;
9import java.security.NoSuchAlgorithmException;
10import java.security.SecureRandom;
11
12public class Test1 {
13
14
15
16    Cipher cipher;
17    SecretKey secretKey;
18    byte[] plainText = "Zaszyfrowana wiadomość".getBytes("UTF-8");
19
20    URI uri;
21
22    public Test1() throws NoSuchPaddingException, NoSuchAlgorithmException, IOException, BadPaddingException, InvalidKeyException, IllegalBlockSizeException {
23
24        cipher = Cipher.getInstance("AES");
25
26        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
27        SecureRandom secureRandom = new SecureRandom();
28        int keyBitSize = 256;
29        keyGenerator.init(keyBitSize,secureRandom);
30
31        secretKey = keyGenerator.generateKey();
32
33        File f = new File("C:\\Users\\Max\\Documents\\GitHub\\Playground\\res\\sztos.jpg");
34        byte[] fileContent = Files.readAllBytes(f.toPath());
35        byte[] encryptedFileContent = szyfruj(fileContent);
36        File fEncrypted = new File("C:\\Users\\Max\\Documents\\GitHub\\Playground\\res\\sztosEncrypted.txt");
37
38        byte[] dectyptedFileContent = deszyfruj(encryptedFileContent);
39        File f1 = new File("C:\\Users\\Max\\Documents\\GitHub\\Playground\\res\\sztos1.jpg");
40
41
42
43            try {
44                Files.write(f1.toPath(), dectyptedFileContent);
45
46                Files.write(fEncrypted.toPath(), encryptedFileContent);
47            } catch (IOException e) {
48                e.printStackTrace();
49            }
50
51    }
52
53    public byte[] szyfruj() throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
54
55        cipher.init(Cipher.ENCRYPT_MODE,secretKey);
56        byte[] cipherText= cipher.doFinal(plainText);
57
58        //showPlease(cipherText);
59        //showPlease(new String(cipherText, StandardCharsets.UTF_8));
60
61        return cipherText;
62    }
63
64    public byte[] szyfruj(byte[] plainText) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
65
66        cipher.init(Cipher.ENCRYPT_MODE,secretKey);
67        byte[] cipherText= cipher.doFinal(plainText);
68
69        showPlease(cipherText);
70        //showPlease(new String(cipherText, StandardCharsets.UTF_8));
71
72        return cipherText;
73    }
74
75    public byte[] deszyfruj(byte[] plainText) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
76
77        cipher.init(Cipher.DECRYPT_MODE,secretKey);
78        byte[] cipherText= cipher.doFinal(plainText);
79        showPlease(cipherText);
80        showPlease(new String(cipherText, StandardCharsets.UTF_8));
81        return cipherText;
82    }
83
84    public void showPlease(byte[] args){
85        for (byte b : args
86             ) {
87            System.out.print(b);
88        }
89        System.out.println();
90    }
91
92
93    public void showPlease(String args){
94        System.out.println(args);
95    }
96
97
98}