L6abggw1

1public class Main {
2
3    public static void main(String[] args) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, InvalidAlgorithmParameterException {
4        SecureRandom sr = new SecureRandom();
5        sr.generateSeed(128);
6        byte[] sKeyBytes = new byte[16];
7        sr.nextBytes(sKeyBytes);
8        SecretKey sKey = new SecretKeySpec(sKeyBytes, "AES");
9        byte[] iv = new byte[16];
10        sr.nextBytes(iv);
11        IvParameterSpec ips = new IvParameterSpec(iv);
12
13        File f = new File("bla.txt");
14        byte[] array = Files.readAllBytes(f.toPath());
15        Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
16        c.init(Cipher.ENCRYPT_MODE, sKey, ips);
17        File f2 = new File("wynik.enc");
18
19        FileOutputStream fos = new FileOutputStream(f2);
20        CipherOutputStream cos = new CipherOutputStream(fos, c);
21        cos.write(array);
22        cos.close();
23        fos.close();
24
25        Cipher c2 = Cipher.getInstance("AES/CBC/PKCS5Padding");
26        c2.init(Cipher.DECRYPT_MODE, sKey, ips);
27        FileInputStream fis = new FileInputStream(f2);
28        CipherInputStream cis = new CipherInputStream(fis, c2);
29        byte[] array2 = new byte[1024];
30        cis.read(array2);
31        cis.close();
32        fis.close();
33
34        FileOutputStream fos2 = new FileOutputStream("nowy.txt");
35        fos2.write(array2);
36        fos2.close();
37    }
38}