V6VzPgH9

1import javax.crypto.Cipher;
2import javax.crypto.spec.SecretKeySpec;
3
4public class Main {
5    public static void main(String[] args) throws Exception {
6        byte[] plain = "abcdefghijklmnopabcdefghijklmnop".getBytes();
7        byte[] key = "klucz--128-bitow".getBytes();
8        String plainString= new String(plain,"UTF-8");
9        String encryptedString;
10        String decryptedStrng;
11        SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
12        Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
13        System.out.println(plainString);
14
15
16        // szyfrowanie
17        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
18        byte encrypted[] = cipher.doFinal(plain);
19        encryptedString=new String (encrypted,"UTF-8");
20        System.out.println(encryptedString);
21
22        // deszyfrowanie
23        cipher.init(Cipher.DECRYPT_MODE, secretKey);
24        byte decrypted[] = cipher.doFinal(encrypted);
25        decryptedStrng=new String (decrypted,"UTF-8");
26        System.out.println(decryptedStrng);
27
28    }
29}