bprH16GB

1package aes;
2
3import javax.crypto.Cipher;
4import javax.crypto.spec.SecretKeySpec;
5
6public class AdvancedEncryptionStandard {
7    private byte[] key;
8
9    public AdvancedEncryptionStandard(byte[] key){
10        this.key = key;
11    }
12
13    public byte[] encrypt(byte[] plainText) throws Exception{
14        SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
15        Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
16        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
17
18        return cipher.doFinal(plainText);
19    }
20
21    public byte[] decrypt(byte[] cipherText) throws Exception{
22        SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
23        Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
24        cipher.init(Cipher.DECRYPT_MODE, secretKey);
25
26        return cipher.doFinal(cipherText);
27    }
28}