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1public static String decrypt(byte[] cipherText) throws Exception
2{
3
4        String encryptionKey = "6qp4Y?kLmaY8+Fsd";
5        byte[] key = encryptionKey.getBytes("UTF-8");
6        SecretKeySpec secretKey = new SecretKeySpec(key, "AES128");
7
8        byte[] IV = new byte[16];
9        SecureRandom random = new SecureRandom();
10        random.nextBytes(IV);
11
12        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
13        SecretKeySpec keySpec = new SecretKeySpec(secretKey.getEncoded(), "AES");
14        IvParameterSpec ivSpec = new IvParameterSpec(IV);
15        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
16        byte[] decryptedText = cipher.doFinal(cipherText);
17        return new String(decryptedText);
18}
19
20
21public static byte[] encrypt(byte[] plaintext, SecretKey key, byte[] IV) throws Exception
22{
23        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
24        SecretKeySpec keySpec = new SecretKeySpec(key.getEncoded(), "AES");
25        IvParameterSpec ivSpec = new IvParameterSpec(IV);
26        cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
27        byte[] cipherText = cipher.doFinal(plaintext);
28        return cipherText;
29}