MHi05Xy6

1public static SecretKey GenerateKeyForCBC() throws NoSuchAlgorithmException {
2		    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
3	        keyGenerator.init(128);
4
5	        SecretKey key = keyGenerator.generateKey();
6	        byte[] IV = new byte[16];
7	        SecureRandom random = new SecureRandom();
8	        random.nextBytes(IV);
9	        
10	        return key;
11
12	}
13 public static byte[] encrypt (byte[] plaintext,SecretKey key,byte[] IV ) throws Exception{
14	    
15	        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
16	        SecretKeySpec keySpec = new SecretKeySpec(key.getEncoded(), "AES");
17	        IvParameterSpec ivSpec = new IvParameterSpec(IV);
18	        cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
19	        byte[] cipherText = cipher.doFinal(plaintext);
20	        
21	        return cipherText;
22	    }
23	 public static byte[] decrypt (byte[] cipherText, SecretKey key,byte[] IV) throws Exception{
24	        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
25	        SecretKeySpec keySpec = new SecretKeySpec(key.getEncoded(), "AES");
26	        IvParameterSpec ivSpec = new IvParameterSpec(IV);
27	        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
28	        byte[] decryptedText = cipher.doFinal(cipherText);
29	        return decryptedText;
30	    }