7PB1JFVn

1public class Encryption
2    {
3        private static String ALGORITHM = "AES";
4        private static String TRANSFORMATION = "AES";
5
6        public static void encrypt(String key, File inputFile, File outputFile)
7        {
8            doCrypto(Cipher.ENCRYPT_MODE, key, inputFile, outputFile);
9        }
10
11        public static void decrypt(String key, File inputFile, File outputFile)
12
13        {
14            doCrypto(Cipher.DECRYPT_MODE, key, inputFile, outputFile);
15        }
16
17        private static void doCrypto(int cipherMode, String key, File inputFile,
18                File outputFile)
19        {
20            Key secretKey = new SecretKeySpec(key.getBytes(), ALGORITHM);
21            Cipher cipher = Cipher.getInstance(TRANSFORMATION);
22            cipher.init(cipherMode, secretKey);
23
24            FileInputStream inputStream = new FileInputStream(inputFile);
25            byte[] inputBytes = new byte[(int)inputFile.length()];
26            inputStream.read(inputBytes);
27
28            byte[] outputBytes = cipher.doFinal(inputBytes);
29
30            FileOutputStream outputStream = new FileOutputStream(outputFile);
31            outputStream.write(outputBytes);
32
33            inputStream.close();
34            outputStream.close();
35
36            
37        }
38    }