Bn8RJNyf

1public class EncryptionUtil {
2    private static final String KEY = "test01";
3
4    public static String encrypt(String plainText) {
5        try {
6
7            byte[] keyStart = KEY.getBytes();
8            KeyGenerator kgen = KeyGenerator.getInstance("AES");
9            SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
10            sr.setSeed(keyStart);
11            kgen.init(128, sr); // 192 and 256 bits may not be available
12            SecretKey skey = kgen.generateKey();
13            byte[] key = skey.getEncoded();
14
15            // encrypt
16            byte[] encryptedData = encrypt(key, plainText.getBytes());
17            return new String(encryptedData, "UTF-8");
18        } catch (Exception ex) {
19            ex.printStackTrace();
20            return null;
21        }
22    }
23
24    private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
25        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
26        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
27        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
28        byte[] encrypted = cipher.doFinal(clear);
29        return encrypted;
30    }
31
32    private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
33        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
34        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
35        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
36        byte[] decrypted = cipher.doFinal(encrypted);
37        return decrypted;
38    }
39}