81imVZfn

1byte[] a = encryptFIN128AES("pls");
2            String b = decryptFIN128AES(a);
3            Log.e("AES_Test", "b = " + b);
4
5
6/**
7 * Encrypts a string with AES (128 bit key)
8 * @param fin 
9 * @return the AES encrypted byte[]
10 */
11private byte[] encryptFIN128AES(String fin) {
12
13    SecretKeySpec sks = null;
14
15    try {
16        sks = new SecretKeySpec(generateKey("Test1".toCharArray(), "Test2".getBytes()).getEncoded(),"AES");
17    } catch (Exception e) {
18        Log.e("encryptFIN128AES", "AES key generation error");
19    }
20
21    // Encode the original data with AES
22    byte[] encodedBytes = null;
23    try {
24        Cipher c = Cipher.getInstance("AES");
25        c.init(Cipher.ENCRYPT_MODE, sks);
26        encodedBytes = c.doFinal(fin.getBytes());
27    } catch (Exception e) {
28        Log.e("encryptFIN128AES", "AES encryption error");
29    }
30
31    return encodedBytes;
32
33}
34
35
36/**
37 * Decrypts a string with AES (128 bit key)
38 * @param encodedBytes
39 * @return the decrypted String
40 */
41private String decryptFIN128AES(byte[] encodedBytes) {
42
43    SecretKeySpec sks = null;
44
45    try {
46        sks = new SecretKeySpec(generateKey("Test1".toCharArray(), "Test2".getBytes()).getEncoded(),"AES");
47    } catch (Exception e) {
48        Log.e("decryptFIN128AES", "AES key generation error");
49    }
50
51    // Decode the encoded data with AES
52    byte[] decodedBytes = null;
53    try {
54        Cipher c = Cipher.getInstance("AES");
55        c.init(Cipher.DECRYPT_MODE, sks);
56        decodedBytes = c.doFinal(encodedBytes);
57    } catch (Exception e) {
58        Log.e("decryptFIN128AES", "AES decryption error");
59    }
60
61    return Base64.encodeToString(decodedBytes, Base64.DEFAULT);
62}
63
64
65public static SecretKey generateKey(char[] passphraseOrPin, byte[] salt)
66        throws NoSuchAlgorithmException, InvalidKeySpecException {
67
68    final int iterations = 1000;
69
70    // Generate a 256-bit key
71    final int outputKeyLength = 128;
72
73    SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
74    KeySpec keySpec = new PBEKeySpec(passphraseOrPin, salt, iterations, outputKeyLength);
75    SecretKey secretKey = secretKeyFactory.generateSecret(keySpec);
76    return secretKey;
77}
78	
79E/AES_Test: b = cGxz