1G6UV5ue

1public static byte[] calculateMAC(byte[] _aiOutBufferForMacCalculation, String key) {
2    try{
3
4        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
5        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes(), "HmacSHA256");
6        sha256_HMAC.init(secret_key);
7        byte[] mac_data=sha256_HMAC.doFinal(_aiOutBufferForMacCalculation);
8
9        String result = "";
10        for (final byte element : mac_data)
11        {
12            result += Integer.toString((element & 0xff) + 0x100, 16).substring(1);
13        }
14        System.out.println("Result:[" + result + "]");
15
16        return mac_data;
17    } catch (Exception _exception) {
18        _exception.printStackTrace();
19    }
20
21    public static byte[] hexStringToByteArray(String s) {
22    int len = s.length();
23    byte[] data = new byte[len / 2];
24    for (int i = 0; i < len; i += 2) {
25        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
26                             + Character.digit(s.charAt(i+1), 16));
27    }
28    return data;
29}
30
31   public static void main(String[] args) {
32    String key = "7F6D7A688019DC4CA83883F2459E6B389BE99BB63B622A97";
33    String cadena = "1800990000014303181112190600048430303030303134370029030003483032001148324830303030303135320008143919751D5EB97C";
34
35
36    byte[] data_for_mac = hexStringToByteArray(cadena);
37
38    System.out.println(new String(data_for_mac));
39
40    byte[]mac =  calculateMAC(data_for_mac,key);
41
42
43
44}
45
46}