pG67dFqw

1public static String encode(String privateKey, String publicKey, long timestamp, String requestData) throws Exception
2    {
3        char[] hexArray = "0123456789ABCDEF".toCharArray();
4        String data = publicKey + String.valueOf(timestamp) + requestData;
5        Mac sha512_HMAC = Mac.getInstance("HmacSHA512");
6        SecretKeySpec secret_key = new SecretKeySpec(privateKey.getBytes("UTF-8"), "HmacSHA512");
7        sha512_HMAC.init(secret_key);
8        byte[] bytes = sha512_HMAC.doFinal(data.getBytes("UTF-8"));
9        char[] hexChars = new char[bytes.length * 2];
10        for ( int j = 0; j < bytes.length; j++ ) {
11            int v = bytes[j] & 0xFF;
12            hexChars[j * 2] = hexArray[v >>> 4];
13            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
14        }
15        Log.e(TAG, " ENCODE STRING " + publicKey + String.valueOf(timestamp) + requestData);
16        return new String(hexChars).toLowerCase();
17    }
18
19    public static String createTransactionID() throws Exception
20    {
21        return UUID.randomUUID().toString();
22    }