9FrcbPZM

1private static String computeSignature(String baseString, String keyString) throws GeneralSecurityException, UnsupportedEncodingException {
2
3    SecretKey secretKey = null;
4
5    byte[] keyBytes = keyString.getBytes();
6    secretKey = new SecretKeySpec(keyBytes, "HmacSHA1");
7
8    Mac mac = Mac.getInstance("HmacSHA1");
9
10    mac.init(secretKey);
11
12    byte[] text = baseString.getBytes();
13
14    return new String(Base64.encodeBase64(mac.doFinal(text))).trim();
15}