public class Script {
   public static void main(String[] args) {
      String resultString = "iflipit.mondadorieducation.it/sync/getEditorNotes.php?srd=&srnm=&iss=TVM1MDQ1MV8yMDE1&t=1465141330757&track_os=ios&track_osversion=9.3.2&track_device=tablet&track_uid=&track_appversion=4.3.4";
      String privateKey = "og8WGTtmeFaZ7eNVH4EC9ueTwNx3KSKzenio9ePe2G2yHHi8NIsxmMAlsnHZiYPD";
      System.out.println(generate_HMAC_SHA1(resultString, privateKey));
   }

    public static String sha1Hash(String toHash) {
        String hash = null;
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-1");
            digest.update(toHash.getBytes(), 0, toHash.length());
            hash = new BigInteger(1, digest.digest()).toString(16);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return hash;
    }

    public static String generate_HMAC_SHA1(String daFirmare, String secretKey) throws InvalidKeyException, NoSuchAlgorithmException {
        return binary2ASCIIHex(calcSHA1MAC(Base64.decode(secretKey, 0), daFirmare));
    }

    private static byte[] calcSHA1MAC(byte[] abyte0, String s) throws NoSuchAlgorithmException, InvalidKeyException {
        byte[] abyte1 = null;
        SecretKeySpec secretkeyspec = new SecretKeySpec(abyte0, "DES");
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(secretkeyspec);
        return mac.doFinal(s.getBytes());
    }
}