docs: private static byte[] lmv2Response(final byte[] hash, final byte[] challenge, final byte[] clientData)
              throws AuthenticationException {
          final HMACMD5 hmacMD5 = new HMACMD5(hash);
          hmacMD5.update(challenge);
          hmacMD5.update(clientData);
          final byte[] mac = hmacMD5.getOutput();
          final byte[] lmv2Response = new byte[mac.length + clientData.length];
          System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
          System.arraycopy(clientData, 0, lmv2Response, mac.length, clientData.length);
          return lmv2Response;
      }