enum HMAC {
  ftpHMACUnknown = 0,
  ftpHMACSHA1 = 2,
  ftpHMACNone = 6,
  ftpHMACSHA2256 = 8,
  ftpHMACSHA2512 = 9,
  ftpHMACSHA2256Etm = 10,
  ftpHMACSHA2512Etm = 11
};