enum KeyAlgo {
  ftpKeyAlgoUnknown = 0,
  ftpKeyAlgoRSA = 1,
  ftpKeyAlgoDSA = 2,
  ftpKeyAlgoECDSAP256 = 3,
  ftpKeyAlgoECDSAP384 = 4,
  ftpKeyAlgoECDSAP521 = 5,
  ftpKeyAlgoEd25519 = 6
};