enum KeyFileFormat {
  ftpKeyFileFormatUnknown = 0,
  ftpKeyFileFormatPKCS8 = 1,
  ftpKeyFileFormatPKCS12 = 2,
  ftpKeyFileFormatVanDyke = 3,
  ftpKeyFileFormatSSH = 4,
  ftpKeyFileFormatOpenSSL = 5,
  ftpKeyFileFormatPutty = 6,
  ftpKeyFileFormatOpenSSH = 7
};