@c gnutls_privkey_type_t
@table @code
@item GNUTLS_@-PRIVKEY_@-X509
X.509 private key, @code{gnutls_x509_privkey_t} .
@item GNUTLS_@-PRIVKEY_@-OPENPGP
OpenPGP private key, @code{gnutls_openpgp_privkey_t} .
@item GNUTLS_@-PRIVKEY_@-PKCS11
PKCS11 private key, @code{gnutls_pkcs11_privkey_t} .
@item GNUTLS_@-PRIVKEY_@-EXT
External private key, operating using callbacks.
@end table