@deftypefun {int} {gnutls_openpgp_privkey_sign_hash} (gnutls_openpgp_privkey_t @var{key}, const gnutls_datum_t * @var{hash}, gnutls_datum_t * @var{signature})
@var{key}: Holds the key

@var{hash}: holds the data to be signed

@var{signature}: will contain newly allocated signature

This function is no-op.

@strong{Returns:} @code{GNUTLS_E_UNIMPLEMENTED_FEATURE} .
@end deftypefun