@deftypefun {int} {gnutls_x509_aki_get_id} (gnutls_x509_aki_t @var{aki}, gnutls_datum_t * @var{id})
@var{aki}: The authority key ID

@var{id}: Will hold the identifier

This function will return the key identifier as stored in
the  @code{aki} type. The identifier should be treated as constant.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, @code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE} 
if the index is out of bounds, otherwise a negative error value.

@strong{Since:} 3.3.0
@end deftypefun