@deftypefun {int} {gnutls_pkcs12_bag_get_key_id} (gnutls_pkcs12_bag_t @var{bag}, unsigned @var{indx}, gnutls_datum_t * @var{id})
@var{bag}: The bag

@var{indx}: The bag's element to add the id

@var{id}: where the ID will be copied (to be treated as const)

This function will return the key ID, of the specified bag element.
The key ID is usually used to distinguish the local private key and
the certificate pair.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value. or a negative error code on error.
@end deftypefun