@deftypefun {int} {gnutls_x509_key_purpose_set} (gnutls_x509_key_purposes_t @var{p}, const char * @var{oid})
@var{p}: The key purposes

@var{oid}: The object identifier of the key purpose

This function will store the specified key purpose in the
purposes.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0), otherwise a negative error value.

@strong{Since:} 3.3.0
@end deftypefun