@deftypefun {int} {gnutls_system_key_add_x509} (gnutls_x509_crt_t @var{crt}, gnutls_x509_privkey_t @var{privkey}, const char * @var{label}, char ** @var{cert_url}, char ** @var{key_url})
@var{crt}: the certificate to be added

@var{privkey}: the key to be added

@var{label}: the friendly name to describe the key

@var{cert_url}: if non-NULL it will contain an allocated value with the certificate URL

@var{key_url}: if non-NULL it will contain an allocated value with the key URL

This function will added the given key and certificate pair,
to the system list.

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

@strong{Since:} 3.4.0
@end deftypefun