@deftypefun {int} {gnutls_certificate_set_x509_crl_mem} (gnutls_certificate_credentials_t @var{res}, const gnutls_datum_t * @var{CRL}, gnutls_x509_crt_fmt_t @var{type})
@var{res}: is a @code{gnutls_certificate_credentials_t}  type.

@var{CRL}: is a list of trusted CRLs. They should have been verified before.

@var{type}: is DER or PEM

This function adds the trusted CRLs in order to verify client or
server certificates.  In case of a client this is not required to
be called if the certificates are not verified using
@code{gnutls_certificate_verify_peers2()} .  This function may be called
multiple times.

@strong{Returns:} number of CRLs processed, or a negative error code on error.
@end deftypefun