@deftypefun {int} {gnutls_certificate_set_x509_crl} (gnutls_certificate_credentials_t @var{res}, gnutls_x509_crl_t * @var{crl_list}, int @var{crl_list_size}) @var{res}: is a @code{gnutls_certificate_credentials_t} type. @var{crl_list}: is a list of trusted CRLs. They should have been verified before. @var{crl_list_size}: holds the size of the crl_list 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. @strong{Since:} 2.4.0 @end deftypefun