@deftypefun {int} {gnutls_certificate_set_x509_crl_file} (gnutls_certificate_credentials_t @var{res}, const char * @var{crlfile}, gnutls_x509_crt_fmt_t @var{type})
@var{res}: is a @code{gnutls_certificate_credentials_t}  type.

@var{crlfile}: is a file containing the list of verified CRLs (DER or PEM list)

@var{type}: is PEM or DER

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