@deftypefun {int} {gnutls_x509_crt_set_crq_extension_by_oid} (gnutls_x509_crt_t @var{crt}, gnutls_x509_crq_t @var{crq}, const char * @var{oid}, unsigned @var{flags})
@var{crt}: a certificate of type @code{gnutls_x509_crt_t} 

@var{crq}: holds a certificate request

@var{oid}: the object identifier of the OID to copy

@var{flags}: should be zero

This function will set the extension specify by  @code{oid} from the given request to the
certificate.

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

@strong{Since:} 3.5.1
@end deftypefun