@deftypefun {int} {gnutls_x509_crt_set_subject_alternative_name} (gnutls_x509_crt_t @var{crt}, gnutls_x509_subject_alt_name_t           @var{type}, const char * @var{data_string})
@var{crt}: a certificate of type @code{gnutls_x509_crt_t} 

@var{type}: is one of the gnutls_x509_subject_alt_name_t enumerations

@var{data_string}: The data to be set, a (0) terminated string

This function will set the subject alternative name certificate
extension. This function assumes that data can be expressed as a null
terminated string.

The name of the function is unfortunate since it is inconsistent with
@code{gnutls_x509_crt_get_subject_alt_name()} .

See @code{gnutls_x509_crt_set_subject_alt_name()}  for more information.

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