@deftypefun {int} {gnutls_x509_crt_set_basic_constraints} (gnutls_x509_crt_t @var{crt}, unsigned int @var{ca}, int @var{pathLenConstraint})
@var{crt}: a certificate of type @code{gnutls_x509_crt_t} 

@var{ca}: true(1) or false(0). Depending on the Certificate authority status.

@var{pathLenConstraint}: non-negative error codes indicate maximum length of path,
and negative error codes indicate that the pathLenConstraints field should
not be present.

This function will set the basicConstraints certificate extension.

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