gnutls_x509_ext_import_name_constraints - API function
int gnutls_x509_ext_import_name_constraints(const gnutls_datum_t * ext, gnutls_x509_name_constraints_t nc, unsigned int flags);
This function will return an intermediate type containing the name constraints of the provided NameConstraints extension. That can be used in combination with gnutls_x509_name_constraints_check() to verify whether a server's name is in accordance with the constraints.
When the flags is set to GNUTLS_NAME_CONSTRAINTS_FLAG_APPEND, then if the nc type is empty this function will behave identically as if the flag was not set. Otherwise if there are elements in the nc structure then the constraints will be merged with the existing constraints following RFC5280 p6.1.4 (excluded constraints will be appended, permitted will be intersected).
Note that nc must be initialized prior to calling this function.
On success, GNUTLS_E_SUCCESS (0) is returned, GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE if the extension is not present, otherwise a negative error value.
Report bugs to <firstname.lastname@example.org>.
Home page: https://www.gnutls.org
Copyright © 2001- Free Software Foundation, Inc., and
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.
The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit