---
name: "gnutls_x509_tlsfeatures_check_crt"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_x509_tlsfeatures_check_crt"
---

# gnutls\_x509\_tlsfeatures\_check\_crt(3)

API function

## NAME

gnutls\_x509\_tlsfeatures\_check\_crt - API function

## SYNOPSIS

**#include \<gnutls/x509.h\>**

**unsigned gnutls\_x509\_tlsfeatures\_check\_crt(gnutls\_x509\_tlsfeatures\_t** *feat***, gnutls\_x509\_crt\_t** *cert***);**

## ARGUMENTS

- gnutls\_x509\_tlsfeatures\_t feat

  a set of TLSFeatures

- gnutls\_x509\_crt\_t cert

  the certificate to be checked

## DESCRIPTION

This function will check the provided certificate against the TLSFeatures set in  *feat* using the RFC7633 p.4.2.2 rules. It will check whether the certificate contains the features in  *feat* or a superset.

## RETURNS

non-zero if the provided certificate complies, and zero otherwise.

## SINCE

3\.5.1

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 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.

## SEE ALSO

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

- https://www.gnutls.org/manual/