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

# [NAME](#NAME)

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

# [SYNOPSIS](#SYNOPSIS)

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

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

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_x509\_tlsfeatures\_t feat](#gnutls_x509_tlsfeatures_t)

a set of TLSFeatures

[gnutls\_x509\_crt\_t cert](#gnutls_x509_crt_t)

the certificate to be checked

# [DESCRIPTION](#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](#RETURNS)

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

# [SINCE](#SINCE)

3.5.1

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_x509_tlsfeatures_check_crt(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls