man7.org > Linux > man-pages

Linux/UNIX system programming training

gnutls_x509_crt_get_ca_status(3) — Linux manual page

NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON 

gnutls_x509_crt_get_ca_status(3)  gnutls gnutls_x509_crt_get_ca_status(3)

NAME         top

       gnutls_x509_crt_get_ca_status - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_ca_status(gnutls_x509_crt_t cert, unsigned
       int * critical);

ARGUMENTS         top

       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       unsigned int * critical
                   will be non-zero if the extension is marked as
                   critical

DESCRIPTION         top

       This function will return certificates CA status, by reading the
       basicConstraints X.509 extension (2.5.29.19). If the certificate
       is a CA a positive value will be returned, or (0) if the
       certificate does not have CA flag set.

       Use gnutls_x509_crt_get_basic_constraints() if you want to read
       the pathLenConstraint field too.

RETURNS         top

       If the certificate is a CA a positive value will be returned, or
       (0) if the certificate does not have CA flag set.  A negative
       error code may be returned in case of errors.  If the certificate
       does not contain the basicConstraints extension
       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

REPORTING BUGS         top

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

COPYRIGHT         top

       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         top

       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/

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at
       ⟨http://www.gnutls.org/⟩.  If you have a bug report for this
       manual page, send it to bugs@gnutls.org.  This page was obtained
       from the tarball fetched from
       ⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for the
       page, or you have corrections or improvements to the information
       in this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

gnutls                            3.8.10 gnutls_x509_crt_get_ca_status(3)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI