gnutls_x509_crt_check_hostname(3) — Linux manual page

gnutls_x509_crt_check_hostname(3) gnutlsgnutls_x509_crt_check_hostname(3)

NAME         top

       gnutls_x509_crt_check_hostname - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       unsigned gnutls_x509_crt_check_hostname(gnutls_x509_crt_t cert,
       const char * hostname);

ARGUMENTS         top

       gnutls_x509_crt_t cert
                   should contain an gnutls_x509_crt_t type

       const char * hostname
                   A null terminated string that contains a DNS name

DESCRIPTION         top

       This function will check if the given certificate's subject
       matches the given hostname.  This is a basic implementation of the
       matching described in RFC6125, and takes into account wildcards,
       and the DNSName/IPAddress subject alternative name PKIX extension.

       For details see also gnutls_x509_crt_check_hostname2().

RETURNS         top

       non-zero for a successful match, and zero on failure.

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                            3.8.10gnutls_x509_crt_check_hostname(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.