gnutls_x509_crt_check_hostname(3)  gnutls  gnutls_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 <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2017 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 

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
       tarball gnutls-3.6.1.tar.xz fetched from
       ⟨⟩ on 2018-02-02.  If you discover
       any rendering problems in this HTML version of the page, or you
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gnutls                              3.6.1  gnutls_x509_crt_check_hostname(3)