NAME

       gnutls_x509_crt_check_hostname2 - API function

SYNOPSIS

       #include <gnutls/x509.h>

       unsigned  gnutls_x509_crt_check_hostname2(gnutls_x509_crt_t  cert,  const  char  * hostname, unsigned int
       flags);

ARGUMENTS

       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

       unsigned int flags
                   gnutls_certificate_verify_flags

DESCRIPTION

       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.

       IPv4 addresses are accepted by this function in the dotted-decimal  format  (e.g,  ddd.ddd.ddd.ddd),  and
       IPv6 addresses in the hexadecimal x:x:x:x:x:x:x:x format. For them the IPAddress subject alternative name
       extension  is  consulted. Previous versions to 3.6.0 of GnuTLS in case of a non-match would consult (in a
       non-standard extension) the DNSname and CN fields. This is no longer the case.

       When the flag GNUTLS_VERIFY_DO_NOT_ALLOW_WILDCARDS is specified no wildcards  are  considered.  Otherwise
       they are only considered if the domain name consists of three components or more, and the wildcard starts
       at the leftmost position.

       The function gnutls_x509_crt_check_ip() is available for matching IP addresses.

RETURNS

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

SINCE

       3.3.0

REPORTING BUGS

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

COPYRIGHT

       Copyright © 2001-2022 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

       http://www.gnutls.org/manual/

gnutls                                               3.5.18                   gnutls_x509_crt_check_hostname2(3)