NAME         top

       gnutls_x509_crt_get_name_constraints - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_name_constraints(gnutls_x509_crt_t crt,
       gnutls_x509_name_constraints_t nc, unsigned int flags, unsigned int *

ARGUMENTS         top

       gnutls_x509_crt_t crt
                   should contain a gnutls_x509_crt_t type

       gnutls_x509_name_constraints_t nc
                   The nameconstraints intermediate type

       unsigned int flags
                   zero or GNUTLS_EXT_FLAG_APPEND

       unsigned int * critical
                   the extension status

DESCRIPTION         top

       This function will return an intermediate type containing the name
       constraints of the provided CA certificate. That structure can be
       used in combination with gnutls_x509_name_constraints_check() to
       verify whether a server's name is in accordance with the constraints.

       When the  flags is set to GNUTLS_EXT_FLAG_APPEND, then if the  nc
       structure is empty this function will behave identically as if the
       flag was not set.  Otherwise if there are elements in the  nc
       structure then the constraints will be merged with the existing
       constraints following RFC5280 p6.1.4 (excluded constraints will be
       appended, permitted will be intersected).

       Note that  nc must be initialized prior to calling this function.

RETURNS         top

       On success, GNUTLS_E_SUCCESS (0) is returned,
       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE if the extension is not
       present, otherwise a negative error value.

SINCE         top


REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2018 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-3.6.2.tar.xz fetched from
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       any rendering problems in this HTML version of the page, or you
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gnutls                              3.g6n.u2tls_x509_crt_get_name_constraints(3)