man7.org > Linux > man-pages

Linux/UNIX system programming training

gnutls_x509_crt_get_authority_key_gn_serial(3) — Linux manual page

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

gnutls_x509_c..._key_gn_serial(3) gnutlsgnutls_x509_c..._key_gn_serial(3)

NAME         top

       gnutls_x509_crt_get_authority_key_gn_serial - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_authority_key_gn_serial(gnutls_x509_crt_t
       cert, unsigned int seq, void * alt, size_t * alt_size, unsigned
       int * alt_type, void * serial, size_t * serial_size, unsigned int
       * critical);

ARGUMENTS         top

       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       unsigned int seq
                   specifies the sequence number of the alt name (0 for
                   the first one, 1 for the second etc.)

       void * alt  is the place where the alternative name will be copied
                   to

       size_t * alt_size
                   holds the size of alt.

       unsigned int * alt_type
                   holds the type of the alternative name (one of
                   gnutls_x509_subject_alt_name_t).

       void * serial
                   buffer to store the serial number (may be null)

       size_t * serial_size
                   Holds the size of the serial field (may be null)

       unsigned int * critical
                   will be non-zero if the extension is marked as
                   critical (may be null)

DESCRIPTION         top

       This function will return the X.509 authority key identifier when
       stored as a general name (authorityCertIssuer) and serial number.

       Because more than one general names might be stored
        seq can be used as a counter to request them all until
       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.

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

       3.0

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_c..._key_gn_serial(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