gnutls_x509_crt_get_extension_by_oid2(3) — Linux manual page


gnutls_x509_...nsion_by_oid2(3)  gnutls  gnutls_x509_...nsion_by_oid2(3)

NAME         top

       gnutls_x509_crt_get_extension_by_oid2 - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_extension_by_oid2(gnutls_x509_crt_t cert,
       const char * oid, unsigned indx, gnutls_datum_t * output,
       unsigned int * critical);

ARGUMENTS         top

       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       const char * oid
                   holds an Object Identified in null terminated string

       unsigned indx
                   In case multiple same OIDs exist in the extensions,
                   this specifies which to send. Use (0) to get the
                   first one.

       gnutls_datum_t * output
                   will hold the allocated extension data

       unsigned int * critical
                   will be non-zero if the extension is marked as

DESCRIPTION         top

       This function will return the extension specified by the OID in
       the certificate.  The extensions will be returned as binary data
       DER encoded, in the provided buffer.

RETURNS         top

       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a
       negative error code is returned. If the certificate does not
       contain the specified extension

SINCE         top


REPORTING BUGS         top

       Report bugs to <>.
       Home page:

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

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
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       ⟨⟩ on 2023-12-22.  If you
       discover any rendering problems in this HTML version of the page,
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gnutls                            3.8.2  gnutls_x509_...nsion_by_oid2(3)