gnutls_x509_crt_get_extension_by_oid(3) — Linux manual page


gnutls_x509_c...ension_by_oid(3) gnutls gnutls_x509_c...ension_by_oid(3)

NAME         top

       gnutls_x509_crt_get_extension_by_oid - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t cert,
       const char * oid, unsigned indx, void * buf, size_t * buf_size,
       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.

       void * buf  a pointer to a structure to hold the name (may be

       size_t * buf_size
                   initially holds the size of  buf

       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

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

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       manual page, send it to  This page was obtained
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gnutls                            3.8.2 gnutls_x509_c...ension_by_oid(3)