NAME         top

       gnutls_x509_crq_get_extension_by_oid - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_crq_get_extension_by_oid(gnutls_x509_crq_t crq, const
       char * oid, unsigned indx, void * buf, size_t * buf_size, unsigned
       int * critical);

ARGUMENTS         top

       gnutls_x509_crq_t crq
                   should contain a gnutls_x509_crq_t type

       const char * oid
                   holds an Object Identifier in a null terminated string

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

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

       size_t * buf_size
                   initially holds the size of  buf

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

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 in case of an error.  If the certificate does not contain
       the specified extension GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be

SINCE         top


REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2019 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-3.6.9.tar.xz fetched from
       ⟨⟩ on 2020-02-08.  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

gnutls                              3.g6n.u9tls_x509_crq_get_extension_by_oid(3)