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gnutls_x509_crt_get_extension_by_oid(3)                                 gnutls

NAME
       gnutls_x509_crt_get_extension_by_oid - API function

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

REPORTING BUGS
       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT
       Copyright (C) 2001- 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
       The full documentation for gnutls is maintained as a Texinfo manual.
       If the /usr/local/share/doc/gnutls/ directory does not contain the HTML
       form visit

       https://www.gnutls.org/manual/

gnutls                               3.7.9
                                       gnutls_x509_crt_get_extension_by_oid(3)