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: http://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2022 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/share/doc/gnutls/
       directory does not contain the HTML form visit

       http://www.gnutls.org/manual/