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       gnutls_x509_crt_get_issuer_dn_by_oid   -   This  function  returns  the
       Certificate’s issuer distinguished name


       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_issuer_dn_by_oid(gnutls_x509_crt_t cert,  const
       char  *  oid,  int  indx,  unsigned  int raw_flag, void * buf, size_t *


       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t structure

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

       int indx    In case multiple same OIDs exist in the RDN, this specifies
                   which to send. Use zero to get the first one.

       unsigned int raw_flag
                   If non zero returns the raw DER data of the DN part.

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

       size_t * sizeof_buf
                   initially holds the size of buf


       This  function  will  extract  the  part of the name of the Certificate
       issuer specified by the given OID. The output, if the raw flag  is  not
       used,  will  be  encoded as described in RFC2253. Thus a string that is
       ASCII or UTF-8 encoded, depending on the certificate data.

       Some helper macros with popular OIDs can be found in  gnutls/x509.h  If
       raw  flag  is  zero, this function will only return known OIDs as text.
       Other OIDs will be DER encoded, as  described  in  RFC2253  --  in  hex
       format with a ’using gnutls_x509_dn_oid_known().

       If buf is null then only the size will be filled.


       GNUTLS_E_SHORT_MEMORY_BUFFER if the provided buffer is not long enough,
       and in that case the *sizeof_buf will  be  updated  with  the  required
       size.  On success 0 is returned.


       Report    bugs    to    <>.     GnuTLS   home   page: General help  using  GNU  software:


       Copyright © 2008 Free Software Foundation.
       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.


       The  full  documentation  for gnutls is maintained as a Texinfo manual.
       If the info and gnutls programs are properly installed  at  your  site,
       the command

              info gnutls

       should give you access to the complete manual.

gnutls                               2.gnutls_x509_crt_get_issuer_dn_by_oid(3)