NAME

       gnutls_x509_crt_get_dn_by_oid - API function

SYNOPSIS

       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_dn_by_oid(gnutls_x509_crt_t cert, const char * oid, unsigned indx,
       unsigned int raw_flag, void * buf, size_t * buf_size);

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 RDN, this specifies which to send. Use
                   (0) 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 where the DN part will be copied (may be null).

       size_t * buf_size
                   initially holds the size of  buf

DESCRIPTION

       This  function  will  extract the part of the name of the Certificate subject specified by
       the given OID. The output, if the raw flag is not used, will be encoded  as  described  in
       RFC4514. 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 (0),
       this function will only return known OIDs as text. Other OIDs  will  be  DER  encoded,  as
       described  in  RFC4514 -- in hex format with a '#' prefix.  You can check about known OIDs
       using gnutls_x509_dn_oid_known().

       If  buf is null then only the size will be filled. If the  raw_flag is not  specified  the
       output is always null terminated, although the
        buf_size will not include the null character.

RETURNS

       GNUTLS_E_SHORT_MEMORY_BUFFER  if  the provided buffer is not long enough, and in that case
       the      buf_size     will     be      updated      with      the      required      size.
       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE  if  there  are  no  data  in  the current index. On
       success 0 is returned.

REPORTING BUGS

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

COPYRIGHT

       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

       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

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