gnutls_x509_crt_get_dn_by_oid man page on Archlinux

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gnutls_x509_crt_get_dn_by_oid(3)    gnutls    gnutls_x509_crt_get_dn_by_oid(3)

       gnutls_x509_crt_get_dn_by_oid - API function

       #include <gnutls/x509.h>

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

       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 (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

       This function will extract the part of the name of the Certificate sub‐
       ject 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  for‐
       mat  with  a  '#'  prefix.   You	 can  check  about  known  OIDs	 using

       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.

       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 cur‐
       rent index. On success 0 is returned.

       Report bugs to <>.
       Home page:

       Copyright © 2001-2014 Free Software Foundation, Inc..
       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 /usr/share/doc/gnutls/ directory does not contain the HTML form

gnutls				     3.3.1    gnutls_x509_crt_get_dn_by_oid(3)

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