---
name: "gnutls_x509_crq_get_dn_by_oid"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_x509_crq_get_dn_by_oid"
---

# gnutls\_x509\_crq\_get\_dn\_by\_oid(3)

API function

## NAME

gnutls\_x509\_crq\_get\_dn\_by\_oid - API function

## SYNOPSIS

**#include \<gnutls/x509.h\>**

**int gnutls\_x509\_crq\_get\_dn\_by\_oid(gnutls\_x509\_crq\_t** *crq***, const char \*** *oid***, unsigned** *indx***, unsigned int** *raw\_flag***, void \*** *buf***, size\_t \*** *buf\_size***);**

## ARGUMENTS

- gnutls\_x509\_crq\_t crq

  should contain a gnutls\_x509\_crq\_t type

- const char \* oid

  holds an Object Identifier in a null terminated string

- unsigned indx

  In case multiple same OIDs exist in the RDN, this specifies which to get. 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 to a structure to hold the name (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 request subject, specified by the given OID. The output will be encoded as described in RFC2253. The output string will be 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 RFC2253 -- in hex format with a ' using **gnutls\_x509\_dn\_oid\_known()**.

## 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.  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/