---
name: "gnutls_dh_params_export_pkcs3"
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_dh_params_export_pkcs3"
---

# gnutls\_dh\_params\_export\_pkcs3(3)

API function

## NAME

gnutls\_dh\_params\_export\_pkcs3 - API function

## SYNOPSIS

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

**int gnutls\_dh\_params\_export\_pkcs3(gnutls\_dh\_params\_t** *params***, gnutls\_x509\_crt\_fmt\_t** *format***, unsigned char \*** *params\_data***, size\_t \*** *params\_data\_size***);**

## ARGUMENTS

- gnutls\_dh\_params\_t params

  Holds the DH parameters

- gnutls\_x509\_crt\_fmt\_t format

  the format of output params. One of PEM or DER.

- unsigned char \* params\_data

  will contain a PKCS3 DHParams structure PEM or DER encoded

- size\_t \* params\_data\_size

  holds the size of params\_data (and will be replaced by the actual size of parameters)

## DESCRIPTION

This function will export the given dh parameters to a PKCS3 DHParams structure. This is the format generated by "openssl dhparam" tool. If the buffer provided is not long enough to hold the output, then GNUTLS\_E\_SHORT\_MEMORY\_BUFFER will be returned.

If the structure is PEM encoded, it will have a header of "BEGIN DH PARAMETERS".

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error code 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/