gnutls_hkdf_extract(3)

gnutls_hkdf_extract3

Api function

Usage

#include <gnutls/crypto.h>

int gnutls_hkdf_extract(gnutls_mac_algorithm_t mac, const gnutls_datum_t * key, const gnutls_datum_t * salt, void * output);

Arguments

gnutls_mac_algorithm_t mac

the mac algorithm used internally

const gnutls_datum_t * key

the initial keying material

const gnutls_datum_t * salt

the optional salt

void * output

the output value of the extract operation

Overview

This function will derive a fixed-size key using the HKDF-Extract function as defined in RFC 5869.

Returns

Zero or a negative error code on error.

Since

3.6.13

Releases

4 releases since Debian 11 (Bullseye); the text changed 3 times.

  1. 11
  2. 12
  3. 13
  4. Arch

Reporting bugs

Report bugs to <[email protected]>.
Home page: https://www.gnutls.org

From gnutls 3.8.13-3 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.