gnutls_hkdf_expand3
Api function
Usage
#include <gnutls/crypto.h>
int gnutls_hkdf_expand(gnutls_mac_algorithm_t mac, const gnutls_datum_t * key, const gnutls_datum_t * info, void * output, size_t length);
Arguments
gnutls_mac_algorithm_t mac
|
the mac algorithm used internally |
|---|---|
const gnutls_datum_t * key
|
the pseudorandom key created with HKDF-Extract |
const gnutls_datum_t * info
|
the optional informational data |
void * output
|
the output value of the expand operation |
size_t length
|
the desired length of the output key |
Overview
This function will derive a variable length keying material from the pseudorandom key using the HKDF-Expand 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.