NAME

gnutls_hkdf_expand - API function

SYNOPSIS

#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

DESCRIPTION

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

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.