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.

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/