gnutls_hkdf_expand(3) gnutls gnutls_hkdf_expand(3)
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- 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 no-
tice 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/
gnutls 3.7.3 gnutls_hkdf_expand(3)
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