NAME

gnutls_hpke_export - API function

SYNOPSIS

#include <gnutls/hpke.h>

int gnutls_hpke_export(gnutls_hpke_context_t ctx, const gnutls_datum_t * exporter_context, size_t length, gnutls_datum_t * secret);

ARGUMENTS

gnutls_hpke_context_t ctx: The HPKE context to use for exporting the secret.
const gnutls_datum_t * exporter_context: The application-specific context to be included in the export.
size_t length: The requested length in bytes of the secret to be exported.
gnutls_datum_t * secret: A pointer to a gnutls_datum_t structure where the exported secret will be stored.

DESCRIPTION

This function performs the export operation of HPKE. It derives a secret of length bytes from the exporter secret in the HPKE context, using the provided application-specific context and the KDF specified in the context. The resulting secret is stored in
secret . The function checks that the provided parameters are valid and that the context is properly initialized and that there is an exporter secret available in the context.

length should be a positive integer that does not exceed the maximum allowed size for HPKE exports.

The function will allocate memory for secret , and the caller is responsible for freeing this memory using gnutls_free() when it is no longer needed.

RETURNS

0 on success, or a negative error code on failure

SINCE

3.8.13

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.