hkdf.h

   1 /* hkdf.h
   2
   3    TLS PRF code (RFC-5246, RFC-2246).
   4
   5    Copyright (C) 2017 Red Hat, Inc.
   6
   7    This file is part of GNU Nettle.
   8
   9    GNU Nettle is free software: you can redistribute it and/or
  10    modify it under the terms of either:
  11
  12      * the GNU Lesser General Public License as published by the Free
  13        Software Foundation; either version 3 of the License, or (at your
  14        option) any later version.
  15
  16    or
  17
  18      * the GNU General Public License as published by the Free
  19        Software Foundation; either version 2 of the License, or (at your
  20        option) any later version.
  21
  22    or both in parallel, as here.
  23
  24    GNU Nettle is distributed in the hope that it will be useful,
  25    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  27    General Public License for more details.
  28
  29    You should have received copies of the GNU General Public License and
  30    the GNU Lesser General Public License along with this program.  If
  31    not, see http://www.gnu.org/licenses/.
  32 */
  33
  34 #ifndef NETTLE_HKDF_H_INCLUDED
  35 #define NETTLE_HKDF_H_INCLUDED
  36
  37 #include "nettle-types.h"
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 /* Namespace mangling */
  44 #define hkdf_extract nettle_hkdf_extract
  45 #define hkdf_expand nettle_hkdf_expand
  46
  47 void
  48 hkdf_extract(void *mac_ctx,
  49              nettle_hash_update_func *update,
  50              nettle_hash_digest_func *digest,
  51              size_t digest_size,
  52              size_t secret_size, const uint8_t *secret,
  53              uint8_t *dst);
  54
  55 void
  56 hkdf_expand(void *mac_ctx,
  57             nettle_hash_update_func *update,
  58             nettle_hash_digest_func *digest,
  59             size_t digest_size,
  60             size_t info_size, const uint8_t *info,
  61             size_t length, uint8_t *dst);
  62
  63 #ifdef __cplusplus
  64 }
  65 #endif
  66
  67 #endif /* NETTLE_HKDF_H_INCLUDED */