siv-gcm-aes256.c

   1 /* siv-gcm-aes256.c
   2
   3    AES-GCM-SIV, RFC8452
   4
   5    Copyright (C) 2022 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 #if HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37
  38 #include "nettle-meta.h"
  39 #include "siv-gcm.h"
  40
  41 void
  42 siv_gcm_aes256_encrypt_message (const struct aes256_ctx *ctx,
  43                                 size_t nlength, const uint8_t *nonce,
  44                                 size_t alength, const uint8_t *adata,
  45                                 size_t clength, uint8_t *dst, const uint8_t *src)
  46 {
  47   struct aes256_ctx ctr_ctx;
  48   siv_gcm_encrypt_message (&nettle_aes256, ctx, &ctr_ctx,
  49                            nlength, nonce,
  50                            alength, adata,
  51                            clength, dst, src);
  52 }
  53
  54 int
  55 siv_gcm_aes256_decrypt_message (const struct aes256_ctx *ctx,
  56                                 size_t nlength, const uint8_t *nonce,
  57                                 size_t alength, const uint8_t *adata,
  58                                 size_t mlength, uint8_t *dst, const uint8_t *src)
  59 {
  60   struct aes256_ctx ctr_ctx;
  61   return siv_gcm_decrypt_message (&nettle_aes256, ctx, &ctr_ctx,
  62                                   nlength, nonce,
  63                                   alength, adata,
  64                                   mlength, dst, src);
  65 }