release/src/router/nettle/sha3-512.c

   1 /* sha3-512.c
   2  *
   3  * The sha3 hash function, 512 bit output.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2012 Niels Möller
   9  *
  10  * The nettle library is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or (at your
  13  * option) any later version.
  14  *
  15  * The nettle library is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  17  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  18  * License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  23  * MA 02111-1301, USA.
  24  */
  25
  26 #if HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <stddef.h>
  31 #include <string.h>
  32
  33 #include "sha3.h"
  34
  35 #include "nettle-write.h"
  36
  37 void
  38 sha3_512_init (struct sha3_512_ctx *ctx)
  39 {
  40   memset (&ctx->state, 0, offsetof (struct sha3_512_ctx, block));
  41 }
  42
  43 void
  44 sha3_512_update (struct sha3_512_ctx *ctx,
  45                  unsigned length,
  46                  const uint8_t *data)
  47 {
  48   ctx->index = _sha3_update (&ctx->state, SHA3_512_DATA_SIZE, ctx->block,
  49                              ctx->index, length, data);
  50 }
  51
  52 void
  53 sha3_512_digest(struct sha3_512_ctx *ctx,
  54                 unsigned length,
  55                 uint8_t *digest)
  56 {
  57   _sha3_pad (&ctx->state, SHA3_512_DATA_SIZE, ctx->block, ctx->index);
  58   _nettle_write_le64 (length, digest, ctx->state.a);
  59   sha3_512_init (ctx);
  60 }