release/src/router/nettle/hmac-sha256.c

   1 /* hmac-sha256.c
   2  *
   3  * HMAC-SHA256 message authentication code.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2003 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 "hmac.h"
  31
  32 void
  33 hmac_sha256_set_key(struct hmac_sha256_ctx *ctx,
  34                     unsigned key_length, const uint8_t *key)
  35 {
  36   HMAC_SET_KEY(ctx, &nettle_sha256, key_length, key);
  37 }
  38
  39 void
  40 hmac_sha256_update(struct hmac_sha256_ctx *ctx,
  41                    unsigned length, const uint8_t *data)
  42 {
  43   sha256_update(&ctx->state, length, data);
  44 }
  45
  46 void
  47 hmac_sha256_digest(struct hmac_sha256_ctx *ctx,
  48                    unsigned length, uint8_t *digest)
  49 {
  50   HMAC_DIGEST(ctx, &nettle_sha256, length, digest);
  51 }