release/src/router/nettle/dsa-sha256-verify.c

   1 /* dsa-sha256-verify.c
   2  *
   3  * The DSA publickey algorithm, using SHA-256 (FIPS186-3).
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2010 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 <stdlib.h>
  31
  32 #include "dsa.h"
  33
  34 int
  35 dsa_sha256_verify_digest(const struct dsa_public_key *key,
  36                          const uint8_t *digest,
  37                          const struct dsa_signature *signature)
  38 {
  39   return _dsa_verify(key, SHA256_DIGEST_SIZE, digest, signature);
  40 }
  41
  42 int
  43 dsa_sha256_verify(const struct dsa_public_key *key,
  44                   struct sha256_ctx *hash,
  45                   const struct dsa_signature *signature)
  46 {
  47   uint8_t digest[SHA256_DIGEST_SIZE];
  48   sha256_digest(hash, sizeof(digest), digest);
  49
  50   return _dsa_verify(key, sizeof(digest), digest, signature);
  51 }