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

   1 /* dsa-sha256-sign.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 "dsa.h"
  31
  32 int
  33 dsa_sha256_sign_digest(const struct dsa_public_key *pub,
  34                        const struct dsa_private_key *key,
  35                        void *random_ctx, nettle_random_func *random,
  36                        const uint8_t *digest,
  37                        struct dsa_signature *signature)
  38 {
  39   return _dsa_sign(pub, key, random_ctx, random,
  40                    SHA256_DIGEST_SIZE, digest, signature);
  41 }
  42
  43 int
  44 dsa_sha256_sign(const struct dsa_public_key *pub,
  45                 const struct dsa_private_key *key,
  46                 void *random_ctx, nettle_random_func *random,
  47                 struct sha256_ctx *hash,
  48                 struct dsa_signature *signature)
  49 {
  50   uint8_t digest[SHA256_DIGEST_SIZE];
  51   sha256_digest(hash, sizeof(digest), digest);
  52
  53   return _dsa_sign(pub, key, random_ctx, random,
  54                    sizeof(digest), digest, signature);
  55 }