release/src/router/nettle/ecdsa.h

   1 /* ecdsa.h */
   2
   3 /* nettle, low-level cryptographics library
   4  *
   5  * Copyright (C) 2013 Niels Möller
   6  *
   7  * The nettle library is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU Lesser General Public License as published by
   9  * the Free Software Foundation; either version 2.1 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * The nettle library is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA 02111-1301, USA.
  21  */
  22
  23 /* Development of Nettle's ECC support was funded by the .SE Internet Fund. */
  24
  25 #ifndef NETTLE_ECDSA_H_INCLUDED
  26 #define NETTLE_ECDSA_H_INCLUDED
  27
  28 #include "ecc.h"
  29 #include "dsa.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /* Name mangling */
  36 #define ecdsa_sign nettle_ecdsa_sign
  37 #define ecdsa_verify nettle_ecdsa_verify
  38 #define ecdsa_generate_keypair nettle_ecdsa_generate_keypair
  39 #define ecc_ecdsa_sign nettle_ecc_ecdsa_sign
  40 #define ecc_ecdsa_sign_itch nettle_ecc_ecdsa_sign_itch
  41 #define ecc_ecdsa_verify nettle_ecc_ecdsa_verify
  42 #define ecc_ecdsa_verify_itch nettle_ecc_ecdsa_verify_itch
  43
  44 /* High level ECDSA functions.
  45  *
  46  * A public key is represented as a struct ecc_point, and a private
  47  * key as a struct ecc_scalar. FIXME: Introduce some aliases? */
  48 void
  49 ecdsa_sign (const struct ecc_scalar *key,
  50             void *random_ctx, nettle_random_func *random,
  51             unsigned digest_length,
  52             const uint8_t *digest,
  53             struct dsa_signature *signature);
  54
  55 int
  56 ecdsa_verify (const struct ecc_point *pub,
  57               unsigned length, const uint8_t *digest,
  58               const struct dsa_signature *signature);
  59
  60 void
  61 ecdsa_generate_keypair (struct ecc_point *pub,
  62                         struct ecc_scalar *key,
  63                         void *random_ctx, nettle_random_func *random);
  64
  65 /* Low-level ECDSA functions. */
  66 mp_size_t
  67 ecc_ecdsa_sign_itch (const struct ecc_curve *ecc);
  68
  69 void
  70 ecc_ecdsa_sign (const struct ecc_curve *ecc,
  71                 const mp_limb_t *zp,
  72                 /* Random nonce, must be invertible mod ecc group
  73                    order. */
  74                 const mp_limb_t *kp,
  75                 unsigned length, const uint8_t *digest,
  76                 mp_limb_t *rp, mp_limb_t *sp,
  77                 mp_limb_t *scratch);
  78
  79 mp_size_t
  80 ecc_ecdsa_verify_itch (const struct ecc_curve *ecc);
  81
  82 int
  83 ecc_ecdsa_verify (const struct ecc_curve *ecc,
  84                   const mp_limb_t *pp, /* Public key */
  85                   unsigned length, const uint8_t *digest,
  86                   const mp_limb_t *rp, const mp_limb_t *sp,
  87                   mp_limb_t *scratch);
  88
  89
  90 #ifdef __cplusplus
  91 }
  92 #endif
  93
  94 #endif /* NETTLE_ECDSA_H_INCLUDED */