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/* ecdsa.h */
/* nettle, low-level cryptographics library
*
* Copyright (C) 2013 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
/* Development of Nettle's ECC support was funded by the .SE Internet Fund. */
#ifndef NETTLE_ECDSA_H_INCLUDED
#define NETTLE_ECDSA_H_INCLUDED
#include "ecc.h"
#include "dsa.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define ecdsa_sign nettle_ecdsa_sign
#define ecdsa_verify nettle_ecdsa_verify
#define ecdsa_generate_keypair nettle_ecdsa_generate_keypair
#define ecc_ecdsa_sign nettle_ecc_ecdsa_sign
#define ecc_ecdsa_sign_itch nettle_ecc_ecdsa_sign_itch
#define ecc_ecdsa_verify nettle_ecc_ecdsa_verify
#define ecc_ecdsa_verify_itch nettle_ecc_ecdsa_verify_itch
/* High level ECDSA functions.
*
* A public key is represented as a struct ecc_point, and a private
* key as a struct ecc_scalar. FIXME: Introduce some aliases? */
void
ecdsa_sign (const struct ecc_scalar *key,
void *random_ctx, nettle_random_func *random,
size_t digest_length,
const uint8_t *digest,
struct dsa_signature *signature);
int
ecdsa_verify (const struct ecc_point *pub,
size_t length, const uint8_t *digest,
const struct dsa_signature *signature);
void
ecdsa_generate_keypair (struct ecc_point *pub,
struct ecc_scalar *key,
void *random_ctx, nettle_random_func *random);
/* Low-level ECDSA functions. */
mp_size_t
ecc_ecdsa_sign_itch (const struct ecc_curve *ecc);
void
ecc_ecdsa_sign (const struct ecc_curve *ecc,
const mp_limb_t *zp,
/* Random nonce, must be invertible mod ecc group
order. */
const mp_limb_t *kp,
size_t length, const uint8_t *digest,
mp_limb_t *rp, mp_limb_t *sp,
mp_limb_t *scratch);
mp_size_t
ecc_ecdsa_verify_itch (const struct ecc_curve *ecc);
int
ecc_ecdsa_verify (const struct ecc_curve *ecc,
const mp_limb_t *pp, /* Public key */
size_t length, const uint8_t *digest,
const mp_limb_t *rp, const mp_limb_t *sp,
mp_limb_t *scratch);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_ECDSA_H_INCLUDED */
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