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/* curve448.h
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* Implemented to: RFC 7748 */
#ifndef WOLF_CRYPT_CURVE448_H
#define WOLF_CRYPT_CURVE448_H
#include <wolfssl/wolfcrypt/types.h>
#ifdef HAVE_CURVE448
#include <wolfssl/wolfcrypt/fe_448.h>
#include <wolfssl/wolfcrypt/random.h>
#ifdef WOLFSSL_ASYNC_CRYPT
#include <wolfssl/wolfcrypt/async.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define CURVE448_KEY_SIZE 56
#define CURVE448_PUB_KEY_SIZE 56
/* A CURVE448 Key */
typedef struct curve448_key {
byte p[CURVE448_PUB_KEY_SIZE]; /* public key */
byte k[CURVE448_KEY_SIZE]; /* private key */
#ifdef WOLFSSL_ASYNC_CRYPT
WC_ASYNC_DEV asyncDev;
#endif
} curve448_key;
enum {
EC448_LITTLE_ENDIAN = 0,
EC448_BIG_ENDIAN = 1
};
WOLFSSL_API
int wc_curve448_make_key(WC_RNG* rng, int keysize, curve448_key* key);
WOLFSSL_API
int wc_curve448_shared_secret(curve448_key* private_key,
curve448_key* public_key,
byte* out, word32* outlen);
WOLFSSL_API
int wc_curve448_shared_secret_ex(curve448_key* private_key,
curve448_key* public_key,
byte* out, word32* outlen, int endian);
WOLFSSL_API
int wc_curve448_init(curve448_key* key);
WOLFSSL_API
void wc_curve448_free(curve448_key* key);
/* raw key helpers */
WOLFSSL_API
int wc_curve448_import_private(const byte* priv, word32 privSz,
curve448_key* key);
WOLFSSL_API
int wc_curve448_import_private_ex(const byte* priv, word32 privSz,
curve448_key* key, int endian);
WOLFSSL_API
int wc_curve448_import_private_raw(const byte* priv, word32 privSz,
const byte* pub, word32 pubSz,
curve448_key* key);
WOLFSSL_API
int wc_curve448_import_private_raw_ex(const byte* priv, word32 privSz,
const byte* pub, word32 pubSz,
curve448_key* key, int endian);
WOLFSSL_API
int wc_curve448_export_private_raw(curve448_key* key, byte* out,
word32* outLen);
WOLFSSL_API
int wc_curve448_export_private_raw_ex(curve448_key* key, byte* out,
word32* outLen, int endian);
WOLFSSL_API
int wc_curve448_import_public(const byte* in, word32 inLen,
curve448_key* key);
WOLFSSL_API
int wc_curve448_import_public_ex(const byte* in, word32 inLen,
curve448_key* key, int endian);
WOLFSSL_API
int wc_curve448_check_public(const byte* pub, word32 pubSz, int endian);
WOLFSSL_API
int wc_curve448_export_public(curve448_key* key, byte* out, word32* outLen);
WOLFSSL_API
int wc_curve448_export_public_ex(curve448_key* key, byte* out,
word32* outLen, int endian);
WOLFSSL_API
int wc_curve448_export_key_raw(curve448_key* key,
byte* priv, word32 *privSz,
byte* pub, word32 *pubSz);
WOLFSSL_API
int wc_curve448_export_key_raw_ex(curve448_key* key,
byte* priv, word32 *privSz,
byte* pub, word32 *pubSz,
int endian);
/* size helper */
WOLFSSL_API
int wc_curve448_size(curve448_key* key);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_CURVE448 */
#endif /* WOLF_CRYPT_CURVE448_H */
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