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/* fe448_448.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
*/
#ifndef WOLF_CRYPT_FE_448_H
#define WOLF_CRYPT_FE_448_H
#include <wolfssl/wolfcrypt/settings.h>
#if defined(HAVE_CURVE448) || defined(HAVE_ED448)
#include <stdint.h>
#include <wolfssl/wolfcrypt/types.h>
#if defined(HAVE___UINT128_T) && !defined(NO_CURVED448_128BIT)
#define CURVED448_128BIT
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* default to be faster but take more memory */
#if !defined(CURVE448_SMALL) || !defined(ED448_SMALL)
#if defined(CURVED448_128BIT)
typedef int64_t fe448;
#ifdef __SIZEOF_INT128__
typedef __uint128_t uint128_t;
typedef __int128_t int128_t;
#else
typedef unsigned long uint128_t __attribute__ ((mode(TI)));
typedef long int128_t __attribute__ ((mode(TI)));
#endif
#else
typedef int32_t fe448;
#endif
WOLFSSL_LOCAL void fe448_init(void);
WOLFSSL_LOCAL int curve448(byte* r, const byte* n, const byte* a);
#if !defined(CURVED448_128BIT)
WOLFSSL_LOCAL void fe448_reduce(fe448*);
#else
#define fe448_reduce(a)
#endif
WOLFSSL_LOCAL void fe448_neg(fe448*,const fe448*);
WOLFSSL_LOCAL void fe448_add(fe448*, const fe448*, const fe448*);
WOLFSSL_LOCAL void fe448_sub(fe448*, const fe448*, const fe448*);
WOLFSSL_LOCAL void fe448_mul(fe448*,const fe448*,const fe448*);
WOLFSSL_LOCAL void fe448_sqr(fe448*, const fe448*);
WOLFSSL_LOCAL void fe448_mul39081(fe448*, const fe448*);
WOLFSSL_LOCAL void fe448_invert(fe448*, const fe448*);
WOLFSSL_LOCAL void fe448_0(fe448*);
WOLFSSL_LOCAL void fe448_1(fe448*);
WOLFSSL_LOCAL void fe448_copy(fe448*, const fe448*);
WOLFSSL_LOCAL int fe448_isnonzero(const fe448*);
WOLFSSL_LOCAL int fe448_isnegative(const fe448*);
WOLFSSL_LOCAL void fe448_from_bytes(fe448*,const unsigned char *);
WOLFSSL_LOCAL void fe448_to_bytes(unsigned char *, const fe448*);
WOLFSSL_LOCAL void fe448_cmov(fe448*,const fe448*, int);
WOLFSSL_LOCAL void fe448_pow_2_446_222_1(fe448*,const fe448*);
#else
WOLFSSL_LOCAL void fe448_init(void);
WOLFSSL_LOCAL int curve448(byte* r, const byte* n, const byte* a);
#define fe448_reduce(a)
WOLFSSL_LOCAL void fe448_neg(uint8_t*,const uint8_t*);
WOLFSSL_LOCAL void fe448_add(uint8_t*, const uint8_t*, const uint8_t*);
WOLFSSL_LOCAL void fe448_sub(uint8_t*, const uint8_t*, const uint8_t*);
WOLFSSL_LOCAL void fe448_mul(uint8_t*,const uint8_t*,const uint8_t*);
WOLFSSL_LOCAL void fe448_sqr(uint8_t*, const uint8_t*);
WOLFSSL_LOCAL void fe448_mul39081(uint8_t*, const uint8_t*);
WOLFSSL_LOCAL void fe448_invert(uint8_t*, const uint8_t*);
WOLFSSL_LOCAL void fe448_copy(uint8_t*, const uint8_t*);
WOLFSSL_LOCAL int fe448_isnonzero(const uint8_t*);
WOLFSSL_LOCAL void fe448_norm(byte *a);
WOLFSSL_LOCAL void fe448_cmov(uint8_t*,const uint8_t*, int);
WOLFSSL_LOCAL void fe448_pow_2_446_222_1(uint8_t*,const uint8_t*);
#endif /* !CURVE448_SMALL || !ED448_SMALL */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_CURVE448 || HAVE_ED448 */
#endif /* WOLF_CRYPT_FE_448_H */
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