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/* wolfmath.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 __WOLFMATH_H__
#define __WOLFMATH_H__
#ifdef __cplusplus
extern "C" {
#endif
#ifdef WOLFSSL_PUBLIC_MP
#define MP_API WOLFSSL_API
#else
#define MP_API WOLFSSL_LOCAL
#endif
#ifndef MIN
#define MIN(x,y) ((x)<(y)?(x):(y))
#endif
#ifndef MAX
#define MAX(x,y) ((x)>(y)?(x):(y))
#endif
/* timing resistance array */
#if !defined(WC_NO_CACHE_RESISTANT) && \
((defined(HAVE_ECC) && defined(ECC_TIMING_RESISTANT)) || \
(defined(USE_FAST_MATH) && defined(TFM_TIMING_RESISTANT)))
extern const wolfssl_word wc_off_on_addr[2];
#endif
/* common math functions */
MP_API int get_digit_count(mp_int* a);
MP_API mp_digit get_digit(mp_int* a, int n);
MP_API int get_rand_digit(WC_RNG* rng, mp_digit* d);
WOLFSSL_API int mp_cond_copy(mp_int* a, int copy, mp_int* b);
WOLFSSL_API int mp_rand(mp_int* a, int digits, WC_RNG* rng);
enum {
/* format type */
WC_TYPE_HEX_STR = 1,
WC_TYPE_UNSIGNED_BIN = 2,
};
WOLFSSL_API int wc_export_int(mp_int* mp, byte* buf, word32* len,
word32 keySz, int encType);
#ifdef HAVE_WOLF_BIGINT
#if !defined(WOLF_BIGINT_DEFINED)
/* raw big integer */
typedef struct WC_BIGINT {
byte* buf;
word32 len;
void* heap;
} WC_BIGINT;
#define WOLF_BIGINT_DEFINED
#endif
WOLFSSL_LOCAL void wc_bigint_init(WC_BIGINT* a);
WOLFSSL_LOCAL int wc_bigint_alloc(WC_BIGINT* a, word32 sz);
WOLFSSL_LOCAL int wc_bigint_from_unsigned_bin(WC_BIGINT* a, const byte* in, word32 inlen);
WOLFSSL_LOCAL int wc_bigint_to_unsigned_bin(WC_BIGINT* a, byte* out, word32* outlen);
WOLFSSL_LOCAL void wc_bigint_zero(WC_BIGINT* a);
WOLFSSL_LOCAL void wc_bigint_free(WC_BIGINT* a);
WOLFSSL_LOCAL int wc_mp_to_bigint(mp_int* src, WC_BIGINT* dst);
WOLFSSL_LOCAL int wc_mp_to_bigint_sz(mp_int* src, WC_BIGINT* dst, word32 sz);
WOLFSSL_LOCAL int wc_bigint_to_mp(WC_BIGINT* src, mp_int* dst);
#endif /* HAVE_WOLF_BIGINT */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __WOLFMATH_H__ */
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