/* wolfmath.h
 *
 * Copyright (C) 2006-2017 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
 */

#if defined(HAVE_WOLF_BIGINT) && !defined(WOLF_BIGINT_DEFINED)
/* raw big integer */
typedef struct WC_BIGINT {
    byte * buf;
    word32 len;
    void * heap;
} WC_BIGINT;

# define WOLF_BIGINT_DEFINED
#endif


/* only define functions if mp_int has been declared */
#ifdef MP_INT_DEFINED

# ifndef __WOLFMATH_H__
#  define __WOLFMATH_H__

/* 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 */
int
get_digit_count(mp_int * a);
mp_digit
get_digit(mp_int * a, int n);
int
get_rand_digit(WC_RNG * rng, mp_digit * d);
int
mp_rand(mp_int * a, int digits, WC_RNG * rng);


#  ifdef HAVE_WOLF_BIGINT
void
wc_bigint_init(WC_BIGINT * a);
int
wc_bigint_alloc(WC_BIGINT * a, word32 sz);
int
wc_bigint_from_unsigned_bin(WC_BIGINT * a, const byte * in, word32 inlen);
int
wc_bigint_to_unsigned_bin(WC_BIGINT * a, byte * out, word32 * outlen);
void
wc_bigint_zero(WC_BIGINT * a);
void
wc_bigint_free(WC_BIGINT * a);

int
wc_mp_to_bigint(mp_int * src, WC_BIGINT * dst);
int
wc_bigint_to_mp(WC_BIGINT * src, mp_int * dst);
#  endif /* HAVE_WOLF_BIGINT */

# endif /* __WOLFMATH_H__ */

#endif /* MP_INT_DEFINED */
