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103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* wolfmath.h
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/*
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DESCRIPTION
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This library provides big integer math functions.
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*/
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#ifndef __WOLFMATH_H__
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#define __WOLFMATH_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef WOLFSSL_PUBLIC_MP
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#define MP_API WOLFSSL_API
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#else
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#define MP_API WOLFSSL_LOCAL
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#endif
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#ifndef MIN
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#define MIN(x,y) ((x)<(y)?(x):(y))
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#endif
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#ifndef MAX
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#define MAX(x,y) ((x)>(y)?(x):(y))
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#endif
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/* timing resistance array */
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#if !defined(WC_NO_CACHE_RESISTANT) && \
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((defined(HAVE_ECC) && defined(ECC_TIMING_RESISTANT)) || \
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(defined(USE_FAST_MATH) && defined(TFM_TIMING_RESISTANT)))
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extern const wolfssl_word wc_off_on_addr[2];
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#endif
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/* common math functions */
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MP_API int get_digit_count(mp_int* a);
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MP_API mp_digit get_digit(mp_int* a, int n);
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MP_API int get_rand_digit(WC_RNG* rng, mp_digit* d);
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WOLFSSL_API int mp_cond_copy(mp_int* a, int copy, mp_int* b);
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WOLFSSL_API int mp_rand(mp_int* a, int digits, WC_RNG* rng);
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enum {
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/* format type */
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WC_TYPE_HEX_STR = 1,
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WC_TYPE_UNSIGNED_BIN = 2,
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};
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WOLFSSL_API int wc_export_int(mp_int* mp, byte* buf, word32* len,
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word32 keySz, int encType);
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#ifdef HAVE_WOLF_BIGINT
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#if !defined(WOLF_BIGINT_DEFINED)
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/* raw big integer */
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typedef struct WC_BIGINT {
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byte* buf;
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word32 len;
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void* heap;
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} WC_BIGINT;
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#define WOLF_BIGINT_DEFINED
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#endif
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WOLFSSL_LOCAL void wc_bigint_init(WC_BIGINT* a);
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WOLFSSL_LOCAL int wc_bigint_alloc(WC_BIGINT* a, word32 sz);
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WOLFSSL_LOCAL int wc_bigint_from_unsigned_bin(WC_BIGINT* a, const byte* in, word32 inlen);
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WOLFSSL_LOCAL int wc_bigint_to_unsigned_bin(WC_BIGINT* a, byte* out, word32* outlen);
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WOLFSSL_LOCAL void wc_bigint_zero(WC_BIGINT* a);
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WOLFSSL_LOCAL void wc_bigint_free(WC_BIGINT* a);
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WOLFSSL_LOCAL int wc_mp_to_bigint(mp_int* src, WC_BIGINT* dst);
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WOLFSSL_LOCAL int wc_mp_to_bigint_sz(mp_int* src, WC_BIGINT* dst, word32 sz);
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WOLFSSL_LOCAL int wc_bigint_to_mp(WC_BIGINT* src, mp_int* dst);
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#endif /* HAVE_WOLF_BIGINT */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __WOLFMATH_H__ */
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