1 | /* wolfmath.h
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2 | *
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3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 |
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22 | #ifndef __WOLFMATH_H__
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23 | #define __WOLFMATH_H__
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24 |
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25 | #ifdef __cplusplus
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26 | extern "C" {
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27 | #endif
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28 |
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29 | #ifdef WOLFSSL_PUBLIC_MP
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30 | #define MP_API WOLFSSL_API
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31 | #else
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32 | #define MP_API WOLFSSL_LOCAL
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33 | #endif
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34 |
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35 | #ifndef MIN
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36 | #define MIN(x,y) ((x)<(y)?(x):(y))
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37 | #endif
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38 |
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39 | #ifndef MAX
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40 | #define MAX(x,y) ((x)>(y)?(x):(y))
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41 | #endif
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42 |
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43 | /* timing resistance array */
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44 | #if !defined(WC_NO_CACHE_RESISTANT) && \
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45 | ((defined(HAVE_ECC) && defined(ECC_TIMING_RESISTANT)) || \
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46 | (defined(USE_FAST_MATH) && defined(TFM_TIMING_RESISTANT)))
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47 |
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48 | extern const wolfssl_word wc_off_on_addr[2];
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49 | #endif
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50 |
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51 |
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52 | /* common math functions */
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53 | MP_API int get_digit_count(mp_int* a);
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54 | MP_API mp_digit get_digit(mp_int* a, int n);
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55 | MP_API int get_rand_digit(WC_RNG* rng, mp_digit* d);
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56 |
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57 | WOLFSSL_API int mp_cond_copy(mp_int* a, int copy, mp_int* b);
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58 | WOLFSSL_API int mp_rand(mp_int* a, int digits, WC_RNG* rng);
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59 |
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60 | enum {
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61 | /* format type */
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62 | WC_TYPE_HEX_STR = 1,
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63 | WC_TYPE_UNSIGNED_BIN = 2,
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64 | };
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65 |
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66 | WOLFSSL_API int wc_export_int(mp_int* mp, byte* buf, word32* len,
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67 | word32 keySz, int encType);
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68 |
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69 | #ifdef HAVE_WOLF_BIGINT
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70 | #if !defined(WOLF_BIGINT_DEFINED)
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71 | /* raw big integer */
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72 | typedef struct WC_BIGINT {
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73 | byte* buf;
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74 | word32 len;
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75 | void* heap;
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76 | } WC_BIGINT;
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77 | #define WOLF_BIGINT_DEFINED
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78 | #endif
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79 |
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80 | WOLFSSL_LOCAL void wc_bigint_init(WC_BIGINT* a);
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81 | WOLFSSL_LOCAL int wc_bigint_alloc(WC_BIGINT* a, word32 sz);
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82 | WOLFSSL_LOCAL int wc_bigint_from_unsigned_bin(WC_BIGINT* a, const byte* in, word32 inlen);
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83 | WOLFSSL_LOCAL int wc_bigint_to_unsigned_bin(WC_BIGINT* a, byte* out, word32* outlen);
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84 | WOLFSSL_LOCAL void wc_bigint_zero(WC_BIGINT* a);
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85 | WOLFSSL_LOCAL void wc_bigint_free(WC_BIGINT* a);
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86 |
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87 | WOLFSSL_LOCAL int wc_mp_to_bigint(mp_int* src, WC_BIGINT* dst);
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88 | WOLFSSL_LOCAL int wc_mp_to_bigint_sz(mp_int* src, WC_BIGINT* dst, word32 sz);
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89 | WOLFSSL_LOCAL int wc_bigint_to_mp(WC_BIGINT* src, mp_int* dst);
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90 | #endif /* HAVE_WOLF_BIGINT */
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91 |
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92 |
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93 | #ifdef __cplusplus
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94 | } /* extern "C" */
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95 | #endif
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96 |
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97 | #endif /* __WOLFMATH_H__ */
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