95 lines
3.7 KiB
C
95 lines
3.7 KiB
C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#ifndef TOMMATH_PRIV_H_
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#define TOMMATH_PRIV_H_
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#include "tommath.h"
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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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#ifdef __cplusplus
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extern "C" {
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#endif
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/* define heap macros */
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#ifndef XMALLOC
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/* default to libc stuff */
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# define XMALLOC(size) malloc(size)
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# define XREALLOC(mem, oldsize, newsize) realloc(mem, newsize)
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# define XCALLOC(nmemb, size) calloc(nmemb, size)
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# define XFREE(mem, size) free(mem)
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#else
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/* prototypes for our heap functions */
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extern void *XMALLOC(size_t size);
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extern void *XREALLOC(void *mem, size_t oldsize, size_t newsize);
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extern void *XCALLOC(size_t nmemb, size_t size);
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extern void XFREE(void *mem, size_t size);
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#endif
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/* ---> Basic Manipulations <--- */
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#define IS_ZERO(a) ((a)->used == 0)
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#define IS_EVEN(a) (((a)->used == 0) || (((a)->dp[0] & 1u) == 0u))
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#define IS_ODD(a) (((a)->used > 0) && (((a)->dp[0] & 1u) == 1u))
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/* lowlevel functions, do not call! */
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int s_mp_add(const mp_int *a, const mp_int *b, mp_int *c);
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int s_mp_sub(const mp_int *a, const mp_int *b, mp_int *c);
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#define s_mp_mul(a, b, c) s_mp_mul_digs(a, b, c, (a)->used + (b)->used + 1)
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int fast_s_mp_mul_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
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int s_mp_mul_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
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int fast_s_mp_mul_high_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
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int s_mp_mul_high_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
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int fast_s_mp_sqr(const mp_int *a, mp_int *b);
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int s_mp_sqr(const mp_int *a, mp_int *b);
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int mp_karatsuba_mul(const mp_int *a, const mp_int *b, mp_int *c);
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int mp_toom_mul(const mp_int *a, const mp_int *b, mp_int *c);
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int mp_karatsuba_sqr(const mp_int *a, mp_int *b);
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int mp_toom_sqr(const mp_int *a, mp_int *b);
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int fast_mp_invmod(const mp_int *a, const mp_int *b, mp_int *c);
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int mp_invmod_slow(const mp_int *a, const mp_int *b, mp_int *c);
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int fast_mp_montgomery_reduce(mp_int *x, const mp_int *n, mp_digit rho);
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int mp_exptmod_fast(const mp_int *G, const mp_int *X, const mp_int *P, mp_int *Y, int redmode);
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int s_mp_exptmod(const mp_int *G, const mp_int *X, const mp_int *P, mp_int *Y, int redmode);
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void bn_reverse(unsigned char *s, int len);
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extern const char *const mp_s_rmap;
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extern const uint8_t mp_s_rmap_reverse[];
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extern const size_t mp_s_rmap_reverse_sz;
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/* Fancy macro to set an MPI from another type.
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* There are several things assumed:
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* x is the counter
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* a is the pointer to the MPI
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* b is the original value that should be set in the MPI.
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*/
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#define MP_SET_XLONG(func_name, type) \
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int func_name (mp_int * a, type b) \
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{ \
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int x = 0; \
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int new_size = (((CHAR_BIT * sizeof(type)) + DIGIT_BIT) - 1) / DIGIT_BIT; \
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int res = mp_grow(a, new_size); \
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if (res == MP_OKAY) { \
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mp_zero(a); \
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while (b != 0u) { \
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a->dp[x++] = ((mp_digit)b & MP_MASK); \
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if ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT) { break; } \
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b >>= ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT ? 0 : DIGIT_BIT); \
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} \
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a->used = x; \
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} \
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return res; \
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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