Mercurial > dropbear
view libtommath/bn_mp_rand.c @ 1692:1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
* update C files
* update other files
* update headers
* update makefiles
* remove mp_set/get_double()
* use ltm 1.2.0 API
* update ltm_desc
* use bundled tommath if system-tommath is too old
* XMALLOC etc. were changed to MP_MALLOC etc.
author | Steffen Jaeckel <s@jaeckel.eu> |
---|---|
date | Tue, 26 May 2020 17:36:47 +0200 |
parents | f52919ffd3b1 |
children | 34d9d3c022ce |
line wrap: on
line source
#include "tommath_private.h" #ifdef BN_MP_RAND_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ mp_err(*s_mp_rand_source)(void *out, size_t size) = s_mp_rand_platform; void mp_rand_source(mp_err(*source)(void *out, size_t size)) { s_mp_rand_source = (source == NULL) ? s_mp_rand_platform : source; } mp_err mp_rand(mp_int *a, int digits) { int i; mp_err err; mp_zero(a); if (digits <= 0) { return MP_OKAY; } if ((err = mp_grow(a, digits)) != MP_OKAY) { return err; } if ((err = s_mp_rand_source(a->dp, (size_t)digits * sizeof(mp_digit))) != MP_OKAY) { return err; } /* TODO: We ensure that the highest digit is nonzero. Should this be removed? */ while ((a->dp[digits - 1] & MP_MASK) == 0u) { if ((err = s_mp_rand_source(a->dp + digits - 1, sizeof(mp_digit))) != MP_OKAY) { return err; } } a->used = digits; for (i = 0; i < digits; ++i) { a->dp[i] &= MP_MASK; } return MP_OKAY; } #endif