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view libtommath/bn_mp_submod.c @ 1832:a974a80f5f44
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author | Matt Johnston <matt@codeconstruct.com.au> |
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date | Tue, 12 Oct 2021 21:29:42 +0800 |
parents | 1051e4eea25a |
children |
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#include "tommath_private.h" #ifdef BN_MP_SUBMOD_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* d = a - b (mod c) */ mp_err mp_submod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d) { mp_err err; mp_int t; if ((err = mp_init(&t)) != MP_OKAY) { return err; } if ((err = mp_sub(a, b, &t)) != MP_OKAY) { goto LBL_ERR; } err = mp_mod(&t, c, d); LBL_ERR: mp_clear(&t); return err; } #endif