Mercurial > dropbear
view libtommath/bn_mp_mulmod.c @ 1689:d2d3b5ba6c64
update travis to Ubuntu focal to provide chacha20
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 26 May 2020 23:13:48 +0800 |
parents | f52919ffd3b1 |
children | 1051e4eea25a |
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#include "tommath_private.h" #ifdef BN_MP_MULMOD_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * SPDX-License-Identifier: Unlicense */ /* d = a * b (mod c) */ int mp_mulmod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d) { int res; mp_int t; if ((res = mp_init_size(&t, c->used)) != MP_OKAY) { return res; } if ((res = mp_mul(a, b, &t)) != MP_OKAY) { mp_clear(&t); return res; } res = mp_mod(&t, c, d); mp_clear(&t); return res; } #endif /* ref: HEAD -> master, tag: v1.1.0 */ /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ /* commit time: 2019-01-28 20:32:32 +0100 */