diff options
Diffstat (limited to 'lib/hcrypto/libtommath/bn_mp_mod.c')
-rw-r--r-- | lib/hcrypto/libtommath/bn_mp_mod.c | 59 |
1 files changed, 21 insertions, 38 deletions
diff --git a/lib/hcrypto/libtommath/bn_mp_mod.c b/lib/hcrypto/libtommath/bn_mp_mod.c index 757335aebc5b..8fbfe08dcde0 100644 --- a/lib/hcrypto/libtommath/bn_mp_mod.c +++ b/lib/hcrypto/libtommath/bn_mp_mod.c @@ -1,48 +1,31 @@ -#include <tommath.h> +#include "tommath_private.h" #ifdef BN_MP_MOD_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. - * - * The library is free for all purposes without any express - * guarantee it works. - * - * Tom St Denis, tomstdenis@gmail.com, http://libtom.org - */ +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ /* c = a mod b, 0 <= c < b if b > 0, b < c <= 0 if b < 0 */ -int -mp_mod (mp_int * a, mp_int * b, mp_int * c) +mp_err mp_mod(const mp_int *a, const mp_int *b, mp_int *c) { - mp_int t; - int res; + mp_int t; + mp_err err; - if ((res = mp_init (&t)) != MP_OKAY) { - return res; - } + if ((err = mp_init_size(&t, b->used)) != MP_OKAY) { + return err; + } - if ((res = mp_div (a, b, NULL, &t)) != MP_OKAY) { - mp_clear (&t); - return res; - } + if ((err = mp_div(a, b, NULL, &t)) != MP_OKAY) { + goto LBL_ERR; + } - if (mp_iszero(&t) || t.sign == b->sign) { - res = MP_OKAY; - mp_exch (&t, c); - } else { - res = mp_add (b, &t, c); - } + if (MP_IS_ZERO(&t) || (t.sign == b->sign)) { + err = MP_OKAY; + mp_exch(&t, c); + } else { + err = mp_add(b, &t, c); + } - mp_clear (&t); - return res; +LBL_ERR: + mp_clear(&t); + return err; } #endif - -/* $Source: /cvs/libtom/libtommath/bn_mp_mod.c,v $ */ -/* $Revision: 1.4 $ */ -/* $Date: 2006/12/28 01:25:13 $ */ |