Mercurial > dropbear
diff libtommath/bn_mp_reduce_2k.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 |
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--- a/libtommath/bn_mp_reduce_2k.c Tue May 26 23:27:26 2020 +0800 +++ b/libtommath/bn_mp_reduce_2k.c Tue May 26 17:36:47 2020 +0200 @@ -1,48 +1,40 @@ #include "tommath_private.h" #ifdef BN_MP_REDUCE_2K_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 - */ +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ /* reduces a modulo n where n is of the form 2**p - d */ -int mp_reduce_2k(mp_int *a, const mp_int *n, mp_digit d) +mp_err mp_reduce_2k(mp_int *a, const mp_int *n, mp_digit d) { mp_int q; - int p, res; + mp_err err; + int p; - if ((res = mp_init(&q)) != MP_OKAY) { - return res; + if ((err = mp_init(&q)) != MP_OKAY) { + return err; } p = mp_count_bits(n); top: /* q = a/2**p, a = a mod 2**p */ - if ((res = mp_div_2d(a, p, &q, a)) != MP_OKAY) { + if ((err = mp_div_2d(a, p, &q, a)) != MP_OKAY) { goto LBL_ERR; } if (d != 1u) { /* q = q * d */ - if ((res = mp_mul_d(&q, d, &q)) != MP_OKAY) { + if ((err = mp_mul_d(&q, d, &q)) != MP_OKAY) { goto LBL_ERR; } } /* a = a + q */ - if ((res = s_mp_add(a, &q, a)) != MP_OKAY) { + if ((err = s_mp_add(a, &q, a)) != MP_OKAY) { goto LBL_ERR; } if (mp_cmp_mag(a, n) != MP_LT) { - if ((res = s_mp_sub(a, n, a)) != MP_OKAY) { + if ((err = s_mp_sub(a, n, a)) != MP_OKAY) { goto LBL_ERR; } goto top; @@ -50,11 +42,7 @@ LBL_ERR: mp_clear(&q); - return res; + return err; } #endif - -/* ref: HEAD -> master, tag: v1.1.0 */ -/* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ -/* commit time: 2019-01-28 20:32:32 +0100 */