Mercurial > dropbear
diff libtommath/bn_mp_expt_d_ex.c @ 1655:f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
* make key-generation compliant to FIPS 186.4
* fix includes in tommath_class.h
* update fuzzcorpus instead of error-out
* fixup fuzzing make-targets
* update Makefile.in
* apply necessary patches to ltm sources
* clean-up not required ltm files
* update to vanilla ltm 1.1.0
this already only contains the required files
* remove set/get double
author | Steffen Jaeckel <s_jaeckel@gmx.de> |
---|---|
date | Mon, 16 Sep 2019 15:50:38 +0200 |
parents | 8bba51a55704 |
children |
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--- a/libtommath/bn_mp_expt_d_ex.c Wed May 15 21:59:45 2019 +0800 +++ b/libtommath/bn_mp_expt_d_ex.c Mon Sep 16 15:50:38 2019 +0200 @@ -1,4 +1,4 @@ -#include <tommath_private.h> +#include "tommath_private.h" #ifdef BN_MP_EXPT_D_EX_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -9,75 +9,71 @@ * 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, [email protected], http://libtom.org + * SPDX-License-Identifier: Unlicense */ /* calculate c = a**b using a square-multiply algorithm */ -int mp_expt_d_ex (mp_int * a, mp_digit b, mp_int * c, int fast) +int mp_expt_d_ex(const mp_int *a, mp_digit b, mp_int *c, int fast) { - int res; - unsigned int x; + int res; + unsigned int x; - mp_int g; + mp_int g; - if ((res = mp_init_copy (&g, a)) != MP_OKAY) { - return res; - } + if ((res = mp_init_copy(&g, a)) != MP_OKAY) { + return res; + } - /* set initial result */ - mp_set (c, 1); + /* set initial result */ + mp_set(c, 1uL); - if (fast != 0) { - while (b > 0) { - /* if the bit is set multiply */ - if ((b & 1) != 0) { - if ((res = mp_mul (c, &g, c)) != MP_OKAY) { - mp_clear (&g); - return res; - } - } + if (fast != 0) { + while (b > 0u) { + /* if the bit is set multiply */ + if ((b & 1u) != 0u) { + if ((res = mp_mul(c, &g, c)) != MP_OKAY) { + mp_clear(&g); + return res; + } + } - /* square */ - if (b > 1) { - if ((res = mp_sqr (&g, &g)) != MP_OKAY) { - mp_clear (&g); - return res; - } - } + /* square */ + if (b > 1u) { + if ((res = mp_sqr(&g, &g)) != MP_OKAY) { + mp_clear(&g); + return res; + } + } - /* shift to next bit */ - b >>= 1; - } - } - else { - for (x = 0; x < DIGIT_BIT; x++) { - /* square */ - if ((res = mp_sqr (c, c)) != MP_OKAY) { - mp_clear (&g); - return res; + /* shift to next bit */ + b >>= 1; } + } else { + for (x = 0; x < (unsigned)DIGIT_BIT; x++) { + /* square */ + if ((res = mp_sqr(c, c)) != MP_OKAY) { + mp_clear(&g); + return res; + } - /* if the bit is set multiply */ - if ((b & (mp_digit) (((mp_digit)1) << (DIGIT_BIT - 1))) != 0) { - if ((res = mp_mul (c, &g, c)) != MP_OKAY) { - mp_clear (&g); - return res; - } - } + /* if the bit is set multiply */ + if ((b & ((mp_digit)1 << (DIGIT_BIT - 1))) != 0u) { + if ((res = mp_mul(c, &g, c)) != MP_OKAY) { + mp_clear(&g); + return res; + } + } - /* shift to next bit */ - b <<= 1; - } - } /* if ... else */ + /* shift to next bit */ + b <<= 1; + } + } /* if ... else */ - mp_clear (&g); - return MP_OKAY; + mp_clear(&g); + return MP_OKAY; } #endif -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */ +/* ref: HEAD -> master, tag: v1.1.0 */ +/* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ +/* commit time: 2019-01-28 20:32:32 +0100 */