diff options
| author | Steffen Jaeckel <s_jaeckel@gmx.de> | 2019-09-16 15:50:38 +0200 |
|---|---|---|
| committer | Matt Johnston <matt@ucc.asn.au> | 2019-09-16 21:50:38 +0800 |
| commit | 615ed4e46a52b6bfe0bfc581b8c2fbcc6cc488d1 (patch) | |
| tree | 12b2ba29ae4c42fc65d64d43968c5d03ab3f4452 /libtommath/bn_mp_invmod.c | |
| parent | fa116e983b4931010e1082dd5c8bf38bbc77718c (diff) | |
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
Diffstat (limited to 'libtommath/bn_mp_invmod.c')
| -rw-r--r-- | libtommath/bn_mp_invmod.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/libtommath/bn_mp_invmod.c b/libtommath/bn_mp_invmod.c index 36011d0..d205418 100644 --- a/libtommath/bn_mp_invmod.c +++ b/libtommath/bn_mp_invmod.c @@ -1,4 +1,4 @@ -#include <tommath_private.h> +#include "tommath_private.h" #ifdef BN_MP_INVMOD_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -9,35 +9,32 @@ * 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, tstdenis82@gmail.com, http://libtom.org + * SPDX-License-Identifier: Unlicense */ /* hac 14.61, pp608 */ -int mp_invmod (mp_int * a, mp_int * b, mp_int * c) +int mp_invmod(const mp_int *a, const mp_int *b, mp_int *c) { - /* b cannot be negative */ - if ((b->sign == MP_NEG) || (mp_iszero(b) == MP_YES)) { - return MP_VAL; - } + /* b cannot be negative and has to be >1 */ + if ((b->sign == MP_NEG) || (mp_cmp_d(b, 1uL) != MP_GT)) { + return MP_VAL; + } #ifdef BN_FAST_MP_INVMOD_C - /* if the modulus is odd we can use a faster routine instead */ - if ((mp_isodd(b) == MP_YES) && (mp_cmp_d(b, 1) != MP_EQ)) { - return fast_mp_invmod (a, b, c); - } + /* if the modulus is odd we can use a faster routine instead */ + if ((mp_isodd(b) == MP_YES)) { + return fast_mp_invmod(a, b, c); + } #endif #ifdef BN_MP_INVMOD_SLOW_C - return mp_invmod_slow(a, b, c); + return mp_invmod_slow(a, b, c); #else - return MP_VAL; + return MP_VAL; #endif } #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 */ |