Mercurial > dropbear
view libtommath/bn_mp_submod.c @ 360:09cb54106e89 insecure-nocrypto
explicit merge of '0501e6f661b5415eb76f3b312d183c3adfbfb712'
and '2b954d406290e6a2be8eb4a262d3675ac95ac544'
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 02 Oct 2006 06:39:32 +0000 |
parents | eed26cff980b |
children | 5ff8218bcee9 |
line wrap: on
line source
#include <tommath.h> #ifdef BN_MP_SUBMOD_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, [email protected], http://math.libtomcrypt.org */ /* d = a - b (mod c) */ int mp_submod (mp_int * a, mp_int * b, mp_int * c, mp_int * d) { int res; mp_int t; if ((res = mp_init (&t)) != MP_OKAY) { return res; } if ((res = mp_sub (a, b, &t)) != MP_OKAY) { mp_clear (&t); return res; } res = mp_mod (&t, c, d); mp_clear (&t); return res; } #endif