Mercurial > dropbear
view libtommath/bn_mp_submod.c @ 338:1c7a072000e0
BUG: mp_div_2d returns status and it isn't checked.
FIX: Check and return status.
From Erik Hovland
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Fri, 07 Jul 2006 06:43:55 +0000 |
parents | eed26cff980b |
children | 5ff8218bcee9 |
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#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