Mercurial > dropbear
view libtommath/bn_mp_addmod.c @ 382:0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 11 Jan 2007 02:41:05 +0000 |
parents | eed26cff980b |
children | 5ff8218bcee9 |
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#include <tommath.h> #ifdef BN_MP_ADDMOD_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_addmod (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_add (a, b, &t)) != MP_OKAY) { mp_clear (&t); return res; } res = mp_mod (&t, c, d); mp_clear (&t); return res; } #endif