diff options
Diffstat (limited to 'libtommath/bn_mp_invmod.c')
| -rw-r--r-- | libtommath/bn_mp_invmod.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/libtommath/bn_mp_invmod.c b/libtommath/bn_mp_invmod.c index fdb6c88..525493a 100644 --- a/libtommath/bn_mp_invmod.c +++ b/libtommath/bn_mp_invmod.c @@ -1,4 +1,4 @@ -#include <tommath.h> +#include <tommath_private.h> #ifdef BN_MP_INVMOD_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -12,28 +12,32 @@ * The library is free for all purposes without any express * guarantee it works. * - * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com + * Tom St Denis, tstdenis82@gmail.com, http://libtom.org */ /* 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) == 1) { - return MP_VAL; - } + /* b cannot be negative */ + if ((b->sign == MP_NEG) || (mp_iszero(b) == MP_YES)) { + 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) == 1) { - 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) && (mp_cmp_d(b, 1) != MP_EQ)) { + 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; #endif - - return MP_VAL; } #endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |