Mercurial > dropbear
view libtommath/bn_mp_dr_is_modulus.c @ 1727:93dcc97c3f3f
fix trace messages (#105)
author | Ilya <instenet@gmail.com> |
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date | Tue, 23 Jun 2020 17:20:05 +0300 |
parents | 1051e4eea25a |
children |
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#include "tommath_private.h" #ifdef BN_MP_DR_IS_MODULUS_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* determines if a number is a valid DR modulus */ mp_bool mp_dr_is_modulus(const mp_int *a) { int ix; /* must be at least two digits */ if (a->used < 2) { return MP_NO; } /* must be of the form b**k - a [a <= b] so all * but the first digit must be equal to -1 (mod b). */ for (ix = 1; ix < a->used; ix++) { if (a->dp[ix] != MP_MASK) { return MP_NO; } } return MP_YES; } #endif