Mercurial > dropbear
view libtommath/bn_mp_prime_is_divisible.c @ 1665:7c17995bcdfb
Improve address logging on early exit messages (#83)
Change 'Early exit' and 'Exit before auth' messages to include the IP
address & port as part of the message.
This allows log scanning utilities such as 'fail2ban' to obtain the
offending IP address as part of the failure event instead of extracting
the PID from the message and then scanning the log again for match
'child connection from' messages
Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author | Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com> |
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date | Wed, 18 Mar 2020 15:28:56 +0000 |
parents | f52919ffd3b1 |
children |
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#include "tommath_private.h" #ifdef BN_MP_PRIME_IS_DIVISIBLE_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. * * SPDX-License-Identifier: Unlicense */ /* determines if an integers is divisible by one * of the first PRIME_SIZE primes or not * * sets result to 0 if not, 1 if yes */ int mp_prime_is_divisible(const mp_int *a, int *result) { int err, ix; mp_digit res; /* default to not */ *result = MP_NO; for (ix = 0; ix < PRIME_SIZE; ix++) { /* what is a mod LBL_prime_tab[ix] */ if ((err = mp_mod_d(a, ltm_prime_tab[ix], &res)) != MP_OKAY) { return err; } /* is the residue zero? */ if (res == 0u) { *result = MP_YES; return MP_OKAY; } } return MP_OKAY; } #endif /* ref: HEAD -> master, tag: v1.1.0 */ /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ /* commit time: 2019-01-28 20:32:32 +0100 */