Mercurial > dropbear
view libtommath/bn_mp_reduce_setup.c @ 1928:333688ec53d0
Handle ecdsa-sk flags, reject no-touch
For the time being Dropbear will only allow SK auth with default
parameters, user-presence needs to be set.
In future handling of authorized_keys option "no-touch-required" can be
added.
This code would also be refactored to share between ecdsa and ed25519
once I get hardware/emulation to test ed25519.
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Wed, 30 Mar 2022 21:06:15 +0800 |
parents | 1051e4eea25a |
children |
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#include "tommath_private.h" #ifdef BN_MP_REDUCE_SETUP_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* pre-calculate the value required for Barrett reduction * For a given modulus "b" it calulates the value required in "a" */ mp_err mp_reduce_setup(mp_int *a, const mp_int *b) { mp_err err; if ((err = mp_2expt(a, b->used * 2 * MP_DIGIT_BIT)) != MP_OKAY) { return err; } return mp_div(a, b, a, NULL); } #endif