Mercurial > dropbear

annotate libtommath/bn_mp_reduce_2k_setup_l.c @ 1928:333688ec53d0

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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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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_REDUCE_2K_SETUP_L_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */
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4 /* SPDX-License-Identifier: Unlicense */
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6 /* determines the setup value */
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7 mp_err mp_reduce_2k_setup_l(const mp_int *a, mp_int *d)
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8 {
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9 mp_err err;
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10 mp_int tmp;
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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
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parents: 1470
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11
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12 if ((err = mp_init(&tmp)) != MP_OKAY) {
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13 return err;
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14 }
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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15
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16 if ((err = mp_2expt(&tmp, mp_count_bits(a))) != MP_OKAY) {
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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
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parents: 1470
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17 goto LBL_ERR;
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18 }
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parents: 1470
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19
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20 if ((err = s_mp_sub(&tmp, a, d)) != MP_OKAY) {
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21 goto LBL_ERR;
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22 }
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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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23
f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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24 LBL_ERR:
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25 mp_clear(&tmp);
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26 return err;
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27 }
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28 #endif