Mercurial > dropbear

annotate libtommath/bn_mp_sqr.c @ 1855:35d504d59c05

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Implement server-side support for sk-ecdsa U2F-backed keys (#142) * Implement server-side support for sk-ecdsa U2F-backed keys * Fix out-of-bounds read on normal ecdsa-sha2-[identifier] keys * Fix one more potential out-of-bounds read * Check if nistp256 curve is used in sk-ecdsa-sha2- key It's the only allowed curve per PROTOCOL.u2f specification * Implement server-side support for sk-ed25519 FIDO2-backed keys * Keys with type sk-* make no sense as host keys, so they should be disabled * fix typo * Make sk-ecdsa call buf_ecdsa_verify This reduces code duplication, the SK code just handles the different message format. * Reduce sk specific code The application id can be stored in signkey, then we don't need to call sk-specific functions from svr-authpubkey * Remove debugging output, which causes compilation errors with DEBUG_TRACE disabled * Proper cleanup of sk_app Co-authored-by: Matt Johnston <[email protected]>
author egor-duda <egor-duda@users.noreply.github.com>
date Sat, 22 Jan 2022 16:53:04 +0300
parents 1051e4eea25a
children
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1655
f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
diff changeset
1 #include "tommath_private.h"
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2 #ifdef BN_MP_SQR_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 /* computes b = a*a */
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7 mp_err mp_sqr(const mp_int *a, mp_int *b)
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8 {
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9 mp_err err;
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10 if (MP_HAS(S_MP_TOOM_SQR) && /* use Toom-Cook? */
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11 (a->used >= MP_TOOM_SQR_CUTOFF)) {
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12 err = s_mp_toom_sqr(a, b);
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13 } else if (MP_HAS(S_MP_KARATSUBA_SQR) && /* Karatsuba? */
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14 (a->used >= MP_KARATSUBA_SQR_CUTOFF)) {
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15 err = s_mp_karatsuba_sqr(a, b);
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16 } else if (MP_HAS(S_MP_SQR_FAST) && /* can we use the fast comba multiplier? */
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17 (((a->used * 2) + 1) < MP_WARRAY) &&
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18 (a->used < (MP_MAXFAST / 2))) {
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19 err = s_mp_sqr_fast(a, b);
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20 } else if (MP_HAS(S_MP_SQR)) {
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21 err = s_mp_sqr(a, b);
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22 } else {
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23 err = MP_VAL;
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24 }
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25 b->sign = MP_ZPOS;
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26 return err;
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27 }
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28 #endif