Mercurial > dropbear

annotate libtommath/bn_mp_read_signed_bin.c @ 1665:7c17995bcdfb

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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>
date Wed, 18 Mar 2020 15:28:56 +0000
parents f52919ffd3b1
children
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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_READ_SIGNED_BIN_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * SPDX-License-Identifier: Unlicense
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13 */
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14
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15 /* read signed bin, big endian, first byte is 0==positive or 1==negative */
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16 int mp_read_signed_bin(mp_int *a, const unsigned char *b, int c)
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17 {
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18 int res;
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20 /* read magnitude */
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21 if ((res = mp_read_unsigned_bin(a, b + 1, c - 1)) != MP_OKAY) {
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22 return res;
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23 }
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25 /* first byte is 0 for positive, non-zero for negative */
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26 if (b[0] == (unsigned char)0) {
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27 a->sign = MP_ZPOS;
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28 } else {
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29 a->sign = MP_NEG;
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30 }
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32 return MP_OKAY;
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33 }
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34 #endif
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36 /* ref: HEAD -> master, tag: v1.1.0 */
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37 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
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38 /* commit time: 2019-01-28 20:32:32 +0100 */