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annotate libtommath/bn_mp_to_signed_bin.c @ 1667:986126448688

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Update remaining advise to edit options.h You should edit localoptions.h instead.
author Alexander Dahl <ada@thorsis.com>
date Tue, 10 Mar 2020 15:38:38 +0100
parents f52919ffd3b1
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_TO_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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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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12 * SPDX-License-Identifier: Unlicense
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13 */
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14
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15 /* store in signed [big endian] format */
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parents: 1470
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16 int mp_to_signed_bin(const mp_int *a, unsigned char *b)
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17 {
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18 int res;
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19
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20 if ((res = mp_to_unsigned_bin(a, b + 1)) != MP_OKAY) {
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parents: 1470
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21 return res;
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parents: 1470
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22 }
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parents: 1470
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23 b[0] = (a->sign == MP_ZPOS) ? (unsigned char)0 : (unsigned char)1;
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parents: 1470
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24 return MP_OKAY;
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25 }
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26 #endif
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27
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28 /* ref: HEAD -> master, tag: v1.1.0 */
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parents: 1470
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29 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
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parents: 1470
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30 /* commit time: 2019-01-28 20:32:32 +0100 */