Mercurial > dropbear

annotate libtommath/bn_mp_abs.c @ 1757:517fb7b62438

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Add some more variation to fuzzer random number generation
author Matt Johnston <matt@ucc.asn.au>
date Fri, 23 Oct 2020 23:32:44 +0800
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
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_ABS_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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5
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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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6 /* b = |a|
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7 *
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8 * Simple function copies the input and fixes the sign to positive
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9 */
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parents: 1655
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10 mp_err mp_abs(const mp_int *a, mp_int *b)
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11 {
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12 mp_err err;
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13
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
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14 /* copy a to b */
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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15 if (a != b) {
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16 if ((err = mp_copy(a, b)) != MP_OKAY) {
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17 return err;
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parents: 1470
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18 }
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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19 }
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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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21 /* force the sign of b to positive */
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parents: 1470
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22 b->sign = MP_ZPOS;
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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
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24 return MP_OKAY;
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25 }
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26 #endif