Mercurial > dropbear

annotate libtommath/bn_mp_shrink.c @ 1909:43ebe0028187

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Add tests for dropbearconvert
author Matt Johnston <matt@ucc.asn.au>
date Tue, 29 Mar 2022 22:29:17 +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
diff changeset
1 #include "tommath_private.h"
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2 #ifdef BN_MP_SHRINK_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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parents:
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6 /* shrink a bignum */
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parents: 1655
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7 mp_err mp_shrink(mp_int *a)
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8 {
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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9 mp_digit *tmp;
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parents: 1655
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10 int alloc = MP_MAX(MP_MIN_PREC, a->used);
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11 if (a->alloc != alloc) {
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12 if ((tmp = (mp_digit *) MP_REALLOC(a->dp,
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parents: 1655
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13 (size_t)a->alloc * sizeof(mp_digit),
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parents: 1655
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14 (size_t)alloc * sizeof(mp_digit))) == NULL) {
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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15 return MP_MEM;
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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16 }
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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17 a->dp = tmp;
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parents: 1655
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18 a->alloc = alloc;
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parents: 1470
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19 }
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parents: 1470
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20 return MP_OKAY;
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21 }
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22 #endif