Mercurial > dropbear

annotate libtommath/bn_mp_zero.c @ 409:0e69e948caba

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Add comments about requiring keysize <= 2*SHA1_HASH_SIZE
author Matt Johnston <matt@ucc.asn.au>
date Sun, 04 Feb 2007 10:31:48 +0000
parents eed26cff980b
children 5ff8218bcee9
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1 #include <tommath.h>
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2 #ifdef BN_MP_ZERO_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 * The library is free for all purposes without any express
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13 * guarantee it works.
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14 *
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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16 */
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17
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18 /* set to zero */
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19 void mp_zero (mp_int * a)
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20 {
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21 int n;
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22 mp_digit *tmp;
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23
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24 a->sign = MP_ZPOS;
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25 a->used = 0;
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26
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27 tmp = a->dp;
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28 for (n = 0; n < a->alloc; n++) {
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29 *tmp++ = 0;
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30 }
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31 }
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32 #endif