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annotate libtommath/bn_mp_to_signed_bin.c @ 796:069b875031f5 ecc

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Fix ecdsa verification
author Matt Johnston <matt@ucc.asn.au>
date Thu, 09 May 2013 23:24:05 +0800
parents 5ff8218bcee9
children 60fc6476e044
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1 #include <tommath.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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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.com
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16 */
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18 /* store in signed [big endian] format */
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19 int mp_to_signed_bin (mp_int * a, unsigned char *b)
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20 {
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21 int res;
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23 if ((res = mp_to_unsigned_bin (a, b + 1)) != MP_OKAY) {
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24 return res;
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25 }
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26 b[0] = (unsigned char) ((a->sign == MP_ZPOS) ? 0 : 1);
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27 return MP_OKAY;
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28 }
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29 #endif
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31 /* $Source: /cvs/libtom/libtommath/bn_mp_to_signed_bin.c,v $ */
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32 /* $Revision: 1.3 $ */
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33 /* $Date: 2006/03/31 14:18:44 $ */