annotate libtommath/bn_mp_invmod.c @ 447:278805938dcf

Patch from Nicolai Ehemann to try binding before going to the background, so that if it exits early (because something's already listening etc) then it will return an exitcode of 1.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 19 Jul 2007 15:54:18 +0000
parents 5ff8218bcee9
children 60fc6476e044
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1 #include <tommath.h>
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2 #ifdef BN_MP_INVMOD_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 /* hac 14.61, pp608 */
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19 int mp_invmod (mp_int * a, mp_int * b, mp_int * c)
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20 {
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21 /* b cannot be negative */
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22 if (b->sign == MP_NEG || mp_iszero(b) == 1) {
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23 return MP_VAL;
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24 }
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26 #ifdef BN_FAST_MP_INVMOD_C
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27 /* if the modulus is odd we can use a faster routine instead */
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28 if (mp_isodd (b) == 1) {
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29 return fast_mp_invmod (a, b, c);
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30 }
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31 #endif
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33 #ifdef BN_MP_INVMOD_SLOW_C
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34 return mp_invmod_slow(a, b, c);
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35 #endif
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37 return MP_VAL;
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38 }
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39 #endif
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41 /* $Source: /cvs/libtom/libtommath/bn_mp_invmod.c,v $ */
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42 /* $Revision: 1.3 $ */
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43 /* $Date: 2006/03/31 14:18:44 $ */