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137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/*
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* metime.c
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*
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* Modular exponentiation timing test
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*
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* $Id: metime.c,v 1.5 2004/04/27 23:04:37 gerv%gerv.net Exp $
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
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*
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* The Initial Developer of the Original Code is
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* Michael J. Fromberger.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Netscape Communications Corporation
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* $Id: metime.c,v 1.5 2004/04/27 23:04:37 gerv%gerv.net Exp $ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <time.h>
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#include "mpi.h"
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#include "mpprime.h"
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double clk_to_sec(clock_t start, clock_t stop);
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int main(int argc, char *argv[])
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{
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int ix, num, prec = 8;
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unsigned int seed;
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clock_t start, stop;
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double sec;
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mp_int a, m, c;
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if(getenv("SEED") != NULL)
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seed = abs(atoi(getenv("SEED")));
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else
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seed = (unsigned int)time(NULL);
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if(argc < 2) {
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fprintf(stderr, "Usage: %s <num-tests> [<nbits>]\n", argv[0]);
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return 1;
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}
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if((num = atoi(argv[1])) < 0)
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num = -num;
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if(!num) {
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fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]);
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return 1;
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}
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if(argc > 2) {
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if((prec = atoi(argv[2])) <= 0)
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prec = 8;
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else
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prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT;
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}
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printf("Modular exponentiation timing test\n"
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"Precision: %d digits (%d bits)\n"
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"# of tests: %d\n\n", prec, prec * DIGIT_BIT, num);
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mp_init_size(&a, prec);
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mp_init_size(&m, prec);
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mp_init_size(&c, prec);
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srand(seed);
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start = clock();
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for(ix = 0; ix < num; ix++) {
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mpp_random_size(&a, prec);
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mpp_random_size(&c, prec);
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mpp_random_size(&m, prec);
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/* set msb and lsb of m */
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DIGIT(&m,0) |= 1;
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DIGIT(&m, USED(&m)-1) |= (mp_digit)1 << (DIGIT_BIT - 1);
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if (mp_cmp(&a, &m) > 0)
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mp_sub(&a, &m, &a);
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mp_exptmod(&a, &c, &m, &c);
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}
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stop = clock();
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sec = clk_to_sec(start, stop);
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printf("Total: %.3f seconds\n", sec);
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printf("Individual: %.3f seconds\n", sec / num);
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mp_clear(&c);
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mp_clear(&a);
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mp_clear(&m);
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return 0;
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}
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double clk_to_sec(clock_t start, clock_t stop)
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{
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return (double)(stop - start) / CLOCKS_PER_SEC;
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}
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/*------------------------------------------------------------------------*/
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/* HERE THERE BE DRAGONS */
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