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