RetroZilla/security/nss/lib/freebl/mpi/tests/mptest-4a.c

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/*
* mptest4a - modular exponentiation speed test
*
* ***** 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) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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: mptest-4a.c,v 1.3 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 <sys/time.h>
#include "mpi.h"
#include "mpprime.h"
typedef struct {
unsigned int sec;
unsigned int usec;
} instant_t;
instant_t now(void)
{
struct timeval clk;
instant_t res;
res.sec = res.usec = 0;
if(gettimeofday(&clk, NULL) != 0)
return res;
res.sec = clk.tv_sec;
res.usec = clk.tv_usec;
return res;
}
extern mp_err s_mp_pad();
int main(int argc, char *argv[])
{
int ix, num, prec = 8;
unsigned int d;
instant_t start, finish;
time_t seed;
mp_int a, m, c;
seed = time(NULL);
if(argc < 2) {
fprintf(stderr, "Usage: %s <num-tests> [<precision>]\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;
}
printf("Test 3a: 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);
s_mp_pad(&a, prec);
s_mp_pad(&m, prec);
s_mp_pad(&c, prec);
printf("Testing modular exponentiation ... \n");
srand((unsigned int)seed);
start = now();
for(ix = 0; ix < num; ix++) {
mpp_random(&a);
mpp_random(&c);
mpp_random(&m);
mp_exptmod(&a, &c, &m, &c);
}
finish = now();
d = (finish.sec - start.sec) * 1000000;
d -= start.usec; d += finish.usec;
printf("Total time elapsed: %u usec\n", d);
printf("Time per exponentiation: %u usec (%.3f sec)\n",
(d / num), (double)(d / num) / 1000000);
mp_clear(&c);
mp_clear(&a);
mp_clear(&m);
return 0;
}