The Tor Browser: security/nss/lib/freebl/mpi/tests/mptest-4a.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  *  mptest4a - modular exponentiation speed test

     3  *

     4  * This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 #include <stdio.h>

     9 #include <stdlib.h>

    10 #include <string.h>

    11 #include <limits.h>

    12 #include <time.h>

    14 #include <sys/time.h>

    16 #include "mpi.h"

    17 #include "mpprime.h"

    19 typedef struct {

    20   unsigned int  sec;

    21   unsigned int  usec;

    22 } instant_t;

    24 instant_t now(void)

    25 {

    26   struct timeval clk;

    27   instant_t      res;

    29   res.sec = res.usec = 0;

    31   if(gettimeofday(&clk, NULL) != 0)

    32     return res;

    34   res.sec = clk.tv_sec;

    35   res.usec = clk.tv_usec;

    37   return res;

    38 }

    40 extern mp_err s_mp_pad();

    42 int main(int argc, char *argv[])

    43 {

    44   int        ix, num, prec = 8;

    45   unsigned   int d;

    46   instant_t  start, finish;

    47   time_t     seed;

    48   mp_int     a, m, c;

    50   seed = time(NULL);

    52   if(argc < 2) {

    53     fprintf(stderr, "Usage: %s <num-tests> [<precision>]\n", argv[0]);

    54     return 1;

    55   }

    57   if((num = atoi(argv[1])) < 0)

    58     num = -num;

    60   if(!num) {

    61     fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]);

    62     return 1;

    63   }

    65   if(argc > 2) {

    66     if((prec = atoi(argv[2])) <= 0)

    67       prec = 8;

    68   }

    70   printf("Test 3a: Modular exponentiation timing test\n"

    71 	 "Precision:  %d digits (%d bits)\n"

    72 	 "# of tests: %d\n\n", prec, prec * DIGIT_BIT, num);

    74   mp_init_size(&a, prec);

    75   mp_init_size(&m, prec);

    76   mp_init_size(&c, prec);

    77   s_mp_pad(&a, prec);

    78   s_mp_pad(&m, prec);

    79   s_mp_pad(&c, prec);

    81   printf("Testing modular exponentiation ... \n");

    82   srand((unsigned int)seed);

    84   start = now();

    85   for(ix = 0; ix < num; ix++) {

    86     mpp_random(&a);

    87     mpp_random(&c);

    88     mpp_random(&m);

    89     mp_exptmod(&a, &c, &m, &c);

    90   }

    91   finish = now();

    93   d = (finish.sec - start.sec) * 1000000;

    94   d -= start.usec; d += finish.usec;

    96   printf("Total time elapsed:        %u usec\n", d);

    97   printf("Time per exponentiation:   %u usec (%.3f sec)\n",

    98 	 (d / num), (double)(d / num) / 1000000);

   100   mp_clear(&c);

   101   mp_clear(&a);

   102   mp_clear(&m);

   104   return 0;

   105 }

The Tor Browser / file revision