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comparison: security/nss/lib/freebl/mpi/utils/metime.c
security/nss/lib/freebl/mpi/utils/metime.c
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| -1:000000000000 | 0:4dc35319ec78 |
|---|---|
| 1 /* | |
| 2 * metime.c | |
| 3 * | |
| 4 * Modular exponentiation timing test | |
| 5 * | |
| 6 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 7 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 8 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 9 | |
| 10 #include <stdio.h> | |
| 11 #include <stdlib.h> | |
| 12 #include <string.h> | |
| 13 #include <limits.h> | |
| 14 #include <time.h> | |
| 15 | |
| 16 #include "mpi.h" | |
| 17 #include "mpprime.h" | |
| 18 | |
| 19 double clk_to_sec(clock_t start, clock_t stop); | |
| 20 | |
| 21 int main(int argc, char *argv[]) | |
| 22 { | |
| 23 int ix, num, prec = 8; | |
| 24 unsigned int seed; | |
| 25 clock_t start, stop; | |
| 26 double sec; | |
| 27 | |
| 28 mp_int a, m, c; | |
| 29 | |
| 30 if(getenv("SEED") != NULL) | |
| 31 seed = abs(atoi(getenv("SEED"))); | |
| 32 else | |
| 33 seed = (unsigned int)time(NULL); | |
| 34 | |
| 35 if(argc < 2) { | |
| 36 fprintf(stderr, "Usage: %s <num-tests> [<nbits>]\n", argv[0]); | |
| 37 return 1; | |
| 38 } | |
| 39 | |
| 40 if((num = atoi(argv[1])) < 0) | |
| 41 num = -num; | |
| 42 | |
| 43 if(!num) { | |
| 44 fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]); | |
| 45 return 1; | |
| 46 } | |
| 47 | |
| 48 if(argc > 2) { | |
| 49 if((prec = atoi(argv[2])) <= 0) | |
| 50 prec = 8; | |
| 51 else | |
| 52 prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT; | |
| 53 | |
| 54 } | |
| 55 | |
| 56 printf("Modular exponentiation timing test\n" | |
| 57 "Precision: %d digits (%d bits)\n" | |
| 58 "# of tests: %d\n\n", prec, prec * DIGIT_BIT, num); | |
| 59 | |
| 60 mp_init_size(&a, prec); | |
| 61 mp_init_size(&m, prec); | |
| 62 mp_init_size(&c, prec); | |
| 63 | |
| 64 srand(seed); | |
| 65 | |
| 66 start = clock(); | |
| 67 for(ix = 0; ix < num; ix++) { | |
| 68 | |
| 69 mpp_random_size(&a, prec); | |
| 70 mpp_random_size(&c, prec); | |
| 71 mpp_random_size(&m, prec); | |
| 72 /* set msb and lsb of m */ | |
| 73 DIGIT(&m,0) |= 1; | |
| 74 DIGIT(&m, USED(&m)-1) |= (mp_digit)1 << (DIGIT_BIT - 1); | |
| 75 if (mp_cmp(&a, &m) > 0) | |
| 76 mp_sub(&a, &m, &a); | |
| 77 | |
| 78 mp_exptmod(&a, &c, &m, &c); | |
| 79 } | |
| 80 stop = clock(); | |
| 81 | |
| 82 sec = clk_to_sec(start, stop); | |
| 83 | |
| 84 printf("Total: %.3f seconds\n", sec); | |
| 85 printf("Individual: %.3f seconds\n", sec / num); | |
| 86 | |
| 87 mp_clear(&c); | |
| 88 mp_clear(&a); | |
| 89 mp_clear(&m); | |
| 90 | |
| 91 return 0; | |
| 92 } | |
| 93 | |
| 94 double clk_to_sec(clock_t start, clock_t stop) | |
| 95 { | |
| 96 return (double)(stop - start) / CLOCKS_PER_SEC; | |
| 97 } | |
| 98 | |
| 99 /*------------------------------------------------------------------------*/ | |
| 100 /* HERE THERE BE DRAGONS */ |
