security/nss/lib/freebl/mpi/tests/mptest-4a.c@b8a032363ba2 (annotated)
security/nss/lib/freebl/mpi/tests/mptest-4a.c
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* |
| michael@0 | 2 | * mptest4a - modular exponentiation speed test |
| michael@0 | 3 | * |
| michael@0 | 4 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include <stdio.h> |
| michael@0 | 9 | #include <stdlib.h> |
| michael@0 | 10 | #include <string.h> |
| michael@0 | 11 | #include <limits.h> |
| michael@0 | 12 | #include <time.h> |
| michael@0 | 13 | |
| michael@0 | 14 | #include <sys/time.h> |
| michael@0 | 15 | |
| michael@0 | 16 | #include "mpi.h" |
| michael@0 | 17 | #include "mpprime.h" |
| michael@0 | 18 | |
| michael@0 | 19 | typedef struct { |
| michael@0 | 20 | unsigned int sec; |
| michael@0 | 21 | unsigned int usec; |
| michael@0 | 22 | } instant_t; |
| michael@0 | 23 | |
| michael@0 | 24 | instant_t now(void) |
| michael@0 | 25 | { |
| michael@0 | 26 | struct timeval clk; |
| michael@0 | 27 | instant_t res; |
| michael@0 | 28 | |
| michael@0 | 29 | res.sec = res.usec = 0; |
| michael@0 | 30 | |
| michael@0 | 31 | if(gettimeofday(&clk, NULL) != 0) |
| michael@0 | 32 | return res; |
| michael@0 | 33 | |
| michael@0 | 34 | res.sec = clk.tv_sec; |
| michael@0 | 35 | res.usec = clk.tv_usec; |
| michael@0 | 36 | |
| michael@0 | 37 | return res; |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | extern mp_err s_mp_pad(); |
| michael@0 | 41 | |
| michael@0 | 42 | int main(int argc, char *argv[]) |
| michael@0 | 43 | { |
| michael@0 | 44 | int ix, num, prec = 8; |
| michael@0 | 45 | unsigned int d; |
| michael@0 | 46 | instant_t start, finish; |
| michael@0 | 47 | time_t seed; |
| michael@0 | 48 | mp_int a, m, c; |
| michael@0 | 49 | |
| michael@0 | 50 | seed = time(NULL); |
| michael@0 | 51 | |
| michael@0 | 52 | if(argc < 2) { |
| michael@0 | 53 | fprintf(stderr, "Usage: %s <num-tests> [<precision>]\n", argv[0]); |
| michael@0 | 54 | return 1; |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | if((num = atoi(argv[1])) < 0) |
| michael@0 | 58 | num = -num; |
| michael@0 | 59 | |
| michael@0 | 60 | if(!num) { |
| michael@0 | 61 | fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]); |
| michael@0 | 62 | return 1; |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | if(argc > 2) { |
| michael@0 | 66 | if((prec = atoi(argv[2])) <= 0) |
| michael@0 | 67 | prec = 8; |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | printf("Test 3a: Modular exponentiation timing test\n" |
| michael@0 | 71 | "Precision: %d digits (%d bits)\n" |
| michael@0 | 72 | "# of tests: %d\n\n", prec, prec * DIGIT_BIT, num); |
| michael@0 | 73 | |
| michael@0 | 74 | mp_init_size(&a, prec); |
| michael@0 | 75 | mp_init_size(&m, prec); |
| michael@0 | 76 | mp_init_size(&c, prec); |
| michael@0 | 77 | s_mp_pad(&a, prec); |
| michael@0 | 78 | s_mp_pad(&m, prec); |
| michael@0 | 79 | s_mp_pad(&c, prec); |
| michael@0 | 80 | |
| michael@0 | 81 | printf("Testing modular exponentiation ... \n"); |
| michael@0 | 82 | srand((unsigned int)seed); |
| michael@0 | 83 | |
| michael@0 | 84 | start = now(); |
| michael@0 | 85 | for(ix = 0; ix < num; ix++) { |
| michael@0 | 86 | mpp_random(&a); |
| michael@0 | 87 | mpp_random(&c); |
| michael@0 | 88 | mpp_random(&m); |
| michael@0 | 89 | mp_exptmod(&a, &c, &m, &c); |
| michael@0 | 90 | } |
| michael@0 | 91 | finish = now(); |
| michael@0 | 92 | |
| michael@0 | 93 | d = (finish.sec - start.sec) * 1000000; |
| michael@0 | 94 | d -= start.usec; d += finish.usec; |
| michael@0 | 95 | |
| michael@0 | 96 | printf("Total time elapsed: %u usec\n", d); |
| michael@0 | 97 | printf("Time per exponentiation: %u usec (%.3f sec)\n", |
| michael@0 | 98 | (d / num), (double)(d / num) / 1000000); |
| michael@0 | 99 | |
| michael@0 | 100 | mp_clear(&c); |
| michael@0 | 101 | mp_clear(&a); |
| michael@0 | 102 | mp_clear(&m); |
| michael@0 | 103 | |
| michael@0 | 104 | return 0; |
| michael@0 | 105 | } |
