security/nss/lib/freebl/mpi/utils/identest.c@6474c204b198 (annotated)
security/nss/lib/freebl/mpi/utils/identest.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #include <stdio.h> |
| michael@0 | 6 | #include <stdlib.h> |
| michael@0 | 7 | #include "mpi.h" |
| michael@0 | 8 | #include "mpprime.h" |
| michael@0 | 9 | #include <sys/types.h> |
| michael@0 | 10 | #include <time.h> |
| michael@0 | 11 | |
| michael@0 | 12 | #define MAX_PREC (4096 / MP_DIGIT_BIT) |
| michael@0 | 13 | |
| michael@0 | 14 | mp_err identity_test(void) |
| michael@0 | 15 | { |
| michael@0 | 16 | mp_size preca, precb; |
| michael@0 | 17 | mp_err res; |
| michael@0 | 18 | mp_int a, b; |
| michael@0 | 19 | mp_int t1, t2, t3, t4, t5; |
| michael@0 | 20 | |
| michael@0 | 21 | preca = (rand() % MAX_PREC) + 1; |
| michael@0 | 22 | precb = (rand() % MAX_PREC) + 1; |
| michael@0 | 23 | |
| michael@0 | 24 | MP_DIGITS(&a) = 0; |
| michael@0 | 25 | MP_DIGITS(&b) = 0; |
| michael@0 | 26 | MP_DIGITS(&t1) = 0; |
| michael@0 | 27 | MP_DIGITS(&t2) = 0; |
| michael@0 | 28 | MP_DIGITS(&t3) = 0; |
| michael@0 | 29 | MP_DIGITS(&t4) = 0; |
| michael@0 | 30 | MP_DIGITS(&t5) = 0; |
| michael@0 | 31 | |
| michael@0 | 32 | MP_CHECKOK( mp_init(&a) ); |
| michael@0 | 33 | MP_CHECKOK( mp_init(&b) ); |
| michael@0 | 34 | MP_CHECKOK( mp_init(&t1) ); |
| michael@0 | 35 | MP_CHECKOK( mp_init(&t2) ); |
| michael@0 | 36 | MP_CHECKOK( mp_init(&t3) ); |
| michael@0 | 37 | MP_CHECKOK( mp_init(&t4) ); |
| michael@0 | 38 | MP_CHECKOK( mp_init(&t5) ); |
| michael@0 | 39 | |
| michael@0 | 40 | MP_CHECKOK( mpp_random_size(&a, preca) ); |
| michael@0 | 41 | MP_CHECKOK( mpp_random_size(&b, precb) ); |
| michael@0 | 42 | |
| michael@0 | 43 | if (mp_cmp(&a, &b) < 0) |
| michael@0 | 44 | mp_exch(&a, &b); |
| michael@0 | 45 | |
| michael@0 | 46 | MP_CHECKOK( mp_mod(&a, &b, &t1) ); /* t1 = a%b */ |
| michael@0 | 47 | MP_CHECKOK( mp_div(&a, &b, &t2, NULL) ); /* t2 = a/b */ |
| michael@0 | 48 | MP_CHECKOK( mp_mul(&b, &t2, &t3) ); /* t3 = (a/b)*b */ |
| michael@0 | 49 | MP_CHECKOK( mp_add(&t1, &t3, &t4) ); /* t4 = a%b + (a/b)*b */ |
| michael@0 | 50 | MP_CHECKOK( mp_sub(&t4, &a, &t5) ); /* t5 = a%b + (a/b)*b - a */ |
| michael@0 | 51 | if (mp_cmp_z(&t5) != 0) { |
| michael@0 | 52 | res = MP_UNDEF; |
| michael@0 | 53 | goto CLEANUP; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | CLEANUP: |
| michael@0 | 57 | mp_clear(&t5); |
| michael@0 | 58 | mp_clear(&t4); |
| michael@0 | 59 | mp_clear(&t3); |
| michael@0 | 60 | mp_clear(&t2); |
| michael@0 | 61 | mp_clear(&t1); |
| michael@0 | 62 | mp_clear(&b); |
| michael@0 | 63 | mp_clear(&a); |
| michael@0 | 64 | return res; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | int |
| michael@0 | 68 | main(void) |
| michael@0 | 69 | { |
| michael@0 | 70 | unsigned int seed = (unsigned int)time(NULL); |
| michael@0 | 71 | unsigned long count = 0; |
| michael@0 | 72 | mp_err res; |
| michael@0 | 73 | |
| michael@0 | 74 | srand(seed); |
| michael@0 | 75 | |
| michael@0 | 76 | while (MP_OKAY == (res = identity_test())) { |
| michael@0 | 77 | if ((++count % 100) == 0) |
| michael@0 | 78 | fputc('.', stderr); |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | fprintf(stderr, "\ntest failed, err %d\n", res); |
| michael@0 | 82 | return res; |
| michael@0 | 83 | } |
