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comparison: security/nss/lib/freebl/mpi/utils/exptmod.c
security/nss/lib/freebl/mpi/utils/exptmod.c
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| -1:000000000000 | 0:800a8819d2bd |
|---|---|
| 1 /* | |
| 2 * exptmod.c | |
| 3 * | |
| 4 * Command line tool to perform modular exponentiation on arbitrary | |
| 5 * precision integers. | |
| 6 * | |
| 7 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 8 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 9 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 10 | |
| 11 #include <stdio.h> | |
| 12 #include <stdlib.h> | |
| 13 #include <string.h> | |
| 14 | |
| 15 #include "mpi.h" | |
| 16 | |
| 17 int main(int argc, char *argv[]) | |
| 18 { | |
| 19 mp_int a, b, m; | |
| 20 mp_err res; | |
| 21 char *str; | |
| 22 int len, rval = 0; | |
| 23 | |
| 24 if(argc < 3) { | |
| 25 fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]); | |
| 26 return 1; | |
| 27 } | |
| 28 | |
| 29 mp_init(&a); mp_init(&b); mp_init(&m); | |
| 30 mp_read_radix(&a, argv[1], 10); | |
| 31 mp_read_radix(&b, argv[2], 10); | |
| 32 mp_read_radix(&m, argv[3], 10); | |
| 33 | |
| 34 if((res = mp_exptmod(&a, &b, &m, &a)) != MP_OKAY) { | |
| 35 fprintf(stderr, "%s: error: %s\n", argv[0], mp_strerror(res)); | |
| 36 rval = 1; | |
| 37 } else { | |
| 38 len = mp_radix_size(&a, 10); | |
| 39 str = calloc(len, sizeof(char)); | |
| 40 mp_toradix(&a, str, 10); | |
| 41 | |
| 42 printf("%s\n", str); | |
| 43 | |
| 44 free(str); | |
| 45 } | |
| 46 | |
| 47 mp_clear(&a); mp_clear(&b); mp_clear(&m); | |
| 48 | |
| 49 return rval; | |
| 50 } |
