The Tor Browser: security/nss/lib/freebl/mpi/utils/exptmod.c@6474c204b198 (annotated)

security/nss/lib/freebl/mpi/utils/exptmod.c@6474c204b198 (annotated)

Wed, 31 Dec 2014 06:09:35 +0100

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

 /*
  *  exptmod.c
  *
  * Command line tool to perform modular exponentiation on arbitrary
  * precision integers.
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "mpi.h"
 int main(int argc, char *argv[])
 {
   mp_int  a, b, m;
   mp_err  res;
   char   *str;
   int     len, rval = 0;
   if(argc < 3) {
     fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]);
     return 1;
   }
   mp_init(&a); mp_init(&b); mp_init(&m);
   mp_read_radix(&a, argv[1], 10);
   mp_read_radix(&b, argv[2], 10);
   mp_read_radix(&m, argv[3], 10);
   if((res = mp_exptmod(&a, &b, &m, &a)) != MP_OKAY) {
     fprintf(stderr, "%s: error: %s\n", argv[0], mp_strerror(res));
     rval = 1;
   } else {
     len = mp_radix_size(&a, 10);
     str = calloc(len, sizeof(char));
     mp_toradix(&a, str, 10);
     printf("%s\n", str);
     free(str);
   }
   mp_clear(&a); mp_clear(&b); mp_clear(&m);
   return rval;
 }