/security/nss/lib/freebl/mpi/tests/mptest-5.c

  1/*
  2 * Simple test driver for MPI library
  3 *
  4 * Test 5: Other number theoretic functions
  5 *
  6 * ***** BEGIN LICENSE BLOCK *****
  7 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  8 *
  9 * The contents of this file are subject to the Mozilla Public License Version
 10 * 1.1 (the "License"); you may not use this file except in compliance with
 11 * the License. You may obtain a copy of the License at
 12 * http://www.mozilla.org/MPL/
 13 *
 14 * Software distributed under the License is distributed on an "AS IS" basis,
 15 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 16 * for the specific language governing rights and limitations under the
 17 * License.
 18 *
 19 * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
 20 *
 21 * The Initial Developer of the Original Code is
 22 * Michael J. Fromberger.
 23 * Portions created by the Initial Developer are Copyright (C) 1998
 24 * the Initial Developer. All Rights Reserved.
 25 *
 26 * Contributor(s):
 27 *
 28 * Alternatively, the contents of this file may be used under the terms of
 29 * either the GNU General Public License Version 2 or later (the "GPL"), or
 30 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 31 * in which case the provisions of the GPL or the LGPL are applicable instead
 32 * of those above. If you wish to allow use of your version of this file only
 33 * under the terms of either the GPL or the LGPL, and not to allow others to
 34 * use your version of this file under the terms of the MPL, indicate your
 35 * decision by deleting the provisions above and replace them with the notice
 36 * and other provisions required by the GPL or the LGPL. If you do not delete
 37 * the provisions above, a recipient may use your version of this file under
 38 * the terms of any one of the MPL, the GPL or the LGPL.
 39 *
 40 * ***** END LICENSE BLOCK ***** */
 41/* $Id: mptest-5.c,v 1.4 2004/04/27 23:04:37 gerv%gerv.net Exp $ */
 42
 43#include <stdio.h>
 44#include <stdlib.h>
 45#include <string.h>
 46#include <ctype.h>
 47#include <limits.h>
 48
 49#include "mpi.h"
 50
 51int main(int argc, char *argv[])
 52{
 53  mp_int   a, b, c, x, y;
 54
 55  if(argc < 3) {
 56    fprintf(stderr, "Usage: %s <a> <b>\n", argv[0]);
 57    return 1;
 58  }
 59
 60  printf("Test 5: Number theoretic functions\n\n");
 61
 62  mp_init(&a);
 63  mp_init(&b);
 64
 65  mp_read_radix(&a, argv[1], 10);
 66  mp_read_radix(&b, argv[2], 10);
 67
 68  printf("a = "); mp_print(&a, stdout); fputc('\n', stdout);
 69  printf("b = "); mp_print(&b, stdout); fputc('\n', stdout);
 70  
 71  mp_init(&c);
 72  printf("\nc = (a, b)\n");
 73
 74  mp_gcd(&a, &b, &c);
 75  printf("Euclid: c = "); mp_print(&c, stdout); fputc('\n', stdout);
 76/*
 77  mp_bgcd(&a, &b, &c);
 78  printf("Binary: c = "); mp_print(&c, stdout); fputc('\n', stdout);
 79*/
 80  mp_init(&x);
 81  mp_init(&y);
 82  printf("\nc = (a, b) = ax + by\n");
 83
 84  mp_xgcd(&a, &b, &c, &x, &y);
 85  printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
 86  printf("x = "); mp_print(&x, stdout); fputc('\n', stdout);
 87  printf("y = "); mp_print(&y, stdout); fputc('\n', stdout);
 88
 89  printf("\nc = a^-1 (mod b)\n");
 90  if(mp_invmod(&a, &b, &c) == MP_UNDEF) {
 91    printf("a has no inverse mod b\n");
 92  } else {
 93    printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
 94  }
 95
 96  mp_clear(&y);
 97  mp_clear(&x);
 98  mp_clear(&c);
 99  mp_clear(&b);
100  mp_clear(&a);
101
102  return 0;
103}