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mptest-4.c
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00001 /*
00002  * Simple test driver for MPI library
00003  *
00004  * Test 4: Modular arithmetic tests
00005  *
00006  * ***** BEGIN LICENSE BLOCK *****
00007  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00008  *
00009  * The contents of this file are subject to the Mozilla Public License Version
00010  * 1.1 (the "License"); you may not use this file except in compliance with
00011  * the License. You may obtain a copy of the License at
00012  * http://www.mozilla.org/MPL/
00013  *
00014  * Software distributed under the License is distributed on an "AS IS" basis,
00015  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00016  * for the specific language governing rights and limitations under the
00017  * License.
00018  *
00019  * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
00020  *
00021  * The Initial Developer of the Original Code is
00022  * Michael J. Fromberger.
00023  * Portions created by the Initial Developer are Copyright (C) 1998
00024  * the Initial Developer. All Rights Reserved.
00025  *
00026  * Contributor(s):
00027  *
00028  * Alternatively, the contents of this file may be used under the terms of
00029  * either the GNU General Public License Version 2 or later (the "GPL"), or
00030  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00031  * in which case the provisions of the GPL or the LGPL are applicable instead
00032  * of those above. If you wish to allow use of your version of this file only
00033  * under the terms of either the GPL or the LGPL, and not to allow others to
00034  * use your version of this file under the terms of the MPL, indicate your
00035  * decision by deleting the provisions above and replace them with the notice
00036  * and other provisions required by the GPL or the LGPL. If you do not delete
00037  * the provisions above, a recipient may use your version of this file under
00038  * the terms of any one of the MPL, the GPL or the LGPL.
00039  *
00040  * ***** END LICENSE BLOCK ***** */
00041 /* $Id: mptest-4.c,v 1.3 2004/04/27 23:04:37 gerv%gerv.net Exp $ */
00042 
00043 #include <stdio.h>
00044 #include <stdlib.h>
00045 #include <string.h>
00046 #include <ctype.h>
00047 #include <limits.h>
00048 
00049 #include "mpi.h"
00050 
00051 int main(int argc, char *argv[])
00052 {
00053   int      ix;
00054   mp_int   a, b, c, m;
00055   mp_digit r;
00056 
00057   if(argc < 4) {
00058     fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]);
00059     return 1;
00060   }
00061 
00062   printf("Test 4: Modular arithmetic\n\n");
00063 
00064   mp_init(&a);
00065   mp_init(&b);
00066   mp_init(&m);
00067 
00068   mp_read_radix(&a, argv[1], 10);
00069   mp_read_radix(&b, argv[2], 10);
00070   mp_read_radix(&m, argv[3], 10);
00071   printf("a = "); mp_print(&a, stdout); fputc('\n', stdout);
00072   printf("b = "); mp_print(&b, stdout); fputc('\n', stdout);
00073   printf("m = "); mp_print(&m, stdout); fputc('\n', stdout);
00074   
00075   mp_init(&c);
00076   printf("\nc = a (mod m)\n");
00077 
00078   mp_mod(&a, &m, &c);
00079   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00080 
00081   printf("\nc = b (mod m)\n");
00082 
00083   mp_mod(&b, &m, &c);
00084   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00085 
00086   printf("\nc = b (mod 1853)\n");
00087 
00088   mp_mod_d(&b, 1853, &r);
00089   printf("c = %04X\n", r);
00090 
00091   printf("\nc = (a + b) mod m\n");
00092 
00093   mp_addmod(&a, &b, &m, &c);
00094   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00095 
00096   printf("\nc = (a - b) mod m\n");
00097 
00098   mp_submod(&a, &b, &m, &c);
00099   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00100 
00101   printf("\nc = (a * b) mod m\n");
00102 
00103   mp_mulmod(&a, &b, &m, &c);
00104   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00105 
00106   printf("\nc = (a ** b) mod m\n");
00107 
00108   mp_exptmod(&a, &b, &m, &c);
00109   printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
00110 
00111   printf("\nIn-place modular squaring test:\n");
00112   for(ix = 0; ix < 5; ix++) {
00113     printf("a = (a * a) mod m   a = ");
00114     mp_sqrmod(&a, &m, &a);
00115     mp_print(&a, stdout);
00116     fputc('\n', stdout);
00117   }
00118   
00119 
00120   mp_clear(&c);
00121   mp_clear(&m);
00122   mp_clear(&b);
00123   mp_clear(&a);
00124 
00125   return 0;
00126 }