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mptest-8.c
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00001 /*
00002  *  Simple test driver for MPI library
00003  *
00004  *  Test 8: Probabilistic primality tester
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-8.c,v 1.4.30.1 2006/03/16 16:37:34 rrelyea%redhat.com Exp $ */
00042 
00043 #include <stdio.h>
00044 #include <stdlib.h>
00045 #include <string.h>
00046 #include <ctype.h>
00047 #include <limits.h>
00048 #include <time.h>
00049 
00050 #define MP_IOFUNC 1
00051 #include "mpi.h"
00052 
00053 #include "mpprime.h"
00054 
00055 int main(int argc, char *argv[])
00056 {
00057   int       ix;
00058   mp_digit  num;
00059   mp_int    a;
00060 
00061   srand(time(NULL));
00062 
00063   if(argc < 2) {
00064     fprintf(stderr, "Usage: %s <a>\n", argv[0]);
00065     return 1;
00066   }
00067 
00068   printf("Test 8: Probabilistic primality testing\n\n");
00069 
00070   mp_init(&a);
00071 
00072   mp_read_radix(&a, argv[1], 10);
00073 
00074   printf("a = "); mp_print(&a, stdout); fputc('\n', stdout);
00075 
00076   printf("\nChecking for divisibility by small primes ... \n");
00077   num = 170;
00078   if(mpp_divis_primes(&a, &num) == MP_YES) {
00079     printf("it is not prime\n");
00080     goto CLEANUP;
00081   }
00082   printf("Passed that test (not divisible by any small primes).\n");
00083 
00084   for(ix = 0; ix < 10; ix++) {
00085     printf("\nPerforming Rabin-Miller test, iteration %d\n", ix + 1);
00086 
00087     if(mpp_pprime(&a, 5) == MP_NO) {
00088       printf("it is not prime\n");
00089       goto CLEANUP;
00090     }
00091   }
00092   printf("All tests passed; a is probably prime\n");
00093 
00094 CLEANUP:
00095   mp_clear(&a);
00096 
00097   return 0;
00098 }