security/nss/lib/freebl/mpi/utils/prng.c

   1 /*
   2  *  prng.c
   3  *
   4  *  Command-line pseudo-random number generator
   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: prng.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 <limits.h>
  46 #include <time.h>
  47
  48 #ifdef __OS2__
  49 #include <types.h>
  50 #include <process.h>
  51 #else
  52 #include <unistd.h>
  53 #endif
  54
  55 #include "bbs_rand.h"
  56
  57 int main(int argc, char *argv[])
  58 {
  59   unsigned char *seed;
  60   unsigned int   ix, num = 1;
  61   pid_t          pid;
  62
  63   if(argc > 1) {
  64     num = atoi(argv[1]);
  65     if(num <= 0)
  66       num = 1;
  67   }
  68
  69   pid = getpid();
  70   srand(time(NULL) * (unsigned int)pid);
  71
  72   /* Not a perfect seed, but not bad */
  73   seed = malloc(bbs_seed_size);
  74   for(ix = 0; ix < bbs_seed_size; ix++) {
  75     seed[ix] = rand() % UCHAR_MAX;
  76   }
  77
  78   bbs_srand(seed, bbs_seed_size);
  79   memset(seed, 0, bbs_seed_size);
  80   free(seed);
  81
  82   while(num-- > 0) {
  83     ix = bbs_rand();
  84
  85     printf("%u\n", ix);
  86   }
  87
  88   return 0;
  89
  90 }