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rsa-pkcs1-sign-tr.c

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  • Forked from Nettle / nettle
    Source project has a limited visibility.
    random-prime.c 3.00 KiB
    /* random-prime.c
     *
     * Command line tool for prime generation.
     *
     */
     
    /* nettle, low-level cryptographics library
     *
     * Copyright (C) 2010 Niels Mller
     *  
     * The nettle library is free software; you can redistribute it and/or modify
     * it under the terms of the GNU Lesser General Public License as published by
     * the Free Software Foundation; either version 2.1 of the License, or (at your
     * option) any later version.
     * 
     * The nettle library is distributed in the hope that it will be useful, but
     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     * License for more details.
     * 
     * You should have received a copy of the GNU Lesser General Public License
     * along with the nettle library; see the file COPYING.LIB.  If not, write to
     * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
     * MA 02111-1307, USA.
     */
    
    #if HAVE_CONFIG_H
    # include "config.h"
    #endif
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    
    #include "bignum.h"
    #include "yarrow.h"
    
    #include "io.h"
    
    #include "getopt.h"
    
    static void
    usage(void)
    {
      fprintf(stderr, "Usage: random-prime [OPTIONS] bits\n\n"
    	  "Options:\n"
    	  "      --help         Display this message.\n"
    	  "  -v, --verbose      Display timing information.\n"
    	  "  -r, --random FILE  Random data to use for seeding.\n");
    }
    
    int
    main(int argc, char **argv)
    {
      long bits;
      mpz_t p;
      struct yarrow256_ctx yarrow;
    
      int verbose = 0;  
      const char *random_file = NULL;
    
      int c;
      char *arg_end;
    
      clock_t start;
      clock_t end;
      
      static const struct option options[] =
        {
          /* Name, args, flag, val */
          { "help", no_argument, NULL, '?' },
          { "verbose", no_argument, NULL, 'v' },
          { "random", required_argument, NULL, 'r' },
          { NULL, 0, NULL, 0}
        };
    
      while ( (c = getopt_long(argc, argv, "v?r:", options, NULL)) != -1)
        switch (c)
          {
          case 'v':
    	verbose = 1;
    	break;
          case 'r':
    	random_file = optarg;
    	break;
          case '?':
    	usage();
    	return EXIT_FAILURE;
          default:
    	abort();
          }
    
      argc -= optind;
      argv += optind;
    
      if (argc != 1)
        {
          usage();
          return EXIT_FAILURE;
        }
    
      bits = strtol(argv[0], &arg_end, 0);
      if (*arg_end || bits < 0)
        {
          fprintf(stderr, "Invalid number.\n");
          return EXIT_FAILURE;
        }
    
      if (bits < 3)
        {
          fprintf(stderr, "Bitsize must be at least 3.\n");
          return EXIT_FAILURE;
        }
    
      /* NOTE: No sources */
      yarrow256_init(&yarrow, 0, NULL);
    
      /* Read some data to seed the generator */
      if (!simple_random(&yarrow, random_file))
        {
          werror("Initialization of randomness generator failed.\n");
          return EXIT_FAILURE;
        }
      
      mpz_init(p);
    
      start = clock();
    
      nettle_random_prime(p, bits,
    		      &yarrow, (nettle_random_func *) yarrow256_random);
    
      end = clock();
    
      mpz_out_str(stdout, 10, p);
      printf("\n");
    
      if (verbose)
        fprintf(stderr, "time: %.3g s\n",
    	    (double)(end - start) / CLOCKS_PER_SEC);
    
      return EXIT_SUCCESS;
    }