crypto/bn/bn_prime.pl

   1 #!/usr/local/bin/perl
   2 # bn_prime.pl
   3
   4 $num=2048;
   5 $num=$ARGV[0] if ($#ARGV >= 0);
   6
   7 push(@primes,2);
   8 $p=1;
   9 loop: while ($#primes < $num-1)
  10         {
  11         $p+=2;
  12         $s=int(sqrt($p));
  13
  14         for ($i=0; $primes[$i]<=$s; $i++)
  15                 {
  16                 next loop if (($p%$primes[$i]) == 0);
  17                 }
  18         push(@primes,$p);
  19         }
  20
  21 print <<"EOF";
  22 /* Auto generated by bn_prime.pl */
  23 /* Copyright (C) 1995-1997 Eric Young (eay\@mincom.oz.au).
  24  * All rights reserved.
  25  * Copyright remains Eric Young's, and as such any Copyright notices in
  26  * the code are not to be removed.
  27  * See the COPYRIGHT file in the SSLeay distribution for more details.
  28  */
  29
  30 EOF
  31
  32 for ($i=0; $i <= $#primes; $i++)
  33         {
  34         if ($primes[$i] > 256)
  35                 {
  36                 $eight=$i;
  37                 last;
  38                 }
  39         }
  40
  41 printf "#ifndef EIGHT_BIT\n";
  42 printf "#define NUMPRIMES %d\n",$num;
  43 printf "#else\n";
  44 printf "#define NUMPRIMES %d\n",$eight;
  45 printf "#endif\n";
  46 print "static unsigned int primes[NUMPRIMES]=\n\t{\n\t";
  47 $init=0;
  48 for ($i=0; $i <= $#primes; $i++)
  49         {
  50         printf "\n#ifndef EIGHT_BIT\n\t" if ($primes[$i] > 256) && !($init++);
  51         printf("\n\t") if (($i%8) == 0) && ($i != 0);
  52         printf("%4d,",$primes[$i]);
  53         }
  54 print "\n#endif\n\t};\n";
  55
  56