crypto/des/doPC2

   1 #!/usr/local/bin/perl
   2
   3 @PC2_C=(14,17,11,24, 1, 5,
   4          3,28,15, 6,21,10,
   5         23,19,12, 4,26, 8,
   6         16, 7,27,20,13, 2,
   7         );
   8
   9 @PC2_D=(41,52,31,37,47,55,
  10         30,40,51,45,33,48,
  11         44,49,39,56,34,53,
  12         46,42,50,36,29,32,
  13         );
  14
  15 $i=0;
  16 foreach (@PC2_C) {
  17         $_--;
  18 #       printf "%2d,",$_;
  19         $C{$_}=$i;
  20         ++$i;
  21 #       print "\n" if ((($i) % 8) == 0);
  22         }
  23 $i=0;
  24 #print "\n";
  25 foreach (@PC2_D) {
  26         $_-=28;
  27         $_--;
  28 #       printf "%2d,",$_;
  29         $D{$_}=$i;
  30         $i++;
  31 #       print "\n" if ((($i) % 8) == 0);
  32         }
  33
  34 #print "\n";
  35 foreach $i (0 .. 27)
  36         {
  37         $_=$C{$i};
  38 #       printf "%2d,",$_;
  39         $i++;
  40 #       print "\n" if ((($i) % 8) == 0);
  41         }
  42 #print "\n";
  43
  44 #print "\n";
  45 foreach $i (0 .. 27)
  46         {
  47         $_=$D{$i};
  48 #       printf "%2d,",$_;
  49         $i++;
  50 #       print "\n" if ((($i) % 8) == 0);
  51         }
  52 #print "\n";
  53
  54 print "static ulong skb[8][64]={\n";
  55 &doit("C",*C, 0, 1, 2, 3, 4, 5);
  56 &doit("C",*C, 6, 7, 9,10,11,12);
  57 &doit("C",*C,13,14,15,16,18,19);
  58 &doit("C",*C,20,22,23,25,26,27);
  59
  60 &doit("D",*D, 0, 1, 2, 3, 4, 5);
  61 &doit("D",*D, 7, 8,10,11,12,13);
  62 &doit("D",*D,15,16,17,18,19,20);
  63 &doit("D",*D,21,22,23,24,26,27);
  64 print "};\n";
  65
  66 sub doit
  67         {
  68         local($l,*A,@b)=@_;
  69         local(@out);
  70
  71         printf("/* for $l bits (numbered as per FIPS 46) %d %d %d %d %d %d */\n",
  72                 $b[0]+1, $b[1]+1, $b[2]+1, $b[3]+1, $b[4]+1, $b[5]+1);
  73         for ($i=0; $i<64; $i++)
  74                 {
  75                 $out[$i]=0;
  76                 $j=1;
  77 #print "\n";
  78                 for ($k=0; $k<6; $k++)
  79                         {
  80                         $l=$A{$b[$k]};
  81 #print"$l - ";
  82                         if ((1<<$k) & $i)
  83                                 {
  84                                 $ll=int($l/6)*8+($l%6);
  85                                 $out[$i]|=1<<($ll);
  86                                 }
  87                         }
  88                 $pp=$out[$i];
  89                 $pp=($pp&0xff0000ff)|   (($pp&0x00ff0000)>>8)|
  90                                         (($pp&0x0000ff00)<<8);
  91                 printf("0x%08X,",$pp);
  92                 print "\n" if (($i+1) % 4 == 0);
  93                 }
  94         }