mdw@git.distorted.org.uk Git - catacomb/blob - pub/ed25519-tvconv

   1 #! /usr/bin/perl
   2
   3 $mode = shift @ARGV;
   4
   5 if ($mode eq "k") { print "pubkey {\n"; }
   6 elsif ($mode eq "s") { print "sign {\n"; }
   7 elsif ($mode eq "v") { print "verify {\n"; }
   8
   9 while (<>) {
  10   s/^([^:]{64})([^:]{64}):\2:([^:]*):([^:]{128})\3:$/$1:$2:$3:$4/;
  11   my ($k, $K, $m, $s) = ($1, $2, $3, $4);
  12   $m = '""' unless length $m;
  13   if ($mode eq "k") { print "  $k\n    $K;\n"; }
  14   elsif ($mode eq "s") { print "  $k\n    $m\n    $s;\n"; }
  15   elsif ($mode eq "v") {
  16     print "  $K\n    $m\n    $s\n    0;\n";
  17     (my $Kneg = $K) =~ s/([0-9a-f]{2})$/ sprintf "%02x", hex($1) ^ 0x80 /e;
  18     print "  $Kneg\n    $m\n    $s\n    -1;\n";
  19     (my $Kzap = $K) =~ s/^([0-9a-f]{2})/ sprintf "%02x", hex($1) ^ 0xff /e;
  20     print "  $Kzap\n    $m\n    $s\n    -1;\n";
  21     (my $mzap = $m) =~ s/^([0-9a-f]{2})/ sprintf "%02x", hex($1) ^ 0xff /e;
  22     $mzap = "00" unless $m ne '""';
  23     print "  $K\n    $mzap\n    $s\n    -1;\n";
  24     (my $szap = $s) =~ s/^([0-9a-f]{2})/ sprintf "%02x", hex($1) ^ 0xff /e;
  25     print "  $K\n    $m\n    $szap\n    -1;\n";
  26   }
  27 }
  28
  29 print "}\n";