This represents my first effort with Perl/TK. The basic idea behind this was to create a GUI app that would quickly convert hex values to char and vice versa without having to rely on eyeing an ASCII table each time I want to perform a conversion. For example, this app will take the following HEX values
50 65 72 6C 20 4D 6F 6E 6B 73 21
and output...well, you'll just have to see. ;)
This application can also be used in some cases to create or convert Snort IDS bytecode, which could prove useful when working with signatures. 
#!c:/perl/bin/perl -w

use Tk;
use Tk::DialogBox;

use strict;
sub convert_hex;
sub convert_char;

my $main = new MainWindow(-title => 'Hex2Char - Char2Hex');

my (@splithex, @splitchar);
my ($val, $value);
my $leftframe = $main->Frame();
$leftframe->pack(-side => 'left'); 

my $rightframe = $main->Frame();
$rightframe->pack(-side => 'right');

$leftframe->Label(-text => "Hex")->pack();
my $hexval = $leftframe->Entry(-width => '30')->pack();

my $buttonleft = $leftframe->Button(-text => '>>', 
          -command => sub{convert_hex;})->pack();

$rightframe->Label(-text => "Char")->pack();
my $charval = $rightframe->Entry(-width => '30')->pack();; 

my $buttonright = $rightframe->Button(-text => '<<', 
          -command => sub{convert_char;})->pack();

my $exit = $main->Button(-text => 'Exit',
                        -command => sub{exit;}); 

$exit->pack(-side => 'bottom');

MainLoop;

sub convert_hex {
my @charconv = ();
my $hexvals = $hexval->get;
@splithex =  split(' ', $hexvals);
foreach $value (@splithex) {
$val = pack "H*", $value;
push @charconv, "$val";
}
my @switch = reverse @charconv;
$charval->delete(0, 'end');
map {$charval->insert(0,$_)} @switch;
}

sub convert_char {
my @hexconv = ();
my $charvals = $charval->get;
@splitchar =  split(//, $charvals);
foreach $value (@splitchar) {
$val = unpack "H*", $value;
push @hexconv, "$val ";
}
my @switch = reverse @hexconv;
$hexval->delete(0, 'end');
map {$hexval->insert(0,uc $_)} @switch;
}

[download]
As always, comments and suggestions for improvement welcome.

cheers, -semio

In reply to Perl/TK hex2char - char2hex convertor by semio

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