| Description: |
This mimics the javascript virtual keyboards, which are commonly being used by online banks, to avoid keystroke loggers, when entering passwords. It's just the basic model. I still need to run tests on it to see if the letters and passwords can be kept more hidden. But if you ever wanted to play with something like this, but didn't want to go thru all the hassle of building the keyboard...... here is one for you. The big font I use, makes the script take significantly longer to start up, but is worth it for ease of letter reading. |
#!/usr/bin/perl
use warnings;
use strict;
use Tk;
# an 8 x 13 grid
my @keys = (
'~','`','!','@','#','$','%','^','&','*','(',')','_',
'1','2','3','4','5','6','7','8','9','0','-','+','=',
'Q','W','E','R','T','Y','U','I','O','P','{','}','"',
'q','w','e','r','t','y','u','i','o','p','[',']','\'',
'A','S','D','F','G','H','J','K','L',':','|','\\','/',
'a','s','d','f','g','h','j','k','l',';','<','>','?',
'Z','X','C','V','B','N','M','BackSpace','dummy','dummy','dummy','dummy
+','dummy',
'z','x','c','v','b','n','m','.','Clear','dummy','dummy','dummy','dummy
+');
#print "@keys\n";
my $mw=tkinit;
$mw->fontCreate('big',
-family=>'arial',
-weight=>'bold',
-size=>int(-18*18/14));
my $tframe = $mw->Frame()->pack(-expand=>1,-fill=>'both');
my $passwd = '';
my $label = $tframe->Label(-text => "Password: ",
-font => 'big',
)->pack(-side=>'left');
my $entry = $tframe->Entry(
-show => '*',
-textvariable => \$passwd,
-bg => 'black',
-fg => 'white',
-font => 'big',
)->pack(-side=>'left',-expand=>1,-fill=>'x', -padx=> 5);
my $submit = $tframe->Button(
-text=>'Submit',
-font => 'big',
-bg => 'yellow',
-activebackground => 'hotpink',
-command => \&submit,
)->pack(-side=>'right',-expand=>1,-fill=>'x', -padx=> 5);
for my $row (1..8){
my $frame = $mw->Frame()->pack(-expand=>1,-fill=>'both');
for my $col (1..13){
my $l = shift @keys;
if($l eq 'dummy'){next}else{
$frame->Button(-text=> $l,
-bg => 'beige',
-activebackground => 'lightyellow',
-font => 'big',
-command => [\&process_key, $l],
)->pack(-side=>'left',-anchor=>'w', -expand=>1,-fill=
+>'both');
}
}
}
MainLoop;
#####################
sub process_key{
my $key = shift;
print "$key\n";
if ($key eq 'Clear'){$passwd = '';}
elsif ($key eq 'BackSpace'){ chop $passwd;}
else{ $passwd .= $key;}
}
#####################
sub submit {
print $entry->get(),"\n";
$entry->delete(0,'end');
}
