This works well on Linux, I don't know if Term::ReadKey works on Winblows.

#!/usr/bin/perl
use strict;
use Term::ReadKey;

my $pwd = mask_pwd();
print "\n$pwd\n";

sub mask_pwd{
  ReadMode(3);
  my $password = '';
  print "Enter Password\n";

while(1){
      my $ord = getord();
          if ($ord == 10){last}    # "Enter" 
          if ($ord == 127) { # ie "Backspace" 
                chop($password);
                print chr(8),' ',chr(8);
                next;        
      }   
     if($ord == 27){clearstream();$ord="\0"}
     if($ord != "\0"){
             $password .= chr($ord);
          print '*';      
     }
  }
ReadMode(0);
return $password;
}

sub getord{
   my $char;    
   if (defined ($char = ReadKey(0))){} 
return ord($char); 
}

sub clearstream{
  while(1){
     my $char;
     if (defined ($char = ReadKey(-1)) ){}else{return}
    }
return ; 
}
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