#!/usr/bin/perl -w

use strict;
use Digest::MD5;


my %local;
my $file = shift || "/etc/passwd";

open(FILE, $file) or die "Can't open '$file': $!";
binmode(FILE);

my  $md5 = Digest::MD5->new;
while (<FILE>) 
{
  $md5->add($_);
}
close FILE;

$local{$file} = $md5->b64digest;

foreach my $k(keys %local) 
  {
    print "Key = $k\nValue = $local{$k}\n\n";
  }

print $md5->b64digest,  " $file\n";

##</code><code>##

Key = /etc/passwd
Value = Z+9+EFlyq2r1T90U9TiCiA
 
1B2M2Y8AsgTpgAmY7PhCfg /etc/passwd