#!/usr/bin/perl -w
#
# IMAP4 authenticator for Squid
# Copyright (C) 2008 Quixotech Systems, LLC <rob@quixotech.com>
#
# This program is based on the following program: 
# POP3 authenticator for Squid
# Copyright (C) 2006 Henrik Nordstrom <henrik@henriknordstrom.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
#
# Change log:
#   2008-02-11	Robert M. Kettles	Initial revision
#

use strict;
use vars
	qw/
		$server $imap
	/;

use Mail::IMAPClient;

$|=1;

if ( @ARGV != 1 ) {
    print STDERR "Usage: $0 IMAP4 server\n";
    exit 1
}

$server = shift @ARGV;

while(<ARGV>) {
    my ($username, $password) = split(/\s+/);
    $username =~ s/%([0-9a-f][0-9a-f])/pack("H2",$1)/gie;
    $password =~ s/%([0-9a-f][0-9a-f])/pack("H2",$1)/gie;

    $imap = Mail::IMAPClient->new(Server  => $server);
    if (!$imap) {
      print "ERR IMAP Server not responding for authentication.\n";
      next;
    } 
    
    $imap->connect( User    => $username, Password => $password, Authmechanism => "LOGIN");	
    if ( $imap->IsAuthenticated()) {
	print "OK User $username authenticated.\n";
	$imap->logout;
        undef $imap;
	next;
    } else {
	print "ERR Username or password incorrect.\n";
        undef $imap;
	next;
    }
}