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#!/usr/bin/perl |
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# Copyright (c) 2006 Hans Klunder <hans.klunder@bigfoot.com>. All rights reserved. |
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# This program is free software; you can redistribute it and/or |
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# modify it under the same terms as Perl itself. |
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|
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|
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use strict; |
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use warnings; |
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|
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use IO::Select; |
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use IO::Socket; |
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use IO::Socket::SSL; |
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use warnings; |
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use Data::Dump qw/dump/; |
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use Convert::ASN1 qw(asn_read); |
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use Net::LDAP::ASN qw(LDAPRequest LDAPResponse); |
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our $VERSION = '0.2'; |
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use fields qw(socket target); |
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use YAML qw/LoadFile/; |
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|
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my $config = { |
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yaml_dir => './yaml/', |
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listen => 'localhost:1389', |
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upstream_ldap => 'ldap.ffzg.hr', |
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upstream_ssl => 1, |
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overlay_prefix => 'ffzg-', |
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log_file => 'log', |
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|
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}; |
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|
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my $log_fh; |
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|
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sub log { |
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open($log_fh, '>', $config->{log_file}) || die "can't open ", $config->{log_file},": $!"; |
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$log_fh->autoflush(1); |
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print $log_fh join("\n", @_),"\n"; |
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} |
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|
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BEGIN { |
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$SIG{'__WARN__'} = sub { warn @_; main::log(@_); } |
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} |
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|
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|
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if ( ! -d $config->{yaml_dir} ) { |
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warn "DISABLE ", $config->{yaml_dir}," data overlay"; |
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} |
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|
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warn "# config = ",dump( $config ); |
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|
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sub handle { |
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my $clientsocket=shift; |
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my $serversocket=shift; |
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|
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# read from client |
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asn_read($clientsocket, my $reqpdu); |
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log_request($reqpdu); |
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|
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return 1 unless $reqpdu; |
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|
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# send to server |
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print $serversocket $reqpdu or die "Could not send PDU to server\n "; |
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|
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# read from server |
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my $ready; |
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my $sel = IO::Select->new($serversocket); |
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for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) { |
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asn_read($serversocket, my $respdu) or return 1; |
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$respdu = log_response($respdu); |
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# and send the result to the client |
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print $clientsocket $respdu; |
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} |
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|
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return 0; |
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} |
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|
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|
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sub log_request { |
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my $pdu=shift; |
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|
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print '-' x 80,"\n"; |
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print "Request ASN 1:\n"; |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
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print "Request Perl:\n"; |
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my $request = $LDAPRequest->decode($pdu); |
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print dump($request); |
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} |
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|
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sub log_response { |
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my $pdu=shift; |
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|
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print '-' x 80,"\n"; |
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print "Response ASN 1:\n"; |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
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print "Response Perl:\n"; |
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my $response = $LDAPResponse->decode($pdu); |
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|
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if ( defined $response->{protocolOp}->{searchResEntry} ) { |
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my $uid = $response->{protocolOp}->{searchResEntry}->{objectName}; |
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warn "## SEARCH $uid"; |
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|
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my @attrs; |
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|
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map { |
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if ( $_->{type} eq 'hrEduPersonUniqueNumber' ) { |
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foreach my $val ( @{ $_->{vals} } ) { |
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next if $val !~ m{.+:.+}; |
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my ( $n, $v ) = split(/\s*:\s*/, $val ); |
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push @attrs, { type => $_->{type} . '_' . $n, vals => [ $v ] }; |
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} |
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} |
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} @{ $response->{protocolOp}->{searchResEntry}->{attributes} }; |
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|
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warn "# ++ attrs ",dump( @attrs ); |
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|
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push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs; |
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|
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my $path = $config->{yaml_dir} . "$uid.yaml"; |
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if ( -e $path ) { |
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my $data = LoadFile($path); |
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warn "# yaml = ",dump($data); |
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|
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foreach my $type ( keys %$data ) { |
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|
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my $vals = $data->{$type}; |
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|
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push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, { |
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type => $config->{overlay_prefix} . $type, |
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vals => ref($vals) eq 'ARRAY' ? $vals : [ $vals ], |
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}; |
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} |
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} |
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|
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$pdu = $LDAPResponse->encode($response); |
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} |
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|
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print dump($response); |
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|
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return $pdu; |
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} |
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|
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sub run_proxy { |
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my $listenersock = shift; |
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my $targetsock=shift; |
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|
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die "Could not create listener socket: $!\n" unless $listenersock; |
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die "Could not create connection to server: $!\n" unless $targetsock; |
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|
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my $sel = IO::Select->new($listenersock); |
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my %Handlers; |
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while (my @ready = $sel->can_read) { |
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foreach my $fh (@ready) { |
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if ($fh == $listenersock) { |
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# let's create a new socket |
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my $psock = $listenersock->accept; |
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$sel->add($psock); |
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} else { |
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my $result = handle($fh,$targetsock); |
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if ($result) { |
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# we have finished with the socket |
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$sel->remove($fh); |
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$fh->close; |
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delete $Handlers{*$fh}; |
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} |
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} |
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} |
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} |
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} |
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|
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|
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$ENV{LANG} = 'C'; # so we don't double-encode utf-8 if LANG is utf-8 |
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|
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my $listenersock = IO::Socket::INET->new( |
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Listen => 5, |
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Proto => 'tcp', |
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Reuse => 1, |
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LocalAddr => $config->{listen}, |
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); |
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|
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|
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my $targetsock = $config->{upstream_ssl} |
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? IO::Socket::INET->new( |
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Proto => 'tcp', |
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PeerAddr => $config->{upstream_ldap}, |
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PeerPort => 389, |
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) |
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: IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps') |
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; |
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|
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run_proxy($listenersock,$targetsock); |
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|
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1; |
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