virtual-ldap/bin/ldap-rewrite.pl

#!/usr/bin/perl
# Copyright (c) 2006 Hans Klunder <hans.klunder@bigfoot.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.


use strict;
use warnings;

use IO::Select;
use IO::Socket;
use warnings;
use Data::Dump qw/dump/;
use Convert::ASN1 qw(asn_read);
use Net::LDAP::ASN qw(LDAPRequest LDAPResponse);
our $VERSION = '0.2';
use fields qw(socket target);
use YAML qw/LoadFile/;

sub handle {
        my $clientsocket=shift;
        my $serversocket=shift;

        # read from client
        asn_read($clientsocket, my $reqpdu);
        log_request($reqpdu);

        return 1 unless $reqpdu;

        # send to server
        print $serversocket $reqpdu or die "Could not send PDU to server\n ";
        
        # read from server
        my $ready;
        my $sel = IO::Select->new($serversocket);
        for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) {
                asn_read($serversocket, my $respdu) or return 1;
                $respdu = log_response($respdu);
                # and send the result to the client
                print $clientsocket $respdu;
        }

        return 0;
}


sub log_request {
        my $pdu=shift;

        print '-' x 80,"\n";
        print "Request ASN 1:\n";
        Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
        print "Request Perl:\n";
        my $request = $LDAPRequest->decode($pdu);
        print dump($request);
}

sub log_response {
        my $pdu=shift;

        print '-' x 80,"\n";
        print "Response ASN 1:\n";
        Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
        print "Response Perl:\n";
        my $response = $LDAPResponse->decode($pdu);

        if ( defined $response->{protocolOp}->{searchResEntry} ) {
                my $uid = $response->{protocolOp}->{searchResEntry}->{objectName};
                warn "## SEARCH $uid";

if(0) {
                map {
                        if ( $_->{type} eq 'postalAddress' ) {
                                $_->{vals} = [ 'foobar' ];
                        }
                } @{ $response->{protocolOp}->{searchResEntry}->{attributes} };
}

                my $path = "yaml/$uid.yaml";
                if ( -e $path ) {
                        my $data = LoadFile($path);
                        warn "# yaml = ",dump($data);

                        foreach my $type ( keys %$data ) {

                                my $vals = $data->{$type};
                                $vals =~ s{#\s*$}{};
                                
                                my @vals = split(/\s*#\s*/, $vals);

                                push @{ $response->{protocolOp}->{searchResEntry}->{attributes} },
                                        { type => "ffzg-$type", vals => [ @vals ] };
                        }
                }

                $pdu = $LDAPResponse->encode($response);
        }

        print dump($response);

        return $pdu;
}

sub run_proxy {
        my $listenersock = shift;
        my $targetsock=shift;

        die "Could not create listener socket: $!\n" unless $listenersock;
        die "Could not create connection to server: $!\n" unless $targetsock;

        my $sel = IO::Select->new($listenersock);
        my %Handlers;
        while (my @ready = $sel->can_read) {
                foreach my $fh (@ready) {
                        if ($fh == $listenersock) {
                                # let's create a new socket
                                my $psock = $listenersock->accept;
                                $sel->add($psock);
                        } else {
                                my $result = handle($fh,$targetsock);
                                if ($result) {
                                        # we have finished with the socket
                                        $sel->remove($fh);
                                        $fh->close;
                                        delete $Handlers{*$fh};
                                }
                        }
                }
        }
}


my $listenersock = IO::Socket::INET->new(
        Listen => 5,
        Proto => 'tcp',
        Reuse => 1,
        LocalPort => 1389
);


my $targetsock = new IO::Socket::INET (
        Proto => 'tcp',
        PeerAddr => 'ldap.ffzg.hr',
        PeerPort => 389,
);

run_proxy($listenersock,$targetsock);

1;
1	#!/usr/bin/perl
2	# Copyright (c) 2006 Hans Klunder <hans.klunder@bigfoot.com>. All rights reserved.
3	# This program is free software; you can redistribute it and/or
4	# modify it under the same terms as Perl itself.
5
6
7	use strict;
8	use warnings;
9
10	use IO::Select;
11	use IO::Socket;
12	use warnings;
13	use Data::Dump qw/dump/;
14	use Convert::ASN1 qw(asn_read);
15	use Net::LDAP::ASN qw(LDAPRequest LDAPResponse);
16	our $VERSION = '0.2';
17	use fields qw(socket target);
18	use YAML qw/LoadFile/;
19
20	sub handle {
21	my $clientsocket=shift;
22	my $serversocket=shift;
23
24	# read from client
25	asn_read($clientsocket, my $reqpdu);
26	log_request($reqpdu);
27
28	return 1 unless $reqpdu;
29
30	# send to server
31	print $serversocket $reqpdu or die "Could not send PDU to server\n ";
32
33	# read from server
34	my $ready;
35	my $sel = IO::Select->new($serversocket);
36	for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) {
37	asn_read($serversocket, my $respdu) or return 1;
38	$respdu = log_response($respdu);
39	# and send the result to the client
40	print $clientsocket $respdu;
41	}
42
43	return 0;
44	}
45
46
47	sub log_request {
48	my $pdu=shift;
49
50	print '-' x 80,"\n";
51	print "Request ASN 1:\n";
52	Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
53	print "Request Perl:\n";
54	my $request = $LDAPRequest->decode($pdu);
55	print dump($request);
56	}
57
58	sub log_response {
59	my $pdu=shift;
60
61	print '-' x 80,"\n";
62	print "Response ASN 1:\n";
63	Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
64	print "Response Perl:\n";
65	my $response = $LDAPResponse->decode($pdu);
66
67	if ( defined $response->{protocolOp}->{searchResEntry} ) {
68	my $uid = $response->{protocolOp}->{searchResEntry}->{objectName};
69	warn "## SEARCH $uid";
70
71	if(0) {
72	map {
73	if ( $_->{type} eq 'postalAddress' ) {
74	$_->{vals} = [ 'foobar' ];
75	}
76	} @{ $response->{protocolOp}->{searchResEntry}->{attributes} };
77	}
78
79	my $path = "yaml/$uid.yaml";
80	if ( -e $path ) {
81	my $data = LoadFile($path);
82	warn "# yaml = ",dump($data);
83
84	foreach my $type ( keys %$data ) {
85
86	my $vals = $data->{$type};
87	$vals =~ s{#\s*$}{};
88
89	my @vals = split(/\s#\s/, $vals);
90
91	push @{ $response->{protocolOp}->{searchResEntry}->{attributes} },
92	{ type => "ffzg-$type", vals => [ @vals ] };
93	}
94	}
95
96	$pdu = $LDAPResponse->encode($response);
97	}
98
99	print dump($response);
100
101	return $pdu;
102	}
103
104	sub run_proxy {
105	my $listenersock = shift;
106	my $targetsock=shift;
107
108	die "Could not create listener socket: $!\n" unless $listenersock;
109	die "Could not create connection to server: $!\n" unless $targetsock;
110
111	my $sel = IO::Select->new($listenersock);
112	my %Handlers;
113	while (my @ready = $sel->can_read) {
114	foreach my $fh (@ready) {
115	if ($fh == $listenersock) {
116	# let's create a new socket
117	my $psock = $listenersock->accept;
118	$sel->add($psock);
119	} else {
120	my $result = handle($fh,$targetsock);
121	if ($result) {
122	# we have finished with the socket
123	$sel->remove($fh);
124	$fh->close;
125	delete $Handlers{*$fh};
126	}
127	}
128	}
129	}
130	}
131
132
133	my $listenersock = IO::Socket::INET->new(
134	Listen => 5,
135	Proto => 'tcp',
136	Reuse => 1,
137	LocalPort => 1389
138	);
139
140
141	my $targetsock = new IO::Socket::INET (
142	Proto => 'tcp',
143	PeerAddr => 'ldap.ffzg.hr',
144	PeerPort => 389,
145	);
146
147	run_proxy($listenersock,$targetsock);
148
149	1;