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 IO::Socket::SSL;
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/;

my $config = {
        yaml_dir => './yaml/',
        listen => 'localhost:1389',
        upstream_ldap => 'ldap.ffzg.hr',
        upstream_ssl => 1,
        overlay_prefix => 'ffzg-',

};

if ( ! -d $config->{yaml_dir} ) {
        warn "DISABLE ", $config->{yaml_dir}," data overlay";
}

warn "# config = ",dump( $config );

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";

                my @attrs;

                map {
                        if ( $_->{type} eq 'hrEduPersonUniqueNumber' ) {
                                foreach my $val ( @{ $_->{vals} } ) {
                                        next if $val !~ m{.+:.+};
                                        my ( $n, $v ) = split(/\s*:\s*/, $val );
                                        push @attrs, { type => $_->{type} . '_' . $n, vals => [ $v ] };
                                }
                        }
                } @{ $response->{protocolOp}->{searchResEntry}->{attributes} };

                warn "# ++ attrs ",dump( @attrs );

                push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs;

                my $path = $config->{yaml_dir} . "$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 => $config->{overlay_prefix} . $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,
        LocalAddr => $config->{listen},
);


my $targetsock = $config->{upstream_ssl}
        ? IO::Socket::INET->new(
                Proto => 'tcp',
                PeerAddr => $config->{upstream_ldap},
                PeerPort => 389,
        )
        : IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps')
        ;

run_proxy($listenersock,$targetsock);

1;
1	dpavlin	8	#!/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	dpavlin	16	use IO::Socket::SSL;
13	dpavlin	8	use warnings;
14			use Data::Dump qw/dump/;
15			use Convert::ASN1 qw(asn_read);
16			use Net::LDAP::ASN qw(LDAPRequest LDAPResponse);
17			our $VERSION = '0.2';
18			use fields qw(socket target);
19	dpavlin	10	use YAML qw/LoadFile/;
20	dpavlin	8
21	dpavlin	18	my $config = {
22			yaml_dir => './yaml/',
23			listen => 'localhost:1389',
24			upstream_ldap => 'ldap.ffzg.hr',
25			upstream_ssl => 1,
26			overlay_prefix => 'ffzg-',
27
28			};
29
30			if ( ! -d $config->{yaml_dir} ) {
31			warn "DISABLE ", $config->{yaml_dir}," data overlay";
32			}
33
34			warn "# config = ",dump( $config );
35
36	dpavlin	8	sub handle {
37			my $clientsocket=shift;
38			my $serversocket=shift;
39
40			# read from client
41			asn_read($clientsocket, my $reqpdu);
42			log_request($reqpdu);
43
44			return 1 unless $reqpdu;
45
46			# send to server
47			print $serversocket $reqpdu or die "Could not send PDU to server\n ";
48
49			# read from server
50			my $ready;
51			my $sel = IO::Select->new($serversocket);
52			for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) {
53			asn_read($serversocket, my $respdu) or return 1;
54			$respdu = log_response($respdu);
55			# and send the result to the client
56			print $clientsocket $respdu;
57			}
58
59			return 0;
60			}
61
62
63			sub log_request {
64			my $pdu=shift;
65
66			print '-' x 80,"\n";
67			print "Request ASN 1:\n";
68			Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
69			print "Request Perl:\n";
70			my $request = $LDAPRequest->decode($pdu);
71			print dump($request);
72			}
73
74			sub log_response {
75			my $pdu=shift;
76
77			print '-' x 80,"\n";
78			print "Response ASN 1:\n";
79			Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
80			print "Response Perl:\n";
81			my $response = $LDAPResponse->decode($pdu);
82
83			if ( defined $response->{protocolOp}->{searchResEntry} ) {
84			my $uid = $response->{protocolOp}->{searchResEntry}->{objectName};
85			warn "## SEARCH $uid";
86	dpavlin	10
87	dpavlin	19	my @attrs;
88
89	dpavlin	8	map {
90	dpavlin	19	if ( $_->{type} eq 'hrEduPersonUniqueNumber' ) {
91			foreach my $val ( @{ $_->{vals} } ) {
92			next if $val !~ m{.+:.+};
93			my ( $n, $v ) = split(/\s:\s/, $val );
94			push @attrs, { type => $_->{type} . '_' . $n, vals => [ $v ] };
95			}
96	dpavlin	8	}
97			} @{ $response->{protocolOp}->{searchResEntry}->{attributes} };
98
99	dpavlin	19	warn "# ++ attrs ",dump( @attrs );
100
101			push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs;
102
103	dpavlin	18	my $path = $config->{yaml_dir} . "$uid.yaml";
104	dpavlin	10	if ( -e $path ) {
105			my $data = LoadFile($path);
106			warn "# yaml = ",dump($data);
107	dpavlin	8
108	dpavlin	10	foreach my $type ( keys %$data ) {
109
110			my $vals = $data->{$type};
111			$vals =~ s{#\s*$}{};
112
113			my @vals = split(/\s#\s/, $vals);
114
115			push @{ $response->{protocolOp}->{searchResEntry}->{attributes} },
116	dpavlin	18	{ type => $config->{overlay_prefix} . $type, vals => [ @vals ] };
117	dpavlin	10	}
118			}
119
120	dpavlin	8	$pdu = $LDAPResponse->encode($response);
121			}
122
123	dpavlin	10	print dump($response);
124
125	dpavlin	8	return $pdu;
126			}
127
128			sub run_proxy {
129			my $listenersock = shift;
130			my $targetsock=shift;
131
132			die "Could not create listener socket: $!\n" unless $listenersock;
133			die "Could not create connection to server: $!\n" unless $targetsock;
134
135			my $sel = IO::Select->new($listenersock);
136			my %Handlers;
137			while (my @ready = $sel->can_read) {
138			foreach my $fh (@ready) {
139			if ($fh == $listenersock) {
140			# let's create a new socket
141			my $psock = $listenersock->accept;
142			$sel->add($psock);
143			} else {
144			my $result = handle($fh,$targetsock);
145			if ($result) {
146			# we have finished with the socket
147			$sel->remove($fh);
148			$fh->close;
149			delete $Handlers{*$fh};
150			}
151			}
152			}
153			}
154			}
155
156
157			my $listenersock = IO::Socket::INET->new(
158			Listen => 5,
159			Proto => 'tcp',
160			Reuse => 1,
161	dpavlin	18	LocalAddr => $config->{listen},
162	dpavlin	8	);
163
164
165	dpavlin	18	my $targetsock = $config->{upstream_ssl}
166			? IO::Socket::INET->new(
167			Proto => 'tcp',
168			PeerAddr => $config->{upstream_ldap},
169			PeerPort => 389,
170			)
171			: IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps')
172			;
173	dpavlin	8
174			run_proxy($listenersock,$targetsock);
175
176			1;