--- /dev/null
+#!/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.
+
+# It's modified by Dobrica Pavlinusic <dpavlin@rot13.org> to include following:
+#
+# * rewrite LDAP bind request cn: username@domain.com -> uid=username,dc=domain,dc=com
+# * rewrite search responses:
+# ** expand key:value pairs from hrEduPersonUniqueNumber into hrEduPersonUniqueNumber_key
+# ** augment response with yaml/dn.yaml data (for external data import)
+
+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 = '0.3';
+use fields qw(socket target);
+use YAML qw/LoadFile/;
+
+my $debug = $ENV{DEBUG} || 0;
+$|=1; # flush STDOUT
+
+my $config = {
+ yaml_dir => './yaml/',
+ listen => shift @ARGV || 'localhost:1389',
+ upstream_ldap => 'ldap.ffzg.hr',
+ upstream_ssl => 1,
+ overlay_prefix => 'ffzg-',
+# log_file => 'log/ldap-rewrite.log',
+
+};
+
+my $log_fh;
+
+sub log {
+ my $level = $1 if $_[0] =~ m/^(#+)/;
+ return if defined($level) && length($level) > $debug;
+
+ warn join("\n", @_);
+
+ return unless $config->{log_file};
+
+ if ( ! $log_fh ) {
+ open($log_fh, '>>', $config->{log_file}) || die "can't open ", $config->{log_file},": $!";
+ print $log_fh "# " . time;
+ }
+ $log_fh->autoflush(1);
+ print $log_fh join("\n", @_),"\n";
+}
+
+BEGIN {
+ $SIG{'__WARN__'} = sub { main::log(@_); }
+}
+
+
+if ( ! -d $config->{yaml_dir} ) {
+ warn "DISABLE ", $config->{yaml_dir}," data overlay";
+}
+
+warn "# config = ",dump( $config );
+
+sub h2str {
+ my $str = dump(@_);
+ $str =~ s/\s//g;
+ return $str;
+}
+
+my $last_reqpdu = '';
+my $last_respdu;
+
+sub handle {
+ my $clientsocket=shift;
+ my $serversocket=shift;
+
+ # read from client
+ asn_read($clientsocket, my $reqpdu);
+ if ( ! $reqpdu ) {
+ warn "# client closed connection\n";
+ return 0;
+ }
+
+ if ( h2str($reqpdu) eq $last_reqpdu ) {
+ warn "# cache hit";
+ print $clientsocket $last_respdu || return 0;
+ return 1;
+ }
+
+ my $request = $LDAPRequest->decode($reqpdu);
+ warn "## request = ",dump($request);
+
+ my $request_filter;
+ if (
+ exists $request->{searchRequest} &&
+ exists $request->{searchRequest}->{filter}
+ ) {
+ my $filter = dump($request->{searchRequest}->{filter});
+ $filter =~ s/\s\s+/ /gs;
+
+ warn "# FILTER $filter";
+ if ( $filter =~ m/(attributeDesc => "uid")/ ) { # mark uid serach from roundcube for new_user_identity
+ warn "filter uid $1";
+ $request_filter->{uid} = 1;
+ }
+ if ( $filter =~ m/(present => "jpegphoto")/ ) {
+ warn "hard-coded response for $1";
+ print $clientsocket $LDAPResponse->encode( {
+ messageID => $request->{messageID},
+ searchResDone => { errorMessage => "", matchedDN => "", resultCode => 0 },
+ } ) || return 0;
+ return 1;
+ }
+ }
+
+ $reqpdu = modify_request($reqpdu, $request);
+
+ # 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);
+ if ( ! $respdu ) {
+ warn "server closed connection\n";
+ return 0;
+ }
+
+ $respdu = modify_response($respdu, $reqpdu, $request, $request_filter);
+
+ # cache
+ $last_reqpdu = h2str($request->{searchRequest});
+ warn "# last_reqpdu $last_reqpdu";
+ $last_respdu = $respdu;
+
+ # and send the result to the client
+ print $clientsocket $respdu || return 0;
+
+
+ }
+
+ return 1;
+}
+
+sub modify_request {
+ my ($pdu,$request)=@_;
+
+ die "empty pdu" unless $pdu;
+
+# print '-' x 80,"\n";
+# print "Request ASN 1:\n";
+# Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
+# print "Request Perl:\n";
+ if ( defined $request->{bindRequest} ) {
+ if ( $request->{bindRequest}->{name} =~ m{@} ) {
+ my $old = $request->{bindRequest}->{name};
+ $request->{bindRequest}->{name} =~ s/[@\.]/,dc=/g;
+ $request->{bindRequest}->{name} =~ s/^/uid=/;
+ print "rewrite bind cn $old -> ", $request->{bindRequest}->{name}, "\n";
+ Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug;
+ $pdu = $LDAPRequest->encode($request);
+ Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug;
+ }
+ }
+
+ return $pdu;
+}
+
+sub modify_response {
+ my ($pdu,$reqpdu,$request,$request_filter)=@_;
+ die "empty pdu" unless $pdu;
+
+# print '-' x 80,"\n";
+# print "Response ASN 1:\n";
+# Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
+# print "Response Perl:\n";
+ my $response = $LDAPResponse->decode($pdu);
+
+ if ( defined $response->{protocolOp}->{searchResEntry} ) {
+ my $uid = $response->{protocolOp}->{searchResEntry}->{objectName};
+ warn "# rewrite objectName $uid\n";
+
+ my @attrs;
+
+ foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) {
+ if ( $attr->{type} =~ m/date/i ) {
+ foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
+ $attr->{vals}->[$i] = "$1-$2-$3" if $attr->{vals}->[$i] =~ m/^([12]\d\d\d)([01]\d+)([0123]\d+)$/;
+ }
+=for disable
+ } elsif ( $attr->{type} eq 'hrEduPersonUniqueNumber' ) {
+ foreach my $val ( @{ $attr->{vals} } ) {
+ next if $val !~ m{.+:.+};
+ my ( $n, $v ) = split(/\s*:\s*/, $val );
+ push @attrs, { type => $attr->{type} . '_' . $n, vals => [ $v ] };
+ }
+ } elsif ( $attr->{type} eq 'hrEduPersonGroupMember' ) {
+ foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
+ $attr->{vals}->[$i] =~ s/^u2010/p2010/gs && warn "FIXME group";
+ }
+ } elsif ( $attr->{type} eq 'homePostalAddress' ) {
+ foreach my $val ( @{ $attr->{vals} } ) {
+ next if $val !~ m{^(.+)\s*,\s*(\d+)\s+(.+)};
+ push @attrs,
+ { type => 'homePostalAddress_address', vals => [ $1 ] },
+ { type => 'homePostalAddress_zipcode', vals => [ $2 ] },
+ { type => 'homePostalAddress_city', vals => [ $3 ] };
+ }
+ } elsif ( $attr->{type} eq 'mail' ) {
+ my @emails;
+ foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
+ my $e = $attr->{vals}->[$i];
+ if ( $e =~ m/\s+/ ) {
+ push @emails, split(/\s+/, $e);
+ } else {
+ push @emails, $e;
+ }
+ }
+ $attr->{vals} = [ shift @emails ];
+ foreach my $i ( 0 .. $#emails ) {
+ push @attrs, { type => $attr->{type} . '_' . ( $i + 1 ) , vals => [ $emails[$i] ] };
+ }
+=cut
+ } elsif ( $attr->{type} eq 'mail' ) {
+ my @emails;
+ foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
+ my $e = $attr->{vals}->[$i];
+ if ( $e =~ m/\s+/ ) {
+ push @emails, split(/\s+/, $e);
+ } else {
+ push @emails, $e;
+ }
+ }
+ if ( $request_filter->{uid} ) { # only for new_user_identity plugin which does uid search
+ $attr->{vals} = [ grep { m/\@ffzg/ } @emails ]; # remote all emails not @ffzg.hr @ffzg.unizg.hr
+ }
+ } elsif ( $attr->{type} eq 'facsimileTelephoneNumber' ) {
+ my @fax;
+ foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
+ my $e = $attr->{vals}->[$i];
+ push @fax, $e;
+ }
+ $attr->{vals} = [ grep { ! m/\Q+385 xx xxxx xxx\E/ } @fax ];
+ }
+ }
+
+ warn "# ++ attrs ",dump( @attrs );
+
+ push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs;
+
+=for removed
+ my @additional_yamls = ( $uid );
+ foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) {
+ foreach my $v ( @{ $attr->{vals} } ) {
+ push @additional_yamls, $attr->{type} . '/' . $v;
+ }
+ }
+
+ #warn "# additional_yamls ",dump( @additional_yamls );
+
+ foreach my $path ( @additional_yamls ) {
+ my $full_path = $config->{yaml_dir} . '/' . $path . '.yaml';
+ next unless -e $full_path;
+
+ my $data = LoadFile( $full_path );
+ warn "# $full_path yaml = ",dump($data);
+
+ foreach my $type ( keys %$data ) {
+
+ my $vals = $data->{$type};
+
+ push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, {
+ type => $config->{overlay_prefix} . $type,
+ vals => ref($vals) eq 'ARRAY' ? $vals : [ $vals ],
+ };
+ }
+ }
+=cut
+
+ $pdu = $LDAPResponse->encode($response);
+ }
+
+ warn "## response = ", dump($response);
+
+ return $pdu;
+}
+
+
+my $listenersock = IO::Socket::INET->new(
+ Listen => 5,
+ Proto => 'tcp',
+ Reuse => 1,
+ LocalAddr => $config->{listen},
+) || die "can't open listen socket: $!";
+
+our $server_sock;
+
+sub connect_to_server {
+ my $sock;
+ if ( $config->{upstream_ssl} ) {
+ $sock = IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps' );
+ } else {
+ $sock = IO::Socket::INET->new(
+ Proto => 'tcp',
+ PeerAddr => $config->{upstream_ldap},
+ PeerPort => 389,
+ );
+ }
+ die "can't open ", $config->{upstream_ldap}, " $!\n" unless $sock;
+ warn "## connected to ", $sock->peerhost, ":", $sock->peerport, "\n";
+ return $sock;
+}
+
+my $sel = IO::Select->new($listenersock);
+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);
+ warn "## add $psock " . time;
+ } else {
+ $server_sock->{$fh} ||= connect_to_server;
+ if ( ! handle($fh,$server_sock->{$fh}) ) {
+ warn "## remove $fh " . time;
+ $sel->remove($server_sock->{$fh});
+ $server_sock->{$fh}->close;
+ delete $server_sock->{$fh};
+ # we have finished with the socket
+ $sel->remove($fh);
+ $fh->close;
+ }
+ }
+ }
+}
+
+1;
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