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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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# It's modified by Dobrica Pavlinusic <dpavlin@rot13.org> to include following: |
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# |
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# * rewrite LDAP bind request cn: username@domain.com -> uid=username,dc=domain,dc=com |
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# * rewrite search responses: |
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# ** expand key:value pairs from hrEduPersonUniqueNumber into hrEduPersonUniqueNumber_key |
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# ** augment response with yaml/dn.yaml data (for external data import) |
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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 = '0.3'; |
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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 $debug = 0; |
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|
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my $config = { |
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yaml_dir => './yaml/', |
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listen => shift @ARGV || '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/ldap-rewrite.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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return unless $config->{log_file}; |
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|
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if ( ! $log_fh ) { |
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open($log_fh, '>>', $config->{log_file}) || die "can't open ", $config->{log_file},": $!"; |
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print $log_fh "# " . time; |
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} |
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$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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if ( ! $reqpdu ) { |
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warn "client closed connection\n"; |
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return 0; |
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} |
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$reqpdu = log_request($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); |
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if ( ! $respdu ) { |
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warn "server closed connection\n"; |
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return 0; |
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} |
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$respdu = log_response($respdu); |
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# and send the result to the client |
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print $clientsocket $respdu || return 0; |
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} |
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|
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return 1; |
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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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die "empty pdu" unless $pdu; |
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|
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# print '-' x 80,"\n"; |
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# print "Request ASN 1:\n"; |
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# Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
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# print "Request Perl:\n"; |
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my $request = $LDAPRequest->decode($pdu); |
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warn "## request = ",dump($request); |
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|
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if ( defined $request->{bindRequest} ) { |
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if ( $request->{bindRequest}->{name} =~ m{@} ) { |
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my $old = $request->{bindRequest}->{name}; |
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$request->{bindRequest}->{name} =~ s/[@\.]/,dc=/g; |
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$request->{bindRequest}->{name} =~ s/^/uid=/; |
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warn "rewrite bind cn $old -> ", $request->{bindRequest}->{name}; |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug; |
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$pdu = $LDAPRequest->encode($request); |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug; |
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} |
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} |
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|
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return $pdu; |
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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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die "empty pdu" unless $pdu; |
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|
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# print '-' x 80,"\n"; |
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# print "Response ASN 1:\n"; |
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# Convert::ASN1::asn_hexdump(\*STDOUT,$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 "## objectName $uid"; |
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|
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my @attrs; |
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|
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foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) { |
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if ( $attr->{type} =~ m/date/i ) { |
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foreach my $i ( 0 .. $#{ $attr->{vals} } ) { |
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$attr->{vals}->[$i] = "$1-$2-$3" if $attr->{vals}->[$i] =~ m/^([12]\d\d\d)([01]\d+)([0123]\d+)$/; |
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} |
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} elsif ( $attr->{type} eq 'hrEduPersonUniqueNumber' ) { |
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foreach my $val ( @{ $attr->{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 => $attr->{type} . '_' . $n, vals => [ $v ] }; |
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} |
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} elsif ( $attr->{type} eq 'hrEduPersonGroupMember' ) { |
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foreach my $i ( 0 .. $#{ $attr->{vals} } ) { |
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$attr->{vals}->[$i] =~ s/^u2010/p2010/gs && warn "FIXME group"; |
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} |
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} |
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} |
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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 @additional_yamls = ( $uid ); |
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foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) { |
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foreach my $v ( @{ $attr->{vals} } ) { |
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push @additional_yamls, $attr->{type} . '/' . $v; |
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} |
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} |
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|
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#warn "# additional_yamls ",dump( @additional_yamls ); |
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|
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foreach my $path ( @additional_yamls ) { |
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my $full_path = $config->{yaml_dir} . '/' . $path . '.yaml'; |
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next unless -e $full_path; |
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|
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my $data = LoadFile( $full_path ); |
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warn "# $full_path yaml = ",dump($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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warn "## response = ", dump($response); |
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|
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return $pdu; |
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} |
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|
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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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) || die "can't open listen socket: $!"; |
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|
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our $server_sock; |
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|
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sub connect_to_server { |
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my $sock; |
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if ( $config->{upstream_ssl} ) { |
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$sock = IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps' ); |
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} else { |
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$sock = 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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} |
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die "can't open ", $config->{upstream_ldap}, " $!\n" unless $sock; |
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warn "## connected to ", $sock->peerhost, ":", $sock->peerport, "\n"; |
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return $sock; |
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} |
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|
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my $sel = IO::Select->new($listenersock); |
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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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warn "## add $psock " . time; |
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} else { |
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$server_sock->{$fh} ||= connect_to_server; |
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if ( ! handle($fh,$server_sock->{$fh}) ) { |
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warn "## remove $fh " . time; |
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$sel->remove($server_sock->{$fh}); |
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$server_sock->{$fh}->close; |
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delete $server_sock->{$fh}; |
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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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} |
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} |
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} |
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} |
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|
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1; |