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# This program is free software; you can redistribute it and/or |
# This program is free software; you can redistribute it and/or |
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# modify it under the same terms as Perl itself. |
# modify it under the same terms as Perl itself. |
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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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use strict; |
use strict; |
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use warnings; |
use warnings; |
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use IO::Select; |
use IO::Select; |
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use IO::Socket; |
use IO::Socket; |
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use IO::Socket::SSL; |
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use warnings; |
use warnings; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use Convert::ASN1 qw(asn_read); |
use Convert::ASN1 qw(asn_read); |
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use Net::LDAP::ASN qw(LDAPRequest LDAPResponse); |
use Net::LDAP::ASN qw(LDAPRequest LDAPResponse); |
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our $VERSION = '0.2'; |
our $VERSION = '0.3'; |
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use fields qw(socket target); |
use fields qw(socket target); |
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use YAML qw/LoadFile/; |
use YAML qw/LoadFile/; |
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my $debug = 0; |
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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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my $log_fh; |
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sub log { |
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return unless $config->{log_file}; |
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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 $log_fh join("\n", @_),"\n"; |
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} |
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BEGIN { |
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$SIG{'__WARN__'} = sub { warn @_; main::log(@_); } |
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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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warn "# config = ",dump( $config ); |
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sub handle { |
sub handle { |
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my $clientsocket=shift; |
my $clientsocket=shift; |
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my $serversocket=shift; |
my $serversocket=shift; |
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|
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# read from client |
# read from client |
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asn_read($clientsocket, my $reqpdu); |
asn_read($clientsocket, my $reqpdu); |
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log_request($reqpdu); |
if ( ! $reqpdu ) { |
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warn "client closed connection\n"; |
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return 1 unless $reqpdu; |
return 0; |
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} |
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$reqpdu = log_request($reqpdu); |
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|
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# send to server |
# send to server |
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print $serversocket $reqpdu or die "Could not send PDU to server\n "; |
print $serversocket $reqpdu or die "Could not send PDU to server\n "; |
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my $ready; |
my $ready; |
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my $sel = IO::Select->new($serversocket); |
my $sel = IO::Select->new($serversocket); |
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for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) { |
for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) { |
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asn_read($serversocket, my $respdu) or return 1; |
asn_read($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); |
$respdu = log_response($respdu); |
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# and send the result to the client |
# and send the result to the client |
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print $clientsocket $respdu; |
print $clientsocket $respdu || return 0; |
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} |
} |
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return 0; |
return 1; |
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} |
} |
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sub log_request { |
sub log_request { |
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my $pdu=shift; |
my $pdu=shift; |
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print '-' x 80,"\n"; |
die "empty pdu" unless $pdu; |
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print "Request ASN 1:\n"; |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
# print '-' x 80,"\n"; |
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print "Request Perl:\n"; |
# 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); |
my $request = $LDAPRequest->decode($pdu); |
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print dump($request); |
warn "## request = ",dump($request); |
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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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return $pdu; |
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} |
} |
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sub log_response { |
sub log_response { |
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my $pdu=shift; |
my $pdu=shift; |
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die "empty pdu" unless $pdu; |
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print '-' x 80,"\n"; |
# print '-' x 80,"\n"; |
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print "Response ASN 1:\n"; |
# print "Response ASN 1:\n"; |
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Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
# Convert::ASN1::asn_hexdump(\*STDOUT,$pdu); |
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print "Response Perl:\n"; |
# print "Response Perl:\n"; |
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my $response = $LDAPResponse->decode($pdu); |
my $response = $LDAPResponse->decode($pdu); |
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if ( defined $response->{protocolOp}->{searchResEntry} ) { |
if ( defined $response->{protocolOp}->{searchResEntry} ) { |
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my $uid = $response->{protocolOp}->{searchResEntry}->{objectName}; |
my $uid = $response->{protocolOp}->{searchResEntry}->{objectName}; |
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warn "## SEARCH $uid"; |
warn "## objectName $uid"; |
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my @attrs; |
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if(0) { |
foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) { |
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map { |
if ( $attr->{type} =~ m/date/i ) { |
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if ( $_->{type} eq 'postalAddress' ) { |
foreach my $i ( 0 .. $#{ $attr->{vals} } ) { |
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$_->{vals} = [ 'foobar' ]; |
$attr->{vals}->[$i] = "$1-$2-$3" if $attr->{vals}->[$i] =~ m/^([12]\d\d\d)([01]\d+)([123]\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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} |
} |
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} @{ $response->{protocolOp}->{searchResEntry}->{attributes} }; |
} |
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} |
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warn "# ++ attrs ",dump( @attrs ); |
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my $path = "yaml/$uid.yaml"; |
push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs; |
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my $path = $config->{yaml_dir} . "$uid.yaml"; |
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if ( -e $path ) { |
if ( -e $path ) { |
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my $data = LoadFile($path); |
my $data = LoadFile($path); |
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warn "# yaml = ",dump($data); |
warn "# yaml = ",dump($data); |
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foreach my $type ( keys %$data ) { |
foreach my $type ( keys %$data ) { |
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my $vals = $data->{$type}; |
my $vals = $data->{$type}; |
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$vals =~ s{#\s*$}{}; |
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my @vals = split(/\s*#\s*/, $vals); |
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push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, |
push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, { |
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{ type => "ffzg-$type", vals => [ @vals ] }; |
type => $config->{overlay_prefix} . $type, |
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vals => ref($vals) eq 'ARRAY' ? $vals : [ $vals ], |
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}; |
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} |
} |
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} |
} |
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$pdu = $LDAPResponse->encode($response); |
$pdu = $LDAPResponse->encode($response); |
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} |
} |
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print dump($response); |
warn "## response = ", dump($response); |
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return $pdu; |
return $pdu; |
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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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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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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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my $listenersock = IO::Socket::INET->new( |
my $listenersock = IO::Socket::INET->new( |
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Listen => 5, |
Listen => 5, |
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Proto => 'tcp', |
Proto => 'tcp', |
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Reuse => 1, |
Reuse => 1, |
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LocalPort => 1389 |
LocalAddr => $config->{listen}, |
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); |
) || die "can't open listen socket: $!"; |
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our $server_sock; |
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my $targetsock = new IO::Socket::INET ( |
sub connect_to_server { |
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Proto => 'tcp', |
my $sock; |
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PeerAddr => 'ldap.ffzg.hr', |
if ( $config->{upstream_ssl} ) { |
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PeerPort => 389, |
$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 $sock; |
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} |
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run_proxy($listenersock,$targetsock); |
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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1; |
1; |