git.rot13.org Git - virtual-ldap/blob - bin/ldap-roundcube.pl

   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 # It's modified by Dobrica Pavlinusic <dpavlin@rot13.org> to include following:
   7 #
   8 # * rewrite LDAP bind request cn: username@domain.com -> uid=username,dc=domain,dc=com
   9 # * rewrite search responses:
  10 # ** expand key:value pairs from hrEduPersonUniqueNumber into hrEduPersonUniqueNumber_key
  11 # ** augment response with yaml/dn.yaml data (for external data import)
  12
  13 use strict;
  14 use warnings;
  15
  16 use IO::Select;
  17 use IO::Socket;
  18 use IO::Socket::SSL;
  19 use warnings;
  20 use Data::Dump qw/dump/;
  21 use Convert::ASN1 qw(asn_read);
  22 use Net::LDAP::ASN qw(LDAPRequest LDAPResponse);
  23 our $VERSION = '0.3';
  24 use fields qw(socket target);
  25 use YAML qw/LoadFile/;
  26
  27 my $debug = $ENV{DEBUG} || 0;
  28 $|=1; # flush STDOUT
  29
  30 my $config = {
  31         yaml_dir => './yaml/',
  32         listen => shift @ARGV || 'localhost:1389',
  33         upstream_ldap => 'ldap.ffzg.hr',
  34         upstream_ssl => 1,
  35         overlay_prefix => 'ffzg-',
  36 #       log_file => 'log/ldap-rewrite.log',
  37
  38 };
  39
  40 my $log_fh;
  41
  42 sub log {
  43         my $level = $1 if $_[0] =~ m/^(#+)/;
  44         return if defined($level) && length($level) > $debug;
  45
  46         warn join("\n", @_);
  47
  48         return unless $config->{log_file};
  49
  50         if ( ! $log_fh ) {
  51                 open($log_fh, '>>', $config->{log_file}) || die "can't open ", $config->{log_file},": $!";
  52                 print $log_fh "# " . time;
  53         }
  54         $log_fh->autoflush(1);
  55         print $log_fh join("\n", @_),"\n";
  56 }
  57
  58 BEGIN {
  59         $SIG{'__WARN__'} = sub { main::log(@_); }
  60 }
  61
  62
  63 if ( ! -d $config->{yaml_dir} ) {
  64         warn "DISABLE ", $config->{yaml_dir}," data overlay";
  65 }
  66
  67 warn "# config = ",dump( $config );
  68
  69 sub handle {
  70         my $clientsocket=shift;
  71         my $serversocket=shift;
  72
  73         # read from client
  74         asn_read($clientsocket, my $reqpdu);
  75         if ( ! $reqpdu ) {
  76                 warn "# client closed connection\n";
  77                 return 0;
  78         }
  79         $reqpdu = log_request($reqpdu);
  80
  81         # send to server
  82         print $serversocket $reqpdu or die "Could not send PDU to server\n ";
  83
  84         # read from server
  85         my $ready;
  86         my $sel = IO::Select->new($serversocket);
  87         for( $ready = 1 ; $ready ; $ready = $sel->can_read(0)) {
  88                 asn_read($serversocket, my $respdu);
  89                 if ( ! $respdu ) {
  90                         warn "server closed connection\n";
  91                         return 0;
  92                 }
  93                 $respdu = log_response($respdu, $reqpdu);
  94                 # and send the result to the client
  95                 print $clientsocket $respdu || return 0;
  96         }
  97
  98         return 1;
  99 }
 100
 101
 102 sub log_request {
 103         my $pdu=shift;
 104
 105         die "empty pdu" unless $pdu;
 106
 107 #       print '-' x 80,"\n";
 108 #       print "Request ASN 1:\n";
 109 #       Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
 110 #       print "Request Perl:\n";
 111         my $request = $LDAPRequest->decode($pdu);
 112         warn "## request = ",dump($request);
 113
 114         if ( defined $request->{bindRequest} ) {
 115                 if ( $request->{bindRequest}->{name} =~ m{@} ) {
 116                         my $old = $request->{bindRequest}->{name};
 117                         $request->{bindRequest}->{name} =~ s/[@\.]/,dc=/g;
 118                         $request->{bindRequest}->{name} =~ s/^/uid=/;
 119                         print "rewrite bind cn $old -> ", $request->{bindRequest}->{name}, "\n";
 120                         Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug;
 121                         $pdu = $LDAPRequest->encode($request);
 122                         Convert::ASN1::asn_hexdump(\*STDOUT,$pdu) if $debug;
 123                 }
 124         }
 125
 126         return $pdu;
 127 }
 128
 129 sub log_response {
 130         my ($pdu,$reqpdu)=@_;
 131         die "empty pdu" unless $pdu;
 132
 133         my $search_uid = 0;
 134         my $request = $LDAPRequest->decode($reqpdu);
 135         if ( exists $request->{searchRequest}->{filter} ) {
 136                 my $filter = dump($request->{searchRequest}->{filter});
 137 warn "XXX $filter";
 138                 if ( $filter =~ m/attributeDesc => "uid"/ ) {
 139                         warn "got uid search";
 140                         $search_uid = 1;
 141                 }
 142         }
 143
 144 #       print '-' x 80,"\n";
 145 #       print "Response ASN 1:\n";
 146 #       Convert::ASN1::asn_hexdump(\*STDOUT,$pdu);
 147 #       print "Response Perl:\n";
 148         my $response = $LDAPResponse->decode($pdu);
 149
 150         if ( defined $response->{protocolOp}->{searchResEntry} ) {
 151                 my $uid = $response->{protocolOp}->{searchResEntry}->{objectName};
 152                 warn "# rewrite objectName $uid\n";
 153
 154                 my @attrs;
 155
 156                 foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) {
 157                         if ( $attr->{type} =~ m/date/i ) {
 158                                 foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
 159                                         $attr->{vals}->[$i] = "$1-$2-$3" if $attr->{vals}->[$i] =~ m/^([12]\d\d\d)([01]\d+)([0123]\d+)$/;
 160                                 }
 161 =for disable
 162                         } elsif ( $attr->{type} eq 'hrEduPersonUniqueNumber' ) {
 163                                 foreach my $val ( @{ $attr->{vals} } ) {
 164                                         next if $val !~ m{.+:.+};
 165                                         my ( $n, $v ) = split(/\s*:\s*/, $val );
 166                                         push @attrs, { type => $attr->{type} . '_' . $n, vals => [ $v ] };
 167                                 }
 168                         } elsif ( $attr->{type} eq 'hrEduPersonGroupMember' ) {
 169                                 foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
 170                                         $attr->{vals}->[$i] =~ s/^u2010/p2010/gs && warn "FIXME group";
 171                                 }
 172                         } elsif ( $attr->{type} eq 'homePostalAddress' ) {
 173                                 foreach my $val ( @{ $attr->{vals} } ) {
 174                                         next if $val !~ m{^(.+)\s*,\s*(\d+)\s+(.+)};
 175                                         push @attrs,
 176                                                 { type => 'homePostalAddress_address', vals => [ $1 ] },
 177                                                 { type => 'homePostalAddress_zipcode', vals => [ $2 ] },
 178                                                 { type => 'homePostalAddress_city', vals => [ $3 ] };
 179                                 }
 180                         } elsif ( $attr->{type} eq 'mail' ) {
 181                                 my @emails;
 182                                 foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
 183                                         my $e = $attr->{vals}->[$i];
 184                                         if ( $e =~ m/\s+/ ) {
 185                                                 push @emails, split(/\s+/, $e);
 186                                         } else {
 187                                                 push @emails, $e;
 188                                         }
 189                                 }
 190                                 $attr->{vals} = [ shift @emails ];
 191                                 foreach my $i ( 0 .. $#emails ) {
 192                                         push @attrs, { type => $attr->{type} . '_' . ( $i + 1 ) , vals => [ $emails[$i] ] };
 193                                 }
 194 =cut
 195                         } elsif ( $attr->{type} eq 'mail' ) {
 196                                 my @emails;
 197                                 foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
 198                                         my $e = $attr->{vals}->[$i];
 199                                         if ( $e =~ m/\s+/ ) {
 200                                                 push @emails, split(/\s+/, $e);
 201                                         } else {
 202                                                 push @emails, $e;
 203                                         }
 204                                 }
 205                                 if ( $search_uid ) {    # only for new_user_identity plugin which does uid search
 206                                         $attr->{vals} = [ grep { m/\@ffzg/ } @emails ]; # remote all emails not @ffzg.hr @ffzg.unizg.hr
 207                                 }
 208                         } elsif ( $attr->{type} eq 'facsimileTelephoneNumber' ) {
 209                                 my @fax;
 210                                 foreach my $i ( 0 .. $#{ $attr->{vals} } ) {
 211                                         my $e = $attr->{vals}->[$i];
 212                                         push @fax, $e;
 213                                 }
 214                                 $attr->{vals} = [ grep { ! m/\Q+385 xx xxxx xxx\E/ } @fax ];
 215                         }
 216                 }
 217
 218                 warn "# ++ attrs ",dump( @attrs );
 219
 220                 push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, $_ foreach @attrs;
 221
 222 =for removed
 223                 my @additional_yamls = ( $uid );
 224                 foreach my $attr ( @{ $response->{protocolOp}->{searchResEntry}->{attributes} } ) {
 225                         foreach my $v ( @{ $attr->{vals} } ) {
 226                                 push @additional_yamls, $attr->{type} . '/' . $v;
 227                         }
 228                 }
 229
 230                 #warn "# additional_yamls ",dump( @additional_yamls );
 231
 232                 foreach my $path ( @additional_yamls ) {
 233                         my $full_path = $config->{yaml_dir} . '/' . $path . '.yaml';
 234                         next unless -e $full_path;
 235
 236                         my $data = LoadFile( $full_path );
 237                         warn "# $full_path yaml = ",dump($data);
 238
 239                         foreach my $type ( keys %$data ) {
 240
 241                                 my $vals = $data->{$type};
 242
 243                                 push @{ $response->{protocolOp}->{searchResEntry}->{attributes} }, {
 244                                         type => $config->{overlay_prefix} . $type,
 245                                         vals => ref($vals) eq 'ARRAY' ? $vals : [ $vals ],
 246                                 };
 247                         }
 248                 }
 249 =cut
 250
 251                 $pdu = $LDAPResponse->encode($response);
 252         }
 253
 254         warn "## response = ", dump($response);
 255
 256         return $pdu;
 257 }
 258
 259
 260 my $listenersock = IO::Socket::INET->new(
 261         Listen => 5,
 262         Proto => 'tcp',
 263         Reuse => 1,
 264         LocalAddr => $config->{listen},
 265 ) || die "can't open listen socket: $!";
 266
 267 our $server_sock;
 268
 269 sub connect_to_server {
 270         my $sock;
 271         if ( $config->{upstream_ssl} ) {
 272                 $sock = IO::Socket::SSL->new( $config->{upstream_ldap} . ':ldaps' );
 273         } else {
 274                 $sock = IO::Socket::INET->new(
 275                         Proto => 'tcp',
 276                         PeerAddr => $config->{upstream_ldap},
 277                         PeerPort => 389,
 278                 );
 279         }
 280         die "can't open ", $config->{upstream_ldap}, " $!\n" unless $sock;
 281         warn "## connected to ", $sock->peerhost, ":", $sock->peerport, "\n";
 282         return $sock;
 283 }
 284
 285 my $sel = IO::Select->new($listenersock);
 286 while (my @ready = $sel->can_read) {
 287         foreach my $fh (@ready) {
 288                 if ($fh == $listenersock) {
 289                         # let's create a new socket
 290                         my $psock = $listenersock->accept;
 291                         $sel->add($psock);
 292                         warn "## add $psock " . time;
 293                 } else {
 294                         $server_sock->{$fh} ||= connect_to_server;
 295                         if ( ! handle($fh,$server_sock->{$fh}) ) {
 296                                 warn "## remove $fh " . time;
 297                                 $sel->remove($server_sock->{$fh});
 298                                 $server_sock->{$fh}->close;
 299                                 delete $server_sock->{$fh};
 300                                 # we have finished with the socket
 301                                 $sel->remove($fh);
 302                                 $fh->close;
 303                         }
 304                 }
 305         }
 306 }
 307
 308 1;