a56d548916d151d359450da6e10174d3a69baf66
1 #!/usr/bin/perl
2 #===============================================================================
3 #
4 # FILE: gosa-server
5 #
6 # USAGE: gosa-si-client
7 #
8 # DESCRIPTION:
9 #
10 # OPTIONS: ---
11 # REQUIREMENTS: libnetaddr-ip-perl
12 # BUGS: ---
13 # NOTES:
14 # AUTHOR: (Andreas Rettenberger), <rettenberger@gonicus.de>
15 # COMPANY:
16 # VERSION: 1.0
17 # CREATED: 12.09.2007 08:54:41 CEST
18 # REVISION: ---
19 #===============================================================================
21 use strict;
22 use warnings;
23 use Getopt::Long;
24 use Config::IniFiles;
25 use POSIX;
26 use Time::HiRes qw( gettimeofday );
28 use POE qw(Component::Server::TCP);
29 use IO::Socket::INET;
30 use NetAddr::IP;
31 use Data::Dumper;
32 use Crypt::Rijndael;
33 use GOSA::GosaSupportDaemon;
34 use Digest::MD5 qw(md5_hex md5 md5_base64);
35 use MIME::Base64;
36 use XML::Simple;
37 use Net::DNS;
39 my $event_dir = "/usr/lib/gosa-si/client/events";
40 use lib "/usr/lib/gosa-si/client/events";
42 my ($cfg_file, %cfg_defaults, $foreground, $verbose, $pid_file, $procid, $pid, $log_file, $fai_logpath);
43 my ($server_ip, $server_port, $server_key, $server_timeout, $server_domain, $server_key_lifetime);
44 my ($client_ip, $client_port, $client_mac_address, $ldap_enabled, $ldap_config, $pam_config, $nss_config);
45 my $xml;
46 my $default_server_key;
47 my $event_hash;
48 my @servers;
49 my $gotoHardwareChecksum;
51 # globalise variables which are used in imported events
52 our $cfg_file;
53 our $server_address;
54 our $client_address;
55 our $server_key;
57 # default variables
58 our $REGISTERED_FLAG = 1;
60 %cfg_defaults = (
61 "general" =>
62 {"log_file" => [\$log_file, "/var/run/".$0.".log"],
63 "pid_file" => [\$pid_file, "/var/run/".$0.".pid"],
64 "fai_logpath" => [\$fai_logpath, "/var/log/fai/fai.log"],
65 },
66 "client" =>
67 {"client_port" => [\$client_port, "20083"],
68 "client_ip" => [\$client_ip, "0.0.0.0"],
69 "client_mac_address" => [\$client_mac_address, "00:00:00:00:00:00"],
70 "ldap" => [\$ldap_enabled, 1],
71 "ldap_config" => [\$ldap_config, "/etc/ldap/ldap.conf"],
72 "pam_config" => [\$pam_config, "/etc/pam_ldap.conf"],
73 "nss_config" => [\$nss_config, "/etc/libnss_ldap.conf"],
74 },
75 "server" =>
76 {"server_ip" => [\$server_ip, "127.0.0.1"],
77 "server_port" => [\$server_port, "20081"],
78 "server_key" => [\$server_key, ""],
79 "server_timeout" => [\$server_timeout, 10],
80 "server_domain" => [\$server_domain, ""],
81 "server_key_lifetime" => [\$server_key_lifetime, 600],
82 },
84 );
87 #=== FUNCTIONS = functions =====================================================
89 #=== FUNCTION ================================================================
90 # NAME: check_cmdline_param
91 # PARAMETERS:
92 # RETURNS:
93 # DESCRIPTION:
94 #===============================================================================
95 sub check_cmdline_param () {
96 my $err_config;
97 my $err_counter = 0;
98 if(not defined($cfg_file)) {
99 $cfg_file = "/etc/gosa-si/client.conf";
100 if(! -r $cfg_file) {
101 $err_config = "please specify a config file";
102 $err_counter += 1;
103 }
104 }
105 if( $err_counter > 0 ) {
106 &usage( "", 1 );
107 if( defined( $err_config)) { print STDERR "$err_config\n"}
108 print STDERR "\n";
109 exit( -1 );
110 }
111 }
114 #=== FUNCTION ================================================================
115 # NAME: read_configfile
116 # PARAMETERS: cfg_file - string -
117 # RETURNS:
118 # DESCRIPTION:
119 #===============================================================================
120 sub read_configfile {
121 my ($cfg_file, %cfg_defaults) = @_ ;
122 my $cfg;
123 if( defined( $cfg_file) && ( length($cfg_file) > 0 )) {
124 if( -r $cfg_file ) {
125 $cfg = Config::IniFiles->new( -file => $cfg_file );
126 } else {
127 print STDERR "Couldn't read config file!";
128 }
129 } else {
130 $cfg = Config::IniFiles->new() ;
131 }
132 foreach my $section (keys %cfg_defaults) {
133 foreach my $param (keys %{$cfg_defaults{ $section }}) {
134 my $pinfo = $cfg_defaults{ $section }{ $param };
135 ${@$pinfo[ 0 ]} = $cfg->val( $section, $param, @$pinfo[ 1 ] );
136 }
137 }
138 }
141 #=== FUNCTION ================================================================
142 # NAME: check_pid
143 # PARAMETERS:
144 # RETURNS:
145 # DESCRIPTION:
146 #===============================================================================
147 sub check_pid {
148 $pid = -1;
149 # Check, if we are already running
150 if( open(LOCK_FILE, "<$pid_file") ) {
151 $pid = <LOCK_FILE>;
152 if( defined $pid ) {
153 chomp( $pid );
154 if( -f "/proc/$pid/stat" ) {
155 my($stat) = `cat /proc/$pid/stat` =~ m/$pid \((.+)\).*/;
156 if( $0 eq $stat ) {
157 close( LOCK_FILE );
158 exit -1;
159 }
160 }
161 }
162 close( LOCK_FILE );
163 unlink( $pid_file );
164 }
166 # create a syslog msg if it is not to possible to open PID file
167 if (not sysopen(LOCK_FILE, $pid_file, O_WRONLY|O_CREAT|O_EXCL, 0644)) {
168 my($msg) = "Couldn't obtain lockfile '$pid_file' ";
169 if (open(LOCK_FILE, '<', $pid_file)
170 && ($pid = <LOCK_FILE>))
171 {
172 chomp($pid);
173 $msg .= "(PID $pid)\n";
174 } else {
175 $msg .= "(unable to read PID)\n";
176 }
177 if( ! ($foreground) ) {
178 openlog( $0, "cons,pid", "daemon" );
179 syslog( "warning", $msg );
180 closelog();
181 }
182 else {
183 print( STDERR " $msg " );
184 }
185 exit( -1 );
186 }
187 }
190 #=== FUNCTION ================================================================
191 # NAME: logging
192 # PARAMETERS: level - string - default 'info'
193 # msg - string -
194 # facility - string - default 'LOG_DAEMON'
195 # RETURNS:
196 # DESCRIPTION:
197 #===============================================================================
198 sub daemon_log {
199 # log into log_file
200 my( $msg, $level ) = @_;
201 if(not defined $msg) { return }
202 if(not defined $level) { $level = 1 }
203 if(defined $log_file){
204 open(LOG_HANDLE, ">>$log_file");
205 if(not defined open( LOG_HANDLE, ">>$log_file" )) {
206 print STDERR "cannot open $log_file: $!";
207 return }
208 chomp($msg);
209 if($level <= $verbose){
210 my ($seconds, $minutes, $hours, $monthday, $month,
211 $year, $weekday, $yearday, $sommertime) = localtime(time);
212 $hours = $hours < 10 ? $hours = "0".$hours : $hours;
213 $minutes = $minutes < 10 ? $minutes = "0".$minutes : $minutes;
214 $seconds = $seconds < 10 ? $seconds = "0".$seconds : $seconds;
215 my @monthnames = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
216 $month = $monthnames[$month];
217 $monthday = $monthday < 10 ? $monthday = "0".$monthday : $monthday;
218 $year+=1900;
219 my $name = $0;
220 $name =~ s/\.\///;
222 my $log_msg = "$month $monthday $hours:$minutes:$seconds $name $msg\n";
223 print LOG_HANDLE $log_msg;
224 if( $foreground ) {
225 print STDERR $log_msg;
226 }
227 }
228 close( LOG_HANDLE );
229 }
230 #log into syslog
231 # my ($msg, $level, $facility) = @_;
232 # if(not defined $msg) {return}
233 # if(not defined $level) {$level = "info"}
234 # if(not defined $facility) {$facility = "LOG_DAEMON"}
235 # openlog($0, "pid,cons,", $facility);
236 # syslog($level, $msg);
237 # closelog;
238 # return;
239 }
242 #=== FUNCTION ================================================================
243 # NAME: get_interfaces
244 # PARAMETERS: none
245 # RETURNS: (list of interfaces)
246 # DESCRIPTION: Uses proc fs (/proc/net/dev) to get list of interfaces.
247 #===============================================================================
248 sub get_interfaces {
249 my @result;
250 my $PROC_NET_DEV= ('/proc/net/dev');
252 open(PROC_NET_DEV, "<$PROC_NET_DEV")
253 or die "Could not open $PROC_NET_DEV";
255 my @ifs = <PROC_NET_DEV>;
257 close(PROC_NET_DEV);
259 # Eat first two line
260 shift @ifs;
261 shift @ifs;
263 chomp @ifs;
264 foreach my $line(@ifs) {
265 my $if= (split /:/, $line)[0];
266 $if =~ s/^\s+//;
267 push @result, $if;
268 }
270 return @result;
271 }
273 #=== FUNCTION ================================================================
274 # NAME: get_mac
275 # PARAMETERS: interface name (i.e. eth0)
276 # RETURNS: (mac address)
277 # DESCRIPTION: Uses ioctl to get mac address directly from system.
278 #===============================================================================
279 sub get_mac {
280 my $ifreq= shift;
281 my $result;
282 if ($ifreq && length($ifreq) > 0) {
283 if($ifreq eq "all") {
284 if(defined($server_ip)) {
285 $result = &get_local_mac_for_remote_ip($server_ip);
286 }
287 elsif ($client_mac_address && length($client_mac_address) > 0 && !($client_mac_address eq "00:00:00:00:00:00")){
288 $result = &client_mac_address;
289 }
290 else {
291 $result = "00:00:00:00:00:00";
292 }
293 } else {
294 my $SIOCGIFHWADDR= 0x8927; # man 2 ioctl_list
296 # A configured MAC Address should always override a guessed value
297 if ($client_mac_address and length($client_mac_address) > 0 and not($client_mac_address eq "00:00:00:00:00:00")) {
298 $result= $client_mac_address;
299 }
300 else {
301 socket SOCKET, PF_INET, SOCK_DGRAM, getprotobyname('ip')
302 or die "socket: $!";
304 if(ioctl SOCKET, $SIOCGIFHWADDR, $ifreq) {
305 my ($if, $mac)= unpack 'h36 H12', $ifreq;
307 if (length($mac) > 0) {
308 $mac=~ m/^([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])$/;
309 $mac= sprintf("%s:%s:%s:%s:%s:%s", $1, $2, $3, $4, $5, $6);
310 $result = $mac;
311 }
312 }
313 }
314 }
315 }
316 return $result;
317 }
320 #=== FUNCTION ================================================================
321 # NAME: get_interface_for_ip
322 # PARAMETERS: ip address (i.e. 192.168.0.1)
323 # RETURNS: array: list of interfaces if ip=0.0.0.0, matching interface if found, undef else
324 # DESCRIPTION: Uses proc fs (/proc/net/dev) to get list of interfaces.
325 #===============================================================================
326 sub get_interface_for_ip {
327 my $result;
328 my $ip= shift;
329 if ($ip && length($ip) > 0) {
330 my @ifs= &get_interfaces();
331 if($ip eq "0.0.0.0") {
332 $result = "all";
333 } else {
334 foreach (@ifs) {
335 my $if=$_;
336 if(get_ip($if) eq $ip) {
337 $result = $if;
338 last;
339 }
340 }
341 }
342 }
343 return $result;
344 }
347 #=== FUNCTION ================================================================
348 # NAME: get_ip
349 # PARAMETERS: interface name (i.e. eth0)
350 # RETURNS: (ip address)
351 # DESCRIPTION: Uses ioctl to get ip address directly from system.
352 #===============================================================================
353 sub get_ip {
354 my $ifreq= shift;
355 my $result= "";
356 my $SIOCGIFADDR= 0x8915; # man 2 ioctl_list
357 my $proto= getprotobyname('ip');
359 socket SOCKET, PF_INET, SOCK_DGRAM, $proto
360 or die "socket: $!";
362 if(ioctl SOCKET, $SIOCGIFADDR, $ifreq) {
363 my ($if, $sin) = unpack 'a16 a16', $ifreq;
364 my ($port, $addr) = sockaddr_in $sin;
365 my $ip = inet_ntoa $addr;
367 if ($ip && length($ip) > 0) {
368 $result = $ip;
369 }
370 }
372 return $result;
373 }
376 #=== FUNCTION ================================================================
377 # NAME: get_local_mac_for_remote_ip
378 # PARAMETERS: none (takes server_ip from global variable)
379 # RETURNS: (ip address from interface that is used for communication)
380 # DESCRIPTION: Uses ioctl to get routing table from system, checks which entry
381 # matches (defaultroute last).
382 #===============================================================================
383 sub get_local_mac_for_remote_ip {
384 my $server_ip= shift;
385 my $result= "00:00:00:00:00:00";
387 if($server_ip =~ /^(\d\d?\d?\.){3}\d\d?\d?$/) {
388 my $PROC_NET_ROUTE= ('/proc/net/route');
390 open(PROC_NET_ROUTE, "<$PROC_NET_ROUTE")
391 or die "Could not open $PROC_NET_ROUTE";
393 my @ifs = <PROC_NET_ROUTE>;
395 close(PROC_NET_ROUTE);
397 # Eat header line
398 shift @ifs;
399 chomp @ifs;
400 foreach my $line(@ifs) {
401 my ($Iface,$Destination,$Gateway,$Flags,$RefCnt,$Use,$Metric,$Mask,$MTU,$Window,$IRTT)=split(/\s/, $line);
402 my $destination;
403 my $mask;
404 my ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Destination);
405 $destination= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
406 ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Mask);
407 $mask= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
408 if(new NetAddr::IP($server_ip)->within(new NetAddr::IP($destination, $mask))) {
409 # destination matches route, save mac and exit
410 $result= &get_mac($Iface);
411 last;
412 }
413 }
414 } else {
415 daemon_log("get_local_mac_for_remote_ip was called with a non-ip parameter: $server_ip", 1);
416 }
417 return $result;
418 }
420 sub get_local_ip_for_remote_ip {
421 my $server_ip= shift;
422 my $result="0.0.0.0";
424 if($server_ip =~ /^(\d\d?\d?\.){3}\d\d?\d?$/) {
425 if($server_ip eq "127.0.0.1") {
426 $result="127.0.0.1";
427 } else {
428 my $PROC_NET_ROUTE= ('/proc/net/route');
430 open(PROC_NET_ROUTE, "<$PROC_NET_ROUTE")
431 or die "Could not open $PROC_NET_ROUTE";
433 my @ifs = <PROC_NET_ROUTE>;
435 close(PROC_NET_ROUTE);
437 # Eat header line
438 shift @ifs;
439 chomp @ifs;
440 foreach my $line(@ifs) {
441 my ($Iface,$Destination,$Gateway,$Flags,$RefCnt,$Use,$Metric,$Mask,$MTU,$Window,$IRTT)=split(/\s/, $line);
442 my $destination;
443 my $mask;
444 my ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Destination);
445 $destination= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
446 ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Mask);
447 $mask= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
448 if(new NetAddr::IP($server_ip)->within(new NetAddr::IP($destination, $mask))) {
449 # destination matches route, save mac and exit
450 $result= &get_ip($Iface);
451 last;
452 }
453 }
454 }
455 } else {
456 daemon_log("get_local_ip_for_remote_ip was called with a non-ip parameter: $server_ip", 1);
457 }
458 return $result;
459 }
461 sub new_ldap_config {
462 my ($msg_hash) = @_ ;
463 my $element;
464 my @ldap_uris;
465 my $ldap_base;
466 my @ldap_options;
467 my @pam_options;
468 my @nss_options;
469 my $goto_admin;
470 my $goto_secret;
471 my $admin_base= "";
472 my $department= "";
473 my $unit_tag;
475 # Transform input into array
476 while ( my ($key, $value) = each(%$msg_hash) ) {
477 if ($key =~ /^(source|target|header)$/) {
478 next;
479 }
481 foreach $element (@$value) {
482 if ($key =~ /^ldap_uri$/) {
483 push (@ldap_uris, $element);
484 next;
485 }
486 if ($key =~ /^ldap_base$/) {
487 $ldap_base= $element;
488 next;
489 }
490 if ($key =~ /^goto_admin$/) {
491 $goto_admin= $element;
492 next;
493 }
494 if ($key =~ /^goto_secret$/) {
495 $goto_secret= $element;
496 next;
497 }
498 if ($key =~ /^ldap_cfg$/) {
499 push (@ldap_options, "$element");
500 next;
501 }
502 if ($key =~ /^pam_cfg$/) {
503 push (@pam_options, "$element");
504 next;
505 }
506 if ($key =~ /^nss_cfg$/) {
507 push (@nss_options, "$element");
508 next;
509 }
510 if ($key =~ /^admin_base$/) {
511 $admin_base= $element;
512 next;
513 }
514 if ($key =~ /^department$/) {
515 $department= $element;
516 next;
517 }
518 if ($key =~ /^unit_tag$/) {
519 $unit_tag= $element;
520 next;
521 }
522 }
523 }
525 # Unit tagging enabled?
526 if (defined $unit_tag){
527 push (@pam_options, "pam_filter gosaUnitTag=$unit_tag");
528 push (@nss_options, "nss_base_passwd $admin_base?sub?gosaUnitTag=$unit_tag");
529 push (@nss_options, "nss_base_group $admin_base?sub?gosaUnitTag=$unit_tag");
530 }
532 # Setup ldap.conf
533 my $file1;
534 my $file2;
535 open(file1, "> $ldap_config");
536 print file1 "# This file was automatically generated by gosa-si-client. Do not change.\n";
537 print file1 "URI";
538 foreach $element (@ldap_uris) {
539 print file1 " $element";
540 }
541 print file1 "\nBASE $ldap_base\n";
542 foreach $element (@ldap_options) {
543 print file1 "$element\n";
544 }
545 close (file1);
546 daemon_log("wrote $ldap_config", 5);
548 # Setup pam_ldap.conf / libnss_ldap.conf
549 open(file1, "> $pam_config");
550 open(file2, "> $nss_config");
551 print file1 "# This file was automatically generated by gosa-si-client. Do not change.\n";
552 print file2 "# This file was automatically generated by gosa-si-client. Do not change.\n";
553 print file1 "uri";
554 print file2 "uri";
555 foreach $element (@ldap_uris) {
556 print file1 " $element";
557 print file2 " $element";
558 }
559 print file1 "\nbase $ldap_base\n";
560 print file2 "\nbase $ldap_base\n";
561 foreach $element (@pam_options) {
562 print file1 "$element\n";
563 }
564 foreach $element (@nss_options) {
565 print file2 "$element\n";
566 }
567 close (file2);
568 daemon_log("wrote $nss_config", 5);
569 close (file1);
570 daemon_log("wrote $pam_config", 5);
572 # Create goto.secrets if told so - for compatibility reasons
573 if (defined $goto_admin){
574 open(file1, "> /etc/goto/secret");
575 close(file1);
576 chown(0,0, "/etc/goto/secret");
577 chmod(0600, "/etc/goto/secret");
578 open(file1, "> /etc/goto/secret");
579 print file1 "GOTOADMIN=\"$goto_admin\"\nGOTOSECRET=\"$goto_secret\"\n";
580 close(file1);
581 daemon_log("wrote /etc/goto/secret", 5);
582 }
586 # Write shell based config
587 my $cfg_name= dirname($ldap_config)."/ldap-shell.conf";
588 open(file1, "> $cfg_name");
589 print file1 "LDAP_BASE=\"$ldap_base\"\n";
590 print file1 "ADMIN_BASE=\"$admin_base\"\n";
591 print file1 "DEPARTMENT=\"$department\"\n";
592 print file1 "UNIT_TAG=\"".(defined $unit_tag ? "$unit_tag" : "")."\"\n";
593 print file1 "UNIT_TAG_FILTER=\"".(defined $unit_tag ? "(gosaUnitTag=$unit_tag)" : "")."\"\n";
594 close(file1);
595 daemon_log("wrote $cfg_name", 5);
597 return;
599 }
602 sub generate_hw_digest {
603 my $hw_data;
604 foreach my $line (split /\n/, `cat /proc/bus/pci/devices`) {
605 $hw_data.= sprintf "%s", $line =~ /[^\s]+\s([^\s]+)\s.*/;
606 }
607 return(md5_base64($hw_data));
608 }
611 sub create_passwd {
612 my $new_passwd = "";
613 for(my $i=0; $i<31; $i++) {
614 $new_passwd .= ("a".."z","A".."Z",0..9)[int(rand(62))]
615 }
617 return $new_passwd;
618 }
621 sub get_server_addresses {
622 my $domain= shift;
623 my @result;
625 my $error = 0;
626 my $res = Net::DNS::Resolver->new;
627 my $query = $res->send("_gosad._tcp.".$domain, "SRV");
628 my @hits;
630 if ($query) {
631 foreach my $rr ($query->answer) {
632 push(@hits, $rr->target.":".$rr->port);
633 }
634 }
635 else {
636 #warn "query failed: ", $res->errorstring, "\n";
637 $error++;
638 }
640 if( $error == 0 ) {
641 foreach my $hit (@hits) {
642 my ($hit_name, $hit_port) = split(/:/, $hit);
644 my $address_query = $res->send($hit_name);
645 if( 1 == length($address_query->answer) ) {
646 foreach my $rr ($address_query->answer) {
647 push(@result, $rr->address.":".$hit_port);
648 }
649 }
650 }
651 }
653 # my $dig_cmd= 'dig +nocomments srv _gosad._tcp.'.$domain;
654 #
655 # my $output= `$dig_cmd 2>&1`;
656 # open (PIPE, "$dig_cmd 2>&1 |");
657 # while(<PIPE>) {
658 # chomp $_;
659 # # If it's not a comment
660 # if($_ =~ m/^[^;]/) {
661 # my @matches= split /\s+/;
662 #
663 # # Push hostname with port
664 # if($matches[3] eq 'SRV') {
665 # push @result, $matches[7].':'.$matches[6];
666 # } elsif ($matches[3] eq 'A') {
667 # my $i=0;
668 #
669 # # Substitute the hostname with the ip address of the matching A record
670 # foreach my $host (@result) {
671 # if ((split /\:/, $host)[0] eq $matches[0]) {
672 # $result[$i]= $matches[4].':'.(split /\:/, $host)[1];
673 # }
674 # $i++;
675 # }
676 # }
677 # }
678 # }
679 # close(PIPE);
680 return @result;
681 }
684 ##=== FUNCTION ================================================================
685 ## NAME: create_ciphering
686 ## PARAMETERS: passwd - string - used to create ciphering
687 ## RETURNS: cipher - object
688 ## DESCRIPTION: creates a Crypt::Rijndael::MODE_CBC object with passwd as key
689 ##===============================================================================
690 #sub create_ciphering {
691 # my ($passwd) = @_;
692 # $passwd = substr(md5_hex("$passwd") x 32, 0, 32);
693 # my $iv = substr(md5_hex('GONICUS GmbH'),0, 16);
694 #
695 # #daemon_log("iv: $iv", 7);
696 # #daemon_log("key: $passwd", 7);
697 # my $my_cipher = Crypt::Rijndael->new($passwd , Crypt::Rijndael::MODE_CBC());
698 # $my_cipher->set_iv($iv);
699 # return $my_cipher;
700 #}
701 #
702 #
703 #sub create_ciphering {
704 # my ($passwd) = @_;
705 # $passwd = substr(md5_hex("$passwd") x 32, 0, 32);
706 # my $iv = substr(md5_hex('GONICUS GmbH'),0, 16);
707 # my $my_cipher = Crypt::Rijndael->new($passwd , Crypt::Rijndael::MODE_CBC());
708 # $my_cipher->set_iv($iv);
709 # return $my_cipher;
710 #}
711 #
712 #
713 #sub encrypt_msg {
714 # my ($msg, $key) = @_;
715 # my $my_cipher = &create_ciphering($key);
716 # {
717 # use bytes;
718 # $msg = "\0"x(16-length($msg)%16).$msg;
719 # }
720 # $msg = $my_cipher->encrypt($msg);
721 # chomp($msg = &encode_base64($msg));
722 # # there are no newlines allowed inside msg
723 # $msg=~ s/\n//g;
724 # return $msg;
725 #}
726 #
727 #
728 #sub decrypt_msg {
729 # my ($msg, $key) = @_ ;
730 # $msg = &decode_base64($msg);
731 # my $my_cipher = &create_ciphering($key);
732 # $msg = $my_cipher->decrypt($msg);
733 # $msg =~ s/\0*//g;
734 # return $msg;
735 #}
738 #=== FUNCTION ================================================================
739 # NAME: send_msg_hash2address
740 # PARAMETERS: msg_hash - hash - xml_hash created with function create_xml_hash
741 # PeerAddr string - socket address to send msg
742 # PeerPort string - socket port, if not included in socket address
743 # RETURNS: nothing
744 # DESCRIPTION: ????
745 #===============================================================================
746 sub send_msg_hash2address {
747 my ($msg_hash, $address, $passwd) = @_ ;
749 # fetch header for logging
750 my $header = @{$msg_hash->{header}}[0];
752 # generate xml string
753 my $msg_xml = &create_xml_string($msg_hash);
755 # encrypt xml msg
756 my $crypted_msg = &encrypt_msg($msg_xml, $passwd);
758 # opensocket
759 my $socket = &open_socket($address);
760 if(not defined $socket){
761 daemon_log("cannot send '$header'-msg to $address , server not reachable", 5);
762 return 1;
763 }
765 # send xml msg
766 print $socket $crypted_msg."\n";
768 close $socket;
770 daemon_log("send '$header'-msg to $address", 1);
771 daemon_log("message:\n$msg_xml", 8);
772 return 0;
773 }
776 sub send_msg_to_target {
777 my ($msg, $address, $encrypt_key, $msg_header) = @_ ;
778 my $error = 0;
780 if( $msg_header ) {
781 $msg_header = "'$msg_header'-";
782 }
783 else {
784 $msg_header = "";
785 }
787 # encrypt xml msg
788 my $crypted_msg = &encrypt_msg($msg, $encrypt_key);
790 # opensocket
791 my $socket = &open_socket($address);
792 if( !$socket ) {
793 daemon_log("cannot send ".$msg_header."msg to $address , host not reachable", 1);
794 $error++;
795 }
797 if( $error == 0 ) {
798 # send xml msg
799 print $socket $crypted_msg."\n";
801 daemon_log("send ".$msg_header."msg to $address", 1);
802 daemon_log("message:\n$msg", 8);
804 }
806 # close socket in any case
807 if( $socket ) {
808 close $socket;
809 }
811 return;
812 }
815 sub open_socket {
816 my ($PeerAddr, $PeerPort) = @_ ;
817 if(defined($PeerPort)){
818 $PeerAddr = $PeerAddr.":".$PeerPort;
819 }
820 my $socket;
821 $socket = new IO::Socket::INET(PeerAddr => $PeerAddr,
822 Porto => "tcp",
823 Type => SOCK_STREAM,
824 Timeout => 5,
825 );
826 if(not defined $socket) {
827 return;
828 }
829 &daemon_log("open_socket: $PeerAddr", 7);
830 return $socket;
831 }
834 #=== FUNCTION ================================================================
835 # NAME: register_at_server
836 # PARAMETERS:
837 # RETURNS:
838 # DESCRIPTION:
839 #===============================================================================
840 sub register_at_gosa_si_server {
841 my ($kernel) = $_[KERNEL];
843 if( $REGISTERED_FLAG == 1 ) {
846 # create new passwd and ciphering object for client-server communication
847 $server_key = &create_passwd();
849 my $events = join( ", ", keys %{$event_hash} );
851 while(1) {
853 # fetch first gosa-si-server from @servers
854 my $server = shift(@servers);
856 # Check if our ip is resolvable - if not: don't try to register
857 my $ip= &get_local_ip_for_remote_ip(sprintf("%s", $server =~ /^([0-9\.]*?):.*$/));
858 my $resolver= Net::DNS::Resolver->new;
859 my $dnsresult= $resolver->search($ip);
860 if(!defined($dnsresult)) {
861 &write_to_file("goto-dns-error:Could not resolve hostname for ip $ip", $fai_logpath);
862 exit(1);
863 }
865 if( !$server ) {
866 daemon_log("no gosa-si-server left in list of servers", 1);
867 daemon_log("unable to register at a gosa-si-server, force shutdown", 1);
868 exit(1);
869 }
871 # create registration msg
872 my $register_hash = &create_xml_hash("here_i_am", &get_local_ip_for_remote_ip(sprintf("%s", $server =~ /^([0-9\.]*?):.*$/)).":".$client_port, $server);
873 &add_content2xml_hash($register_hash, "new_passwd", $server_key);
874 &add_content2xml_hash($register_hash, "mac_address", &get_local_mac_for_remote_ip(sprintf("%s", $server =~ /^([0-9\.]*?):.*$/)));
875 &add_content2xml_hash($register_hash, "events", $events);
876 &add_content2xml_hash($register_hash, "gotoHardwareChecksum", $gotoHardwareChecksum);
878 # send xml hash to server with general server passwd
879 my $res = &send_msg_hash2address($register_hash, $server, $default_server_key);
880 if($res == 0) {
881 # Set fixed client address
882 $client_ip= &get_local_ip_for_remote_ip(sprintf("%s", $server =~ /^([0-9\.]*?):.*$/));
883 $client_address= "$client_ip:$client_port";
884 last;
885 } else {
886 next;
887 }
888 }
889 daemon_log("waiting for msg 'register_at_gosa_si_server'",1);
890 $kernel->delay_set('register_at_gosa_si_server',180);
891 # clear old settings and set it again
892 $kernel->delay_set('trigger_new_key', $server_key_lifetime);
893 }
894 return;
895 }
898 sub check_key_and_xml_validity {
899 my ($crypted_msg, $module_key) = @_;
900 #print STDERR "crypted_msg:$crypted_msg\n";
901 #print STDERR "modul_key:$module_key\n";
903 my $msg;
904 my $msg_hash;
905 eval{
906 $msg = &decrypt_msg($crypted_msg, $module_key);
907 &main::daemon_log("decrypted_msg: \n$msg", 8);
909 $msg_hash = $xml->XMLin($msg, ForceArray=>1);
911 # check header
912 my $header_l = $msg_hash->{'header'};
913 if( 1 != @{$header_l} ) {
914 die 'no or more headers specified';
915 }
916 my $header = @{$header_l}[0];
917 if( 0 == length $header) {
918 die 'header has length 0';
919 }
921 # check source
922 my $source_l = $msg_hash->{'source'};
923 if( 1 != @{$source_l} ) {
924 die 'no or more sources specified';
925 }
926 my $source = @{$source_l}[0];
927 if( 0 == length $source) {
928 die 'source has length 0';
929 }
931 # check target
932 my $target_l = $msg_hash->{'target'};
933 if( 1 != @{$target_l} ) {
934 die 'no or more targets specified ';
935 }
936 my $target = @{$target_l}[0];
937 if( 0 == length $target) {
938 die 'target has length 0 ';
939 }
941 };
942 if($@) {
943 &main::daemon_log("WARNING: do not understand the message or msg is not gosa-si envelope conform:", 5);
944 &main::daemon_log("$@", 8);
945 }
947 return ($msg, $msg_hash);
948 }
951 sub import_events {
953 if (not -e $event_dir) {
954 daemon_log("ERROR: cannot find directory or directory is not readable: $event_dir", 1);
955 }
956 opendir (DIR, $event_dir) or die "ERROR while loading gosa-si-events from directory $event_dir : $!\n";
958 while (defined (my $event = readdir (DIR))) {
959 if( $event eq "." || $event eq ".." ) { next; }
961 eval{ require $event; };
962 if( $@ ) {
963 daemon_log("ERROR: import of event module '$event' failed", 1);
964 daemon_log("$@", 8);
965 next;
966 }
968 $event =~ /(\S*?).pm$/;
969 my $event_module = $1;
970 my $events_l = eval( $1."::get_events()") ;
971 foreach my $event_name (@{$events_l}) {
972 $event_hash->{$event_name} = $event_module;
973 }
975 }
976 }
978 sub trigger_new_key {
979 my ($kernel) = $_[KERNEL] ;
981 my $msg = "<xml><header>new_key</header><source>$client_address</source><target>$client_address</target></xml>";
982 &send_msg_to_target($msg, $client_address, $server_key, 'new_key');
984 $kernel->delay_set('trigger_new_key', $server_key_lifetime);
986 }
989 sub _start {
990 my ($kernel) = $_[KERNEL];
991 $kernel->alias_set('client_session');
992 $kernel->yield('register_at_gosa_si_server');
993 }
996 sub server_input {
997 my ($kernel, $heap, $input, $wheel) = @_[KERNEL, HEAP, ARG0, ARG1];
998 my $error = 0;
999 my $answer;
1001 daemon_log("Incoming msg:\n$input\n", 8);
1003 my ($msg, $msg_hash) = &check_key_and_xml_validity($input, $server_key);
1004 if( (!$msg) || (!$msg_hash) ) {
1005 daemon_log("Deciphering of incoming msg failed", 5);
1006 $error++;
1007 }
1009 ######################
1010 # process incoming msg
1011 if( $error == 0 ) {
1012 my $header = @{$msg_hash->{header}}[0];
1013 my $source = @{$msg_hash->{source}}[0];
1015 if( exists $event_hash->{$header} ) {
1016 # a event exists with the header as name
1017 daemon_log("found event '$header' at event-module '".$event_hash->{$header}."'", 5);
1018 no strict 'refs';
1019 $answer = &{$event_hash->{$header}."::$header"}($msg, $msg_hash);
1020 }
1021 else {
1022 daemon_log("WARNING: no event '$header' found in event modules under $event_dir", 1);
1023 }
1024 }
1026 ########
1027 # answer
1028 if( $answer ) {
1029 # preprocessing
1030 if( $answer =~ "<header>registered</header>") {
1031 # set registered flag to true to stop sending further registered msgs
1032 $REGISTERED_FLAG = 0;
1033 }
1034 else {
1035 &send_msg_to_target($answer, $server_address, $server_key);
1036 }
1037 # postprocessing
1038 if( $answer =~ "<header>new_key</header>") {
1039 # set new key to global variable
1040 $answer =~ /<new_key>(\S*?)<\/new_key>/;
1041 my $new_key = $1;
1042 $server_key = $new_key;
1043 }
1044 }
1046 return;
1047 }
1049 #==== MAIN = main ==============================================================
1050 # parse commandline options
1051 Getopt::Long::Configure( "bundling" );
1052 GetOptions("h|help" => \&usage,
1053 "c|config=s" => \$cfg_file,
1054 "f|foreground" => \$foreground,
1055 "v|verbose+" => \$verbose,
1056 );
1058 # read and set config parameters
1059 &check_cmdline_param ;
1060 &read_configfile($cfg_file, %cfg_defaults);
1061 &check_pid;
1064 # forward error messages to logfile
1065 if ( ! $foreground ) {
1066 open STDIN, '/dev/null' or die "Can’t read /dev/null: $!";
1067 open STDOUT, '>>/dev/null' or die "Can't write to /dev/null: $!";
1068 open STDERR, '>>/dev/null' or die "Can't write to /dev/null: $!";
1069 }
1071 # Just fork, if we are not in foreground mode
1072 if( ! $foreground ) {
1073 chdir '/' or die "Can't chdir to /: $!";
1074 $pid = fork;
1075 setsid or die "Can't start a new session: $!";
1076 umask 0;
1077 }
1078 else {
1079 $pid = $$;
1080 }
1082 # Do something useful - put our PID into the pid_file
1083 if( 0 != $pid ) {
1084 open( LOCK_FILE, ">$pid_file" );
1085 print LOCK_FILE "$pid\n";
1086 close( LOCK_FILE );
1087 if( !$foreground ) {
1088 exit( 0 )
1089 };
1090 }
1092 daemon_log(" ", 1);
1093 daemon_log("$0 started!", 1);
1095 # delete old DBsqlite lock files
1096 system('rm -f /tmp/gosa_si_lock*gosa-si-client*');
1098 # detect ip and mac address and complete host address
1099 $client_address = $client_ip.":".$client_port;
1100 my $network_interface= &get_interface_for_ip($client_ip);
1101 $client_mac_address= &get_mac($network_interface);
1102 daemon_log("gosa-si-client ip address detected: $client_ip", 1);
1103 daemon_log("gosa-si-client mac address detected: $client_mac_address", 1);
1106 # import events
1107 &import_events();
1110 # compute hardware checksum
1111 $gotoHardwareChecksum= &generate_hw_digest();
1112 daemon_log("gosa-si-client gotoHardwareChecksum detected: $gotoHardwareChecksum", 1);
1115 # create socket for incoming xml messages
1116 POE::Component::Server::TCP->new(
1117 Alias => 'gosa-si-client',
1118 Port => $client_port,
1119 ClientInput => \&server_input,
1120 );
1121 daemon_log("start socket for incoming xml messages at port '$client_port' ", 1);
1124 # prepare variables
1125 if (defined $server_ip && defined $server_port) {
1126 $server_address = $server_ip.":".$server_port;
1127 }
1128 $xml = new XML::Simple();
1129 $default_server_key = $server_key;
1132 # add gosa-si-server address from config file at first position of server list
1133 if (defined $server_address) {
1134 unshift(@servers, $server_address);
1135 my $servers_string = join(", ", @servers);
1136 daemon_log("found servers in configuration file: $servers_string", 5);
1137 }
1138 else {
1139 if ( !$server_domain) {
1140 daemon_log("ERROR: please specify a gosa-si-server address or a domain in config file", 1);
1141 exit( 1 );
1142 }
1143 my @tmp_servers = &get_server_addresses($server_domain);
1144 foreach my $server (@tmp_servers) {
1145 unshift(@servers, $server);
1146 }
1147 my $servers_string = join(", ", @servers);
1148 daemon_log("found servers in DNS: $servers_string", 5);
1149 }
1154 POE::Session->create(
1155 inline_states => {
1156 _start => \&_start,
1157 register_at_gosa_si_server => \®ister_at_gosa_si_server,
1158 trigger_new_key => \&trigger_new_key,
1159 }
1160 );
1162 POE::Kernel->run();
1163 exit;