html/cgi-bin/ids.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2015  IPFire Team  <info@ipfire.org>                     #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 use strict;
  23
  24 # enable only the following on debugging purpose
  25 #use warnings;
  26 #use CGI::Carp 'fatalsToBrowser';
  27 use File::Copy;
  28
  29 require '/var/ipfire/general-functions.pl';
  30 require "${General::swroot}/lang.pl";
  31 require "${General::swroot}/header.pl";
  32
  33 my %color = ();
  34 my %mainsettings = ();
  35 my %netsettings = ();
  36 my %snortsettings=();
  37 my %cgiparams=();
  38 my %checked=();
  39 my %selected=();
  40
  41 # Read-in main settings, for language, theme and colors.
  42 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  43 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  44
  45 # Get netsettings.
  46 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  47
  48 &Header::showhttpheaders();
  49
  50 # Default settings for snort.
  51 $snortsettings{'ENABLE_SNORT'} = 'off';
  52 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  53 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  54 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  55 $snortsettings{'ACTION'} = '';
  56 $snortsettings{'RULES'} = '';
  57 $snortsettings{'OINKCODE'} = '';
  58 $snortsettings{'INSTALLDATE'} = '';
  59
  60 #Get GUI values
  61 &Header::getcgihash(\%cgiparams);
  62
  63 my $snortrulepath = "/etc/snort/rules";
  64 my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
  65 my $restartsnortrequired = 0;
  66 my %snortrules;
  67 my $errormessage;
  68 my $url;
  69
  70 ## Grab all available snort rules and store them in the snortrules hash.
  71 #
  72 # Open snort rules directory and do a directory listing.
  73 opendir(DIR, $snortrulepath) or die $!;
  74         # Loop through the direcory.
  75         while (my $file = readdir(DIR)) {
  76
  77                 # We only want files.
  78                 next unless (-f "$snortrulepath/$file");
  79
  80                 # Ignore empty files.
  81                 next if (-z "$snortrulepath/$file");
  82
  83                 # Use a regular expression to find files ending in .rules
  84                 next unless ($file =~ m/\.rules$/);
  85
  86                 # Ignore files which are not read-able.
  87                 next unless (-R "$snortrulepath/$file");
  88
  89                 # Call subfunction to read-in rulefile and add rules to
  90                 # the snortrules hash.
  91                 &readrulesfile("$file");
  92         }
  93
  94 closedir(DIR);
  95
  96 # Gather used rulefiles.
  97 #
  98 # Check if the file for activated rulefiles is not empty.
  99 if(-f $snortusedrulefilesfile) {
 100         # Open the file for used rulefile and read-in content.
 101         open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
 102
 103         # Read-in content.
 104         my @lines = <FILE>;
 105
 106         # Close file.
 107         close(FILE);
 108
 109         # Loop through the array.
 110         foreach my $line (@lines) {
 111                 # Remove newlines.
 112                 chomp($line);
 113
 114                 # Skip comments.
 115                 next if ($line =~ /\#/);
 116
 117                 # Skip blank  lines.
 118                 next if ($line =~ /^\s*$/);
 119
 120                 # Gather rule sid and message from the ruleline.
 121                 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
 122                         my $rulefile = $1;
 123
 124                         # Add the rulefile to the %snortrules hash.
 125                         $snortrules{$rulefile}{'Rulefile'}{'State'} = "on";
 126                 }
 127         }
 128 }
 129
 130 # Save ruleset.
 131 if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
 132         my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
 133         my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
 134
 135         # Arrays to store sid which should be added to the corresponding files.
 136         my @enabled_sids;
 137         my @disabled_sids;
 138         my @enabled_rulefiles;
 139
 140         # Loop through the hash of snortrules.
 141         foreach my $rulefile(keys %snortrules) {
 142                 # Check if the rulefile is enabled.
 143                 if ($cgiparams{$rulefile} eq "on") {
 144                         # Add rulefile to the array of enabled rulefiles.
 145                         push(@enabled_rulefiles, $rulefile);
 146
 147                         # Drop item from cgiparams hash.
 148                         delete $cgiparams{$rulefile};
 149                 }
 150
 151                 # Loop through the single rules of the rulefile.
 152                 foreach my $sid (keys %{$snortrules{$rulefile}}) {
 153                         # Check if there exists a key in the cgiparams hash for this sid.
 154                         if (exists($cgiparams{$sid})) {
 155                                 # Look if the rule is disabled.
 156                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
 157                                         # Check if the state has been set to 'on'.
 158                                         if ($cgiparams{$sid} eq "on") {
 159                                                 # Add the sid to the enabled_sids array.
 160                                                 push(@enabled_sids, $sid);
 161
 162                                                 # Drop item from cgiparams hash.
 163                                                 delete $cgiparams{$rulefile}{$sid};
 164                                         }
 165                                 }
 166                         } else {
 167                                 # Look if the rule is enabled.
 168                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
 169                                         # Check if the state is 'on' and should be disabled.
 170                                         # In this case there is no entry
 171                                         # for the sid in the cgiparams hash.
 172                                         # Add it to the disabled_sids array.
 173                                         push(@disabled_sids, $sid);
 174
 175                                         # Drop item from cgiparams hash.
 176                                         delete $cgiparams{$rulefile}{$sid};
 177                                 }
 178                         }
 179                 }
 180         }
 181
 182         # Check if the enabled_sids array contains any sid's.
 183         if (@enabled_sids) {
 184                 # Open enabled sid's file for writing.
 185                 open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
 186
 187                 # Write header to file.
 188                 print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 189
 190                 # Loop through the array of enabled sids and write them to the file.
 191                 foreach my $sid (@enabled_sids) {
 192                         print FILE "enable_sid $sid\n";
 193                 }
 194
 195                 # Close file after writing.
 196                 close(FILE);
 197         }
 198
 199         # Check if the enabled_sids array contains any sid's.
 200         if (@disabled_sids) {
 201                 # Open disabled sid's file for writing.
 202                 open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
 203
 204                 # Write header to file.
 205                 print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 206
 207                 # Loop through the array of disabled sids and write them to the file.
 208                 foreach my $sid (@disabled_sids) {
 209                         print FILE "disable_sid $sid\n";
 210                 }
 211
 212                 # Close file after writing.
 213                 close(FILE);
 214         }
 215
 216         # Open file for used rulefiles.
 217         open (FILE, ">$snortusedrulefilesfile") or die "Could not wirte to $snortusedrulefilesfile. $!\n";
 218
 219         # Write header to file.
 220         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 221
 222         # Check if the enabled_rulefiles array contains any entries.
 223         if (@enabled_rulefiles) {
 224                 # Loop through the array of rulefiles which should be loaded and write the to the file.
 225                 foreach my $file (@enabled_rulefiles) {
 226                         print FILE "include \$RULE_PATH/$file\n";
 227                 }
 228         }
 229
 230         # Close file after writing.
 231         close(FILE);
 232 }
 233
 234 if ($snortsettings{'OINKCODE'} ne "") {
 235         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 236 }
 237
 238 if (!$errormessage) {
 239         if ($snortsettings{'RULES'} eq 'subscripted') {
 240                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 241         } elsif ($snortsettings{'RULES'} eq 'registered') {
 242                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 243         } elsif ($snortsettings{'RULES'} eq 'community') {
 244                 $url=" https://www.snort.org/rules/community";
 245         } else {
 246                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 247         }
 248
 249         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 250                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 251                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 252                 {
 253                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 254                 } else {
 255                         unlink "${General::swroot}/snort/enable";
 256                 }
 257                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 258                 {
 259                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 260                 } else {
 261                         unlink "${General::swroot}/snort/enable_green";
 262                 }
 263                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 264                 {
 265                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 266                 } else {
 267                         unlink "${General::swroot}/snort/enable_blue";
 268                 }
 269                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 270                 {
 271                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 272                 } else {
 273                         unlink "${General::swroot}/snort/enable_orange";
 274                 }
 275                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 276                 {
 277                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 278                 } else {
 279                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 280                 }
 281
 282                 system('/usr/local/bin/snortctrl restart >/dev/null');
 283         }
 284
 285         # INSTALLMD5 is not in the form, so not retrieved by getcgihash
 286         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 287
 288         if ($snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 289                 my @df = `/bin/df -B M /var`;
 290                 foreach my $line (@df) {
 291                         next if $line =~ m/^Filesystem/;
 292                         my $return;
 293
 294                         if ($line =~ m/dev/ ) {
 295                                 $line =~ m/^.* (\d+)M.*$/;
 296                                 my @temp = split(/ +/,$line);
 297                                 if ($1<300) {
 298                                         $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 299                                 } else {
 300                                         if ( $snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 301                                                 &downloadrulesfile();
 302                                                 sleep(3);
 303                                                 $return = `cat /var/tmp/log 2>/dev/null`;
 304
 305                                         }
 306
 307                                         if ($return =~ "ERROR") {
 308                                                 $errormessage = "<br /><pre>".$return."</pre>";
 309                                         } else {
 310                                                 system("/usr/local/bin/oinkmaster.pl -v -s -u file:///var/tmp/snortrules.tar.gz -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules >>/var/tmp/log 2>&1 &");
 311                                                 sleep(2);
 312                                         }
 313                                 }
 314                         }
 315                 }
 316         }
 317 }
 318
 319 $checked{'ENABLE_SNORT'}{'off'} = '';
 320 $checked{'ENABLE_SNORT'}{'on'} = '';
 321 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 322 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 323 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 324 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 325 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 326 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 327 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 328 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 329 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 330 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 331 $selected{'RULES'}{'nothing'} = '';
 332 $selected{'RULES'}{'community'} = '';
 333 $selected{'RULES'}{'emerging'} = '';
 334 $selected{'RULES'}{'registered'} = '';
 335 $selected{'RULES'}{'subscripted'} = '';
 336 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 337
 338 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 339
 340 ### Java Script ###
 341 print <<END
 342 <script>
 343         // Tiny java script function to show/hide the rules
 344         // of a given category.
 345         function showhide(tblname) {
 346                 \$("#" + tblname).toggle();
 347         }
 348 </script>
 349 END
 350 ;
 351
 352 &Header::openbigbox('100%', 'left', '', $errormessage);
 353
 354 ###############
 355 # DEBUG DEBUG
 356 # &Header::openbox('100%', 'left', 'DEBUG');
 357 # my $debugCount = 0;
 358 # foreach my $line (sort keys %snortsettings) {
 359 # print "$line = $snortsettings{$line}<br />\n";
 360 # $debugCount++;
 361 # }
 362 # print "&nbsp;Count: $debugCount\n";
 363 # &Header::closebox();
 364 # DEBUG DEBUG
 365 ###############
 366
 367 if ($errormessage) {
 368         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 369         print "<class name='base'>$errormessage\n";
 370         print "&nbsp;</class>\n";
 371         &Header::closebox();
 372 }
 373
 374 my $return = `pidof oinkmaster.pl -x`;
 375 chomp($return);
 376 if ($return) {
 377         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 378         print <<END;
 379         <table>
 380                 <tr><td>
 381                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 382                         <td>
 383                                 $Lang::tr{'snort working'}
 384                 <tr><td colspan='2' align='center'>
 385                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 386                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 387                         </form>
 388                 <tr><td colspan='2' align='left'><pre>
 389 END
 390         my @output = `tail -20 /var/tmp/log`;
 391         foreach (@output) {
 392                 print "$_";
 393         }
 394         print <<END;
 395                         </pre>
 396                 </table>
 397 END
 398         &Header::closebox();
 399         &Header::closebigbox();
 400         &Header::closepage();
 401         exit;
 402         refreshpage();
 403 }
 404
 405 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 406 print <<END
 407 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 408 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 409 END
 410 ;
 411 if ($netsettings{'BLUE_DEV'} ne '') {
 412   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 413 }
 414 if ($netsettings{'ORANGE_DEV'} ne '') {
 415   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 416 }
 417   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 418
 419 print <<END
 420 </td></tr>
 421 <tr>
 422         <td><br><br></td>
 423 </tr>
 424 <tr>
 425         <td><b>$Lang::tr{'ids rules update'}</b></td>
 426 </tr>
 427 <tr>
 428         <td><select name='RULES'>
 429                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 430                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 431                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 432                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 433                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 434                         </select>
 435         </td>
 436 </tr>
 437 <tr>
 438         <td><br />
 439                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 440                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 441         </td>
 442 </tr>
 443 <tr>
 444         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 445 </tr>
 446 <tr>
 447         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 448 END
 449 ;
 450 if ( -e "/var/tmp/snortrules.tar.gz"){
 451         my @Info = stat("/var/tmp/snortrules.tar.gz");
 452         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 453 }
 454 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 455
 456 print <<END
 457 </tr>
 458 </table>
 459 <br><br>
 460 <table width='100%'>
 461 <tr>
 462         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 463 </tr>
 464 </table>
 465 </form>
 466 END
 467 ;
 468
 469 &Header::closebox();
 470
 471 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 472         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 473
 474         # Output display table for rule files
 475         print "<table width='100%'>\n";
 476
 477         # Local variable required for java script to show/hide
 478         # rules of a rulefile.
 479         my $rulesetcount = 1;
 480
 481         # Loop over each rule file
 482         foreach my $rulefile (sort keys(%snortrules)) {
 483                 my $rulechecked = '';
 484
 485                 # Check if rule file is enabled
 486                 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 487                         $rulechecked = 'CHECKED';
 488                 }
 489
 490                 # Table and rows for the rule files.
 491                 print"<tr>\n";
 492                 print"<td class='base' width='5%'>\n";
 493                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 494                 print"</td>\n";
 495                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 496                 print"<td class='base' width='5%' align='right'>\n";
 497                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 498                 print"</td>\n";
 499                 print"</tr>\n";
 500
 501                 # Rows which will be hidden per default and will contain the single rules.
 502                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 503                 print"<td colspan='3'>\n";
 504
 505                 # Local vars
 506                 my $lines;
 507                 my $rows;
 508                 my $col;
 509
 510                 # New table for the single rules.
 511                 print "<table width='100%'>\n";
 512
 513                 # Loop over rule file rules
 514                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 515                         # Local vars
 516                         my $ruledefchecked = '';
 517
 518                         # Skip rulefile itself.
 519                         next if ($sid eq "Rulefile");
 520
 521                         # If 2 rules have been displayed, start a new row
 522                         if (($lines % 2) == 0) {
 523                                 print "</tr><tr>\n";
 524
 525                                 # Increase rows by once.
 526                                 $rows++;
 527                         }
 528
 529                         # Colour lines.
 530                         if ($rows % 2) {
 531                                 $col="bgcolor='$color{'color20'}'";
 532                         } else {
 533                                 $col="bgcolor='$color{'color22'}'";
 534                         }
 535
 536                         # Set rule state
 537                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
 538                                 $ruledefchecked = 'CHECKED';
 539                         }
 540
 541                         # Create rule checkbox and display rule description
 542                         print "<td class='base' width='5%' align='right' $col>\n";
 543                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 544                         print "</td>\n";
 545                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 546
 547                         # Increment rule count
 548                         $lines++;
 549                 }
 550
 551                 # If do not have a second rule for row, create empty cell
 552                 if (($lines % 2) != 0) {
 553                         print "<td class='base'></td>";
 554                 }
 555
 556                 # Close display table
 557                 print "</tr></table></td></tr>";
 558
 559                 # Finished whith the rule file, increase count.
 560                 $rulesetcount++;
 561         }
 562
 563         # Close display table
 564         print "</table>";
 565
 566 print <<END
 567 <table width='100%'>
 568 <tr>
 569         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 570                 &nbsp; <!-- space for future online help link -->
 571         </td>
 572 </tr>
 573 </table>
 574 </form>
 575 END
 576 ;
 577 &Header::closebox();
 578
 579 &Header::closebigbox();
 580 &Header::closepage();
 581
 582 sub refreshpage {
 583         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 584                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 585         &Header::closebox();
 586 }
 587
 588 sub downloadrulesfile {
 589         my $peer;
 590         my $peerport;
 591
 592         unlink("/var/tmp/log");
 593
 594         unless (-e "${General::swroot}/red/active") {
 595                 $errormessage = $Lang::tr{'could not download latest updates'};
 596                 return undef;
 597         }
 598
 599         my %proxysettings=();
 600         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 601
 602         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 603                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 604         }
 605
 606         if ($peer) {
 607                 system("wget -r --proxy=on --proxy-user=$proxysettings{'UPSTREAM_USER'} --proxy-passwd=$proxysettings{'UPSTREAM_PASSWORD'} -e http_proxy=http://$peer:$peerport/ -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 608         } else {
 609                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 610         }
 611 }
 612
 613 sub readrulesfile ($) {
 614         my $rulefile = shift;
 615
 616         # Open rule file and read in contents
 617         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 618
 619         # Store file content in an array.
 620         my @lines = <RULEFILE>;
 621
 622         # Close file.
 623         close(RULEFILE);
 624
 625         # Loop over rule file contents
 626         foreach my $line (@lines) {
 627                 # Remove whitespaces.
 628                 chomp $line;
 629
 630                 # Skip blank  lines.
 631                 next if ($line =~ /^\s*$/);
 632
 633                 # Local vars.
 634                 my $sid;
 635                 my $msg;
 636
 637                 # Gather rule sid and message from the ruleline.
 638                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 639                         $msg = $1;
 640                         $sid = $2;
 641
 642                         # Check if a rule has been found.
 643                         if ($sid && $msg) {
 644                                 # Add rule to the snortrules hash.
 645                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 646
 647                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 648                                 if ($line =~ /^\#/) {
 649                                         # If yes, the rule is disabled.
 650                                         $snortrules{$rulefile}{$sid}{'State'} = "off";
 651                                 } else {
 652                                         # Otherwise the rule is enabled.
 653                                         $snortrules{$rulefile}{$sid}{'State'} = "on";
 654                                 }
 655                         }
 656                 }
 657         }
 658 }