html/cgi-bin/ids.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2018  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
  28 require '/var/ipfire/general-functions.pl';
  29 require "${General::swroot}/lang.pl";
  30 require "${General::swroot}/header.pl";
  31 require "${General::swroot}/ids-functions.pl";
  32
  33 my %color = ();
  34 my %mainsettings = ();
  35 my %netsettings = ();
  36 my %idsrules = ();
  37 my %snortsettings=();
  38 my %rulesetsources = ();
  39 my %cgiparams=();
  40 my %checked=();
  41 my %selected=();
  42
  43 # Read-in main settings, for language, theme and colors.
  44 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  45 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  46
  47 # Get netsettings.
  48 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  49
  50 my $snortrulepath = "/etc/snort/rules";
  51 my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
  52 my $errormessage;
  53
  54 &Header::showhttpheaders();
  55
  56 # Default settings for snort.
  57 $snortsettings{'ENABLE_SNORT'} = 'off';
  58 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  59 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  60 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  61 $snortsettings{'RULES'} = '';
  62 $snortsettings{'OINKCODE'} = '';
  63
  64 #Get GUI values
  65 &Header::getcgihash(\%cgiparams);
  66
  67 # Check if any error has been stored.
  68 if (-e $IDS::storederrorfile) {
  69         # Open file to read in the stored error message.
  70         open(FILE, "<$IDS::storederrorfile") or die "Could not open $IDS::storederrorfile. $!\n";
  71
  72         # Read the stored error message.
  73         $errormessage = <FILE>;
  74
  75         # Close file.
  76         close (FILE);
  77
  78         # Delete the file, which is now not longer required.
  79         unlink($IDS::storederrorfile);
  80 }
  81
  82
  83 ## Grab all available snort rules and store them in the idsrules hash.
  84 #
  85 # Open snort rules directory and do a directory listing.
  86 opendir(DIR, $snortrulepath) or die $!;
  87         # Loop through the direcory.
  88         while (my $file = readdir(DIR)) {
  89
  90                 # We only want files.
  91                 next unless (-f "$snortrulepath/$file");
  92
  93                 # Ignore empty files.
  94                 next if (-z "$snortrulepath/$file");
  95
  96                 # Use a regular expression to find files ending in .rules
  97                 next unless ($file =~ m/\.rules$/);
  98
  99                 # Ignore files which are not read-able.
 100                 next unless (-R "$snortrulepath/$file");
 101
 102                 # Call subfunction to read-in rulefile and add rules to
 103                 # the idsrules hash.
 104                 &readrulesfile("$file");
 105         }
 106
 107 closedir(DIR);
 108
 109 # Gather used rulefiles.
 110 #
 111 # Check if the file for activated rulefiles is not empty.
 112 if(-f $snortusedrulefilesfile) {
 113         # Open the file for used rulefile and read-in content.
 114         open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
 115
 116         # Read-in content.
 117         my @lines = <FILE>;
 118
 119         # Close file.
 120         close(FILE);
 121
 122         # Loop through the array.
 123         foreach my $line (@lines) {
 124                 # Remove newlines.
 125                 chomp($line);
 126
 127                 # Skip comments.
 128                 next if ($line =~ /\#/);
 129
 130                 # Skip blank  lines.
 131                 next if ($line =~ /^\s*$/);
 132
 133                 # Gather rule sid and message from the ruleline.
 134                 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
 135                         my $rulefile = $1;
 136
 137                         # Add the rulefile to the %idsrules hash.
 138                         $idsrules{$rulefile}{'Rulefile'}{'State'} = "on";
 139                 }
 140         }
 141 }
 142
 143 # Save ruleset.
 144 if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
 145         my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
 146         my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
 147
 148         # Arrays to store sid which should be added to the corresponding files.
 149         my @enabled_sids;
 150         my @disabled_sids;
 151         my @enabled_rulefiles;
 152
 153         # Loop through the hash of idsrules.
 154         foreach my $rulefile(keys %idsrules) {
 155                 # Check if the rulefile is enabled.
 156                 if ($cgiparams{$rulefile} eq "on") {
 157                         # Add rulefile to the array of enabled rulefiles.
 158                         push(@enabled_rulefiles, $rulefile);
 159
 160                         # Drop item from cgiparams hash.
 161                         delete $cgiparams{$rulefile};
 162                 }
 163         }
 164
 165         # Loop through the hash of idsrules.
 166         foreach my $rulefile (keys %idsrules) {
 167                 # Loop through the single rules of the rulefile.
 168                 foreach my $sid (keys %{$idsrules{$rulefile}}) {
 169                         # Skip the current sid if it is not numeric.
 170                         next unless ($sid =~ /\d+/ );
 171
 172                         # Check if there exists a key in the cgiparams hash for this sid.
 173                         if (exists($cgiparams{$sid})) {
 174                                 # Look if the rule is disabled.
 175                                 if ($idsrules{$rulefile}{$sid}{'State'} eq "off") {
 176                                         # Check if the state has been set to 'on'.
 177                                         if ($cgiparams{$sid} eq "on") {
 178                                                 # Add the sid to the enabled_sids array.
 179                                                 push(@enabled_sids, $sid);
 180
 181                                                 # Drop item from cgiparams hash.
 182                                                 delete $cgiparams{$rulefile}{$sid};
 183                                         }
 184                                 }
 185                         } else {
 186                                 # Look if the rule is enabled.
 187                                 if ($idsrules{$rulefile}{$sid}{'State'} eq "on") {
 188                                         # Check if the state is 'on' and should be disabled.
 189                                         # In this case there is no entry
 190                                         # for the sid in the cgiparams hash.
 191                                         # Add it to the disabled_sids array.
 192                                         push(@disabled_sids, $sid);
 193
 194                                         # Drop item from cgiparams hash.
 195                                         delete $cgiparams{$rulefile}{$sid};
 196                                 }
 197                         }
 198                 }
 199         }
 200
 201         # Open enabled sid's file for writing.
 202         open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
 203
 204         # Write header to file.
 205         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 206
 207         # Check if the enabled_sids array contains any sid's.
 208         if (@enabled_sids) {
 209                 # Loop through the array of enabled sids and write them to the file.
 210                 foreach my $sid (@enabled_sids) {
 211                         print FILE "enablesid $sid\n";
 212                 }
 213         }
 214
 215         # Close file after writing.
 216         close(FILE);
 217
 218         # Open disabled sid's file for writing.
 219         open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
 220
 221         # Write header to file.
 222         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 223
 224         # Check if the enabled_sids array contains any sid's.
 225         if (@disabled_sids) {
 226                 # Loop through the array of disabled sids and write them to the file.
 227                 foreach my $sid (@disabled_sids) {
 228                         print FILE "disablesid $sid\n";
 229                 }
 230         }
 231
 232         # Close file after writing.
 233         close(FILE);
 234
 235         # Open file for used rulefiles.
 236         open (FILE, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
 237
 238         # Write header to file.
 239         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 240
 241         # Check if the enabled_rulefiles array contains any entries.
 242         if (@enabled_rulefiles) {
 243                 # Loop through the array of rulefiles which should be loaded and write the to the file.
 244                 foreach my $file (@enabled_rulefiles) {
 245                         print FILE "include \$RULE_PATH/$file\n";
 246                 }
 247         }
 248
 249         # Close file after writing.
 250         close(FILE);
 251
 252         # Lock the webpage and print message.
 253         &working_notice("$Lang::tr{'snort working'}");
 254
 255         # Call oinkmaster to alter the ruleset.
 256         &IDS::oinkmaster();
 257
 258         # Reload page.
 259         &reload();
 260
 261 # Download new ruleset.
 262 } elsif ($cgiparams{'RULESET'} eq $Lang::tr{'download new ruleset'}) {
 263         # Check if the red device is active.
 264         unless (-e "${General::swroot}/red/active") {
 265                 $errormessage = $Lang::tr{'could not download latest updates'};
 266         }
 267
 268         # Check if enought free disk space is availabe.
 269         $errormessage = &IDS::checkdiskspace();
 270
 271         # Check if any errors happend.
 272         unless ($errormessage) {
 273                 # Lock the webpage and print notice about downloading
 274                 # a new ruleset.
 275                 &working_notice("$Lang::tr{'snort working'}");
 276
 277                 # Call subfunction to download the ruleset.
 278                 $errormessage = &IDS::downloadruleset();
 279
 280                 # Check if the downloader returned an error.
 281                 if ($errormessage) {
 282                         # Call function to store the errormessage.
 283                         &IDS::log_error($errormessage);
 284
 285                         # Preform a reload of the page.
 286                         &reload();
 287                 } else {
 288                         # Call subfunction to launch oinkmaster.
 289                         &IDS::oinkmaster();
 290
 291                         # Perform a reload of the page.
 292                         &reload();
 293                 }
 294         }
 295 # Save snort settings.
 296 } elsif ($cgiparams{'SNORT'} eq $Lang::tr{'save'}) {
 297         # Prevent form name from been stored in conf file.
 298         delete $cgiparams{'SNORT'};
 299
 300         # Check if an oinkcode has been provided.
 301         if ($cgiparams{'OINKCODE'}) {
 302                 # Check if the oinkcode contains unallowed chars.
 303                 unless ($cgiparams{'OINKCODE'} =~ /^[a-z0-9]+$/) {
 304                         $errormessage = $Lang::tr{'invalid input for oink code'};
 305                 }
 306         }
 307
 308         # Go on if there are no error messages.
 309         if (!$errormessage) {
 310                 # Store settings into settings file.
 311                 &General::writehash("${General::swroot}/snort/settings", \%cgiparams);
 312
 313                 # Call snortctrl to restart snort
 314                 system('/usr/local/bin/snortctrl restart >/dev/null');
 315         }
 316 }
 317
 318 # Read-in snortsettings
 319 &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 320
 321 $checked{'ENABLE_SNORT'}{'off'} = '';
 322 $checked{'ENABLE_SNORT'}{'on'} = '';
 323 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 324 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 325 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 326 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 327 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 328 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 329 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 330 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 331 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 332 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 333 $selected{'RULES'}{'nothing'} = '';
 334 $selected{'RULES'}{'community'} = '';
 335 $selected{'RULES'}{'emerging'} = '';
 336 $selected{'RULES'}{'registered'} = '';
 337 $selected{'RULES'}{'subscripted'} = '';
 338 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 339
 340 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 341
 342 ### Java Script ###
 343 print <<END
 344 <script>
 345         // Tiny java script function to show/hide the rules
 346         // of a given category.
 347         function showhide(tblname) {
 348                 \$("#" + tblname).toggle();
 349         }
 350 </script>
 351 END
 352 ;
 353
 354 &Header::openbigbox('100%', 'left', '', $errormessage);
 355
 356 if ($errormessage) {
 357         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 358         print "<class name='base'>$errormessage\n";
 359         print "&nbsp;</class>\n";
 360         &Header::closebox();
 361 }
 362
 363 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 364
 365 my $rulesdate;
 366
 367 # Check if a ruleset allready has been downloaded.
 368 if ( -f "$IDS::rulestarball"){
 369         # Call stat on the filename to obtain detailed information.
 370         my @Info = stat("$IDS::rulestarball");
 371
 372         # Grab details about the creation time.
 373         $rulesdate = localtime($Info[9]);
 374 }
 375
 376 print <<END
 377 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 378         <table width='100%' border='0'>
 379                 <tr>
 380                         <td class='base' width='25%'>
 381                                 <input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'}>RED Snort
 382                         </td>
 383
 384                         <td class='base' width='25%'>
 385                                 <input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'}>GREEN Snort
 386                         </td>
 387
 388                         <td class='base' width='25%'>
 389 END
 390 ;
 391
 392 # Check if a blue device is configured.
 393 if ($netsettings{'BLUE_DEV'}) {
 394   print "<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />BLUE Snort\n";
 395 }
 396
 397 print "</td>\n";
 398
 399 print "<td width='25%'>\n";
 400
 401 # Check if an orange device is configured.
 402 if ($netsettings{'ORANGE_DEV'}) {
 403   print "<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />ORANGE Snort\n";
 404 }
 405
 406 print <<END
 407                         </td>
 408                 </tr>
 409
 410                 <tr>
 411                         <td colspan='4'><br><br></td>
 412                 </tr>
 413
 414                 <tr>
 415                         <td colspan='4'><b>$Lang::tr{'ids rules update'}</b></td>
 416                 </tr>
 417
 418                 <tr>
 419                         <td colspan='4'><select name='RULES'>
 420                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 421                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 422                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 423                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 424                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 425                         </select>
 426                         </td>
 427                 </tr>
 428
 429                 <tr>
 430                         <td colspan='4'>
 431                                 <br>$Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}</br>
 432                                 <br>$Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}</br>
 433                         </td>
 434                 </tr>
 435
 436                 <tr>
 437                         <td colspan='4' nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}'></td>
 438                 </tr>
 439
 440                 <tr>
 441                         <td colspan='4' align='left'><br>
 442                                 <input type='submit' name='RULESET' value='$Lang::tr{'download new ruleset'}'>&nbsp;$Lang::tr{'updates installed'}: $rulesdate
 443                         </td>
 444
 445                 </tr>
 446         </table>
 447
 448         <br><br>
 449
 450         <table width='100%'>
 451                 <tr>
 452                         <td align='right'><input type='submit' name='SNORT' value='$Lang::tr{'save'}' /></td>
 453                 </tr>
 454         </table>
 455 </form>
 456 END
 457 ;
 458
 459 &Header::closebox();
 460
 461 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 462         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 463
 464         # Output display table for rule files
 465         print "<table width='100%'>\n";
 466
 467         # Local variable required for java script to show/hide
 468         # rules of a rulefile.
 469         my $rulesetcount = 1;
 470
 471         # Loop over each rule file
 472         foreach my $rulefile (sort keys(%idsrules)) {
 473                 my $rulechecked = '';
 474
 475                 # Check if rule file is enabled
 476                 if ($idsrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 477                         $rulechecked = 'CHECKED';
 478                 }
 479
 480                 # Table and rows for the rule files.
 481                 print"<tr>\n";
 482                 print"<td class='base' width='5%'>\n";
 483                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 484                 print"</td>\n";
 485                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 486                 print"<td class='base' width='5%' align='right'>\n";
 487                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 488                 print"</td>\n";
 489                 print"</tr>\n";
 490
 491                 # Rows which will be hidden per default and will contain the single rules.
 492                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 493                 print"<td colspan='3'>\n";
 494
 495                 # Local vars
 496                 my $lines;
 497                 my $rows;
 498                 my $col;
 499
 500                 # New table for the single rules.
 501                 print "<table width='100%'>\n";
 502
 503                 # Loop over rule file rules
 504                 foreach my $sid (sort {$a <=> $b} keys(%{$idsrules{$rulefile}})) {
 505                         # Local vars
 506                         my $ruledefchecked = '';
 507
 508                         # Skip rulefile itself.
 509                         next if ($sid eq "Rulefile");
 510
 511                         # If 2 rules have been displayed, start a new row
 512                         if (($lines % 2) == 0) {
 513                                 print "</tr><tr>\n";
 514
 515                                 # Increase rows by once.
 516                                 $rows++;
 517                         }
 518
 519                         # Colour lines.
 520                         if ($rows % 2) {
 521                                 $col="bgcolor='$color{'color20'}'";
 522                         } else {
 523                                 $col="bgcolor='$color{'color22'}'";
 524                         }
 525
 526                         # Set rule state
 527                         if ($idsrules{$rulefile}{$sid}{'State'} eq 'on') {
 528                                 $ruledefchecked = 'CHECKED';
 529                         }
 530
 531                         # Create rule checkbox and display rule description
 532                         print "<td class='base' width='5%' align='right' $col>\n";
 533                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 534                         print "</td>\n";
 535                         print "<td class='base' width='45%' $col>$idsrules{$rulefile}{$sid}{'Description'}</td>";
 536
 537                         # Increment rule count
 538                         $lines++;
 539                 }
 540
 541                 # If do not have a second rule for row, create empty cell
 542                 if (($lines % 2) != 0) {
 543                         print "<td class='base'></td>";
 544                 }
 545
 546                 # Close display table
 547                 print "</tr></table></td></tr>";
 548
 549                 # Finished whith the rule file, increase count.
 550                 $rulesetcount++;
 551         }
 552
 553         # Close display table
 554         print "</table>";
 555
 556 print <<END
 557 <table width='100%'>
 558 <tr>
 559         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 560                 &nbsp; <!-- space for future online help link -->
 561         </td>
 562 </tr>
 563 </table>
 564 </form>
 565 END
 566 ;
 567 &Header::closebox();
 568 &Header::closebigbox();
 569 &Header::closepage();
 570
 571 #
 572 ## A function to display a notice, to lock the webpage and
 573 ## tell the user which action currently will be performed.
 574 #
 575 sub working_notice ($) {
 576         my ($message) = @_;
 577
 578         &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 579         &Header::openbigbox('100%', 'left', '', $errormessage);
 580         &Header::openbox( 'Waiting', 1,);
 581                 print <<END;
 582                         <table>
 583                                 <tr>
 584                                         <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
 585                                         <td>$message</td>
 586                                 </tr>
 587                         </table>
 588 END
 589         &Header::closebox();
 590         &Header::closebigbox();
 591         &Header::closepage();
 592 }
 593
 594 #
 595 ## A tiny function to perform a reload of the webpage after one second.
 596 #
 597 sub reload () {
 598         print "<meta http-equiv='refresh' content='1'>\n";
 599
 600         # Stop the script.
 601         exit;
 602 }
 603
 604 #
 605 ## Private function to read-in and parse rules of a given rulefile.
 606 #
 607 ## The given file will be read, parsed and all valid rules will be stored by ID,
 608 ## message/description and it's state in the idsrules hash.
 609 #
 610 sub readrulesfile ($) {
 611         my $rulefile = shift;
 612
 613         # Open rule file and read in contents
 614         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 615
 616         # Store file content in an array.
 617         my @lines = <RULEFILE>;
 618
 619         # Close file.
 620         close(RULEFILE);
 621
 622         # Loop over rule file contents
 623         foreach my $line (@lines) {
 624                 # Remove whitespaces.
 625                 chomp $line;
 626
 627                 # Skip blank  lines.
 628                 next if ($line =~ /^\s*$/);
 629
 630                 # Local vars.
 631                 my $sid;
 632                 my $msg;
 633
 634                 # Gather rule sid and message from the ruleline.
 635                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 636                         $msg = $1;
 637                         $sid = $2;
 638
 639                         # Check if a rule has been found.
 640                         if ($sid && $msg) {
 641                                 # Add rule to the idsrules hash.
 642                                 $idsrules{$rulefile}{$sid}{'Description'} = $msg;
 643
 644                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 645                                 if ($line =~ /^\#/) {
 646                                         # If yes, the rule is disabled.
 647                                         $idsrules{$rulefile}{$sid}{'State'} = "off";
 648                                 } else {
 649                                         # Otherwise the rule is enabled.
 650                                         $idsrules{$rulefile}{$sid}{'State'} = "on";
 651                                 }
 652                         }
 653                 }
 654         }
 655 }