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