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 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  36 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  37
  38 my %snortsettings=();
  39 my %checked=();
  40 my %selected=();
  41 my %netsettings=();
  42 our $errormessage = '';
  43 our $results = '';
  44 our $tempdir = '';
  45 our $url='';
  46 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  47
  48 &Header::showhttpheaders();
  49
  50 $snortsettings{'ENABLE_SNORT'} = 'off';
  51 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  52 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  53 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  54 $snortsettings{'ACTION'} = '';
  55 $snortsettings{'RULES'} = '';
  56 $snortsettings{'OINKCODE'} = '';
  57 $snortsettings{'INSTALLDATE'} = '';
  58 $snortsettings{'FILE'} = '';
  59
  60 &Header::getcgihash(\%snortsettings, {'wantfile' => 1, 'filevar' => 'FH'});
  61
  62 my $snortrulepath = "/etc/snort/rules";
  63 my $restartsnortrequired = 0;
  64 my %snortrules;
  65 my $rule = '';
  66 my $table1colour = '';
  67 my $table2colour = '';
  68 my $var = '';
  69 my $value = '';
  70 my $tmp = '';
  71 my $linkedrulefile = '';
  72 my $border = '';
  73 my $checkboxname = '';
  74
  75 ## Grab all available snort rules and store them in the snortrules hash.
  76 #
  77 # Open snort rules directory and do a directory listing.
  78 opendir(DIR, $snortrulepath) or die $!;
  79         # Loop through the direcory.
  80         while (my $file = readdir(DIR)) {
  81
  82                 # We only want files.
  83                 next unless (-f "$snortrulepath/$file");
  84
  85                 # Ignore empty files.
  86                 next if (-z "$snortrulepath/$file");
  87
  88                 # Use a regular expression to find files ending in .rules
  89                 next unless ($file =~ m/\.rules$/);
  90
  91                 # Ignore files which are not read-able.
  92                 next unless (-R "$snortrulepath/$file");
  93
  94                 # Call subfunction to read-in rulefile and add rules to
  95                 # the snortrules hash.
  96                 &readrulesfile("$file");
  97         }
  98
  99 closedir(DIR);
 100
 101 if ($snortsettings{'OINKCODE'} ne "") {
 102         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 103 }
 104
 105 if (!$errormessage) {
 106         if ($snortsettings{'RULES'} eq 'subscripted') {
 107                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 108         } elsif ($snortsettings{'RULES'} eq 'registered') {
 109                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 110         } elsif ($snortsettings{'RULES'} eq 'community') {
 111                 $url=" https://www.snort.org/rules/community";
 112         } else {
 113                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 114         }
 115
 116         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 117                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 118                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 119                 {
 120                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 121                 } else {
 122                         unlink "${General::swroot}/snort/enable";
 123                 }
 124                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 125                 {
 126                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 127                 } else {
 128                         unlink "${General::swroot}/snort/enable_green";
 129                 }
 130                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 131                 {
 132                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 133                 } else {
 134                         unlink "${General::swroot}/snort/enable_blue";
 135                 }
 136                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 137                 {
 138                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 139                 } else {
 140                         unlink "${General::swroot}/snort/enable_orange";
 141                 }
 142                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 143                 {
 144                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 145                 } else {
 146                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 147                 }
 148
 149                 system('/usr/local/bin/snortctrl restart >/dev/null');
 150         }
 151
 152         # INSTALLMD5 is not in the form, so not retrieved by getcgihash
 153         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 154
 155         if ($snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 156                 my @df = `/bin/df -B M /var`;
 157                 foreach my $line (@df) {
 158                         next if $line =~ m/^Filesystem/;
 159                         my $return;
 160
 161                         if ($line =~ m/dev/ ) {
 162                                 $line =~ m/^.* (\d+)M.*$/;
 163                                 my @temp = split(/ +/,$line);
 164                                 if ($1<300) {
 165                                         $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 166                                 } else {
 167                                         if ( $snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 168                                                 &downloadrulesfile();
 169                                                 sleep(3);
 170                                                 $return = `cat /var/tmp/log 2>/dev/null`;
 171
 172                                         }
 173
 174                                         if ($return =~ "ERROR") {
 175                                                 $errormessage = "<br /><pre>".$return."</pre>";
 176                                         } else {
 177                                                 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 &");
 178                                                 sleep(2);
 179                                         }
 180                                 }
 181                         }
 182                 }
 183         }
 184 }
 185
 186 $checked{'ENABLE_SNORT'}{'off'} = '';
 187 $checked{'ENABLE_SNORT'}{'on'} = '';
 188 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 189 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 190 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 191 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 192 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 193 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 194 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 195 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 196 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 197 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 198 $selected{'RULES'}{'nothing'} = '';
 199 $selected{'RULES'}{'community'} = '';
 200 $selected{'RULES'}{'emerging'} = '';
 201 $selected{'RULES'}{'registered'} = '';
 202 $selected{'RULES'}{'subscripted'} = '';
 203 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 204
 205 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 206
 207 print "<script type='text/javascript' src='/include/snortupdateutility.js'></script>";
 208 print <<END
 209 <style type="text/css">
 210 <!--
 211 .section {
 212         border: groove;
 213 }
 214 .row1color {
 215         border: ridge;
 216         background-color: $color{'color22'};
 217 }
 218 .row2color {
 219         border: ridge;
 220         background-color: $color{'color20'};
 221 }
 222 .rowselected {
 223         border: double #FF0000;
 224         background-color: #DCDCDC;
 225 }
 226 -->
 227 </style>
 228 END
 229 ;
 230
 231 &Header::openbigbox('100%', 'left', '', $errormessage);
 232
 233 ###############
 234 # DEBUG DEBUG
 235 # &Header::openbox('100%', 'left', 'DEBUG');
 236 # my $debugCount = 0;
 237 # foreach my $line (sort keys %snortsettings) {
 238 # print "$line = $snortsettings{$line}<br />\n";
 239 # $debugCount++;
 240 # }
 241 # print "&nbsp;Count: $debugCount\n";
 242 # &Header::closebox();
 243 # DEBUG DEBUG
 244 ###############
 245
 246 if ($errormessage) {
 247         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 248         print "<class name='base'>$errormessage\n";
 249         print "&nbsp;</class>\n";
 250         &Header::closebox();
 251 }
 252
 253 my $return = `pidof oinkmaster.pl -x`;
 254 chomp($return);
 255 if ($return) {
 256         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 257         print <<END;
 258         <table>
 259                 <tr><td>
 260                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 261                         <td>
 262                                 $Lang::tr{'snort working'}
 263                 <tr><td colspan='2' align='center'>
 264                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 265                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 266                         </form>
 267                 <tr><td colspan='2' align='left'><pre>
 268 END
 269         my @output = `tail -20 /var/tmp/log`;
 270         foreach (@output) {
 271                 print "$_";
 272         }
 273         print <<END;
 274                         </pre>
 275                 </table>
 276 END
 277         &Header::closebox();
 278         &Header::closebigbox();
 279         &Header::closepage();
 280         exit;
 281         refreshpage();
 282 }
 283
 284 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 285 print <<END
 286 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 287 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 288 END
 289 ;
 290 if ($netsettings{'BLUE_DEV'} ne '') {
 291   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 292 }
 293 if ($netsettings{'ORANGE_DEV'} ne '') {
 294   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 295 }
 296   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 297
 298 print <<END
 299 </td></tr>
 300 <tr>
 301         <td><br><br></td>
 302 </tr>
 303 <tr>
 304         <td><b>$Lang::tr{'ids rules update'}</b></td>
 305 </tr>
 306 <tr>
 307         <td><select name='RULES'>
 308                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 309                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 310                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 311                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 312                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 313                         </select>
 314         </td>
 315 </tr>
 316 <tr>
 317         <td><br />
 318                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 319                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 320         </td>
 321 </tr>
 322 <tr>
 323         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 324 </tr>
 325 <tr>
 326         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 327 END
 328 ;
 329 if ( -e "/var/tmp/snortrules.tar.gz"){
 330         my @Info = stat("/var/tmp/snortrules.tar.gz");
 331         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 332 }
 333 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 334
 335 print <<END
 336 </tr>
 337 </table>
 338 <br><br>
 339 <table width='100%'>
 340 <tr>
 341         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 342 </tr>
 343 </table>
 344 </form>
 345 END
 346 ;
 347
 348 if ($results ne '') {
 349         print "$results";
 350 }
 351
 352 &Header::closebox();
 353
 354 if ( -e "${General::swroot}/snort/enable" || -e "${General::swroot}/snort/enable_green" || -e "${General::swroot}/snort/enable_blue" || -e "${General::swroot}/snort/enable_orange" ) {
 355         &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 356                 # Output display table for rule files
 357                 print "<table width='100%'><tr><td valign='top'><table>";
 358
 359                 print "<form method='post'>";
 360
 361                 # Local vars
 362                 my $ruledisplaycnt = 1;
 363                 my $rulecnt = keys %snortrules;
 364                 $rulecnt++;
 365                 $rulecnt = $rulecnt / 2;
 366
 367                 # Loop over each rule file
 368                 foreach my $rulefile (sort keys(%snortrules)) {
 369                         my $rulechecked = '';
 370
 371                         # Hide inkompatible Block rules
 372                         if ($rulefile =~'-BLOCK.rules') {
 373                                 next;
 374                         }
 375
 376                         # Check if reached half-way through rule file rules to start new column
 377                 if ($ruledisplaycnt > $rulecnt) {
 378                                 print "</table></td><td valign='top'><table>";
 379                                 $ruledisplaycnt = 0;
 380                         }
 381
 382                         # Check if rule file is enabled
 383                         if ($snortrules{$rulefile}{"State"} eq 'Enabled') {
 384                                 $rulechecked = 'CHECKED';
 385                         }
 386
 387                         # Create rule file link, vars array, and display flag
 388                         my $rulefilelink = "?RULEFILE=$rulefile";
 389                         my $rulefiletoclose = '';
 390                         my @queryvars = ();
 391                         my $displayrulefilerules = 0;
 392
 393                         # Check for passed in query string
 394                         if ($ENV{'QUERY_STRING'}) {
 395                                 # Split out vars
 396                                 @queryvars = split(/\&/, $ENV{'QUERY_STRING'});
 397
 398                                 # Loop over values
 399                                 foreach $value (@queryvars) {
 400                                         # Split out var pairs
 401                                         ($var, $linkedrulefile) = split(/=/, $value);
 402
 403                                         # Check if var is 'RULEFILE'
 404                                         if ($var eq 'RULEFILE') {
 405                                                 # Check if rulefile equals linkedrulefile
 406                                                 if ($rulefile eq $linkedrulefile) {
 407                                                         # Set display flag
 408                                                         $displayrulefilerules = 1;
 409
 410                                                         # Strip out rulefile from rulefilelink
 411                                                         $rulefilelink =~ s/RULEFILE=$linkedrulefile//g;
 412                                                 } else {
 413                                                         # Add linked rule file to rulefilelink
 414                                                         $rulefilelink .= "&RULEFILE=$linkedrulefile";
 415                                                 }
 416                                         }
 417                                 }
 418                         }
 419
 420                         # Strip out extra & & ? from rulefilelink
 421                         $rulefilelink =~ s/^\?\&/\?/i;
 422
 423                         # Check for a single '?' and replace with page for proper link display
 424                         if ($rulefilelink eq '?') {
 425                                 $rulefilelink = "ids.cgi";
 426                         }
 427
 428                         # Output rule file name and checkbox
 429                         print "<tr><td class='base' valign='top'><input type='checkbox' NAME='SNORT_RULE_$rulefile' $rulechecked> <a href='$rulefilelink'>$rulefile</a></td></tr>";
 430                         print "<tr><td class='base' valign='top'>";
 431
 432                         # Check for empty 'Description'
 433                         if ($snortrules{$rulefile}{'Description'} eq '') {
 434                                 print "<table width='100%'><tr><td class='base'>No description available</td></tr>";
 435                         } else {
 436                                 # Output rule file 'Description'
 437                                 print "<table width='100%'><tr><td class='base'>$snortrules{$rulefile}{'Description'}</td></tr>";
 438                         }
 439
 440                         # Check for display flag
 441                         if ($displayrulefilerules) {
 442                                 # Rule file definition rule display
 443                                 print "<tr><td class='base' valign='top'><table border='0'><tr>";
 444
 445                                 # Local vars
 446                                 my $ruledefdisplaycnt = 0;
 447                                 my $ruledefcnt = keys %{$snortrules{$rulefile}{"Definition"}};
 448                                 $ruledefcnt++;
 449                                 $ruledefcnt = $ruledefcnt / 2;
 450
 451                                 # Loop over rule file rules
 452                                 foreach my $ruledef (sort {$a <=> $b} keys(%{$snortrules{$rulefile}{"Definition"}})) {
 453                                         # Local vars
 454                                         my $ruledefchecked = '';
 455
 456                                         # If have display 2 rules, start new row
 457                                         if (($ruledefdisplaycnt % 2) == 0) {
 458                                                 print "</tr><tr>";
 459                                                 $ruledefdisplaycnt = 0;
 460                                         }
 461
 462                                         # Check for rules state
 463                                         if ($snortrules{$rulefile}{'Definition'}{$ruledef}{'State'} eq 'Enabled') {
 464                                                 $ruledefchecked = 'CHECKED';
 465                                         }
 466
 467                                         # Create rule file rule's checkbox
 468                                         $checkboxname = "SNORT_RULE_$rulefile";
 469                                         $checkboxname .= "_$ruledef";
 470                                         print "<td class='base'><input type='checkbox' NAME='$checkboxname' $ruledefchecked> $snortrules{$rulefile}{'Definition'}{$ruledef}{'Description'}</td>";
 471
 472                                         # Increment count
 473                                         $ruledefdisplaycnt++;
 474                                 }
 475
 476                                 # If do not have second rule for row, create empty cell
 477                                 if (($ruledefdisplaycnt % 2) != 0) {
 478                                         print "<td class='base'></td>";
 479                                 }
 480
 481                                 # Close display table
 482                                 print "</tr></table></td></tr>";
 483                 }
 484
 485                         # Close display table
 486                         print "</table>";
 487
 488                         # Increment ruledisplaycnt
 489                 $ruledisplaycnt++;
 490                 }
 491         print "</td></tr></table></td></tr></table>";
 492         print <<END
 493 <table width='100%'>
 494 <tr>
 495         <td width='100%' align='right'><input type='submit' name='ACTION' value='$Lang::tr{'update'}' /></td>
 496                 &nbsp; <!-- space for future online help link -->
 497         </td>
 498 </tr>
 499 </table>
 500 </form>
 501 END
 502 ;
 503         &Header::closebox();
 504 }
 505
 506 &Header::closebigbox();
 507 &Header::closepage();
 508
 509 sub refreshpage {
 510         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 511                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 512         &Header::closebox();
 513 }
 514
 515 sub downloadrulesfile {
 516         my $peer;
 517         my $peerport;
 518
 519         unlink("/var/tmp/log");
 520
 521         unless (-e "${General::swroot}/red/active") {
 522                 $errormessage = $Lang::tr{'could not download latest updates'};
 523                 return undef;
 524         }
 525
 526         my %proxysettings=();
 527         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 528
 529         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 530                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 531         }
 532
 533         if ($peer) {
 534                 system("wget -r --proxy=on --proxy-user=$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");
 535         } else {
 536                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 537         }
 538 }
 539
 540 sub readrulesfile ($) {
 541         my $rulefile = shift;
 542
 543         # Open rule file and read in contents
 544         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 545
 546         # Store file content in an array.
 547         my @lines = <RULEFILE>;
 548
 549         # Close file.
 550         close(RULEFILE);
 551
 552         # Loop over rule file contents
 553         foreach my $line (@lines) {
 554                 # Remove whitespaces.
 555                 chomp $line;
 556
 557                 # Skip blank  lines.
 558                 next if ($line =~ /^\s*$/);
 559
 560                 # Local vars.
 561                 my $sid;
 562                 my $msg;
 563
 564                 # Gather rule sid and message from the ruleline.
 565                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 566                         $msg = $1;
 567                         $sid = $2;
 568
 569                         # Check if a rule has been found.
 570                         if ($sid && $msg) {
 571                                 # Add rule to the snortrules hash.
 572                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 573
 574                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 575                                 if ($line =~ /^\#/) {
 576                                         # If yes, the rule is disabled.
 577                                         $snortrules{$rulefile}{$sid}{'State'} = "Disabled";
 578                                 } else {
 579                                         # Otherwise the rule is enabled.
 580                                         $snortrules{$rulefile}{$sid}{'State'} = "Enabled";
 581                                 }
 582                         }
 583                 }
 584         }
 585 }