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 ####################### Added for snort rules control #################################
  63
  64 my $snortrulepath = "/etc/snort/rules";
  65 my $restartsnortrequired = 0;
  66 my %snortrules;
  67 my $rule = '';
  68 my $table1colour = '';
  69 my $table2colour = '';
  70 my $var = '';
  71 my $value = '';
  72 my $tmp = '';
  73 my $linkedrulefile = '';
  74 my $border = '';
  75 my $checkboxname = '';
  76
  77 ## Grab all available snort rules and store them in the snortrules hash.
  78 #
  79 # Open snort rules directory and do a directory listing.
  80 opendir(DIR, $snortrulepath) or die $!;
  81         # Loop through the direcory.
  82         while (my $file = readdir(DIR)) {
  83
  84                 # We only want files.
  85                 next unless (-f "$snortrulepath/$file");
  86
  87                 # Ignore empty files.
  88                 next if (-z "$snortrulepath/$file");
  89
  90                 # Use a regular expression to find files ending in .rules
  91                 next unless ($file =~ m/\.rules$/);
  92
  93                 # Ignore files which are not read-able.
  94                 next unless (-R "$snortrulepath/$file");
  95
  96                 # Call subfunction to read-in rulefile and add rules to
  97                 # the snortrules hash.
  98                 &readrulesfile("$file");
  99         }
 100
 101 closedir(DIR);
 102
 103 #######################  End added for snort rules control  #################################
 104
 105 if ($snortsettings{'OINKCODE'} ne "") {
 106         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 107 }
 108
 109 if (!$errormessage) {
 110         if ($snortsettings{'RULES'} eq 'subscripted') {
 111                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 112         } elsif ($snortsettings{'RULES'} eq 'registered') {
 113                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 114         } elsif ($snortsettings{'RULES'} eq 'community') {
 115                 $url=" https://www.snort.org/rules/community";
 116         } else {
 117                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 118         }
 119
 120         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 121                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 122                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 123                 {
 124                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 125                 } else {
 126                         unlink "${General::swroot}/snort/enable";
 127                 }
 128                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 129                 {
 130                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 131                 } else {
 132                         unlink "${General::swroot}/snort/enable_green";
 133                 }
 134                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 135                 {
 136                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 137                 } else {
 138                         unlink "${General::swroot}/snort/enable_blue";
 139                 }
 140                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 141                 {
 142                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 143                 } else {
 144                         unlink "${General::swroot}/snort/enable_orange";
 145                 }
 146                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 147                 {
 148                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 149                 } else {
 150                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 151                 }
 152
 153                 system('/usr/local/bin/snortctrl restart >/dev/null');
 154         }
 155
 156         # INSTALLMD5 is not in the form, so not retrieved by getcgihash
 157         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 158
 159         if ($snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 160                 my @df = `/bin/df -B M /var`;
 161                 foreach my $line (@df) {
 162                         next if $line =~ m/^Filesystem/;
 163                         my $return;
 164
 165                         if ($line =~ m/dev/ ) {
 166                                 $line =~ m/^.* (\d+)M.*$/;
 167                                 my @temp = split(/ +/,$line);
 168                                 if ($1<300) {
 169                                         $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 170                                 } else {
 171                                         if ( $snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 172                                                 &downloadrulesfile();
 173                                                 sleep(3);
 174                                                 $return = `cat /var/tmp/log 2>/dev/null`;
 175
 176                                         }
 177
 178                                         if ($return =~ "ERROR") {
 179                                                 $errormessage = "<br /><pre>".$return."</pre>";
 180                                         } else {
 181                                                 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 &");
 182                                                 sleep(2);
 183                                         }
 184                                 }
 185                         }
 186                 }
 187         }
 188 }
 189
 190 $checked{'ENABLE_SNORT'}{'off'} = '';
 191 $checked{'ENABLE_SNORT'}{'on'} = '';
 192 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 193 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 194 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 195 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 196 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 197 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 198 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 199 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 200 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 201 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 202 $selected{'RULES'}{'nothing'} = '';
 203 $selected{'RULES'}{'community'} = '';
 204 $selected{'RULES'}{'emerging'} = '';
 205 $selected{'RULES'}{'registered'} = '';
 206 $selected{'RULES'}{'subscripted'} = '';
 207 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 208
 209 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 210
 211 ####################### Added for snort rules control #################################
 212 print "<script type='text/javascript' src='/include/snortupdateutility.js'></script>";
 213 print <<END
 214 <style type="text/css">
 215 <!--
 216 .section {
 217         border: groove;
 218 }
 219 .row1color {
 220         border: ridge;
 221         background-color: $color{'color22'};
 222 }
 223 .row2color {
 224         border: ridge;
 225         background-color: $color{'color20'};
 226 }
 227 .rowselected {
 228         border: double #FF0000;
 229         background-color: #DCDCDC;
 230 }
 231 -->
 232 </style>
 233 END
 234 ;
 235 #######################  End added for snort rules control  #################################
 236
 237 &Header::openbigbox('100%', 'left', '', $errormessage);
 238
 239 ###############
 240 # DEBUG DEBUG
 241 # &Header::openbox('100%', 'left', 'DEBUG');
 242 # my $debugCount = 0;
 243 # foreach my $line (sort keys %snortsettings) {
 244 # print "$line = $snortsettings{$line}<br />\n";
 245 # $debugCount++;
 246 # }
 247 # print "&nbsp;Count: $debugCount\n";
 248 # &Header::closebox();
 249 # DEBUG DEBUG
 250 ###############
 251
 252 if ($errormessage) {
 253         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 254         print "<class name='base'>$errormessage\n";
 255         print "&nbsp;</class>\n";
 256         &Header::closebox();
 257 }
 258
 259 my $return = `pidof oinkmaster.pl -x`;
 260 chomp($return);
 261 if ($return) {
 262         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 263         print <<END;
 264         <table>
 265                 <tr><td>
 266                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 267                         <td>
 268                                 $Lang::tr{'snort working'}
 269                 <tr><td colspan='2' align='center'>
 270                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 271                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 272                         </form>
 273                 <tr><td colspan='2' align='left'><pre>
 274 END
 275         my @output = `tail -20 /var/tmp/log`;
 276         foreach (@output) {
 277                 print "$_";
 278         }
 279         print <<END;
 280                         </pre>
 281                 </table>
 282 END
 283         &Header::closebox();
 284         &Header::closebigbox();
 285         &Header::closepage();
 286         exit;
 287         refreshpage();
 288 }
 289
 290 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 291 print <<END
 292 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 293 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 294 END
 295 ;
 296 if ($netsettings{'BLUE_DEV'} ne '') {
 297   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 298 }
 299 if ($netsettings{'ORANGE_DEV'} ne '') {
 300   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 301 }
 302   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 303
 304 print <<END
 305 </td></tr>
 306 <tr>
 307         <td><br><br></td>
 308 </tr>
 309 <tr>
 310         <td><b>$Lang::tr{'ids rules update'}</b></td>
 311 </tr>
 312 <tr>
 313         <td><select name='RULES'>
 314                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 315                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 316                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 317                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 318                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 319                         </select>
 320         </td>
 321 </tr>
 322 <tr>
 323         <td><br />
 324                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 325                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 326         </td>
 327 </tr>
 328 <tr>
 329         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 330 </tr>
 331 <tr>
 332         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 333 END
 334 ;
 335 if ( -e "/var/tmp/snortrules.tar.gz"){
 336         my @Info = stat("/var/tmp/snortrules.tar.gz");
 337         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 338 }
 339 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 340
 341 print <<END
 342 </tr>
 343 </table>
 344 <br><br>
 345 <table width='100%'>
 346 <tr>
 347         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 348 </tr>
 349 </table>
 350 </form>
 351 END
 352 ;
 353
 354 if ($results ne '') {
 355         print "$results";
 356 }
 357
 358 &Header::closebox();
 359
 360 ####################### Added for snort rules control #################################
 361 if ( -e "${General::swroot}/snort/enable" || -e "${General::swroot}/snort/enable_green" || -e "${General::swroot}/snort/enable_blue" || -e "${General::swroot}/snort/enable_orange" ) {
 362         &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 363                 # Output display table for rule files
 364                 print "<table width='100%'><tr><td valign='top'><table>";
 365
 366                 print "<form method='post'>";
 367
 368                 # Local vars
 369                 my $ruledisplaycnt = 1;
 370                 my $rulecnt = keys %snortrules;
 371                 $rulecnt++;
 372                 $rulecnt = $rulecnt / 2;
 373
 374                 # Loop over each rule file
 375                 foreach my $rulefile (sort keys(%snortrules)) {
 376                         my $rulechecked = '';
 377
 378                         # Hide inkompatible Block rules
 379                         if ($rulefile =~'-BLOCK.rules') {
 380                                 next;
 381                         }
 382
 383                         # Check if reached half-way through rule file rules to start new column
 384                 if ($ruledisplaycnt > $rulecnt) {
 385                                 print "</table></td><td valign='top'><table>";
 386                                 $ruledisplaycnt = 0;
 387                         }
 388
 389                         # Check if rule file is enabled
 390                         if ($snortrules{$rulefile}{"State"} eq 'Enabled') {
 391                                 $rulechecked = 'CHECKED';
 392                         }
 393
 394                         # Create rule file link, vars array, and display flag
 395                         my $rulefilelink = "?RULEFILE=$rulefile";
 396                         my $rulefiletoclose = '';
 397                         my @queryvars = ();
 398                         my $displayrulefilerules = 0;
 399
 400                         # Check for passed in query string
 401                         if ($ENV{'QUERY_STRING'}) {
 402                                 # Split out vars
 403                                 @queryvars = split(/\&/, $ENV{'QUERY_STRING'});
 404
 405                                 # Loop over values
 406                                 foreach $value (@queryvars) {
 407                                         # Split out var pairs
 408                                         ($var, $linkedrulefile) = split(/=/, $value);
 409
 410                                         # Check if var is 'RULEFILE'
 411                                         if ($var eq 'RULEFILE') {
 412                                                 # Check if rulefile equals linkedrulefile
 413                                                 if ($rulefile eq $linkedrulefile) {
 414                                                         # Set display flag
 415                                                         $displayrulefilerules = 1;
 416
 417                                                         # Strip out rulefile from rulefilelink
 418                                                         $rulefilelink =~ s/RULEFILE=$linkedrulefile//g;
 419                                                 } else {
 420                                                         # Add linked rule file to rulefilelink
 421                                                         $rulefilelink .= "&RULEFILE=$linkedrulefile";
 422                                                 }
 423                                         }
 424                                 }
 425                         }
 426
 427                         # Strip out extra & & ? from rulefilelink
 428                         $rulefilelink =~ s/^\?\&/\?/i;
 429
 430                         # Check for a single '?' and replace with page for proper link display
 431                         if ($rulefilelink eq '?') {
 432                                 $rulefilelink = "ids.cgi";
 433                         }
 434
 435                         # Output rule file name and checkbox
 436                         print "<tr><td class='base' valign='top'><input type='checkbox' NAME='SNORT_RULE_$rulefile' $rulechecked> <a href='$rulefilelink'>$rulefile</a></td></tr>";
 437                         print "<tr><td class='base' valign='top'>";
 438
 439                         # Check for empty 'Description'
 440                         if ($snortrules{$rulefile}{'Description'} eq '') {
 441                                 print "<table width='100%'><tr><td class='base'>No description available</td></tr>";
 442                         } else {
 443                                 # Output rule file 'Description'
 444                                 print "<table width='100%'><tr><td class='base'>$snortrules{$rulefile}{'Description'}</td></tr>";
 445                         }
 446
 447                         # Check for display flag
 448                         if ($displayrulefilerules) {
 449                                 # Rule file definition rule display
 450                                 print "<tr><td class='base' valign='top'><table border='0'><tr>";
 451
 452                                 # Local vars
 453                                 my $ruledefdisplaycnt = 0;
 454                                 my $ruledefcnt = keys %{$snortrules{$rulefile}{"Definition"}};
 455                                 $ruledefcnt++;
 456                                 $ruledefcnt = $ruledefcnt / 2;
 457
 458                                 # Loop over rule file rules
 459                                 foreach my $ruledef (sort {$a <=> $b} keys(%{$snortrules{$rulefile}{"Definition"}})) {
 460                                         # Local vars
 461                                         my $ruledefchecked = '';
 462
 463                                         # If have display 2 rules, start new row
 464                                         if (($ruledefdisplaycnt % 2) == 0) {
 465                                                 print "</tr><tr>";
 466                                                 $ruledefdisplaycnt = 0;
 467                                         }
 468
 469                                         # Check for rules state
 470                                         if ($snortrules{$rulefile}{'Definition'}{$ruledef}{'State'} eq 'Enabled') {
 471                                                 $ruledefchecked = 'CHECKED';
 472                                         }
 473
 474                                         # Create rule file rule's checkbox
 475                                         $checkboxname = "SNORT_RULE_$rulefile";
 476                                         $checkboxname .= "_$ruledef";
 477                                         print "<td class='base'><input type='checkbox' NAME='$checkboxname' $ruledefchecked> $snortrules{$rulefile}{'Definition'}{$ruledef}{'Description'}</td>";
 478
 479                                         # Increment count
 480                                         $ruledefdisplaycnt++;
 481                                 }
 482
 483                                 # If do not have second rule for row, create empty cell
 484                                 if (($ruledefdisplaycnt % 2) != 0) {
 485                                         print "<td class='base'></td>";
 486                                 }
 487
 488                                 # Close display table
 489                                 print "</tr></table></td></tr>";
 490                 }
 491
 492                         # Close display table
 493                         print "</table>";
 494
 495                         # Increment ruledisplaycnt
 496                 $ruledisplaycnt++;
 497                 }
 498         print "</td></tr></table></td></tr></table>";
 499         print <<END
 500 <table width='100%'>
 501 <tr>
 502         <td width='100%' align='right'><input type='submit' name='ACTION' value='$Lang::tr{'update'}' /></td>
 503                 &nbsp; <!-- space for future online help link -->
 504         </td>
 505 </tr>
 506 </table>
 507 </form>
 508 END
 509 ;
 510         &Header::closebox();
 511 }
 512
 513 #######################  End added for snort rules control  #################################
 514 &Header::closebigbox();
 515 &Header::closepage();
 516
 517 sub refreshpage {
 518         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 519                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 520         &Header::closebox();
 521 }
 522
 523 sub downloadrulesfile {
 524         my $peer;
 525         my $peerport;
 526
 527         unlink("/var/tmp/log");
 528
 529         unless (-e "${General::swroot}/red/active") {
 530                 $errormessage = $Lang::tr{'could not download latest updates'};
 531                 return undef;
 532         }
 533
 534         my %proxysettings=();
 535         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 536
 537         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 538                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 539         }
 540
 541         if ($peer) {
 542                 system("wget -r --proxy=on --proxy-user=$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");
 543         } else {
 544                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 545         }
 546 }
 547
 548 sub readrulesfile ($) {
 549         my $rulefile = shift;
 550
 551         # Open rule file and read in contents
 552         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 553
 554         # Store file content in an array.
 555         my @lines = <RULEFILE>;
 556
 557         # Close file.
 558         close(RULEFILE);
 559
 560         # Loop over rule file contents
 561         foreach my $line (@lines) {
 562                 # Remove whitespaces.
 563                 chomp $line;
 564
 565                 # Skip blank  lines.
 566                 next if ($line =~ /^\s*$/);
 567
 568                 # Local vars.
 569                 my $sid;
 570                 my $msg;
 571
 572                 # Gather rule sid and message from the ruleline.
 573                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 574                         $msg = $1;
 575                         $sid = $2;
 576
 577                         # Check if a rule has been found.
 578                         if ($sid && $msg) {
 579                                 # Add rule to the snortrules hash.
 580                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 581
 582                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 583                                 if ($line =~ /^\#/) {
 584                                         # If yes, the rule is disabled.
 585                                         $snortrules{$rulefile}{$sid}{'State'} = "Disabled";
 586                                 } else {
 587                                         # Otherwise the rule is enabled.
 588                                         $snortrules{$rulefile}{$sid}{'State'} = "Enabled";
 589                                 }
 590                         }
 591                 }
 592         }
 593 }