html/cgi-bin/ids.cgi

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