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 # Get all available ruleset locations.
  51 &General::readhash("${General::swroot}/snort/ruleset-sources.list", \%rulesetsources);
  52
  53 my $rulestarball = "/var/tmp/snortrules.tar.gz";
  54 my $snortrulepath = "/etc/snort/rules";
  55 my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
  56 my $errormessage;
  57
  58 # Hook used to download and update the ruleset,
  59 # if the cgi got called from command line.
  60 if ($ENV{"REMOTE_ADDR"} eq "") {
  61         # Read snortsettings.
  62         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
  63
  64         # Download rules tarball.
  65         $errormessage = &downloadruleset();
  66
  67         # Sleep for one second.
  68         sleep(1);
  69
  70         # Check if there was an error message.
  71         unless ($errormessage) {
  72                 # Call oinkmaster.
  73                 &oinkmaster();
  74         } else {
  75                 # Call logger and log the errormessage.
  76                 system("logger -t oinkmaster $errormessage");
  77         }
  78
  79 exit(0);
  80 }
  81
  82 &Header::showhttpheaders();
  83
  84 # Default settings for snort.
  85 $snortsettings{'ENABLE_SNORT'} = 'off';
  86 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  87 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  88 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  89 $snortsettings{'RULES'} = '';
  90 $snortsettings{'OINKCODE'} = '';
  91
  92 #Get GUI values
  93 &Header::getcgihash(\%cgiparams);
  94
  95 # Try to determine if oinkmaster is running.
  96 my $oinkmaster_pid = `pidof oinkmaster.pl -x`;
  97
  98 # If oinkmaster is running display output.
  99 if ($oinkmaster_pid) {
 100         &working("$Lang::tr{'snort working'}");
 101 }
 102
 103 ## Grab all available snort rules and store them in the snortrules hash.
 104 #
 105 # Open snort rules directory and do a directory listing.
 106 opendir(DIR, $snortrulepath) or die $!;
 107         # Loop through the direcory.
 108         while (my $file = readdir(DIR)) {
 109
 110                 # We only want files.
 111                 next unless (-f "$snortrulepath/$file");
 112
 113                 # Ignore empty files.
 114                 next if (-z "$snortrulepath/$file");
 115
 116                 # Use a regular expression to find files ending in .rules
 117                 next unless ($file =~ m/\.rules$/);
 118
 119                 # Ignore files which are not read-able.
 120                 next unless (-R "$snortrulepath/$file");
 121
 122                 # Call subfunction to read-in rulefile and add rules to
 123                 # the snortrules hash.
 124                 &readrulesfile("$file");
 125         }
 126
 127 closedir(DIR);
 128
 129 # Gather used rulefiles.
 130 #
 131 # Check if the file for activated rulefiles is not empty.
 132 if(-f $snortusedrulefilesfile) {
 133         # Open the file for used rulefile and read-in content.
 134         open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
 135
 136         # Read-in content.
 137         my @lines = <FILE>;
 138
 139         # Close file.
 140         close(FILE);
 141
 142         # Loop through the array.
 143         foreach my $line (@lines) {
 144                 # Remove newlines.
 145                 chomp($line);
 146
 147                 # Skip comments.
 148                 next if ($line =~ /\#/);
 149
 150                 # Skip blank  lines.
 151                 next if ($line =~ /^\s*$/);
 152
 153                 # Gather rule sid and message from the ruleline.
 154                 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
 155                         my $rulefile = $1;
 156
 157                         # Add the rulefile to the %snortrules hash.
 158                         $snortrules{$rulefile}{'Rulefile'}{'State'} = "on";
 159                 }
 160         }
 161 }
 162
 163 # Save ruleset.
 164 if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
 165         my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
 166         my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
 167
 168         # Arrays to store sid which should be added to the corresponding files.
 169         my @enabled_sids;
 170         my @disabled_sids;
 171         my @enabled_rulefiles;
 172
 173         # Loop through the hash of snortrules.
 174         foreach my $rulefile(keys %snortrules) {
 175                 # Check if the rulefile is enabled.
 176                 if ($cgiparams{$rulefile} eq "on") {
 177                         # Add rulefile to the array of enabled rulefiles.
 178                         push(@enabled_rulefiles, $rulefile);
 179
 180                         # Drop item from cgiparams hash.
 181                         delete $cgiparams{$rulefile};
 182                 }
 183         }
 184
 185         # Loop through the hash of snortrules.
 186         foreach my $rulefile (keys %snortrules) {
 187                 # Loop through the single rules of the rulefile.
 188                 foreach my $sid (keys %{$snortrules{$rulefile}}) {
 189                         # Skip the current sid if it is not numeric.
 190                         next unless ($sid =~ /\d+/ );
 191
 192                         # Check if there exists a key in the cgiparams hash for this sid.
 193                         if (exists($cgiparams{$sid})) {
 194                                 # Look if the rule is disabled.
 195                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
 196                                         # Check if the state has been set to 'on'.
 197                                         if ($cgiparams{$sid} eq "on") {
 198                                                 # Add the sid to the enabled_sids array.
 199                                                 push(@enabled_sids, $sid);
 200
 201                                                 # Drop item from cgiparams hash.
 202                                                 delete $cgiparams{$rulefile}{$sid};
 203                                         }
 204                                 }
 205                         } else {
 206                                 # Look if the rule is enabled.
 207                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
 208                                         # Check if the state is 'on' and should be disabled.
 209                                         # In this case there is no entry
 210                                         # for the sid in the cgiparams hash.
 211                                         # Add it to the disabled_sids array.
 212                                         push(@disabled_sids, $sid);
 213
 214                                         # Drop item from cgiparams hash.
 215                                         delete $cgiparams{$rulefile}{$sid};
 216                                 }
 217                         }
 218                 }
 219         }
 220
 221         # Open enabled sid's file for writing.
 222         open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
 223
 224         # Write header to file.
 225         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 226
 227         # Check if the enabled_sids array contains any sid's.
 228         if (@enabled_sids) {
 229                 # Loop through the array of enabled sids and write them to the file.
 230                 foreach my $sid (@enabled_sids) {
 231                         print FILE "enablesid $sid\n";
 232                 }
 233         }
 234
 235         # Close file after writing.
 236         close(FILE);
 237
 238         # Open disabled sid's file for writing.
 239         open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
 240
 241         # Write header to file.
 242         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 243
 244         # Check if the enabled_sids array contains any sid's.
 245         if (@disabled_sids) {
 246                 # Loop through the array of disabled sids and write them to the file.
 247                 foreach my $sid (@disabled_sids) {
 248                         print FILE "disablesid $sid\n";
 249                 }
 250         }
 251
 252         # Close file after writing.
 253         close(FILE);
 254
 255         # Open file for used rulefiles.
 256         open (FILE, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
 257
 258         # Write header to file.
 259         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 260
 261         # Check if the enabled_rulefiles array contains any entries.
 262         if (@enabled_rulefiles) {
 263                 # Loop through the array of rulefiles which should be loaded and write the to the file.
 264                 foreach my $file (@enabled_rulefiles) {
 265                         print FILE "include \$RULE_PATH/$file\n";
 266                 }
 267         }
 268
 269         # Close file after writing.
 270         close(FILE);
 271
 272         # Call oinkmaster to alter the ruleset.
 273         &oinkmaster();
 274
 275 # Download new ruleset.
 276 } elsif ($cgiparams{'RULESET'} eq $Lang::tr{'download new ruleset'}) {
 277         # Check if the red device is active.
 278         unless (-e "${General::swroot}/red/active") {
 279                 $errormessage = $Lang::tr{'could not download latest updates'};
 280         }
 281
 282         # Call diskfree to gather the free disk space of /var.
 283         my @df = `/bin/df -B M /var`;
 284
 285         # Loop through the output.
 286         foreach my $line (@df) {
 287                 # Ignore header line.
 288                 next if $line =~ m/^Filesystem/;
 289
 290                 # Search for a line with the device information.
 291                 if ($line =~ m/dev/ ) {
 292                         # Split the line into single pieces.
 293                         my @values = split(' ', $line);
 294                         my ($filesystem, $blocks, $used, $available, $used_perenctage, $mounted_on) = @values;
 295
 296                         # Check if the available disk space is more than 300MB.
 297                         if ($available < 300) {
 298                                 # If there is not enough space, print out an error message.
 299                                 $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 300
 301                                 # Break loop.
 302                                 last;
 303                         }
 304                 }
 305         }
 306
 307         # Check if any errors happend.
 308         unless ($errormessage) {
 309                 # Call subfunction to download the ruleset.
 310                 $errormessage = &downloadruleset();
 311         }
 312
 313         # Sleep for 1 second
 314         sleep(1);
 315
 316         # Check if the downloader returend any error message.
 317         unless ($errormessage) {
 318                 # Call subfunction to launch oinkmaster.
 319                 &oinkmaster();
 320
 321                 # Sleep for 1 seconds.
 322                 sleep(1);
 323         }
 324 # Save snort settings.
 325 } elsif ($cgiparams{'SNORT'} eq $Lang::tr{'save'}) {
 326         # Prevent form name from been stored in conf file.
 327         delete $cgiparams{'SNORT'};
 328
 329         # Check if an oinkcode has been provided.
 330         if ($cgiparams{'OINKCODE'}) {
 331                 # Check if the oinkcode contains unallowed chars.
 332                 unless ($cgiparams{'OINKCODE'} =~ /^[a-z0-9]+$/) {
 333                         $errormessage = $Lang::tr{'invalid input for oink code'};
 334                 }
 335         }
 336
 337         # Go on if there are no error messages.
 338         if (!$errormessage) {
 339                 # Store settings into settings file.
 340                 &General::writehash("${General::swroot}/snort/settings", \%cgiparams);
 341
 342                 # Call snortctrl to restart snort
 343                 system('/usr/local/bin/snortctrl restart >/dev/null');
 344         }
 345 }
 346
 347 # Read-in snortsettings
 348 &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 349
 350 $checked{'ENABLE_SNORT'}{'off'} = '';
 351 $checked{'ENABLE_SNORT'}{'on'} = '';
 352 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 353 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 354 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 355 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 356 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 357 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 358 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 359 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 360 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 361 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 362 $selected{'RULES'}{'nothing'} = '';
 363 $selected{'RULES'}{'community'} = '';
 364 $selected{'RULES'}{'emerging'} = '';
 365 $selected{'RULES'}{'registered'} = '';
 366 $selected{'RULES'}{'subscripted'} = '';
 367 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 368
 369 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 370
 371 ### Java Script ###
 372 print <<END
 373 <script>
 374         // Tiny java script function to show/hide the rules
 375         // of a given category.
 376         function showhide(tblname) {
 377                 \$("#" + tblname).toggle();
 378         }
 379 </script>
 380 END
 381 ;
 382
 383 &Header::openbigbox('100%', 'left', '', $errormessage);
 384
 385 if ($errormessage) {
 386         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 387         print "<class name='base'>$errormessage\n";
 388         print "&nbsp;</class>\n";
 389         &Header::closebox();
 390 }
 391
 392 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 393
 394 my $rulesdate;
 395
 396 # Check if a ruleset allready has been downloaded.
 397 if ( -f "$rulestarball"){
 398         # Call stat on the filename to obtain detailed information.
 399         my @Info = stat("$rulestarball");
 400
 401         # Grab details about the creation time.
 402         $rulesdate = localtime($Info[9]);
 403 }
 404
 405 print <<END
 406 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 407         <table width='100%' border='0'>
 408                 <tr>
 409                         <td class='base' width='25%'>
 410                                 <input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'}>RED Snort
 411                         </td>
 412
 413                         <td class='base' width='25%'>
 414                                 <input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'}>GREEN Snort
 415                         </td>
 416
 417                         <td class='base' width='25%'>
 418 END
 419 ;
 420
 421 # Check if a blue device is configured.
 422 if ($netsettings{'BLUE_DEV'}) {
 423   print "<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />BLUE Snort\n";
 424 }
 425
 426 print "</td>\n";
 427
 428 print "<td width='25%'>\n";
 429
 430 # Check if an orange device is configured.
 431 if ($netsettings{'ORANGE_DEV'}) {
 432   print "<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />ORANGE Snort\n";
 433 }
 434
 435 print <<END
 436                         </td>
 437                 </tr>
 438
 439                 <tr>
 440                         <td colspan='4'><br><br></td>
 441                 </tr>
 442
 443                 <tr>
 444                         <td colspan='4'><b>$Lang::tr{'ids rules update'}</b></td>
 445                 </tr>
 446
 447                 <tr>
 448                         <td colspan='4'><select name='RULES'>
 449                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 450                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 451                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 452                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 453                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 454                         </select>
 455                         </td>
 456                 </tr>
 457
 458                 <tr>
 459                         <td colspan='4'>
 460                                 <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>
 461                                 <br>$Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}</br>
 462                         </td>
 463                 </tr>
 464
 465                 <tr>
 466                         <td colspan='4' nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}'></td>
 467                 </tr>
 468
 469                 <tr>
 470                         <td colspan='4' align='left'><br>
 471                                 <input type='submit' name='RULESET' value='$Lang::tr{'download new ruleset'}'>&nbsp;$Lang::tr{'updates installed'}: $rulesdate
 472                         </td>
 473
 474                 </tr>
 475         </table>
 476
 477         <br><br>
 478
 479         <table width='100%'>
 480                 <tr>
 481                         <td align='right'><input type='submit' name='SNORT' value='$Lang::tr{'save'}' /></td>
 482                 </tr>
 483         </table>
 484 </form>
 485 END
 486 ;
 487
 488 &Header::closebox();
 489
 490 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 491         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 492
 493         # Output display table for rule files
 494         print "<table width='100%'>\n";
 495
 496         # Local variable required for java script to show/hide
 497         # rules of a rulefile.
 498         my $rulesetcount = 1;
 499
 500         # Loop over each rule file
 501         foreach my $rulefile (sort keys(%snortrules)) {
 502                 my $rulechecked = '';
 503
 504                 # Check if rule file is enabled
 505                 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 506                         $rulechecked = 'CHECKED';
 507                 }
 508
 509                 # Table and rows for the rule files.
 510                 print"<tr>\n";
 511                 print"<td class='base' width='5%'>\n";
 512                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 513                 print"</td>\n";
 514                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 515                 print"<td class='base' width='5%' align='right'>\n";
 516                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 517                 print"</td>\n";
 518                 print"</tr>\n";
 519
 520                 # Rows which will be hidden per default and will contain the single rules.
 521                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 522                 print"<td colspan='3'>\n";
 523
 524                 # Local vars
 525                 my $lines;
 526                 my $rows;
 527                 my $col;
 528
 529                 # New table for the single rules.
 530                 print "<table width='100%'>\n";
 531
 532                 # Loop over rule file rules
 533                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 534                         # Local vars
 535                         my $ruledefchecked = '';
 536
 537                         # Skip rulefile itself.
 538                         next if ($sid eq "Rulefile");
 539
 540                         # If 2 rules have been displayed, start a new row
 541                         if (($lines % 2) == 0) {
 542                                 print "</tr><tr>\n";
 543
 544                                 # Increase rows by once.
 545                                 $rows++;
 546                         }
 547
 548                         # Colour lines.
 549                         if ($rows % 2) {
 550                                 $col="bgcolor='$color{'color20'}'";
 551                         } else {
 552                                 $col="bgcolor='$color{'color22'}'";
 553                         }
 554
 555                         # Set rule state
 556                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
 557                                 $ruledefchecked = 'CHECKED';
 558                         }
 559
 560                         # Create rule checkbox and display rule description
 561                         print "<td class='base' width='5%' align='right' $col>\n";
 562                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 563                         print "</td>\n";
 564                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 565
 566                         # Increment rule count
 567                         $lines++;
 568                 }
 569
 570                 # If do not have a second rule for row, create empty cell
 571                 if (($lines % 2) != 0) {
 572                         print "<td class='base'></td>";
 573                 }
 574
 575                 # Close display table
 576                 print "</tr></table></td></tr>";
 577
 578                 # Finished whith the rule file, increase count.
 579                 $rulesetcount++;
 580         }
 581
 582         # Close display table
 583         print "</table>";
 584
 585 print <<END
 586 <table width='100%'>
 587 <tr>
 588         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 589                 &nbsp; <!-- space for future online help link -->
 590         </td>
 591 </tr>
 592 </table>
 593 </form>
 594 END
 595 ;
 596 &Header::closebox();
 597 &Header::closebigbox();
 598 &Header::closepage();
 599
 600 sub working ($) {
 601         my $message = $_[0];
 602
 603         &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 604         &Header::openbigbox('100%', 'left', '', $errormessage);
 605         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1'>" );
 606         print <<END;
 607         <table>
 608                 <tr>
 609                         <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
 610                         <td>$message</td>
 611                 </tr>
 612                 <tr>
 613                         <td colspan='2' align='center'>
 614                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 615                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 616                         </form>
 617                 </tr>
 618         </table>
 619 END
 620         &Header::closebox();
 621         &Header::closebigbox();
 622         &Header::closepage();
 623         exit;
 624 }
 625
 626 sub downloadruleset {
 627         # Read proxysettings.
 628         my %proxysettings=();
 629         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 630
 631         # Load required perl module to handle the download.
 632         use LWP::UserAgent;
 633
 634         # Init the download module.
 635         my $downloader = LWP::UserAgent->new;
 636
 637         # Set timeout to 10 seconds.
 638         $downloader->timeout(10);
 639
 640         # Check if an upstream proxy is configured.
 641         if ($proxysettings{'UPSTREAM_PROXY'}) {
 642                 my ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 643                 my $proxy_url;
 644
 645                 # Check if we got a peer.
 646                 if ($peer) {
 647                         $proxy_url = "http://";
 648
 649                         # Check if the proxy requires authentication.
 650                         if (($proxysettings{'UPSTREAM_USER'}) && ($proxysettings{'UPSTREAM_PASSWORD'})) {
 651                                 $proxy_url .= "$proxysettings{'UPSTREAM_USER'}\:$proxysettings{'UPSTREAM_PASSWORD'}\@";
 652                         }
 653
 654                         # Add proxy server address and port.
 655                         $proxy_url .= "$peer\:$peerport";
 656                 } else {
 657                         # Break and return error message.
 658                         return "$Lang::tr{'could not download latest updates'}";
 659                 }
 660
 661                 # Setup proxy settings.
 662                 $downloader->proxy('http', $proxy_url);
 663         }
 664
 665         # Grab the right url based on the configured vendor.
 666         my $url = $rulesetsources{$snortsettings{'RULES'}};
 667
 668         # Check if the vendor requires an oinkcode and add it if needed.
 669         $url =~ s/\<oinkcode\>/$snortsettings{'OINKCODE'}/g;
 670
 671         # Abort if no url could be determined for the vendor.
 672         unless ($url) {
 673                 # Abort and return errormessage.
 674                 return "$Lang::tr{'could not download latest updates'}";
 675         }
 676
 677         # Pass the requested url to the downloader.
 678         my $request = HTTP::Request->new(GET => $url);
 679
 680         # Perform the request and save the output into the "$rulestarball" file.
 681         my $response = $downloader->request($request, $rulestarball);
 682
 683         # Check if there was any error.
 684         unless ($response->is_success) {
 685                 return "$response->status_line";
 686         }
 687
 688         # If we got here, everything worked fine. Return nothing.
 689         return;
 690 }
 691
 692 sub oinkmaster () {
 693         # Call oinkmaster to generate ruleset.
 694         system("/usr/local/bin/oinkmaster.pl -v -s -u file://$rulestarball -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules 2>&1 |logger -t oinkmaster");
 695 }
 696
 697 sub readrulesfile ($) {
 698         my $rulefile = shift;
 699
 700         # Open rule file and read in contents
 701         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 702
 703         # Store file content in an array.
 704         my @lines = <RULEFILE>;
 705
 706         # Close file.
 707         close(RULEFILE);
 708
 709         # Loop over rule file contents
 710         foreach my $line (@lines) {
 711                 # Remove whitespaces.
 712                 chomp $line;
 713
 714                 # Skip blank  lines.
 715                 next if ($line =~ /^\s*$/);
 716
 717                 # Local vars.
 718                 my $sid;
 719                 my $msg;
 720
 721                 # Gather rule sid and message from the ruleline.
 722                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 723                         $msg = $1;
 724                         $sid = $2;
 725
 726                         # Check if a rule has been found.
 727                         if ($sid && $msg) {
 728                                 # Add rule to the snortrules hash.
 729                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 730
 731                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 732                                 if ($line =~ /^\#/) {
 733                                         # If yes, the rule is disabled.
 734                                         $snortrules{$rulefile}{$sid}{'State'} = "off";
 735                                 } else {
 736                                         # Otherwise the rule is enabled.
 737                                         $snortrules{$rulefile}{$sid}{'State'} = "on";
 738                                 }
 739                         }
 740                 }
 741         }
 742 }