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 %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', $Lang::tr{'intrusion detection system'});
 393 print <<END
 394 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 395 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 396 END
 397 ;
 398 if ($netsettings{'BLUE_DEV'} ne '') {
 399   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 400 }
 401 if ($netsettings{'ORANGE_DEV'} ne '') {
 402   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 403 }
 404   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 405
 406 print <<END
 407 </td></tr>
 408 <tr>
 409         <td><br><br></td>
 410 </tr>
 411 <tr>
 412         <td><b>$Lang::tr{'ids rules update'}</b></td>
 413 </tr>
 414 <tr>
 415         <td><select name='RULES'>
 416                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 417                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 418                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 419                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 420                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 421                         </select>
 422         </td>
 423 </tr>
 424 <tr>
 425         <td><br />
 426                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 427                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 428         </td>
 429 </tr>
 430 <tr>
 431         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 432 </tr>
 433 <tr>
 434         <td width='30%' align='left'><br><input type='submit' name='RULESET' value='$Lang::tr{'download new ruleset'}' />
 435 END
 436 ;
 437 if ( -e "/var/tmp/snortrules.tar.gz"){
 438         my @Info = stat("/var/tmp/snortrules.tar.gz");
 439         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 440 }
 441 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 442
 443 print <<END
 444 </tr>
 445 </table>
 446 <br><br>
 447 <table width='100%'>
 448 <tr>
 449         <td align='right'><input type='submit' name='SNORT' value='$Lang::tr{'save'}' /></td>
 450 </tr>
 451 </table>
 452 </form>
 453 END
 454 ;
 455
 456 &Header::closebox();
 457
 458 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 459         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 460
 461         # Output display table for rule files
 462         print "<table width='100%'>\n";
 463
 464         # Local variable required for java script to show/hide
 465         # rules of a rulefile.
 466         my $rulesetcount = 1;
 467
 468         # Loop over each rule file
 469         foreach my $rulefile (sort keys(%snortrules)) {
 470                 my $rulechecked = '';
 471
 472                 # Check if rule file is enabled
 473                 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 474                         $rulechecked = 'CHECKED';
 475                 }
 476
 477                 # Table and rows for the rule files.
 478                 print"<tr>\n";
 479                 print"<td class='base' width='5%'>\n";
 480                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 481                 print"</td>\n";
 482                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 483                 print"<td class='base' width='5%' align='right'>\n";
 484                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 485                 print"</td>\n";
 486                 print"</tr>\n";
 487
 488                 # Rows which will be hidden per default and will contain the single rules.
 489                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 490                 print"<td colspan='3'>\n";
 491
 492                 # Local vars
 493                 my $lines;
 494                 my $rows;
 495                 my $col;
 496
 497                 # New table for the single rules.
 498                 print "<table width='100%'>\n";
 499
 500                 # Loop over rule file rules
 501                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 502                         # Local vars
 503                         my $ruledefchecked = '';
 504
 505                         # Skip rulefile itself.
 506                         next if ($sid eq "Rulefile");
 507
 508                         # If 2 rules have been displayed, start a new row
 509                         if (($lines % 2) == 0) {
 510                                 print "</tr><tr>\n";
 511
 512                                 # Increase rows by once.
 513                                 $rows++;
 514                         }
 515
 516                         # Colour lines.
 517                         if ($rows % 2) {
 518                                 $col="bgcolor='$color{'color20'}'";
 519                         } else {
 520                                 $col="bgcolor='$color{'color22'}'";
 521                         }
 522
 523                         # Set rule state
 524                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
 525                                 $ruledefchecked = 'CHECKED';
 526                         }
 527
 528                         # Create rule checkbox and display rule description
 529                         print "<td class='base' width='5%' align='right' $col>\n";
 530                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 531                         print "</td>\n";
 532                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 533
 534                         # Increment rule count
 535                         $lines++;
 536                 }
 537
 538                 # If do not have a second rule for row, create empty cell
 539                 if (($lines % 2) != 0) {
 540                         print "<td class='base'></td>";
 541                 }
 542
 543                 # Close display table
 544                 print "</tr></table></td></tr>";
 545
 546                 # Finished whith the rule file, increase count.
 547                 $rulesetcount++;
 548         }
 549
 550         # Close display table
 551         print "</table>";
 552
 553 print <<END
 554 <table width='100%'>
 555 <tr>
 556         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 557                 &nbsp; <!-- space for future online help link -->
 558         </td>
 559 </tr>
 560 </table>
 561 </form>
 562 END
 563 ;
 564 &Header::closebox();
 565 &Header::closebigbox();
 566 &Header::closepage();
 567
 568 sub working ($) {
 569         my $message = $_[0];
 570
 571         &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 572         &Header::openbigbox('100%', 'left', '', $errormessage);
 573         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1'>" );
 574         print <<END;
 575         <table>
 576                 <tr>
 577                         <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
 578                         <td>$message</td>
 579                 </tr>
 580                 <tr>
 581                         <td colspan='2' align='center'>
 582                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 583                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 584                         </form>
 585                 </tr>
 586         </table>
 587 END
 588         &Header::closebox();
 589         &Header::closebigbox();
 590         &Header::closepage();
 591         exit;
 592 }
 593
 594 sub downloadruleset {
 595         # Read proxysettings.
 596         my %proxysettings=();
 597         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 598
 599         # Load required perl module to handle the download.
 600         use LWP::UserAgent;
 601
 602         # Init the download module.
 603         my $downloader = LWP::UserAgent->new;
 604
 605         # Set timeout to 10 seconds.
 606         $downloader->timeout(10);
 607
 608         # Check if an upstream proxy is configured.
 609         if ($proxysettings{'UPSTREAM_PROXY'}) {
 610                 my ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 611                 my $proxy_url;
 612
 613                 # Check if we got a peer.
 614                 if ($peer) {
 615                         $proxy_url = "http://";
 616
 617                         # Check if the proxy requires authentication.
 618                         if (($proxysettings{'UPSTREAM_USER'}) && ($proxysettings{'UPSTREAM_PASSWORD'})) {
 619                                 $proxy_url .= "$proxysettings{'UPSTREAM_USER'}\:$proxysettings{'UPSTREAM_PASSWORD'}\@";
 620                         }
 621
 622                         # Add proxy server address and port.
 623                         $proxy_url .= "$peer\:$peerport";
 624                 } else {
 625                         # Break and return error message.
 626                         return "$Lang::tr{'could not download latest updates'}";
 627                 }
 628
 629                 # Setup proxy settings.
 630                 $downloader->proxy('http', $proxy_url);
 631         }
 632
 633         # Grab the right url based on the configured vendor.
 634         my $url = $rulesetsources{$snortsettings{'RULES'}};
 635
 636         # Check if the vendor requires an oinkcode and add it if needed.
 637         $url =~ s/\<oinkcode\>/$snortsettings{'OINKCODE'}/g;
 638
 639         # Abort if no url could be determined for the vendor.
 640         unless ($url) {
 641                 # Abort and return errormessage.
 642                 return "$Lang::tr{'could not download latest updates'}";
 643         }
 644
 645         # Pass the requested url to the downloader.
 646         my $request = HTTP::Request->new(GET => $url);
 647
 648         # Perform the request and save the output into the "$rulestarball" file.
 649         my $response = $downloader->request($request, $rulestarball);
 650
 651         # Check if there was any error.
 652         unless ($response->is_success) {
 653                 return "$response->status_line";
 654         }
 655
 656         # If we got here, everything worked fine. Return nothing.
 657         return;
 658 }
 659
 660 sub oinkmaster () {
 661         # Call oinkmaster to generate ruleset.
 662         system("/usr/local/bin/oinkmaster.pl -v -s -u file://$rulestarball -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules 2>&1 |logger -t oinkmaster");
 663 }
 664
 665 sub readrulesfile ($) {
 666         my $rulefile = shift;
 667
 668         # Open rule file and read in contents
 669         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 670
 671         # Store file content in an array.
 672         my @lines = <RULEFILE>;
 673
 674         # Close file.
 675         close(RULEFILE);
 676
 677         # Loop over rule file contents
 678         foreach my $line (@lines) {
 679                 # Remove whitespaces.
 680                 chomp $line;
 681
 682                 # Skip blank  lines.
 683                 next if ($line =~ /^\s*$/);
 684
 685                 # Local vars.
 686                 my $sid;
 687                 my $msg;
 688
 689                 # Gather rule sid and message from the ruleline.
 690                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 691                         $msg = $1;
 692                         $sid = $2;
 693
 694                         # Check if a rule has been found.
 695                         if ($sid && $msg) {
 696                                 # Add rule to the snortrules hash.
 697                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 698
 699                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 700                                 if ($line =~ /^\#/) {
 701                                         # If yes, the rule is disabled.
 702                                         $snortrules{$rulefile}{$sid}{'State'} = "off";
 703                                 } else {
 704                                         # Otherwise the rule is enabled.
 705                                         $snortrules{$rulefile}{$sid}{'State'} = "on";
 706                                 }
 707                         }
 708                 }
 709         }
 710 }