mirror of
https://github.com/vincentmli/bpfire.git
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656 lines
19 KiB
Perl
656 lines
19 KiB
Perl
#!/usr/bin/perl
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###############################################################################
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# #
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# IPFire.org - A linux based firewall #
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# Copyright (C) 2007-2018 IPFire Team <info@ipfire.org> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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###############################################################################
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use strict;
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# enable only the following on debugging purpose
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#use warnings;
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#use CGI::Carp 'fatalsToBrowser';
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require '/var/ipfire/general-functions.pl';
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require "${General::swroot}/lang.pl";
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require "${General::swroot}/header.pl";
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require "${General::swroot}/ids-functions.pl";
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my %color = ();
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my %mainsettings = ();
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my %netsettings = ();
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my %idsrules = ();
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my %snortsettings=();
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my %rulesetsources = ();
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my %cgiparams=();
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my %checked=();
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my %selected=();
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# Read-in main settings, for language, theme and colors.
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&General::readhash("${General::swroot}/main/settings", \%mainsettings);
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&General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
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# Get netsettings.
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&General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
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my $snortrulepath = "/etc/snort/rules";
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my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
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my $errormessage;
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&Header::showhttpheaders();
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# Default settings for snort.
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$snortsettings{'ENABLE_SNORT'} = 'off';
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$snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
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$snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
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$snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
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$snortsettings{'RULES'} = '';
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$snortsettings{'OINKCODE'} = '';
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#Get GUI values
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&Header::getcgihash(\%cgiparams);
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# Check if any error has been stored.
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if (-e $IDS::storederrorfile) {
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# Open file to read in the stored error message.
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open(FILE, "<$IDS::storederrorfile") or die "Could not open $IDS::storederrorfile. $!\n";
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# Read the stored error message.
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$errormessage = <FILE>;
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# Close file.
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close (FILE);
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# Delete the file, which is now not longer required.
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unlink($IDS::storederrorfile);
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}
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## Grab all available snort rules and store them in the idsrules hash.
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#
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# Open snort rules directory and do a directory listing.
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opendir(DIR, $snortrulepath) or die $!;
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# Loop through the direcory.
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while (my $file = readdir(DIR)) {
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# We only want files.
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next unless (-f "$snortrulepath/$file");
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# Ignore empty files.
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next if (-z "$snortrulepath/$file");
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# Use a regular expression to find files ending in .rules
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next unless ($file =~ m/\.rules$/);
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# Ignore files which are not read-able.
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next unless (-R "$snortrulepath/$file");
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# Call subfunction to read-in rulefile and add rules to
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# the idsrules hash.
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&readrulesfile("$file");
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}
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closedir(DIR);
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# Gather used rulefiles.
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#
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# Check if the file for activated rulefiles is not empty.
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if(-f $snortusedrulefilesfile) {
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# Open the file for used rulefile and read-in content.
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open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
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# Read-in content.
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my @lines = <FILE>;
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# Close file.
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close(FILE);
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# Loop through the array.
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foreach my $line (@lines) {
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# Remove newlines.
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chomp($line);
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# Skip comments.
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next if ($line =~ /\#/);
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# Skip blank lines.
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next if ($line =~ /^\s*$/);
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# Gather rule sid and message from the ruleline.
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if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
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my $rulefile = $1;
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# Add the rulefile to the %idsrules hash.
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$idsrules{$rulefile}{'Rulefile'}{'State'} = "on";
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}
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}
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}
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# Save ruleset.
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if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
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my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
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my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
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# Arrays to store sid which should be added to the corresponding files.
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my @enabled_sids;
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my @disabled_sids;
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my @enabled_rulefiles;
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# Loop through the hash of idsrules.
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foreach my $rulefile(keys %idsrules) {
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# Check if the rulefile is enabled.
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if ($cgiparams{$rulefile} eq "on") {
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# Add rulefile to the array of enabled rulefiles.
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push(@enabled_rulefiles, $rulefile);
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# Drop item from cgiparams hash.
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delete $cgiparams{$rulefile};
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}
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}
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# Loop through the hash of idsrules.
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foreach my $rulefile (keys %idsrules) {
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# Loop through the single rules of the rulefile.
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foreach my $sid (keys %{$idsrules{$rulefile}}) {
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# Skip the current sid if it is not numeric.
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next unless ($sid =~ /\d+/ );
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# Check if there exists a key in the cgiparams hash for this sid.
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if (exists($cgiparams{$sid})) {
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# Look if the rule is disabled.
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if ($idsrules{$rulefile}{$sid}{'State'} eq "off") {
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# Check if the state has been set to 'on'.
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if ($cgiparams{$sid} eq "on") {
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# Add the sid to the enabled_sids array.
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push(@enabled_sids, $sid);
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# Drop item from cgiparams hash.
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delete $cgiparams{$rulefile}{$sid};
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}
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}
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} else {
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# Look if the rule is enabled.
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if ($idsrules{$rulefile}{$sid}{'State'} eq "on") {
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# Check if the state is 'on' and should be disabled.
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# In this case there is no entry
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# for the sid in the cgiparams hash.
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# Add it to the disabled_sids array.
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push(@disabled_sids, $sid);
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# Drop item from cgiparams hash.
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delete $cgiparams{$rulefile}{$sid};
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}
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}
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}
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}
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# Open enabled sid's file for writing.
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open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
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# Write header to file.
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print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
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# Check if the enabled_sids array contains any sid's.
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if (@enabled_sids) {
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# Loop through the array of enabled sids and write them to the file.
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foreach my $sid (@enabled_sids) {
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print FILE "enablesid $sid\n";
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}
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}
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# Close file after writing.
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close(FILE);
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# Open disabled sid's file for writing.
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open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
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# Write header to file.
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print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
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# Check if the enabled_sids array contains any sid's.
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if (@disabled_sids) {
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# Loop through the array of disabled sids and write them to the file.
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foreach my $sid (@disabled_sids) {
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print FILE "disablesid $sid\n";
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}
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}
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# Close file after writing.
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close(FILE);
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# Open file for used rulefiles.
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open (FILE, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
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# Write header to file.
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print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
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# Check if the enabled_rulefiles array contains any entries.
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if (@enabled_rulefiles) {
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# Loop through the array of rulefiles which should be loaded and write the to the file.
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foreach my $file (@enabled_rulefiles) {
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print FILE "include \$RULE_PATH/$file\n";
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}
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}
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# Close file after writing.
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close(FILE);
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# Lock the webpage and print message.
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&working_notice("$Lang::tr{'snort working'}");
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# Call oinkmaster to alter the ruleset.
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&IDS::oinkmaster();
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# Reload page.
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&reload();
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# Download new ruleset.
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} elsif ($cgiparams{'RULESET'} eq $Lang::tr{'download new ruleset'}) {
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# Check if the red device is active.
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unless (-e "${General::swroot}/red/active") {
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$errormessage = $Lang::tr{'could not download latest updates'};
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}
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# Check if enought free disk space is availabe.
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$errormessage = &IDS::checkdiskspace();
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# Check if any errors happend.
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unless ($errormessage) {
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# Lock the webpage and print notice about downloading
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# a new ruleset.
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&working_notice("$Lang::tr{'snort working'}");
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# Call subfunction to download the ruleset.
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$errormessage = &IDS::downloadruleset();
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# Check if the downloader returned an error.
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if ($errormessage) {
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# Call function to store the errormessage.
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&IDS::log_error($errormessage);
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# Preform a reload of the page.
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&reload();
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} else {
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# Call subfunction to launch oinkmaster.
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&IDS::oinkmaster();
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# Perform a reload of the page.
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&reload();
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}
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}
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# Save snort settings.
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} elsif ($cgiparams{'SNORT'} eq $Lang::tr{'save'}) {
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# Prevent form name from been stored in conf file.
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delete $cgiparams{'SNORT'};
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# Check if an oinkcode has been provided.
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if ($cgiparams{'OINKCODE'}) {
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# Check if the oinkcode contains unallowed chars.
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unless ($cgiparams{'OINKCODE'} =~ /^[a-z0-9]+$/) {
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$errormessage = $Lang::tr{'invalid input for oink code'};
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}
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}
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# Go on if there are no error messages.
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if (!$errormessage) {
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# Store settings into settings file.
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&General::writehash("${General::swroot}/snort/settings", \%cgiparams);
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# Call snortctrl to restart snort
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system('/usr/local/bin/snortctrl restart >/dev/null');
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}
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}
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# Read-in snortsettings
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&General::readhash("${General::swroot}/snort/settings", \%snortsettings);
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$checked{'ENABLE_SNORT'}{'off'} = '';
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$checked{'ENABLE_SNORT'}{'on'} = '';
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$checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
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$checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
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$checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
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$checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
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$checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
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$checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
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$checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
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$checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
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$checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
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$checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
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$selected{'RULES'}{'nothing'} = '';
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$selected{'RULES'}{'community'} = '';
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$selected{'RULES'}{'emerging'} = '';
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$selected{'RULES'}{'registered'} = '';
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$selected{'RULES'}{'subscripted'} = '';
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$selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
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&Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
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### Java Script ###
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print <<END
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<script>
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// Tiny java script function to show/hide the rules
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// of a given category.
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function showhide(tblname) {
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\$("#" + tblname).toggle();
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}
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</script>
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END
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;
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&Header::openbigbox('100%', 'left', '', $errormessage);
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if ($errormessage) {
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&Header::openbox('100%', 'left', $Lang::tr{'error messages'});
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print "<class name='base'>$errormessage\n";
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print " </class>\n";
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&Header::closebox();
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}
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&Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
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my $rulesdate;
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# Check if a ruleset allready has been downloaded.
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if ( -f "$IDS::rulestarball"){
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# Call stat on the filename to obtain detailed information.
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my @Info = stat("$IDS::rulestarball");
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# Grab details about the creation time.
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$rulesdate = localtime($Info[9]);
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}
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print <<END
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<form method='post' action='$ENV{'SCRIPT_NAME'}'>
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<table width='100%' border='0'>
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<tr>
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<td class='base' width='25%'>
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<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'}>RED Snort
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</td>
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<td class='base' width='25%'>
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<input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'}>GREEN Snort
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</td>
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<td class='base' width='25%'>
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END
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;
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# Check if a blue device is configured.
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if ($netsettings{'BLUE_DEV'}) {
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print "<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />BLUE Snort\n";
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}
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print "</td>\n";
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print "<td width='25%'>\n";
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# Check if an orange device is configured.
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if ($netsettings{'ORANGE_DEV'}) {
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print "<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />ORANGE Snort\n";
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}
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print <<END
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</td>
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</tr>
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<tr>
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<td colspan='4'><br><br></td>
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</tr>
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<tr>
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<td colspan='4'><b>$Lang::tr{'ids rules update'}</b></td>
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</tr>
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<tr>
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<td colspan='4'><select name='RULES'>
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<option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
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<option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
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<option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
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<option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
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<option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
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</select>
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</td>
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</tr>
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<tr>
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<td colspan='4'>
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<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>
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<br>$Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}</br>
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</td>
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</tr>
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<tr>
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<td colspan='4' nowrap='nowrap'>Oinkcode: <input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}'></td>
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</tr>
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<tr>
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<td colspan='4' align='left'><br>
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<input type='submit' name='RULESET' value='$Lang::tr{'download new ruleset'}'> $Lang::tr{'updates installed'}: $rulesdate
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</td>
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</tr>
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</table>
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<br><br>
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<table width='100%'>
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<tr>
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<td align='right'><input type='submit' name='SNORT' value='$Lang::tr{'save'}' /></td>
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</tr>
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</table>
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</form>
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END
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;
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&Header::closebox();
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&Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
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print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
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# Output display table for rule files
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print "<table width='100%'>\n";
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# Local variable required for java script to show/hide
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# rules of a rulefile.
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my $rulesetcount = 1;
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# Loop over each rule file
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foreach my $rulefile (sort keys(%idsrules)) {
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my $rulechecked = '';
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# Check if rule file is enabled
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if ($idsrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
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$rulechecked = 'CHECKED';
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}
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# Table and rows for the rule files.
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print"<tr>\n";
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print"<td class='base' width='5%'>\n";
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print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
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print"</td>\n";
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print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
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print"<td class='base' width='5%' align='right'>\n";
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print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
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print"</td>\n";
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print"</tr>\n";
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# Rows which will be hidden per default and will contain the single rules.
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print"<tr style='display:none' id='ruleset$rulesetcount'>\n";
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print"<td colspan='3'>\n";
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# Local vars
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my $lines;
|
|
my $rows;
|
|
my $col;
|
|
|
|
# New table for the single rules.
|
|
print "<table width='100%'>\n";
|
|
|
|
# Loop over rule file rules
|
|
foreach my $sid (sort {$a <=> $b} keys(%{$idsrules{$rulefile}})) {
|
|
# Local vars
|
|
my $ruledefchecked = '';
|
|
|
|
# Skip rulefile itself.
|
|
next if ($sid eq "Rulefile");
|
|
|
|
# If 2 rules have been displayed, start a new row
|
|
if (($lines % 2) == 0) {
|
|
print "</tr><tr>\n";
|
|
|
|
# Increase rows by once.
|
|
$rows++;
|
|
}
|
|
|
|
# Colour lines.
|
|
if ($rows % 2) {
|
|
$col="bgcolor='$color{'color20'}'";
|
|
} else {
|
|
$col="bgcolor='$color{'color22'}'";
|
|
}
|
|
|
|
# Set rule state
|
|
if ($idsrules{$rulefile}{$sid}{'State'} eq 'on') {
|
|
$ruledefchecked = 'CHECKED';
|
|
}
|
|
|
|
# Create rule checkbox and display rule description
|
|
print "<td class='base' width='5%' align='right' $col>\n";
|
|
print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
|
|
print "</td>\n";
|
|
print "<td class='base' width='45%' $col>$idsrules{$rulefile}{$sid}{'Description'}</td>";
|
|
|
|
# Increment rule count
|
|
$lines++;
|
|
}
|
|
|
|
# If do not have a second rule for row, create empty cell
|
|
if (($lines % 2) != 0) {
|
|
print "<td class='base'></td>";
|
|
}
|
|
|
|
# Close display table
|
|
print "</tr></table></td></tr>";
|
|
|
|
# Finished whith the rule file, increase count.
|
|
$rulesetcount++;
|
|
}
|
|
|
|
# Close display table
|
|
print "</table>";
|
|
|
|
print <<END
|
|
<table width='100%'>
|
|
<tr>
|
|
<td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
|
|
<!-- space for future online help link -->
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</form>
|
|
END
|
|
;
|
|
&Header::closebox();
|
|
&Header::closebigbox();
|
|
&Header::closepage();
|
|
|
|
#
|
|
## A function to display a notice, to lock the webpage and
|
|
## tell the user which action currently will be performed.
|
|
#
|
|
sub working_notice ($) {
|
|
my ($message) = @_;
|
|
|
|
&Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
|
|
&Header::openbigbox('100%', 'left', '', $errormessage);
|
|
&Header::openbox( 'Waiting', 1,);
|
|
print <<END;
|
|
<table>
|
|
<tr>
|
|
<td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
|
|
<td>$message</td>
|
|
</tr>
|
|
</table>
|
|
END
|
|
&Header::closebox();
|
|
&Header::closebigbox();
|
|
&Header::closepage();
|
|
}
|
|
|
|
#
|
|
## A tiny function to perform a reload of the webpage after one second.
|
|
#
|
|
sub reload () {
|
|
print "<meta http-equiv='refresh' content='1'>\n";
|
|
|
|
# Stop the script.
|
|
exit;
|
|
}
|
|
|
|
#
|
|
## Private function to read-in and parse rules of a given rulefile.
|
|
#
|
|
## The given file will be read, parsed and all valid rules will be stored by ID,
|
|
## message/description and it's state in the idsrules hash.
|
|
#
|
|
sub readrulesfile ($) {
|
|
my $rulefile = shift;
|
|
|
|
# Open rule file and read in contents
|
|
open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
|
|
|
|
# Store file content in an array.
|
|
my @lines = <RULEFILE>;
|
|
|
|
# Close file.
|
|
close(RULEFILE);
|
|
|
|
# Loop over rule file contents
|
|
foreach my $line (@lines) {
|
|
# Remove whitespaces.
|
|
chomp $line;
|
|
|
|
# Skip blank lines.
|
|
next if ($line =~ /^\s*$/);
|
|
|
|
# Local vars.
|
|
my $sid;
|
|
my $msg;
|
|
|
|
# Gather rule sid and message from the ruleline.
|
|
if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
|
|
$msg = $1;
|
|
$sid = $2;
|
|
|
|
# Check if a rule has been found.
|
|
if ($sid && $msg) {
|
|
# Add rule to the idsrules hash.
|
|
$idsrules{$rulefile}{$sid}{'Description'} = $msg;
|
|
|
|
# Grab status of the rule. Check if ruleline starts with a "dash".
|
|
if ($line =~ /^\#/) {
|
|
# If yes, the rule is disabled.
|
|
$idsrules{$rulefile}{$sid}{'State'} = "off";
|
|
} else {
|
|
# Otherwise the rule is enabled.
|
|
$idsrules{$rulefile}{$sid}{'State'} = "on";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|