require '/var/ipfire/general-functions.pl';
require "${General::swroot}/network-functions.pl";
-require "${General::swroot}/suricata/ruleset-sources";
+require "${General::swroot}/suricata/ruleset-sources-new";
# Location where all config and settings files are stored.
our $settingsdir = "${General::swroot}/suricata";
-# File where the used rulefiles are stored.
+# File where the main file for providers ruleset inclusion exists.
+our $suricata_used_providers_file = "$settingsdir/suricata-used-providers.yaml";
+
+# DEPRECATED - File where the used rulefiles are stored.
our $used_rulefiles_file = "$settingsdir/suricata-used-rulefiles.yaml";
# File where the addresses of the homenet are stored.
unless (-f "$enabled_sids_file") { &create_empty_file($enabled_sids_file); }
unless (-f "$disabled_sids_file") { &create_empty_file($disabled_sids_file); }
unless (-f "$modify_sids_file") { &create_empty_file($modify_sids_file); }
- unless (-f "$used_rulefiles_file") { &create_empty_file($used_rulefiles_file); }
+ unless (-f "$suricata_used_providers_file") { &create_empty_file($suricata_used_providers_file); }
unless (-f "$ids_settings_file") { &create_empty_file($ids_settings_file); }
unless (-f "$providers_settings_file") { &create_empty_file($providers_settings_file); }
unless (-f "$ignored_file") { &create_empty_file($ignored_file); }
return sort(@providers);
}
+#
+## Function to get a list of all enabled ruleset providers.
+##
+## They will be returned as an array.
+#
+sub get_enabled_providers () {
+ my %used_providers = ();
+
+ # Array to store the enabled providers.
+ my @enabled_providers = ();
+
+ # Read-in the providers config file.
+ &General::readhasharray("$providers_settings_file", \%used_providers);
+
+ # Loop through the hash of used_providers.
+ foreach my $id (keys %used_providers) {
+ # Skip disabled providers.
+ next unless ($used_providers{$id}[3] eq "enabled");
+
+ # Grab the provider handle.
+ my $provider = "$used_providers{$id}[0]";
+
+ # Add the provider to the array of enabled providers.
+ push(@enabled_providers, $provider);
+ }
+
+ # Return the array.
+ return @enabled_providers;
+}
+
#
## Function for checking if at least 300MB of free disk space are available
## on the "/var" partition.
# Load perl module for file copying.
use File::Copy;
- # Hash to store the used providers.
- my %used_providers = ();
-
- # Array to store the enabled providers.
- my @enabled_providers = ();
-
# Check if the files in rulesdir have the correct permissions.
&_check_rulesdir_permissions();
# Cleanup the rules directory before filling it with the new rulests.
&_cleanup_rulesdir();
- # Read-in the providers config file.
- &General::readhasharray("$providers_settings_file", \%used_providers);
-
- # Loop through the hash of used_providers.
- foreach my $id (keys %used_providers) {
- # Skip disabled providers.
- next unless ($used_providers{$id}[3] eq "enabled");
-
- # Grab the provider handle.
- my $provider = "$used_providers{$id}[0]";
-
- # Add the provider handle to the array of enabled providers.
- push(@enabled_providers, $provider);
+ # Get all enabled providers.
+ my @enabled_providers = &get_enabled_providers();
+ # Loop through the array of enabled providers.
+ foreach my $provider (@enabled_providers) {
# Omit the type (dl_type) of the stored ruleset.
my $type = $IDS::Ruleset::Providers{$provider}{'dl_type'};
# Close the log handle.
closelog();
- use Data::Dumper;
-
- print Dumper \@enabled_providers;
-
# Call function to merge the classification files.
&merge_classifications(@enabled_providers);
&merge_sid_msg(@enabled_providers);
# Cleanup temporary directory.
- # XXX - not implemented yet.
- # &cleanup_tmp_directory();
+ &cleanup_tmp_directory();
}
#
close(FILE);
}
+#
+## A very tiny function to move an extracted ruleset from the temporary directory into
+## the rules directory.
+#
+sub move_tmp_ruleset() {
+ # Load perl module.
+ use File::Copy;
+
+ # Do a directory listing of the temporary directory.
+ opendir DH, $tmp_rules_directory;
+
+ # Loop over all files.
+ while(my $file = readdir DH) {
+ # Move them to the rules directory.
+ move "$tmp_rules_directory/$file" , "$rulespath/$file";
+ }
+
+ # Close directory handle.
+ closedir DH;
+}
+
+#
+## Function to cleanup the temporary IDS directroy.
+#
+sub cleanup_tmp_directory () {
+ # Load rmtree() function from file path perl module.
+ use File::Path 'rmtree';
+
+ # Delete temporary directory and all containing files.
+ rmtree([ "$tmp_directory" ]);
+}
+
#
## Function to do all the logging stuff if the downloading or updating of the ruleset fails.
#
return $rulesfile;
}
+#
+## Tiny function to delete the stored ruleset file or tarball for a given provider.
+#
+sub drop_dl_rulesfile ($) {
+ my ($provider) = @_;
+
+ # Gather the full path and name of the stored rulesfile.
+ my $rulesfile = &_get_dl_rulesfile($provider);
+
+ # Check if the given rulesfile exists.
+ if (-f $rulesfile) {
+ # Delete the stored rulesfile.
+ unlink($rulesfile) or die "Could not delete $rulesfile. $!\n";
+ }
+}
+
#
## Function to check if the IDS is running.
#
# We only want files.
next unless (-f "$rulespath/$file");
- # Skip element if it has config as file extension.
- next if ($file =~ m/\.config$/);
-
# Skip rules file for whitelisted hosts.
next if ("$rulespath/$file" eq $whitelist_file);
}
#
-## Function to generate and write the file for used rulefiles.
+## Function to generate and write the file for used rulefiles file for a given provider.
+##
+## The function requires as first argument a provider handle, and as second an array with files.
#
-sub write_used_rulefiles_file(@) {
- my @files = @_;
+sub write_used_provider_rulefiles_file($@) {
+ my ($provider, @files) = @_;
+
+ # Get the path and file for the provider specific used rulefiles file.
+ my $used_provider_rulesfile_file = &get_used_provider_rulesfile_file($provider);
# Open file for used rulefiles.
- open (FILE, ">$used_rulefiles_file") or die "Could not write to $used_rulefiles_file. $!\n";
+ open (FILE, ">$used_provider_rulesfile_file") or die "Could not write to $used_provider_rulesfile_file. $!\n";
# Write yaml header to the file.
print FILE "%YAML 1.1\n";
# Write header to file.
print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
- # Allways use the whitelist.
- print FILE " - whitelist.rules\n";
-
# Loop through the array of given files.
foreach my $file (@files) {
# Check if the given filename exists and write it to the file of used rulefiles.
close(FILE);
}
+#
+## Function to write the main file for provider rulesfiles inclusions.
+##
+## This function requires an array of provider handles.
+#
+sub write_main_used_rulefiles_file (@) {
+ my (@providers) = @_;
+
+ # Open file for used rulefils inclusion.
+ open (FILE, ">", "$suricata_used_providers_file") or die "Could not write to $suricata_used_providers_file. $!\n";
+
+ # Write yaml header to the file.
+ print FILE "%YAML 1.1\n";
+ print FILE "---\n\n";
+
+ # Write header to file.
+ print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
+
+ # Loop through the list of given providers.
+ foreach my $provider (@providers) {
+ # Call function to get the providers used rulefiles file.
+ my $filename = &get_used_provider_rulesfile_file($provider);
+
+ # Print the provider to the file.
+ print FILE "include\: $filename\n";
+ }
+
+ # XXX - whitelist.rules is not allowed directly, needs to be in a yaml file which has to be included.
+ # Always use the whitelist file.
+ #print FILE "\n - whitelist.rules\n";
+
+ # Close the filehandle after writing.
+ close(FILE);
+}
+
+#
+## Tiny function to generate the full path and name for the used_provider_rulesfile file of a given provider.
+#
+sub get_used_provider_rulesfile_file ($) {
+ my ($provider) = @_;
+
+ my $filename = "$settingsdir/suricata\-$provider\-used\-rulefiles.yaml";
+
+ # Return the gernerated file.
+ return $filename;
+}
+
#
## Function to generate and write the file for modify the ruleset.
#
sub write_modify_sids_file() {
# Get configured settings.
my %idssettings=();
- my %rulessettings=();
&General::readhash("$ids_settings_file", \%idssettings);
- &General::readhash("$rules_settings_file", \%rulessettings);
-
- # Gather the configured ruleset.
- my $ruleset = $rulessettings{'RULES'};
# Open modify sid's file for writing.
open(FILE, ">$modify_sids_file") or die "Could not write to $modify_sids_file. $!\n";
# malware in that file. Rules which fall into the first category should stay as
# alert since not all flows of that type contain malware.
- if($ruleset eq 'registered' or $ruleset eq 'subscripted' or $ruleset eq 'community') {
- # These types of rulesfiles contain meta-data which gives the action that should
- # be used when in IPS mode. Do the following:
- #
- # 1. Disable all rules and set the action to 'drop'
- # 2. Set the action back to 'alert' if the rule contains 'flowbits:noalert;'
- # This should give rules not in the policy a reasonable default if the user
- # manually enables them.
- # 3. Enable rules and set actions according to the meta-data strings.
+ # These types of rulesfiles contain meta-data which gives the action that should
+ # be used when in IPS mode. Do the following:
+ #
+ # 1. Disable all rules and set the action to 'drop'
+ # 2. Set the action back to 'alert' if the rule contains 'flowbits:noalert;'
+ # This should give rules not in the policy a reasonable default if the user
+ # manually enables them.
+ # 3. Enable rules and set actions according to the meta-data strings.
- my $policy = 'balanced'; # Placeholder to allow policy to be changed.
+ my $policy = 'balanced'; # Placeholder to allow policy to be changed.
print FILE <<END;
-modifysid * "^#?(?:alert|drop)" | "#drop"
-modifysid * "^#drop(.+flowbits:noalert;)" | "#alert\${1}"
modifysid * "^#(?:alert|drop)(.+policy $policy-ips alert)" | "alert\${1}"
modifysid * "^#(?:alert|drop)(.+policy $policy-ips drop)" | "drop\${1}"
-END
- } else {
- # These rulefiles don't have the metadata, so set rules to 'drop' unless they
- # contain the string 'flowbits:noalert;'.
- print FILE <<END;
modifysid * "^(#?)(?:alert|drop)" | "\${1}drop"
modifysid * "^(#?)drop(.+flowbits:noalert;)" | "\${1}alert\${2}"
END
}
- }
# Close file handle.
close(FILE);
return;
}
+#
+## Function to get the used rules files of a given provider.
+#
+sub read_used_provider_rulesfiles($) {
+ my ($provider) = @_;
+
+ # Array to store the used rulefiles.
+ my @used_rulesfiles = ();
+
+ # Get the used rulesefile file for the provider.
+ my $rulesfile_file = &get_used_provider_rulesfile_file($provider);
+
+ # Check if the used rulesfile is empty.
+ unless (-z $rulesfile_file) {
+ # Open the file or used rulefiles and read-in content.
+ open(FILE, $rulesfile_file) or die "Could not open $rulesfile_file. $!\n";
+
+ while (<FILE>) {
+ # Assign the current line to a nice variable.
+ my $line = $_;
+
+ # Remove newlines.
+ chomp($line);
+
+ # Skip comments.
+ next if ($line =~ /\#/);
+
+ # Skip blank lines.
+ next if ($line =~ /^\s*$/);
+
+ # Gather the rulefile.
+ if ($line =~ /.*- (.*)/) {
+ my $rulefile = $1;
+
+ # Add the rulefile to the array of used rulesfiles.
+ push(@used_rulesfiles, $rulefile);
+ }
+ }
+
+ # Close the file.
+ close(FILE);
+ }
+
+ # Return the array of used rulesfiles.
+ return @used_rulesfiles;
+}
+
#
## Function to write the lock file for locking the WUI, while
## the autoupdate script runs.
projects / ipfire-2.x.git / blobdiff