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#!/usr/bin/perl -w
#
# WardenClientReceive.pm
#
# Copyright (C) 2011 Cesnet z.s.p.o
# Author(s): Tomas PLESNIK <plesnik@ics.muni.cz>
# Jan SOUKAL <soukal@ics.muni.cz>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name of the Cesnet z.s.p.o nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# This software is provided ``as is'', and any express or implied
# warranties, including, but not limited to, the implied warranties of
# merchantability and fitness for a particular purpose are disclaimed.
# In no event shall the Cesnet z.s.p.o or contributors be liable for
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# any direct, indirect, incidental, special, exemplary, or consequential
# damages (including, but not limited to, procurement of substitute
# goods or services; loss of use, data, or profits; or business
# interruption) however caused and on any theory of liability, whether
# in contract, strict liability, or tort (including negligence or
# otherwise) arising in any way out of the use of this software, even
# if advised of the possibility of such damage.
package WardenClientReceive;
use strict;
use SOAP::Lite;
use IO::Socket::SSL qw(debug1);
use SOAP::Transport::TCP;
use FindBin;
our $VERSION = 100;
#-------------------------------------------------------------------------------
# errMsg - print error message and die
#-------------------------------------------------------------------------------
sub errMsg
{
my $msg = shift;
die($msg . "\n");
} # End of errMsg
#-------------------------------------------------------------------------------
# c2s - connect to server, send request and receive response
#-------------------------------------------------------------------------------
sub c2s
{
my $uri = shift;
my $ssl_key_file = shift;
my $ssl_cert_file = shift;
my $ssl_ca_file = shift;
my $method = shift;
my $data = shift;
my $client;
my ($server, $port, $service) = $uri =~ /https:\/\/(.+)\:(\d+)\/(.+)/;
if (!($client = SOAP::Transport::TCP::Client->new(
PeerAddr => $server,
PeerPort => $port,
Proto => 'tcp',
SSL_use_cert => 1,
SSL_verify_mode => 0x02,
SSL_key_file => $ssl_key_file,
SSL_cert_file => $ssl_cert_file,
SSL_ca_file => $ssl_ca_file,
))) {errMsg("Sorry, unable to create socket: " . &SOAP::Transport::TCP::Client::errstr)}
# setting of URI and serialize SOAP envelope and data object
my $soap = SOAP::Lite->uri($uri);
my $envelope;
if (!defined $data) {
$envelope = $soap->serializer->envelope(method => $method);
} else {
$envelope = $soap->serializer->envelope(method => $method, $data);
}
# setting of TCP URI and send serialized SOAP envelope and data
my $tcp_uri = "tcp://$server:$port/$service";
my $result = $client->send_receive(envelope => $envelope, endpoint => $tcp_uri);
# check server response
if (!defined $result) {
errMsg("Error: server returned empty response. Probably problem with used SSL ceritificates.");
} else {
# deserialized response from server -> create SOAP envelope and data object
my $response = $soap->deserializer->deserialize($result);
# check SOAP fault status
$response->fault ? errMsg("Server sent error message:: " . $response->faultstring) : return $response;
}
}
#-------------------------------------------------------------------------------
# getNewEvents - get new events from warden server greater than last received ID
#-------------------------------------------------------------------------------
sub getNewEvents
{
my $warden_path = shift;
my $requested_type = shift;
my $vardir = $warden_path . "/var/";
my $etcdir = $warden_path . "/etc/";
my $libdir = $warden_path . "/lib/";
# read the config file
require $libdir . "WardenClientConf.pm";
my $conf_file = $etcdir . "warden-client.conf";
my ($uri, $ssl_key_file, $ssl_cert_file, $ssl_ca_file) = WardenClientConf::loadConf($conf_file);
# set name of ID file for each client aplication
my $caller_name = $FindBin::Script;
my $id_file = $vardir . $caller_name . ".id";
#-----------------------------------------------------------------------------
# get last ID from ID file (if exist) or
# get last ID from warden server DB and save it into ID file
my $last_id;
if (-e $id_file) {
open(ID, "< $id_file") || errMsg("Cannot open ID file $id_file: $!");
foreach(<ID>) {
$last_id = $_;
}
close ID;
} else {
my $response = c2s($uri, $ssl_key_file, $ssl_cert_file, $ssl_ca_file, "getLastId");
$last_id = $response->result;
open(ID, "> $id_file") || die ("Cannot open ID file $id_file: $!");
print ID $last_id;
close ID;
}
#-----------------------------------------------------------------------------
# get new events from warden server DB based on gathered last ID
# create SOAP data obejct
my $request_data = SOAP::Data->name(request => \SOAP::Data->value(
SOAP::Data->name(REQUESTED_TYPE => $requested_type),
SOAP::Data->name(LAST_ID => $last_id)
));
my $response = c2s($uri, $ssl_key_file, $ssl_cert_file, $ssl_ca_file, "getNewEvents", $request_data);
# match getNewEvents functions response
$response->match('/Envelope/Body/getNewEventsResponse/');
my ($id, $hostname, $service, $detected, $type, $source_type, $source, $target_proto, $target_port, $attack_scale, $note, $priority, $timeout);
my @events;
# parse returned SOAP data object
my $i = 1;
my $response_data = $response->valueof("[$i]");
while (defined $response_data) {
$id = $response_data->{'ID'};
$hostname = $response_data->{'HOSTNAME'};
$service = $response_data->{'SERVICE'};
$detected = $response_data->{'DETECTED'};
$type = $response_data->{'TYPE'};
$source_type = $response_data->{'SOURCE_TYPE'};
$source = $response_data->{'SOURCE'};
$target_proto = $response_data->{'TARGET_PROTO'};
$target_port = $response_data->{'TARGET_PORT'};
$attack_scale = $response_data->{'ATTACK_SCALE'};
$note = $response_data->{'NOTE'};
$priority = $response_data->{'PRIORITY'};
$timeout = $response_data->{'TIMEOUT'};
# push new event from warden server into @events which is returned
@event = ("$id", "$hostname", "$service", "$detected", "$type", "$source_type", "$source", "$target_proto", "$target_port", "$attack_scale", "$note", "$priority", "$timeout");
push (@events, \@event);
# set maximum received ID from current batch
if ($id > $last_id) {
$last_id = $id;
}
# go to the next received event
$i++;
$response_data = $response->valueof("[$i]");
}
# write last return ID
if (defined $last_id) { # must be defined for first check ID
open(ID, "> $id_file") || die ("Cannot open ID file $id_file: $!");
print ID $last_id;
close ID;
}
# return event array of arrays
return @events;
} # End of getNewEvents
1;