#!/usr/local/bin/python2.7 """ Copyright (c) 2015 Ad Schellevis part of OPNsense (https://www.opnsense.org/) All rights reserved. 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. 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 AUTHOR BE LIABLE FOR 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. -------------------------------------------------------------------------------------- update suricata rules """ import os import sys import fcntl from ConfigParser import ConfigParser from lib import metadata from lib import downloader from lib import rule_source_directory # check for a running update process, this may take a while so it's better to check... try: lck = open('/tmp/suricata-rule-updater.py','w+') fcntl.flock(lck, fcntl.LOCK_EX | fcntl.LOCK_NB) except IOError: # already running, exit status 99 sys.exit(99) if __name__ == '__main__': # load list of configured rules from generated config enabled_rulefiles=[] updater_conf='/usr/local/etc/suricata/rule-updater.config' if os.path.exists(updater_conf): cnf = ConfigParser() cnf.read(updater_conf) for section in cnf.sections(): if cnf.has_option(section,'enabled') and cnf.getint(section,'enabled') == 1: enabled_rulefiles.append(section.strip()) # download / remove rules md = metadata.Metadata() dl = downloader.Downloader(target_dir=rule_source_directory) for rule in md.list_rules(): if 'url' in rule['source']: download_proto=str(rule['source']['url']).split(':')[0].lower() if dl.is_supported(download_proto): if rule['filename'] not in enabled_rulefiles: try: # remove configurable but unselected file os.remove(('%s/%s'%(rule_source_directory, rule['filename'])).replace('//', '/')) except: pass else: url = ('%s/%s'%(rule['source']['url'],rule['filename'])) dl.download(proto=download_proto, url=url)