#!/usr/local/bin/python2.7 """ Copyright (c) 2015 Ad Schellevis 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. -------------------------------------------------------------------------------------- Install suricata ruleset into opnsense.rules directory """ import os.path from ConfigParser import ConfigParser import lib.rulecache from lib import rule_source_directory if __name__ == '__main__': RuleCache = lib.rulecache.RuleCache() rule_config_fn = ('%s../rules.config' % rule_source_directory) rule_target_dir = ('%s../opnsense.rules' % rule_source_directory) rule_yaml_list = ('%s../installed_rules.yaml' % rule_source_directory) # parse OPNsense rule config rule_updates = {} if os.path.exists(rule_config_fn): cnf = ConfigParser() cnf.read(rule_config_fn) for section in cnf.sections(): if section[0:5] == 'rule_': sid = section[5:] rule_updates[sid] = {} for rule_item in cnf.items(section): rule_updates[sid][rule_item[0]] = rule_item[1] # create target rule directory if not existing if not os.path.exists(rule_target_dir): os.mkdir(rule_target_dir, 0o755) # install ruleset all_installed_files = [] for filename in RuleCache.list_local(): output_data = [] for rule_info_record in RuleCache.list_rules(filename=filename): # default behavior, do not touch rule, only copy to output rule = rule_info_record['rule'] # change rule if in rule rule updates if rule_info_record['metadata'] is not None and 'sid' in rule_info_record['metadata'] \ and rule_info_record['metadata']['sid'] in rule_updates: # search last comment marker for i in range(len(rule_info_record['rule'])): if rule[i] != '#': break # generate altered rule if 'enabled' in rule_updates[rule_info_record['metadata']['sid']]: # enabled / disabled in configuration if (rule_updates[rule_info_record['metadata']['sid']]['enabled']) == '0': rule = ('#%s' % rule[i:]) else: rule = rule[i:] if 'action' in rule_updates[rule_info_record['metadata']['sid']]: # (new) action in configuration new_action = rule_updates[rule_info_record['metadata']['sid']]['action'] if rule[0] == '#': rule = '#%s %s' % (new_action, ' '.join(rule.split(' ')[1:])) else: rule = '%s %s' % (new_action, ' '.join(rule.split(' ')[1:])) output_data.append(rule) # write data to file all_installed_files.append(filename.split('/')[-1]) open('%s/%s' % (rule_target_dir, filename.split('/')[-1]), 'wb').write('\n'.join(output_data)) # flush all written rule filenames into yaml file with open(rule_yaml_list, 'wb') as f_out: f_out.write('%YAML 1.1\n') f_out.write('---\n') f_out.write('rule-files:\n') for installed_file in all_installed_files: f_out.write(' - %s\n' % installed_file)