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// Copyright (C) 2022 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "utility.hpp"
void
utility::load_policy_data(std::string _input,
std::vector<vsomeip_v3::configuration_element> &_elements,
std::set<std::string> &_failed) {
boost::property_tree::ptree its_tree;
try {
boost::property_tree::json_parser::read_json(_input, its_tree);
_elements.push_back({ _input, its_tree });
}
catch (boost::property_tree::json_parser_error &e) {
_failed.insert(_input);
}
}
void
utility::read_data(const std::set<std::string> &_input,
std::vector<vsomeip_v3::configuration_element> &_elements,
std::set<std::string> &_failed) {
for (auto i : _input) {
if (vsomeip_v3::utility::is_file(i)) {
load_policy_data(i, _elements, _failed);
} else if (vsomeip_v3::utility::is_folder(i)) {
std::map<std::string, bool> its_names;
boost::filesystem::path its_path(i);
for (auto j = boost::filesystem::directory_iterator(its_path);
j != boost::filesystem::directory_iterator();
j++) {
std::string name = j->path().string() + "/vsomeip_security.json";
if (vsomeip_v3::utility::is_file(name))
its_names[name] = true;
}
for (const auto& n : its_names)
load_policy_data(n.first, _elements, _failed);
}
}
}
std::set<std::string>
utility::get_all_files_in_dir(const std::string &_dir_path,
const std::vector<std::string> &_dir_skip_list) {
// Create a vector of string
std::set<std::string> list_of_files;
try {
// Check if given path exists and points to a directory
if (boost::filesystem::exists(_dir_path)
&& boost::filesystem::is_directory(_dir_path)) {
// Create a Recursive Directory Iterator object and points to the
// starting of directory
boost::filesystem::recursive_directory_iterator iter(_dir_path);
// Create a Recursive Directory Iterator object pointing to end.
boost::filesystem::recursive_directory_iterator end;
// Iterate till end
while (iter != end) {
// Check if current entry is a directory and if exists in
// skip list
if (boost::filesystem::is_directory(iter->path())
&& (std::find(_dir_skip_list.begin(),
_dir_skip_list.end(), iter->path().filename())
!= _dir_skip_list.end())) {
// Boost Filesystem API to skip current directory iteration
#if VSOMEIP_BOOST_VERSION < 108100
iter.no_push();
#else
iter.disable_recursion_pending();
#endif
} else {
// Add the name in vector
list_of_files.insert(iter->path().string());
}
boost::system::error_code ec;
// Increment the iterator to point to next entry in recursive iteration
iter.increment(ec);
if (ec) {
std::cerr << "Error While Accessing : " << iter->path().string() << " :: " << ec.message() << '\n';
}
}
}
}
catch (std::system_error & e) {
std::cerr << "Exception :: " << e.what();
}
return list_of_files;
}
std::string
utility::get_policies_path() {
return boost::filesystem::canonical(
boost::filesystem::current_path()).string()
+ "/../test/common/examples_policies";
}
vsomeip_sec_client_t
utility::create_uds_client(uid_t user, gid_t group) {
vsomeip_sec_client_t result;
result.client_type = VSOMEIP_CLIENT_UDS;
result.client.uds_client = { user, group };
return result;
}
void
utility::force_check_credentials(
std::vector<vsomeip_v3::configuration_element> &_policy_elements,
std::string _value) {
for(auto &i : _policy_elements) {
try {
boost::property_tree::ptree &security
= i.tree_.get_child("security");
boost::property_tree::ptree &credentials
= security.get_child("check_credentials");
if (credentials.get_value<std::string>().compare(_value)) {
security.erase("check_credentials");
credentials.put("check_credentials", _value);
}
}
catch(...) {}
}
}
void utility::get_policy_uids(vsomeip_v3::configuration_element &_policy_element,
std::vector<vsomeip_v3::uid_t> &_out_uids)
{
try {
std::vector<std::string> user_ids;
auto policy_tree = _policy_element.tree_.get_child("security.policies");
for (auto policy_node : policy_tree) {
auto optional_credential_node =
policy_node.second.get_child_optional("credentials.uid");
if (optional_credential_node) {
auto optional_user_id =
optional_credential_node.get().get_value_optional<std::string>();
if (optional_user_id) {
user_ids.push_back(optional_user_id.get());
}
}
}
for (const std::string &uid_string : user_ids) {
_out_uids.push_back((vsomeip_v3::uid_t)std::strtoul(uid_string.c_str(), NULL, 0));
}
} catch (...) {
std::cerr << "Caught exception while reading user ids in policy element \""
<< _policy_element.name_ << "\"!" << std::endl;
}
}
void utility::get_policy_services(vsomeip_v3::configuration_element &_policy_element,
std::vector<vsomeip_v3::service_t> &_out_services)
{
try {
std::vector<std::string> services;
auto policy_tree = _policy_element.tree_.get_child("security.policies");
for (auto policy_node : policy_tree) {
// Get allowed request services.
auto allow_requests = policy_node.second.get_child_optional("allow.requests");
if (allow_requests) {
for (auto &request_node : allow_requests.get()) {
auto optional_service = request_node.second.get_child("service")
.get_value_optional<std::string>();
if (optional_service) {
services.push_back(optional_service.get());
}
}
}
// Get denied request services.
auto deny_requests = policy_node.second.get_child_optional("deny.requests");
if (deny_requests) {
for (auto &request_node : deny_requests.get()) {
auto optional_service = request_node.second.get_child("service")
.get_value_optional<std::string>();
if (optional_service) {
services.push_back(optional_service.get());
}
}
}
}
for (const std::string &service_str : services) {
_out_services.push_back(
(vsomeip_v3::service_t)std::strtoul(service_str.c_str(), NULL, 0));
}
} catch (...) {
std::cerr << "Caught exception while reading services in policy element \""
<< _policy_element.name_ << "\"!" << std::endl;
}
}
void utility::add_security_whitelist(vsomeip_v3::configuration_element &_policy_element,
const bool _check_whitelist)
{
std::vector<vsomeip_v3::uid_t> user_ids;
get_policy_uids(_policy_element, user_ids);
std::vector<vsomeip_v3::service_t> services;
get_policy_services(_policy_element, services);
add_security_whitelist(_policy_element, user_ids, services, _check_whitelist);
}
void utility::add_security_whitelist(vsomeip_v3::configuration_element &_policy_element,
const std::vector<vsomeip_v3::uid_t> &_user_ids,
const std::vector<vsomeip_v3::service_t> &_services,
const bool _check_whitelist)
{
// Add the user ids to the whitelist.
boost::property_tree::ptree id_array_node;
for (auto user_id : _user_ids) {
boost::property_tree::ptree id_node;
id_node.put("", user_id);
id_array_node.push_back(std::make_pair("", id_node));
}
_policy_element.tree_.add_child("security-update-whitelist.uids", id_array_node);
// Add the services to the whitelist.
boost::property_tree::ptree service_array_node;
for (auto service : _services) {
boost::property_tree::ptree service_node;
service_node.put("", service);
service_array_node.push_back(std::make_pair("", service_node));
}
_policy_element.tree_.add_child("security-update-whitelist.services", service_array_node);
// Update the 'check_whitelist' flag.
_policy_element.tree_.add<bool>("security-update-whitelist.check-whitelist", _check_whitelist);
}
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