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/*
* Copyright (c) 2019, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Ford Motor Company 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
#include "application_manager/rpc_protection_manager_impl.h"
#include "application_manager/message_helper.h"
#include "application_manager/application.h"
#include "utils/helpers.h"
CREATE_LOGGERPTR_LOCAL(logger_, "RPCProtectionManagerImpl");
namespace application_manager {
namespace rpc_encryption_exceptions {
std::vector<std::string> kExceptionRPCs = {"RegisterAppInterface",
"SystemRequest",
"OnPermissionsChange",
"OnSystemRequest",
"PutFile",
"OnHMIStatus"};
}
RPCProtectionManagerImpl::RPCProtectionManagerImpl(
policy::PolicyHandlerInterface& policy_handler)
: policy_handler_(policy_handler) {
LOG4CXX_AUTO_TRACE(logger_);
}
bool RPCProtectionManagerImpl::IsFunctionInGroup(
const std::string& function_name, const std::string& group) const {
const auto policy_encryption_flag_getter =
policy_handler_.PolicyEncryptionFlagGetter();
const auto group_rpcs =
policy_encryption_flag_getter->GetRPCsForFunctionGroup(group);
const auto it =
std::find(group_rpcs.begin(), group_rpcs.end(), function_name);
const bool is_function_in_group = it != group_rpcs.end();
LOG4CXX_DEBUG(logger_,
"Function is in group " << std::boolalpha
<< is_function_in_group);
return is_function_in_group;
}
bool RPCProtectionManagerImpl::CheckPolicyEncryptionFlag(
const uint32_t function_id,
const ApplicationSharedPtr app,
const uint32_t correlation_id,
const bool is_rpc_service_secure) const {
LOG4CXX_AUTO_TRACE(logger_);
const auto& policy_encryption_flag_getter =
policy_handler_.PolicyEncryptionFlagGetter();
const std::string function_name =
policy_encryption_flag_getter->GetPolicyFunctionName(function_id);
LOG4CXX_DEBUG(logger_,
"Function for check is " << function_name
<< " conrrelation_id is "
<< correlation_id);
if (!is_rpc_service_secure && IsExceptionRPC(function_id)) {
LOG4CXX_WARN(logger_,
"Exception RPC can be sent in an non secure service despite "
"encryption required flag");
return false;
}
if (!app) {
LOG4CXX_WARN(logger_, "Received app nullptr");
return false;
}
const auto policy_app_id = app->policy_app_id();
if (!policy_encryption_flag_getter->AppNeedEncryption(policy_app_id)) {
LOG4CXX_TRACE(logger_, "Application does not require encryption");
return false;
}
const auto app_rpc_groups =
policy_encryption_flag_getter->GetFunctionGroupsForApp(policy_app_id);
for (const auto& group : app_rpc_groups) {
const bool is_function_in_group = IsFunctionInGroup(function_name, group);
if (is_function_in_group &&
policy_encryption_flag_getter->FunctionGroupNeedEncryption(group)) {
LOG4CXX_DEBUG(logger_,
"Message needs encryption. Function name is "
<< function_name);
return true;
}
}
return false;
}
bool RPCProtectionManagerImpl::IsInEncryptionNeededCache(
const uint32_t app_id, const uint32_t correlation_id) const {
LOG4CXX_AUTO_TRACE(logger_);
LOG4CXX_DEBUG(logger_, "correlation_id is " << correlation_id);
return encryption_needed_cache_.find(std::make_pair(
app_id, correlation_id)) != encryption_needed_cache_.end();
}
bool RPCProtectionManagerImpl::IsExceptionRPC(
const uint32_t function_id) const {
using namespace rpc_encryption_exceptions;
const std::string policy_fucntion_id = policy_table::EnumToJsonString(
static_cast<policy_table::FunctionID>(function_id));
return helpers::in_range(kExceptionRPCs, policy_fucntion_id);
}
void RPCProtectionManagerImpl::AddToEncryptionNeededCache(
const uint32_t app_id, const uint32_t correlation_id) {
LOG4CXX_AUTO_TRACE(logger_);
sync_primitives::AutoLock lock(message_needed_encryption_lock_);
LOG4CXX_DEBUG(logger_, "Adding rpc with correlation id: " << correlation_id);
encryption_needed_cache_.insert(std::make_pair(app_id, correlation_id));
}
void RPCProtectionManagerImpl::RemoveFromEncryptionNeededCache(
const uint32_t app_id, const uint32_t correlation_id) {
LOG4CXX_AUTO_TRACE(logger_);
sync_primitives::AutoLock lock(message_needed_encryption_lock_);
LOG4CXX_DEBUG(logger_,
"Removing rpc with correlation id: " << correlation_id);
encryption_needed_cache_.erase(std::make_pair(app_id, correlation_id));
}
smart_objects::SmartObjectSPtr
RPCProtectionManagerImpl::CreateEncryptionNeededResponse(
const uint32_t connection_key,
const uint32_t function_id,
const uint32_t correlation_id) {
LOG4CXX_AUTO_TRACE(logger_);
auto it = encryption_needed_cache_.find(
std::make_pair(connection_key, correlation_id));
if (it != encryption_needed_cache_.end()) {
encryption_needed_cache_.erase(it);
} else {
LOG4CXX_WARN(logger_,
"RPC for correlation id: " << correlation_id << " and app id: "
<< connection_key << " not found");
}
return MessageHelper::CreateNegativeResponse(
connection_key,
function_id,
correlation_id,
static_cast<int32_t>(mobile_apis::Result::ENCRYPTION_NEEDED));
}
} // namespace protocol_handler
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