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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/application.h"
#include "application_manager/message_helper.h"
#include "utils/helpers.h"
SDL_CREATE_LOG_VARIABLE("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) {
SDL_LOG_AUTO_TRACE();
}
bool RPCProtectionManagerImpl::CheckPolicyEncryptionFlag(
const uint32_t function_id,
const ApplicationSharedPtr app,
const bool is_rpc_service_secure) const {
SDL_LOG_AUTO_TRACE();
const auto& policy_encryption_flag_getter =
policy_handler_.PolicyEncryptionFlagGetter();
if (!policy_encryption_flag_getter) {
SDL_LOG_ERROR("Policy Encryption Flag getter is not inited");
return false;
}
const std::string function_name =
policy_encryption_flag_getter->GetPolicyFunctionName(function_id);
SDL_LOG_DEBUG("Function for check is " << function_name);
if (!is_rpc_service_secure && IsExceptionRPC(function_id)) {
SDL_LOG_WARN(
"Exception RPC can be sent in an non secure service despite "
"encryption required flag");
return false;
}
if (!app) {
SDL_LOG_WARN("Received app nullptr");
return false;
}
const auto policy_app_id = app->policy_app_id();
return IsEncryptionRequiredByPolicy(policy_app_id, function_name);
}
bool RPCProtectionManagerImpl::IsEncryptionRequiredByPolicy(
const std::string& policy_app_id, const std::string& function_name) const {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(encrypted_rpcs_lock_);
auto it = encrypted_rpcs_.find(policy_app_id);
if (encrypted_rpcs_.end() == it) {
SDL_LOG_WARN("App specific policies for app: " << policy_app_id
<< " not found");
it = encrypted_rpcs_.find(policy_table::kDefaultApp);
return encrypted_rpcs_.end() != it
? (*it).second.find(function_name) != (*it).second.end()
: false;
}
return (*it).second.find(function_name) != (*it).second.end();
}
bool RPCProtectionManagerImpl::IsInEncryptionNeededCache(
const uint32_t app_id, const uint32_t correlation_id) const {
SDL_LOG_AUTO_TRACE();
SDL_LOG_DEBUG("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) {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(message_needed_encryption_lock_);
SDL_LOG_DEBUG("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) {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(message_needed_encryption_lock_);
SDL_LOG_DEBUG("Removing rpc with correlation id: " << correlation_id);
encryption_needed_cache_.erase(std::make_pair(app_id, correlation_id));
}
void RPCProtectionManagerImpl::OnPTUFinished(const bool ptu_result) {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(encrypted_rpcs_lock_);
if (ptu_result) {
SDL_LOG_TRACE(
"PTU finished successfully, commencing internal encrypted "
"RPC cache update");
encrypted_rpcs_.clear();
SaveEncryptedRPC();
} else {
SDL_LOG_WARN(
"PTU was unsuccessful. Keeping internal RPC cache from "
"current snapshot");
}
}
void RPCProtectionManagerImpl::SaveEncryptedRPC() {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(encrypted_rpcs_lock_);
const auto policy_encryption_flag_getter =
policy_handler_.PolicyEncryptionFlagGetter();
if (policy_encryption_flag_getter) {
const auto policy_policy_app_ids =
policy_encryption_flag_getter->GetApplicationPolicyIDs();
for (const auto& app : policy_policy_app_ids) {
SDL_LOG_DEBUG("Processing app name: " << app);
encrypted_rpcs_[app] = GetEncryptedRPCsForApp(app);
}
}
}
void RPCProtectionManagerImpl::OnPTInited() {
SDL_LOG_AUTO_TRACE();
sync_primitives::AutoLock lock(encrypted_rpcs_lock_);
encrypted_rpcs_.clear();
SaveEncryptedRPC();
}
RPCProtectionManagerImpl::FunctionNames
RPCProtectionManagerImpl::GetEncryptedRPCsForApp(
const std::string& policy_app_id) {
SDL_LOG_AUTO_TRACE();
FunctionNames encrypted_rpcs;
const auto policy_encryption_flag_getter =
policy_handler_.PolicyEncryptionFlagGetter();
if (!policy_encryption_flag_getter->AppNeedEncryption(policy_app_id)) {
return encrypted_rpcs;
}
const auto function_groups =
policy_encryption_flag_getter->GetFunctionalGroupsForApp(policy_app_id);
auto fill_encrypted_rpcs =
[&encrypted_rpcs](const std::string& function_name) {
SDL_LOG_DEBUG("Adding required encryprion rpc: " << function_name);
encrypted_rpcs.insert(function_name);
};
for (const auto& function_group : function_groups) {
if (policy_encryption_flag_getter->FunctionGroupNeedEncryption(
function_group)) {
auto rpcs = policy_encryption_flag_getter->GetRPCsForFunctionGroup(
function_group);
std::for_each(rpcs.begin(), rpcs.end(), fill_encrypted_rpcs);
}
}
return encrypted_rpcs;
}
} // namespace application_manager
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