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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sandbox/win/src/sync_dispatcher.h"
#include <stdint.h>
#include "base/win/windows_version.h"
#include "sandbox/win/src/crosscall_client.h"
#include "sandbox/win/src/interception.h"
#include "sandbox/win/src/interceptors.h"
#include "sandbox/win/src/ipc_tags.h"
#include "sandbox/win/src/policy_broker.h"
#include "sandbox/win/src/policy_params.h"
#include "sandbox/win/src/sandbox.h"
#include "sandbox/win/src/sync_interception.h"
#include "sandbox/win/src/sync_policy.h"
namespace sandbox {
SyncDispatcher::SyncDispatcher(PolicyBase* policy_base)
: policy_base_(policy_base) {
static const IPCCall create_params = {
{IpcTag::CREATEEVENT, {WCHAR_TYPE, UINT32_TYPE, UINT32_TYPE}},
reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)};
static const IPCCall open_params = {
{IpcTag::OPENEVENT, {WCHAR_TYPE, UINT32_TYPE}},
reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)};
ipc_calls_.push_back(create_params);
ipc_calls_.push_back(open_params);
}
bool SyncDispatcher::SetupService(InterceptionManager* manager,
IpcTag service) {
if (service == IpcTag::CREATEEVENT) {
return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
}
return (service == IpcTag::OPENEVENT) &&
INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
}
bool SyncDispatcher::CreateEvent(IPCInfo* ipc,
std::wstring* name,
uint32_t event_type,
uint32_t initial_state) {
const wchar_t* event_name = name->c_str();
CountedParameterSet<NameBased> params;
params[NameBased::NAME] = ParamPickerMake(event_name);
EvalResult result =
policy_base_->EvalPolicy(IpcTag::CREATEEVENT, params.GetBase());
HANDLE handle = nullptr;
// Return operation status on the IPC.
ipc->return_info.nt_status = SyncPolicy::CreateEventAction(
result, *ipc->client_info, *name, event_type, initial_state, &handle);
ipc->return_info.handle = handle;
return true;
}
bool SyncDispatcher::OpenEvent(IPCInfo* ipc,
std::wstring* name,
uint32_t desired_access) {
const wchar_t* event_name = name->c_str();
CountedParameterSet<OpenEventParams> params;
params[OpenEventParams::NAME] = ParamPickerMake(event_name);
params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
EvalResult result =
policy_base_->EvalPolicy(IpcTag::OPENEVENT, params.GetBase());
HANDLE handle = nullptr;
// Return operation status on the IPC.
ipc->return_info.nt_status = SyncPolicy::OpenEventAction(
result, *ipc->client_info, *name, desired_access, &handle);
ipc->return_info.handle = handle;
return true;
}
} // namespace sandbox