1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "sandbox/win/src/sync_dispatcher.h"
6
7#include "base/win/windows_version.h"
8#include "sandbox/win/src/crosscall_client.h"
9#include "sandbox/win/src/interception.h"
10#include "sandbox/win/src/interceptors.h"
11#include "sandbox/win/src/ipc_tags.h"
12#include "sandbox/win/src/policy_broker.h"
13#include "sandbox/win/src/policy_params.h"
14#include "sandbox/win/src/sandbox.h"
15#include "sandbox/win/src/sync_interception.h"
16#include "sandbox/win/src/sync_policy.h"
17
18namespace sandbox {
19
20SyncDispatcher::SyncDispatcher(PolicyBase* policy_base)
21    : policy_base_(policy_base) {
22  static const IPCCall create_params = {
23    {IPC_CREATEEVENT_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE},
24    reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)
25  };
26
27  static const IPCCall open_params = {
28    {IPC_OPENEVENT_TAG, WCHAR_TYPE, ULONG_TYPE},
29    reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)
30  };
31
32  ipc_calls_.push_back(create_params);
33  ipc_calls_.push_back(open_params);
34}
35
36bool SyncDispatcher::SetupService(InterceptionManager* manager,
37                                  int service) {
38  if (IPC_CREATEEVENT_TAG == service) {
39    return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
40  } else if (IPC_OPENEVENT_TAG == service) {
41    return INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
42  }
43  return false;
44}
45
46bool SyncDispatcher::CreateEvent(IPCInfo* ipc, base::string16* name,
47                                 DWORD event_type, DWORD initial_state) {
48  const wchar_t* event_name = name->c_str();
49  CountedParameterSet<NameBased> params;
50  params[NameBased::NAME] = ParamPickerMake(event_name);
51
52  EvalResult result = policy_base_->EvalPolicy(IPC_CREATEEVENT_TAG,
53                                               params.GetBase());
54  HANDLE handle = NULL;
55  DWORD ret = SyncPolicy::CreateEventAction(result, *ipc->client_info, *name,
56                                            event_type, initial_state,
57                                            &handle);
58  // Return operation status on the IPC.
59  ipc->return_info.nt_status = ret;
60  ipc->return_info.handle = handle;
61  return true;
62}
63
64bool SyncDispatcher::OpenEvent(IPCInfo* ipc, base::string16* name,
65                               DWORD desired_access) {
66  const wchar_t* event_name = name->c_str();
67
68  CountedParameterSet<OpenEventParams> params;
69  params[OpenEventParams::NAME] = ParamPickerMake(event_name);
70  params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
71
72  EvalResult result = policy_base_->EvalPolicy(IPC_OPENEVENT_TAG,
73                                               params.GetBase());
74  HANDLE handle = NULL;
75  DWORD ret = SyncPolicy::OpenEventAction(result, *ipc->client_info, *name,
76                                          desired_access, &handle);
77  // Return operation status on the IPC.
78  ipc->return_info.win32_result = ret;
79  ipc->return_info.handle = handle;
80  return true;
81}
82
83}  // namespace sandbox
84