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 <stdint.h>
8
9 #include "base/win/windows_version.h"
10 #include "sandbox/win/src/crosscall_client.h"
11 #include "sandbox/win/src/interception.h"
12 #include "sandbox/win/src/interceptors.h"
13 #include "sandbox/win/src/ipc_tags.h"
14 #include "sandbox/win/src/policy_broker.h"
15 #include "sandbox/win/src/policy_params.h"
16 #include "sandbox/win/src/sandbox.h"
17 #include "sandbox/win/src/sync_interception.h"
18 #include "sandbox/win/src/sync_policy.h"
19
20 namespace sandbox {
21
SyncDispatcher(PolicyBase * policy_base)22 SyncDispatcher::SyncDispatcher(PolicyBase* policy_base)
23 : policy_base_(policy_base) {
24 static const IPCCall create_params = {
25 {IpcTag::CREATEEVENT, {WCHAR_TYPE, UINT32_TYPE, UINT32_TYPE}},
26 reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)};
27
28 static const IPCCall open_params = {
29 {IpcTag::OPENEVENT, {WCHAR_TYPE, UINT32_TYPE}},
30 reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)};
31
32 ipc_calls_.push_back(create_params);
33 ipc_calls_.push_back(open_params);
34 }
35
SetupService(InterceptionManager * manager,IpcTag service)36 bool SyncDispatcher::SetupService(InterceptionManager* manager,
37 IpcTag service) {
38 if (service == IpcTag::CREATEEVENT) {
39 return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
40 }
41 return (service == IpcTag::OPENEVENT) &&
42 INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
43 }
44
CreateEvent(IPCInfo * ipc,std::wstring * name,uint32_t event_type,uint32_t initial_state)45 bool SyncDispatcher::CreateEvent(IPCInfo* ipc,
46 std::wstring* name,
47 uint32_t event_type,
48 uint32_t initial_state) {
49 const wchar_t* event_name = name->c_str();
50 CountedParameterSet<NameBased> params;
51 params[NameBased::NAME] = ParamPickerMake(event_name);
52
53 EvalResult result =
54 policy_base_->EvalPolicy(IpcTag::CREATEEVENT, params.GetBase());
55 HANDLE handle = nullptr;
56 // Return operation status on the IPC.
57 ipc->return_info.nt_status = SyncPolicy::CreateEventAction(
58 result, *ipc->client_info, *name, event_type, initial_state, &handle);
59 ipc->return_info.handle = handle;
60 return true;
61 }
62
OpenEvent(IPCInfo * ipc,std::wstring * name,uint32_t desired_access)63 bool SyncDispatcher::OpenEvent(IPCInfo* ipc,
64 std::wstring* name,
65 uint32_t 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 =
73 policy_base_->EvalPolicy(IpcTag::OPENEVENT, params.GetBase());
74 HANDLE handle = nullptr;
75 // Return operation status on the IPC.
76 ipc->return_info.nt_status = SyncPolicy::OpenEventAction(
77 result, *ipc->client_info, *name, desired_access, &handle);
78 ipc->return_info.handle = handle;
79 return true;
80 }
81
82 } // namespace sandbox
83