1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// 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 "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 = {
{IPC_CREATEEVENT_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE},
reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)
};
static const IPCCall open_params = {
{IPC_OPENEVENT_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE},
reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)
};
ipc_calls_.push_back(create_params);
ipc_calls_.push_back(open_params);
}
bool SyncDispatcher::SetupService(InterceptionManager* manager,
int service) {
bool ret = false;
static const wchar_t* kWin32SyncDllName =
base::win::GetVersion() >= base::win::VERSION_WIN7 ? kKernelBasedllName :
kKerneldllName;
// We need to intercept kernelbase.dll on Windows 8 and beyond and
// kernel32.dll for earlier versions.
if (IPC_CREATEEVENT_TAG == service) {
ret = INTERCEPT_EAT(manager, kWin32SyncDllName, CreateEventW,
CREATE_EVENTW_ID, 20);
if (ret) {
ret = INTERCEPT_EAT(manager, kWin32SyncDllName, CreateEventA,
CREATE_EVENTA_ID, 20);
}
} else if (IPC_OPENEVENT_TAG == service) {
ret = INTERCEPT_EAT(manager, kWin32SyncDllName, OpenEventW, OPEN_EVENTW_ID,
16);
if (ret) {
ret = INTERCEPT_EAT(manager, kWin32SyncDllName, OpenEventW,
OPEN_EVENTA_ID, 16);
}
}
return ret;
}
bool SyncDispatcher::CreateEvent(IPCInfo* ipc, std::wstring* name,
DWORD manual_reset, DWORD initial_state) {
const wchar_t* event_name = name->c_str();
CountedParameterSet<NameBased> params;
params[NameBased::NAME] = ParamPickerMake(event_name);
EvalResult result = policy_base_->EvalPolicy(IPC_CREATEEVENT_TAG,
params.GetBase());
HANDLE handle = NULL;
DWORD ret = SyncPolicy::CreateEventAction(result, *ipc->client_info, *name,
manual_reset, initial_state,
&handle);
// Return operation status on the IPC.
ipc->return_info.win32_result = ret;
ipc->return_info.handle = handle;
return true;
}
bool SyncDispatcher::OpenEvent(IPCInfo* ipc, std::wstring* name,
DWORD desired_access, DWORD inherit_handle) {
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(IPC_OPENEVENT_TAG,
params.GetBase());
HANDLE handle = NULL;
DWORD ret = SyncPolicy::OpenEventAction(result, *ipc->client_info, *name,
desired_access, inherit_handle,
&handle);
// Return operation status on the IPC.
ipc->return_info.win32_result = ret;
ipc->return_info.handle = handle;
return true;
}
} // namespace sandbox
|
