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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
// Copyright (c) 2006-2008 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/src/sandbox_utils.h"
#include <windows.h>
#include "base/logging.h"
#include "sandbox/src/internal_types.h"
#include "sandbox/src/nt_internals.h"
namespace sandbox {
bool GetModuleHandleHelper(DWORD flags, const wchar_t* module_name,
HMODULE* module) {
DCHECK(module);
HMODULE kernel32_base = ::GetModuleHandle(kKerneldllName);
if (!kernel32_base) {
NOTREACHED();
return false;
}
GetModuleHandleExFunction get_module_handle_ex = reinterpret_cast<
GetModuleHandleExFunction>(::GetProcAddress(kernel32_base,
"GetModuleHandleExW"));
if (get_module_handle_ex) {
BOOL ret = get_module_handle_ex(flags, module_name, module);
return (ret ? true : false);
}
if (!flags) {
*module = ::LoadLibrary(module_name);
} else if (flags & GET_MODULE_HANDLE_EX_FLAG_PIN) {
NOTREACHED();
return false;
} else if (!(flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)) {
DCHECK((flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT) ==
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT);
*module = ::GetModuleHandle(module_name);
} else {
DCHECK((flags & (GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)) ==
(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS));
MEMORY_BASIC_INFORMATION info = {0};
size_t returned = VirtualQuery(module_name, &info, sizeof(info));
if (sizeof(info) != returned)
return false;
*module = reinterpret_cast<HMODULE>(info.AllocationBase);
}
return true;
}
bool IsXPSP2OrLater() {
OSVERSIONINFOEX version = {0};
version.dwOSVersionInfoSize = sizeof(version);
if (!::GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&version))) {
NOTREACHED();
return false;
}
// Vista or later
if (version.dwMajorVersion > 5)
return true;
// 2k, xp or 2003
if (version.dwMajorVersion == 5) {
// 2003
if (version.dwMinorVersion > 1)
return true;
// 2000
if (version.dwMinorVersion == 0)
return false;
// Windows Xp Sp2 or later
if (version.wServicePackMajor >= 2)
return true;
}
return false;
}
void InitObjectAttribs(const std::wstring& name, ULONG attributes, HANDLE root,
OBJECT_ATTRIBUTES* obj_attr, UNICODE_STRING* uni_name) {
static RtlInitUnicodeStringFunction RtlInitUnicodeString;
if (!RtlInitUnicodeString) {
HMODULE ntdll = ::GetModuleHandle(kNtdllName);
RtlInitUnicodeString = reinterpret_cast<RtlInitUnicodeStringFunction>(
GetProcAddress(ntdll, "RtlInitUnicodeString"));
DCHECK(RtlInitUnicodeString);
}
RtlInitUnicodeString(uni_name, name.c_str());
InitializeObjectAttributes(obj_attr, uni_name, attributes, root, NULL);
}
std::string WideToMultiByte(const std::wstring& wide) {
if (wide.length() == 0)
return std::string();
// compute the length of the buffer we'll need
int charcount = WideCharToMultiByte(CP_UTF8, 0, wide.c_str(), -1,
NULL, 0, NULL, NULL);
if (charcount == 0)
return std::string();
std::string mb;
WideCharToMultiByte(CP_UTF8, 0, wide.c_str(), -1,
WriteInto(&mb, charcount), charcount, NULL, NULL);
return mb;
}
}; // namespace sandbox
|
