win_util.cc revision ddb351dbec246cf1fab5ec20d2d5520909041de1 
1// Copyright (c) 2011 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 "base/win/win_util.h"
6
7#include <aclapi.h>
8#include <shobjidl.h>  // Must be before propkey.
9#include <propkey.h>
10#include <propvarutil.h>
11#include <sddl.h>
12#include <shlobj.h>
13
14#include "base/logging.h"
15#include "base/memory/scoped_ptr.h"
16#include "base/win/registry.h"
17#include "base/string_util.h"
18#include "base/stringprintf.h"
19#include "base/threading/thread_restrictions.h"
20#include "base/win/scoped_handle.h"
21#include "base/win/windows_version.h"
22
23namespace base {
24namespace win {
25
26#define SIZEOF_STRUCT_WITH_SPECIFIED_LAST_MEMBER(struct_name, member) \
27    offsetof(struct_name, member) + \
28    (sizeof static_cast<struct_name*>(NULL)->member)
29#define NONCLIENTMETRICS_SIZE_PRE_VISTA \
30    SIZEOF_STRUCT_WITH_SPECIFIED_LAST_MEMBER(NONCLIENTMETRICS, lfMessageFont)
31
32void GetNonClientMetrics(NONCLIENTMETRICS* metrics) {
33  DCHECK(metrics);
34
35  static const UINT SIZEOF_NONCLIENTMETRICS =
36      (base::win::GetVersion() >= base::win::VERSION_VISTA) ?
37      sizeof(NONCLIENTMETRICS) : NONCLIENTMETRICS_SIZE_PRE_VISTA;
38  metrics->cbSize = SIZEOF_NONCLIENTMETRICS;
39  const bool success = !!SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
40                                              SIZEOF_NONCLIENTMETRICS, metrics,
41                                              0);
42  DCHECK(success);
43}
44
45bool GetUserSidString(std::wstring* user_sid) {
46  // Get the current token.
47  HANDLE token = NULL;
48  if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token))
49    return false;
50  base::win::ScopedHandle token_scoped(token);
51
52  DWORD size = sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE;
53  scoped_array<BYTE> user_bytes(new BYTE[size]);
54  TOKEN_USER* user = reinterpret_cast<TOKEN_USER*>(user_bytes.get());
55
56  if (!::GetTokenInformation(token, TokenUser, user, size, &size))
57    return false;
58
59  if (!user->User.Sid)
60    return false;
61
62  // Convert the data to a string.
63  wchar_t* sid_string;
64  if (!::ConvertSidToStringSid(user->User.Sid, &sid_string))
65    return false;
66
67  *user_sid = sid_string;
68
69  ::LocalFree(sid_string);
70
71  return true;
72}
73
74bool IsShiftPressed() {
75  return (::GetKeyState(VK_SHIFT) & 0x8000) == 0x8000;
76}
77
78bool IsCtrlPressed() {
79  return (::GetKeyState(VK_CONTROL) & 0x8000) == 0x8000;
80}
81
82bool IsAltPressed() {
83  return (::GetKeyState(VK_MENU) & 0x8000) == 0x8000;
84}
85
86bool UserAccountControlIsEnabled() {
87  // This can be slow if Windows ends up going to disk.  Should watch this key
88  // for changes and only read it once, preferably on the file thread.
89  //   http://code.google.com/p/chromium/issues/detail?id=61644
90  base::ThreadRestrictions::ScopedAllowIO allow_io;
91
92  base::win::RegKey key(HKEY_LOCAL_MACHINE,
93      L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System",
94      KEY_READ);
95  DWORD uac_enabled;
96  if (key.ReadValueDW(L"EnableLUA", &uac_enabled) != ERROR_SUCCESS)
97    return true;
98  // Users can set the EnableLUA value to something arbitrary, like 2, which
99  // Vista will treat as UAC enabled, so we make sure it is not set to 0.
100  return (uac_enabled != 0);
101}
102
103bool SetAppIdForPropertyStore(IPropertyStore* property_store,
104                              const wchar_t* app_id) {
105  DCHECK(property_store);
106
107  // App id should be less than 128 chars and contain no space. And recommended
108  // format is CompanyName.ProductName[.SubProduct.ProductNumber].
109  // See http://msdn.microsoft.com/en-us/library/dd378459%28VS.85%29.aspx
110  DCHECK(lstrlen(app_id) < 128 && wcschr(app_id, L' ') == NULL);
111
112  PROPVARIANT property_value;
113  if (FAILED(InitPropVariantFromString(app_id, &property_value)))
114    return false;
115
116  HRESULT result = property_store->SetValue(PKEY_AppUserModel_ID,
117                                            property_value);
118  if (S_OK == result)
119    result = property_store->Commit();
120
121  PropVariantClear(&property_value);
122  return SUCCEEDED(result);
123}
124
125static const char16 kAutoRunKeyPath[] =
126    L"Software\\Microsoft\\Windows\\CurrentVersion\\Run";
127
128bool AddCommandToAutoRun(HKEY root_key, const string16& name,
129                         const string16& command) {
130  base::win::RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
131  return (autorun_key.WriteValue(name.c_str(), command.c_str()) ==
132      ERROR_SUCCESS);
133}
134
135bool RemoveCommandFromAutoRun(HKEY root_key, const string16& name) {
136  base::win::RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
137  return (autorun_key.DeleteValue(name.c_str()) == ERROR_SUCCESS);
138}
139
140bool ReadCommandFromAutoRun(HKEY root_key,
141                            const string16& name,
142                            string16* command) {
143  base::win::RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_QUERY_VALUE);
144  return (autorun_key.ReadValue(name.c_str(), command) == ERROR_SUCCESS);
145}
146
147}  // namespace win
148}  // namespace base
149
150#ifdef _MSC_VER
151//
152// If the ASSERT below fails, please install Visual Studio 2005 Service Pack 1.
153//
154extern char VisualStudio2005ServicePack1Detection[10];
155COMPILE_ASSERT(sizeof(&VisualStudio2005ServicePack1Detection) == sizeof(void*),
156               VS2005SP1Detect);
157//
158// Chrome requires at least Service Pack 1 for Visual Studio 2005.
159//
160#endif  // _MSC_VER
161
162#ifndef COPY_FILE_COPY_SYMLINK
163#error You must install the Windows 2008 or Vista Software Development Kit and \
164set it as your default include path to build this library. You can grab it by \
165searching for "download windows sdk 2008" in your favorite web search engine.  \
166Also make sure you register the SDK with Visual Studio, by selecting \
167"Integrate Windows SDK with Visual Studio 2005" from the Windows SDK \
168menu (see Start - All Programs - Microsoft Windows SDK - \
169Visual Studio Registration).
170#endif
171