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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "base/win/win_util.h"
#include <objbase.h>
#include <initguid.h>
#include <shobjidl.h>
#include <tchar.h>
#include <winternl.h>
#include <aclapi.h>
#include <cfgmgr32.h>
#include <inspectable.h>
#include <lm.h>
#include <mdmregistration.h>
#include <ntstatus.h>
#include <powrprof.h>
#include <propkey.h>
#include <psapi.h>
#include <roapi.h>
#include <sddl.h>
#include <setupapi.h>
#include <shellscalingapi.h>
#include <signal.h>
#include <stddef.h>
#include <stdlib.h>
#include <strsafe.h>
#include <tpcshrd.h>
#include <uiviewsettingsinterop.h>
#include <wbemidl.h>
#include <windows.system.profile.systemmanufacturers.h>
#include <windows.ui.viewmanagement.h>
#include <winstring.h>
#include <wrl/client.h>
#include <wrl/wrappers/corewrappers.h>
#include <limits>
#include <memory>
#include <optional>
#include <string_view>
#include <utility>
#include "base/base_switches.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/containers/heap_array.h"
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/notreached.h"
#include "base/scoped_native_library.h"
#include "base/strings/string_util.h"
#include "base/strings/string_util_win.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/threading/scoped_blocking_call.h"
#include "base/threading/scoped_thread_priority.h"
#include "base/threading/thread_restrictions.h"
#include "base/timer/elapsed_timer.h"
#include "base/win/access_token.h"
#include "base/win/com_init_util.h"
#include "base/win/core_winrt_util.h"
#include "base/win/hstring_reference.h"
#include "base/win/propvarutil.h"
#include "base/win/registry.h"
#include "base/win/scoped_bstr.h"
#include "base/win/scoped_co_mem.h"
#include "base/win/scoped_handle.h"
#include "base/win/scoped_hstring.h"
#include "base/win/scoped_propvariant.h"
#include "base/win/scoped_safearray.h"
#include "base/win/scoped_variant.h"
#include "base/win/shlwapi.h"
#include "base/win/static_constants.h"
#include "base/win/windows_version.h"
#include "base/win/wmi.h"
namespace base {
namespace win {
namespace {
using QueryKeyFunction =
ScopedDeviceConvertibilityStateForTesting::QueryFunction;
// Sets the value of |property_key| to |property_value| in |property_store|.
bool SetPropVariantValueForPropertyStore(
IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const ScopedPropVariant& property_value) {
DCHECK(property_store);
HRESULT result = property_store->SetValue(property_key, property_value.get());
if (result == S_OK) {
result = property_store->Commit();
}
if (SUCCEEDED(result)) {
return true;
}
#if DCHECK_IS_ON()
if (HRESULT_FACILITY(result) == FACILITY_WIN32) {
::SetLastError(HRESULT_CODE(result));
}
// See third_party/perl/c/i686-w64-mingw32/include/propkey.h for GUID and
// PID definitions.
DPLOG(ERROR) << "Failed to set property with GUID "
<< WStringFromGUID(property_key.fmtid) << " PID "
<< property_key.pid;
#endif
return false;
}
void __cdecl ForceCrashOnSigAbort(int) {
*((volatile int*)nullptr) = 0x1337;
}
// Returns the current platform role. We use the PowerDeterminePlatformRoleEx
// API for that.
POWER_PLATFORM_ROLE GetPlatformRole() {
return PowerDeterminePlatformRoleEx(POWER_PLATFORM_ROLE_V2);
}
// Enable V2 per-monitor high-DPI support for the process. This will cause
// Windows to scale dialogs, comctl32 controls, context menus, and non-client
// area owned by this process on a per-monitor basis. If per-monitor V2 is not
// available (i.e., prior to Windows 10 1703) or fails, returns false.
// https://docs.microsoft.com/en-us/windows/desktop/hidpi/dpi-awareness-context
bool EnablePerMonitorV2() {
if (!IsUser32AndGdi32Available()) {
return false;
}
static const auto set_process_dpi_awareness_context_func =
reinterpret_cast<decltype(&::SetProcessDpiAwarenessContext)>(
GetUser32FunctionPointer("SetProcessDpiAwarenessContext"));
if (set_process_dpi_awareness_context_func) {
return set_process_dpi_awareness_context_func(
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
}
DCHECK_LT(GetVersion(), Version::WIN10_RS2)
<< "SetProcessDpiAwarenessContext should be available on all platforms"
" >= Windows 10 Redstone 2";
return false;
}
bool* GetDomainEnrollmentStateStorage() {
static bool state = IsOS(OS_DOMAINMEMBER);
return &state;
}
bool* GetRegisteredWithManagementStateStorage() {
static bool state = [] {
// Mitigate the issues caused by loading DLLs on a background thread
// (http://crbug/973868).
SCOPED_MAY_LOAD_LIBRARY_AT_BACKGROUND_PRIORITY();
ScopedNativeLibrary library(
FilePath(FILE_PATH_LITERAL("MDMRegistration.dll")));
if (!library.is_valid()) {
return false;
}
using IsDeviceRegisteredWithManagementFunction =
decltype(&::IsDeviceRegisteredWithManagement);
IsDeviceRegisteredWithManagementFunction
is_device_registered_with_management_function =
reinterpret_cast<IsDeviceRegisteredWithManagementFunction>(
library.GetFunctionPointer("IsDeviceRegisteredWithManagement"));
if (!is_device_registered_with_management_function) {
return false;
}
BOOL is_managed = FALSE;
HRESULT hr =
is_device_registered_with_management_function(&is_managed, 0, nullptr);
return SUCCEEDED(hr) && is_managed;
}();
return &state;
}
// TODO (crbug/1300219): return a DSREG_JOIN_TYPE* instead of bool*.
bool* GetAzureADJoinStateStorage() {
static bool state = [] {
base::ElapsedTimer timer;
// Mitigate the issues caused by loading DLLs on a background thread
// (http://crbug/973868).
SCOPED_MAY_LOAD_LIBRARY_AT_BACKGROUND_PRIORITY();
ScopedNativeLibrary netapi32(
base::LoadSystemLibrary(FILE_PATH_LITERAL("netapi32.dll")));
if (!netapi32.is_valid()) {
return false;
}
const auto net_get_aad_join_information_function =
reinterpret_cast<decltype(&::NetGetAadJoinInformation)>(
netapi32.GetFunctionPointer("NetGetAadJoinInformation"));
if (!net_get_aad_join_information_function) {
return false;
}
const auto net_free_aad_join_information_function =
reinterpret_cast<decltype(&::NetFreeAadJoinInformation)>(
netapi32.GetFunctionPointer("NetFreeAadJoinInformation"));
DPCHECK(net_free_aad_join_information_function);
DSREG_JOIN_INFO* join_info = nullptr;
HRESULT hr = net_get_aad_join_information_function(/*pcszTenantId=*/nullptr,
&join_info);
const bool is_aad_joined = SUCCEEDED(hr) && join_info;
if (join_info) {
net_free_aad_join_information_function(join_info);
}
base::UmaHistogramTimes("EnterpriseCheck.AzureADJoinStatusCheckTime",
timer.Elapsed());
return is_aad_joined;
}();
return &state;
}
NativeLibrary PinUser32Internal(NativeLibraryLoadError* error) {
static NativeLibraryLoadError load_error;
static const NativeLibrary user32_module =
PinSystemLibrary(FILE_PATH_LITERAL("user32.dll"), &load_error);
if (!user32_module && error) {
error->code = load_error.code;
}
return user32_module;
}
// Returns true if the internal display, if any, is on and the device is not in
// extend mode. This allows for the correct posture decision for devices that
// are docked but either closed or in second-screen only projection mode.
bool IsValidTabletDisplayConfig() {
uint32_t path_count;
uint32_t mode_count;
// All paths is expensive, therefore check only active paths.
uint32_t flags = QDC_ONLY_ACTIVE_PATHS | QDC_VIRTUAL_MODE_AWARE;
// Get the buffer sizes used for `QueryDisplayConfig()`.
// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-querydisplayconfig
if (::GetDisplayConfigBufferSizes(flags, &path_count, &mode_count) !=
ERROR_SUCCESS) {
// Default safely to Desktop in the unlikely case these calls fail.
return false;
}
std::vector<DISPLAYCONFIG_PATH_INFO> paths(path_count);
std::vector<DISPLAYCONFIG_MODE_INFO> modes(mode_count);
// Read all active paths.
if (::QueryDisplayConfig(flags, &path_count, paths.data(), &mode_count,
modes.data(), nullptr) != ERROR_SUCCESS) {
return false;
}
// Resize buffers to exact size from `QueryDisplayConfig()`.
paths.resize(path_count);
modes.resize(mode_count);
// For each active path, check if the target points to an internal
// display and there are no extended displays.
// https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ne-wingdi-displayconfig_video_output_technology
bool internal_monitor_active = false;
bool has_extended_monitor = false;
for (auto& path : paths) {
if (path.sourceInfo.sourceModeInfoIdx ==
DISPLAYCONFIG_PATH_SOURCE_MODE_IDX_INVALID) {
// Safely default to desktop mode if the status of an extended monitor can
// not be determined. This prevents the browser from going into tablet
// mode if for any reason the user is using a combination of extended and
// duplicate displays.
return false;
}
switch (path.targetInfo.outputTechnology) {
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL:
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED:
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED:
internal_monitor_active = true;
break;
default:
internal_monitor_active = false;
}
auto& mode = modes[path.sourceInfo.sourceModeInfoIdx];
POINTL pos = mode.sourceMode.position;
if ((pos.x != 0) || (pos.y != 0)) {
has_extended_monitor = true;
break;
}
}
return internal_monitor_active && !has_extended_monitor;
}
// Check attached keyboards and populate reason string if we find ACPI\* or
// HID\VID* keyboards.
void SetKeyboardPresentOnDeviceReason(std::ostringstream& reason) {
static constexpr GUID kKeyboardClassGuid = {
0x4D36E96B,
0xE325,
0x11CE,
{0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18}};
// Query for all the keyboard devices.
HDEVINFO device_info = ::SetupDiGetClassDevs(&kKeyboardClassGuid, nullptr,
nullptr, DIGCF_PRESENT);
if (device_info == INVALID_HANDLE_VALUE) {
reason << "No keyboard info\n";
return;
}
// Enumerate all keyboards and look for ACPI\PNP and HID\VID devices. If
// the count is more than 1 we assume that a keyboard is present. This is
// under the assumption that there will always be one keyboard device.
for (DWORD i = 0;; ++i) {
SP_DEVINFO_DATA device_info_data = {};
device_info_data.cbSize = sizeof(device_info_data);
if (!::SetupDiEnumDeviceInfo(device_info, i, &device_info_data)) {
break;
}
// Get the device ID.
wchar_t device_id[MAX_DEVICE_ID_LEN];
CONFIGRET status = ::CM_Get_Device_ID(device_info_data.DevInst, device_id,
ARRAYSIZE(device_id), 0);
if (status == CR_SUCCESS) {
// To reduce the scope of the hack we only look for ACPI and HID\\VID
// prefixes in the keyboard device ids.
if (StartsWith(device_id, L"ACPI", CompareCase::INSENSITIVE_ASCII) ||
StartsWith(device_id, L"HID\\VID", CompareCase::INSENSITIVE_ASCII)) {
reason << "device: ";
reason << WideToUTF8(device_id);
reason << '\n';
}
}
}
}
bool IsWindows11TabletMode() {
// Check if the device is convertible. Then check if the device is being
// used as a tablet. Finally, check whether the device is in a valid
// tablet display configuration.
return QueryDeviceConvertibility() &&
IsDeviceUsedAsATablet(/*reason=*/nullptr) &&
IsValidTabletDisplayConfig();
}
// Helper for getting the process power throttling state.
ProcessPowerState GetProcessPowerThrottlingState(HANDLE process, ULONG flag) {
// Get the current explicitly set state of the process power throttling.
PROCESS_POWER_THROTTLING_STATE power_throttling{
.Version = PROCESS_POWER_THROTTLING_CURRENT_VERSION};
if (!::GetProcessInformation(process, ProcessPowerThrottling,
&power_throttling, sizeof(power_throttling))) {
return ProcessPowerState::kUnset;
}
if (power_throttling.ControlMask & flag) {
if (power_throttling.StateMask & flag) {
return ProcessPowerState::kEnabled;
}
return ProcessPowerState::kDisabled;
}
return ProcessPowerState::kUnset;
}
// Helper for setting the process power throttling state.
bool SetProcessPowerThrottlingState(HANDLE process,
ULONG flag,
ProcessPowerState state) {
// Process power throttling is a Windows 11 feature, but before 22H2
// there was no way to query the current state using GetProcessInformation.
// Getting the current state is needed in Process::GetPriority to determine
// the process priority accurately, so calls to set the state are blocked
// before that release.
if (GetVersion() < Version::WIN11_22H2) {
return false;
}
PROCESS_POWER_THROTTLING_STATE power_throttling{
.Version = PROCESS_POWER_THROTTLING_CURRENT_VERSION};
// Get the current state of the process power throttling so we do not clobber
// other previously set flags.
if (!::GetProcessInformation(process, ProcessPowerThrottling,
&power_throttling, sizeof(power_throttling))) {
return false;
}
switch (state) {
case ProcessPowerState::kUnset:
// Clear the specified flag. This results in the OS determining the
// throttling state.
power_throttling.ControlMask &= ~flag;
power_throttling.StateMask &= ~flag;
break;
case ProcessPowerState::kDisabled:
// Explicitly disable the specified flag.
power_throttling.ControlMask |= flag;
power_throttling.StateMask &= ~flag;
break;
case ProcessPowerState::kEnabled:
// Explicitly enable the specified flag.
power_throttling.ControlMask |= flag;
power_throttling.StateMask |= flag;
break;
}
return ::SetProcessInformation(process, ProcessPowerThrottling,
&power_throttling, sizeof(power_throttling));
}
} // namespace
// The device convertibility functions below return references to cached data
// to allow for complete test scenarios. See:
// ScopedDeviceConvertibilityStateForTesting.
//
// Returns a reference to a cached value computed on first-use that is true only
// if the device is a tablet, convertible, or detachable according to
// RtlGetDeviceFamilyInfoEnum. Looks for the following values: Tablet(2),
// Convertible(5), or Detachable(6).
// https://learn.microsoft.com/en-us/windows-hardware/customize/desktop/unattend/microsoft-windows-deployment-deviceform
bool& IsDeviceFormConvertible() {
static bool is_convertible = [] {
DWORD deviceForm = DEVICEFAMILYDEVICEFORM_UNKNOWN;
using lpfnRtlGetDeviceFamilyInfo =
VOID(WINAPI*)(ULONGLONG*, DWORD*, DWORD*);
static const lpfnRtlGetDeviceFamilyInfo get_device_family_info_fn =
reinterpret_cast<lpfnRtlGetDeviceFamilyInfo>(GetProcAddress(
::GetModuleHandle(L"ntdll.dll"), "RtlGetDeviceFamilyInfoEnum"));
PCHECK(get_device_family_info_fn);
get_device_family_info_fn(/*pullUAPInfo=*/nullptr,
/*pulDeviceFamily=*/nullptr, &deviceForm);
// Is not reliable for all devices. Surface Book 3 for instance has Chassis
// Type 9 (Laptop) and DeviceForm 0 (Unknown).
return (deviceForm == DEVICEFAMILYDEVICEFORM_TABLET) ||
(deviceForm == DEVICEFAMILYDEVICEFORM_CONVERTIBLE) ||
(deviceForm == DEVICEFAMILYDEVICEFORM_DETACHABLE);
}();
return is_convertible;
}
// Returns a reference to a cached boolean that is true if the device hardware
// is convertible. The value is determined via a WMI query for
// Win32_SystemEnclosure. This should only be executed for a small amount of
// devices that don't have ConvertibleChassis or ConvertibilityEnabled keys set.
// https://learn.microsoft.com/en-us/windows/win32/cimwin32prov/win32-systemenclosure
bool& IsChassisConvertible() {
static bool chassis_convertible = [] {
ScopedBlockingCall scoped_blocking_call(FROM_HERE, BlockingType::MAY_BLOCK);
AssertComInitialized();
constexpr std::wstring_view kQuery =
L"select ChassisTypes from Win32_SystemEnclosure";
Microsoft::WRL::ComPtr<IEnumWbemClassObject> enumerator;
if (RunWmiQuery(kCimV2ServerName, std::wstring(kQuery), &enumerator)
.has_value()) {
return false;
}
ULONG obj_count = 0;
Microsoft::WRL::ComPtr<IWbemClassObject> info;
HRESULT hr = E_FAIL;
hr = enumerator->Next(25, 1, &info, &obj_count);
if (FAILED(hr)) {
return false;
}
// The accepted values for a convertible device are Tablet (30), Convertible
// (31), and Detachable (32).
enum ChassisType : int32_t {
kUnknownChassisType = 2,
kTabletChassisType = 30,
kConvertibleChassisType = 31,
kDetachableChassisType = 32,
};
int32_t chassis_type_id = kUnknownChassisType;
if (obj_count >= 1) {
ScopedVariant chassisTypeVariant;
hr = info->Get(L"ChassisTypes", 0, chassisTypeVariant.Receive(), nullptr,
nullptr);
if (FAILED(hr)) {
return false;
}
// Although chassisType is documented as uint16[], the type in reality is
// a 32bit integer array.
if (chassisTypeVariant.type() == (VT_ARRAY | VT_I4)) {
ScopedSafearray safearray(chassisTypeVariant.Release().parray);
auto lock_scope = safearray.CreateLockScope<VT_I4>();
if (!lock_scope) {
return false;
}
chassis_type_id = (*lock_scope)[0];
}
}
return (chassis_type_id == kTabletChassisType) ||
(chassis_type_id == kConvertibleChassisType) ||
(chassis_type_id == kDetachableChassisType);
}();
return chassis_convertible;
}
// Returns a reference to a cached boolean optional. If a value exists, it means
// that the queried registry key, ConvertibilityEnabled, exists. Used by Surface
// for devices that can't set deviceForm or ChassisType. The RegKey need not
// exist, but if it does it will override other checks.
std::optional<bool>& GetConvertibilityEnabledOverride() {
static std::optional<bool> convertibility_enabled =
[]() -> std::optional<bool> {
DWORD data;
base::win::RegKey key(
HKEY_LOCAL_MACHINE,
L"System\\CurrentControlSet\\Control\\PriorityControl",
KEY_QUERY_VALUE);
return key.ReadValueDW(L"ConvertibilityEnabled", &data) == ERROR_SUCCESS
? std::make_optional(data != 0)
: std::nullopt;
}();
return convertibility_enabled;
}
// Returns a reference to a cached boolean optional. If a value exists, it means
// that the queried registry key, ConvertibleChassis, exists. Windows may cache
// the results of convertible chassis queries, preventing the need for running
// the expensive WMI query. This should always be checked prior to running
// `IsChassisConvertible()`.
std::optional<bool>& GetConvertibleChassisKeyValue() {
static std::optional<bool> convertible_chassis = []() -> std::optional<bool> {
DWORD data;
base::win::RegKey key(HKEY_CURRENT_USER,
L"SOFTWARE\\Microsoft\\TabletTip\\ConvertibleChassis",
KEY_QUERY_VALUE);
return key.ReadValueDW(L"ConvertibleChassis", &data) == ERROR_SUCCESS
? std::make_optional(data != 0)
: std::nullopt;
}();
return convertible_chassis;
}
// Returns a function pointer that points to the lambda function that
// tracks if the device's convertible slate mode state has ever changed, which
// would indicate that proper GPIO drivers are available for a convertible
// machine. A pointer is used so that the function at the address can be
// replaced for testing purposes.
QueryKeyFunction& HasCSMStateChanged() {
static QueryKeyFunction state = []() {
DWORD data;
base::win::RegKey key(
HKEY_CURRENT_USER,
L"SOFTWARE\\Microsoft\\TabletTip\\ConvertibleSlateModeChanged",
KEY_QUERY_VALUE);
bool value_exists =
key.ReadValueDW(L"ConvertibleSlateModeChanged", &data) == ERROR_SUCCESS;
return (value_exists && data != 0);
};
return state;
}
void IsDeviceInTabletMode(HWND hwnd, OnceCallback<void(bool)> callback) {
if (GetVersion() >= Version::WIN11) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
base::BindOnce(&IsWindows11TabletMode), std::move(callback));
return;
}
SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, BindOnce(std::move(callback), IsWindows10TabletMode(hwnd)));
}
bool QueryDeviceConvertibility() {
// Ensure this function runs on a thread that allows blocking in the event
// that the WMI query in the chassis convertibility check is executed.
AssertBlockingAllowed();
if (const auto& convertibility_enabled = GetConvertibilityEnabledOverride()) {
return *convertibility_enabled;
}
if (const auto& convertible_chassis_key = GetConvertibleChassisKeyValue()) {
return *convertible_chassis_key;
}
if (IsDeviceFormConvertible() || IsChassisConvertible()) {
return true;
}
return (HasCSMStateChanged())();
}
// Uses the Windows 10 WRL API's to query the current system state. The APIs
// used in the function below are supported in Win32 apps as per msdn.
// It looks like the API implementation is buggy at least on Surface 4 causing
// it to always return UserInteractionMode_Touch which as per documentation
// indicates tablet mode.
bool IsWindows10TabletMode(HWND hwnd) {
ScopedHString view_settings_guid = ScopedHString::Create(
RuntimeClass_Windows_UI_ViewManagement_UIViewSettings);
Microsoft::WRL::ComPtr<IUIViewSettingsInterop> view_settings_interop;
HRESULT hr = ::RoGetActivationFactory(view_settings_guid.get(),
IID_PPV_ARGS(&view_settings_interop));
if (FAILED(hr)) {
return false;
}
Microsoft::WRL::ComPtr<ABI::Windows::UI::ViewManagement::IUIViewSettings>
view_settings;
hr = view_settings_interop->GetForWindow(hwnd, IID_PPV_ARGS(&view_settings));
if (FAILED(hr)) {
return false;
}
ABI::Windows::UI::ViewManagement::UserInteractionMode mode =
ABI::Windows::UI::ViewManagement::UserInteractionMode_Mouse;
hr = view_settings->get_UserInteractionMode(&mode);
if (FAILED(hr)) {
return false;
}
return mode == ABI::Windows::UI::ViewManagement::UserInteractionMode_Touch;
}
void IsDeviceSlateWithKeyboard(HWND hwnd,
OnceCallback<void(bool, std::string)> callback) {
std::ostringstream reason;
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableUsbKeyboardDetect)) {
reason << "Detection disabled";
SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, BindOnce(std::move(callback), /*keyboard_present=*/false,
std::move(reason).str()));
return;
}
// If no touch screen detected, assume keyboard attached.
// TODO(crbug.com/383267933) If the device is mouse only with no touch screen,
// this will determine that the device has a keyboard.
if ((GetSystemMetrics(SM_DIGITIZER) & NID_INTEGRATED_TOUCH) !=
NID_INTEGRATED_TOUCH) {
reason << "NID_INTEGRATED_TOUCH\n";
}
// Once the async call to IsDeviceInTabletMode is complete, run
// `on_tablet_mode_determined` to populate the `reason` string if present and
// run the `callback`.
auto on_tablet_mode_determined =
[](OnceCallback<void(bool, std::string)> keyboard_callback,
std::ostringstream reason, bool is_tablet_mode) {
if (is_tablet_mode) {
reason << "Tablet device.\n";
std::move(keyboard_callback)
.Run(/*keyboard_present=*/false, std::move(reason).str());
return;
}
reason << "Not a tablet device.\n";
SetKeyboardPresentOnDeviceReason(reason);
std::move(keyboard_callback)
.Run(/*keyboard_present=*/true, std::move(reason).str());
};
IsDeviceInTabletMode(hwnd,
base::BindOnce(std::move(on_tablet_mode_determined),
std::move(callback), std::move(reason)));
}
static bool g_crash_on_process_detach = false;
bool GetUserSidString(std::wstring* user_sid) {
std::optional<AccessToken> token = AccessToken::FromCurrentProcess();
if (!token) {
return false;
}
std::optional<std::wstring> sid_string = token->User().ToSddlString();
if (!sid_string) {
return false;
}
*user_sid = *sid_string;
return true;
}
class ScopedAllowBlockingForUserAccountControl : public ScopedAllowBlocking {};
bool UserAccountControlIsEnabled() {
// This can be slow if Windows ends up going to disk. Should watch this key
// for changes and only read it once, preferably on the file thread.
// http://code.google.com/p/chromium/issues/detail?id=61644
ScopedAllowBlockingForUserAccountControl allow_blocking;
RegKey key(HKEY_LOCAL_MACHINE,
L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System",
KEY_READ);
DWORD uac_enabled;
if (key.ReadValueDW(L"EnableLUA", &uac_enabled) != ERROR_SUCCESS) {
return true;
}
// Users can set the EnableLUA value to something arbitrary, like 2, which
// Vista will treat as UAC enabled, so we make sure it is not set to 0.
return (uac_enabled != 0);
}
bool UserAccountIsUnnecessarilyElevated() {
// Check the process token to tell us that it's:
// * Elevated
// * UAC is enabled
// * It's not an account that always runs elevated even with UAC enabled
// The last bullet happens on built-in Admin *without* the "run BA filtered"
// policy set.
DWORD size;
TOKEN_ELEVATION_TYPE elevation_type;
return GetTokenInformation(GetCurrentProcessToken(), TokenElevationType,
&elevation_type, sizeof(elevation_type), &size) &&
elevation_type == TokenElevationTypeFull;
}
bool SetBooleanValueForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
bool property_bool_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromBoolean(property_bool_value,
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store, property_key,
property_value);
}
bool SetStringValueForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const wchar_t* property_string_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromString(property_string_value,
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store, property_key,
property_value);
}
bool SetClsidForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const CLSID& property_clsid_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromCLSID(property_clsid_value,
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store, property_key,
property_value);
}
bool SetAppIdForPropertyStore(IPropertyStore* property_store,
const wchar_t* app_id) {
// App id should be less than 128 chars and contain no space. And recommended
// format is CompanyName.ProductName[.SubProduct.ProductNumber].
// See
// https://docs.microsoft.com/en-us/windows/win32/shell/appids#how-to-form-an-application-defined-appusermodelid
DCHECK_LT(lstrlen(app_id), 128);
DCHECK_EQ(wcschr(app_id, L' '), nullptr);
return SetStringValueForPropertyStore(property_store, PKEY_AppUserModel_ID,
app_id);
}
static const wchar_t kAutoRunKeyPath[] =
L"Software\\Microsoft\\Windows\\CurrentVersion\\Run";
bool AddCommandToAutoRun(HKEY root_key,
const std::wstring& name,
const std::wstring& command) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
return (autorun_key.WriteValue(name.c_str(), command.c_str()) ==
ERROR_SUCCESS);
}
bool RemoveCommandFromAutoRun(HKEY root_key, const std::wstring& name) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
return (autorun_key.DeleteValue(name.c_str()) == ERROR_SUCCESS);
}
bool ReadCommandFromAutoRun(HKEY root_key,
const std::wstring& name,
std::wstring* command) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_QUERY_VALUE);
return (autorun_key.ReadValue(name.c_str(), command) == ERROR_SUCCESS);
}
void SetShouldCrashOnProcessDetach(bool crash) {
g_crash_on_process_detach = crash;
}
bool ShouldCrashOnProcessDetach() {
return g_crash_on_process_detach;
}
void SetAbortBehaviorForCrashReporting() {
// Prevent CRT's abort code from prompting a dialog or trying to "report" it.
// Disabling the _CALL_REPORTFAULT behavior is important since otherwise it
// has the sideffect of clearing our exception filter, which means we
// don't get any crash.
_set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
// Set a SIGABRT handler for good measure. We will crash even if the default
// is left in place, however this allows us to crash earlier. And it also
// lets us crash in response to code which might directly call raise(SIGABRT)
signal(SIGABRT, ForceCrashOnSigAbort);
// Also call the setters in the UCRT dll if it is loaded into the process.
// This will handle aborts originating from other modules that dynamically
// load UCRT.
HMODULE ucrtbase = ::GetModuleHandle(L"ucrtbase.dll");
if (!ucrtbase) {
return;
}
const auto ucrtbase_signal_fn = reinterpret_cast<decltype(&::signal)>(
::GetProcAddress(ucrtbase, "signal"));
if (ucrtbase_signal_fn) {
ucrtbase_signal_fn(SIGABRT, ForceCrashOnSigAbort);
}
}
// This method is used to set the right interactions media queries,
// see https://drafts.csswg.org/mediaqueries-4/#mf-interaction. It doesn't
// check the Windows 10 tablet mode because it doesn't reflect the actual
// input configuration of the device and can be manually triggered by the user
// independently from the hardware state.
bool IsDeviceUsedAsATablet(std::string* reason) {
// Once this is set, it shouldn't be overridden, and it should be the ultimate
// return value, so that this method returns the same result whether or not
// reason is NULL.
std::optional<bool> ret;
if (GetSystemMetrics(SM_MAXIMUMTOUCHES) == 0) {
if (!reason) {
return false;
}
*reason += "Device does not support touch.\n";
ret = false;
}
// If the device is docked, the user is treating the device as a PC.
if (GetSystemMetrics(SM_SYSTEMDOCKED) != 0) {
if (!reason) {
return false;
}
*reason += "SM_SYSTEMDOCKED\n";
if (!ret.has_value()) {
ret = false;
}
}
// If the device is not supporting rotation, it's unlikely to be a tablet,
// a convertible or a detachable.
// See
// https://msdn.microsoft.com/en-us/library/windows/desktop/dn629263(v=vs.85).aspx
using GetAutoRotationStateType = decltype(GetAutoRotationState)*;
static const auto get_auto_rotation_state_func =
reinterpret_cast<GetAutoRotationStateType>(
GetUser32FunctionPointer("GetAutoRotationState"));
if (get_auto_rotation_state_func) {
AR_STATE rotation_state = AR_ENABLED;
if (get_auto_rotation_state_func(&rotation_state) &&
(rotation_state & (AR_NOT_SUPPORTED | AR_LAPTOP | AR_NOSENSOR)) != 0) {
return ret.value_or(false);
}
}
// PlatformRoleSlate was added in Windows 8+.
POWER_PLATFORM_ROLE role = GetPlatformRole();
bool is_tablet = false;
if (role == PlatformRoleMobile || role == PlatformRoleSlate) {
is_tablet = !GetSystemMetrics(SM_CONVERTIBLESLATEMODE);
if (!is_tablet) {
if (!reason) {
return false;
}
*reason += "Not in slate mode.\n";
if (!ret.has_value()) {
ret = false;
}
} else if (reason) {
*reason += (role == PlatformRoleMobile) ? "PlatformRoleMobile\n"
: "PlatformRoleSlate\n";
}
} else if (reason) {
*reason += "Device role is not mobile or slate.\n";
}
return ret.value_or(is_tablet);
}
bool IsEnrolledToDomain() {
return *GetDomainEnrollmentStateStorage();
}
bool IsDeviceRegisteredWithManagement() {
// GetRegisteredWithManagementStateStorage() can be true for devices running
// the Home sku, however the Home sku does not allow for management of the web
// browser. As such, we automatically exclude devices running the Home sku.
if (OSInfo::GetInstance()->version_type() == SUITE_HOME) {
return false;
}
return *GetRegisteredWithManagementStateStorage();
}
bool IsJoinedToAzureAD() {
return *GetAzureADJoinStateStorage();
}
bool IsUser32AndGdi32Available() {
static const bool is_user32_and_gdi32_available = [] {
// If win32k syscalls aren't disabled, then user32 and gdi32 are available.
PROCESS_MITIGATION_SYSTEM_CALL_DISABLE_POLICY policy = {};
if (::GetProcessMitigationPolicy(GetCurrentProcess(),
ProcessSystemCallDisablePolicy, &policy,
sizeof(policy))) {
return policy.DisallowWin32kSystemCalls == 0;
}
return true;
}();
return is_user32_and_gdi32_available;
}
bool GetLoadedModulesSnapshot(HANDLE process, std::vector<HMODULE>* snapshot) {
DCHECK(snapshot);
DCHECK_EQ(0u, snapshot->size());
snapshot->resize(128);
// We will retry at least once after first determining |bytes_required|. If
// the list of modules changes after we receive |bytes_required| we may retry
// more than once.
int retries_remaining = 5;
do {
DWORD bytes_required = 0;
// EnumProcessModules returns 'success' even if the buffer size is too
// small.
DCHECK_GE(std::numeric_limits<DWORD>::max(),
snapshot->size() * sizeof(HMODULE));
if (!::EnumProcessModules(
process, &(*snapshot)[0],
static_cast<DWORD>(snapshot->size() * sizeof(HMODULE)),
&bytes_required)) {
DPLOG(ERROR) << "::EnumProcessModules failed.";
return false;
}
DCHECK_EQ(0u, bytes_required % sizeof(HMODULE));
size_t num_modules = bytes_required / sizeof(HMODULE);
if (num_modules <= snapshot->size()) {
// Buffer size was too big, presumably because a module was unloaded.
snapshot->erase(snapshot->begin() + static_cast<ptrdiff_t>(num_modules),
snapshot->end());
return true;
}
if (num_modules == 0) {
DLOG(ERROR) << "Can't determine the module list size.";
return false;
}
// Buffer size was too small. Try again with a larger buffer. A little
// more room is given to avoid multiple expensive calls to
// ::EnumProcessModules() just because one module has been added.
snapshot->resize(num_modules + 8, nullptr);
} while (--retries_remaining);
DLOG(ERROR) << "Failed to enumerate modules.";
return false;
}
void EnableFlicks(HWND hwnd) {
::RemoveProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY);
}
void DisableFlicks(HWND hwnd) {
::SetProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY,
reinterpret_cast<HANDLE>(TABLET_DISABLE_FLICKS |
TABLET_DISABLE_FLICKFALLBACKKEYS));
}
void EnableHighDPISupport() {
if (!IsUser32AndGdi32Available()) {
return;
}
// Enable per-monitor V2 if it is available (Win10 1703 or later).
if (EnablePerMonitorV2()) {
return;
}
// Fall back to per-monitor DPI for older versions of Win10.
PROCESS_DPI_AWARENESS process_dpi_awareness = PROCESS_PER_MONITOR_DPI_AWARE;
if (!::SetProcessDpiAwareness(process_dpi_awareness)) {
// For windows versions where SetProcessDpiAwareness fails, try its
// predecessor.
BOOL result = ::SetProcessDPIAware();
DCHECK(result) << "SetProcessDPIAware failed.";
}
}
std::wstring WStringFromGUID(const ::GUID& rguid) {
// This constant counts the number of characters in the formatted string,
// including the null termination character.
constexpr int kGuidStringCharacters =
1 + 8 + 1 + 4 + 1 + 4 + 1 + 4 + 1 + 12 + 1 + 1;
wchar_t guid_string[kGuidStringCharacters];
CHECK(SUCCEEDED(StringCchPrintfW(
guid_string, kGuidStringCharacters,
L"{%08lX-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}", rguid.Data1,
rguid.Data2, rguid.Data3, rguid.Data4[0], rguid.Data4[1], rguid.Data4[2],
rguid.Data4[3], rguid.Data4[4], rguid.Data4[5], rguid.Data4[6],
rguid.Data4[7])));
return std::wstring(guid_string, kGuidStringCharacters - 1);
}
bool PinUser32(NativeLibraryLoadError* error) {
return PinUser32Internal(error) != nullptr;
}
void* GetUser32FunctionPointer(const char* function_name,
NativeLibraryLoadError* error) {
NativeLibrary user32_module = PinUser32Internal(error);
if (user32_module) {
return GetFunctionPointerFromNativeLibrary(user32_module, function_name);
}
return nullptr;
}
std::wstring GetWindowObjectName(HANDLE handle) {
// Get the size of the name.
std::wstring object_name;
DWORD size = 0;
::GetUserObjectInformation(handle, UOI_NAME, nullptr, 0, &size);
if (!size) {
DPCHECK(false);
return object_name;
}
LOG_ASSERT(size % sizeof(wchar_t) == 0u);
// Query the name of the object.
if (!::GetUserObjectInformation(
handle, UOI_NAME, WriteInto(&object_name, size / sizeof(wchar_t)),
size, &size)) {
DPCHECK(false);
}
return object_name;
}
bool GetPointerDevice(HANDLE device, POINTER_DEVICE_INFO& result) {
return ::GetPointerDevice(device, &result);
}
std::optional<std::vector<POINTER_DEVICE_INFO>> GetPointerDevices() {
uint32_t device_count;
if (!::GetPointerDevices(&device_count, nullptr)) {
return std::nullopt;
}
std::vector<POINTER_DEVICE_INFO> pointer_devices(device_count);
if (!::GetPointerDevices(&device_count, pointer_devices.data())) {
return std::nullopt;
}
return pointer_devices;
}
bool RegisterPointerDeviceNotifications(HWND hwnd,
bool notify_proximity_changes) {
return ::RegisterPointerDeviceNotifications(hwnd, notify_proximity_changes);
}
bool IsRunningUnderDesktopName(std::wstring_view desktop_name) {
HDESK thread_desktop = ::GetThreadDesktop(::GetCurrentThreadId());
if (!thread_desktop) {
return false;
}
std::wstring current_desktop_name = GetWindowObjectName(thread_desktop);
return EqualsCaseInsensitiveASCII(AsStringPiece16(current_desktop_name),
AsStringPiece16(desktop_name));
}
// This method is used to detect whether current session is a remote session.
// See:
// https://docs.microsoft.com/en-us/windows/desktop/TermServ/detecting-the-terminal-services-environment
bool IsCurrentSessionRemote() {
if (::GetSystemMetrics(SM_REMOTESESSION)) {
return true;
}
DWORD current_session_id = 0;
if (!::ProcessIdToSessionId(::GetCurrentProcessId(), ¤t_session_id)) {
return false;
}
static constexpr wchar_t kRdpSettingsKeyName[] =
L"SYSTEM\\CurrentControlSet\\Control\\Terminal Server";
RegKey key(HKEY_LOCAL_MACHINE, kRdpSettingsKeyName, KEY_READ);
if (!key.Valid()) {
return false;
}
static constexpr wchar_t kGlassSessionIdValueName[] = L"GlassSessionId";
DWORD glass_session_id = 0;
if (key.ReadValueDW(kGlassSessionIdValueName, &glass_session_id) !=
ERROR_SUCCESS) {
return false;
}
return current_session_id != glass_session_id;
}
bool IsAppVerifierLoaded() {
return GetModuleHandleA(kApplicationVerifierDllName);
}
std::optional<std::wstring> ExpandEnvironmentVariables(wcstring_view str) {
std::wstring path_expanded;
DWORD path_len = MAX_PATH;
for (int iterations = 0; iterations < 5; iterations++) {
DWORD result = ::ExpandEnvironmentStringsW(
str.c_str(), base::WriteInto(&path_expanded, path_len), path_len);
if (!result) {
// Failed to expand variables.
break;
}
if (result <= path_len) {
return path_expanded.substr(0, result - 1);
}
path_len = result;
}
return std::nullopt;
}
expected<std::wstring, NTSTATUS> GetObjectTypeName(HANDLE handle) {
if (!HandleTraits::IsHandleValid(handle)) {
return unexpected(STATUS_INVALID_HANDLE);
}
// The buffer must be large enough to hold the type info struct plus the type
// string and its terminator. Allocate a buffer large enough to hold a type
// name of 31 characters. This is far larger than the 13 chars needed for
// "WindowStation".
static constexpr size_t kMaxTypeNameLength = 31;
static constexpr size_t kBufferSize =
sizeof(PUBLIC_OBJECT_TYPE_INFORMATION) +
(kMaxTypeNameLength + 1) * sizeof(wchar_t);
auto buffer = HeapArray<uint8_t>::Uninit(kBufferSize);
auto* type_info =
reinterpret_cast<PUBLIC_OBJECT_TYPE_INFORMATION*>(buffer.data());
ULONG type_info_length = 0;
if (auto status =
::NtQueryObject(handle, ObjectTypeInformation, type_info,
static_cast<ULONG>(buffer.size()), &type_info_length);
status != STATUS_SUCCESS) {
if (status == STATUS_INFO_LENGTH_MISMATCH) {
// The call should never fail due to lack of space in the buffer as per
// calculations above. Report the required size in this case so that the
// calculations can be revised.
SCOPED_CRASH_KEY_NUMBER("NtQueryObject", "type_info_length",
type_info_length);
debug::DumpWithoutCrashing(); // https://crbug.com/40071993.
}
return unexpected(status);
}
return std::wstring(type_info->TypeName.Buffer,
type_info->TypeName.Length / sizeof(wchar_t));
}
ProcessPowerState GetProcessEcoQoSState(HANDLE process) {
return GetProcessPowerThrottlingState(
process, PROCESS_POWER_THROTTLING_EXECUTION_SPEED);
}
ProcessPowerState GetProcessTimerThrottleState(HANDLE process) {
return GetProcessPowerThrottlingState(
process, PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION);
}
bool SetProcessEcoQoSState(HANDLE process, ProcessPowerState state) {
return SetProcessPowerThrottlingState(
process, PROCESS_POWER_THROTTLING_EXECUTION_SPEED, state);
}
bool SetProcessTimerThrottleState(HANDLE process, ProcessPowerState state) {
return SetProcessPowerThrottlingState(
process, PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION, state);
}
std::optional<std::wstring> GetSerialNumber() {
AssertComInitialized();
Microsoft::WRL::ComPtr<ABI::Windows::System::Profile::SystemManufacturers::
ISmbiosInformationStatics>
symbios_information_statics;
HRESULT hr = ::RoGetActivationFactory(
base::win::HStringReference(
RuntimeClass_Windows_System_Profile_SystemManufacturers_SmbiosInformation)
.Get(),
IID_PPV_ARGS(&symbios_information_statics));
if (SUCCEEDED(hr)) {
HSTRING serial_number;
hr = symbios_information_statics->get_SerialNumber(&serial_number);
if (SUCCEEDED(hr)) {
base::win::ScopedHString scoped_serial_number(serial_number);
return std::wstring(scoped_serial_number.Get());
}
}
return std::nullopt;
}
ScopedDomainStateForTesting::ScopedDomainStateForTesting(bool state)
: initial_state_(IsEnrolledToDomain()) {
*GetDomainEnrollmentStateStorage() = state;
}
ScopedDomainStateForTesting::~ScopedDomainStateForTesting() {
*GetDomainEnrollmentStateStorage() = initial_state_;
}
ScopedDeviceRegisteredWithManagementForTesting::
ScopedDeviceRegisteredWithManagementForTesting(bool state)
: initial_state_(IsDeviceRegisteredWithManagement()) {
*GetRegisteredWithManagementStateStorage() = state;
}
ScopedDeviceRegisteredWithManagementForTesting::
~ScopedDeviceRegisteredWithManagementForTesting() {
*GetRegisteredWithManagementStateStorage() = initial_state_;
}
ScopedAzureADJoinStateForTesting::ScopedAzureADJoinStateForTesting(bool state)
: initial_state_(std::exchange(*GetAzureADJoinStateStorage(), state)) {}
ScopedAzureADJoinStateForTesting::~ScopedAzureADJoinStateForTesting() {
*GetAzureADJoinStateStorage() = initial_state_;
}
ScopedDeviceConvertibilityStateForTesting::
ScopedDeviceConvertibilityStateForTesting(
bool form_convertible,
bool chassis_convertible,
QueryKeyFunction csm_changed,
std::optional<bool> convertible_chassis_key,
std::optional<bool> convertibility_enabled)
: initial_form_convertible_(&IsDeviceFormConvertible(), form_convertible),
initial_chassis_convertible_(&IsChassisConvertible(),
chassis_convertible),
initial_csm_changed_(&HasCSMStateChanged(), csm_changed),
initial_convertible_chassis_key_(&GetConvertibleChassisKeyValue(),
convertible_chassis_key),
initial_convertibility_enabled_(&GetConvertibilityEnabledOverride(),
convertibility_enabled) {}
ScopedDeviceConvertibilityStateForTesting::
~ScopedDeviceConvertibilityStateForTesting() = default;
} // namespace win
} // namespace base
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