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#include "envwindows.h"
#include "env.h"
#include "envmodule.h"
#include <log.h>
#include <utility.h>
namespace env
{
using namespace MOBase;
WindowsInfo::WindowsInfo()
{
// loading ntdll.dll, the functions will be found with GetProcAddress()
LibraryPtr ntdll(LoadLibraryW(L"ntdll.dll"));
if (!ntdll) {
log::error("failed to load ntdll.dll while getting version");
return;
} else {
m_reported = getReportedVersion(ntdll.get());
m_real = getRealVersion(ntdll.get());
}
m_release = getRelease();
m_elevated = getElevated();
}
bool WindowsInfo::compatibilityMode() const
{
if (m_real == Version()) {
// don't know the real version, can't guess compatibility mode
return false;
}
return (m_real != m_reported);
}
const WindowsInfo::Version& WindowsInfo::reportedVersion() const
{
return m_reported;
}
const WindowsInfo::Version& WindowsInfo::realVersion() const
{
return m_real;
}
const WindowsInfo::Release& WindowsInfo::release() const
{
return m_release;
}
std::optional<bool> WindowsInfo::isElevated() const
{
return m_elevated;
}
QString WindowsInfo::toString() const
{
QStringList sl;
const QString reported = m_reported.toString();
const QString real = m_real.toString();
// version
sl.push_back("version " + reported);
// real version if different
if (compatibilityMode()) {
sl.push_back("real version " + real);
}
// build.UBR, such as 17763.557
if (m_release.UBR != 0) {
DWORD build = 0;
if (compatibilityMode()) {
build = m_real.build;
} else {
build = m_reported.build;
}
sl.push_back(QString("%1.%2").arg(build).arg(m_release.UBR));
}
// release ID
if (!m_release.ID.isEmpty()) {
sl.push_back("release " + m_release.ID);
}
// buildlab string
if (!m_release.buildLab.isEmpty()) {
sl.push_back(m_release.buildLab);
}
// elevated
QString elevated = "?";
if (m_elevated.has_value()) {
elevated = (*m_elevated ? "yes" : "no");
}
sl.push_back("elevated: " + elevated);
return sl.join(", ");
}
WindowsInfo::Version WindowsInfo::getReportedVersion(HINSTANCE ntdll) const
{
// windows has been deprecating pretty much all the functions having to do
// with getting version information because apparently, people keep misusing
// them for feature detection
//
// there's still RtlGetVersion() though
using RtlGetVersionType = NTSTATUS(NTAPI)(PRTL_OSVERSIONINFOW);
auto* RtlGetVersion =
reinterpret_cast<RtlGetVersionType*>(GetProcAddress(ntdll, "RtlGetVersion"));
if (!RtlGetVersion) {
log::error("RtlGetVersion() not found in ntdll.dll");
return {};
}
OSVERSIONINFOEX vi = {};
vi.dwOSVersionInfoSize = sizeof(vi);
// this apparently never fails
RtlGetVersion((RTL_OSVERSIONINFOW*)&vi);
return {vi.dwMajorVersion, vi.dwMinorVersion, vi.dwBuildNumber};
}
WindowsInfo::Version WindowsInfo::getRealVersion(HINSTANCE ntdll) const
{
// getting the actual windows version is more difficult because all the
// functions are lying when running in compatibility mode
//
// RtlGetNtVersionNumbers() is an undocumented function that seems to work
// fine, but it might not in the future
using RtlGetNtVersionNumbersType = void(NTAPI)(DWORD*, DWORD*, DWORD*);
auto* RtlGetNtVersionNumbers = reinterpret_cast<RtlGetNtVersionNumbersType*>(
GetProcAddress(ntdll, "RtlGetNtVersionNumbers"));
if (!RtlGetNtVersionNumbers) {
log::error("RtlGetNtVersionNumbers not found in ntdll.dll");
return {};
}
DWORD major = 0, minor = 0, build = 0;
RtlGetNtVersionNumbers(&major, &minor, &build);
// for whatever reason, the build number has 0xf0000000 set
build = 0x0fffffff & build;
return {major, minor, build};
}
WindowsInfo::Release WindowsInfo::getRelease() const
{
// there are several interesting items in the registry, but most of them
// are undocumented, not always available, and localizable
//
// most of them are used to provide as much information as possible in case
// any of the other versions fail to work
QSettings settings(
R"(HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion)",
QSettings::NativeFormat);
Release r;
// buildlab seems to be an internal name from the build system
r.buildLab = settings.value("BuildLabEx", "").toString();
if (r.buildLab.isEmpty()) {
r.buildLab = settings.value("BuildLab", "").toString();
if (r.buildLab.isEmpty()) {
r.buildLab = settings.value("BuildBranch", "").toString();
}
}
// release ID, such as 1803
r.ID = settings.value("DisplayVersion", "").toString();
if (r.ID.isEmpty()) {
r.ID = settings.value("ReleaseId", "").toString();
}
// some other build number, shown in winver.exe
r.UBR = settings.value("UBR", 0).toUInt();
return r;
}
std::optional<bool> WindowsInfo::getElevated() const
{
HandlePtr token;
{
HANDLE rawToken = 0;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &rawToken)) {
const auto e = GetLastError();
log::error("while trying to check if process is elevated, "
"OpenProcessToken() failed: {}",
formatSystemMessage(e));
return {};
}
token.reset(rawToken);
}
TOKEN_ELEVATION e = {};
DWORD size = sizeof(TOKEN_ELEVATION);
if (!GetTokenInformation(token.get(), TokenElevation, &e, sizeof(e), &size)) {
const auto e = GetLastError();
log::error("while trying to check if process is elevated, "
"GetTokenInformation() failed: {}",
formatSystemMessage(e));
return {};
}
return (e.TokenIsElevated != 0);
}
} // namespace env
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