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[runner] Change way of dropping privileges to start PT Run

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This commit is contained in:
Enrico Giordani
2020-05-29 19:02:37 +02:00
committed by Enrico Giordani
parent e96c82b171
commit e6408a0c37
5 changed files with 72 additions and 59 deletions
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11
src/action_runner/action_runner.cpp
View File

@@ -186,20 +186,16 @@ int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
}
std::wstring_view action{ args[1] };
if (action == L"-start_PowerLauncher")
{
if (is_process_elevated(false) == true)
{
drop_elevated_privileges();
}
HANDLE hMapFile = OpenFileMappingW(FILE_MAP_WRITE, FALSE, POWER_LAUNCHER_PID_SHARED_FILE);
if (hMapFile)
{
PDWORD pidBuffer = reinterpret_cast<PDWORD>(MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(DWORD)));
if (pidBuffer)
{
*pidBuffer = 0;
run_non_elevated(L"modules\\launcher\\PowerLauncher.exe", L"", pidBuffer);
run_same_elevation(L"modules\\launcher\\PowerLauncher.exe", L"", pidBuffer);
FlushViewOfFile(pidBuffer, sizeof(DWORD));
UnmapViewOfFile(pidBuffer);
}
@@ -207,6 +203,7 @@ int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
FlushFileBuffers(hMapFile);
CloseHandle(hMapFile);
}
}
else if (action == L"-install_dotnet")
{
if (dotnet_is_installed())

32
src/common/common.cpp
View File

@@ -510,7 +510,7 @@ bool run_non_elevated(const std::wstring& file, const std::wstring& params, DWOR
siex.lpAttributeList = pptal;
siex.StartupInfo.cb = sizeof(siex);
PROCESS_INFORMATION process_info = { 0 };
PROCESS_INFORMATION pi = { 0 };
auto succeeded = CreateProcessW(file.c_str(),
const_cast<LPWSTR>(executable_args.c_str()),
nullptr,
@@ -520,31 +520,35 @@ bool run_non_elevated(const std::wstring& file, const std::wstring& params, DWOR
nullptr,
nullptr,
&siex.StartupInfo,
&process_info);
if (process_info.hProcess)
&pi);
if (succeeded)
{
if (pi.hProcess)
{
if (returnPid)
{
*returnPid = GetProcessId(process_info.hProcess);
*returnPid = GetProcessId(pi.hProcess);
}
CloseHandle(process_info.hProcess);
CloseHandle(pi.hProcess);
}
if (process_info.hThread)
if (pi.hThread)
{
CloseHandle(process_info.hThread);
CloseHandle(pi.hThread);
}
}
return succeeded;
}
bool run_same_elevation(const std::wstring& file, const std::wstring& params)
bool run_same_elevation(const std::wstring& file, const std::wstring& params, DWORD* returnPid)
{
auto executable_args = L"\"" + file + L"\"";
if (!params.empty())
{
executable_args += L" " + params;
}
STARTUPINFO si = { 0 };
PROCESS_INFORMATION pi = { 0 };
auto succeeded = CreateProcessW(file.c_str(),
@@ -557,14 +561,24 @@ bool run_same_elevation(const std::wstring& file, const std::wstring& params)
nullptr,
&si,
&pi);
if (succeeded)
{
if (pi.hProcess)
{
if (returnPid)
{
*returnPid = GetProcessId(pi.hProcess);
}
CloseHandle(pi.hProcess);
}
if (pi.hThread)
{
CloseHandle(pi.hThread);
}
}
return succeeded;
}

4
src/common/common.h
View File

@@ -73,7 +73,7 @@ bool run_elevated(const std::wstring& file, const std::wstring& params);
bool run_non_elevated(const std::wstring& file, const std::wstring& params, DWORD* returnPid);
// Run command with the same elevation, returns true if succeeded
bool run_same_elevation(const std::wstring& file, const std::wstring& params);
bool run_same_elevation(const std::wstring& file, const std::wstring& params, DWORD* returnPid);
// Returns true if the current process is running from administrator account
bool check_user_is_admin();
@@ -137,4 +137,4 @@ struct overloaded : Ts...
template<class... Ts>
overloaded(Ts...)->overloaded<Ts...>;
#define POWER_LAUNCHER_PID_SHARED_FILE L"Global\\3cbfbad4-199b-4e2c-9825-942d5d3d3c74"
#define POWER_LAUNCHER_PID_SHARED_FILE L"Local\\3cbfbad4-199b-4e2c-9825-942d5d3d3c74"

18
src/modules/launcher/Microsoft.Launcher/dllmain.cpp
View File

@@ -132,7 +132,7 @@ public:
// Enable the powertoy
virtual void enable()
{
if (is_process_elevated(false) == false)
if (!is_process_elevated(false))
{
SHELLEXECUTEINFOW sei{ sizeof(sei) };
sei.fMask = { SEE_MASK_NOCLOSEPROCESS | SEE_MASK_FLAG_NO_UI };
@@ -146,19 +146,19 @@ public:
{
std::wstring action_runner_path = get_module_folderpath();
action_runner_path += L"\\action_runner.exe";
SHELLEXECUTEINFOW sei{ sizeof(sei) };
sei.fMask = { SEE_MASK_NOCLOSEPROCESS | SEE_MASK_FLAG_NO_UI | SEE_MASK_NOASYNC };
sei.lpFile = action_runner_path.c_str();
sei.nShow = SW_SHOWNORMAL;
sei.lpParameters = L"-start_PowerLauncher";
// Set up the shared file from which to retrieve the PID of PowerLauncher
HANDLE hMapFile = CreateFileMappingW(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, sizeof(DWORD), POWER_LAUNCHER_PID_SHARED_FILE);
if (hMapFile)
{
PDWORD pidBuffer = reinterpret_cast<PDWORD>(MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(DWORD)));
if (pidBuffer)
{
*pidBuffer = 0;
m_hProcess = NULL;
ShellExecuteExW(&sei);
if (run_non_elevated(action_runner_path, L"-start_PowerLauncher", nullptr))
{
const int maxRetries = 20;
for (int retry = 0; retry < maxRetries; ++retry)
{
@@ -170,9 +170,11 @@ public:
break;
}
}
}
}
CloseHandle(hMapFile);
}
}
m_enabled = true;
}

2
src/runner/restart_elevated.cpp
View File

@@ -47,5 +47,5 @@ bool restart_same_elevation()
constexpr DWORD exe_path_size = 0xFFFF;
auto exe_path = std::make_unique<wchar_t[]>(exe_path_size);
GetModuleFileNameW(nullptr, exe_path.get(), exe_path_size);
return run_same_elevation(exe_path.get(), L"--dont-elevate");
return run_same_elevation(exe_path.get(), L"--dont-elevate", nullptr);
}