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sys_info.hpp
/*
SPDX-License-Identifier: MIT
Copyright © 2023 Amebis
*/
#pragma once
#include "compat.hpp"
#include "system.hpp"
#ifdef _WIN32
#include "windows.h"
#include <stdlib.h>
#include <tchar.h>
#else
#include <sys/utsname.h>
#endif
#include <memory>
namespace stdex
{
#ifdef _WIN32
typedef uint16_t platform_id;
#else
typedef const char* platform_id;
#endif
}
#ifndef _WIN32
constexpr stdex::platform_id IMAGE_FILE_MACHINE_UNKNOWN = nullptr;
constexpr stdex::platform_id IMAGE_FILE_MACHINE_I386 = "i386";
constexpr stdex::platform_id IMAGE_FILE_MACHINE_AMD64 = "x86_64";
constexpr stdex::platform_id IMAGE_FILE_MACHINE_ARMNT = "arm";
constexpr stdex::platform_id IMAGE_FILE_MACHINE_ARM64 = "aarch64";
inline bool operator ==(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return a == b; }
inline bool operator !=(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return a != b; }
inline bool operator <(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return a == IMAGE_FILE_MACHINE_UNKNOWN && b != IMAGE_FILE_MACHINE_UNKNOWN || a != IMAGE_FILE_MACHINE_UNKNOWN && b != IMAGE_FILE_MACHINE_UNKNOWN && strcmp(a, b) < 0; }
inline bool operator <=(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return a == IMAGE_FILE_MACHINE_UNKNOWN || a != IMAGE_FILE_MACHINE_UNKNOWN && b != IMAGE_FILE_MACHINE_UNKNOWN && strcmp(a, b) <= 0; }
inline bool operator >(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return a != IMAGE_FILE_MACHINE_UNKNOWN && b == IMAGE_FILE_MACHINE_UNKNOWN || a != IMAGE_FILE_MACHINE_UNKNOWN && b != IMAGE_FILE_MACHINE_UNKNOWN && strcmp(a, b) > 0; }
inline bool operator >=(_In_ const stdex::platform_id a, _In_ const stdex::platform_id b) { return b == IMAGE_FILE_MACHINE_UNKNOWN || a != IMAGE_FILE_MACHINE_UNKNOWN && b != IMAGE_FILE_MACHINE_UNKNOWN && strcmp(a, b) >= 0; }
#endif
namespace stdex
{
inline const struct sys_info_t
{
#if _M_IX86
static constexpr platform_id process_platform = IMAGE_FILE_MACHINE_I386;
#elif _M_X64 // _M_ARM64EC is introducing as x64
static constexpr platform_id process_platform = IMAGE_FILE_MACHINE_AMD64;
#elif _M_ARM
static constexpr platform_id process_platform = IMAGE_FILE_MACHINE_ARMNT;
#elif _M_ARM64
static constexpr platform_id process_platform = IMAGE_FILE_MACHINE_ARM64;
#elif __i386__
static constexpr platform_id process_platform = "i386";
#elif __x86_64__
static constexpr platform_id process_platform = "x86_64";
#elif __aarch64__
static constexpr platform_id process_platform = "aarch64";
#else
#error Unknown platform
#endif
platform_id os_platform;
#ifdef _WIN32
bool wow64;
#endif
bool interactive_process;
bool admin;
bool elevated;
sys_info_t() :
os_platform(IMAGE_FILE_MACHINE_UNKNOWN),
#ifdef _WIN32
wow64(false),
#endif
interactive_process(true),
admin(false),
elevated(false)
{
#ifdef _WIN32
HMODULE kernel32_handle;
kernel32_handle = LoadLibrary(_T("kernel32.dll"));
_Assume_(kernel32_handle);
BOOL(WINAPI * IsWow64Process2)(HANDLE hProcess, USHORT * pProcessMachine, USHORT * pNativeMachine);
*reinterpret_cast<FARPROC*>(&IsWow64Process2) = GetProcAddress(kernel32_handle, "IsWow64Process2");
HANDLE process = GetCurrentProcess();
USHORT process_machine;
#ifndef _WIN64
BOOL Wow64Process;
#endif
if (IsWow64Process2 && IsWow64Process2(process, &process_machine, &os_platform)) {
wow64 = process_machine != IMAGE_FILE_MACHINE_UNKNOWN;
}
#ifdef _WIN64
else {
os_platform = process_platform;
wow64 = false;
}
#else
else if (IsWow64Process(process, &Wow64Process)) {
if (Wow64Process) {
os_platform = IMAGE_FILE_MACHINE_AMD64;
wow64 = true;
}
else {
os_platform = process_platform;
wow64 = false;
}
}
#endif
FreeLibrary(kernel32_handle);
#else
memset(&m_utsn, 0, sizeof(m_utsn));
if (uname(&m_utsn) != -1)
os_platform = reinterpret_cast<platform_id>(m_utsn.machine);
#endif
#ifdef _WIN32
HWINSTA hWinSta = GetProcessWindowStation();
if (hWinSta) {
TCHAR sName[MAX_PATH];
if (GetUserObjectInformation(hWinSta, UOI_NAME, sName, sizeof(sName), NULL)) {
sName[_countof(sName) - 1] = 0;
// Only "WinSta0" is interactive (Source: KB171890)
interactive_process = _tcsicmp(sName, _T("WinSta0")) == 0;
}
}
#else
// TODO: Research interactive process vs service/agent/daemon on this platform.
#endif
#if defined(_WIN32)
{
HANDLE token_h;
if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token_h)) {
sys_object token(token_h);
TOKEN_ELEVATION elevation;
DWORD size = sizeof(TOKEN_ELEVATION);
if (GetTokenInformation(token_h, TokenElevation, &elevation, sizeof(elevation), &size))
elevated = elevation.TokenIsElevated;
GetTokenInformation(token.get(), TokenGroups, NULL, 0, &size);
std::unique_ptr<TOKEN_GROUPS> groups((TOKEN_GROUPS*)new uint8_t[size]);
if (GetTokenInformation(token.get(), TokenGroups, (LPVOID)groups.get(), size, &size)) {
SID_IDENTIFIER_AUTHORITY authority = SECURITY_NT_AUTHORITY;
PSID sid_admins_h = NULL;
if (AllocateAndInitializeSid(&authority, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &sid_admins_h)) {
struct SID_delete { void operator()(_In_ PSID p) const { FreeSid(p); } };
std::unique_ptr<void, SID_delete> sid_admins(sid_admins_h);
for (DWORD i = 0; i < groups->GroupCount; ++i)
if (EqualSid(sid_admins.get(), groups->Groups[i].Sid)) {
admin = true;
break;
}
}
}
}
}
#elif defined(__APPLE__)
{
gid_t gids[NGROUPS + 1]; // A user cannot be member in more than NGROUPS groups, not counting the default group (hence the + 1)
for (int i = 0, n = getgroups(_countof(gids), gids); i < n; ++i) {
struct group* group = getgrgid(gids[i]);
if (!group) continue;
if (strcmp(group->gr_name, "admin") == 0) {
admin = true;
break;
}
}
}
elevated = geteuid() == 0;
#else
// TODO: Set admin.
elevated = geteuid() == 0;
#endif
}
protected:
#ifndef _WIN32
struct utsname m_utsn;
#endif
} sys_info;
}
stdex::sys_object
Operating system object (file, pipe, anything with an OS handle etc.)
Definition system.hpp:93
stdex::sys_object::get
sys_handle get() const noexcept
Returns object handle.
Definition system.hpp:150
stdex::sys_info_t
System information.
Definition sys_info.hpp:52
stdex::sys_info_t::admin
bool admin
Is member of local group Administrators (Windows) or member of group wheel/sudoers (others)?
Definition sys_info.hpp:94
stdex::sys_info_t::elevated
bool elevated
Is elevated process (Windows) or running as root (others)?
Definition sys_info.hpp:99
stdex::sys_info_t::os_platform
platform_id os_platform
The platform this process was compiled for.
Definition sys_info.hpp:77
stdex::sys_info_t::interactive_process
bool interactive_process
Is interactive process?
Definition sys_info.hpp:89