new stub for old steam lib

2026-02-04 05:21:16 +01:00 · 2025-08-01 18:35:19 +03:00
parent a273f2e0e4
commit 82e7b2c570
7 changed files with 612 additions and 0 deletions
--- a/.github/workflows/emu-build-all-win.yml
+++ b/.github/workflows/emu-build-all-win.yml
@@ -43,6 +43,8 @@ jobs:
            "steamclient_experimental_loader",
            "steamclient_experimental_extra",
            "lib_game_overlay_renderer",
+            # steam old lib
+            "lib_steam_old",
            # tools
            "tool_lobby_connect",
            "tool_generate_interfaces",
--- a/package_win.bat
+++ b/package_win.bat
@@ -56,6 +56,10 @@ if exist "%TARGET_DIR%\experimental\" (
  copy /y "%ROOT%\post_build\README.experimental.md" "%TARGET_DIR%\experimental\"
 )

+if exist "%TARGET_DIR%\steam_old_lib\" (
+  copy /y "%ROOT%\post_build\README.steam_old_lib.md" "%TARGET_DIR%\steam_old_lib\"
+)
+
 if exist "%TARGET_DIR%\steamclient_experimental\" (
  xcopy /y /s /e /r "%ROOT%\post_build\win\ColdClientLoader.EXAMPLE\" "%TARGET_DIR%\steamclient_experimental\dll_injection.EXAMPLE\"
  copy /y "%ROOT%\post_build\README.experimental_steamclient.md" "%TARGET_DIR%\steamclient_experimental\"
--- a/post_build/README.steam_old_lib.md
+++ b/post_build/README.steam_old_lib.md
@@ -0,0 +1,12 @@
+## What is this ?
+This is an old Windows-only library equivalent to `steam_api.dll` that's still used by some old games.  
+
+## How to use ?
+- Copy/Paste it beside the game's `.exe` file
+- Inject it via `ColdClientLoader`, or any other loader you prefer
+
+## Purpose ?
+Bypass initial/basic checks in old games protected with old version of Stub drm.  
+
+## Note
+Note that it doesn't emulate any Steam functionality at the moment.  
--- a/premake5.lua
+++ b/premake5.lua
@@ -1354,6 +1354,45 @@ project "steamclient_experimental_extra"
 -- End steamclient_experimental_extra


+-- Project lib_steam_old
+project "lib_steam_old"
+    -- https://premake.github.io/docs/Configurations-and-Platforms/#per-project-configurations
+    removeplatforms { "x64" }
+
+    kind "SharedLib"
+    location "%{wks.location}/%{prj.name}"
+    targetdir(path.join(build_dir, os_iden, _ACTION, "%{cfg.buildcfg}/steam_old_lib"))
+    targetname "Steam"
+
+
+    -- include dir
+    ---------
+    -- x32 include dir
+    includedirs {
+        x32_deps_include,
+    }
+
+
+    -- common source & header files
+    ---------
+    filter {} -- reset the filter and remove all active keywords
+    files {
+        "steam_old_lib/**",
+        "helpers/common_helpers.cpp", "helpers/common_helpers/**",
+        'libs/utfcpp/**',
+        -- detours
+        detours_files,
+    }
+    removefiles {
+        'libs/detours/uimports.cc',
+    }
+    -- x32 common source files
+    files {
+        "resources/win/client/32/resources.rc"
+    }
+-- End lib_steam_old
+
+
 -- Project steamclient_experimental_loader
 project "steamclient_experimental_loader"
    kind "WindowedApp"
--- a/steam_old_lib/dllmain.cpp
+++ b/steam_old_lib/dllmain.cpp
@@ -0,0 +1,34 @@
+#include "steam_old_lib.hpp"
+
+
+static bool dll_loaded = false;
+
+BOOL APIENTRY DllMain(HMODULE hModule, DWORD  reason, LPVOID lpReserved)
+{
+    switch (reason) {
+    case DLL_PROCESS_ATTACH: {
+        if (!soldlib::patch((void*)hModule)) {
+
+#ifdef SOLD_EXTRA_DEBUG
+            MessageBoxA(nullptr, "Failed to initialize", "Main", MB_OK | MB_ICONERROR);
+#endif
+
+            // https://learn.microsoft.com/en-us/windows/win32/dlls/dllmain
+            // "The system immediately calls your entry-point function with DLL_PROCESS_DETACH and unloads the DLL"
+            return FALSE;
+        }
+
+        dll_loaded = true;
+    }
+    break;
+
+    case DLL_PROCESS_DETACH: {
+        if (dll_loaded) {
+            soldlib::restore();
+        }
+    }
+    break;
+    }
+
+    return TRUE;
+}
--- a/steam_old_lib/steam_old_lib.cpp
+++ b/steam_old_lib/steam_old_lib.cpp
@@ -0,0 +1,399 @@
+#include "steam_old_lib.hpp"
+
+#include "common_helpers/common_helpers.hpp"
+
+#include "detours/detours.h"
+
+#include <string>
+#include <stdexcept>
+#include <string_view>
+#include <cstdint>
+
+#include <Softpub.h> // WinVerifyTrust
+
+
+#define S_API extern "C" __declspec(dllexport)
+#define STEAM_CALL __cdecl
+
+#define STEAM_INVALID_CALL_HANDLE 0
+
+
+static HMODULE my_hModule = nullptr;
+HMODULE wintrust_dll = nullptr;
+std::wstring wintrust_lib_path = L"";
+
+static bool WinVerifyTrust_hooked = false;
+static bool LoadLibraryA_hooked = false;
+static bool LoadLibraryExA_hooked = false;
+static bool LoadLibraryW_hooked = false;
+static bool LoadLibraryExW_hooked = false;
+
+static decltype(WinVerifyTrust) *actual_WinVerifyTrust = nullptr;
+__declspec(noinline)
+static LONG WINAPI WinVerifyTrust_hook(HWND hwnd, GUID *pgActionID, LPVOID pWVTData) {
+    if (WinVerifyTrust_hooked) {
+        SetLastError(ERROR_SUCCESS);
+        return 0; // success
+    }
+
+    if (actual_WinVerifyTrust) {
+        return actual_WinVerifyTrust(hwnd, pgActionID, pWVTData);
+    }
+    
+    SetLastError(ERROR_SUCCESS);
+    return 0; // success
+}
+
+static decltype(LoadLibraryA) *actual_LoadLibraryA = LoadLibraryA;
+__declspec(noinline)
+static HMODULE WINAPI LoadLibraryA_hook(LPCSTR lpLibFileName)
+{
+    if (LoadLibraryA_hooked &&
+        lpLibFileName && lpLibFileName[0] &&
+        common_helpers::ends_with_i(lpLibFileName, "Steam.dll")) {
+        return my_hModule;
+    }
+
+    return actual_LoadLibraryA(lpLibFileName);
+}
+
+static decltype(LoadLibraryExA) *actual_LoadLibraryExA = LoadLibraryExA;
+__declspec(noinline)
+static HMODULE WINAPI LoadLibraryExA_hook(LPCSTR lpLibFileName, HANDLE hFile, DWORD dwFlags)
+{
+    if (LoadLibraryExA_hooked &&
+        lpLibFileName && lpLibFileName[0] &&
+        common_helpers::ends_with_i(lpLibFileName, "Steam.dll")) {
+        return my_hModule;
+    }
+
+    return actual_LoadLibraryExA(lpLibFileName, hFile, dwFlags);
+}
+
+static decltype(LoadLibraryW) *actual_LoadLibraryW = LoadLibraryW;
+__declspec(noinline)
+static HMODULE WINAPI LoadLibraryW_hook(LPCWSTR lpLibFileName)
+{
+    if (LoadLibraryW_hooked &&
+        lpLibFileName && lpLibFileName[0] &&
+        common_helpers::ends_with_i(lpLibFileName, L"Steam.dll")) {
+        return my_hModule;
+    }
+
+    return actual_LoadLibraryW(lpLibFileName);
+}
+
+static decltype(LoadLibraryExW) *actual_LoadLibraryExW = LoadLibraryExW;
+__declspec(noinline)
+static HMODULE WINAPI LoadLibraryExW_hook(LPCWSTR lpLibFileName, HANDLE hFile, DWORD dwFlags)
+{
+    if (LoadLibraryExW_hooked &&
+        lpLibFileName && lpLibFileName[0] &&
+        common_helpers::ends_with_i(lpLibFileName, L"Steam.dll")) {
+        return my_hModule;
+    }
+
+    return actual_LoadLibraryExW(lpLibFileName, hFile, dwFlags);
+}
+
+
+static bool redirect_win32_apis()
+{
+    try {
+        wintrust_dll = LoadLibraryExW(wintrust_lib_path.c_str(), NULL, 0);
+        if (!wintrust_dll) throw std::runtime_error("");
+
+        actual_WinVerifyTrust = (decltype(actual_WinVerifyTrust))GetProcAddress(wintrust_dll, "WinVerifyTrust");
+        if (!actual_WinVerifyTrust) throw std::runtime_error("");
+
+        if (DetourTransactionBegin() != NO_ERROR) throw std::runtime_error("");
+        if (DetourUpdateThread(GetCurrentThread()) != NO_ERROR) throw std::runtime_error("");
+
+        if (DetourAttach((PVOID *)&actual_WinVerifyTrust, (PVOID)WinVerifyTrust_hook) != NO_ERROR) throw std::runtime_error("");
+        if (DetourAttach((PVOID *)&actual_LoadLibraryA, (PVOID)LoadLibraryA_hook) != NO_ERROR) throw std::runtime_error("");
+        if (DetourAttach((PVOID *)&actual_LoadLibraryExA, (PVOID)LoadLibraryExA_hook) != NO_ERROR) throw std::runtime_error("");
+        if (DetourAttach((PVOID *)&actual_LoadLibraryW, (PVOID)LoadLibraryW_hook) != NO_ERROR) throw std::runtime_error("");
+        if (DetourAttach((PVOID *)&actual_LoadLibraryExW, (PVOID)LoadLibraryExW_hook) != NO_ERROR) throw std::runtime_error("");
+        if (DetourTransactionCommit() != NO_ERROR) throw std::runtime_error("");
+
+        WinVerifyTrust_hooked = true;
+        LoadLibraryA_hooked = true;
+        LoadLibraryExA_hooked = true;
+        LoadLibraryW_hooked = true;
+        LoadLibraryExW_hooked = true;
+
+        return true;
+    } catch (...) {
+
+    }
+
+    if (wintrust_dll) {
+        FreeLibrary(wintrust_dll);
+        wintrust_dll = nullptr;
+    }
+
+    return false;
+}
+
+static bool restore_win32_apis()
+{
+    WinVerifyTrust_hooked = false;
+    LoadLibraryA_hooked = false;
+    LoadLibraryExA_hooked = false;
+    LoadLibraryW_hooked = false;
+    LoadLibraryExW_hooked = false;
+
+    bool ret = false;
+
+    try {
+        if (DetourTransactionBegin() != NO_ERROR) throw std::runtime_error("");
+        if (DetourUpdateThread(GetCurrentThread()) != NO_ERROR) throw std::runtime_error("");
+
+        if (actual_WinVerifyTrust) {
+            DetourDetach((PVOID *)&actual_WinVerifyTrust, (PVOID)WinVerifyTrust_hook);
+        }
+
+        DetourDetach((PVOID *)&actual_LoadLibraryA, (PVOID)LoadLibraryA_hook);
+        DetourDetach((PVOID *)&actual_LoadLibraryExA, (PVOID)LoadLibraryExA_hook);
+        DetourDetach((PVOID *)&actual_LoadLibraryW, (PVOID)LoadLibraryW_hook);
+        DetourDetach((PVOID *)&actual_LoadLibraryExW, (PVOID)LoadLibraryExW_hook);
+        if (DetourTransactionCommit() != NO_ERROR) throw std::runtime_error("");
+
+        ret = true;
+    } catch (...) {
+
+    }
+
+    if (wintrust_dll) {
+        FreeLibrary(wintrust_dll);
+        wintrust_dll = nullptr;
+    }
+
+    return ret;
+}
+
+#ifdef SOLD_EXTRA_DEBUG
+extern "C" __declspec(dllexport)
+#endif
+void __cdecl notify_patch_done()
+{
+#ifdef SOLD_EXTRA_DEBUG
+    MessageBoxA(nullptr, "Cleanup/Uninstall was called, hook a debugger here!", "Cleanup called", MB_OK | MB_ICONASTERISK);
+#endif
+}
+
+static void set_ok_err(soldlib::TSteamError *pError) {
+    if (pError) {
+        pError->eSteamError = soldlib::ESteamError::eSteamErrorNone;
+        pError->eDetailedErrorType = soldlib::EDetailedPlatformErrorType::eNoDetailedErrorAvailable;
+        pError->nDetailedErrorCode = 0;
+        pError->szDesc[0] = 0;
+    }
+}
+
+static void set_bad_err(soldlib::TSteamError *pError) {
+    if (pError) {
+        pError->eSteamError = soldlib::ESteamError::eSteamErrorBadArg;
+        pError->eDetailedErrorType = soldlib::EDetailedPlatformErrorType::eNoDetailedErrorAvailable;
+        pError->nDetailedErrorCode = soldlib::ESteamError::eSteamErrorBadArg;
+        pError->szDesc[0] = 0;
+    }
+}
+
+bool soldlib::patch(void *lib_hModule)
+{
+    my_hModule = (HMODULE)lib_hModule;
+
+    if (wintrust_lib_path.empty()) {
+        auto size = GetSystemDirectoryW(&wintrust_lib_path[0], 0);
+        if (size <= 0) return false;
+
+        wintrust_lib_path.resize(size);
+        size = GetSystemDirectoryW(&wintrust_lib_path[0], (unsigned)wintrust_lib_path.size());
+        if (size >= (unsigned)wintrust_lib_path.size()) {
+            wintrust_lib_path.clear();
+            return false;
+        }
+
+        wintrust_lib_path.pop_back(); // remove null
+        wintrust_lib_path += L"\\Wintrust.dll";
+    }
+
+    return redirect_win32_apis();
+}
+
+bool soldlib::restore()
+{
+    return restore_win32_apis();
+}
+
+
+
+S_API int STEAM_CALL SteamStartup( unsigned int uUsingMask, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamCleanup( soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    // restore_win32_apis(); // appid 7450 loads the dll again at runtime, we can't unload here
+    notify_patch_done();
+    return 1;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamUninstall( soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    // restore_win32_apis(); // appid 7450 loads the dll again at runtime, we can't unload here
+    notify_patch_done();
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API int STEAM_CALL SteamGetAccountStatus( unsigned int* puAccountStatusFlags, soldlib::TSteamError *pError )
+{
+    if (puAccountStatusFlags) {
+        *puAccountStatusFlags =
+            soldlib::ESteamAccountStatusBitFields::eSteamAccountStatusDefault
+            | soldlib::ESteamAccountStatusBitFields::eSteamAccountStatusEmailVerified;
+    }
+
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamGetCurrentEmailAddress( char *szEmailaddress, unsigned int uBufSize, unsigned int *puEmailaddressChars, soldlib::TSteamError *pError )
+{
+    constexpr const static std::string_view EMAIL = "orca@gbe.com";
+
+    unsigned copied = 0;
+    if (szEmailaddress && uBufSize > 0) {
+        copied = (unsigned)EMAIL.copy(szEmailaddress, uBufSize);
+        szEmailaddress[copied] = 0;
+    }
+    if (puEmailaddressChars) *puEmailaddressChars = copied;
+    set_ok_err(pError);
+    return 1;
+}
+
+// https://gitlab.com/KittenPopo/csgo-2018-source/-/blob/main/common/Steam.h
+// https://github.com/SteamRE/open-steamworks/blob/master/Open%20Steamworks/Steam.h
+S_API int STEAM_CALL SteamIsAppSubscribed( unsigned int uAppId, int *pbIsAppSubscribed, int *pbIsSubscriptionPending, soldlib::TSteamError *pError ) {
+    if (pbIsAppSubscribed) *pbIsAppSubscribed = 1;
+    if (pbIsSubscriptionPending) *pbIsSubscriptionPending = 0;
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamIsSubscribed( unsigned int uSubscriptionId, int *pbIsSubscribed, int *pbIsSubscriptionPending, soldlib::TSteamError *pError )
+{
+    if (pbIsSubscribed) *pbIsSubscribed = 1;
+    if (pbIsSubscriptionPending) *pbIsSubscriptionPending = 0;
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamIsLoggedIn( int *pbIsLoggedIn, soldlib::TSteamError *pError )
+{
+    if (pbIsLoggedIn) *pbIsLoggedIn = 1;
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamIsSecureComputer( int *pbIsSecureComputer, soldlib::TSteamError *pError )
+{
+    if (pbIsSecureComputer) *pbIsSecureComputer = 1;
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamLaunchApp( unsigned int uAppId, unsigned int uLaunchOption, const char *cszArgs, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamLogin( const char *cszUser, const char *cszPassphrase, int bIsSecureComputer, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamRefreshAccountInfo( soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamRefreshAccountInfoEx( int bContentDescriptionOnly, soldlib::TSteamError* pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamRefreshAccountInfo2( int bRefreshAccount, int bRefreshCDDB, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamRefreshLogin( const char *cszPassphrase, int bIsSecureComputer, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamSubscribe( unsigned int uSubscriptionId, const void /*TSteamSubscriptionBillingInfo*/ *pSubscriptionBillingInfo, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamUnsubscribe( unsigned int uSubscriptionId, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamUpdateAccountBillingInfo( const void /*TSteamPaymentCardInfo*/ *pPaymentCardInfo, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned /*SteamCallHandle_t*/ STEAM_CALL SteamUpdateSubscriptionBillingInfo( unsigned int uSubscriptionId, const void /*TSteamSubscriptionBillingInfo*/ *pSubscriptionBillingInfo, soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return STEAM_INVALID_CALL_HANDLE;
+}
+
+S_API unsigned int STEAM_CALL SteamNumAppsRunning( soldlib::TSteamError *pError )
+{
+    set_ok_err(pError);
+    return 1;
+}
+
+S_API int STEAM_CALL SteamCheckAppOwnership( unsigned int uAppId, int* pbOwned, void /*TSteamGlobalUserID*/ *pSteamID, soldlib::TSteamError* pError )
+{
+    if (pbOwned) *pbOwned = 1;
+    set_ok_err(pError);
+    return 1;
+}
+
+
+S_API int STEAM_CALL SteamGetAppDLCStatus( unsigned int uAppId, unsigned int uDLCCacheId, int *pbDownloaded, soldlib::TSteamError *pError )
+{
+    if (pbDownloaded) *pbDownloaded = 0;
+
+    if (0 == uAppId || UINT32_MAX == uAppId) {
+        set_bad_err(pError);
+        return 0;
+    }
+
+    if (pbDownloaded) *pbDownloaded = 1;
+    set_ok_err(pError);
+    return 1;
+}
--- a/steam_old_lib/steam_old_lib.hpp
+++ b/steam_old_lib/steam_old_lib.hpp
@@ -0,0 +1,122 @@
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+
+#if !defined(SOLD_EXTRA_DEBUG)
+    #if defined(DEBUG) || defined(_DEBUG)
+        #define SOLD_EXTRA_DEBUG
+    #endif
+#endif
+
+
+namespace soldlib {
+
+    // https://github.com/SteamRE/open-steamworks/blob/master/Open%20Steamworks/SteamTypes.h
+#define STEAM_MAX_PATH 255
+
+// https://github.com/SteamRE/open-steamworks/blob/master/Open%20Steamworks/ESteamError.h
+typedef enum ESteamError
+{
+    eSteamErrorNone = 0,
+    eSteamErrorUnknown = 1,
+    eSteamErrorLibraryNotInitialized = 2,
+    eSteamErrorLibraryAlreadyInitialized = 3,
+    eSteamErrorConfig = 4,
+    eSteamErrorContentServerConnect = 5,
+    eSteamErrorBadHandle = 6,
+    eSteamErrorHandlesExhausted = 7,
+    eSteamErrorBadArg = 8,
+    eSteamErrorNotFound = 9,
+    eSteamErrorRead = 10,
+    eSteamErrorEOF = 11,
+    eSteamErrorSeek = 12,
+    eSteamErrorCannotWriteNonUserConfigFile = 13,
+    eSteamErrorCacheOpen = 14,
+    eSteamErrorCacheRead = 15,
+    eSteamErrorCacheCorrupted = 16,
+    eSteamErrorCacheWrite = 17,
+    eSteamErrorCacheSession = 18,
+    eSteamErrorCacheInternal = 19,
+    eSteamErrorCacheBadApp = 20,
+    eSteamErrorCacheVersion = 21,
+    eSteamErrorCacheBadFingerPrint = 22,
+
+    eSteamErrorNotFinishedProcessing = 23,
+    eSteamErrorNothingToDo = 24,
+    eSteamErrorCorruptEncryptedUserIDTicket = 25,
+    eSteamErrorSocketLibraryNotInitialized = 26,
+    eSteamErrorFailedToConnectToUserIDTicketValidationServer = 27,
+    eSteamErrorBadProtocolVersion = 28,
+    eSteamErrorReplayedUserIDTicketFromClient = 29,
+    eSteamErrorReceiveResultBufferTooSmall = 30,
+    eSteamErrorSendFailed = 31,
+    eSteamErrorReceiveFailed = 32,
+    eSteamErrorReplayedReplyFromUserIDTicketValidationServer = 33,
+    eSteamErrorBadSignatureFromUserIDTicketValidationServer = 34,
+    eSteamErrorValidationStalledSoAborted = 35,
+    eSteamErrorInvalidUserIDTicket = 36,
+    eSteamErrorClientLoginRateTooHigh = 37,
+    eSteamErrorClientWasNeverValidated = 38,
+    eSteamErrorInternalSendBufferTooSmall = 39,
+    eSteamErrorInternalReceiveBufferTooSmall = 40,
+    eSteamErrorUserTicketExpired = 41,
+    eSteamErrorCDKeyAlreadyInUseOnAnotherClient = 42,
+
+    eSteamErrorNotLoggedIn = 101,
+    eSteamErrorAlreadyExists = 102,
+    eSteamErrorAlreadySubscribed = 103,
+    eSteamErrorNotSubscribed = 104,
+    eSteamErrorAccessDenied = 105,
+    eSteamErrorFailedToCreateCacheFile = 106,
+    eSteamErrorCallStalledSoAborted = 107,
+    eSteamErrorEngineNotRunning = 108,
+    eSteamErrorEngineConnectionLost = 109,
+    eSteamErrorLoginFailed = 110,
+    eSteamErrorAccountPending = 111,
+    eSteamErrorCacheWasMissingRetry = 112,
+    eSteamErrorLocalTimeIncorrect = 113,
+    eSteamErrorCacheNeedsDecryption = 114,
+    eSteamErrorAccountDisabled = 115,
+    eSteamErrorCacheNeedsRepair = 116,
+    eSteamErrorRebootRequired = 117,
+
+    eSteamErrorNetwork = 200,
+
+    eSteamErrorOffline = 201,
+} ESteamError;
+
+// https://github.com/SteamRE/open-steamworks/blob/master/Open%20Steamworks/TSteamError.h
+typedef enum EDetailedPlatformErrorType
+{
+	eNoDetailedErrorAvailable,
+	eStandardCerrno,
+	eWin32LastError,
+	eWinSockLastError,
+	eDetailedPlatformErrorCount
+} EDetailedPlatformErrorType;
+
+typedef struct TSteamError
+{
+	ESteamError eSteamError;
+	EDetailedPlatformErrorType eDetailedErrorType;
+	int nDetailedErrorCode;
+	char szDesc[STEAM_MAX_PATH];
+} TSteamError;
+
+// https://gitlab.com/KittenPopo/csgo-2018-source/-/blob/main/common/SteamCommon.h
+// https://github.com/ValveSoftware/source-sdk-2013/blob/master/src/common/steamcommon.h
+typedef enum 
+{
+	eSteamAccountStatusDefault			=	0x00000000,
+	eSteamAccountStatusEmailVerified	=	0x00000001,
+	/* Note: Mask value 0x2 is reserved for future use. (Some, but not all, public accounts already have this set.) */
+	eSteamAccountDisabled				=	0x00000004
+} ESteamAccountStatusBitFields;
+
+
+bool patch(void *lib_hModule);
+bool restore();
+
+}