Steam API Check Bypass

Bypasses Steam API dll integrity/size check by hooking CreateFile API.

Build

• Build with Visual Studio 2022.

Usage

• If you are using x32 version please use _x32 version dll.

Method 1

• Use CFF Explorer and add any dll import to game main exe, then put the SteamAPICheckBypass(_x32).dll dll beside game exe.

Method 2 (VersionShim) (x64 for pre-built version.dll)

• Rename SteamAPICheckBypass(_x32).dll to version.dll/winmm.dll/winhttp.dll and put it beside game exe.

Configuration (Optional)

• Create SteamAPICheckBypass.json and write file names you want to replace. Example:

{
    "steam_api64.dll":
    {
      "mode": "file_redirect",
      "to": "steam_api64.dll.bak",
      "hook_times_mode": "nth_time_only",
      "hook_time_n": [1,2,3],
      "bypass_loadlibrary": true
    },
    "game.exe":
    {
        "mode": "file_redirect",
        "to": "game.exe.bak",
        "hook_times_mode": "nth_time_only",
        "hook_time_n": [1,2,3]
    }
}

• mode: file_redirect or file_hide.
• to : The target file relative path.
• hook_times_mode: all, nth_time_only or not_nth_time_only.
• hook_time_n: The list of nth time to hook / not hook. (Start from 1, LoadLibrary triggered hook is not counted)
• bypass_loadlibrary: Bypass loadlibrary caused file read request.
• The hook time option is useful for custom requirements.

Internal Process

• Please refer to nt_file_dupe Readme for more information.

Dependencies

• https://github.com/otavepto/nt-fs-dupe

Bugs

If You Have Any Bugs, Please Submit a Issue On Github.
cs.rin.ru thread: https://cs.rin.ru/forum/viewtopic.php?f=10&t=136448

Donate

Bitcoin: bc1qk39k55wxwx8yj4w35qu4vh3x4nhn90kq2mempn
Bitcoin Cash: qzlc8qv59y5lssm9rct2rq5puznqpv9s4qhvhw3k7j
Ethereum: 0xCBEF4582Fd0d049F3eBB7552027848f54C99cb38
Stellar: GCMQOHLH6I6QZKCFXWS6VKTDHABFK5KA3CQIZW5JL6GBQYSDCFF5VL2E