A command-line interface for disassembling and assembling the Hermes Bytecode.
Project description
hbctool
A command-line interface for disassembling and assembling the Hermes Bytecode.
Since React Native team created their own JavaScript engine (named Hermes) for running the React Native application, the JavaScript source code is compiled to the Hermes bytecode. In peneration test project, I found that some React Native applications have already been migrated to Hermes engine. It is really head for me to analyze or patch those applications. Therefore, I created this tool for helping any pentester to test the Hermes bytecode.
Hermes is an open-source JavaScript engine optimized for running React Native apps on Android. For many apps, enabling Hermes will result in improved start-up time, decreased memory usage, and smaller app size. At this time Hermes is an opt-in React Native feature, and this guide explains how to enable it.
Installation
To install hbctool, simply use pip:
pip install hbctool
Usage
Please execute hbctool --help
for showing the usage.
hbctool --help
A command-line interface for disassembling and assembling
the Hermes Bytecode.
Usage:
hbctool disasm <HBC_FILE> <HASM_PATH>
hbctool asm <HASM_PATH> <HBC_FILE>
hbctool --help
hbctool --version
Operation:
disasm Disassemble Hermes Bytecode
asm Assemble Hermes Bytecode
Args:
HBC_FILE Target HBC file
HASM_PATH Target HASM directory path
Options:
--version Show hbctool version
--help Show hbctool help manual
Examples:
hbctool disasm index.android.bundle test_hasm
hbctool asm test_hasm index.android.bundle
For Android, the HBC file normally locates at
assets
directory withindex.android.bundle
filename.
Contribution
Feel free to create an issue or submit the merge request. Anyway you want to contribute this project. I'm very happy about it.
However, please run the unittest before submit the pull request.
python test.py
I use poetry to build this tool, For building tool, simply execute:
poetry install
Project details
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