A lightweight, open-source tool for Python code obfuscation. CodeEnigma helps protect your logic from reverse engineering and unauthorized access, making it secure to distribute your Python applications.

🔒 Why CodeEnigma?

After searching extensively for a free and open-source Python obfuscation tool, I realized that most available options were either paid, closed-source, or opaque in how they worked. I wasn't comfortable letting a black-box tool encrypt my production code without knowing exactly what it was doing — especially when it had access to sensitive logic.

So I built CodeEnigma — a transparent, self-contained solution that gives you full control over the obfuscation process, with no hidden logic and no external servers involved.

This project is inspired by PyArmor but with a different approach.

High Level Architecture

The working principle of CodeEnigma is simple:

1. The user provides the path to the Python module to obfuscate.
2. CodeEnigma reads the module's source code.
3. An AES-256 key is generated using a secure random number generator and set in private.py
4. Obfuscation runs file by file running the following steps:
   • 4.1. Compile using compile(code, str(file_path), "exec")
   • 4.2. Compress the byte code using zlib.compress(compiled_code)
   • 4.3. Encode the compressed byte code using base64.b64encode(compressed_code)
   • 4.4. Encrypt the encoded byte code using AESGCM(SECRET_KEY).encrypt(NONCE, obfuscated, associated_data=None) refer for more details:
5. CodeEnigma creates a new module with the obfuscated code.
6. A codeenigma_runtime.pyx file is created with the deobfuscation logic to decrypt and execute the obfuscated code.
7. The runtime is compiled to a Python extension module using Cython. Also generates a codeenigma_runtime.whl file for distribution.
8. End of process, the obfuscated module is ready to be distributed as wheel files.

Features

• 🔒 Strong encryption using AES-256
• 🔄 Simple API for obfuscating any python module
• 🔑 Secure and dynamic key generation
• 🛠️ Command-line interface for easy integration into build processes
• 📦 Lightweight and dependency-minimal

Installation

Using Poetry:

poetry add codeenigma

Using pip:

pip install codeenigma

Usage

CodeEnigma comes with a user-friendly command-line interface powered by Typer. The CLI provides helpful prompts and rich output.

Basic Usage

To obfuscate a Python module:

codeenigma obfuscate /path/to/your/module

Command Line Options

• --expiration, -e: Set an expiration date for the obfuscated code (YYYY-MM-DD)
• --output, -o, --dist: Specify output directory (default: 'dist')
• --verbose, -v: Show detailed output

Examples

Obfuscate with an expiration date:

The following example will obfuscate the module and set the expiration date to December 31, 2025, at 23:59:59+0530 (IST).

codeenigma obfuscate /path/to/your/module -e "2025-12-31 23:59:59+0530"

Specify custom output directory:

codeenigma obfuscate /path/to/your/module -o custom_output

Version Information

To check the installed version:

codeenigma version

Contributing

Contributions are welcome! This is a complete free and open-source project. If you have any suggestions or find any bugs, please open an issue.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Built with ❤️ using Python
• Uses cryptography for secure encryption
• Uses Cython for compiling the runtime
• Logo Credits, Claude 🫡