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Source Code Protection

Introduction​

This is a tutorial to guide you how to protect your source code to prevent reverse engineering.

Assumption

This tutorial is assumed that you source code are all in src folder, an you have a index.ts file in the root directory of your project.

If you have a different structure, you can modify the tsconfig.json file to match your project structure.

Obfuscation​

Obfuscation is a technique to make your code unreadable to humans. It is a way to protect your code from reverse engineering. There are many tools available to obfuscate your code.

In this tutorial, we will use the javascript-obfuscator package to obfuscate our code.

Steps​

  1. Install the following packages:
npm install -D typescript @types/node ts-node tsconfig-paths eslint eslint-config-airbnb-base eslint-plugin-import jasmine ncp javascript-obfuscator tsc-alias nyc
  1. Add the following scripts to your package.json file:
{
  "name": "your-module-name",
  "main": "dist/src/index.js",
  "types": "dist/src/index.d.ts",
  "scripts": {
    "obstructor:node": "ncp dist obfuscated && javascript-obfuscator dist --compact true --target node --output obfuscated",
    "obstructor:browser": "ncp dist obfuscated && javascript-obfuscator dist --compact true --target browser --output obfuscated",
  }
}

You can use the obstructor:node script to obfuscate your code for Node.js and the obstructor:browser script to obfuscate your code for the browser.

To compile your code into a node module, follow this tutorial.