Custom Locks

JS-Confuser

Customize the lock algorithm to your own implementation.

Option name: "lock.customLocks"

Option values: true/false/0-1

Input / Output

This example showcases how Custom Locks transforms the code. Try it out by changing the input code and see changes apply in real-time.

Input.js

Output.js

function v7lox1q() {
  return navigator.userAgent.includes("Chrome");
}
if (!v7lox1q()) {
  uQV5ebl();
}
var n4RuiI = !1;
function uQV5ebl() {
  if (n4RuiI) return;
  n4RuiI = !0;
  Xlc0Kk();
}
function Xlc0Kk() {
  function n4RuiI() {
    return navigator.userAgent.includes("Chrome");
  }
  if (!n4RuiI()) {
    uQV5ebl();
  }
  throw new Error("Invalid browser!");
}
console.log("This only runs in Chrome!");

Custom Locks API

Custom Locks allow you to define your own lock algorithm. These locks will be randomly sprinkled throughout the code.

The properties of the type Custom Lock are:

Property	Type	Description
code	string	Template lock code that must contain '{countermeasures}'.
percentagePerBlock	number	The percentage of blocks that will contain the lock.
maxCount	number	The maximum number of times the lock can be used. (Default = 25)
minCount	number	The minimum number of times the lock can be used. (Default = 1)

Usage Example

The provided code example will obfuscate the file input.js and write the output to a file named output.js.

Usage Example

import JSConfuser from "js-confuser";
import {readFileSync, writeFileSync} from "fs";
// Read input code
const sourceCode = readFileSync("input.js", "utf8");
const options = {
  target: 'browser',
  lock: {
    countermeasures: 'countermeasures',
    customLocks: [
      {
        code: `
              function checkChrome(){
                return navigator.userAgent.includes("Chrome")
              }
              if(!checkChrome()){
                {countermeasures}
              }
              `,
        percentagePerBlock: 0.5,
        maxCount: 25,
        minCount: 1,
      },
    ],
  },
};
JSConfuser.obfuscate(sourceCode, options).then((result)=>{
  // Write output code
  writeFileSync("output.js", result.code);
}).catch(err=>{
  // Error occurred
  console.error(err);  
});

Custom Locks

Input / Output

Custom Locks API

Usage Example

Enabled In

See Also