javascript-obfuscator

JavaScript obfuscator for Node.js

JavaScript obfuscator for Node.js is a free alternative of js-obfuscator (which uses javascriptobfuscator.com) without any limits and sending data to a server. Compatible with ES6. Tested on Angular2 bundle. https://gist.github.com/sanex3339/ffc2876123b52e6d11ce45369fd53acf

Installation

Install the package with NPM and add it to your devDependencies:

npm install --save-dev javascript-obfuscator

Usage

var JavaScriptObfuscator = require('javascript-obfuscator');

var obfuscatedCode = JavaScriptObfuscator.obfuscate(
    `
    (function(){
        var variable = 'abc';
        console.log(variable);
    })();
    `,
    {
        rotateUnicodeArray: false
    }
);

console.log(obfuscatedCode);
/*
var _0xabf1 = [
    '\x61\x62\x63', 
    '\x6c\x6f\x67'
];
(function() {
    var _0xe6fab6 = _0xabf1[0x0];
    console[_0xabf1[0x1]](_0xe6fab6);
}());
*/

obfuscate(sourceCode, options)

sourceCode

Type: string Default: null

Any valid SourceCode.

options

Type: Object Default: null

Options for JavaScript obfuscator:

{
    rotateUnicodeArray: true
    // ...
}

Available options

compact

Type: boolean Default: true

Compact code output into one line.

debugProtection

Type: boolean Default: false

:warning: This option can cause browser freeze while Developer Tools is enabled! Use at own risk.

Force enable debug mode in some browsers (mainly based on WebKit) on page load if Developer Tools panel is enabled. With this options using of Debug panel is impossible.

WebKit-based browsers: blocks the site window, but you still can navigate through Developer Tools panel. Firefox: does not block the site window, but you still can't use Debug panel.

debugProtectionInterval

Type: boolean Default: false

:warning: This option can cause browser freeze even while Developer Tools is disabled! Use at own risk.

Works if debugProtection is enabled.

Force enable debug mode in some browsers (mainly based on WebKit) when Developer Tools panel was enabled, even after page was loaded.

disableConsoleOutput

Type: boolean Default: true

Disable console.log, console.info, console.error and console.warn messages output into browser console.

encodeUnicodeLiterals

Type: boolean Default: false

:warning: unicodeArray option must be enabled

This option can slightly slowdown your code speed.

All literals in unicode array becomes encoded in Base64. To decode strings, special function will be inserted on page under unicodeArray node.

reservedNames

Type: string[] Default: []

Disable obfuscation of variable names, function names and names of function parameters that match with given RegExp pattern.

Example:

	{
		reservedNames: [
			'^someVariable',
			'functionParameter_\d'
		]
	}

rotateUnicodeArray

Type: boolean Default: true

:warning: unicodeArray option must be enabled

This option will rotate all values inside unicodeArray on a random value during obfuscation of code, and insert inside source code helper function which will rotate array values back to their original indexes.

Keep in mind that this option affects only how the code is visually organised, since the original arrays can be easily accessed during the debug process.

It is also not recommended to enable rotateUnicodeArray for small source code, because a helper function might attract attention.

selfDefending

Type: boolean Default: true

:warning: this option forces set the compact value to true

Enables self-defending for obfuscated code. If obfuscated compact code will be formatted, this code will not work.

unicodeArray

Type: boolean Default: true

Put all literal strings into array and replace every literal string by array call.

unicodeArrayThreshold

Type: number Default: 0.8 Min: 0 Max: 1

:warning: unicodeArray option must be enabled

Probability that the literal string will inserted into unicodeArray. Use this option for huge source code size, because many calls to unicodeArray will slowdown code performance.

Value 0 is equals unicodeArray: false.

wrapUnicodeArrayCalls

Type: boolean Default: true

:warning: unicodeArray option must be enabled

Instead using direct calls to unicodeArray items var t = _0x43a123[0x0], when index 0x0 can be easily reverted to 0 with few js beautifiers, this option will wrap all calls to special function instead.

var t = _0x12a634('0x0')

License

Copyright (C) 2016 Timofey Kachalov.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.