rc4a

RC4A.js v0.1.2

NodeJS/JavaScript implementation of simple and powerfull string encryption/decryption with the password & UTF-8 support. You can encrypt string in the browser and decrypt it on the PHP-server. Or encrypt on the PHP-server and decrypt in browser.

Go to RC4A for PHP on GitHub

No dependecies! No OpenSSL required. Javascript, NodeJS, PHP compatible.

How to use in project

JavaScript:

<script src="rc4a.min.js" type="text/javascript"></script>

NodeJS:

var rc4a = require("rc4a");

Encryption

var text = "Lorem ipsum 123 ёюйяъэ !№;%:?*()";
var password = "supёrP@$$w0rd";
var secret = rc4a.encrypt(text,password);
console.log(secret); // Will output something like this: ]êòd»÷€[c #hüm€Zº‰í¤˜xì“/S-ˆѲѩҴӷдӂp±⅁ÑD_»¼ú{

Decryption

var decryptedText = rc4a.decrypt(secret,password);
console.log(decryptedText); // Will output: Lorem ipsum 123 ёюйяъэ !№;%:?*()

Encryption with the custom salt

RC4A.js automatically generate random salt via Math.random(). Salt size is dynamic - from 16 up to 128. If you do not trust, you can use your own salt up to 9999-size length. Just specify it:

var customSalt = "397ba6e0085f182db7ee7f6e3515530d";
var secret = rc4a.encrypt(text,password,customSalt);

And that's it. You don't have to pass salt for the decryption.

Error catching

Do not forget about damaged data. Test your code like this:

var text = "Lorem ipsum 123 ёюйяъэ !№;%:?*()";
var password = "supёrP@$$w0rd";
var secret = rc4a.encrypt(text,password).substr(4); // let's damage this encrypted content
try{
  var decryptedText = rc4a.decrypt(secret,password); // here you will get an error
  console.log("Successfully decrypted! Decrypted text:",decryptedText);
}catch(e){
  console.log("Can\'t decrypt your data.");
}

TODO:

• Beatiful Threw Error
• Add streams