var Decrypter = require('aes-decrypter').Decrypter;
var fs = require('fs');
var keyContent = fs.readFileSync('something.key');
var encryptedBytes = fs.readFileSync('somithing.txt');

// keyContent is a string of the aes-keys content
var keyContent = fs.readFileSync(keyFile);

var view = new DataView(keyContent.buffer);
var key.bytes = new Uint32Array([
	view.getUint32(0),
	view.getUint32(4),
	view.getUint32(8),
	view.getUint32(12)
]);

key.iv = new Uint32Array([
	0, 0, 0, 0
]);

var d = new Decrypter(
	encryptedBytes,
	key.bytes,
	key.iv,
	function(err, decryptedBytes) {
		// err always null
});