nodejs3des/index.js

3DES encryption for FT APIs

/**
 * @author 4y0 / https://github.com/4y0
 */

var CryptoJS = require('crypto-js');
var forge    = require('node-forge');
var utf8     = require('utf8');


/*||==================================||*/
function hTS(hex_String) {

	var hex = hex_String.toString();
	var str = '';

	for (var n = 0; n < hex.length; n += 2) 
	{
		str += String.fromCharCode(parseInt(hex.substr(n, 2), 16)); 
	}
	return str;

}
/*||==================================||*/

var _3DES = {};

/**
* TripleDES encryption
*
* @method encrypt
* @param {String} key
* @param {String} text
*/ 
_3DES.encrypt = function (key, text){

	key          = CryptoJS.MD5(utf8.encode(key)).toString(CryptoJS.enc.Latin1);
	key          = key + key.substring(0, 8); 
	var cipher   = forge.cipher.createCipher('3DES-ECB', forge.util.createBuffer(key));
	cipher.start({iv:''});
	cipher.update(forge.util.createBuffer(text, 'utf-8'));
	cipher.finish();
	var encrypted = cipher.output; 
	return ( forge.util.encode64(encrypted.getBytes()) );

}


/**
* TripleDES decryption
*
* @method decrypt
* @param {String} key
* @param {String} encrypted_text (should be a base64 encoded string)
*/ 
_3DES.decrypt = function (key, encrypted_text){

	key            = CryptoJS.MD5(utf8.encode(key)).toString(CryptoJS.enc.Latin1);
	key            = key + key.substring(0, 8); 
	var decipher   = forge.cipher.createDecipher('3DES-ECB', forge.util.createBuffer(key));
	encrypted_text = forge.util.decode64(encrypted_text);
	decipher.start({iv:''});
	decipher.update(forge.util.createBuffer(encrypted_text, 'utf-8'));
	decipher.finish();
	var decrypted = decipher.output; 
	return hTS( decrypted.toHex() ); 

}

module.exports = _3DES;