Readme.md

Object encryptor decryptor using aes192. It converts any object to a base64 encrypted string, and the oposite from an encrypted base64 string to an object. Note that objects are first converted to JSON, don't expect functions to be converted.

Example:

c=require('object_cryptor');
c1=c(''abcdefghijklmnopqrstuvxyz');
var obj = {
  a: 'a',
  'one': 1,
  'sub': {
    'two': 2,
    'three': 'three'
  }
}
c1.encrypt(obj);
// 'VZE/AoEbgIzaOAKeBTp5523SfXKEGchfw1dLHTzs2dJRz9u4DxfICGfpxqaRwgc/WsBZj4igPHdxF1BTlsS+Vg=='

c1.decrypt('VZE/AoEbgIzaOAKeBTp5523SfXKEGchfw1dLHTzs2dJRz9u4DxfICGfpxqaRwgc/WsBZj4igPHdxF1BTlsS+Vg==')
// { a: 'a', one: 1, sub: { two: 2, three: 'three' } }

index.js

var crypto = require('crypto');
module.exports = function (secret) {
  secret = secret || crypto.pseudoRandomBytes(128).toString('hex');
  return {
    encrypt: function(obj) {
      var str = JSON.stringify(obj) || '';
      var buf = Buffer(str, 'utf8');
      var c = crypto.createCipher('aes192', secret);
      var b1 = c.update(buf);
      var b2 = c.final();
      return Buffer.concat([ b1, b2 ]).toString('base64');
    },
    decrypt: function(encoded_str) {
      var buf = Buffer(encoded_str, 'base64');
      var c = crypto.createDecipher('aes192', secret);
      var b1 = c.update(buf);
      var b2 = c.final();
      var str = Buffer.concat([ b1, b2 ]).toString('utf8');
      try {
	return JSON.parse(str);
      }
      catch(e) {
	return str;
      }
    }
  };
};

package.json

{
  "name": "object_cryptor",
  "version": "0.0.2",
  "description": "Object encryptor decryptor using aes192. It converts any object to a base64 encrypted string, and the oposite. Objects are first converted to JSON, don't expect functions to be converted.",
  "main": "index.js",
  "scripts": {
    "test": "node test.js"
  },
  "repository": {
    "type": "git",
    "url": "git+https://gist.github.com/0158808b0c3711b0bdd80193e95d0a44.git"
  },
  "author": "",
  "license": "ISC",
  "bugs": {
    "url": "https://gist.github.com/0158808b0c3711b0bdd80193e95d0a44"
  },
  "homepage": "https://gist.github.com/0158808b0c3711b0bdd80193e95d0a44"
}

test.js

var assert = require('assert');
var c=require('./index');
var c1, c2;
c1=c();

// Supports i18n
var str='Amb accents: á, é , í';
assert(str === c1.decrypt(c1.encrypt(str)));

// works with long strings (longer than aes block)
str='hola, com va totes les coses que passen per on estem la majoria de vegades  ?, això no hi ha manera de que creixi, sempre té la mateixa longitud, carai ja no sé que més ficar per a que el xifrat es fagi molt més llarg del que ha sigut fins ara. Em tornaré voig.';
assert(str === c1.decrypt(c1.encrypt(str)));

// two crypts using same password give same results
c1 = c('abcdefghijklmnopqrstuvxyz');
c2 = c('abcdefghijklmnopqrstuvxyz');
assert(c1 !== c2);
assert(str === c1.decrypt(c2.encrypt(str)));
assert(str === c2.decrypt(c1.encrypt(str)));

// objects
var obj = {
  a: 'a',
  'one': 1,
  'sub': {
    'two': 2,
    'three': 'three'
  }
}
var decoded_obj = c1.decrypt(c1.encrypt(obj));
assert(obj !== decoded_obj);
assert(obj.a === decoded_obj.a);
assert(obj.one === decoded_obj.one);
assert(obj.sub.two === decoded_obj.sub.two);
assert(obj.sub.three === decoded_obj.sub.three);

// arrays
obj = ['a', 'b'];
decoded_obj = c1.decrypt(c1.encrypt(obj));
assert(obj !== decoded_obj);
assert(obj[0] === decoded_obj[0]);