utransformers

uTransformers

uTransformers is a transport-layer obfuscation library for uProxy.

This library currently builds two uTransformers modules:

• uTransformers.rabbit: based on http://en.wikipedia.org/wiki/Rabbit_(cipher)
• uTransformers.fte: based on https://github.com/uproxy/libfte

See "Example Usage" below for more details.

Installation

npm install uTransformers

Example Usage

FTE

var fte = require('uTransformers/src/transformers/uTransformers.fte.js');
var regex2dfa = require('regex2dfa/regex2dfa.js');

var transformer = new fte.Transformer();

var key = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF";
var ab_key = str2ab(key);
transformer.setKey(ab_key);

var json_obj = {
  'plaintext_dfa': regex2dfa.regex2dfa("^.+$"),
  'plaintext_max_len': 128,
  'ciphertext_dfa': regex2dfa.regex2dfa("^.+$"),,
  'ciphertext_max_len': 128
        
var json_str = JSON.stringify(json_obj);
transformer.configure(json_str);

var ab_plaintext = str2ab(input_plaintext);
var ciphertext = transformer.transform(ab_plaintext);
var ab_output_plaintext = transformer.restore(ciphertext);
var output_plaintext = ab2str(ab_output_plaintext);

Rabbit

var rabbit = require('uTransformers/src/transformers/uTransformers.rabbit.js');
var transformer = new rabbit.Transformer();

var key = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF";
var ab_key = str2ab(key);
transformer.setKey(ab_key);

var ab_plaintext = str2ab(input_plaintext);
var ciphertext = transformer.transform(ab_plaintext);
var ab_output_plaintext = transformer.restore(ciphertext);
var output_plaintext = ab2str(ab_output_plaintext);

Building

There are two stages to the build process:

• The first stage is the process of building uTransformers.fte.js and uTransformers.rabbit.js using emscripten. This is done in a vagrant virutal machine. See vagrant/README.md for details. To ease the build process, these artifacts are checked into git when the their cc files change.
• The second step of the build process runs jasmine tests with grunt. This produces artifacts in build/.