Explanation

Two implement a two factor authentication you can use several ways. One of them is a one time passoword. One time password based on two types:

• TOTP
• HOTP

This is a react native application which demonstrates similar functionality same as Google Authentiocator

In this application, also you can find a OAuth authentication flow. The idea behind this is that user authenticates by an authentication server and secret key could return in a claim to the application and automatically user redirects to OTP screen. It's under implementation.

Installation

• Run npm i.
• To setup the crypto libraries run this command ./node_modules/.bin/rn-nodeify --hack --install

Run

• android: react-native run-android

Config

you can find all the application configs in src/lib/settings.

options

  options: {
      name: 'whatever you like',
      keySize: 32,	// secret key is 32 characters long
      codeLength: 6, // authentication code is 6 digits long
      epoch: 0,
      timeSlice: 60	// each code is valid for 60 seconds
    }

Screen shots