Generate TOTP

Time-based One-Time Password: Time-based One-time Password is a computer algorithm that generates a one-time password which uses the current time as a source of uniqueness. An extension of the HMAC-based One-time Password algorithm, it has been adopted as Internet Engineering Task Force standard RFC 6238. Wikipedia

1. Installation

   npm i gen-totp
   // or
   yarn add gen-totp

2. Usage

  const genTOTP = require('gen-totp');
  
  const otp = genTOTP('test-key');
  // that will return otp with length 6 numbers

  const genTOTP = require('gen-totp');
  
  const otp = genTOTP('test-key', { digits: 4 });
  // that will return otp with length 4 numbers

Options

genTOTP take two parameters

1. key this is a string that contains numbers, characters, _ and -
2. options this an Object
   • digits this is the number of digits will return
   • period this is the time to generate new otp after it (this by seconds)
   • algorithm this is algorithm to pure hash numbers

     the complete Secure Hash Standard (SHA) family (SHA-1, SHA-224/256/384/512, SHA3-224/256/384/512, SHAKE128/256, cSHAKE128/256, and KMAC128/256) with HMAC. jssha

Documentation

Official Documentation