About

Library emulating Enigma machine encryption/decryption in Javascript.

It is used for encrypting and decrypting messages.

Configuration:
- rotors: I, II, III, IV, V
- reflectors: B, C
- plugboard: up to 13 pairs of letters
- rotor offsets
- rotor ring settings

More about Enigma

Install

npm install @janbican/enigma

Usage

Default Enigma (rotors: I, II, III, reflector: B, offsets: 'AAA', ringSetings: 'AAA', pairs: [])

``javascript
const { Enigma, rotors, reflectors } = require('@janbican/enigma')

const enigma = new Enigma()

const cipher = enigma.convertText('HELLOWORLD')
console.log(cipher)
// ILBDAAMTAZ

`

Enigma with custome settings

`javascript
const { Enigma, rotors, reflectors } = require('@janbican/enigma')

const enigma = new Enigma({
left: rotors.IV, middle: rotors.V, right: rotors.I,
reflector: reflectors.C,
offsets: 'ZTF', ringSettings: 'FDC',
pairs: ['TF', 'GJ', 'AP', 'MC']
})

const cipher = enigma.convertText('HELLOWORLD')
console.log(cipher)
// CXCIIRIOGA

``

API specification in lib/enigma.js

Notes

- valid alphabet: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
- convertText(text) normalizes text (deletes spaces, interpunction, diacritics)