NodeJS - URSA : Asymmetric Cryptology

nodeJs.ursa.asymmetricCriptography.js

// How to encrypt/decrypt with ursa module (asymmetric cryptology)
var ursa     = require('ursa')
  , message  = 'Hello world!'
  , encoding = 'base64'

// Creating a pair of keys (a private key contains both keys...)
console.log('Generating Keys Pair...')
var keys = ursa.generatePrivateKey()

// Making a private key
var privPem = keys.toPrivatePem(encoding)
  , priv = ursa.createPrivateKey(privPem, '', encoding)
console.log('Private Key:', privPem)

// Making a public key
var pubPem = keys.toPublicPem(encoding)
  , pub = ursa.createPublicKey(pubPem, encoding)
console.log('\nPublic Key:', pubPem)

var data = new Buffer(message, 'ascii')
console.log('\n\nMessage:', message)
console.log('Data:', data)

// Encrypting (with the public key)
var encrypted = pub.encrypt(data, encoding)
console.log('Encrypted Data: ', encrypted)
console.log('Encrypted Message: ', encrypted.toString('ascii'))

// Decrypting (with the private key)
var decrypted = priv.decrypt(encrypted, encoding)
console.log('Decrypted Data: ', decrypted)
console.log('Decrypted Message: ', decrypted.toString('ascii'))