node crypto public/private keys

crypto-example.js

var keys = {}
crypto.generateKeyPair('rsa', {
  modulusLength: 4096,
  publicKeyEncoding: {
    type: 'spki',
    format: 'pem'
  },
  privateKeyEncoding: {
    type: 'pkcs8',
    format: 'pem',
  }
}, (err, publicKey, privateKey) => {
  if (err) return console.error('err', err.stack)
  keys = {publicKey, privateKey}

  var cipherText = crypto.publicEncrypt(keys.publicKey, Buffer.from('abc')).toString('hex')
  console.log('cipherText=' + cipherText)

  var plainText = crypto.privateDecrypt(keys.privateKey, Buffer.from(cipherText, 'hex')).toString()
  console.log('plainText=' + plainText)
});