crypto.js

const forge = require('node-forge');
const rsa = forge.pki.rsa;

const crypto = {
  forge,
  generateKeys: () => {
    return new Promise((resolve, reject) => {
      // generate an RSA key pair asynchronously (uses web workers if available)
      // use workers: -1 to run a fast core estimator to optimize # of workers
      rsa.generateKeyPair({bits: 1024, workers: 2}, (err, keypair) => {
        if (err) {
          return reject(err);
        }

        let newKeys = {
          publicKey: forge.pki.publicKeyToPem(keypair.publicKey),
          privateKey: forge.pki.privateKeyToPem(keypair.privateKey)
        };

        resolve(newKeys);
      });
    });
  },
  encrypt: (msg, pubKey) => {
    return rsa.encrypt(msg, forge.pki.publicKeyFromPem(pubKey), true);
  },
  decrypt: (msg, priKey) => {
    return rsa.decrypt(msg, forge.pki.privateKeyFromPem(priKey), false, false);
  }
}

module.exports = crypto;