Forge X.509

var pki = forge.pki;
var rsa = pki.rsa;

// generate an RSA key pair synchronously 
var keypair = rsa.generateKeyPair(2048);
var publicKey = keypair.publicKey;
var privateKey = keypair.privateKey; 

// convert a Forge public key to PEM-format
var pemPub = pki.publicKeyToPem(publicKey);
var pemPriv = pki.privateKeyToPem(privateKey);