Generate key as tedit extension.

generate-key.js

"use strict";

var rsa = window.forge.rsa;
var pki = window.forge.pki;
var fs = require('data/fs.js');
var reloadTree = require('ui/tree.js').reload;
var notify = require('ui/notify.js');
var modes = require('js-git/lib/modes.js');
var bodec = require('bodec.js');

var privateKey, publicKey;

fs.readBlob("private-key.pem", onRead);

function onRead(err, entry) {
  if (!entry || !entry.blob) {
    notify("Generating RSA key pair..");
    return rsa.generateKeyPair({bits: 2048, workers: 2}, onPair);
  }
  var pem = bodec.toUnicode(entry.blob);
  privateKey = pki.privateKeyFromPem(pem);
  publicKey = pki.setRsaPublicKey(privateKey.n, privateKey.e);
  onKeys();
}

function onPair(err, pair) {
  if (err) throw err;
  notify("Generatied RSA key pair");
  privateKey = pair.privateKey;
  publicKey = pair.publicKey;
  fs.saveAs("", "blob", pki.privateKeyToPem(pair.privateKey), onHash);
}

function onHash(err, hash) {
  if (err) throw err;
  fs.writeEntry("private-key.pem", {
    mode: modes.blob,
    hash: hash
  }, onSaved);
}

function onSaved(err) {
  if (err) throw err;
  console.log("Private Key saved to VFS");
  reloadTree();
  onKeys();
}

function onKeys() {
  console.log({
    privateKey: privateKey,
    publicKey: publicKey
  });
}