How to consume npm modules from Frida agent scripts

_FridaCommonJSIntegration.md

Install Node.js 5.x, then:

npm install frida co uuid

and run:

node app.js

agent.js

'use strict';

const uuid = require('uuid');

rpc.exports = {
  init() {
    Interceptor.attach(Module.findExportByName('libsystem_kernel.dylib', 'open'), {
      onEnter(args) {
        send(['open', Memory.readUtf8String(args[0])]);
      }
    });

    return uuid.v4();
  }
};

app.js

'use strict';

const co = require('co');
const frida = require('frida');

let session, script;
co(function *() {
  const source = yield frida.load(require.resolve('./agent.js'));
  const device = yield frida.getUsbDevice();
  const pid = yield device.spawn(['com.atebits.Tweetie2']);
  session = yield device.attach(pid);
  script = yield session.createScript(source);
  script.events.listen('message', onMessage);
  yield script.load();
  const api = yield script.getExports();
  const id = yield api.init();
  console.log('Got ID:', id);
  yield device.resume(pid);
})
.catch(onError);

function onError(error) {
  console.error(error.stack);
}

function onMessage(message, data) {
  if (message.type === 'send') {
    console.log(message.payload);
  } else if (message.type === 'error') {
    console.error(message.stack);
  } else {
    console.log(message);
  }
}