Same here. I would like to generate an in-memory, temporary certificate, e.g.

// @flow

import {
  promisify
} from 'util';
import pem from 'pem';
import type {
  SslCertificateType
} from '../types';

const createCertificate = promisify(pem.createCertificate);

const createSslCertificate = async (): Promise<SslCertificateType> => {
  const {
    certificate,
    csr,
    serviceKey
  } = await createCertificate({
    days: 365,
    selfSigned: true
  });

  return {
    certificate,
    csr,
    serviceKey
  };
};

There is currently no way to feed this to AnyProxy.

I also have this need and ask for help.