This code suggests not. https://github.com/flatiron/union/blob/6ece680c3c4e2480b74250701b54da6bb61b44d2/lib/core.js#L72..L75 Reference: - https://nodejs.org/api/https.html - https://nodejs.org/api/tls.html#tls_tls_createsecurecontext_options
