Checking clients certificate in Meteor

Question

Is there a way in Meteor to check a clients certificate, so that only a client who owns a specific certificate can connect to the server?
Basically I want a SSL connection, but with bidirectional authentification, so the client also has to proof his identity, not just the server.
The certificates can be self-signed, so not certificate authority is needed.

To make my question clearer: How can I access the clients certificate, when a connection is established?