[webrtc-pc] Certificate API: Do we need certificate introspection?

alvestrand has just created a new issue for 
https://github.com/w3c/webrtc-pc:

== Certificate API: Do we need certificate introspection? ==
At the moment, the certificate API we provide is this:

interface RTCCertificate {
    readonly        attribute DOMTimeStamp expires;
};

A question was raised on whether we could tell if a given cert was RSA
 or ECDSA - there doesn't seem to be one.

Would it be reasonable to require an introspection API that is able to
 tell something about it (possibly a subset of its keygen parameters)?

Please view or discuss this issue at 
https://github.com/w3c/webrtc-pc/issues/496 using your GitHub account