where does return value of PublicKeyCredential.getClientExtensionResults() come from?

[equalsJeffH]

PublicKeyCredential Interface used to look like this:

[SecureContext]
interface PublicKeyCredential : Credential {
  [SameObject] readonly attribute ArrayBuffer              rawId;
  [SameObject] readonly attribute AuthenticatorResponse    response;
  [SameObject] readonly attribute AuthenticationExtensions clientExtensionResults;
};

..and contained the clientExtensionResults. but we can't do that due to webidl reasons, so we have changed it to be (via PR #633)..

[SecureContext, Exposed=Window]
interface PublicKeyCredential : Credential {
    [SameObject] readonly attribute ArrayBuffer              rawId;
    [SameObject] readonly attribute AuthenticatorResponse    response;
    AuthenticationExtensions getClientExtensionResults();
};

However, in trying to re-craft the generation of a PublicKeyCredential object in the context of PR #498, we cannot invoke getClientExtensionResults() to get the client extension results because we're building the PublicKeyCredential object and getClientExtensionResults() is part of said object.

I presume we need to obtain the the client extension output value and stash it somewhere such that it can be returned to RP script when said RP script invokes getClientExtensionResults() ?

To do that, would we need to define an internal slot in PublicKeyCredential which contains ref to an arraybuffer associated with the |global| which contains the bytes of the result of invoking any requested client extensions, and then invocation of getClientExtensionResults() returns (a reference to?) the arraybuffer?

[nadalin]

@equalsJeffH Where do we stand with this ?

[jcjones]

This is one of those situations where work is needed for spec-completeness, but this is straightforward for implementation as-is, and isn't ambiguous in terms of interop. I think this could be punted to CR if it needed to be.

[equalsJeffH]

see PR #662