[WebAuthn] support for Large Blob extension

WebKit PR #9891 added support for the WebAuthn Large Blob extension in the browser. (Hooray!) Does Apple plan to add support for this extension (or similar, such as PRF) in MacOS and iOS platform authenticators? If so, where can we track this?

More context: I've been developing with these extensions using other authenticators. After #9891 I hoped my native platform authenticator on Macbook Pro M1 (with Safari Preview Release 170 on Ventura 13.4) might support largeBlob. But after testing it seems I was mistaken.

Thanks!

This extension is available starting in iOS 17, iPadOS 17, and Safari 17 on macOS. All of the new WebKit features are covered in the WWDC WebKit release notes

Wonderful, thank you!

[WebAuthn] support for Large Blob extension
 
 
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