1810851 - `authenticatorAttachment` field in WebAuthn `PublicKeyCredential` return values

Status: RESOLVED FIXED

(Core :: DOM: Web Authentication, enhancement, P3)

Description

[Lucas Garron]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Steps to reproduce:

1. Go to https://github.github.com/webauthn-json/demo/
2. Register a security key.

Actual results:

The response (visible in the main <textarea>) does not include the authenticatorAttachment field.

Expected results:

The response (visible in the main <textarea>) includes the authenticatorAttachment field: https://w3c.github.io/webauthn/#dom-publickeycredential-authenticatorattachment
If this is not possible, an option might be to return null instead:

Relying Parties SHOULD treat unknown values as if the value were null.

I've had a bug report for a library I maintain, and I need to figure out the best way to reconcile Firefox's (lack of) support with the types specified in the spec: https://github.com/github/webauthn-json/issues/73#issuecomment-1385957680

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::DOM: Web Authentication' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[John Schanck [:jschanck]]

Attachment: Bug 1810851 - add the authenticator attachment field to PublicKeyCredential. r=keeler

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/8121384d13ff
add the authenticator attachment field to PublicKeyCredential. r=keeler,webidl,smaug

Comment 4

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/8121384d13ff

Comment 5

[Hamish Willee]

FF120 MDN docs work for this can be tracked in https://github.com/mdn/content/issues/29782. The docs were already done for the method so this was just release note and browser compatibility data.