Bug 271623

Summary:	isConditionalMediationAvailable and isUserVerifyingPlatformAuthenticatorAvailable incorrectly returns false on Safari on macOS
Product:	WebKit	Reporter:	James Manger <james>
Component:	New Bugs	Assignee:	pascoe <pascoe>
Status:	NEW ---
Severity:	Normal	CC:	bfulgham, pascoe, webkit-bug-importer, wilander
Priority:	P2	Keywords:	InRadar
Version:	Safari 17
Hardware:	Mac (Apple Silicon)
OS:	macOS 14

Description James Manger 2024-03-24 21:30:24 PDT

PublicKeyCredential.isConditionalMediationAvailable() returns false (after the promise resolves) on Safari 17.4 on macOS 14.4 when it should return true.

PublicKeyCredential.getClientCapabilities() returns conditionalMediation: true. So passkey (aka WebAuthn) conditional mediation is supported, but the two ways to report that are inconsistent.

var icma = await window.PublicKeyCredential.isConditionalMediationAvailable();
console.log(icma);

PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable() also returns false incorrectly.
PublicKeyCredential.getClientCapabilities() correctly returns userVerifyingPlatformAuthenticator: true.

Comment 1 James Manger 2024-03-25 08:34:53 PDT

"iCloud > Passwords & Keychain" is off (by corporate policy).

It's good to know that the problem may be limited to people with less common settings. But it is still a bug.

Comment 2 Radar WebKit Bug Importer 2024-03-25 09:24:54 PDT

<rdar://problem/125357876>

Comment 3 pascoe@apple.com 2024-03-25 09:43:34 PDT

I'm unable to reproduce this on my machine running 14.4 and Safari 17.4. 

Is Keychain enabled in your iCloud settings?

Comment 4 James Manger 2024-03-26 16:25:55 PDT

"iCloud > Passwords & Keychain" is off (by corporate policy).

It's good to know that the problem may be limited to people with less common settings. But it is still a bug.