Could you clarify which milestones you're requesting? Is it 130 to 140?
If so, can you explain why you think 11 milestones are required for this
experiment (vs 6, which is the default allowed)?
thx
On 8/28/24 5:14 PM, Adam Langley wrote:
Contact emails
a...@chromium.org
Specification
https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats
Summary
Support the attestationFormats field from WebAuthn L3. WebAuthn L3
supports a site expressing an ordered preference for credential
attestation formats in the new attestationFormats field[1]. We plan on
running an origin trial for this new field to allow some interested
sites to experiment with this field on the one OS that currently
supports it (Android). At the end, we'll gauge whether it has
sufficient utility to support on an ongoing basis.
Blink component
Blink>WebAuthentication
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWebAuthentication>
TAG review
None — this one extra field is one of many passed in WebAuthn from a
browser to passkey providers and doesn't represent any meaningful
change in design.
Risks
Interoperability and Compatibility
No risks in general. Users of this field trial will have to keep in
mind that it'll expire, but this is true of all trials.
/Gecko/: No signal
/WebKit/: No signal
/Web developers/: No signals
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
No
Goals for experimentation
To let a handful of interested sites experiment with this
functionality without having to support it ~forever in the broad Web
Platform. At the end of the trial we'll consider whether full support
is warranted.
Ongoing technical constraints
None
Debuggability
The usual tricks for inspecting WebAuthn requests still work, but much
of the logic is implemented by the user's chosen passkey provider.
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
No, because it can only be supported in cases where the underlying
passkey provider infrastructure supports this field, which is
currently only true on Android.
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
No. If we decide in the future to ship this feature fully we'll add
WebDriver support and flesh out the testing. But the need for
integration into a virtual authenticator for testing makes this a
non-trivial amount of work.
Requires code in //chrome?
No
Estimated milestones
Origin trial Android first 130
Origin trial Android last <= 140
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5121935290400768?gate=6201855156420608
<https://chromestatus.com/feature/5121935290400768?gate=6201855156420608>
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