Contact emails...@chromium.org, cl...@chromium.org

Explainer
https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md

Specificationhttps://wicg.github.io/private-network-access

Design docs
https://docs.google.com/document/d/1Q18g4fZoDIYQ9IuxlZTaItgkzfiz_tCqaEAI8J3Y1WY/edit
https://github.com/WICG/private-network-access/blob/main/permission_prompt/security_privacy_self_review.md

Summary

In order to establish connections to devices on a local network that do not
have globally unique names, and therefore cannot obtain TLS certificates,
this feature introduces a new option to `fetch()` to declare a developers'
intent to talk to such a device, a new policy-controlled feature to gate
each sites' access to this capability, and new headers for the server's
preflight response to provide additional metadata.


Blink componentBlink>SecurityFeature>CORS>PrivateNetworkAccess
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ESecurityFeature%3ECORS%3EPrivateNetworkAccess>

TAG reviewhttps://github.com/w3ctag/design-reviews/issues/751

TAG review statusIssues addressed

Chromium Trial NamePrivateNetworkAccessPermissionPrompt

Origin Trial documentation link
https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md

WebFeature UseCounter namekPrivateNetworkAccessPermissionPrompt

Risks


Interoperability and Compatibility



*Gecko*: No signal

*WebKit*: No signal

*Web developers*: Positive (
https://github.com/WICG/private-network-access/issues/23)

*Other signals*:

Ergonomics

This new feature requires users to click on the new permission. This may
lead users to spamming on some websites. However, this is an intentional
move to encourage the websites to provide security context. The origin
trial also aimed to measure the frequency of users getting the permissions.


Activation

No. This feature attempt to bring developers an easier way to restrict
Private Network Access with secure context.


Security

This is a security positive feature.


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?

None


Debuggability

Relevant information (client and resource IP address space) is already
piped into the DevTools network panel. We’ll likely also represent the
permission state in the settings pages.


Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, ChromeOS, Android, and Android WebView)?No

Mac, Windows, Linux, Chrome OS, Fuchsia, Android, WebLayer. Not Android
WebView because of the absence of deprecation trial integration (though
that may be changing soon, see https://crbug.com/1308425). Not iOS because
this requires changes in Blink and the network service, neither of which
are used on iOS.


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?No

https://wpt.fyi/results/fetch/private-network-access/mixed-content-fetch.tentative.https.window.html?label=master&label=experimental&aligned&q=private-network-access


Flag name on chrome://flags

Finch feature nameNone

Non-finch justificationNone

Requires code in //chrome?True

Tracking bughttps://crbug.com/1338439

Sample links
https://drive.google.com/file/d/1pnyQfIsXdtJnZoCBVSt4xim0yXjZ0Aqc/view?usp=sharing

Estimated milestones
Shipping on desktop 123
OriginTrial desktop last 122
OriginTrial desktop first 120
DevTrial on desktop 120

Anticipated spec changes

Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github issues
in the project for the feature specification) whose resolution may
introduce web compat/interop risk (e.g., changing to naming or structure of
the API in a non-backward-compatible way).
None

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5954091755241472

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/6MczoSFGiHo/m/IigYuhu7AwAJ
Intent
to Experiment:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAG-zKU_ZS1ibT9H7e5UmoUF2OfCUq5ocsDHaCoJ2rShmPmAejQ%40mail.gmail.com


This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

-- 
Yifan

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