Contact emailsyoavwe...@chromium.org

Explainerhttps://github.com/w3c/webappsec-subresource-integrity/pull/133

Specificationhttps://github.com/w3c/webappsec-subresource-integrity/pull/133

Summary

Subresource-Integrity (SRI) enables developers to make sure the assets they
intend to load are indeed the assets they are loading. But there's no
current way for developers to be sure that all of their scripts are
validated using SRI. The Integrity-Policy header gives developers the
ability to assert that every resource of a given type needs to be
integrity-checked. If a resource of that type is attempted to be loaded
without integrity metadata, that attempt will fail and trigger a violation
report.


Blink componentBlink>SecurityFeature>Subresource Integrity
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ESecurityFeature%3ESubresource%20Integrity%22>

TAG reviewhttps://github.com/w3ctag/design-reviews/issues/1048

TAG review statusPending

Risks


Interoperability and Compatibility

None. This is a new header, so it has no compatibility concerns. In terms
of interoperability, despite the lack of official position, this was
co-designed with Mozilla folks, and they are planning
<https://github.com/w3c/webappsec-subresource-integrity/pull/133#discussion_r2046860967>
to follow suite AFAIK.


*Gecko*: No signal (
https://github.com/mozilla/standards-positions/issues/1173) The syntax was
collaboratively worked on with Mozilla folks and was adapted to be
future-compatible with their plans on that front. At the same time, no
official signal just yet.

*WebKit*: No signal (
https://github.com/WebKit/standards-positions/issues/458) "reasonable
problem to solve" but no official signal yet.

*Web developers*: Positive - Shopify is highly interested in this. I
suspect other developers who have to deal with PCI compliance would as
well. (there's also an ancient signal from Github
<https://lists.w3.org/Archives/Public/public-webappsec/2015Dec/0045.html>)

*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?

None


Debuggability

None


Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, ChromeOS, Android, and Android WebView)?Yes

Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes

https://chromium-review.googlesource.com/c/chromium/src/+/6408111


Flag name on about://flagsNone

Finch feature nameIntegrityPolicyScripts

Rollout planWill ship enabled for all users

Requires code in //chrome?False

Estimated milestones
Shipping on desktop 137
Shipping on Android 137
Shipping on WebView


137I'm aware 137 is... ambitious, given the code hasn't landed yet. But I'm
trying to reduce the delay the API shape change incurred.

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/5178394056327168?gate=5167118408220672

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

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