Introduce COEP #5454

yutakahirano · 2020-04-13T09:23:36Z

Merging https://github.com/WICG/cross-origin-embedder-policy to the HTML spec.

HTML (this PR)
- Define "embedder policy", document's embedder policy,
  WorkerGlobalScope's embedder policy, and environment settings
  object's embedder policy.
- Specify how to parse a cross-origin-embedder-policy HTTP header.
- Specify how to set embedder policies for documents and workers (except
  for service workers).
fetch: Integrate CORP and COEP fetch#1030
- Define response URL serialization for reporting.
- Modify the cross-origin resource policy check.
- Run a cross-origin resource policy check for a response coming from
  a service worker.
service worker: Introduce Cross-Origin Embedder Policy w3c/ServiceWorker#1516
- Define ServiceWorkerGlobalScope's embedder policy.
- Specify how to set embedder policy for service workers.
- Add a cross-origin resource policy check call in the Cache.matchAll
  algorithm.
worklet: Define COEP for worklet environment settings object w3c/css-houdini-drafts#992
- Define WorkletWorkerGlobalScope's embedder policy.

This fixes #5368, #5634, whatwg/fetch#985, and w3c/ServiceWorker#1490.

This doesn't fix the following issues:

At least two implementers are interested (and none opposed):
- Chrome
- Firefox
Tests are written and can be reviewed and commented upon at:
- html/cross-origin-embedder-policy
Implementation bugs are filed:
- Chrome: https://bugs.chromium.org/p/chromium/issues/detail?id=887967
- Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1613061
- Safari: https://bugs.webkit.org/show_bug.cgi?id=210481

(See WHATWG Working Mode: Changes for more details.)

/browsers.html ( diff )
/browsing-the-web.html ( diff )
/dom.html ( diff )
/history.html ( diff )
/iana.html ( diff )
/index.html ( diff )
/infrastructure.html ( diff )
/offline.html ( diff )
/origin.html ( diff )
/references.html ( diff )
/webappapis.html ( diff )
/window-object.html ( diff )
/workers.html ( diff )

yutakahirano · 2020-04-13T12:55:27Z

@annevk @mikewest PTAL.

I'm planning to send multiple smaller PRs rather than one gigantic PR. If you prefer otherwise, please let me know.

annevk · 2020-04-14T15:27:49Z

@domenic should weigh in I suspect, but in general we want commits to be able to stand on their own. Perhaps things can be split where infrastructure and requirements land after each other, but the moment a following commit is needed for a prior commit to make sense there's a problem of sorts.

domenic · 2020-04-14T15:30:06Z

Also note that every time you push a commit (or collection of commits) it sends an email to the 391 watchers of the repo. Not a big deal, but perhaps consider working on things locally until they're ready, instead of continually pushing "fix" commits.

yutakahirano · 2020-04-14T15:51:06Z

Also note that every time you push a commit (or collection of commits) it sends an email to the 391 watchers of the repo. Not a big deal, but perhaps consider working on things locally until they're ready, instead of continually pushing "fix" commits.

This PR was a "draft PR" until I uploaded the last commit. Is notification sent for draft PRs?

domenic · 2020-04-14T15:52:21Z

Yep! All that does is prevent merging.

yutakahirano · 2020-04-14T15:54:03Z

Oh I didn't know that. Sorry, and thank you.

domenic · 2020-05-19T15:16:18Z

What is our current status here? @yutakahirano, would you like review on what you've done so far, or were you planning on adding the rest into this PR? I tend to agree with @annevk that we should only merge when everything is present, but we could do some early review.

yutakahirano · 2020-05-20T05:57:08Z

As you prefer a big one change I'll do that. I have some time this and next weeks so hopefully I will be able to upload something ready for review.

yutakahirano · 2020-05-25T12:23:24Z

I think this is now ready for review. Some checks were not successful but the error message was "/bin/sh: 1: /whatwg/wattsi/build.sh: not found" so think it is an infra issue.

I simplified and inlined Initializing a global object’s Embedder policy.

I put helper algorithms (e.g., "queue a Cross-Origin Embedder Policy violation on worker initialization") closer to their callers. If you think it's better to group them into one place, I'll do that.

domenic

Great work! Mostly typographical issues. I'm happy for you to do one pass and then I or another editor can do any final touchups.

source

yutakahirano · 2020-05-29T14:52:00Z

I believe I've addressed the comments.

domenic

OK, I pushed some editorial tweaks and also added the full header definition. This LGTM.

However, it seems like we should hold off merging until some of the following are done:

Define "Request URL serialization for reporting" fetch#1028
https://wicg.github.io/cross-origin-embedder-policy/#integration-fetch is merged into Fetch (or maybe we merge both PRs at the same time?)
https://wicg.github.io/cross-origin-embedder-policy/#integration-sw has a PR out for service worker
A PR is out for service worker adding the new environment settings object field (embedder policy)
A PR is out for worklets adding the new environment settings object field (embedder policy)

Does that seem right?

domenic · 2020-05-29T19:31:26Z

Are we planning to restrict COEP to secure contexts? I don't see that here. #4930 indicates that it might be the plan though. If so, this is probably blocked by #5558...

This is part of whatwg/html#5454.

yutakahirano · 2020-06-01T07:22:57Z

Thank you!

https://wicg.github.io/cross-origin-embedder-policy/#integration-fetch is merged into Fetch (or maybe we merge both PRs at the same time?)

Is it possible to have a reference from fetch to the HTML without this change (e.g., <a for="embedder policy">reporting value</a>? I failed to build the fetch spec locally...

yutakahirano · 2020-06-01T09:24:23Z

I plan to introduce the secure-context restriction (#4930) and more reporting properties (#5391) after this is merged.

This is part of the introduction of COEP (whatwg/html#5454). The CORP check now takes COEP into account. Also, responses coming from service workers are checked.

domenic · 2020-06-01T13:48:46Z

Is it possible to have a reference from fetch to the HTML without this change (e.g., <a for="embedder policy">reporting value</a>? I failed to build the fetch spec locally...

It is not; we'd need to merge HTML first then give things ~24 hours to propagate to the cross-linking databases. So I guess we should merge the HTML PR first. Does the Fetch PR build entirely on top of the HTML PR, or would it be better to land them both as close together as possible?

What is the complete list of terms you'll want to reference from Fetch? You need to manually mark them up using data-export="" and data-dfn-for="...", which is a bit fiddly. I can help if you'd like.

I plan to introduce the secure-context restriction (#4930) and more reporting properties (#5391) after this is merged.

I am a bit worried about not introducing the secure context restriction in the initial PR. But maybe it is fine. @annevk any thoughts?

This is part of the introduction of COEP (whatwg/html#5454). The CORP check now takes COEP into account. Also, responses coming from service workers are checked.

yutakahirano · 2020-06-10T09:27:16Z

Updated. Here is the change log from the last round:

Provide response rather than request to the CORP check, to be aligned with Integrate CORP and COEP fetch#1030.
Use serialize-a-response-to-url-for-reporting rather than serialize-a-request-to-url-for-reporting.
Move the CORP check a bit so that we can check redirects.
Add a link to https://dom.spec.whatwg.org/#concept-document-origin.

PTAL again.

annevk

I'm a bit confused now as I see this now includes reporting for navigation as well.

source

annevk · 2020-06-10T13:03:02Z

source

+   <dt>"<dfn data-x="coep-unsafe-none" data-export="" data-dfn-for="embedder policy value"><code
+   data-x="">unsafe-none</code>"</dfn></dt>
+   <dd><p>This is the default value. When this value is used, cross-origin resources can be fetched
+   without giving explicit permission through the <span>CORS protocol</span> or the


The CORS protocol is not at all involved, right? It seems this is old text that didn't account for the switch to CORP.

What I want to say here is, with cross-origin-embedder-policy: require-corp, all cross-origin requests should be verified by CORS or CORP.

But that's not what it's saying, right?

This sentence is about "unsafe-none", so cross-origin resources that are not verified by CORS or CORP can be fetched... Does this answer your question?

source

yutakahirano · 2020-06-11T08:02:52Z

Defined the "coep" report type, to address #5634. cc: @jugglinmike

I'm a bit confused now as I see this now includes reporting for navigation as well.

Anne, I don't understand this comment. Could you rephrase it?

annevk · 2020-06-12T11:00:02Z

From a clarity perspective, I'd like OP to be updated and indicate which of topic: cross-origin-embedder-policy Issues and ideas around the new "require CORP for subresource requests and frames and etc" proposal. is being fixed here and which will remain. It would also be good to have a tentative commit message there briefly explaining how this is split across standards.

My question with respect reporting is that Fetch also includes COEP reporting for navigation, so I'm wondering why there's an algorithm here as well and how they differ.

yutakahirano · 2020-06-15T08:24:30Z

Updated the PR description.

My question with respect reporting is that Fetch also includes COEP reporting for navigation, so I'm wondering why there's an algorithm here as well and how they differ.

There are two checks in the navigation process. One is the CORP check for the navigation and that will be covered by the fetch spec (the call site will exist in the HTML spec). The other is checking the parent COEP and the child COEP. They are checking different things each other, and violation reports are made independently.

yutakahirano · 2020-06-17T09:02:28Z

Anne, have your comments and questions been addressed?

domenic

I did a final pass and pushed some very minor nit fixes. This looks good to me, although I guess we should try to land this around the same time as whatwg/fetch#1030 because of the modified CORP check.

yutakahirano · 2020-06-22T08:58:36Z

Thank you! Do you think it's good to start adding links whatwg/fetch#1030 before landing this? I'm asking because my ability to find and fix problems hugely rely on the build and preview tools.

domenic · 2020-06-22T14:49:44Z

Probably it's best to wait until the review is done there, so that you can add the links in a single commit and not have to go back and change anything else.

# This is the 1st commit message: # This is a combination of 23 commits. # This is the 1st commit message: Integrate CORP and COEP This is part of the introduction of COEP (whatwg/html#5454). The CORP check now takes COEP into account. Also, responses coming from service workers are checked. # This is the commit message #2: Update fetch.bs Co-authored-by: Domenic Denicola <d@domenic.me> # This is the commit message #3: Update fetch.bs Co-authored-by: Domenic Denicola <d@domenic.me> # This is the commit message #4: fix # This is the commit message #5: fix # This is the commit message #6: fix # This is the commit message #7: fix # This is the commit message #8: fix # This is the commit message #9: fix # This is the commit message #10: fix # This is the commit message #11: fix # This is the commit message #12: fix # This is the commit message #13: fix # This is the commit message #14: fix # This is the commit message #15: fix # This is the commit message #16: fix # This is the commit message #17: fix # This is the commit message #18: Update fetch.bs Co-authored-by: Anne van Kesteren <annevk@annevk.nl> # This is the commit message #19: Update fetch.bs Co-authored-by: Anne van Kesteren <annevk@annevk.nl> # This is the commit message #20: fix # This is the commit message #21: fix # This is the commit message #22: fix # This is the commit message #23: fix # This is the commit message #2: fix

This merges much of https://wicg.github.io/cross-origin-embedder-policy/ into the HTML Standard.

domenic · 2020-06-24T18:29:57Z

I rebased this on master (where COOP was merged), and fixed several merge conflicts (both literal, and more indirect ones, e.g. the COOP PR referenced https://wicg.github.io/cross-origin-embedder-policy/ and I updated those sections to point to the appropriate definitions here instead). I squashed all that work into a single commit to make rebasing easier.

I also pushed an additional commit that splits the new section into a couple subsections, to be symmetrical with the COOP section.

So this looks good to go from my end. I'd like @annevk to coordinate merging this and reviewing/merging whatwg/fetch#1030. (As mentioned above, the plan is to merge this first and then update the Fetch PR with cross-links and merge it once the linking databases populate. But we probably shouldn't merge this until the Fetch PR is approved-modulo-crosslinks.)

Note that @yutakahirano's OP has a great amount of detail which will make it easy to write a useful commit message when we merge this.

annevk

Thanks @yutakahirano for all your work on this! Let's land it.

annevk · 2020-06-25T16:24:02Z

Tentative commit message:

Add cross-origin embedder policy

Merges https://github.com/WICG/cross-origin-embedder-policy into HTML.

Associated PRs:

* https://github.com/whatwg/fetch/pull/1030
* https://github.com/w3c/ServiceWorker/pull/1516
* https://github.com/w3c/css-houdini-drafts/pull/992

Fixes #5368, fixes #5634, fixes https://github.com/whatwg/fetch/issues/985, and fixes https://github.com/w3c/ServiceWorker/issues/1490.

Follow-up: #4916, #4919, #4930 #5223, and #5391. (As well as defining cross-origin isolated as per #4732.)

yutakahirano · 2020-06-26T04:26:38Z

Thank you!

This adds support for cross-origin embedding policy, which primarily is a way of enforcing the Cross-Origin-Resource-Policy header to be set on responses. See also this HTML change which links tests and the various issues and standards efforts involved here: whatwg/html#5454. The earlier added "serialize a request URL for reporting" has been replaced with "serialize a response URL for reporting" as centering things around responses was found more logical.

* Introduce Cross-Origin Embedder Policy This is part of whatwg/html#5454. - Define embedder policy in environment settings object for service workers. - Add the CORP check in #dom-cache-matchall. * fix * fix * fix * fix * fix * fix

yutakahirano changed the title ~~[NOT REDAY FOR REVIEW YET] Introduce COEP~~ Introduce COEP Apr 13, 2020

yutakahirano marked this pull request as ready for review April 13, 2020 12:54

mikewest mentioned this pull request May 6, 2020

Fix coep violation report type for CORP WICG/cross-origin-embedder-policy#12

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yutakahirano force-pushed the yhirano/coep-def branch from 44cf23b to 48d6105 Compare May 25, 2020 11:46

domenic reviewed May 27, 2020

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yutakahirano mentioned this pull request May 29, 2020

Define "Request URL serialization for reporting" whatwg/fetch#1028

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domenic added addition/proposal New features or enhancements topic: cross-origin-embedder-policy Issues and ideas around the new "require CORP for subresource requests and frames and etc" proposal. do not merge yet Pull request must not be merged per rationale in comment labels May 29, 2020

domenic mentioned this pull request May 29, 2020

Add more information to COEP reporting #5391

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yutakahirano added a commit to yutakahirano/css-houdini-drafts that referenced this pull request Jun 1, 2020

Define COEP for worklet environment settings object

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This is part of whatwg/html#5454.

yutakahirano mentioned this pull request Jun 1, 2020

Define COEP for worklet environment settings object w3c/css-houdini-drafts#992

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yutakahirano added a commit to whatwg/fetch that referenced this pull request Jun 1, 2020

Integrate CORP and COEP

809385a

This is part of the introduction of COEP (whatwg/html#5454). The CORP check now takes COEP into account. Also, responses coming from service workers are checked.

yutakahirano mentioned this pull request Jun 1, 2020

Integrate CORP and COEP whatwg/fetch#1030

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yutakahirano added a commit to whatwg/fetch that referenced this pull request Jun 4, 2020

Integrate CORP and COEP

a6822f2

This is part of the introduction of COEP (whatwg/html#5454). The CORP check now takes COEP into account. Also, responses coming from service workers are checked.

yutakahirano mentioned this pull request Jun 8, 2020

Raise the bar for SharedArrayBuffer via postMessage() #4734

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yutakahirano mentioned this pull request Jun 11, 2020

COEP: Should reports be visible to reporting observers? #5634

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domenic approved these changes Jun 19, 2020

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domenic mentioned this pull request Jun 19, 2020

Cross origin opener policy reporting #5518

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domenic force-pushed the yhirano/coep-def branch from ff85f47 to f833ad9 Compare June 24, 2020 18:12

yutakahirano and others added 2 commits June 24, 2020 14:18

Introduce COEP

069e03f

This merges much of https://wicg.github.io/cross-origin-embedder-policy/ into the HTML Standard.

Rearrange a bit to be symmetrical with COOP

770ea12

domenic force-pushed the yhirano/coep-def branch from f833ad9 to 770ea12 Compare June 24, 2020 18:25

domenic assigned annevk Jun 24, 2020

domenic mentioned this pull request Jun 25, 2020

Update "structured header" references to "structured fields" #5676

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domenic merged commit 70b8bb4 into whatwg:master Jun 25, 2020

yutakahirano deleted the yhirano/coep-def branch June 26, 2020 04:26

yutakahirano mentioned this pull request Aug 20, 2020

Augment COEP violation report #5848

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Enforce COEP in SharedWorker mozilla/standards-positions#577

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Introduce COEP #5454

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