Skip to content

Add 'unsafe-webtransport-hashes' keyword to connect-src #791

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Add 'unsafe-webtransport-hashes' keyword to connect-src #791

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
d8953ae
Add 'unsafe-webtransport-hashes' keyword to connect-src
jan-ivar Nov 25, 2025
5cfea89
fix line number
jan-ivar Nov 25, 2025
d0d230a
Address review feedback
jan-ivar Nov 25, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
61 changes: 50 additions & 11 deletions index.bs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -696,7 +696,7 @@ spec:SRI; urlPrefix: https://w3c.github.io/webappsec-subresource-integrity
/ "<dfn>'report-sample'</dfn>" / "<dfn>'unsafe-allow-redirects'</dfn>"
/ "<dfn>'wasm-unsafe-eval'</dfn>" / "<dfn>'trusted-types-eval'</dfn>"
/ "<dfn>'report-sha256'</dfn>" / "<dfn>'report-sha384'</dfn>"
/ "<dfn>'report-sha512'</dfn>"
/ "<dfn>'report-sha512'</dfn>" / "<dfn>'unsafe-webtransport-hashes'</dfn>"

ISSUE: Bikeshed `unsafe-allow-redirects`.

Expand Down Expand Up @@ -2215,14 +2215,23 @@ Content-Type: application/reports+json
1. Let |name| be the result of executing
[[#effective-directive-for-a-request]] on |request|.

2. If the result of executing [[#should-directive-execute]] on |name|,
1. If the result of executing [[#should-directive-execute]] on |name|,
`connect-src` and |policy| is "`No`", return "`Allowed`".

3. If the result of executing [[#match-request-to-source-list]] on
|request|, this directive's <a for="directive">value</a>, and
|policy|, is "`Does Not Match`", return "`Blocked`".
1. Let |source list| be directive's <a for="directive">value</a>.

4. Return "`Allowed`".
1. If the result of executing [[#match-request-to-source-list]] on
|request|, |source list|, and |policy|, is "`Matches`", return
"`Allowed`".

1. If |request|'s [=request/mode=] is "`webtransport`", |request|'s
<a for="request">unsafe-webtransport-hashes</a> is not empty, and
|source list| [=list/contains=] a <a>source expression</a> which
is an <a>ASCII case-insensitive</a> match for the
<a grammar>`keyword-source`</a>
"<a grammar>`'unsafe-webtransport-hashes'`</a>", return "`Allowed`".

1. Return "`Blocked`".

<h5 algorithm id="connect-src-post-request">
`connect-src` Post-request check
Expand All @@ -2236,14 +2245,23 @@ Content-Type: application/reports+json
1. Let |name| be the result of executing
[[#effective-directive-for-a-request]] on |request|.

2. If the result of executing [[#should-directive-execute]] on |name|,
1. If the result of executing [[#should-directive-execute]] on |name|,
`connect-src` and |policy| is "`No`", return "`Allowed`".

3. If the result of executing [[#match-response-to-source-list]] on
|response|, |request|, this directive's <a for="directive">value</a>,
and |policy|, is "`Does Not Match`", return "`Blocked`".
1. Let |source list| be directive's <a for="directive">value</a>.

4. Return "`Allowed`".
1. If the result of executing [[#match-response-to-source-list]] on
|response|, |request|, |source list|, and |policy|, is "`Matches`",
return "`Allowed`".

1. If |request|'s [=request/mode=] is "`webtransport`", |request|'s
<a for="request">unsafe-webtransport-hashes</a> is not empty, and
|source list| [=list/contains=] a <a>source expression</a> which
is an <a>ASCII case-insensitive</a> match for the
<a grammar>`keyword-source`</a>
"<a grammar>`'unsafe-webtransport-hashes'`</a>", return "`Allowed`".

1. Return "`Blocked`".

<h4 id="directive-default-src">`default-src`</h4>

Expand Down Expand Up @@ -4262,6 +4280,27 @@ Content-Type: application/reports+json
9. Return "`Matches`".
</ol>

<h5 id="allow-unsafe-webtransport-hashes" algorithm>
Copy link
Member

@antosart antosart Nov 26, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I think this algorithm is not needed anymore

Does a source list allow unsafe WebTransport hashes?
</h5>

A <a>source list</a>
<dfn export for="source list" local-lt="allow unsafe WebTransport hashes">allows unsafe WebTransport hashes</dfn>
if it contains the <a grammar>`keyword-source`</a>
expression <a grammar>`'unsafe-webtransport-hashes'`</a>, as described in the following
algorithm:

Given a <a>source list</a> |list|, the following
algorithm returns "`Allows`" if allowed and "`Does Not Allow`" otherwise.

1. <a for=set>For each</a> |expression| of |list|:

1. If |expression| is an <a>ASCII case-insensitive</a> match for the
<a grammar>`keyword-source`</a> "<a grammar>`'unsafe-webtransport-hashes'`</a>",
return "`Allows`".

2. Return "`Does Not Allow`".

<h4 id="matching-elements">Element Matching Algorithms</h4>

<h5 id="is-element-nonceable" algorithm>
Expand Down
Loading