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

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

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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
27c3925
Remove separate "allow-unsafe-webtransport-hashes" algorithm in the end
jan-ivar Dec 2, 2025
a60894e
Rename to request.webtransport-hashes (unsafe makes sense in csp cont…
jan-ivar Dec 2, 2025
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40 changes: 29 additions & 11 deletions index.bs
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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">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">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
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