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Further clarify post-request check #730

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merged 4 commits into from
Jun 6, 2025
Merged

Further clarify post-request check #730

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Further clarify post-request check
TimvdLippe May 30, 2025
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TimvdLippe May 30, 2025
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TimvdLippe Jun 3, 2025
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Update index.bs
antosart Jun 5, 2025
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19 changes: 14 additions & 5 deletions index.bs
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Expand Up @@ -3800,6 +3800,11 @@ Content-Type: application/reports+json
Given a <a for="/">request</a> |request|, a <a>response</a> |response|,
a <a>directive</a> |directive|, and a <a for="/">policy</a> |policy|:

Note: This check needs both |request| and |response| as input
parameters since if |request|'s <a for="request">cryptographic nonce metadata</a>
or <a for="request">integrity metadata</a> matches, then the script is allowed to load
and the check of whether |response|'s url matches the source list is skipped.

1. If |request|'s <a for="request">destination</a> is <a for="request/destination">script-like</a>:

1. Call [=potentially report hash=] with |response|, |request|, |directive| and |policy|.
Expand All @@ -3814,13 +3819,17 @@ Content-Type: application/reports+json
for="request">integrity metadata</a> and this directive's <a
for="directive">value</a> is "`Matches`", return "`Allowed`".

1. If |directive|'s <a for="directive">value</a> contains
"<a grammar>`'strict-dynamic'`</a>":
1. If |directive|'s <a for="directive">value</a> contains a <a>source
expression</a> that is an <a>ASCII case-insensitive</a> match for
the "<a grammar>`'strict-dynamic'`</a>" <a grammar>keyword-source</a>:

1. If |request|'s <a for="request">parser metadata</a> is not
<a>"parser-inserted"</a>, return "`Allowed`".
1. If the |request|'s <a for="request">parser metadata</a> is
<a>"parser-inserted"</a>, return "`Blocked`".

Otherwise, return "`Blocked`".
Otherwise, return "`Allowed`".

Note: "<a grammar>`'strict-dynamic'`</a>" is explained in more detail
in [[#strict-dynamic-usage]].

1. If the result of executing [[#match-response-to-source-list]] on
|response|, |request|, |directive|'s <a for="directive">value</a>,
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