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[Trusted Types / CSP] Make 'allow-duplicate' parsing case-insensitive. #57079

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Merged
chromium-wpt-export-bot merged 1 commit into from
Jan 9, 2026
Merged

[Trusted Types / CSP] Make 'allow-duplicate' parsing case-insensitive. #57079

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22 changes: 22 additions & 0 deletions trusted-types/TrustedTypePolicyFactory-createPolicy-cspTests-case.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
<!DOCTYPE html>
<script src="/resources/testharness.js" ></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.sub.js"></script>
<meta http-equiv="Content-Security-Policy" content="trusted-types * 'aLLow-dUPLIcates'">
<body>
<script>
// CSP3 is defined in terms of RFC 5234 grammars, which states that terminal
// symbols are case-insensitive. So 'allow-duplicates' should be parsed the
// same as 'ALLOW-DUPLICATES'.
//
// Ref:
// - https://www.w3.org/TR/CSP3/#framework-infrastructure
// - https://www.rfc-editor.org/rfc/rfc5234#section-2.3
// - See also: https://github.com/w3c/webappsec-csp/issues/236
test(t => {
window.trustedTypes.createPolicy('SomeName', { createHTML: s => s } );
}, "Can create policy with name 'SomeName'");
test(t => {
window.trustedTypes.createPolicy('SomeName', { createHTML: s => s } );
}, "Can create a second policy with name 'SomeName'");
</script>
21 changes: 21 additions & 0 deletions trusted-types/TrustedTypePolicyFactory-createPolicy-cspTests-case2.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<script src="/resources/testharness.js" ></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.sub.js"></script>
<meta http-equiv="Content-Security-Policy" content="trusted-types 'nONe'">
<body>
<script>
// CSP3 is defined in terms of RFC 5234 grammars, which states that terminal
// symbols are case-insensitive. So 'none' should be parsed the
// same as 'NONE'.
//
// Ref:
// - https://www.w3.org/TR/CSP3/#framework-infrastructure
// - https://www.rfc-editor.org/rfc/rfc5234#section-2.3
// - See also: https://github.com/w3c/webappsec-csp/issues/236
test(t => {
assert_throws_js(TypeError, _ => {
window.trustedTypes.createPolicy('SomeName', { createHTML: s => s } );
});
}, "Cannot create a policy when CSP lists 'none'");
</script>