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0.104.0-alpha.8: reject cert paths containing distrusted SPKIs - #545

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ctz merged 2 commits into
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ci/filter-intermediate-spki
Oct 20, 2026
Merged

ctz merged 2 commits into
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ci/filter-intermediate-spki

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@cpu

@cpu cpu commented Oct 20, 2026 •

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Match SPKI bytes throughout the path, including leaves and trust anchors against a static list of distrusted keys. Keys that match are rejected as distrusted for path building purposes. We don't have convenient handle on a CryptoProvider to hash arbitrary data to block by SPKI digest, so this is the next best option.

Proposed release notes:

Distrust a small set of intermediate certificate subject public keys due to specific security concerns around their operation.

Match SPKI bytes throughout the path, including leaves and trust
anchors against a static list of distrusted keys. Keys that match are
rejected as distrusted for path building purposes.
@cpu cpu self-assigned this Oct 20, 2026
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codecov Bot commented Oct 20, 2026 •

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.69%. Comparing base (d62e12c) to head (fd0fd6b).

Additional details and impacted files
@@            Coverage Diff             @@
##             main     #545      +/-   ##
==========================================
+ Coverage   97.63%   97.69%   +0.05%     
==========================================
  Files          20       20              
  Lines        4106     4204      +98     
==========================================
+ Hits         4009     4107      +98     
  Misses         97       97              

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@cpu cpu changed the title reject cert paths containing distrusted SPKIs 0.104.0-alpha.8: reject cert paths containing distrusted SPKIs Oct 20, 2026

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Thanks! Will roll the release for this and the backport.

@ctz
ctz added this pull request to the merge queue Oct 20, 2026
Merged via the queue into main with commit 4657021 Oct 20, 2026
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@ctz
ctz deleted the ci/filter-intermediate-spki branch October 20, 2026 08:50
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2 participants