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Support multiple transparency log entries - #1913

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jhang01 wants to merge 1 commit into
sigstore:mainfrom
jhang01:fix/tlog-threshold
Closed

jhang01 wants to merge 1 commit into
sigstore:mainfrom
jhang01:fix/tlog-threshold

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@jhang01

@jhang01 jhang01 commented Sep 23, 2026

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Summary

Bundles can contain multiple transparency log entries, but the verifier currently rejects anything other than exactly one.

This adds threshold-based tlog verification, defaulting to 1. Thresholds greater than 1 count distinct operators, and are rejected when matching legacy trust-root entries do not provide operator metadata.

Also adds Verifier(tlog_threshold=...) and --tlog-threshold.

Tests:

  • make lint
  • make check-readme with Python 3.10
  • make test

Closes #1821.

Release Note

Added support for multiple transparency log entries and configurable transparency log verification thresholds.

Documentation

Updated the CLI help in the README. No separate documentation changes required.

Signed-off-by: Jason Hang <jasonhang@outlook.com>
@woodruffw woodruffw closed this Sep 23, 2026
@sigstore sigstore locked as spam and limited conversation to collaborators Sep 23, 2026
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Verfier rejects valid bundles with more than one tlog entry

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