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WalkthroughThe change adds keyring conformance vectors, verifier checks, mutation testing, CI wiring, and documentation. It validates derived-key fingerprints, ordered fallback, obsolete-key rejection, and fingerprint selection. The SDK documentation records shipped keyring support. ChangesKeyring conformance
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to Keyring conformance checks work, but CI does not independently protect one frozen-name validation rule. Add the focused mutation before merge to prevent that guard from silently regressing. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 38.46% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 13 functions across 2 files. (6 skipped: 6 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Inline comments:
In `@sdk-feature-matrix.md`:
- Line 69: Update the “Key rotation” entries in the SDK feature matrix for
Python, Rust, and TypeScript to show unsupported status, removing
shipped-keyring, sequential-attempts, derived-key fingerprint, and
rotation-runbook remediation claims; apply the same correction to the
corresponding rows noted in the review.
In `@tools/encryption-verify.py`:
- Around line 188-190: Update the keyring validation around entries_by_id to
require exactly two entries with distinct IDs k1 and k2 before constructing the
lookup, rejecting duplicate or unsupported IDs. In the vector validation near
the encrypted_with handling, require each frozen vector name to have its
expected encrypted_with value and reject unsupported values instead of treating
every non-k2 value as k1.
- Line 277: Update the success-summary logic around the final print statement so
it does not access doc["keyring"] when that section is absent. Preserve the
validation failure recorded by the earlier validation path and return it
directly instead of raising a KeyError; only include the keyring vector count
when the keyring validation succeeded.
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sdk-feature-matrix.mdtest-vectors/encryption.jsontools/encryption-verify.py
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…ners (LAB-687) CodeRabbit on protocol#60, plus the LAB-687 expert-panel findings that land in the same files (applied together so one agent owns this branch). - tools/encryption-verify.py: keyring block hoisted out of the `cryptography` guard — the stdlib CI lane verified zero keyring vectors while printing "2 keyring vectors verified". Entries must have unique ids including k1/k2 (duplicates no longer collapse). `encrypted_with` resolves against the frozen name and KEYRING_ORDER instead of "anything not k2 is k1". Keyring vectors get the same compressed/format metadata gate as the main loop. Per-vector `key_fingerprint_hex` must select the HKDF-derived key of its entry — a master-key fingerprint cannot select. Unreachable master-fingerprint guard and the tautological standalone `fingerprint_selection` removed. `verify(doc)` split from `main()` so the fixture can be mutated in-memory. - tools/test_encryption_verify.py (new) + verify.yml: mutation suite proves every keyring guard goes red (18 cases seal lane, 15 stdlib), wired ahead of the verifier in both lanes per the repo's existing doctrine. - spec/encryption.md, decisions/key-rotation.md: shipping-status banners reconciled with cachekit-py#261 / cachekit-rs#63 / cachekit-ts#103. This contradiction is what CodeRabbit read as "the matrix over-claims". - sdk-feature-matrix.md ⁵: "TTL grace window" → manual retirement; "cross-SDK conformance vectors" → protocol reference verifier, no SDK consumer yet; runbook link also names its in-repo normative source. - CHANGELOG: LAB-687 entry. CodeRabbit-Resolved: sdk-feature-matrix.md:69:Remove the shipped-keyring and CodeRabbit-Resolved: tools/encryption-verify.py:190:Validate keyring entry car CodeRabbit-Resolved: tools/encryption-verify.py:277:Do not dereference a missi
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Crypto/protocol expert-panel gate — PASS (SHIP)Ran the mandatory crypto/protocol expert panel (bug-hunter, security, code-craftsman, catchphrase) at critical stakes against head No blocking findings.
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Inline comments:
In `@tools/test_encryption_verify.py`:
- Line 75: The frozen-name mutation must use a compound update: copy
encrypted_with, key_fingerprint_hex, cache_key, aad_hex, ciphertext_hex, and
plaintext_hex from k2 while retaining encrypted_with_k1. Update the mutation
associated with FROZEN_KEYRING_VECTORS so fingerprint validation still passes
and rejection occurs only at the mapping guard.
- Line 95: Update the unused lambda parameter in the run call to `_` instead of
`d`, preserving the lambda’s existing behavior while satisfying Ruff’s ARG005
rule.
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.github/workflows/verify.ymlCHANGELOG.mddecisions/key-rotation.mdsdk-feature-matrix.mdspec/encryption.mdtest-vectors/encryption.jsontools/encryption-verify.pytools/test_encryption_verify.py
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CodeRabbit full review of protocol#60 found "encrypted_with contradicts frozen name" was also rejected by the fingerprint guard, so stripping the FROZEN_KEYRING_VECTORS mapping guard left the harness green: it proved a rejection, not the guard. The expert panel on this fix found two siblings in the same dict. All three now escape only when their own guard is stripped: - contradicts frozen name: k1 vector becomes k2 in every field but the frozen name (all-but-name copy, correct by construction; no field list to go stale). - current vector sealed under retired key (new, seal lane): k2 vector carries k1 sealed bytes; encrypted_with is the current entry so the current-only guard is skipped and only the entry-index guard rejects it. The existing k1-carries-k2 case is caught by both guards. - format off-registry: AAD rebuilt for the bogus format so only the FORMAT_REGISTRY check rejects it (stdlib lane; the seal lane decrypt still masks it). - encrypted_with unknown id: documented as not isolating; the mapping and fingerprint guards also reject it. Verified by stripping each guard in turn: exactly one named mutation escapes per guard; intact 19/19 (seal) and 15/15 (stdlib). ruff ARG005 nit (lambda _) taken as-is; the repo has no ruff config, so it is readability, not a rule.
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Adds CI-verified k1/k2 fallback and derived-key fingerprint-selection vectors.\n\nTests: python3 tools/encryption-verify.py --require-seal
Summary by CodeRabbit
Documentation
Tests
Summary
This PR enhances the keyring conformance test vectors in
tools/test_encryption_verify.pyto improve test coverage and precision for the keyring verification guards.Changes
Improved test case isolation
The changes refactor several negative test cases so that each one isolates a specific verification guard, ensuring that a test failure points to the exact guard being validated:
encrypted_with contradicts frozen name: Now transforms k1's vector into k2's vector in every field except its frozenname, so that only theFROZEN_KEYRING_VECTORSmapping guard can reject it. Previously a bareencrypted_withflip would also be caught by the fingerprint guard, making it impossible to detect if the mapping guard were removed.format off-registry: Now rebuilds the AAD for the boguspickleformat so the AAD guard passes, ensuring only theFORMAT_REGISTRYcheck rejects it in the stdlib lane.New test case
current vector sealed under retired key: Adds a new seal-lane vector where the current entry carries k1's sealed bytes. Sinceencrypted_withisKEYRING_ORDER[0], the current-only guard is skipped, so this specifically exercises the entry-index guard.Refactoring
swap_k1_payload_for_k2helper function with an inline lambda using a sharedPAYLOAD_FIELDSconstant, reducing duplication across payload-swapping test cases.dto_.Purpose
These changes make the conformance vectors more precise, ensuring each negative test case validates a single specific guard rather than being caught by multiple guards. This strengthens the test suite's ability to detect regressions if any individual verification guard were weakened or removed.