fix(logger)!: name key material instead of a bare "key" needle - #1106
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WalkthroughThe default log filter no longer masks every field containing ChangesSensitive-field filtering
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟠 High · up to This PR intentionally narrows default log redaction, so fields such as license keys, HMAC keys, vendor subscription headers, or private key containers may be written in clear unless each deployment audits and extends its configuration. Because the migration preflight can miss field names and verification guidance needs synthetic-value coverage, the change carries high merge-readiness risk and should not merge until those safeguards are strengthened or explicitly accepted by the responsible owners. Poem
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In `@wiki/migrations.md`:
- Around line 3709-3712: Update the verification guidance to require a
synthetic, non-production secret value and a staging or disposable logger when
the secret field is unconfigured, so plaintext logging cannot expose a real
credential.
- Around line 3664-3671: Expand the C60.13 detection step in the migration
documentation beyond double-quoted literals to cover raw literals, constants,
variables, map keys, and helper-generated field names, while retaining the
required log-backend audit for masked fields containing key-related names.
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keystore/module.gologger/filter.gologger/filter_test.gowiki/adr_072_default_log_filter_names_key_material_explicitly.mdwiki/architecture_decisions.mdwiki/migrations.mdwiki/observability.md
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DefaultFilterConfig masks a log value when its FIELD NAME matches a needle, case-insensitively, by substring. The list carried a bare "key", so every field whose name merely contained the word was masked: "keys", "tenant_key", "cache_key", "routing_key", and the plain "key" the framework logs at fifteen of its own sites — fourteen a tenant or resource identifier, one the name of a reserved envelope-meta key. All rendered ***, and the YAML seam only ADDS needles, so no consumer could unmask one without abandoning the default list wholesale. Key material is named needle by needle instead: private_key, signing_key, encryption_key and api_key, each in three spellings — underscore, concatenated, and hyphenated — because the matcher relates them not at all. secret_key and secretkey get no entry; the "secret" needle already covers both, and adding them would read as coverage while being dead weight. The hyphenated spellings are not tidiness. httpclient logs whole http.Header maps through this filter under LogPayloads, and the header is spelled X-Api-Key, which the bare needle masked and no underscore needle does. A single "-key" needle would catch every such header and also mask Idempotency-Key — an identifier consumers send on every payment POST, and exactly the over-masking this change exists to end. This UN-MASKS, which is the whole risk: a field the new list does not name — license_key, hmac_key, Ocp-Apim-Subscription-Key — starts logging in clear on upgrade with no error and no warning. Documented as ADR-072 and migration atom C60.13, whose gate names both directions and whose remedy is one line of log.sensitivefields. The security gate found one shape worth calling out separately: "keys" is the JWKS container. The bare needle stopped the filter's walk there; now it recurses, and a JWK's "d" — the RSA private exponent — matches no needle. Reachable only through LogPayloads, which is off by default and documented dev-only, and named in both the ADR and the atom. Also from the gates: keystore/module.go's "name, not key" comment cited the bare needle as its reason, which this change removes — the field name is still right, the rationale is now stated as such.
SonarCloud S8193 on the new table test: the `masked` variable existed only to be compared on the same line it was declared. Comparing the expression directly says the same thing in one step. No behavior change; the assertion and its message are unchanged.
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What
logger.DefaultFilterConfigmatches field names by case-insensitive substring, so its barekeyneedle masked every field merely containing the word —keys,tenant_key,cache_key, and the plainkeythe framework logs at fifteen of its own sites — with no way to unmask one short of replacing the whole default list. Key material is now named needle by needle instead:api_key,private_key,signing_key,encryption_key, each in the underscore, concatenated and hyphenated spellings the matcher treats as unrelated.Impact
This un-masks, which is the whole risk: a field matched only by the removed needle —
license_key,hmac_key,Ocp-Apim-Subscription-Key, or the JWKS containerkeys— starts logging in clear on upgrade, silently. ADR-072 and migration atom[C60.13]state both directions; the remedy is onelog.sensitivefieldsentry.secret_keyneeds no needle —secretalready covers it.Verification
make mutateproduced no mutants on the changed lines — the diff is a string-slice literal plus comments — so the pinning is the new table test, which asserts each needle individually and fails if any single one is dropped. Hyphenated coverage exists becausehttpclientlogs wholehttp.Headermaps through this filter underLogPayloads.Closes #1037
Summary by CodeRabbit
Bug Fixes
Documentation