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fix(dsa): validate imports and prove interoperability - #189
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Share bounded borrowed PKCS#8 validation across native signing and key-manager imports, reject inconsistent optional public components, and zeroize PEM buffers. Prove reciprocal DSA signing and verification with xmlsec1 1.3.13 for 1024, 2048 and 3072-bit keys, including raw widths, embedded keys, tampering and policy refusals. Closes #188
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughDSA PKCS#8 imports now use shared preflight checks and decoding for signing keys and key-manager identity matching. Tests cover import validation and reciprocal DSA signing and verification with xmlsec1 for 1024-, 2048-, and 3072-bit keys. ChangesDSA import and interoperability
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant XmlSec as xml-sec
participant Xmlsec1 as xmlsec1
participant Resolver as Key resolver
XmlSec->>Xmlsec1: Provide xml-sec-generated DSA signature
Xmlsec1-->>XmlSec: Return verification result
Xmlsec1->>XmlSec: Provide xmlsec1-generated DSA signature
XmlSec->>Resolver: Resolve DSAKeyValue
Resolver-->>XmlSec: Return DSA public key
XmlSec->>XmlSec: Verify signature with resolved key
Merge Risk: ⚪ Minimal · up to No actionable merge-blocking issue is identified in the supplied changes. The PR is mergeable after normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change strengthens key validation while preserving existing usage, resource, and certificate-matching controls. No introduced security concern was established in the traced import paths; broader deployment exposure remains unassessed. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 72.73% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 22 functions across 6 files. (1 skipped: 1 unsupported.)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @src/xmldsig/sign.rs:
- Around line 1008-1013: Update the unencrypted `DsaSigningKey::from_pkcs8_pem`
constructor to return `InvalidKeyPem` when PEM parsing fails and
`InvalidKeyFormat { label }` when the parsed label is not `PRIVATE KEY`. Leave
the encrypted DSA PEM constructor’s error mapping unchanged.
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⛔ Files ignored due to path filters (3)
tests/fixtures/xmldsig/keys/dsa/dsa-1024-pubkey.pemis excluded by!**/*.pemtests/fixtures/xmldsig/keys/dsa/dsa-2048-pubkey.pemis excluded by!**/*.pemtests/fixtures/xmldsig/keys/dsa/dsa-3072-pubkey.pemis excluded by!**/*.pem
📒 Files selected for processing (9)
docs/xmldsig.mdscripts/import-donor-fixtures.shsrc/key_manager.rssrc/xmldsig/sign.rssrc/xmldsig/signature.rstests/fixtures/xmldsig/keys/dsa/dsa-1024-key.p8-dertests/fixtures/xmldsig/keys/dsa/dsa-3072-key.p8-dertests/fixtures_smoke.rstests/xmlsec1_interop.rs
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Summary
Validation
Closes #188
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