# Binary Fingerprint Evidence for Reachability Proofs

## Module
Attestor

## Status
VERIFIED

## Description
Binary fingerprint evidence generation with identity info, vulnerability match info, and micro-witness binary references provides cryptographic evidence for binary reachability claims.

## Implementation Details
- **BinaryFingerprintEvidenceGenerator**: `src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Generators/BinaryFingerprintEvidenceGenerator.cs` (with `.Helpers` partial) -- generates attestable fingerprint evidence segments from binary vulnerability findings.
- **BinaryFingerprintEvidencePredicate**: `__Libraries/StellaOps.Attestor.ProofChain/Predicates/BinaryFingerprintEvidencePredicate.cs` -- predicate type for binary fingerprint evidence in proof bundles.
- **BinaryIdentityInfo**: `Predicates/BinaryIdentityInfo.cs` -- captures binary identity (path, hash, format, architecture).
- **BinaryVulnMatchInfo**: `Predicates/BinaryVulnMatchInfo.cs` -- vulnerability match details linking binary to CVE.
- **Micro-Witness Models**: `MicroWitnessBinaryRef.cs` -- binary reference within micro-witness. `MicroWitnessCveRef.cs` -- CVE reference. `MicroWitnessFunctionEvidence.cs` -- function-level evidence. `MicroWitnessSbomRef.cs` -- SBOM cross-reference. `MicroWitnessTooling.cs` -- analysis tool info. `MicroWitnessVerdicts.cs` -- micro-witness verdicts.
- **Binary Micro-Witness Predicate**: `BinaryMicroWitnessPredicate.cs` -- complete micro-witness predicate combining binary evidence with reachability data.
- **Statement**: `__Libraries/StellaOps.Attestor.ProofChain/Statements/BinaryMicroWitnessStatement.cs` -- in-toto statement wrapper.
- **Tests**: `__Tests/StellaOps.Attestor.ProofChain.Tests/BinaryMicroWitnessPredicateTests.cs`

## E2E Test Plan
- [ ] Generate binary fingerprint evidence via `BinaryFingerprintEvidenceGenerator` for a binary with known vulnerabilities and verify the output contains `BinaryIdentityInfo` with correct hash and format
- [ ] Verify `BinaryVulnMatchInfo` correctly links a binary identity to a specific CVE with match confidence
- [ ] Create a `BinaryMicroWitnessPredicate` with `MicroWitnessBinaryRef`, `MicroWitnessCveRef`, and `MicroWitnessFunctionEvidence` and verify all cross-references are populated
- [ ] Verify `MicroWitnessSbomRef` correctly links the binary evidence to an SBOM component entry
- [ ] Wrap the micro-witness predicate in `BinaryMicroWitnessStatement` and verify it produces a valid in-toto statement
- [ ] Generate evidence for a binary with no vulnerability matches and verify the generator produces an empty/clean evidence set
- [ ] Verify `MicroWitnessTooling` captures the analysis tool name and version used to generate the evidence

## Verification

| Check | Result |
|-------|--------|
| Tier 0 - Source Verification | PASS |
| Tier 1 - Build + Code Review | PASS |
| Tier 2 - Behavioral Verification | PASS |
| Verified Date | 2026-02-13 |
| Run ID | run-001 |