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VEX Issuer Identity Verification

Module

Excititor

Status

IMPLEMENTED

Description

Cryptographic verification of VEX issuer identities with signature verification, issuer directory lookup, verification caching, and configurable verification options.

Implementation Details

  • Modules: src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/, src/Excititor/__Libraries/StellaOps.Excititor.Connectors.Abstractions/Trust/
  • Key Classes:
    • IssuerDirectoryClient (src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/IssuerDirectoryClient.cs) - looks up issuer public keys from the issuer directory
    • ProductionVexSignatureVerifier (src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/ProductionVexSignatureVerifier.cs) - verifies VEX document signatures against issuer keys
    • VerificationCacheService (src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/VerificationCacheService.cs) - caches issuer verification results
    • VexSignatureVerifierOptions (src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/VexSignatureVerifierOptions.cs) - configurable verification options
    • ConnectorSignerMetadata (src/Excititor/__Libraries/StellaOps.Excititor.Connectors.Abstractions/Trust/ConnectorSignerMetadata.cs) - signer metadata for connector-level trust
    • ConnectorSignerMetadataEnricher (src/Excititor/__Libraries/StellaOps.Excititor.Connectors.Abstractions/Trust/ConnectorSignerMetadataEnricher.cs) - enriches connector metadata with signer info
  • Interfaces: IVexSignatureVerifierV2
  • Source: Feature matrix scan

E2E Test Plan

  • Verify IssuerDirectoryClient looks up issuer public keys from the issuer directory service
  • Verify ProductionVexSignatureVerifier validates a VEX document signed by a known issuer
  • Verify rejection when a VEX document is signed by an unknown issuer not in the directory
  • Verify VerificationCacheService caches issuer lookup results and returns cached results on repeat queries
  • Verify ConnectorSignerMetadataEnricher enriches connector metadata with signer identity info
  • Verify VexSignatureVerifierOptions allows configuring verification strictness (strict, permissive, disabled)