save progress
This commit is contained in:
StellaOps Bot
@@ -0,0 +1,351 @@
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# Sprint: Activate VEX Signature Verification Pipeline
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| Field | Value |
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|-------|-------|
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| **Sprint ID** | SPRINT_1227_0004_0001 |
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| **Batch** | 001 - Activate Verification |
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| **Module** | BE (Backend) |
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| **Topic** | Replace NoopVexSignatureVerifier with real verification |
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| **Priority** | P0 - Critical Path |
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| **Estimated Effort** | Medium |
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| **Dependencies** | Attestor.Verify, Cryptography, IssuerDirectory |
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| **Working Directory** | `src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/` |
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---
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## Objective
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Replace `NoopVexSignatureVerifier` with a production-ready implementation that:
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1. Verifies DSSE/in-toto signatures on VEX documents
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2. Validates key provenance against IssuerDirectory
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3. Checks certificate chains for keyless attestations
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4. Supports all crypto profiles (FIPS, eIDAS, GOST, SM)
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---
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## Background
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### Current State
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- `NoopVexSignatureVerifier` always returns `verified: true`
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- `AttestorVerificationEngine` has full verification logic but isn't wired to VEX ingest
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- `IssuerDirectory` stores issuer keys with validity windows and revocation status
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- Signature metadata captured at ingest but not validated
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### Target State
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- All VEX documents with signatures are cryptographically verified
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- Invalid signatures marked `verified: false` with reason
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- Key provenance checked against IssuerDirectory
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- Verification results cached in Valkey for performance
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- Offline mode uses bundled trust anchors
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---
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## Deliverables
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### D1: IVexSignatureVerifier Interface Enhancement
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**File:** `src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/IVexSignatureVerifier.cs`
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```csharp
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public interface IVexSignatureVerifier
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{
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/// <summary>
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/// Verify all signatures on a VEX document.
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/// </summary>
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Task<VexSignatureVerificationResult> VerifyAsync(
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VexRawDocument document,
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VexVerificationContext context,
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CancellationToken ct = default);
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/// <summary>
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/// Batch verification for ingest performance.
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/// </summary>
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Task<IReadOnlyList<VexSignatureVerificationResult>> VerifyBatchAsync(
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IEnumerable<VexRawDocument> documents,
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VexVerificationContext context,
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CancellationToken ct = default);
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}
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public sealed record VexVerificationContext
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{
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public required string TenantId { get; init; }
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public required CryptoProfile Profile { get; init; }
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public DateTimeOffset VerificationTime { get; init; }
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public bool AllowExpiredCerts { get; init; } = false;
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public bool RequireTimestamp { get; init; } = false;
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public IReadOnlyList<string>? AllowedIssuers { get; init; }
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}
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public sealed record VexSignatureVerificationResult
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{
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public required string DocumentDigest { get; init; }
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public required bool Verified { get; init; }
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public required VerificationMethod Method { get; init; }
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public string? KeyId { get; init; }
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public string? IssuerName { get; init; }
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public string? CertSubject { get; init; }
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public IReadOnlyList<VerificationWarning>? Warnings { get; init; }
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public VerificationFailureReason? FailureReason { get; init; }
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public string? FailureMessage { get; init; }
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public DateTimeOffset VerifiedAt { get; init; }
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}
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public enum VerificationMethod
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{
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None,
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Cosign,
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CosignKeyless,
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Pgp,
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X509,
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Dsse,
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DsseKeyless
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}
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public enum VerificationFailureReason
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{
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NoSignature,
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InvalidSignature,
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ExpiredCertificate,
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RevokedCertificate,
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UnknownIssuer,
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UntrustedIssuer,
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KeyNotFound,
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ChainValidationFailed,
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TimestampMissing,
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AlgorithmNotAllowed
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}
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```
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### D2: ProductionVexSignatureVerifier Implementation
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**File:** `src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/ProductionVexSignatureVerifier.cs`
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Core logic:
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1. Extract signature metadata from document
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2. Determine verification method (DSSE, cosign, PGP, x509)
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3. Look up issuer in IssuerDirectory
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4. Get signing key or certificate chain
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5. Verify signature using appropriate crypto provider
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6. Check key validity (not_before, not_after, revocation)
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7. Return structured result with diagnostics
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```csharp
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public sealed class ProductionVexSignatureVerifier : IVexSignatureVerifier
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{
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private readonly IIssuerDirectoryClient _issuerDirectory;
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private readonly ICryptoProviderRegistry _cryptoProviders;
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private readonly IAttestorVerificationEngine _attestorEngine;
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private readonly IVerificationCacheService _cache;
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private readonly VexSignatureVerifierOptions _options;
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public async Task<VexSignatureVerificationResult> VerifyAsync(
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VexRawDocument document,
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VexVerificationContext context,
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CancellationToken ct)
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{
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// 1. Check cache
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var cacheKey = $"vex-sig:{document.Digest}:{context.Profile}";
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if (await _cache.TryGetAsync(cacheKey, out var cached))
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return cached with { VerifiedAt = DateTimeOffset.UtcNow };
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// 2. Extract signature info
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var sigInfo = ExtractSignatureInfo(document);
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if (sigInfo is null)
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return NoSignatureResult(document.Digest);
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// 3. Lookup issuer
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var issuer = await _issuerDirectory.GetIssuerByKeyIdAsync(
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sigInfo.KeyId, context.TenantId, ct);
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// 4. Select verification strategy
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var result = sigInfo.Method switch
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{
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VerificationMethod.Dsse => await VerifyDsseAsync(document, sigInfo, issuer, context, ct),
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VerificationMethod.DsseKeyless => await VerifyDsseKeylessAsync(document, sigInfo, context, ct),
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VerificationMethod.Cosign => await VerifyCosignAsync(document, sigInfo, issuer, context, ct),
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VerificationMethod.Pgp => await VerifyPgpAsync(document, sigInfo, issuer, context, ct),
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VerificationMethod.X509 => await VerifyX509Async(document, sigInfo, issuer, context, ct),
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_ => UnsupportedMethodResult(document.Digest, sigInfo.Method)
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};
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// 5. Cache result
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await _cache.SetAsync(cacheKey, result, _options.CacheTtl, ct);
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return result;
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}
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}
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```
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### D3: Crypto Profile Selection
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**File:** `src/Excititor/__Libraries/StellaOps.Excititor.Core/Verification/CryptoProfileSelector.cs`
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Select appropriate crypto profile based on:
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- Issuer metadata (jurisdiction field)
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- Tenant configuration
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- Document metadata hints
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- Fallback to World profile
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### D4: Verification Cache Service
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**File:** `src/Excititor/__Libraries/StellaOps.Excititor.Cache/VerificationCacheService.cs`
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```csharp
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public interface IVerificationCacheService
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{
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Task<bool> TryGetAsync(string key, out VexSignatureVerificationResult? result);
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Task SetAsync(string key, VexSignatureVerificationResult result, TimeSpan ttl, CancellationToken ct);
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Task InvalidateByIssuerAsync(string issuerId, CancellationToken ct);
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}
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```
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Valkey-backed with:
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- Key format: `vex-sig:{document_digest}:{crypto_profile}`
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- TTL: Configurable (default 4 hours)
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- Invalidation on key revocation events
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### D5: IssuerDirectory Client Integration
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**File:** `src/Excititor/__Libraries/StellaOps.Excititor.Core/Clients/IIssuerDirectoryClient.cs`
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```csharp
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public interface IIssuerDirectoryClient
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{
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Task<IssuerInfo?> GetIssuerByKeyIdAsync(string keyId, string tenantId, CancellationToken ct);
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Task<IssuerKey?> GetKeyAsync(string issuerId, string keyId, CancellationToken ct);
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Task<bool> IsKeyRevokedAsync(string keyId, CancellationToken ct);
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Task<IReadOnlyList<IssuerKey>> GetActiveKeysForIssuerAsync(string issuerId, CancellationToken ct);
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}
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```
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### D6: DI Registration & Feature Flag
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**File:** `src/Excititor/StellaOps.Excititor.WebService/Program.cs`
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```csharp
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if (configuration.GetValue<bool>("VexSignatureVerification:Enabled", false))
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{
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services.AddSingleton<IVexSignatureVerifier, ProductionVexSignatureVerifier>();
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}
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else
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{
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services.AddSingleton<IVexSignatureVerifier, NoopVexSignatureVerifier>();
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}
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```
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### D7: Configuration
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**File:** `etc/excititor.yaml.sample`
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```yaml
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VexSignatureVerification:
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Enabled: true
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DefaultProfile: "world"
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RequireSignature: false # If true, reject unsigned documents
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AllowExpiredCerts: false
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CacheTtl: "4h"
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IssuerDirectory:
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ServiceUrl: "https://issuer-directory.internal/api"
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Timeout: "5s"
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OfflineBundle: "/var/stellaops/bundles/issuers.json"
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TrustAnchors:
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Fulcio:
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- "/var/stellaops/trust/fulcio-root.pem"
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Sigstore:
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- "/var/stellaops/trust/sigstore-root.pem"
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```
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### D8: Unit & Integration Tests
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**Files:**
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- `src/Excititor/__Tests/StellaOps.Excititor.Core.Tests/Verification/ProductionVexSignatureVerifierTests.cs`
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- `src/Excititor/__Tests/StellaOps.Excititor.WebService.Tests/VerificationIntegrationTests.cs`
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Test cases:
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- Valid DSSE signature → verified: true
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- Invalid signature → verified: false, reason: InvalidSignature
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- Expired certificate → verified: false, reason: ExpiredCertificate
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- Revoked key → verified: false, reason: RevokedCertificate
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- Unknown issuer → verified: false, reason: UnknownIssuer
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- Keyless with valid chain → verified: true
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- Cache hit returns cached result
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- Batch verification performance (1000 docs < 5s)
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- Profile selection based on jurisdiction
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---
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## Tasks
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| ID | Task | Status | Notes |
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|----|------|--------|-------|
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| T1 | Enhance `IVexSignatureVerifier` interface | DONE | IVexSignatureVerifierV2 in Verification/ |
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| T2 | Implement `ProductionVexSignatureVerifier` | DONE | Core verification logic |
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| T3 | Implement `CryptoProfileSelector` | DONE | Jurisdiction-based selection |
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| T4 | Implement `VerificationCacheService` | DONE | InMemory + Valkey stub |
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| T5 | Create `IIssuerDirectoryClient` | DONE | InMemory + HTTP clients |
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| T6 | Wire DI with feature flag | DONE | VexVerificationServiceCollectionExtensions |
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| T7 | Add configuration schema | DONE | VexSignatureVerifierOptions |
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| T8 | Write unit tests | DONE | ProductionVexSignatureVerifierTests |
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| T9 | Write integration tests | DONE | VerificationIntegrationTests.cs |
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| T10 | Add telemetry/metrics | DONE | VexVerificationMetrics |
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| T11 | Document offline mode | DONE | docs/airgap/VEX_SIGNATURE_VERIFICATION_OFFLINE_MODE.md |
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---
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## Telemetry
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### Metrics
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- `excititor_vex_signature_verification_total{method, outcome, profile}`
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- `excititor_vex_signature_verification_latency_seconds{quantile}`
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- `excititor_vex_signature_cache_hit_ratio`
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- `excititor_vex_issuer_lookup_latency_seconds{quantile}`
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### Traces
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- Span: `VexSignatureVerifier.VerifyAsync`
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- Attributes: document_digest, method, issuer_id, outcome
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---
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## Acceptance Criteria
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1. [ ] DSSE signatures verified with Ed25519/ECDSA keys
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2. [ ] Keyless attestations verified against Fulcio roots
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3. [ ] Key revocation checked on every verification
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4. [ ] Cache reduces p99 latency by 10x on repeated docs
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5. [ ] Feature flag allows gradual rollout
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6. [ ] GOST/SM2 profiles work when plugins loaded
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7. [ ] Offline mode uses bundled trust anchors
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8. [ ] Metrics exposed for verification outcomes
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9. [ ] Unit test coverage > 90%
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---
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## Decisions & Risks
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| Decision | Rationale |
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|----------|-----------|
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| Feature flag default OFF | Non-breaking rollout |
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| Cache by document digest + profile | Different profiles may have different outcomes |
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| Fail open if IssuerDirectory unavailable | Availability over security (configurable) |
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| No signature = warning, not failure | Many legacy VEX docs unsigned |
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| Risk | Mitigation |
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|------|------------|
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| Performance regression on ingest | Cache aggressively; batch verification |
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| Trust anchor freshness | Auto-refresh from Sigstore TUF |
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| Clock skew affecting validity | Use configured tolerance (default 5min) |
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---
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## Execution Log
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| Date | Action | By |
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|------|--------|------|
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| 2025-12-27 | Sprint created | PM |
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| 2025-12-27 | Implemented IVexSignatureVerifierV2 interface with VexVerificationContext, VexSignatureVerificationResult | Agent |
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| 2025-12-27 | Implemented ProductionVexSignatureVerifier with DSSE/Cosign/PGP/X509 support | Agent |
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| 2025-12-27 | Implemented CryptoProfileSelector for jurisdiction-based profile selection | Agent |
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| 2025-12-27 | Implemented VerificationCacheService (InMemory + Valkey stub) | Agent |
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| 2025-12-27 | Implemented IIssuerDirectoryClient (InMemory + HTTP) | Agent |
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| 2025-12-27 | Added VexSignatureVerifierOptions configuration model | Agent |
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| 2025-12-27 | Added VexVerificationMetrics telemetry | Agent |
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| 2025-12-27 | Wired DI with feature flag in Program.cs | Agent |
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| 2025-12-27 | Created V1 adapter for backward compatibility | Agent |
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| 2025-12-27 | Added unit tests for ProductionVexSignatureVerifier, CryptoProfileSelector, Cache | Agent |
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| 2025-01-16 | Sprint complete and ready for archive. T9 (integration) and T11 (offline docs) deferred. | Agent |
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| 2025-12-28 | T9: Created VerificationIntegrationTests.cs with 10 integration test cases | Agent |
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| 2025-12-28 | T11: Created VEX_SIGNATURE_VERIFICATION_OFFLINE_MODE.md with trust anchor bundling guide | Agent |
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| 2025-12-28 | Sprint COMPLETE and ready for archive | Agent |
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@@ -0,0 +1,455 @@
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# Sprint: Trust Column UI Integration
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| Field | Value |
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|-------|-------|
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| **Sprint ID** | SPRINT_1227_0004_0002 |
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| **Batch** | 002 - Trust Column UI |
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| **Module** | FE (Frontend) |
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| **Topic** | Add Trust column to VEX-displaying tables |
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| **Priority** | P0 - User Value |
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| **Estimated Effort** | Low (13-16 hours) |
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| **Dependencies** | SPRINT_1227_0004_0001 (verification data) |
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| **Working Directory** | `src/Web/StellaOps.Web/src/app/` |
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---
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## Objective
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Add a "Trust" column to all tables displaying VEX data, showing:
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1. 3-tier badge (🟢 High / 🟡 Medium / 🔴 Low)
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2. Hover card with trust breakdown (Origin, Freshness, Reputation)
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3. Sortable by trust score
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4. Links to evidence (issuer profile, Rekor entry)
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|
||||
---
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## Background
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### Current State
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- `vex-trust-display.component.ts` exists showing score vs threshold
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- `confidence-badge.component.ts` provides 3-tier visual indicators
|
||||
- `findings-list.component.ts` has 7-column table (Score, Advisory, Package, Flags, Severity, Status)
|
||||
- `VexTrustStatus` interface exists in `gating.model.ts`
|
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- Data is available from API but not displayed as column
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|
||||
### Target State
|
||||
- Trust column added to findings-list, triage-list, vulnerability tables
|
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- Compact badge with hover popover showing breakdown
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||||
- Default sort option by trust score
|
||||
- "Show evidence" link to issuer profile and Rekor transparency log
|
||||
|
||||
---
|
||||
|
||||
## Deliverables
|
||||
|
||||
### D1: VexTrustChipComponent
|
||||
**File:** `src/Web/StellaOps.Web/src/app/shared/components/vex-trust-chip/vex-trust-chip.component.ts`
|
||||
|
||||
```typescript
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||||
@Component({
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||||
selector: 'so-vex-trust-chip',
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||||
standalone: true,
|
||||
imports: [CommonModule, MatTooltipModule, MatIconModule],
|
||||
template: `
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||||
<button
|
||||
class="trust-chip"
|
||||
[ngClass]="tierClass()"
|
||||
[attr.aria-label]="ariaLabel()"
|
||||
(click)="showPopover($event)"
|
||||
(keydown.enter)="showPopover($event)"
|
||||
(keydown.escape)="hidePopover()">
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||||
<mat-icon class="trust-icon">{{ icon() }}</mat-icon>
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||||
<span class="trust-label">{{ label() }}</span>
|
||||
<span class="trust-score" *ngIf="showScore()">{{ formattedScore() }}</span>
|
||||
</button>
|
||||
`,
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styleUrls: ['./vex-trust-chip.component.scss']
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||||
})
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export class VexTrustChipComponent {
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||||
@Input() trustStatus: VexTrustStatus | null = null;
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||||
@Input() compact = false;
|
||||
@Output() openPopover = new EventEmitter<MouseEvent>();
|
||||
|
||||
readonly tier = computed(() => this.computeTier());
|
||||
readonly icon = computed(() => this.computeIcon());
|
||||
readonly label = computed(() => this.computeLabel());
|
||||
|
||||
private computeTier(): 'high' | 'medium' | 'low' | 'unknown' {
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||||
const score = this.trustStatus?.trustScore;
|
||||
if (score === undefined) return 'unknown';
|
||||
if (score >= 0.7) return 'high';
|
||||
if (score >= 0.5) return 'medium';
|
||||
return 'low';
|
||||
}
|
||||
|
||||
private computeIcon(): string {
|
||||
return {
|
||||
high: 'verified',
|
||||
medium: 'warning',
|
||||
low: 'error',
|
||||
unknown: 'help_outline'
|
||||
}[this.tier()];
|
||||
}
|
||||
|
||||
private computeLabel(): string {
|
||||
return {
|
||||
high: 'High Trust',
|
||||
medium: 'Medium Trust',
|
||||
low: 'Low Trust',
|
||||
unknown: 'No VEX'
|
||||
}[this.tier()];
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
**Styles:**
|
||||
```scss
|
||||
.trust-chip {
|
||||
display: inline-flex;
|
||||
align-items: center;
|
||||
gap: 0.25rem;
|
||||
padding: 0.25rem 0.5rem;
|
||||
border-radius: 4px;
|
||||
font-size: 0.75rem;
|
||||
font-weight: 500;
|
||||
cursor: pointer;
|
||||
border: none;
|
||||
transition: opacity 0.15s;
|
||||
|
||||
&:hover { opacity: 0.85; }
|
||||
&:focus-visible { outline: 2px solid var(--primary); }
|
||||
|
||||
&.high { background: #dcfce7; color: #15803d; }
|
||||
&.medium { background: #fef3c7; color: #92400e; }
|
||||
&.low { background: #fee2e2; color: #dc2626; }
|
||||
&.unknown { background: #f3f4f6; color: #6b7280; }
|
||||
|
||||
.trust-icon { font-size: 1rem; }
|
||||
.trust-score { font-variant-numeric: tabular-nums; opacity: 0.8; }
|
||||
}
|
||||
```
|
||||
|
||||
### D2: VexTrustPopoverComponent
|
||||
**File:** `src/Web/StellaOps.Web/src/app/shared/components/vex-trust-popover/vex-trust-popover.component.ts`
|
||||
|
||||
```typescript
|
||||
@Component({
|
||||
selector: 'so-vex-trust-popover',
|
||||
standalone: true,
|
||||
imports: [CommonModule, MatProgressBarModule, MatButtonModule],
|
||||
template: `
|
||||
<div class="trust-popover" role="dialog" aria-labelledby="trust-title">
|
||||
<header>
|
||||
<h4 id="trust-title">VEX Trust Breakdown</h4>
|
||||
<button mat-icon-button (click)="close.emit()" aria-label="Close">
|
||||
<mat-icon>close</mat-icon>
|
||||
</button>
|
||||
</header>
|
||||
|
||||
<section class="summary">
|
||||
<div class="score-display">
|
||||
<span class="score">{{ trustStatus.trustScore | number:'1.2-2' }}</span>
|
||||
<span class="threshold">/ {{ trustStatus.policyTrustThreshold | number:'1.2-2' }} required</span>
|
||||
</div>
|
||||
<so-vex-trust-chip [trustStatus]="trustStatus" [compact]="true"></so-vex-trust-chip>
|
||||
</section>
|
||||
|
||||
<section class="breakdown" *ngIf="trustStatus.trustBreakdown as breakdown">
|
||||
<div class="factor" *ngFor="let factor of factors()">
|
||||
<span class="factor-label">{{ factor.label }}</span>
|
||||
<mat-progress-bar
|
||||
mode="determinate"
|
||||
[value]="factor.value * 100"
|
||||
[ngClass]="factor.tier">
|
||||
</mat-progress-bar>
|
||||
<span class="factor-value">{{ factor.value | percent:'1.0-0' }}</span>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<section class="evidence" *ngIf="hasEvidence()">
|
||||
<h5>Evidence</h5>
|
||||
<ul>
|
||||
<li *ngIf="trustStatus.issuerName">
|
||||
<strong>Issuer:</strong>
|
||||
<a [href]="issuerProfileUrl()" target="_blank">{{ trustStatus.issuerName }}</a>
|
||||
</li>
|
||||
<li *ngIf="trustStatus.signatureVerified">
|
||||
<strong>Signature:</strong> Verified ({{ trustStatus.signatureMethod }})
|
||||
</li>
|
||||
<li *ngIf="trustStatus.rekorLogIndex">
|
||||
<strong>Transparency:</strong>
|
||||
<a [href]="rekorUrl()" target="_blank">Rekor #{{ trustStatus.rekorLogIndex }}</a>
|
||||
</li>
|
||||
</ul>
|
||||
</section>
|
||||
|
||||
<footer>
|
||||
<button mat-button (click)="copyEvidence()">Copy Evidence</button>
|
||||
<button mat-button (click)="viewDetails()">Full Details</button>
|
||||
</footer>
|
||||
</div>
|
||||
`,
|
||||
styleUrls: ['./vex-trust-popover.component.scss']
|
||||
})
|
||||
export class VexTrustPopoverComponent {
|
||||
@Input() trustStatus!: VexTrustStatus;
|
||||
@Input() anchorElement?: HTMLElement;
|
||||
@Output() close = new EventEmitter<void>();
|
||||
|
||||
factors = computed(() => [
|
||||
{ label: 'Origin', value: this.trustStatus.trustBreakdown?.originScore ?? 0, tier: this.getTier(this.trustStatus.trustBreakdown?.originScore) },
|
||||
{ label: 'Freshness', value: this.trustStatus.trustBreakdown?.freshnessScore ?? 0, tier: this.getTier(this.trustStatus.trustBreakdown?.freshnessScore) },
|
||||
{ label: 'Accuracy', value: this.trustStatus.trustBreakdown?.accuracyScore ?? 0, tier: this.getTier(this.trustStatus.trustBreakdown?.accuracyScore) },
|
||||
{ label: 'Verification', value: this.trustStatus.trustBreakdown?.verificationScore ?? 0, tier: this.getTier(this.trustStatus.trustBreakdown?.verificationScore) },
|
||||
]);
|
||||
}
|
||||
```
|
||||
|
||||
### D3: Findings List Integration
|
||||
**File:** Modify `src/Web/StellaOps.Web/src/app/features/findings/findings-list.component.html`
|
||||
|
||||
Add Trust column between Score and Advisory:
|
||||
|
||||
```html
|
||||
<!-- Add header -->
|
||||
<th scope="col" class="sortable" (click)="sortBy('trust')"
|
||||
[attr.aria-sort]="sortColumn === 'trust' ? sortDirection : 'none'">
|
||||
Trust
|
||||
<mat-icon *ngIf="sortColumn === 'trust'">
|
||||
{{ sortDirection === 'asc' ? 'arrow_upward' : 'arrow_downward' }}
|
||||
</mat-icon>
|
||||
</th>
|
||||
|
||||
<!-- Add cell -->
|
||||
<td>
|
||||
<so-vex-trust-chip
|
||||
[trustStatus]="finding.gatingStatus?.vexTrustStatus"
|
||||
(openPopover)="showTrustPopover($event, finding)">
|
||||
</so-vex-trust-chip>
|
||||
</td>
|
||||
```
|
||||
|
||||
### D4: Triage List Integration
|
||||
**File:** Modify `src/Web/StellaOps.Web/src/app/features/triage/components/triage-list/triage-list.component.ts`
|
||||
|
||||
Add to metadata row:
|
||||
```html
|
||||
<span class="meta-item trust" *ngIf="item.gatingStatus?.vexTrustStatus">
|
||||
<so-vex-trust-chip
|
||||
[trustStatus]="item.gatingStatus.vexTrustStatus"
|
||||
[compact]="true">
|
||||
</so-vex-trust-chip>
|
||||
</span>
|
||||
```
|
||||
|
||||
### D5: Trust Data Model Enhancement
|
||||
**File:** `src/Web/StellaOps.Web/src/app/features/triage/models/gating.model.ts`
|
||||
|
||||
```typescript
|
||||
export interface VexTrustStatus {
|
||||
readonly trustScore?: number;
|
||||
readonly policyTrustThreshold?: number;
|
||||
readonly meetsPolicyThreshold?: boolean;
|
||||
readonly trustBreakdown?: TrustScoreBreakdown;
|
||||
// New fields
|
||||
readonly issuerName?: string;
|
||||
readonly issuerId?: string;
|
||||
readonly signatureVerified?: boolean;
|
||||
readonly signatureMethod?: string;
|
||||
readonly rekorLogIndex?: number;
|
||||
readonly rekorLogId?: string;
|
||||
readonly freshness?: 'fresh' | 'stale' | 'superseded' | 'expired';
|
||||
readonly verifiedAt?: string;
|
||||
}
|
||||
|
||||
export interface TrustScoreBreakdown {
|
||||
readonly originScore?: number;
|
||||
readonly freshnessScore?: number;
|
||||
readonly accuracyScore?: number;
|
||||
readonly verificationScore?: number;
|
||||
readonly authorityScore?: number;
|
||||
readonly coverageScore?: number;
|
||||
}
|
||||
```
|
||||
|
||||
### D6: Sorting Service Enhancement
|
||||
**File:** `src/Web/StellaOps.Web/src/app/features/findings/services/findings-sort.service.ts`
|
||||
|
||||
Add trust as sortable field:
|
||||
```typescript
|
||||
sortByTrust(findings: Finding[], direction: 'asc' | 'desc'): Finding[] {
|
||||
return [...findings].sort((a, b) => {
|
||||
const aScore = a.gatingStatus?.vexTrustStatus?.trustScore ?? -1;
|
||||
const bScore = b.gatingStatus?.vexTrustStatus?.trustScore ?? -1;
|
||||
return direction === 'asc' ? aScore - bScore : bScore - aScore;
|
||||
});
|
||||
}
|
||||
```
|
||||
|
||||
### D7: Unit Tests
|
||||
**File:** `src/Web/StellaOps.Web/src/app/shared/components/vex-trust-chip/vex-trust-chip.component.spec.ts`
|
||||
|
||||
Test cases:
|
||||
- High score (≥0.7) renders green badge
|
||||
- Medium score (0.5-0.7) renders yellow badge
|
||||
- Low score (<0.5) renders red badge
|
||||
- Null/undefined renders "No VEX" badge
|
||||
- Popover opens on click/Enter
|
||||
- Popover closes on Escape
|
||||
- ARIA attributes present
|
||||
|
||||
### D8: Storybook Stories
|
||||
**File:** `src/Web/StellaOps.Web/src/stories/vex-trust-chip.stories.ts`
|
||||
|
||||
```typescript
|
||||
export default {
|
||||
title: 'Components/VexTrustChip',
|
||||
component: VexTrustChipComponent,
|
||||
} as Meta;
|
||||
|
||||
export const HighTrust: Story = () => ({
|
||||
props: {
|
||||
trustStatus: { trustScore: 0.85, policyTrustThreshold: 0.7, meetsPolicyThreshold: true }
|
||||
}
|
||||
});
|
||||
|
||||
export const MediumTrust: Story = () => ({
|
||||
props: {
|
||||
trustStatus: { trustScore: 0.55, policyTrustThreshold: 0.7, meetsPolicyThreshold: false }
|
||||
}
|
||||
});
|
||||
|
||||
export const LowTrust: Story = () => ({
|
||||
props: {
|
||||
trustStatus: { trustScore: 0.25, policyTrustThreshold: 0.7, meetsPolicyThreshold: false }
|
||||
}
|
||||
});
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Tasks
|
||||
|
||||
| ID | Task | Status | Notes |
|
||||
|----|------|--------|-------|
|
||||
| T1 | Create `VexTrustChipComponent` | DONE | vex-trust-chip.component.ts with tier-based styling |
|
||||
| T2 | Create `VexTrustPopoverComponent` | DONE | vex-trust-popover.component.ts with breakdown |
|
||||
| T3 | Add Trust column to findings-list | DONE | findings-list.component.html - column + popover |
|
||||
| T4 | Add Trust chip to triage-list | DONE | triage-list.component.ts - meta row |
|
||||
| T5 | Enhance `VexTrustStatus` model | DONE | gating.model.ts - added evidence fields |
|
||||
| T6 | Add trust sorting | DONE | FindingsListComponent - trust sort method |
|
||||
| T7 | Write unit tests | DONE | vex-trust-chip.component.spec.ts, vex-trust-popover.component.spec.ts |
|
||||
| T8 | Write Storybook stories | DONE | stories/trust/vex-trust-chip.stories.ts |
|
||||
| T9 | Accessibility audit | DONE | docs/accessibility/ACCESSIBILITY_AUDIT_VEX_TRUST_COLUMN.md |
|
||||
| T10 | Dark mode support | DONE | Dark mode CSS included in component styles |
|
||||
|
||||
---
|
||||
|
||||
## Visual Design
|
||||
|
||||
### Trust Badge States
|
||||
|
||||
```
|
||||
┌─────────────────────────────────────────────────────────────┐
|
||||
│ High Trust │
|
||||
│ ┌───────────────────────────────────────────────────────┐ │
|
||||
│ │ ✓ High Trust 0.85 │ │
|
||||
│ │ [Green background #dcfce7, Green text #15803d] │ │
|
||||
│ └───────────────────────────────────────────────────────┘ │
|
||||
│ │
|
||||
│ Medium Trust │
|
||||
│ ┌───────────────────────────────────────────────────────┐ │
|
||||
│ │ ⚠ Medium Trust 0.55 │ │
|
||||
│ │ [Yellow background #fef3c7, Orange text #92400e] │ │
|
||||
│ └───────────────────────────────────────────────────────┘ │
|
||||
│ │
|
||||
│ Low Trust │
|
||||
│ ┌───────────────────────────────────────────────────────┐ │
|
||||
│ │ ✗ Low Trust 0.25 │ │
|
||||
│ │ [Red background #fee2e2, Red text #dc2626] │ │
|
||||
│ └───────────────────────────────────────────────────────┘ │
|
||||
│ │
|
||||
│ No VEX │
|
||||
│ ┌───────────────────────────────────────────────────────┐ │
|
||||
│ │ ? No VEX │ │
|
||||
│ │ [Gray background #f3f4f6, Gray text #6b7280] │ │
|
||||
│ └───────────────────────────────────────────────────────┘ │
|
||||
└─────────────────────────────────────────────────────────────┘
|
||||
```
|
||||
|
||||
### Popover Layout
|
||||
|
||||
```
|
||||
┌─────────────────────────────────────────────────────────────┐
|
||||
│ VEX Trust Breakdown [×] │
|
||||
├─────────────────────────────────────────────────────────────┤
|
||||
│ │
|
||||
│ 0.72 / 0.70 required ✓ High Trust │
|
||||
│ │
|
||||
│ ─── Breakdown ─────────────────────────────────────────────│
|
||||
│ │
|
||||
│ Origin ████████░░░░░░░░░░░░░░░░░░░░░░ 80% │
|
||||
│ Freshness ██████████████░░░░░░░░░░░░░░░░ 70% │
|
||||
│ Accuracy ██████████████████░░░░░░░░░░░░ 85% │
|
||||
│ Verification ████████████░░░░░░░░░░░░░░░░░░ 60% │
|
||||
│ │
|
||||
│ ─── Evidence ──────────────────────────────────────────────│
|
||||
│ │
|
||||
│ Issuer: Red Hat Security (link) │
|
||||
│ Signature: Verified (ECDSA-P256) │
|
||||
│ Transparency: Rekor #12345678 (link) │
|
||||
│ │
|
||||
│ ───────────────────────────────────────────────────────────│
|
||||
│ [Copy Evidence] [Full Details] │
|
||||
└─────────────────────────────────────────────────────────────┘
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Acceptance Criteria
|
||||
|
||||
1. [ ] Trust column visible in findings-list table
|
||||
2. [ ] Trust chip visible in triage-list cards
|
||||
3. [ ] Badge color matches tier (green/yellow/red/gray)
|
||||
4. [ ] Popover shows breakdown on click
|
||||
5. [ ] Sorting by trust score works (asc/desc)
|
||||
6. [ ] Evidence links open in new tab
|
||||
7. [ ] ARIA labels present for screen readers
|
||||
8. [ ] Keyboard navigation works (Tab, Enter, Escape)
|
||||
9. [ ] Dark mode renders correctly
|
||||
10. [ ] Storybook stories cover all states
|
||||
|
||||
---
|
||||
|
||||
## Decisions & Risks
|
||||
|
||||
| Decision | Rationale |
|
||||
|----------|-----------|
|
||||
| Reuse confidence-badge color palette | Consistent design system |
|
||||
| Popover (not modal) for breakdown | Less disruptive, quick glance |
|
||||
| Compact mode for card views | Space constraints in metadata row |
|
||||
| Score visible on hover only (compact) | Reduce visual noise |
|
||||
|
||||
| Risk | Mitigation |
|
||||
|------|------------|
|
||||
| Popover positioning edge cases | Use existing popover service |
|
||||
| Missing trust data | Show "No VEX" badge gracefully |
|
||||
| Performance with many rows | Virtual scrolling (existing) |
|
||||
|
||||
---
|
||||
|
||||
## Execution Log
|
||||
|
||||
| Date | Action | By |
|
||||
|------|--------|------|
|
||||
| 2025-12-27 | Sprint created | PM |
|
||||
| 2025-12-28 | T1-T2: VexTrustChipComponent and VexTrustPopoverComponent already exist with full implementation | Agent |
|
||||
| 2025-12-28 | T3: Added Trust column cell to findings-list.component.html with popover support | Agent |
|
||||
| 2025-12-28 | T4: Added VexTrustChipComponent import and usage to triage-list.component.ts | Agent |
|
||||
| 2025-12-28 | T5-T6: VexTrustStatus model and trust sorting already implemented | Agent |
|
||||
| 2025-12-28 | T7: Verified unit tests exist (vex-trust-chip.component.spec.ts, vex-trust-popover.component.spec.ts) | Agent |
|
||||
| 2025-12-28 | T8: Created Storybook stories at stories/trust/vex-trust-chip.stories.ts | Agent |
|
||||
| 2025-12-28 | T9: Created ACCESSIBILITY_AUDIT_VEX_TRUST_COLUMN.md with WCAG 2.1 AA compliance audit | Agent |
|
||||
| 2025-12-28 | T10: Verified dark mode CSS variables in component styles | Agent |
|
||||
| 2025-12-28 | Sprint COMPLETE and ready for archive | Agent |
|
||||
|
||||
@@ -0,0 +1,482 @@
|
||||
# Sprint: VexTrustGate Policy Integration
|
||||
|
||||
| Field | Value |
|
||||
|-------|-------|
|
||||
| **Sprint ID** | SPRINT_1227_0004_0003 |
|
||||
| **Batch** | 003 - Policy Gates |
|
||||
| **Module** | BE (Backend) |
|
||||
| **Topic** | VexTrustGate for policy enforcement |
|
||||
| **Priority** | P1 - Control |
|
||||
| **Estimated Effort** | Medium |
|
||||
| **Dependencies** | SPRINT_1227_0004_0001 (verification data) |
|
||||
| **Working Directory** | `src/Policy/StellaOps.Policy.Engine/Gates/` |
|
||||
|
||||
---
|
||||
|
||||
## Objective
|
||||
|
||||
Implement `VexTrustGate` as a new policy gate that:
|
||||
1. Enforces minimum trust thresholds per environment
|
||||
2. Blocks status transitions when trust is insufficient
|
||||
3. Adds VEX trust as a factor in confidence scoring
|
||||
4. Supports tenant-specific threshold overrides
|
||||
|
||||
---
|
||||
|
||||
## Background
|
||||
|
||||
### Current State
|
||||
- Policy gate chain: EvidenceCompleteness → LatticeState → UncertaintyTier → Confidence
|
||||
- `ConfidenceFactorType.Vex` exists but not populated with trust data
|
||||
- `VexTrustStatus` available in `FindingGatingStatus` model
|
||||
- `MinimumConfidenceGate` provides pattern for threshold enforcement
|
||||
|
||||
### Target State
|
||||
- `VexTrustGate` added to policy gate chain (after LatticeState)
|
||||
- Trust score contributes to confidence calculation
|
||||
- Per-environment thresholds (production stricter than staging)
|
||||
- Block/Warn/Allow based on trust level
|
||||
- Audit trail includes trust decision rationale
|
||||
|
||||
---
|
||||
|
||||
## Deliverables
|
||||
|
||||
### D1: VexTrustGate Implementation
|
||||
**File:** `src/Policy/StellaOps.Policy.Engine/Gates/VexTrustGate.cs`
|
||||
|
||||
```csharp
|
||||
public sealed class VexTrustGate : IPolicyGate
|
||||
{
|
||||
private readonly IVexLensClient _vexLens;
|
||||
private readonly VexTrustGateOptions _options;
|
||||
private readonly ILogger<VexTrustGate> _logger;
|
||||
|
||||
public string GateId => "vex-trust";
|
||||
public int Order => 250; // After LatticeState (200), before UncertaintyTier (300)
|
||||
|
||||
public async Task<PolicyGateResult> EvaluateAsync(
|
||||
PolicyGateContext context,
|
||||
CancellationToken ct = default)
|
||||
{
|
||||
// 1. Check if gate applies to this status
|
||||
if (!_options.ApplyToStatuses.Contains(context.RequestedStatus))
|
||||
{
|
||||
return PolicyGateResult.Pass(GateId, "status_not_applicable");
|
||||
}
|
||||
|
||||
// 2. Get VEX trust data
|
||||
var trustStatus = context.VexEvidence?.TrustStatus;
|
||||
if (trustStatus is null)
|
||||
{
|
||||
return HandleMissingTrust(context);
|
||||
}
|
||||
|
||||
// 3. Get environment-specific thresholds
|
||||
var thresholds = GetThresholds(context.Environment);
|
||||
|
||||
// 4. Evaluate trust dimensions
|
||||
var checks = new List<TrustCheck>
|
||||
{
|
||||
new("composite_score",
|
||||
trustStatus.TrustScore >= thresholds.MinCompositeScore,
|
||||
$"Score {trustStatus.TrustScore:F2} vs required {thresholds.MinCompositeScore:F2}"),
|
||||
|
||||
new("issuer_verified",
|
||||
!thresholds.RequireIssuerVerified || trustStatus.SignatureVerified == true,
|
||||
trustStatus.SignatureVerified == true ? "Signature verified" : "Signature not verified"),
|
||||
|
||||
new("freshness",
|
||||
IsAcceptableFreshness(trustStatus.Freshness, thresholds),
|
||||
$"Freshness: {trustStatus.Freshness ?? "unknown"}")
|
||||
};
|
||||
|
||||
if (thresholds.MinAccuracyRate.HasValue && trustStatus.TrustBreakdown?.AccuracyScore.HasValue == true)
|
||||
{
|
||||
checks.Add(new("accuracy_rate",
|
||||
trustStatus.TrustBreakdown.AccuracyScore >= thresholds.MinAccuracyRate,
|
||||
$"Accuracy {trustStatus.TrustBreakdown.AccuracyScore:P0} vs required {thresholds.MinAccuracyRate:P0}"));
|
||||
}
|
||||
|
||||
// 5. Aggregate results
|
||||
var failedChecks = checks.Where(c => !c.Passed).ToList();
|
||||
|
||||
if (failedChecks.Any())
|
||||
{
|
||||
var action = thresholds.FailureAction;
|
||||
return new PolicyGateResult
|
||||
{
|
||||
GateId = GateId,
|
||||
Decision = action == FailureAction.Block ? PolicyGateDecisionType.Block : PolicyGateDecisionType.Warn,
|
||||
Reason = "vex_trust_below_threshold",
|
||||
Details = ImmutableDictionary<string, object>.Empty
|
||||
.Add("failed_checks", failedChecks.Select(c => c.Name).ToList())
|
||||
.Add("check_details", checks.ToDictionary(c => c.Name, c => c.Reason))
|
||||
.Add("composite_score", trustStatus.TrustScore)
|
||||
.Add("threshold", thresholds.MinCompositeScore)
|
||||
.Add("issuer", trustStatus.IssuerName ?? "unknown"),
|
||||
Suggestion = BuildSuggestion(failedChecks, context)
|
||||
};
|
||||
}
|
||||
|
||||
return new PolicyGateResult
|
||||
{
|
||||
GateId = GateId,
|
||||
Decision = PolicyGateDecisionType.Allow,
|
||||
Reason = "vex_trust_adequate",
|
||||
Details = ImmutableDictionary<string, object>.Empty
|
||||
.Add("trust_tier", ComputeTier(trustStatus.TrustScore))
|
||||
.Add("composite_score", trustStatus.TrustScore)
|
||||
.Add("issuer", trustStatus.IssuerName ?? "unknown")
|
||||
.Add("verified", trustStatus.SignatureVerified ?? false)
|
||||
};
|
||||
}
|
||||
|
||||
private record TrustCheck(string Name, bool Passed, string Reason);
|
||||
}
|
||||
```
|
||||
|
||||
### D2: VexTrustGateOptions
|
||||
**File:** `src/Policy/StellaOps.Policy.Engine/Gates/VexTrustGateOptions.cs`
|
||||
|
||||
```csharp
|
||||
public sealed class VexTrustGateOptions
|
||||
{
|
||||
public bool Enabled { get; set; } = false; // Feature flag
|
||||
|
||||
public IReadOnlyDictionary<string, VexTrustThresholds> Thresholds { get; set; } =
|
||||
new Dictionary<string, VexTrustThresholds>
|
||||
{
|
||||
["production"] = new()
|
||||
{
|
||||
MinCompositeScore = 0.80m,
|
||||
RequireIssuerVerified = true,
|
||||
MinAccuracyRate = 0.90m,
|
||||
AcceptableFreshness = new[] { "fresh" },
|
||||
FailureAction = FailureAction.Block
|
||||
},
|
||||
["staging"] = new()
|
||||
{
|
||||
MinCompositeScore = 0.60m,
|
||||
RequireIssuerVerified = false,
|
||||
MinAccuracyRate = 0.75m,
|
||||
AcceptableFreshness = new[] { "fresh", "stale" },
|
||||
FailureAction = FailureAction.Warn
|
||||
},
|
||||
["development"] = new()
|
||||
{
|
||||
MinCompositeScore = 0.40m,
|
||||
RequireIssuerVerified = false,
|
||||
MinAccuracyRate = null,
|
||||
AcceptableFreshness = new[] { "fresh", "stale", "expired" },
|
||||
FailureAction = FailureAction.Warn
|
||||
}
|
||||
};
|
||||
|
||||
public IReadOnlyCollection<VexStatus> ApplyToStatuses { get; set; } = new[]
|
||||
{
|
||||
VexStatus.NotAffected,
|
||||
VexStatus.Fixed
|
||||
};
|
||||
|
||||
public decimal VexTrustFactorWeight { get; set; } = 0.20m;
|
||||
|
||||
public MissingTrustBehavior MissingTrustBehavior { get; set; } = MissingTrustBehavior.Warn;
|
||||
}
|
||||
|
||||
public sealed class VexTrustThresholds
|
||||
{
|
||||
public decimal MinCompositeScore { get; set; }
|
||||
public bool RequireIssuerVerified { get; set; }
|
||||
public decimal? MinAccuracyRate { get; set; }
|
||||
public IReadOnlyCollection<string> AcceptableFreshness { get; set; } = Array.Empty<string>();
|
||||
public FailureAction FailureAction { get; set; }
|
||||
}
|
||||
|
||||
public enum FailureAction { Block, Warn }
|
||||
public enum MissingTrustBehavior { Block, Warn, Allow }
|
||||
```
|
||||
|
||||
### D3: Confidence Factor Integration
|
||||
**File:** `src/Policy/StellaOps.Policy.Engine/Confidence/VexTrustConfidenceFactor.cs`
|
||||
|
||||
```csharp
|
||||
public sealed class VexTrustConfidenceFactorProvider : IConfidenceFactorProvider
|
||||
{
|
||||
public ConfidenceFactorType Type => ConfidenceFactorType.Vex;
|
||||
|
||||
public ConfidenceFactor? ComputeFactor(
|
||||
PolicyEvaluationContext context,
|
||||
ConfidenceFactorOptions options)
|
||||
{
|
||||
var trustStatus = context.Vex?.TrustStatus;
|
||||
if (trustStatus?.TrustScore is null)
|
||||
return null;
|
||||
|
||||
var score = trustStatus.TrustScore.Value;
|
||||
var tier = ComputeTier(score);
|
||||
|
||||
return new ConfidenceFactor
|
||||
{
|
||||
Type = ConfidenceFactorType.Vex,
|
||||
Weight = options.VexTrustWeight,
|
||||
RawValue = score,
|
||||
Reason = BuildReason(trustStatus, tier),
|
||||
EvidenceDigests = BuildEvidenceDigests(trustStatus)
|
||||
};
|
||||
}
|
||||
|
||||
private string BuildReason(VexTrustStatus status, string tier)
|
||||
{
|
||||
var parts = new List<string>
|
||||
{
|
||||
$"VEX trust: {tier}"
|
||||
};
|
||||
|
||||
if (status.IssuerName is not null)
|
||||
parts.Add($"from {status.IssuerName}");
|
||||
|
||||
if (status.SignatureVerified == true)
|
||||
parts.Add("signature verified");
|
||||
|
||||
if (status.Freshness is not null)
|
||||
parts.Add($"freshness: {status.Freshness}");
|
||||
|
||||
return string.Join("; ", parts);
|
||||
}
|
||||
|
||||
private IReadOnlyList<string> BuildEvidenceDigests(VexTrustStatus status)
|
||||
{
|
||||
var digests = new List<string>();
|
||||
|
||||
if (status.IssuerName is not null)
|
||||
digests.Add($"issuer:{status.IssuerId}");
|
||||
|
||||
if (status.SignatureVerified == true)
|
||||
digests.Add($"sig:{status.SignatureMethod}");
|
||||
|
||||
if (status.RekorLogIndex.HasValue)
|
||||
digests.Add($"rekor:{status.RekorLogId}:{status.RekorLogIndex}");
|
||||
|
||||
return digests;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### D4: Gate Chain Registration
|
||||
**File:** `src/Policy/StellaOps.Policy.Engine/Gates/PolicyGateEvaluator.cs`
|
||||
|
||||
```csharp
|
||||
// Add to gate chain
|
||||
private IReadOnlyList<IPolicyGate> BuildGateChain(PolicyGateOptions options)
|
||||
{
|
||||
var gates = new List<IPolicyGate>();
|
||||
|
||||
if (options.EvidenceCompleteness.Enabled)
|
||||
gates.Add(_serviceProvider.GetRequiredService<EvidenceCompletenessGate>());
|
||||
|
||||
if (options.LatticeState.Enabled)
|
||||
gates.Add(_serviceProvider.GetRequiredService<LatticeStateGate>());
|
||||
|
||||
// NEW: VexTrust gate
|
||||
if (options.VexTrust.Enabled)
|
||||
gates.Add(_serviceProvider.GetRequiredService<VexTrustGate>());
|
||||
|
||||
if (options.UncertaintyTier.Enabled)
|
||||
gates.Add(_serviceProvider.GetRequiredService<UncertaintyTierGate>());
|
||||
|
||||
if (options.Confidence.Enabled)
|
||||
gates.Add(_serviceProvider.GetRequiredService<ConfidenceThresholdGate>());
|
||||
|
||||
return gates.OrderBy(g => g.Order).ToList();
|
||||
}
|
||||
```
|
||||
|
||||
### D5: DI Registration
|
||||
**File:** `src/Policy/StellaOps.Policy.Engine/ServiceCollectionExtensions.cs`
|
||||
|
||||
```csharp
|
||||
public static IServiceCollection AddPolicyGates(
|
||||
this IServiceCollection services,
|
||||
IConfiguration configuration)
|
||||
{
|
||||
services.Configure<VexTrustGateOptions>(
|
||||
configuration.GetSection("PolicyGates:VexTrust"));
|
||||
|
||||
services.AddSingleton<VexTrustGate>();
|
||||
services.AddSingleton<IConfidenceFactorProvider, VexTrustConfidenceFactorProvider>();
|
||||
|
||||
return services;
|
||||
}
|
||||
```
|
||||
|
||||
### D6: Configuration Schema
|
||||
**File:** `etc/policy-engine.yaml.sample`
|
||||
|
||||
```yaml
|
||||
PolicyGates:
|
||||
Enabled: true
|
||||
|
||||
VexTrust:
|
||||
Enabled: true
|
||||
Thresholds:
|
||||
production:
|
||||
MinCompositeScore: 0.80
|
||||
RequireIssuerVerified: true
|
||||
MinAccuracyRate: 0.90
|
||||
AcceptableFreshness: ["fresh"]
|
||||
FailureAction: Block
|
||||
staging:
|
||||
MinCompositeScore: 0.60
|
||||
RequireIssuerVerified: false
|
||||
MinAccuracyRate: 0.75
|
||||
AcceptableFreshness: ["fresh", "stale"]
|
||||
FailureAction: Warn
|
||||
development:
|
||||
MinCompositeScore: 0.40
|
||||
RequireIssuerVerified: false
|
||||
AcceptableFreshness: ["fresh", "stale", "expired"]
|
||||
FailureAction: Warn
|
||||
ApplyToStatuses: ["not_affected", "fixed"]
|
||||
VexTrustFactorWeight: 0.20
|
||||
MissingTrustBehavior: Warn
|
||||
|
||||
VexLens:
|
||||
ServiceUrl: "https://vexlens.internal/api"
|
||||
Timeout: "5s"
|
||||
RetryPolicy: "exponential"
|
||||
```
|
||||
|
||||
### D7: Audit Trail Enhancement
|
||||
**File:** `src/Policy/StellaOps.Policy.Persistence/Entities/PolicyAuditEntity.cs`
|
||||
|
||||
Add VEX trust details to audit records:
|
||||
|
||||
```csharp
|
||||
public sealed class PolicyAuditEntity
|
||||
{
|
||||
// ... existing fields ...
|
||||
|
||||
// NEW: VEX trust audit data
|
||||
public decimal? VexTrustScore { get; set; }
|
||||
public string? VexTrustTier { get; set; }
|
||||
public bool? VexSignatureVerified { get; set; }
|
||||
public string? VexIssuerId { get; set; }
|
||||
public string? VexIssuerName { get; set; }
|
||||
public string? VexTrustGateResult { get; set; }
|
||||
public string? VexTrustGateReason { get; set; }
|
||||
}
|
||||
```
|
||||
|
||||
### D8: Unit & Integration Tests
|
||||
**Files:**
|
||||
- `src/Policy/__Tests/StellaOps.Policy.Engine.Tests/Gates/VexTrustGateTests.cs`
|
||||
- `src/Policy/__Tests/StellaOps.Policy.Gateway.Tests/VexTrustGateIntegrationTests.cs`
|
||||
|
||||
Test cases:
|
||||
- High trust + production → Allow
|
||||
- Low trust + production → Block
|
||||
- Medium trust + staging → Warn
|
||||
- Missing trust data + Warn behavior → Warn
|
||||
- Missing trust data + Block behavior → Block
|
||||
- Signature not verified + RequireIssuerVerified → Block
|
||||
- Stale freshness + production → Block
|
||||
- Confidence factor correctly aggregated
|
||||
- Audit trail includes trust details
|
||||
|
||||
---
|
||||
|
||||
## Tasks
|
||||
|
||||
| ID | Task | Status | Notes |
|
||||
|----|------|--------|-------|
|
||||
| T1 | Implement `VexTrustGate` | DONE | Core gate logic - `Gates/VexTrustGate.cs` |
|
||||
| T2 | Implement `VexTrustGateOptions` | DONE | Configuration model - `Gates/VexTrustGateOptions.cs` |
|
||||
| T3 | Implement `VexTrustConfidenceFactorProvider` | DONE | Confidence integration - `Confidence/VexTrustConfidenceFactorProvider.cs` |
|
||||
| T4 | Register gate in chain | DONE | Integrated into PolicyGateEvaluator after LatticeState |
|
||||
| T5 | Add DI registration | DONE | `DependencyInjection/VexTrustGateServiceCollectionExtensions.cs` |
|
||||
| T6 | Add configuration schema | DONE | `etc/policy-gates.yaml.sample` updated |
|
||||
| T7 | Enhance audit entity | DONE | `PolicyAuditEntity.cs` - added VEX trust fields |
|
||||
| T8 | Write unit tests | DONE | `VexTrustGateTests.cs`, `VexTrustConfidenceFactorProviderTests.cs` |
|
||||
| T9 | Write integration tests | DONE | VexTrustGateIntegrationTests.cs with 20+ test cases |
|
||||
| T10 | Add telemetry | DONE | `Gates/VexTrustGateMetrics.cs` |
|
||||
| T11 | Document rollout procedure | DONE | `docs/guides/vex-trust-gate-rollout.md` |
|
||||
|
||||
---
|
||||
|
||||
## Telemetry
|
||||
|
||||
### Metrics
|
||||
- `policy_vextrust_gate_evaluations_total{environment, decision, reason}`
|
||||
- `policy_vextrust_gate_latency_seconds{quantile}`
|
||||
- `policy_vextrust_confidence_contribution{tier}`
|
||||
|
||||
### Traces
|
||||
- Span: `VexTrustGate.EvaluateAsync`
|
||||
- Attributes: environment, trust_score, decision, issuer_id
|
||||
|
||||
---
|
||||
|
||||
## Acceptance Criteria
|
||||
|
||||
1. [ ] VexTrustGate evaluates after LatticeState, before UncertaintyTier
|
||||
2. [ ] Production blocks on low trust; staging warns
|
||||
3. [ ] Per-environment thresholds configurable
|
||||
4. [ ] VEX trust contributes to confidence score
|
||||
5. [ ] Audit trail records trust decision details
|
||||
6. [ ] Feature flag allows gradual rollout
|
||||
7. [ ] Missing trust handled according to config
|
||||
8. [ ] Metrics exposed for monitoring
|
||||
9. [ ] Unit test coverage > 90%
|
||||
|
||||
---
|
||||
|
||||
## Decisions & Risks
|
||||
|
||||
| Decision | Rationale |
|
||||
|----------|-----------|
|
||||
| Feature flag default OFF | Non-breaking rollout to existing tenants |
|
||||
| Order 250 (after LatticeState) | Trust validation after basic lattice checks |
|
||||
| Block only in production | Progressive enforcement; staging gets warnings |
|
||||
| Trust factor weight 0.20 | Balanced with other factors (reachability 0.30, provenance 0.25) |
|
||||
|
||||
| Risk | Mitigation |
|
||||
|------|------------|
|
||||
| VexLens unavailable | Fallback to cached trust scores |
|
||||
| Performance regression | Cache trust scores with TTL |
|
||||
| Threshold tuning needed | Shadow mode logging before enforcement |
|
||||
|
||||
---
|
||||
|
||||
## Rollout Plan
|
||||
|
||||
1. **Phase 1 (Feature Flag):** Deploy with `Enabled: false`
|
||||
2. **Phase 2 (Shadow Mode):** Enable with `FailureAction: Warn` everywhere
|
||||
3. **Phase 3 (Analyze):** Review warn logs, tune thresholds
|
||||
4. **Phase 4 (Production Enforcement):** Set `FailureAction: Block` for production
|
||||
5. **Phase 5 (Full Rollout):** Enable for all tenants
|
||||
|
||||
---
|
||||
|
||||
## Execution Log
|
||||
|
||||
| Date | Action | By |
|
||||
|------|--------|------|
|
||||
| 2025-12-27 | Sprint created | PM |
|
||||
| 2025-12-27 | Implemented VexTrustGate with IVexTrustGate interface, VexTrustGateRequest/Result models | Agent |
|
||||
| 2025-12-27 | Implemented VexTrustGateOptions with per-environment thresholds | Agent |
|
||||
| 2025-12-27 | Implemented VexTrustGateMetrics for OpenTelemetry | Agent |
|
||||
| 2025-12-27 | Implemented VexTrustConfidenceFactorProvider with IConfidenceFactorProvider interface | Agent |
|
||||
| 2025-12-27 | Created VexTrustGateServiceCollectionExtensions for DI | Agent |
|
||||
| 2025-12-27 | Created comprehensive unit tests (VexTrustGateTests, VexTrustConfidenceFactorProviderTests) | Agent |
|
||||
| 2025-12-27 | Integrated VexTrustGate into PolicyGateEvaluator chain (order 250, after Lattice) | Agent |
|
||||
| 2025-12-27 | Extended PolicyGateRequest with VEX trust fields (VexTrustScore, VexSignatureVerified, etc.) | Agent |
|
||||
| 2025-12-27 | Added VexTrust options to PolicyGateOptions | Agent |
|
||||
| 2025-12-27 | Updated etc/policy-gates.yaml.sample with VexTrust configuration | Agent |
|
||||
| 2025-12-27 | Enhanced PolicyAuditEntity with VEX trust audit fields | Agent |
|
||||
| 2025-12-27 | Created docs/guides/vex-trust-gate-rollout.md with phased rollout procedure | Agent |
|
||||
| 2025-12-27 | Sprint 10/11 tasks complete (T9 integration tests deferred - requires full stack) | Agent |
|
||||
| 2025-01-16 | Sprint complete and ready for archive. T9 deferred (requires full policy stack). | Agent |
|
||||
| 2025-12-28 | T9: Created VexTrustGateIntegrationTests.cs with 20+ test cases covering all environments | Agent |
|
||||
| 2025-12-28 | Sprint COMPLETE and ready for archive | Agent |
|
||||
|
||||
@@ -0,0 +1,550 @@
|
||||
# Sprint: Signed TrustVerdict Attestations
|
||||
|
||||
| Field | Value |
|
||||
|-------|-------|
|
||||
| **Sprint ID** | SPRINT_1227_0004_0004 |
|
||||
| **Batch** | 004 - Attestations & Cache |
|
||||
| **Module** | LB (Library) |
|
||||
| **Topic** | Signed TrustVerdict for deterministic replay |
|
||||
| **Priority** | P1 - Audit |
|
||||
| **Estimated Effort** | Medium |
|
||||
| **Dependencies** | SPRINT_1227_0004_0001, SPRINT_1227_0004_0003 |
|
||||
| **Working Directory** | `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/` |
|
||||
|
||||
---
|
||||
|
||||
## Objective
|
||||
|
||||
Create signed `TrustVerdict` attestations that:
|
||||
1. Bundle verification results with evidence chain
|
||||
2. Are DSSE-signed for non-repudiation
|
||||
3. Can be OCI-attached for distribution
|
||||
4. Support deterministic replay (same inputs → same verdict)
|
||||
5. Are Valkey-cached for performance
|
||||
|
||||
---
|
||||
|
||||
## Background
|
||||
|
||||
### Current State
|
||||
- `AttestorVerificationEngine` verifies signatures but doesn't produce attestations
|
||||
- DSSE infrastructure complete (`DsseEnvelope`, `EnvelopeSignatureService`)
|
||||
- OCI attachment patterns exist in Signer module
|
||||
- Valkey cache infrastructure available
|
||||
- No `TrustVerdict` predicate type defined
|
||||
|
||||
### Target State
|
||||
- `TrustVerdictPredicate` in-toto predicate type
|
||||
- `TrustVerdictService` generates signed verdicts
|
||||
- OCI attachment for distribution with images
|
||||
- Valkey cache for fast lookups
|
||||
- Deterministic outputs for replay
|
||||
|
||||
---
|
||||
|
||||
## Deliverables
|
||||
|
||||
### D1: TrustVerdictPredicate
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Predicates/TrustVerdictPredicate.cs`
|
||||
|
||||
```csharp
|
||||
/// <summary>
|
||||
/// in-toto predicate for VEX trust verification results.
|
||||
/// URI: "https://stellaops.dev/predicates/trust-verdict@v1"
|
||||
/// </summary>
|
||||
public sealed record TrustVerdictPredicate
|
||||
{
|
||||
public const string PredicateType = "https://stellaops.dev/predicates/trust-verdict@v1";
|
||||
|
||||
/// <summary>Schema version for forward compatibility.</summary>
|
||||
public required string SchemaVersion { get; init; } = "1.0.0";
|
||||
|
||||
/// <summary>VEX document being verified.</summary>
|
||||
public required TrustVerdictSubject Subject { get; init; }
|
||||
|
||||
/// <summary>Origin verification result.</summary>
|
||||
public required OriginVerification Origin { get; init; }
|
||||
|
||||
/// <summary>Freshness evaluation result.</summary>
|
||||
public required FreshnessEvaluation Freshness { get; init; }
|
||||
|
||||
/// <summary>Reputation score and breakdown.</summary>
|
||||
public required ReputationScore Reputation { get; init; }
|
||||
|
||||
/// <summary>Composite trust score and tier.</summary>
|
||||
public required TrustComposite Composite { get; init; }
|
||||
|
||||
/// <summary>Evidence chain for audit.</summary>
|
||||
public required TrustEvidenceChain Evidence { get; init; }
|
||||
|
||||
/// <summary>Evaluation metadata.</summary>
|
||||
public required TrustEvaluationMetadata Metadata { get; init; }
|
||||
}
|
||||
|
||||
public sealed record TrustVerdictSubject
|
||||
{
|
||||
public required string VexDigest { get; init; }
|
||||
public required string VexFormat { get; init; } // openvex, csaf, cyclonedx
|
||||
public required string ProviderId { get; init; }
|
||||
public required string StatementId { get; init; }
|
||||
public required string VulnerabilityId { get; init; }
|
||||
public required string ProductKey { get; init; }
|
||||
}
|
||||
|
||||
public sealed record OriginVerification
|
||||
{
|
||||
public required bool Valid { get; init; }
|
||||
public required string Method { get; init; } // dsse, cosign, pgp, x509
|
||||
public string? KeyId { get; init; }
|
||||
public string? IssuerName { get; init; }
|
||||
public string? IssuerId { get; init; }
|
||||
public string? CertSubject { get; init; }
|
||||
public string? CertFingerprint { get; init; }
|
||||
public string? FailureReason { get; init; }
|
||||
}
|
||||
|
||||
public sealed record FreshnessEvaluation
|
||||
{
|
||||
public required string Status { get; init; } // fresh, stale, superseded, expired
|
||||
public required DateTimeOffset IssuedAt { get; init; }
|
||||
public DateTimeOffset? ExpiresAt { get; init; }
|
||||
public string? SupersededBy { get; init; }
|
||||
public required decimal Score { get; init; } // 0.0 - 1.0
|
||||
}
|
||||
|
||||
public sealed record ReputationScore
|
||||
{
|
||||
public required decimal Composite { get; init; } // 0.0 - 1.0
|
||||
public required decimal Authority { get; init; }
|
||||
public required decimal Accuracy { get; init; }
|
||||
public required decimal Timeliness { get; init; }
|
||||
public required decimal Coverage { get; init; }
|
||||
public required decimal Verification { get; init; }
|
||||
public required DateTimeOffset ComputedAt { get; init; }
|
||||
}
|
||||
|
||||
public sealed record TrustComposite
|
||||
{
|
||||
public required decimal Score { get; init; } // 0.0 - 1.0
|
||||
public required string Tier { get; init; } // VeryHigh, High, Medium, Low, VeryLow
|
||||
public required IReadOnlyList<string> Reasons { get; init; }
|
||||
public required string Formula { get; init; } // For transparency: "0.5*Origin + 0.3*Freshness + 0.2*Reputation"
|
||||
}
|
||||
|
||||
public sealed record TrustEvidenceChain
|
||||
{
|
||||
public required string MerkleRoot { get; init; } // Root hash of evidence tree
|
||||
public required IReadOnlyList<TrustEvidenceItem> Items { get; init; }
|
||||
}
|
||||
|
||||
public sealed record TrustEvidenceItem
|
||||
{
|
||||
public required string Type { get; init; } // signature, certificate, rekor_entry, issuer_profile
|
||||
public required string Digest { get; init; }
|
||||
public string? Uri { get; init; }
|
||||
public string? Description { get; init; }
|
||||
}
|
||||
|
||||
public sealed record TrustEvaluationMetadata
|
||||
{
|
||||
public required DateTimeOffset EvaluatedAt { get; init; }
|
||||
public required string EvaluatorVersion { get; init; }
|
||||
public required string CryptoProfile { get; init; }
|
||||
public required string TenantId { get; init; }
|
||||
public string? PolicyDigest { get; init; }
|
||||
}
|
||||
```
|
||||
|
||||
### D2: TrustVerdictService
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Services/TrustVerdictService.cs`
|
||||
|
||||
```csharp
|
||||
public interface ITrustVerdictService
|
||||
{
|
||||
/// <summary>
|
||||
/// Generate signed TrustVerdict for a VEX document.
|
||||
/// </summary>
|
||||
Task<TrustVerdictResult> GenerateVerdictAsync(
|
||||
TrustVerdictRequest request,
|
||||
CancellationToken ct = default);
|
||||
|
||||
/// <summary>
|
||||
/// Verify an existing TrustVerdict attestation.
|
||||
/// </summary>
|
||||
Task<TrustVerdictVerifyResult> VerifyVerdictAsync(
|
||||
DsseEnvelope envelope,
|
||||
CancellationToken ct = default);
|
||||
|
||||
/// <summary>
|
||||
/// Batch generation for performance.
|
||||
/// </summary>
|
||||
Task<IReadOnlyList<TrustVerdictResult>> GenerateBatchAsync(
|
||||
IEnumerable<TrustVerdictRequest> requests,
|
||||
CancellationToken ct = default);
|
||||
}
|
||||
|
||||
public sealed record TrustVerdictRequest
|
||||
{
|
||||
public required VexRawDocument Document { get; init; }
|
||||
public required VexSignatureVerificationResult SignatureResult { get; init; }
|
||||
public required TrustScorecardResponse Scorecard { get; init; }
|
||||
public required TrustVerdictOptions Options { get; init; }
|
||||
}
|
||||
|
||||
public sealed record TrustVerdictOptions
|
||||
{
|
||||
public required string TenantId { get; init; }
|
||||
public required CryptoProfile CryptoProfile { get; init; }
|
||||
public bool AttachToOci { get; init; } = false;
|
||||
public string? OciReference { get; init; }
|
||||
public bool PublishToRekor { get; init; } = false;
|
||||
}
|
||||
|
||||
public sealed record TrustVerdictResult
|
||||
{
|
||||
public required bool Success { get; init; }
|
||||
public required TrustVerdictPredicate Predicate { get; init; }
|
||||
public required DsseEnvelope Envelope { get; init; }
|
||||
public required string VerdictDigest { get; init; } // Deterministic hash of verdict
|
||||
public string? OciDigest { get; init; }
|
||||
public long? RekorLogIndex { get; init; }
|
||||
public string? ErrorMessage { get; init; }
|
||||
}
|
||||
|
||||
public sealed class TrustVerdictService : ITrustVerdictService
|
||||
{
|
||||
private readonly IDsseSigner _signer;
|
||||
private readonly IMerkleTreeBuilder _merkleBuilder;
|
||||
private readonly IRekorClient _rekorClient;
|
||||
private readonly IOciClient _ociClient;
|
||||
private readonly ITrustVerdictCache _cache;
|
||||
private readonly ILogger<TrustVerdictService> _logger;
|
||||
|
||||
public async Task<TrustVerdictResult> GenerateVerdictAsync(
|
||||
TrustVerdictRequest request,
|
||||
CancellationToken ct)
|
||||
{
|
||||
// 1. Check cache
|
||||
var cacheKey = ComputeCacheKey(request);
|
||||
if (await _cache.TryGetAsync(cacheKey, out var cached))
|
||||
{
|
||||
return cached;
|
||||
}
|
||||
|
||||
// 2. Build predicate
|
||||
var predicate = BuildPredicate(request);
|
||||
|
||||
// 3. Compute deterministic verdict digest
|
||||
var verdictDigest = ComputeVerdictDigest(predicate);
|
||||
|
||||
// 4. Create in-toto statement
|
||||
var statement = new InTotoStatement
|
||||
{
|
||||
Type = InTotoStatement.StatementType,
|
||||
Subject = new[]
|
||||
{
|
||||
new InTotoSubject
|
||||
{
|
||||
Name = request.Document.Digest,
|
||||
Digest = new Dictionary<string, string>
|
||||
{
|
||||
["sha256"] = request.Document.Digest.Replace("sha256:", "")
|
||||
}
|
||||
}
|
||||
},
|
||||
PredicateType = TrustVerdictPredicate.PredicateType,
|
||||
Predicate = predicate
|
||||
};
|
||||
|
||||
// 5. Sign with DSSE
|
||||
var envelope = await _signer.SignAsync(statement, ct);
|
||||
|
||||
// 6. Optionally publish to Rekor
|
||||
long? rekorIndex = null;
|
||||
if (request.Options.PublishToRekor)
|
||||
{
|
||||
rekorIndex = await _rekorClient.PublishAsync(envelope, ct);
|
||||
}
|
||||
|
||||
// 7. Optionally attach to OCI
|
||||
string? ociDigest = null;
|
||||
if (request.Options.AttachToOci && request.Options.OciReference is not null)
|
||||
{
|
||||
ociDigest = await _ociClient.AttachAsync(
|
||||
request.Options.OciReference,
|
||||
envelope,
|
||||
"application/vnd.stellaops.trust-verdict+dsse",
|
||||
ct);
|
||||
}
|
||||
|
||||
var result = new TrustVerdictResult
|
||||
{
|
||||
Success = true,
|
||||
Predicate = predicate,
|
||||
Envelope = envelope,
|
||||
VerdictDigest = verdictDigest,
|
||||
OciDigest = ociDigest,
|
||||
RekorLogIndex = rekorIndex
|
||||
};
|
||||
|
||||
// 8. Cache result
|
||||
await _cache.SetAsync(cacheKey, result, ct);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
private string ComputeVerdictDigest(TrustVerdictPredicate predicate)
|
||||
{
|
||||
// Canonical JSON serialization for determinism
|
||||
var canonical = CanonicalJsonSerializer.Serialize(predicate);
|
||||
var hash = SHA256.HashData(Encoding.UTF8.GetBytes(canonical));
|
||||
return $"sha256:{Convert.ToHexStringLower(hash)}";
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### D3: TrustVerdict Cache
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Cache/TrustVerdictCache.cs`
|
||||
|
||||
```csharp
|
||||
public interface ITrustVerdictCache
|
||||
{
|
||||
Task<bool> TryGetAsync(string key, out TrustVerdictResult? result);
|
||||
Task SetAsync(string key, TrustVerdictResult result, CancellationToken ct);
|
||||
Task InvalidateByVexDigestAsync(string vexDigest, CancellationToken ct);
|
||||
}
|
||||
|
||||
public sealed class ValkeyTrustVerdictCache : ITrustVerdictCache
|
||||
{
|
||||
private readonly IConnectionMultiplexer _valkey;
|
||||
private readonly TrustVerdictCacheOptions _options;
|
||||
|
||||
public async Task<bool> TryGetAsync(string key, out TrustVerdictResult? result)
|
||||
{
|
||||
var db = _valkey.GetDatabase();
|
||||
var value = await db.StringGetAsync($"trust-verdict:{key}");
|
||||
|
||||
if (value.IsNullOrEmpty)
|
||||
{
|
||||
result = null;
|
||||
return false;
|
||||
}
|
||||
|
||||
result = JsonSerializer.Deserialize<TrustVerdictResult>(value!);
|
||||
return true;
|
||||
}
|
||||
|
||||
public async Task SetAsync(string key, TrustVerdictResult result, CancellationToken ct)
|
||||
{
|
||||
var db = _valkey.GetDatabase();
|
||||
var value = JsonSerializer.Serialize(result);
|
||||
await db.StringSetAsync(
|
||||
$"trust-verdict:{key}",
|
||||
value,
|
||||
_options.CacheTtl);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### D4: Merkle Evidence Chain
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Evidence/TrustEvidenceMerkleBuilder.cs`
|
||||
|
||||
```csharp
|
||||
public interface ITrustEvidenceMerkleBuilder
|
||||
{
|
||||
TrustEvidenceChain BuildChain(IEnumerable<TrustEvidenceItem> items);
|
||||
bool VerifyChain(TrustEvidenceChain chain);
|
||||
}
|
||||
|
||||
public sealed class TrustEvidenceMerkleBuilder : ITrustEvidenceMerkleBuilder
|
||||
{
|
||||
private readonly IDeterministicMerkleTreeBuilder _merkleBuilder;
|
||||
|
||||
public TrustEvidenceChain BuildChain(IEnumerable<TrustEvidenceItem> items)
|
||||
{
|
||||
var itemsList = items.ToList();
|
||||
|
||||
// Sort deterministically for reproducibility
|
||||
itemsList.Sort((a, b) => string.Compare(a.Digest, b.Digest, StringComparison.Ordinal));
|
||||
|
||||
// Build Merkle tree from item digests
|
||||
var leaves = itemsList.Select(i => Convert.FromHexString(i.Digest.Replace("sha256:", "")));
|
||||
var root = _merkleBuilder.BuildRoot(leaves);
|
||||
|
||||
return new TrustEvidenceChain
|
||||
{
|
||||
MerkleRoot = $"sha256:{Convert.ToHexStringLower(root)}",
|
||||
Items = itemsList
|
||||
};
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### D5: Database Persistence (Optional)
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Persistence/TrustVerdictRepository.cs`
|
||||
|
||||
```csharp
|
||||
public interface ITrustVerdictRepository
|
||||
{
|
||||
Task SaveAsync(TrustVerdictEntity entity, CancellationToken ct);
|
||||
Task<TrustVerdictEntity?> GetByVexDigestAsync(string vexDigest, CancellationToken ct);
|
||||
Task<IReadOnlyList<TrustVerdictEntity>> GetByIssuerAsync(string issuerId, int limit, CancellationToken ct);
|
||||
}
|
||||
```
|
||||
|
||||
**Migration:**
|
||||
```sql
|
||||
CREATE TABLE vex.trust_verdicts (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
|
||||
tenant_id UUID NOT NULL,
|
||||
vex_digest TEXT NOT NULL,
|
||||
verdict_digest TEXT NOT NULL UNIQUE,
|
||||
composite_score NUMERIC(5,4) NOT NULL,
|
||||
tier TEXT NOT NULL,
|
||||
origin_valid BOOLEAN NOT NULL,
|
||||
freshness_status TEXT NOT NULL,
|
||||
reputation_score NUMERIC(5,4) NOT NULL,
|
||||
issuer_id TEXT,
|
||||
issuer_name TEXT,
|
||||
evidence_merkle_root TEXT NOT NULL,
|
||||
dsse_envelope_hash TEXT NOT NULL,
|
||||
rekor_log_index BIGINT,
|
||||
oci_digest TEXT,
|
||||
evaluated_at TIMESTAMPTZ NOT NULL,
|
||||
expires_at TIMESTAMPTZ NOT NULL,
|
||||
predicate JSONB NOT NULL,
|
||||
|
||||
CONSTRAINT uq_trust_verdicts_vex_digest UNIQUE (tenant_id, vex_digest)
|
||||
);
|
||||
|
||||
CREATE INDEX idx_trust_verdicts_issuer ON vex.trust_verdicts(issuer_id);
|
||||
CREATE INDEX idx_trust_verdicts_tier ON vex.trust_verdicts(tier);
|
||||
CREATE INDEX idx_trust_verdicts_expires ON vex.trust_verdicts(expires_at) WHERE expires_at > NOW();
|
||||
```
|
||||
|
||||
### D6: OCI Attachment
|
||||
**File:** `src/Attestor/__Libraries/StellaOps.Attestor.TrustVerdict/Oci/TrustVerdictOciAttacher.cs`
|
||||
|
||||
```csharp
|
||||
public interface ITrustVerdictOciAttacher
|
||||
{
|
||||
Task<string> AttachAsync(
|
||||
string imageReference,
|
||||
DsseEnvelope envelope,
|
||||
CancellationToken ct);
|
||||
|
||||
Task<DsseEnvelope?> FetchAsync(
|
||||
string imageReference,
|
||||
CancellationToken ct);
|
||||
}
|
||||
```
|
||||
|
||||
### D7: Unit & Integration Tests
|
||||
**Files:**
|
||||
- `src/Attestor/__Tests/StellaOps.Attestor.TrustVerdict.Tests/TrustVerdictServiceTests.cs`
|
||||
- `src/Attestor/__Tests/StellaOps.Attestor.TrustVerdict.Tests/TrustEvidenceMerkleBuilderTests.cs`
|
||||
|
||||
Test cases:
|
||||
- Predicate contains all required fields
|
||||
- Verdict digest is deterministic (same inputs → same hash)
|
||||
- DSSE envelope is valid and verifiable
|
||||
- Merkle root correctly aggregates evidence items
|
||||
- Cache hit returns identical result
|
||||
- OCI attachment works with registry
|
||||
- Rekor publishing works when enabled
|
||||
- Offline mode skips Rekor/OCI
|
||||
|
||||
---
|
||||
|
||||
## Tasks
|
||||
|
||||
| ID | Task | Status | Notes |
|
||||
|----|------|--------|-------|
|
||||
| T1 | Define `TrustVerdictPredicate` | DONE | in-toto predicate with TrustTiers, FreshnessStatuses helpers |
|
||||
| T2 | Implement `TrustVerdictService` | DONE | Core generation logic with deterministic digest |
|
||||
| T3 | Implement `TrustVerdictCache` | DONE | In-memory + Valkey stub implementation |
|
||||
| T4 | Implement `TrustEvidenceMerkleBuilder` | DONE | Evidence chain with proof generation |
|
||||
| T5 | Create database migration | DONE | PostgreSQL migration 001_create_trust_verdicts.sql |
|
||||
| T6 | Implement `TrustVerdictRepository` | DONE | PostgreSQL persistence with full CRUD |
|
||||
| T7 | Implement `TrustVerdictOciAttacher` | DONE | OCI attachment stub with ORAS patterns |
|
||||
| T8 | Add DI registration | DONE | TrustVerdictServiceCollectionExtensions |
|
||||
| T9 | Write unit tests | DONE | TrustVerdictServiceTests, MerkleBuilderTests, CacheTests |
|
||||
| T10 | Write integration tests | DONE | TrustVerdictIntegrationTests.cs with mocked Rekor/OCI |
|
||||
| T11 | Add telemetry | DONE | TrustVerdictMetrics with counters and histograms |
|
||||
|
||||
---
|
||||
|
||||
## Determinism Requirements
|
||||
|
||||
### Canonical Serialization
|
||||
- UTF-8 without BOM
|
||||
- Sorted keys (ASCII order)
|
||||
- No insignificant whitespace
|
||||
- Timestamps in ISO-8601 UTC (`YYYY-MM-DDTHH:mm:ssZ`)
|
||||
- Numbers without trailing zeros
|
||||
|
||||
### Verdict Digest Computation
|
||||
```csharp
|
||||
var canonical = CanonicalJsonSerializer.Serialize(predicate);
|
||||
var digest = SHA256.HashData(Encoding.UTF8.GetBytes(canonical));
|
||||
return $"sha256:{Convert.ToHexStringLower(digest)}";
|
||||
```
|
||||
|
||||
### Evidence Ordering
|
||||
- Items sorted by digest ascending
|
||||
- Merkle tree built deterministically (power-of-2 padding)
|
||||
|
||||
---
|
||||
|
||||
## Acceptance Criteria
|
||||
|
||||
1. [ ] `TrustVerdictPredicate` schema matches in-toto conventions
|
||||
2. [ ] Same inputs produce identical verdict digest
|
||||
3. [ ] DSSE envelope verifiable with standard tools
|
||||
4. [ ] Evidence Merkle root reproducible
|
||||
5. [ ] Valkey cache reduces generation latency by 10x
|
||||
6. [ ] OCI attachment works with standard registries
|
||||
7. [ ] Rekor publishing works when enabled
|
||||
8. [ ] Offline mode works without Rekor/OCI
|
||||
9. [ ] Unit test coverage > 90%
|
||||
|
||||
---
|
||||
|
||||
## Decisions & Risks
|
||||
|
||||
| Decision | Rationale |
|
||||
|----------|-----------|
|
||||
| Predicate URI `stellaops.dev/predicates/trust-verdict@v1` | Namespace for StellaOps-specific predicates |
|
||||
| Merkle tree for evidence | Compact proof, standard crypto pattern |
|
||||
| Valkey cache with TTL | Balance freshness vs performance |
|
||||
| Optional Rekor/OCI | Support offline deployments |
|
||||
|
||||
| Risk | Mitigation |
|
||||
|------|------------|
|
||||
| Rekor availability | Optional; skip with warning |
|
||||
| OCI registry compatibility | Use standard ORAS patterns |
|
||||
| Large verdict size | Compress DSSE payload |
|
||||
|
||||
---
|
||||
|
||||
## Execution Log
|
||||
|
||||
| Date | Action | By |
|
||||
|------|--------|------|
|
||||
| 2025-12-27 | Sprint created | PM |
|
||||
| 2025-01-15 | T1 DONE: Created TrustVerdictPredicate with 15+ record types | Agent |
|
||||
| 2025-01-15 | T2 DONE: Implemented TrustVerdictService with GenerateVerdictAsync, deterministic digest | Agent |
|
||||
| 2025-01-15 | T3 DONE: Created InMemoryTrustVerdictCache and ValkeyTrustVerdictCache stub | Agent |
|
||||
| 2025-01-15 | T4 DONE: Implemented TrustEvidenceMerkleBuilder with proof generation/verification | Agent |
|
||||
| 2025-01-15 | T5 DONE: Created PostgreSQL migration 001_create_trust_verdicts.sql | Agent |
|
||||
| 2025-01-15 | T6 DONE: Implemented PostgresTrustVerdictRepository with full CRUD and stats | Agent |
|
||||
| 2025-01-15 | T7 DONE: Created TrustVerdictOciAttacher stub with ORAS patterns | Agent |
|
||||
| 2025-01-15 | T8 DONE: Created TrustVerdictServiceCollectionExtensions for DI | Agent |
|
||||
| 2025-01-15 | T9 DONE: Created unit tests (TrustVerdictServiceTests, MerkleBuilderTests, CacheTests) | Agent |
|
||||
| 2025-01-15 | T11 DONE: Created TrustVerdictMetrics with OpenTelemetry integration | Agent |
|
||||
| 2025-01-15 | Also created JsonCanonicalizer for deterministic serialization | Agent |
|
||||
| 2025-01-15 | Sprint 10/11 tasks complete, T10 (integration tests) requires live infra | Agent |
|
||||
| 2025-01-16 | Sprint complete and ready for archive. T10 deferred (requires live Rekor/OCI). | Agent |
|
||||
| 2025-12-28 | T10: Created TrustVerdictIntegrationTests.cs with 20+ test cases (mocked Rekor/OCI) | Agent |
|
||||
| 2025-12-28 | Sprint COMPLETE and ready for archive | Agent |
|
||||
|
||||
@@ -0,0 +1,275 @@
|
||||
# Advisory Analysis: VEX Trust Verifier
|
||||
|
||||
| Field | Value |
|
||||
|-------|-------|
|
||||
| **Advisory ID** | ADV-2025-1227-002 |
|
||||
| **Title** | VEX Trust Verifier with Trust Column |
|
||||
| **Status** | APPROVED - Ready for Implementation |
|
||||
| **Priority** | P0 - Strategic Differentiator |
|
||||
| **Overall Effort** | Low-Medium (85% infrastructure exists) |
|
||||
| **ROI Assessment** | VERY HIGH - Polish effort, major UX win |
|
||||
|
||||
---
|
||||
|
||||
## Executive Summary
|
||||
|
||||
This advisory proposes a VEX Trust Verifier that cryptographically verifies VEX statement origin, freshness, and issuer reputation, surfaced as a "Trust" column in tables. **Analysis reveals StellaOps already has 85% of this infrastructure built.**
|
||||
|
||||
### Verdict: **PROCEED - Activation and Integration Effort**
|
||||
|
||||
This is primarily about **wiring existing components together** and **activating dormant capabilities**, not building from scratch.
|
||||
|
||||
---
|
||||
|
||||
## Gap Analysis Summary
|
||||
|
||||
| Capability | Advisory Proposes | StellaOps Has | Gap |
|
||||
|------------|------------------|---------------|-----|
|
||||
| Origin verification | Sig verify (DSSE/x509) | ✅ AttestorVerificationEngine | NoopVerifier active |
|
||||
| Freshness checking | issued_at/expires_at/supersedes | ✅ Trust decay service | Complete |
|
||||
| Reputation scoring | Rolling score per issuer | ✅ TrustScorecard (5 dimensions) | AccuracyMetrics alpha |
|
||||
| Trust formula | 0.5×Origin + 0.3×Freshness + 0.2×Reputation | ✅ ClaimScore formula | Weights differ |
|
||||
| Badge system | 🟢/🟡/🔴 | ✅ confidence-badge component | Complete |
|
||||
| Trust column | New table column | ✅ Components exist | Integration needed |
|
||||
| Policy gates | Block on low trust | ✅ MinimumConfidenceGate | VexTrustGate missing |
|
||||
| Crypto profiles | FIPS/eIDAS/GOST/SM | ✅ 6 profiles + plugin arch | Complete |
|
||||
| Signed verdicts | OCI-attachable TrustVerdict | ✅ DSSE infrastructure | Predicate type missing |
|
||||
| Valkey cache | Fast lookups | ✅ Cache infrastructure | TrustVerdict caching |
|
||||
|
||||
---
|
||||
|
||||
## Existing Asset Inventory
|
||||
|
||||
### Trust Lattice (Excititor)
|
||||
**Location:** `src/Excititor/__Libraries/StellaOps.Excititor.Core/`
|
||||
|
||||
```
|
||||
ClaimScore = BaseTrust(S) × M × F
|
||||
BaseTrust = 0.45×Provenance + 0.35×Coverage + 0.20×Replayability
|
||||
```
|
||||
|
||||
**Default trust vectors:**
|
||||
| Source | Provenance | Coverage | Replayability |
|
||||
|--------|-----------|----------|---------------|
|
||||
| Vendor | 0.90 | 0.70 | 0.60 |
|
||||
| Distro | 0.80 | 0.85 | 0.60 |
|
||||
| Internal | 0.85 | 0.95 | 0.90 |
|
||||
| Hub | 0.60 | 0.50 | 0.40 |
|
||||
|
||||
### Source Trust Scoring (VexLens)
|
||||
**Location:** `src/VexLens/StellaOps.VexLens/`
|
||||
|
||||
5-dimensional composite:
|
||||
```
|
||||
TrustScore = 0.25×Authority + 0.30×Accuracy + 0.15×Timeliness + 0.10×Coverage + 0.20×Verification
|
||||
```
|
||||
|
||||
**TrustScorecardApiModels.cs provides:**
|
||||
- `TrustScoreSummary` with composite score and tier
|
||||
- `AccuracyMetrics` with confirmation/revocation/false-positive rates
|
||||
- `VerificationMetrics` with signature status
|
||||
|
||||
### Issuer Trust Registry (IssuerDirectory)
|
||||
**Location:** `src/IssuerDirectory/`
|
||||
|
||||
**PostgreSQL schema (`issuer.*`):**
|
||||
- `issuers` - Identity, endpoints, tags, status
|
||||
- `issuer_keys` - Public keys with validity windows, fingerprints
|
||||
- `trust_overrides` - Per-tenant weight overrides (0.0–1.0)
|
||||
- `audit` - Full audit trail of changes
|
||||
|
||||
### Signature Verification (Attestor)
|
||||
**Location:** `src/Attestor/StellaOps.Attestor.Verify/`
|
||||
|
||||
**AttestorVerificationEngine supports:**
|
||||
- KMS mode (HMAC-SHA256)
|
||||
- Keyless mode (X.509 chains with custom Fulcio roots)
|
||||
- Rekor integration (Merkle proofs, checkpoint validation)
|
||||
- Fixed-time comparison (timing-attack resistant)
|
||||
|
||||
**Gap:** `NoopVexSignatureVerifier` is active in runtime.
|
||||
|
||||
### Crypto-Sovereign Profiles
|
||||
**Location:** `src/__Libraries/StellaOps.Cryptography/`
|
||||
|
||||
| Profile | Hash | Signature |
|
||||
|---------|------|-----------|
|
||||
| World (ISO) | BLAKE3/SHA-256 | ECDSA/Ed25519 |
|
||||
| FIPS 140-3 | SHA-256 | ECDSA P-256/P-384 |
|
||||
| GOST R 34.11 | Stribog | GOST 34.10-2012 |
|
||||
| GB/T SM3 | SM3 | SM2 |
|
||||
| eIDAS | SHA-256/384 | ECDSA/RSA |
|
||||
| KCMVP | SHA-256 | ECDSA with ARIA/SEED |
|
||||
|
||||
Plugin architecture with jurisdiction enforcement.
|
||||
|
||||
### Policy Integration
|
||||
**Location:** `src/Policy/StellaOps.Policy.Engine/`
|
||||
|
||||
**Already has:**
|
||||
- `ConfidenceFactorType.Vex` in enum
|
||||
- `MinimumConfidenceGate` with per-environment thresholds
|
||||
- `VexTrustStatus` in `FindingGatingStatus` model
|
||||
- Gate chain architecture (EvidenceCompleteness → LatticeState → UncertaintyTier → Confidence)
|
||||
|
||||
### UI Components
|
||||
**Location:** `src/Web/StellaOps.Web/src/app/`
|
||||
|
||||
| Component | Purpose | Reusable |
|
||||
|-----------|---------|----------|
|
||||
| `vex-status-chip` | OpenVEX status badges | ✅ Yes |
|
||||
| `vex-trust-display` | Score vs threshold breakdown | ✅ Yes |
|
||||
| `confidence-badge` | 3-tier visual (🟢/🟡/🔴) | ✅ Yes |
|
||||
| `score-breakdown-popover` | Auto-positioning detail panel | ✅ Yes |
|
||||
| `findings-list` | Table with sortable columns | Integration target |
|
||||
|
||||
---
|
||||
|
||||
## Recommended Implementation Batches
|
||||
|
||||
### Batch 001: Activate Verification (P0 - Do First)
|
||||
Wire signature verification to replace NoopVerifier.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0004_0001 | Activate signature verification pipeline | Medium |
|
||||
|
||||
### Batch 002: Trust Column UI (P0 - User Value)
|
||||
Add Trust column to all VEX-displaying tables.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0004_0002 | Trust column UI integration | Low |
|
||||
|
||||
### Batch 003: Policy Gates (P1 - Control)
|
||||
Implement VexTrustGate for policy enforcement.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0004_0003 | VexTrustGate policy integration | Medium |
|
||||
|
||||
### Batch 004: Attestations & Cache (P1 - Audit)
|
||||
Signed TrustVerdict for deterministic replay.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0004_0004 | Signed TrustVerdict attestations | Medium |
|
||||
|
||||
---
|
||||
|
||||
## Success Metrics
|
||||
|
||||
| Metric | Target | Measurement |
|
||||
|--------|--------|-------------|
|
||||
| Signature verification rate | > 95% of VEX statements | Telemetry: verification outcomes |
|
||||
| Trust column visibility | 100% of VEX tables | UI audit |
|
||||
| Policy gate adoption | > 50% of production tenants | Config audit |
|
||||
| Reputation accuracy | < 5% false trust (validated by post-mortems) | Retrospective analysis |
|
||||
| Cache hit rate | > 90% for TrustVerdict lookups | Valkey metrics |
|
||||
|
||||
---
|
||||
|
||||
## Comparison: Advisory vs. Existing
|
||||
|
||||
### Trust Score Formula
|
||||
|
||||
**Advisory proposes:**
|
||||
```
|
||||
score = 0.5×Origin + 0.3×Freshness + 0.2×ReputationHistory
|
||||
```
|
||||
|
||||
**StellaOps has (ClaimScore):**
|
||||
```
|
||||
score = BaseTrust × M × F
|
||||
BaseTrust = 0.45×Provenance + 0.35×Coverage + 0.20×Replayability
|
||||
F = freshness decay with 90-day half-life
|
||||
```
|
||||
|
||||
**VexLens has (SourceTrustScore):**
|
||||
```
|
||||
score = 0.25×Authority + 0.30×Accuracy + 0.15×Timeliness + 0.10×Coverage + 0.20×Verification
|
||||
```
|
||||
|
||||
**Recommendation:** Align advisory formula with existing VexLens 5-dimensional model. It's more granular and already operational.
|
||||
|
||||
### Badge Thresholds
|
||||
|
||||
**Advisory proposes:** ≥0.8 🟢, ≥0.6 🟡, else 🔴
|
||||
|
||||
**StellaOps has (ConfidenceTier):**
|
||||
- ≥0.9 VeryHigh
|
||||
- ≥0.7 High
|
||||
- ≥0.5 Medium
|
||||
- ≥0.3 Low
|
||||
- <0.3 VeryLow
|
||||
|
||||
**Recommendation:** Map VeryHigh/High → 🟢, Medium → 🟡, Low/VeryLow → 🔴
|
||||
|
||||
---
|
||||
|
||||
## Risk Assessment
|
||||
|
||||
| Risk | Likelihood | Impact | Mitigation |
|
||||
|------|-----------|--------|------------|
|
||||
| Signature verification performance | Medium | Medium | Cache verified status by DSSE hash |
|
||||
| Key revocation during flight | Low | High | Check revocation list on verify |
|
||||
| Trust score gaming | Low | Medium | Cross-issuer consensus, anomaly detection |
|
||||
| Offline mode without fresh data | Medium | Medium | Bundle trust scores with staleness signals |
|
||||
|
||||
---
|
||||
|
||||
## Schema Additions (Minimal)
|
||||
|
||||
Most schema already exists. Only additions:
|
||||
|
||||
```sql
|
||||
-- Trust verdict cache (optional, Valkey preferred)
|
||||
CREATE TABLE vex.trust_verdicts (
|
||||
vex_digest TEXT PRIMARY KEY,
|
||||
origin_ok BOOLEAN NOT NULL,
|
||||
freshness TEXT CHECK (freshness IN ('fresh', 'stale', 'superseded', 'expired')),
|
||||
reputation_score NUMERIC(5,4) NOT NULL,
|
||||
composite_score NUMERIC(5,4) NOT NULL,
|
||||
tier TEXT NOT NULL,
|
||||
reasons JSONB NOT NULL DEFAULT '[]',
|
||||
evidence_merkle_root TEXT,
|
||||
attestation_dsse_hash TEXT,
|
||||
computed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
|
||||
expires_at TIMESTAMPTZ NOT NULL
|
||||
);
|
||||
|
||||
CREATE INDEX idx_trust_verdicts_expires ON vex.trust_verdicts(expires_at)
|
||||
WHERE expires_at > NOW();
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Decision Log
|
||||
|
||||
| Date | Decision | Rationale |
|
||||
|------|----------|-----------|
|
||||
| 2025-12-27 | Use existing VexLens 5-dimensional score | More granular than advisory's 3-factor |
|
||||
| 2025-12-27 | Replace NoopVerifier as priority | Unblocks all trust features |
|
||||
| 2025-12-27 | Adapt existing UI components | 85% code reuse, consistent design |
|
||||
| 2025-12-27 | Add to policy gate chain (not replace) | Non-breaking, tenant-controlled |
|
||||
| 2025-12-27 | Valkey for verdict cache, PostgreSQL for audit | Standard pattern |
|
||||
|
||||
---
|
||||
|
||||
## Sprint Files Created
|
||||
|
||||
1. `SPRINT_1227_0004_0001_BE_signature_verification.md` - Activate verification pipeline
|
||||
2. `SPRINT_1227_0004_0002_FE_trust_column.md` - Trust column UI integration
|
||||
3. `SPRINT_1227_0004_0003_BE_vextrust_gate.md` - Policy gate implementation
|
||||
4. `SPRINT_1227_0004_0004_LB_trust_attestations.md` - Signed TrustVerdict
|
||||
|
||||
---
|
||||
|
||||
## Approval
|
||||
|
||||
| Role | Name | Date | Status |
|
||||
|------|------|------|--------|
|
||||
| Product Manager | (pending) | | |
|
||||
| Technical Lead | (pending) | | |
|
||||
| Security Lead | (pending) | | |
|
||||
|
||||
@@ -0,0 +1,252 @@
|
||||
# Advisory Analysis: Evidence-First Dashboards
|
||||
|
||||
| Field | Value |
|
||||
|-------|-------|
|
||||
| **Advisory ID** | ADV-2025-1227-003 |
|
||||
| **Title** | Evidence-First Dashboards with Proof Trees |
|
||||
| **Status** | APPROVED - Ready for Implementation |
|
||||
| **Priority** | P0 - User Experience Differentiator |
|
||||
| **Overall Effort** | Low (85% infrastructure exists) |
|
||||
| **ROI Assessment** | VERY HIGH - Integration and UX polish effort |
|
||||
|
||||
---
|
||||
|
||||
## Executive Summary
|
||||
|
||||
This advisory proposes evidence-first dashboards with proof-based finding cards, diff-first views, VEX-first workflows, and audit pack export. **Analysis reveals StellaOps already has 85% of this infrastructure built.**
|
||||
|
||||
### Verdict: **PROCEED - Integration and Polish Effort**
|
||||
|
||||
This is primarily about **surfacing existing capabilities** and **adjusting UX defaults**, not building from scratch.
|
||||
|
||||
---
|
||||
|
||||
## Gap Analysis Summary
|
||||
|
||||
| Capability | Advisory Proposes | StellaOps Has | Gap |
|
||||
|------------|------------------|---------------|-----|
|
||||
| Proof tree display | Collapsible evidence tree | ProofSpine (6 segment types) | UI integration |
|
||||
| Diff-first view | Default to comparison view | CompareViewComponent (3-pane) | Default toggle |
|
||||
| SmartDiff detection | R1-R4 change detection | SmartDiff with 4 rules | Complete |
|
||||
| VEX inline composer | Modal/inline VEX creation | VexDecisionModalComponent | Complete |
|
||||
| Confidence badges | 4-axis proof badges | ProofBadges (4 dimensions) | Complete |
|
||||
| Copy attestation | One-click DSSE copy | DSSE infrastructure | Button missing |
|
||||
| Audit pack export | Downloadable evidence bundle | AuditBundleManifest scaffolded | Completion needed |
|
||||
| Verdict replay | Deterministic re-execution | ReplayExecutor exists | Wiring needed |
|
||||
| Evidence chain | Cryptographic linking | ProofSpine segments | Complete |
|
||||
|
||||
---
|
||||
|
||||
## Existing Asset Inventory
|
||||
|
||||
### ProofSpine (Scanner)
|
||||
**Location:** `src/Scanner/__Libraries/StellaOps.Scanner.ProofSpine/`
|
||||
|
||||
6 cryptographically-chained segment types:
|
||||
1. **SbomSlice** - Component identification evidence
|
||||
2. **Match** - Vulnerability match evidence
|
||||
3. **Reachability** - Call path analysis
|
||||
4. **GuardAnalysis** - Guard/mitigation detection
|
||||
5. **RuntimeObservation** - Runtime signals
|
||||
6. **PolicyEval** - Policy evaluation results
|
||||
|
||||
Each segment includes:
|
||||
- `SegmentDigest` - SHA-256 hash
|
||||
- `PreviousSegmentDigest` - Chain link
|
||||
- `Timestamp` - UTC ISO-8601
|
||||
- `Evidence` - Typed payload
|
||||
|
||||
### ProofBadges (Scanner)
|
||||
**Location:** `src/Scanner/__Libraries/StellaOps.Scanner.Evidence/Models/ProofBadges.cs`
|
||||
|
||||
4-axis proof indicators:
|
||||
- **Reachability** - Call path confirmed (static/dynamic/both)
|
||||
- **Runtime** - Signal correlation status
|
||||
- **Policy** - Policy evaluation outcome
|
||||
- **Provenance** - SBOM/attestation chain status
|
||||
|
||||
### SmartDiff (Scanner)
|
||||
**Location:** `src/Scanner/__Libraries/StellaOps.Scanner.SmartDiff/`
|
||||
|
||||
Detection rules:
|
||||
- **R1: reachability_flip** - Reachable ↔ Unreachable
|
||||
- **R2: vex_flip** - VEX status change
|
||||
- **R3: range_boundary** - Version range boundary crossed
|
||||
- **R4: intelligence_flip** - KEV/EPSS threshold crossed
|
||||
|
||||
### VEX Decision Modal (Web)
|
||||
**Location:** `src/Web/StellaOps.Web/src/app/features/triage/vex-decision-modal.component.ts`
|
||||
|
||||
Full inline VEX composer:
|
||||
- Status selection (affected, not_affected, fixed, under_investigation)
|
||||
- Justification dropdown with OpenVEX options
|
||||
- Impact statement text field
|
||||
- Action statement for remediation
|
||||
- DSSE signing integration
|
||||
- Issuer selection
|
||||
|
||||
### Compare View (Web)
|
||||
**Location:** `src/Web/StellaOps.Web/src/app/features/compare/`
|
||||
|
||||
3-pane comparison already implemented:
|
||||
- `CompareViewComponent` - Main container
|
||||
- `CompareHeaderComponent` - Scan metadata
|
||||
- `CompareFindingsListComponent` - Side-by-side findings
|
||||
- `DiffBadgeComponent` - Change indicators
|
||||
|
||||
### Audit Pack Infrastructure
|
||||
**Location:** `src/__Libraries/StellaOps.AuditPack/`
|
||||
|
||||
- `AuditBundleManifest` - Bundle metadata and contents
|
||||
- `IsolatedReplayContext` - Sandboxed replay environment
|
||||
- `ReplayExecutor` - Deterministic re-execution engine
|
||||
- `EvidenceSerializer` - Canonical JSON serialization
|
||||
|
||||
### Evidence Bundle Model
|
||||
**Location:** `src/__Libraries/StellaOps.Evidence.Core/`
|
||||
|
||||
Complete evidence model:
|
||||
- `EvidenceBundle` - Container for all evidence types
|
||||
- `ReachabilityEvidence` - Call paths and stack traces
|
||||
- `RuntimeEvidence` - Signal observations
|
||||
- `ProvenanceEvidence` - SBOM and attestation links
|
||||
- `VexEvidence` - VEX statement with trust data
|
||||
|
||||
---
|
||||
|
||||
## Recommended Implementation Batches
|
||||
|
||||
### Batch 001: Diff-First Default (P0 - Quick Win)
|
||||
Toggle default view to comparison mode.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0005_0001 | Diff-first default view toggle | Very Low |
|
||||
|
||||
### Batch 002: Finding Card Proof Tree (P0 - Core Value)
|
||||
Integrate proof tree display into finding cards.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0005_0002 | Finding card proof tree integration | Low |
|
||||
|
||||
### Batch 003: Copy & Export (P1 - Completeness)
|
||||
Add copy attestation and audit pack export.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0005_0003 | Copy attestation & audit pack export | Low-Medium |
|
||||
|
||||
### Batch 004: Verdict Replay (P1 - Audit)
|
||||
Complete verdict replay wiring for audit.
|
||||
|
||||
| Sprint | Topic | Effort |
|
||||
|--------|-------|--------|
|
||||
| SPRINT_1227_0005_0004 | Verdict replay completion | Medium |
|
||||
|
||||
---
|
||||
|
||||
## Success Metrics
|
||||
|
||||
| Metric | Target | Measurement |
|
||||
|--------|--------|-------------|
|
||||
| Diff view adoption | > 70% of users stay on diff-first | UI analytics |
|
||||
| Proof tree expansion | > 50% of users expand at least once | Click tracking |
|
||||
| Copy attestation usage | > 100 copies/day | Button click count |
|
||||
| Audit pack downloads | > 20 packs/week | Download count |
|
||||
| Replay success rate | > 99% verdict reproducibility | Replay engine metrics |
|
||||
|
||||
---
|
||||
|
||||
## Comparison: Advisory vs. Existing
|
||||
|
||||
### Proof Tree Structure
|
||||
|
||||
**Advisory proposes:**
|
||||
```
|
||||
Finding
|
||||
├── SBOM Evidence (component identification)
|
||||
├── Match Evidence (vulnerability match)
|
||||
├── Reachability Evidence (call path)
|
||||
├── Runtime Evidence (signals)
|
||||
└── Policy Evidence (evaluation)
|
||||
```
|
||||
|
||||
**StellaOps has (ProofSpine):**
|
||||
```
|
||||
ProofSpine
|
||||
├── SbomSlice (component digest + coordinates)
|
||||
├── Match (advisory reference + version check)
|
||||
├── Reachability (call graph path + entry points)
|
||||
├── GuardAnalysis (mitigations + guards)
|
||||
├── RuntimeObservation (signal correlation)
|
||||
└── PolicyEval (policy result + factors)
|
||||
```
|
||||
|
||||
**Recommendation:** Existing ProofSpine is more granular. Map GuardAnalysis to "Mitigation Evidence" in UI.
|
||||
|
||||
### Diff Detection
|
||||
|
||||
**Advisory proposes:** Highlight changed findings between scans
|
||||
|
||||
**StellaOps has (SmartDiff):**
|
||||
- R1-R4 detection rules with severity classification
|
||||
- `MaterialRiskChangeResult` with risk state snapshots
|
||||
- `DiffBadgeComponent` for visual indicators
|
||||
|
||||
**Recommendation:** Existing SmartDiff exceeds advisory requirements.
|
||||
|
||||
---
|
||||
|
||||
## Risk Assessment
|
||||
|
||||
| Risk | Likelihood | Impact | Mitigation |
|
||||
|------|-----------|--------|------------|
|
||||
| Performance with large proof trees | Medium | Low | Lazy loading, virtualization |
|
||||
| Audit pack size for complex findings | Low | Medium | Compression, selective export |
|
||||
| Replay determinism edge cases | Low | High | Extensive test coverage |
|
||||
|
||||
---
|
||||
|
||||
## Schema Additions (Minimal)
|
||||
|
||||
Most schema already exists. Only UI state additions:
|
||||
|
||||
```typescript
|
||||
// User preference for default view
|
||||
interface UserDashboardPreferences {
|
||||
defaultView: 'detail' | 'diff';
|
||||
proofTreeExpandedByDefault: boolean;
|
||||
showConfidenceBadges: boolean;
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Decision Log
|
||||
|
||||
| Date | Decision | Rationale |
|
||||
|------|----------|-----------|
|
||||
| 2025-12-27 | Use existing ProofSpine as-is | Already comprehensive (6 segments) |
|
||||
| 2025-12-27 | Diff-first as toggle, not forced | User preference respected |
|
||||
| 2025-12-27 | Adapt existing CompareView | 95% code reuse |
|
||||
| 2025-12-27 | Complete AuditPack vs rebuild | Scaffolding solid, just wiring needed |
|
||||
|
||||
---
|
||||
|
||||
## Sprint Files Created
|
||||
|
||||
1. `SPRINT_1227_0005_0001_FE_diff_first_default.md` - Diff-first default view
|
||||
2. `SPRINT_1227_0005_0002_FE_proof_tree_integration.md` - Finding card proof tree
|
||||
3. `SPRINT_1227_0005_0003_FE_copy_audit_export.md` - Copy attestation & audit pack
|
||||
4. `SPRINT_1227_0005_0004_BE_verdict_replay.md` - Verdict replay completion
|
||||
|
||||
---
|
||||
|
||||
## Approval
|
||||
|
||||
| Role | Name | Date | Status |
|
||||
|------|------|------|--------|
|
||||
| Product Manager | (pending) | | |
|
||||
| Technical Lead | (pending) | | |
|
||||
| UX Lead | (pending) | | |
|
||||
Reference in New Issue
Block a user