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- Added detailed task completion records for KMS interface implementation and CLI support for file-based keys. - Documented security enhancements including Argon2id password hashing, audit event contracts, and rate limiting configurations. - Included scoped service support and integration updates for the Plugin platform, ensuring proper DI handling and testing coverage.
112 lines
4.6 KiB
Markdown
112 lines
4.6 KiB
Markdown
# Aggregation-Only Guard Library Reference
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> **Packages:** `StellaOps.Aoc`, `StellaOps.Aoc.AspNetCore`
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> **Related tasks:** `WEB-AOC-19-001`, `WEB-AOC-19-003`, `DEVOPS-AOC-19-001`
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> **Audience:** Concelier/Excititor service owners, Platform guild, QA
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The Aggregation-Only Contract (AOC) guard library enforces the canonical ingestion
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rules described in `docs/ingestion/aggregation-only-contract.md`. Service owners
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should use the guard whenever raw advisory or VEX payloads are accepted so that
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forbidden fields are rejected long before they reach MongoDB.
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## Packages
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### `StellaOps.Aoc`
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- `IAocGuard` / `AocWriteGuard` — validate JSON payloads and emit `AocGuardResult`.
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- `AocGuardOptions` — toggles for signature enforcement, tenant requirements, and required top-level fields.
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- `AocViolation` / `AocViolationCode` — structured violations surfaced to callers.
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- `ServiceCollectionExtensions.AddAocGuard()` — DI helper that registers the singleton guard.
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- `AocGuardExtensions.ValidateOrThrow()` — throws `AocGuardException` when validation fails.
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### `StellaOps.Aoc.AspNetCore`
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- `AocGuardEndpointFilter<TRequest>` — Minimal API endpoint filter that evaluates request payloads through the guard before invoking handlers.
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- `AocHttpResults.Problem()` — Produces a RFC 7807 payload that includes violation codes, suitable for API responses.
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## Minimal API integration
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```csharp
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using StellaOps.Aoc;
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using StellaOps.Aoc.AspNetCore.Routing;
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using StellaOps.Aoc.AspNetCore.Results;
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var builder = WebApplication.CreateBuilder(args);
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builder.Services.AddAocGuard();
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builder.Services.Configure<AocGuardOptions>(options =>
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{
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options.RequireSignatureMetadata = true;
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options.RequireTenant = true;
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});
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var app = builder.Build();
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app.MapPost("/ingest", async (IngestionRequest request, IAocGuard guard, ILogger<Program> logger) =>
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{
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// additional application logic
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return Results.Accepted();
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})
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.AddEndpointFilter(new AocGuardEndpointFilter<IngestionRequest>(
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request => new object?[] { request.Payload },
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serializerOptions: null,
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guardOptions: null))
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.ProducesProblem(StatusCodes.Status400BadRequest)
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.WithTags("AOC");
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app.UseExceptionHandler(errorApp =>
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{
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errorApp.Run(async context =>
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{
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var exceptionHandler = context.Features.Get<IExceptionHandlerFeature>();
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if (exceptionHandler?.Error is AocGuardException guardException)
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{
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var result = AocHttpResults.Problem(context, guardException);
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await result.ExecuteAsync(context);
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return;
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}
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context.Response.StatusCode = StatusCodes.Status500InternalServerError;
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});
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});
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```
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Key points:
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- Register the guard singleton before wiring repositories or worker services.
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- Use `AocGuardEndpointFilter<TRequest>` to protect Minimal API endpoints. The `payloadSelector`
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can yield multiple payloads (e.g. batch ingestion) and the filter will validate each one.
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- Wrap guard exceptions with `AocHttpResults.Problem` to ensure clients receive machine-readables codes (`ERR_AOC_00x`).
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## Worker / repository usage
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Inject `IAocGuard` (or a module-specific wrapper such as `IVexRawWriteGuard`) anywhere documents
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are persisted. Call `ValidateOrThrow` before writes to guarantee fail-fast behaviour, for example:
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```csharp
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public sealed class AdvisoryRawRepository
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{
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private readonly IAocGuard _guard;
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public AdvisoryRawRepository(IAocGuard guard) => _guard = guard;
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public Task WriteAsync(JsonDocument document, CancellationToken cancellationToken)
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{
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_guard.ValidateOrThrow(document.RootElement);
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// proceed with storage logic
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}
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}
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```
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## Configuration tips
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- Adjust `AocGuardOptions.RequiredTopLevelFields` when staging new schema changes. All configured names are case-insensitive.
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- Set `RequireSignatureMetadata = false` for legacy feeds that do not provide signature envelopes yet; track the waiver in the module backlog.
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- Use module-specific wrappers (`AddConcelierAocGuards`, `AddExcititorAocGuards`) to combine guard registration with domain exceptions and metrics.
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## Testing guidance
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- Unit-test guard behaviour with fixture payloads (see `src/Aoc/__Tests`).
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- Service-level tests should assert that ingestion endpoints return `ERR_AOC_*` codes via `AocHttpResults`.
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- CI must run `stella aoc verify` once CLI support lands (`DEVOPS-AOC-19-002`).
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- Roslyn analyzer enforcement (`WEB-AOC-19-003`) will ensure the guard is registered; keep services wired through the shared extensions to prepare for that gate.
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For questions or updates, coordinate with the BE‑Base Platform guild and reference `WEB-AOC-19-001`.
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