merge(secrets): Task 3 client half — pull-only sweep + per-row parse isolation

Claude-Session: https://claude.ai/code/session_014WNM4vjoVksyyBraTXSZE1
This commit is contained in:
Joseph Doherty
2026-08-07 06:32:04 -04:00
10 changed files with 2005 additions and 0 deletions
@@ -0,0 +1,96 @@
using Grpc.Net.Client;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.DependencyInjection;
/// <summary>
/// Dependency-injection entry point for a site node that follows the central-hosted secrets hub.
/// </summary>
/// <remarks>
/// <para>
/// <b>The hub and every follower need the same KEK.</b> Only ciphertext crosses the wire, so a node
/// whose master key differs cannot decrypt rows central wrote — it fails closed on resolve with a
/// <c>kek_id</c> mismatch, which reads like data corruption but is a deployment error.
/// </para>
/// <para>
/// <b>This is the follower half only.</b> Central hosts the hub service and must not register this
/// client; a site node registers this client and must not host the service. Nothing here can push a
/// row hub-ward — the contract has no write RPC — so the direction of replication is a property of
/// the deployment topology rather than a setting that could be got wrong.
/// </para>
/// </remarks>
public static class SecretsGrpcHubClientExtensions
{
/// <summary>
/// Service key under which this package's <see cref="GrpcChannel"/> is registered, so it can
/// never be confused with a channel the application registered for something else.
/// </summary>
public const string ChannelServiceKey = "zb-secrets-grpc-hub";
/// <summary>
/// Registers the pull-only hub client and its background sweep: a channel to the configured
/// endpoint, the generated gRPC client, the reader seam over it, and a hosted service that keeps
/// the node's local store converged with central.
/// </summary>
/// <remarks>
/// The local <see cref="ISecretStore"/> is <b>not</b> registered or decorated here — call
/// <c>AddZbSecrets</c> as usual and this sits alongside it. That is the whole difference from the
/// SQL-Server hub-replication mode, which wraps the store in a publishing decorator: pull-only
/// means local writes never leave the node, so there is nothing to publish and the store stays
/// exactly as the application configured it. A host that forgets <c>AddZbSecrets</c> fails loudly
/// at startup when the sweep cannot resolve the store, rather than silently replicating nothing.
/// </remarks>
/// <param name="services">The service collection to add to.</param>
/// <param name="configuration">The application configuration.</param>
/// <param name="sectionPath">Configuration section holding the hub-client options.</param>
/// <returns>The same <paramref name="services"/> instance, for chaining.</returns>
/// <exception cref="InvalidOperationException">
/// The bound options are unusable — see <see cref="SecretsGrpcHubClientOptions.Validate"/>.
/// </exception>
public static IServiceCollection AddZbSecretsGrpcHubClient(
this IServiceCollection services,
IConfiguration configuration,
string sectionPath = SecretsGrpcHubClientOptions.DefaultSectionPath)
{
ArgumentNullException.ThrowIfNull(services);
ArgumentNullException.ThrowIfNull(configuration);
ArgumentException.ThrowIfNullOrWhiteSpace(sectionPath);
IConfigurationSection section = configuration.GetSection(sectionPath);
services.Configure<SecretsGrpcHubClientOptions>(section);
// Bind and validate NOW as well as through the options pipeline: a missing endpoint or an
// unset bearer token should fail at startup with a message naming the key, not surface as a
// sweep that warns once every interval and never converges. The eagerly-bound instance is
// discarded immediately — it is a credential holder, and everything downstream reads the
// options from IOptions rather than closing over it.
var eager = new SecretsGrpcHubClientOptions();
section.Bind(eager);
eager.Validate(sectionPath);
// Singleton, so the container owns its disposal — a channel per sweep would leak an HTTP/2
// connection every interval. KEYED, because GrpcChannel is a framework type an application
// very plausibly registers for one of its own gRPC dependencies: an unkeyed TryAddSingleton
// would silently lose to that registration and this client would then dial someone else's
// endpoint with the hub credential attached.
services.TryAddKeyedSingleton(ChannelServiceKey, (sp, _) => GrpcChannel.ForAddress(
sp.GetRequiredService<IOptions<SecretsGrpcHubClientOptions>>().Value.Endpoint));
services.TryAddSingleton<ISecretsHubReader>(sp => new GrpcSecretsHubClient(
new SecretsHub.SecretsHubClient(
sp.GetRequiredKeyedService<GrpcChannel>(ChannelServiceKey)),
sp.GetRequiredService<IOptions<SecretsGrpcHubClientOptions>>(),
sp.GetRequiredService<ILogger<GrpcSecretsHubClient>>(),
sp.GetService<TimeProvider>()));
services.AddHostedService<GrpcSecretSyncService>();
return services;
}
}
@@ -0,0 +1,148 @@
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replication;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc;
/// <summary>
/// Keeps a site node's local secret store converged with the central-hosted hub by running a
/// <b>pull-only</b> anti-entropy sweep on an interval.
/// </summary>
/// <remarks>
/// <para>
/// This is the SQL-Server package's sync service with one half removed, and the removal is the
/// design. In this topology every update originates at central and a site node is a strict follower,
/// so there is no push set to compute and no local write to propagate outward. The wire contract has
/// no write RPC to push with either — the narrow contract IS the enforcement, and this service is
/// kept honest to match it so the invariant reads the same from both ends.
/// </para>
/// <para>
/// The local store is left completely untouched as a write target for ordinary local use: nothing
/// here decorates it, so local reads and any local writes behave exactly as they did before
/// replication was switched on. This sweep is the only writer that carries hub state into it.
/// </para>
/// <para>
/// The sweep never throws out of <see cref="ExecuteAsync"/>: a hub outage must degrade the node to
/// "serving its last-known-good local secrets" rather than crash the host. Failures are logged once
/// and retried on the next tick.
/// </para>
/// </remarks>
internal sealed partial class GrpcSecretSyncService : BackgroundService
{
private readonly SecretReplicationReconciler _reconciler;
private readonly ISecretsHubReader _hub;
private readonly SecretsGrpcHubClientOptions _options;
private readonly ILogger<GrpcSecretSyncService> _logger;
private readonly TimeProvider _timeProvider;
/// <summary>Creates the sync service.</summary>
/// <param name="local">The node's local store — the only thing this service writes to.</param>
/// <param name="hub">The central hub, read-only.</param>
/// <param name="cacheInvalidator">Resolver-cache seam, evicted for every applied row.</param>
/// <param name="options">Hub-client options.</param>
/// <param name="logger">Logger for sweep outcomes and failures.</param>
/// <param name="timeProvider">Clock, injectable so tests need not wait a real interval.</param>
public GrpcSecretSyncService(
ISecretStore local,
ISecretsHubReader hub,
ISecretCacheInvalidator? cacheInvalidator,
IOptions<SecretsGrpcHubClientOptions> options,
ILogger<GrpcSecretSyncService> logger,
TimeProvider? timeProvider = null)
{
ArgumentNullException.ThrowIfNull(options);
ArgumentNullException.ThrowIfNull(local);
_hub = hub ?? throw new ArgumentNullException(nameof(hub));
_options = options.Value;
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_timeProvider = timeProvider ?? TimeProvider.System;
_reconciler = new SecretReplicationReconciler(
local,
cacheInvalidator,
onRowFailed: (name, ex) => LogRowDiscarded(ex, name.Value));
}
/// <inheritdoc />
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
if (_options.SyncOnStartup)
{
await SweepSafelyAsync(stoppingToken).ConfigureAwait(false);
}
using PeriodicTimer timer = new(_options.SyncInterval, _timeProvider);
while (await timer.WaitForNextTickAsync(stoppingToken).ConfigureAwait(false))
{
await SweepSafelyAsync(stoppingToken).ConfigureAwait(false);
}
}
/// <summary>
/// Runs one pull-only reconcile against the hub.
/// </summary>
/// <param name="ct">A token to cancel the sweep.</param>
/// <returns>How many rows were pulled from the hub.</returns>
internal async Task<int> SweepAsync(CancellationToken ct)
{
IReadOnlyList<SecretManifestEntry> hubManifest =
await _hub.GetManifestAsync(ct).ConfigureAwait(false);
// The reconciler's pull path is exactly the required algorithm — diff the hub's manifest
// against the local one, fetch what the hub holds newer, apply last-writer-wins, evict the
// resolver cache per applied row — and it is documented as "a pull, never a push". Calling
// it rather than re-deriving the diff here also keeps the batching: a cold-starting node's
// pull set is central's ENTIRE inventory, and an unchunked GetSecrets would exceed gRPC's
// 4 MB default message cap and then fail identically on every interval forever.
return await _reconciler
.ReconcileAsync(hubManifest, (names, token) => _hub.GetManyAsync(names, token), ct)
.ConfigureAwait(false);
}
private async Task SweepSafelyAsync(CancellationToken ct)
{
try
{
int pulled = await SweepAsync(ct).ConfigureAwait(false);
if (pulled > 0)
{
LogSweepConverged(pulled);
}
}
catch (OperationCanceledException) when (ct.IsCancellationRequested)
{
// Host shutdown — not a failure.
}
catch (Exception ex)
{
// Deliberately catch-all. Everything reachable from here — an unreachable hub, a
// rejected credential, a deadline, a row the hub sent that this node's parse refuses —
// has the same correct response: keep serving the local store and try again. Letting any
// of it escape would fault the BackgroundService and take the host down over a transient
// central outage, which is precisely the availability the pull-only topology exists for.
LogSweepFailed(ex);
}
}
[LoggerMessage(
EventId = 1,
Level = LogLevel.Information,
Message = "Secret hub sync converged: pulled {Pulled} row(s) from the central hub.")]
private partial void LogSweepConverged(int pulled);
[LoggerMessage(
EventId = 2,
Level = LogLevel.Warning,
Message = "Secret hub sync failed; the node continues serving its local store and will retry on the next interval.")]
private partial void LogSweepFailed(Exception exception);
[LoggerMessage(
EventId = 3,
Level = LogLevel.Warning,
Message = "Discarding replicated secret row {SecretName} that could not be applied locally; the rest of the batch continues.")]
private partial void LogRowDiscarded(Exception exception, string secretName);
}
@@ -0,0 +1,217 @@
using Grpc.Core;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
using ZB.MOM.WW.Secrets.Replicator.Grpc.Wire;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc;
/// <summary>
/// The read half of the hub, as a follower sees it: compare inventories, then fetch rows in bulk.
/// </summary>
/// <remarks>
/// <para>
/// This is the whole of what a site node may do to central's secret store, and the interface says so
/// — there is no apply, no upsert, no delete. It mirrors the read half of the SQL-Server package's
/// <c>ISecretReplicationHub</c> without referencing it: the two topologies are deliberately separate
/// packages, and importing that interface would drag a SQL-Server dependency onto every site node
/// while also handing this one a write method it must never call.
/// </para>
/// <para>
/// It exists as a seam so the sweep is testable against an in-process fake instead of needing a live
/// gRPC server for every convergence case.
/// </para>
/// </remarks>
internal interface ISecretsHubReader
{
/// <summary>Returns the hub's manifest — names, revisions, timestamps, tombstone flags.</summary>
/// <param name="ct">A token to cancel the operation.</param>
/// <returns>The hub's manifest entries.</returns>
Task<IReadOnlyList<SecretManifestEntry>> GetManifestAsync(CancellationToken ct);
/// <summary>
/// Fetches several encrypted rows by name. Names absent from the hub are omitted, and so is any
/// row the follower cannot parse — an implementation returns the well-formed rows rather than
/// failing the batch.
/// </summary>
/// <param name="names">The names to fetch.</param>
/// <param name="ct">A token to cancel the operation.</param>
/// <returns>The matching encrypted rows.</returns>
Task<IReadOnlyList<StoredSecret>> GetManyAsync(IReadOnlyList<SecretName> names, CancellationToken ct);
}
/// <summary>
/// <see cref="ISecretsHubReader"/> over the generated <c>secrets_hub.v1</c> gRPC client: attaches the
/// bearer credential and a per-call deadline, and converts every response through
/// <see cref="WireToDomain"/>.
/// </summary>
/// <remarks>
/// <para>
/// <b>Transport faults are deliberately not caught.</b> An <see cref="RpcException"/> is the honest
/// signal that the hub did not answer, and the sweep — the only caller — is where that is turned
/// into "keep serving the last-known-good local store and retry next tick". Swallowing it here would
/// make an unreachable hub indistinguishable from an empty one, which is the one failure mode this
/// subsystem must never have.
/// </para>
/// <para>
/// <b>Parse faults are caught, per item.</b> That is not the same decision: the hub answered, and
/// the answer is mostly good. Failing the whole response over one unparseable element would stall
/// convergence permanently rather than transiently — the follower's pull set comes from the hub's
/// manifest, so the identical bad element would arrive in the identical batch on every interval and
/// nothing would ever be applied, while the log said only "sync failed" exactly as it does for an
/// outage. So each item is converted inside its own <c>try</c>, one warning names what was dropped
/// and why, and every well-formed sibling is returned. This is the same containment the Akka
/// replicator applies in <c>SecretReplicationActor.Materialize</c>.
/// </para>
/// <para>
/// A dropped item is dropped whole and never coerced — the fail-closed half of the same rule. Only
/// parse-shaped exceptions are caught (<see cref="ArgumentException"/>, <see cref="FormatException"/>);
/// anything else is a defect rather than bad input and is left to propagate.
/// </para>
/// </remarks>
internal sealed partial class GrpcSecretsHubClient : ISecretsHubReader
{
private const string AuthorizationHeader = "Authorization";
/// <summary>
/// Stands in for a name in a log line when the name itself is what failed to parse. The hub's
/// raw string is deliberately not echoed: it is the untrusted value under suspicion.
/// </summary>
private const string UnnameableItem = "(unparseable name)";
private readonly SecretsHub.SecretsHubClient _client;
private readonly SecretsGrpcHubClientOptions _options;
private readonly ILogger<GrpcSecretsHubClient> _logger;
private readonly TimeProvider _timeProvider;
/// <summary>Creates the hub client.</summary>
/// <param name="client">The generated gRPC client, bound to the configured channel.</param>
/// <param name="options">Endpoint, credential, and per-call deadline.</param>
/// <param name="logger">Logger for items the hub sent that this node could not parse.</param>
/// <param name="timeProvider">Clock used to compute the per-call deadline.</param>
public GrpcSecretsHubClient(
SecretsHub.SecretsHubClient client,
IOptions<SecretsGrpcHubClientOptions> options,
ILogger<GrpcSecretsHubClient> logger,
TimeProvider? timeProvider = null)
{
ArgumentNullException.ThrowIfNull(options);
_client = client ?? throw new ArgumentNullException(nameof(client));
_options = options.Value;
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_timeProvider = timeProvider ?? TimeProvider.System;
}
/// <inheritdoc />
public async Task<IReadOnlyList<SecretManifestEntry>> GetManifestAsync(CancellationToken ct)
{
GetManifestResponse response = await _client
.GetManifestAsync(new GetManifestRequest(), CreateCallOptions(ct))
.ConfigureAwait(false);
var entries = new List<SecretManifestEntry>(response.Entries.Count);
foreach (ManifestEntry wire in response.Entries)
{
try
{
entries.Add(WireToDomain.ToEntry(wire));
}
catch (Exception ex) when (IsParseFailure(ex))
{
// Dropping a manifest entry costs only that name's convergence: it is simply not in
// this sweep's pull set, and a corrected entry converges on the next one.
LogManifestEntryDiscarded(ex, Describe(wire.Name), Categorize(ex));
}
}
return entries;
}
/// <inheritdoc />
public async Task<IReadOnlyList<StoredSecret>> GetManyAsync(
IReadOnlyList<SecretName> names, CancellationToken ct)
{
ArgumentNullException.ThrowIfNull(names);
var request = new GetSecretsRequest();
foreach (SecretName name in names)
{
request.Names.Add(name.Value);
}
GetSecretsResponse response = await _client
.GetSecretsAsync(request, CreateCallOptions(ct))
.ConfigureAwait(false);
var rows = new List<StoredSecret>(response.Secrets.Count);
foreach (SecretRow wire in response.Secrets)
{
try
{
rows.Add(WireToDomain.ToRow(wire));
}
catch (Exception ex) when (IsParseFailure(ex))
{
// The reconciler treats a missing row exactly as it treats a name the hub no longer
// holds, so the batch applies its siblings and returns a smaller count.
LogRowDiscarded(ex, Describe(wire.Name), Categorize(ex));
}
}
return rows;
}
// Built per call rather than once: the deadline is an absolute instant, so a cached CallOptions
// would carry a deadline that expired shortly after startup and then fail every sweep forever.
private CallOptions CreateCallOptions(CancellationToken ct) => new(
headers: new Metadata { { AuthorizationHeader, $"Bearer {_options.BearerToken}" } },
deadline: _timeProvider.GetUtcNow().UtcDateTime.Add(_options.CallDeadline),
cancellationToken: ct);
// The exceptions WireToDomain raises for input the domain refuses: SecretName and the content
// type check throw ArgumentException, the round-trip timestamp parse throws FormatException.
// Narrow on purpose — a NullReferenceException or an OutOfMemoryException is a defect or a
// resource failure, and silently dropping rows over either would hide it behind a warning.
private static bool IsParseFailure(Exception exception) =>
exception is ArgumentException or FormatException;
// The name is the only field of an item that may reach a log sink, and only once the domain has
// accepted it. Nothing else is logged: a row is ciphertext, a wrapped DEK and two nonces, and a
// warning is not a place any of that belongs.
private static string Describe(string name)
{
try
{
return new SecretName(name).Value;
}
catch (ArgumentException)
{
return UnnameableItem;
}
}
// A category rather than a restatement of the exception, so an operator reading the warning
// knows which authored field to go and look at.
private static string Categorize(Exception exception) => exception switch
{
FormatException => "malformed timestamp",
_ => "invalid name or content type",
};
[LoggerMessage(
EventId = 1,
Level = LogLevel.Warning,
Message = "Discarding a malformed manifest entry for {SecretName} sent by the secrets hub ({Reason}); every other entry is reconciled normally.")]
private partial void LogManifestEntryDiscarded(Exception exception, string secretName, string reason);
[LoggerMessage(
EventId = 2,
Level = LogLevel.Warning,
Message = "Discarding a malformed secret row for {SecretName} sent by the secrets hub ({Reason}); every other row in the batch is applied normally.")]
private partial void LogRowDiscarded(Exception exception, string secretName, string reason);
}
@@ -0,0 +1,121 @@
namespace ZB.MOM.WW.Secrets.Replicator.Grpc;
/// <summary>
/// Configuration for a site node that follows the central-hosted secrets hub. Bound from a
/// configuration section by <c>AddZbSecretsGrpcHubClient</c>.
/// </summary>
/// <remarks>
/// <para>
/// Every field here describes how to <em>reach</em> the hub. There is deliberately no knob that
/// changes the direction of replication: this package is pull-only by construction and the wire
/// contract carries no write RPC, so a follower cannot be configured into pushing.
/// </para>
/// </remarks>
public sealed class SecretsGrpcHubClientOptions
{
/// <summary>
/// The hub's gRPC address, as an absolute <c>http</c> or <c>https</c> URI (for example
/// <c>https://central:5001</c>). Required.
/// </summary>
/// <remarks>
/// A plain <c>http</c> endpoint is accepted so an h2c-only or in-cluster deployment can be
/// stood up, but it sends <see cref="BearerToken"/> in cleartext on <em>every</em> call — anyone
/// on the path reads the hub credential and can then pull central's entire secret inventory.
/// Treat <c>http</c> as a development and loopback-only convenience; a site node reaching
/// central across a plant network must use <c>https</c>. This is documentation rather than a
/// rule the validator enforces, because "internal" is a property of a deployment's network and
/// cannot be decided from a URI string.
/// </remarks>
public string Endpoint { get; set; } = string.Empty;
/// <summary>
/// Shared bearer token presented on every call. Required — an unset token is a hard startup
/// failure rather than an anonymous call, because the hub authenticates on this alone.
/// </summary>
/// <remarks>
/// This value is never logged, never included in an exception message, and never echoed back by
/// validation: a startup log is read by far more people than the deployment secret store is.
/// Supply it the way the mesh PSKs are supplied — appsettings or environment — <b>not</b> as a
/// <c>${secret:}</c> reference, which would need the very store this client exists to fill.
/// </remarks>
public string BearerToken { get; set; } = string.Empty;
/// <summary>
/// How often the follower sweeps the hub for rows it is missing or behind on. Defaults to
/// 30 seconds. Must be positive.
/// </summary>
public TimeSpan SyncInterval { get; set; } = TimeSpan.FromSeconds(30);
/// <summary>
/// When <see langword="true"/> (the default), a sweep runs at startup before the first interval
/// elapses, so a node that was down while central wrote does not serve stale secrets for a whole
/// interval after it comes back.
/// </summary>
public bool SyncOnStartup { get; set; } = true;
/// <summary>
/// Deadline applied to each hub call. Defaults to 30 seconds — long enough for a busy central
/// node, short enough that an unreachable hub fails the sweep and is retried on the next tick
/// instead of pinning the sweep loop indefinitely.
/// </summary>
public TimeSpan CallDeadline { get; set; } = TimeSpan.FromSeconds(30);
/// <summary>
/// Throws if the options are unusable. Called by the DI extension at registration time so a
/// misconfigured node fails at startup rather than on the first silent sweep failure.
/// </summary>
/// <param name="sectionPath">
/// The configuration section the values were bound from, so each message names the key an
/// operator actually has to edit rather than the default one.
/// </param>
/// <exception cref="InvalidOperationException">
/// The endpoint is missing or is not an absolute http/https URI, the bearer token is missing, or
/// an interval is not positive.
/// </exception>
public void Validate(string sectionPath = DefaultSectionPath)
{
ArgumentException.ThrowIfNullOrWhiteSpace(sectionPath);
if (string.IsNullOrWhiteSpace(Endpoint))
{
throw new InvalidOperationException(
$"gRPC secrets hub client requires an Endpoint ({sectionPath}:Endpoint).");
}
if (!Uri.TryCreate(Endpoint, UriKind.Absolute, out Uri? uri) ||
(uri.Scheme != Uri.UriSchemeHttp && uri.Scheme != Uri.UriSchemeHttps))
{
// Rejected here rather than at GrpcChannel.ForAddress, which throws deep inside the
// first sweep — by which point the failure looks like a hub outage instead of a typo.
throw new InvalidOperationException(
$"gRPC secrets hub client Endpoint must be an absolute http or https URI " +
$"({sectionPath}:Endpoint, was '{Endpoint}').");
}
if (string.IsNullOrWhiteSpace(BearerToken))
{
// Fail closed. An empty token would otherwise be presented as `Bearer `, which the hub
// rejects on every call — an authentication outage that looks like a network problem.
throw new InvalidOperationException(
$"gRPC secrets hub client requires a BearerToken ({sectionPath}:BearerToken); " +
"it is unset, so this node has no way to authenticate to the hub.");
}
if (SyncInterval <= TimeSpan.Zero)
{
throw new InvalidOperationException(
$"gRPC secrets hub client SyncInterval must be positive " +
$"({sectionPath}:SyncInterval, was {SyncInterval}).");
}
if (CallDeadline <= TimeSpan.Zero)
{
throw new InvalidOperationException(
$"gRPC secrets hub client CallDeadline must be positive " +
$"({sectionPath}:CallDeadline, was {CallDeadline}).");
}
}
/// <summary>The configuration section these options are bound from unless a caller overrides it.</summary>
public const string DefaultSectionPath = "Secrets:GrpcHub";
}
@@ -0,0 +1,111 @@
using System.Globalization;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Wire;
/// <summary>
/// Rebuilds domain types from the <c>secrets_hub.v1</c> wire contract. This is the trust boundary a
/// follower applies to everything the hub sends it.
/// </summary>
/// <remarks>
/// <para>
/// Parsing here is <b>strict and one item at a time</b>: a value protobuf accepted but the domain
/// would not — a name that is rooted or path-traversing, a content type naming no enum member, a
/// timestamp that is not round-trip ISO-8601 — throws rather than being coerced.
/// </para>
/// <para>
/// There is deliberately <b>no batch entry point here</b>, and that absence is the design. A method
/// converting a whole response would fail the whole response on one bad element, and because a
/// follower's pull set is derived from the hub's manifest, the identical bad element would re-fail
/// the identical sweep on every interval forever — a permanent stall that reads in the log exactly
/// like a hub outage. Isolation therefore lives one layer up, in
/// <c>GrpcSecretsHubClient</c>, which converts each item inside its own <c>try</c>, logs one warning
/// naming the item, drops it, and returns every well-formed sibling.
/// </para>
/// <para>
/// That split mirrors the Akka replicator exactly — <c>SecretRowDto.ToStoredSecret</c> throws and
/// <c>SecretReplicationActor.Materialize</c> catches per row — so the two transports share one
/// fail-closed parse shape and one containment rule, and cannot disagree about what a replicated row
/// is allowed to contain.
/// </para>
/// <para>
/// Two checks the Akka DTO makes are <em>absent</em> here on purpose. Protobuf cannot express a null
/// <c>bytes</c> or a null <c>string</c> — an omitted field decodes to empty, never null — so the
/// null-blob guards have nothing to catch. Emptiness itself is deliberately not judged: an empty
/// <see cref="StoredSecret.Ciphertext"/> is legitimate (AES-GCM ciphertext is the length of its
/// plaintext, so a secret whose value is the empty string has exactly that), and rejecting it here
/// would refuse a valid row. A structurally nonsensical row fails closed one layer down, at decrypt.
/// </para>
/// </remarks>
internal static class WireToDomain
{
/// <summary>Rebuilds one manifest entry from the wire form.</summary>
/// <param name="entry">The wire manifest entry.</param>
/// <returns>The domain manifest entry.</returns>
/// <exception cref="ArgumentException">The name is not a valid secret name.</exception>
/// <exception cref="FormatException">The timestamp is not a round-trip ISO-8601 value.</exception>
public static SecretManifestEntry ToEntry(ManifestEntry entry)
{
ArgumentNullException.ThrowIfNull(entry);
return new SecretManifestEntry
{
// SecretName re-validates on construction, so a malformed or path-traversing name from
// the hub is rejected here rather than reaching the store.
Name = new SecretName(entry.Name),
Revision = entry.Revision,
UpdatedUtc = ParseTimestamp(entry.UpdatedUtc),
IsDeleted = entry.IsDeleted,
};
}
/// <summary>Rebuilds one encrypted row from the wire form.</summary>
/// <param name="row">The wire row.</param>
/// <returns>The domain row.</returns>
/// <exception cref="ArgumentException">The name or content type is not valid.</exception>
/// <exception cref="FormatException">A timestamp is not a round-trip ISO-8601 value.</exception>
public static StoredSecret ToRow(SecretRow row)
{
ArgumentNullException.ThrowIfNull(row);
return new StoredSecret
{
Name = new SecretName(row.Name),
// Explicit presence, not `?? null`: proto3 optional is what keeps a description that was
// deliberately set to the empty string distinguishable from one that was never set.
Description = row.HasDescription ? row.Description : null,
ContentType = ParseContentType(row.ContentType),
Ciphertext = row.Ciphertext.ToByteArray(),
Nonce = row.Nonce.ToByteArray(),
Tag = row.Tag.ToByteArray(),
WrappedDek = row.WrappedDek.ToByteArray(),
WrapNonce = row.WrapNonce.ToByteArray(),
WrapTag = row.WrapTag.ToByteArray(),
KekId = row.KekId,
Revision = row.Revision,
IsDeleted = row.IsDeleted,
DeletedUtc = row.HasDeletedUtc ? ParseTimestamp(row.DeletedUtc) : null,
CreatedUtc = ParseTimestamp(row.CreatedUtc),
UpdatedUtc = ParseTimestamp(row.UpdatedUtc),
CreatedBy = row.HasCreatedBy ? row.CreatedBy : null,
UpdatedBy = row.HasUpdatedBy ? row.UpdatedBy : null,
};
}
// RoundtripKind, so an offset-bearing "O" string comes back with its offset intact. The hub and
// the follower compare UpdatedUtc for last-writer-wins, so "close enough" is not enough: a value
// that shifted by a tick or lost its offset would make a converged pair look permanently unequal.
private static DateTimeOffset ParseTimestamp(string value) => DateTimeOffset.Parse(
value, CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind);
// Enum.Parse is wrong for untrusted input on two counts: a numeric string that overflows the
// underlying type throws OverflowException where callers expect ArgumentException, and any
// in-range number is accepted even if it names no member — persisting an undefined enum value
// that later readers assume is valid.
private static SecretContentType ParseContentType(string value) =>
Enum.TryParse(value, out SecretContentType parsed) && Enum.IsDefined(parsed)
? parsed
: throw new ArgumentException(
$"Replicated secret row has an unrecognized content type '{value}'.", nameof(value));
}
@@ -0,0 +1,551 @@
using System.Diagnostics;
using System.Reflection;
using Grpc.Net.Client;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.DependencyInjection;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
using ZB.MOM.WW.Secrets.Sqlite;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Tests;
/// <summary>
/// Convergence behaviour of the follower's pull-only sweep, exercised against real SQLite stores on
/// both sides so the assertions are about actual persisted state rather than mock interactions.
/// </summary>
public sealed class GrpcSecretSyncServiceTests : IDisposable
{
private readonly List<string> _dbPaths = [];
private readonly SqliteSecretStore _local;
private readonly SqliteSecretStore _hubStore;
private readonly FakeHubReader _hub;
private readonly RecordingLogger<GrpcSecretSyncService> _logger = new();
private readonly RecordingLogger<GrpcSecretsHubClient> _clientLogger = new();
private readonly RecordingCacheInvalidator _cache = new();
public GrpcSecretSyncServiceTests()
{
_local = CreateStore();
_hubStore = CreateStore();
_hub = new FakeHubReader(_hubStore);
}
private SqliteSecretStore CreateStore()
{
string path = Path.Combine(Path.GetTempPath(), $"zb-grpc-sync-{Guid.NewGuid():N}.db");
_dbPaths.Add(path);
var factory = new SecretsSqliteConnectionFactory(path);
new SqliteSecretsStoreMigrator(factory).MigrateAsync(CancellationToken.None).GetAwaiter().GetResult();
return new SqliteSecretStore(factory);
}
private GrpcSecretSyncService CreateService(TimeSpan? interval = null) => new(
_local,
_hub,
_cache,
Options.Create(new SecretsGrpcHubClientOptions
{
Endpoint = "https://central:5001",
BearerToken = "unused-by-the-fake",
SyncInterval = interval ?? TimeSpan.FromHours(1),
}),
_logger);
private static StoredSecret Row(string name, byte marker) => new()
{
Name = new SecretName(name),
ContentType = SecretContentType.Text,
Ciphertext = [marker],
Nonce = [1],
Tag = [2],
WrappedDek = [3],
WrapNonce = [4],
WrapTag = [5],
KekId = "sha256:test",
Revision = 0,
CreatedUtc = DateTimeOffset.UtcNow,
UpdatedUtc = DateTimeOffset.UtcNow,
};
[Fact]
public async Task Sweep_pulls_a_secret_the_node_has_never_seen()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
int pulled = await CreateService().SweepAsync(CancellationToken.None);
Assert.Equal(1, pulled);
StoredSecret? local = await _local.GetAsync(new SecretName("db/password"), CancellationToken.None);
Assert.NotNull(local);
Assert.Equal(0xAA, local!.Ciphertext[0]);
}
[Fact]
public async Task Sweep_pulls_the_row_byte_identically()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
await _hubStore.UpsertAsync(Row("db/password", 0xBB), CancellationToken.None);
StoredSecret hubRow = (await _hubStore.GetAsync(new SecretName("db/password"), CancellationToken.None))!;
await CreateService().SweepAsync(CancellationToken.None);
StoredSecret localRow = (await _local.GetAsync(new SecretName("db/password"), CancellationToken.None))!;
Assert.Equal(hubRow.Ciphertext, localRow.Ciphertext);
Assert.Equal(hubRow.WrappedDek, localRow.WrappedDek);
Assert.Equal(hubRow.KekId, localRow.KekId);
Assert.Equal(hubRow.Revision, localRow.Revision);
Assert.Equal(hubRow.UpdatedUtc, localRow.UpdatedUtc);
}
[Fact]
public async Task Sweep_applies_a_hub_tombstone_over_a_live_local_row()
{
await _hubStore.UpsertAsync(Row("api/key", 0xBB), CancellationToken.None);
await CreateService().SweepAsync(CancellationToken.None);
await _hubStore.DeleteAsync(new SecretName("api/key"), "admin", CancellationToken.None);
int pulled = await CreateService().SweepAsync(CancellationToken.None);
Assert.Equal(1, pulled);
StoredSecret localRow = (await _local.GetAsync(new SecretName("api/key"), CancellationToken.None))!;
Assert.True(localRow.IsDeleted);
}
[Fact]
public async Task Sweep_is_idempotent_so_a_converged_follower_stays_quiet()
{
await _hubStore.UpsertAsync(Row("api/key", 0xBB), CancellationToken.None);
GrpcSecretSyncService service = CreateService();
await service.SweepAsync(CancellationToken.None);
int pulled = await service.SweepAsync(CancellationToken.None);
Assert.Equal(0, pulled);
}
[Fact]
public async Task Sweep_skips_the_fetch_when_the_hub_has_nothing_newer()
{
await CreateService().SweepAsync(CancellationToken.None);
Assert.Equal(0, _hub.GetManyCallCount);
}
[Fact]
public async Task Sweep_never_sends_a_local_only_secret_hub_ward()
{
// Pull-only: a row this node holds and the hub does not stays put. In the SQL-Server
// topology this would be pushed; here central is the sole origin of every update, and the
// contract has no write RPC to push it with.
await _local.UpsertAsync(Row("only/local", 0x11), CancellationToken.None);
int pulled = await CreateService().SweepAsync(CancellationToken.None);
Assert.Equal(0, pulled);
Assert.Empty(await _hubStore.GetManifestAsync(CancellationToken.None));
}
[Fact]
public void The_hub_reader_seam_exposes_no_write_operation()
{
// The structural half of pull-only. The proto has no write RPC; this pins that the client's
// own seam cannot grow one either, so a future edit has to break this test on purpose.
string[] members = typeof(ISecretsHubReader)
.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly)
.Select(m => m.Name)
.Order(StringComparer.Ordinal)
.ToArray();
Assert.Equal(["GetManifestAsync", "GetManyAsync"], members);
}
[Theory]
[InlineData("ComputePushSet")]
[InlineData("ReadLocalAsync")]
[InlineData("ApplyReplicatedAsync")]
public void The_client_package_never_names_a_hub_ward_write_path(string forbidden)
{
// ComputePushSet and ReadLocalAsync are the two reconciler entry points that assemble rows
// to move toward a peer; ApplyReplicatedAsync on a hub-side store is how they would land.
// Pull-only is an owner-confirmed invariant, so the guard is a source scan rather than a
// behavioural test: a future edit has to delete this test on purpose to reintroduce a push.
foreach (string file in ClientSourceFiles())
{
string source = File.ReadAllText(file);
Assert.DoesNotContain(
forbidden,
StripComments(source),
StringComparison.Ordinal);
}
}
// The client half of the package — deliberately excludes the server-side files, which legitimately
// read a local store to serve the hub.
private static IEnumerable<string> ClientSourceFiles()
{
string root = PackageSourceRoot();
string[] files =
[
Path.Combine(root, "GrpcSecretSyncService.cs"),
Path.Combine(root, "GrpcSecretsHubClient.cs"),
Path.Combine(root, "Wire", "WireToDomain.cs"),
Path.Combine(root, "DependencyInjection", "SecretsGrpcHubClientExtensions.cs"),
];
foreach (string file in files)
{
Assert.True(File.Exists(file), $"expected client source file is missing: {file}");
}
return files;
}
private static string PackageSourceRoot()
{
DirectoryInfo? dir = new(AppContext.BaseDirectory);
while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "ZB.MOM.WW.Secrets.slnx")))
{
dir = dir.Parent;
}
Assert.NotNull(dir);
return Path.Combine(dir!.FullName, "src", "ZB.MOM.WW.Secrets.Replicator.Grpc");
}
// Comments explain what the code deliberately does NOT do, and naming the forbidden member is
// exactly how that is explained — so the scan looks at code only.
private static string StripComments(string source)
{
IEnumerable<string> lines = source
.Split('\n')
.Select(line => line.TrimStart())
.Where(line => !line.StartsWith("//", StringComparison.Ordinal)
&& !line.StartsWith("///", StringComparison.Ordinal)
&& !line.StartsWith('*'));
return string.Join('\n', lines);
}
[Fact]
public async Task Sweep_evicts_the_resolver_cache_for_applied_names_only()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
await _local.UpsertAsync(Row("only/local", 0x11), CancellationToken.None);
await CreateService().SweepAsync(CancellationToken.None);
Assert.Equal(["db/password"], _cache.Invalidated.Select(n => n.Value));
}
[Fact]
public async Task A_hub_outage_on_the_manifest_call_propagates_out_of_the_raw_sweep()
{
// Establishes that the fake really fails, so the next two tests prove containment rather
// than an accidentally-healthy hub.
_hub.FailManifestWith = () => new InvalidOperationException("hub unreachable");
await Assert.ThrowsAsync<InvalidOperationException>(
() => CreateService().SweepAsync(CancellationToken.None));
}
[Fact]
public async Task A_hub_outage_on_the_manifest_call_never_escapes_the_background_loop()
{
await _local.UpsertAsync(Row("api/key", 0xBB), CancellationToken.None);
StoredSecret before = (await _local.GetAsync(new SecretName("api/key"), CancellationToken.None))!;
_hub.FailManifestWith = () => new InvalidOperationException("hub unreachable");
await RunOneStartupSweepAsync(() => _hub.ManifestCallCount > 0);
StoredSecret after = (await _local.GetAsync(new SecretName("api/key"), CancellationToken.None))!;
Assert.Equal(before.Ciphertext, after.Ciphertext);
Assert.Equal(before.Revision, after.Revision);
Assert.Equal(before.UpdatedUtc, after.UpdatedUtc);
Assert.False(after.IsDeleted);
Assert.Equal(1, _logger.WarningCount);
}
[Fact]
public async Task A_hub_outage_on_the_fetch_call_never_escapes_the_background_loop()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
_hub.FailFetchWith = () => new InvalidOperationException("hub unreachable mid-fetch");
await RunOneStartupSweepAsync(() => _hub.GetManyCallCount > 0);
Assert.Null(await _local.GetAsync(new SecretName("db/password"), CancellationToken.None));
Assert.Equal(1, _logger.WarningCount);
}
[Fact]
public async Task A_quiet_sweep_logs_nothing_at_information()
{
await RunOneStartupSweepAsync(() => _hub.ManifestCallCount > 0);
Assert.Equal(0, _logger.InformationCount);
Assert.Equal(0, _logger.WarningCount);
}
[Fact]
public async Task A_sweep_that_moved_rows_reports_how_many_it_pulled()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
await RunOneStartupSweepAsync(() => _hub.GetManyCallCount > 0);
Assert.Equal(1, _logger.InformationCount);
}
[Fact]
public async Task Startup_sync_can_be_switched_off()
{
await _hubStore.UpsertAsync(Row("db/password", 0xAA), CancellationToken.None);
var service = new GrpcSecretSyncService(
_local,
_hub,
_cache,
Options.Create(new SecretsGrpcHubClientOptions
{
Endpoint = "https://central:5001",
BearerToken = "unused-by-the-fake",
SyncInterval = TimeSpan.FromHours(1),
SyncOnStartup = false,
}),
_logger);
await service.StartAsync(CancellationToken.None);
await service.StopAsync(CancellationToken.None);
Assert.Equal(0, _hub.ManifestCallCount);
}
[Fact]
public async Task A_malformed_row_never_poisons_the_batch_it_arrived_in()
{
// The failure this guards against is not "one row is lost" — it is that the pull set never
// changes, so the identical malformed row re-fails the identical sweep every interval and
// the node never converges on anything, indistinguishable in the log from a hub outage.
SecretRow bad = TestWire.Row("api/key", 0xBB);
bad.ContentType = "Kerberos";
var invoker = new FakeSecretsHubCallInvoker
{
ManifestResponse = new GetManifestResponse
{
Entries =
{
TestWire.Entry("db/password"), TestWire.Entry("api/key"), TestWire.Entry("svc/token"),
},
},
SecretsResponse = new GetSecretsResponse
{
Secrets = { TestWire.Row("db/password", 0xAA), bad, TestWire.Row("svc/token", 0xCC) },
},
};
int pulled = await CreateServiceOverTheWire(invoker).SweepAsync(CancellationToken.None);
Assert.Equal(2, pulled);
Assert.NotNull(await _local.GetAsync(new SecretName("db/password"), CancellationToken.None));
Assert.NotNull(await _local.GetAsync(new SecretName("svc/token"), CancellationToken.None));
Assert.Null(await _local.GetAsync(new SecretName("api/key"), CancellationToken.None));
Assert.Single(_clientLogger.Warnings);
}
[Fact]
public async Task A_malformed_manifest_entry_never_poisons_the_manifest_it_arrived_in()
{
ManifestEntry bad = TestWire.Entry("api/key");
bad.UpdatedUtc = "not-a-timestamp";
var invoker = new FakeSecretsHubCallInvoker
{
ManifestResponse = new GetManifestResponse
{
Entries = { TestWire.Entry("db/password"), bad, TestWire.Entry("svc/token") },
},
SecretsResponse = new GetSecretsResponse
{
Secrets = { TestWire.Row("db/password", 0xAA), TestWire.Row("svc/token", 0xCC) },
},
};
int pulled = await CreateServiceOverTheWire(invoker).SweepAsync(CancellationToken.None);
Assert.Equal(2, pulled);
Assert.Equal(["db/password", "svc/token"], invoker.LastSecretsRequest!.Names);
Assert.Single(_clientLogger.Warnings);
}
// A sweep wired to the REAL hub client over a fake CallInvoker, so the parse boundary the other
// tests bypass (the FakeHubReader hands over domain types already) is actually exercised.
private GrpcSecretSyncService CreateServiceOverTheWire(FakeSecretsHubCallInvoker invoker)
{
IOptions<SecretsGrpcHubClientOptions> options = Options.Create(new SecretsGrpcHubClientOptions
{
Endpoint = "https://central:5001",
BearerToken = "hub-token",
SyncInterval = TimeSpan.FromHours(1),
});
var client = new GrpcSecretsHubClient(
new SecretsHub.SecretsHubClient(invoker), options, _clientLogger);
return new GrpcSecretSyncService(_local, client, _cache, options, _logger);
}
[Fact]
public void Registration_refuses_a_configuration_with_no_bearer_token()
{
IConfiguration config = new ConfigurationBuilder()
.AddInMemoryCollection(new Dictionary<string, string?>
{
["Secrets:GrpcHub:Endpoint"] = "https://central:5001",
})
.Build();
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(
() => new ServiceCollection().AddZbSecretsGrpcHubClient(config));
Assert.Contains("Secrets:GrpcHub:BearerToken", ex.Message, StringComparison.Ordinal);
}
[Fact]
public void Registration_does_not_hijack_an_application_s_own_grpc_channel()
{
// GrpcChannel is a framework type, so an application that already has one registered for its
// own dependency must keep it — and this package must still dial the hub, not that endpoint.
IConfiguration config = new ConfigurationBuilder()
.AddInMemoryCollection(new Dictionary<string, string?>
{
["Secrets:GrpcHub:Endpoint"] = "https://central:5001",
["Secrets:GrpcHub:BearerToken"] = "token",
})
.Build();
using GrpcChannel applicationChannel = GrpcChannel.ForAddress("https://somewhere-else:9999");
ServiceCollection services = new();
services.AddSingleton(applicationChannel);
services.AddZbSecretsGrpcHubClient(config);
using ServiceProvider provider = services.BuildServiceProvider();
Assert.Same(applicationChannel, provider.GetRequiredService<GrpcChannel>());
Assert.NotSame(
applicationChannel,
provider.GetRequiredKeyedService<GrpcChannel>(
SecretsGrpcHubClientExtensions.ChannelServiceKey));
}
// Runs the hosted service through one startup sweep and shuts it down, asserting that nothing
// escaped ExecuteAsync. The long sync interval means exactly one sweep happens.
private async Task RunOneStartupSweepAsync(Func<bool> sweepObserved)
{
GrpcSecretSyncService service = CreateService();
await service.StartAsync(CancellationToken.None);
var deadline = Stopwatch.StartNew();
while (!sweepObserved() && deadline.Elapsed < TimeSpan.FromSeconds(10))
{
await Task.Delay(10);
}
await service.StopAsync(CancellationToken.None);
Assert.True(sweepObserved(), "the startup sweep never ran");
Assert.NotNull(service.ExecuteTask);
Assert.False(service.ExecuteTask!.IsFaulted);
}
public void Dispose()
{
Microsoft.Data.Sqlite.SqliteConnection.ClearAllPools();
foreach (string db in _dbPaths)
{
foreach (string path in new[] { db, db + "-wal", db + "-shm" })
{
if (File.Exists(path))
{
File.Delete(path);
}
}
}
}
/// <summary>
/// An <see cref="ISecretsHubReader"/> backed by a real SQLite store, standing in for the
/// central-hosted hub. Backed by a real store rather than a dictionary for the same reason the
/// SQL-Server suite is: the behaviour under test is last-writer-wins convergence, and a
/// hand-rolled fake would re-implement the very logic the tests exist to check.
/// </summary>
private sealed class FakeHubReader(SqliteSecretStore store) : ISecretsHubReader
{
public int ManifestCallCount { get; private set; }
public int GetManyCallCount { get; private set; }
public Func<Exception>? FailManifestWith { get; set; }
public Func<Exception>? FailFetchWith { get; set; }
public Task<IReadOnlyList<SecretManifestEntry>> GetManifestAsync(CancellationToken ct)
{
ManifestCallCount++;
return FailManifestWith is null
? store.GetManifestAsync(ct)
: Task.FromException<IReadOnlyList<SecretManifestEntry>>(FailManifestWith());
}
public async Task<IReadOnlyList<StoredSecret>> GetManyAsync(
IReadOnlyList<SecretName> names, CancellationToken ct)
{
GetManyCallCount++;
if (FailFetchWith is not null)
{
throw FailFetchWith();
}
var rows = new List<StoredSecret>(names.Count);
foreach (SecretName name in names)
{
StoredSecret? row = await store.GetAsync(name, ct);
if (row is not null)
{
rows.Add(row);
}
}
return rows;
}
}
private sealed class RecordingCacheInvalidator : ISecretCacheInvalidator
{
public List<SecretName> Invalidated { get; } = [];
public void Invalidate(SecretName name) => Invalidated.Add(name);
}
}
@@ -0,0 +1,233 @@
using Microsoft.Extensions.Options;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Tests;
/// <summary>
/// The real hub client, driven over a fake <c>CallInvoker</c>: what it puts on the wire (credential
/// and deadline) and what it does with what comes back (per-item conversion, per-item isolation).
/// </summary>
/// <remarks>
/// Everything here is deliberately exercised through <c>GrpcSecretsHubClient</c> itself rather than
/// through a fake of the <c>ISecretsHubReader</c> seam. A seam fake proves nothing about the header,
/// the deadline, or the conversion — all three live only in this class, and all three are exactly
/// where a follower silently talks to the hub wrong.
/// </remarks>
public sealed class GrpcSecretsHubClientTests
{
private static readonly DateTimeOffset Now = new(2026, 8, 7, 12, 0, 0, TimeSpan.Zero);
private readonly FakeSecretsHubCallInvoker _invoker = new();
private readonly RecordingLogger<GrpcSecretsHubClient> _logger = new();
private readonly SecretsGrpcHubClientOptions _options = new()
{
Endpoint = "https://central:5001",
BearerToken = "hub-token",
CallDeadline = TimeSpan.FromSeconds(17),
};
private GrpcSecretsHubClient CreateClient() => new(
new SecretsHub.SecretsHubClient(_invoker),
Options.Create(_options),
_logger,
new FixedTimeProvider(Now));
[Fact]
public async Task Every_call_presents_the_bearer_credential()
{
_invoker.ManifestResponse = new GetManifestResponse { Entries = { TestWire.Entry("db/password") } };
_invoker.SecretsResponse = new GetSecretsResponse { Secrets = { TestWire.Row("db/password", 0xAA) } };
GrpcSecretsHubClient client = CreateClient();
await client.GetManifestAsync(CancellationToken.None);
await client.GetManyAsync([new SecretName("db/password")], CancellationToken.None);
Assert.Equal(["GetManifest", "GetSecrets"], _invoker.Methods);
Assert.Equal("Bearer hub-token", _invoker.AuthorizationOn(0));
Assert.Equal("Bearer hub-token", _invoker.AuthorizationOn(1));
}
[Fact]
public async Task Every_call_carries_a_deadline_of_now_plus_the_configured_budget()
{
await CreateClient().GetManifestAsync(CancellationToken.None);
Assert.Equal(Now.UtcDateTime.AddSeconds(17), _invoker.Calls[0].Deadline);
}
[Fact]
public async Task The_deadline_is_recomputed_per_call_rather_than_cached()
{
// A CallOptions built once at construction would carry an absolute deadline that expires
// shortly after startup and then fails every sweep forever, which reads as a hub outage.
GrpcSecretsHubClient client = CreateClient();
await client.GetManifestAsync(CancellationToken.None);
await client.GetManifestAsync(CancellationToken.None);
Assert.Equal(_invoker.Calls[0].Deadline, _invoker.Calls[1].Deadline);
Assert.NotSame(_invoker.Calls[0].Headers, _invoker.Calls[1].Headers);
}
[Fact]
public async Task The_fetch_asks_for_exactly_the_names_it_was_given()
{
_invoker.SecretsResponse = new GetSecretsResponse();
await CreateClient().GetManyAsync(
[new SecretName("db/password"), new SecretName("api/key")], CancellationToken.None);
Assert.Equal(["db/password", "api/key"], _invoker.LastSecretsRequest!.Names);
}
[Fact]
public async Task A_wire_row_comes_back_as_a_domain_row()
{
_invoker.SecretsResponse = new GetSecretsResponse { Secrets = { TestWire.Row("db/password", 0xAA) } };
IReadOnlyList<StoredSecret> rows =
await CreateClient().GetManyAsync([new SecretName("db/password")], CancellationToken.None);
StoredSecret row = Assert.Single(rows);
Assert.Equal("db/password", row.Name.Value);
Assert.Equal(SecretContentType.Text, row.ContentType);
Assert.Equal(new byte[] { 0xAA }, row.Ciphertext);
Assert.Equal(TestWire.FixedInstant, row.UpdatedUtc);
}
[Fact]
public async Task A_wire_manifest_entry_comes_back_as_a_domain_entry()
{
_invoker.ManifestResponse = new GetManifestResponse { Entries = { TestWire.Entry("api/key") } };
IReadOnlyList<SecretManifestEntry> entries =
await CreateClient().GetManifestAsync(CancellationToken.None);
SecretManifestEntry entry = Assert.Single(entries);
Assert.Equal("api/key", entry.Name.Value);
Assert.Equal(TestWire.FixedInstant, entry.UpdatedUtc);
}
[Fact]
public async Task A_malformed_row_is_dropped_and_its_well_formed_siblings_survive()
{
// The whole point: one unparseable row must not cost the batch. Eagerly materializing the
// response would fail all three, and the identical pull set would re-fail every interval.
SecretRow bad = TestWire.Row("api/key", 0xBB);
bad.ContentType = "Kerberos";
_invoker.SecretsResponse = new GetSecretsResponse
{
Secrets = { TestWire.Row("db/password", 0xAA), bad, TestWire.Row("svc/token", 0xCC) },
};
IReadOnlyList<StoredSecret> rows = await CreateClient().GetManyAsync(
[new SecretName("db/password"), new SecretName("api/key"), new SecretName("svc/token")],
CancellationToken.None);
Assert.Equal(["db/password", "svc/token"], rows.Select(r => r.Name.Value));
}
[Fact]
public async Task A_dropped_row_costs_exactly_one_warning_that_names_it()
{
SecretRow bad = TestWire.Row("api/key", 0xBB);
bad.ContentType = "Kerberos";
_invoker.SecretsResponse = new GetSecretsResponse
{
Secrets = { TestWire.Row("db/password", 0xAA), bad },
};
await CreateClient().GetManyAsync(
[new SecretName("db/password"), new SecretName("api/key")], CancellationToken.None);
string warning = Assert.Single(_logger.Warnings);
Assert.Contains("api/key", warning, StringComparison.Ordinal);
}
[Fact]
public async Task A_dropped_row_never_logs_the_material_it_was_carrying()
{
// A parse failure is an operations problem, so it is logged — but a replicated row is
// ciphertext plus its wrapped DEK, and none of that may reach a log sink.
SecretRow bad = TestWire.Row("api/key", 0xBB);
bad.UpdatedUtc = "yesterday";
_invoker.SecretsResponse = new GetSecretsResponse { Secrets = { bad } };
await CreateClient().GetManyAsync([new SecretName("api/key")], CancellationToken.None);
string warning = Assert.Single(_logger.Warnings);
foreach (string forbidden in new[] { "sha256:test", "hub-token", "Ciphertext", "WrappedDek" })
{
Assert.DoesNotContain(forbidden, warning, StringComparison.OrdinalIgnoreCase);
}
}
[Fact]
public async Task A_row_whose_own_name_is_unparseable_is_dropped_without_echoing_it()
{
// The name is the one field a warning may legitimately carry — but here the name IS what
// failed to parse, so it is replaced by a marker rather than trusted into the log line.
SecretRow bad = TestWire.Row("db/password", 0xAA);
bad.Name = "../../etc/passwd";
_invoker.SecretsResponse = new GetSecretsResponse { Secrets = { bad } };
IReadOnlyList<StoredSecret> rows =
await CreateClient().GetManyAsync([new SecretName("db/password")], CancellationToken.None);
Assert.Empty(rows);
string warning = Assert.Single(_logger.Warnings);
Assert.DoesNotContain("etc/passwd", warning, StringComparison.Ordinal);
}
[Fact]
public async Task A_malformed_manifest_entry_is_dropped_and_the_rest_of_the_manifest_survives()
{
ManifestEntry bad = TestWire.Entry("api/key");
bad.UpdatedUtc = "not-a-timestamp";
_invoker.ManifestResponse = new GetManifestResponse
{
Entries = { TestWire.Entry("db/password"), bad, TestWire.Entry("svc/token") },
};
IReadOnlyList<SecretManifestEntry> entries =
await CreateClient().GetManifestAsync(CancellationToken.None);
Assert.Equal(["db/password", "svc/token"], entries.Select(e => e.Name.Value));
Assert.Single(_logger.Warnings);
}
[Fact]
public async Task Conversion_preserves_the_order_the_hub_sent()
{
_invoker.SecretsResponse = new GetSecretsResponse
{
Secrets = { TestWire.Row("db/password", 0xAA), TestWire.Row("api/key", 0xBB) },
};
IReadOnlyList<StoredSecret> rows = await CreateClient().GetManyAsync(
[new SecretName("db/password"), new SecretName("api/key")], CancellationToken.None);
Assert.Equal(["db/password", "api/key"], rows.Select(r => r.Name.Value));
}
[Fact]
public async Task A_well_formed_response_logs_nothing()
{
_invoker.ManifestResponse = new GetManifestResponse { Entries = { TestWire.Entry("db/password") } };
await CreateClient().GetManifestAsync(CancellationToken.None);
Assert.Empty(_logger.Warnings);
Assert.Empty(_logger.Information);
}
}
@@ -0,0 +1,132 @@
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Tests;
/// <summary>
/// Fail-closed validation of the follower's hub-client options. Every message must name the exact
/// configuration key an operator has to fix, and none of them may ever echo the bearer token.
/// </summary>
public sealed class SecretsGrpcHubClientOptionsTests
{
private const string Token = "s3cr3t-hub-token";
private static SecretsGrpcHubClientOptions Valid() => new()
{
Endpoint = "https://central:5001",
BearerToken = Token,
};
[Fact]
public void Defaults_match_the_documented_contract()
{
var options = new SecretsGrpcHubClientOptions();
Assert.Equal(TimeSpan.FromSeconds(30), options.SyncInterval);
Assert.Equal(TimeSpan.FromSeconds(30), options.CallDeadline);
Assert.True(options.SyncOnStartup);
}
[Fact]
public void A_complete_configuration_validates()
{
Valid().Validate();
}
[Theory]
[InlineData("")]
[InlineData(" ")]
public void A_missing_endpoint_names_its_key(string endpoint)
{
SecretsGrpcHubClientOptions options = Valid();
options.Endpoint = endpoint;
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.Contains("Secrets:GrpcHub:Endpoint", ex.Message, StringComparison.Ordinal);
}
[Theory]
[InlineData("central:5001")]
[InlineData("/relative/path")]
[InlineData("ftp://central:5001")]
[InlineData("unix:///var/run/hub.sock")]
public void An_endpoint_that_is_not_an_absolute_http_uri_names_its_key(string endpoint)
{
SecretsGrpcHubClientOptions options = Valid();
options.Endpoint = endpoint;
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.Contains("Secrets:GrpcHub:Endpoint", ex.Message, StringComparison.Ordinal);
}
[Theory]
[InlineData("")]
[InlineData(" ")]
public void A_missing_bearer_token_names_its_key(string token)
{
SecretsGrpcHubClientOptions options = Valid();
options.BearerToken = token;
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.Contains("Secrets:GrpcHub:BearerToken", ex.Message, StringComparison.Ordinal);
}
public static TheoryData<Action<SecretsGrpcHubClientOptions>> InvalidMutations() =>
[
o => o.Endpoint = string.Empty,
o => o.Endpoint = "not a uri",
o => o.BearerToken = string.Empty,
o => o.SyncInterval = TimeSpan.Zero,
o => o.CallDeadline = TimeSpan.FromSeconds(-1),
];
[Theory]
[MemberData(nameof(InvalidMutations))]
public void No_validation_message_ever_echoes_the_bearer_token(
Action<SecretsGrpcHubClientOptions> makeInvalid)
{
// A configuration error surfaces in logs and crash dumps. Naming the key is the whole job;
// quoting the value would leak the hub credential to everyone who can read a startup log.
SecretsGrpcHubClientOptions options = Valid();
makeInvalid(options);
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.DoesNotContain(Token, ex.Message, StringComparison.Ordinal);
}
[Theory]
[InlineData(0)]
[InlineData(-1)]
public void A_non_positive_sync_interval_names_its_key(int seconds)
{
SecretsGrpcHubClientOptions options = Valid();
options.SyncInterval = TimeSpan.FromSeconds(seconds);
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.Contains("Secrets:GrpcHub:SyncInterval", ex.Message, StringComparison.Ordinal);
}
[Theory]
[InlineData(0)]
[InlineData(-1)]
public void A_non_positive_call_deadline_names_its_key(int seconds)
{
SecretsGrpcHubClientOptions options = Valid();
options.CallDeadline = TimeSpan.FromSeconds(seconds);
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
Assert.Contains("Secrets:GrpcHub:CallDeadline", ex.Message, StringComparison.Ordinal);
}
[Fact]
public void Messages_name_the_section_the_caller_actually_bound()
{
// The registration extension takes a section path, so a deployment that binds somewhere else
// must be told about ITS key, not the default one.
SecretsGrpcHubClientOptions options = Valid();
options.BearerToken = string.Empty;
InvalidOperationException ex = Assert.Throws<InvalidOperationException>(
() => options.Validate("Central:Secrets:Hub"));
Assert.Contains("Central:Secrets:Hub:BearerToken", ex.Message, StringComparison.Ordinal);
}
}
@@ -0,0 +1,186 @@
using Google.Protobuf;
using Grpc.Core;
using Microsoft.Extensions.Logging;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Tests;
/// <summary>
/// A <see cref="CallInvoker"/> that answers the two hub RPCs from canned responses and records what
/// the client sent.
/// </summary>
/// <remarks>
/// This is what lets the tests drive the <b>real</b> <c>GrpcSecretsHubClient</c> — the generated
/// client accepts a <see cref="CallInvoker"/>, so substituting one exercises the header, the
/// deadline and the wire-to-domain conversion without a live server. A fake of the
/// <c>ISecretsHubReader</c> seam would bypass every one of those.
/// </remarks>
internal sealed class FakeSecretsHubCallInvoker : CallInvoker
{
/// <summary>Response returned for <c>GetManifest</c>.</summary>
public GetManifestResponse ManifestResponse { get; set; } = new();
/// <summary>Response returned for <c>GetSecrets</c>.</summary>
public GetSecretsResponse SecretsResponse { get; set; } = new();
/// <summary>The options every call was invoked with, in call order.</summary>
public List<CallOptions> Calls { get; } = [];
/// <summary>The RPC names invoked, in call order.</summary>
public List<string> Methods { get; } = [];
/// <summary>The most recent <c>GetSecrets</c> request, so tests can assert what was asked for.</summary>
public GetSecretsRequest? LastSecretsRequest { get; private set; }
/// <summary>Returns the <c>Authorization</c> header value seen on the call at the given index.</summary>
/// <param name="index">Zero-based call index.</param>
/// <returns>The header value, or <see langword="null"/> when the header was not sent.</returns>
public string? AuthorizationOn(int index) =>
Calls[index].Headers?.GetValue("authorization");
/// <inheritdoc />
public override AsyncUnaryCall<TResponse> AsyncUnaryCall<TRequest, TResponse>(
Method<TRequest, TResponse> method, string? host, CallOptions options, TRequest request)
{
ArgumentNullException.ThrowIfNull(method);
Calls.Add(options);
Methods.Add(method.Name);
if (request is GetSecretsRequest secretsRequest)
{
LastSecretsRequest = secretsRequest;
}
object response = method.Name switch
{
"GetManifest" => ManifestResponse,
"GetSecrets" => SecretsResponse,
_ => throw new InvalidOperationException($"unexpected RPC '{method.Name}'."),
};
return new AsyncUnaryCall<TResponse>(
Task.FromResult((TResponse)response),
Task.FromResult(new Metadata()),
() => Status.DefaultSuccess,
() => new Metadata(),
() => { });
}
/// <inheritdoc />
public override TResponse BlockingUnaryCall<TRequest, TResponse>(
Method<TRequest, TResponse> method, string? host, CallOptions options, TRequest request) =>
throw new NotSupportedException("The hub client only makes async unary calls.");
/// <inheritdoc />
public override AsyncServerStreamingCall<TResponse> AsyncServerStreamingCall<TRequest, TResponse>(
Method<TRequest, TResponse> method, string? host, CallOptions options, TRequest request) =>
throw new NotSupportedException("The hub contract has no streaming RPC.");
/// <inheritdoc />
public override AsyncClientStreamingCall<TRequest, TResponse> AsyncClientStreamingCall<TRequest, TResponse>(
Method<TRequest, TResponse> method, string? host, CallOptions options) =>
throw new NotSupportedException("The hub contract has no streaming RPC.");
/// <inheritdoc />
public override AsyncDuplexStreamingCall<TRequest, TResponse> AsyncDuplexStreamingCall<TRequest, TResponse>(
Method<TRequest, TResponse> method, string? host, CallOptions options) =>
throw new NotSupportedException("The hub contract has no streaming RPC.");
}
/// <summary>A clock frozen at a caller-chosen instant, so a deadline assertion can be exact.</summary>
/// <param name="now">The instant every read returns.</param>
internal sealed class FixedTimeProvider(DateTimeOffset now) : TimeProvider
{
/// <inheritdoc />
public override DateTimeOffset GetUtcNow() => now;
}
/// <summary>Captures level and formatted message for every log entry.</summary>
/// <typeparam name="TCategory">The logger category.</typeparam>
internal sealed class RecordingLogger<TCategory> : ILogger<TCategory>
{
/// <summary>Formatted messages logged at <see cref="LogLevel.Information"/>.</summary>
public List<string> Information { get; } = [];
/// <summary>Formatted messages logged at <see cref="LogLevel.Warning"/>.</summary>
public List<string> Warnings { get; } = [];
/// <summary>Count of information entries.</summary>
public int InformationCount => Information.Count;
/// <summary>Count of warning entries.</summary>
public int WarningCount => Warnings.Count;
/// <inheritdoc />
public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
/// <inheritdoc />
public bool IsEnabled(LogLevel logLevel) => true;
/// <inheritdoc />
public void Log<TState>(
LogLevel logLevel,
EventId eventId,
TState state,
Exception? exception,
Func<TState, Exception?, string> formatter)
{
ArgumentNullException.ThrowIfNull(formatter);
string message = formatter(state, exception);
switch (logLevel)
{
case LogLevel.Information:
Information.Add(message);
break;
case LogLevel.Warning:
Warnings.Add(message);
break;
default:
break;
}
}
}
/// <summary>Builders for well-formed wire messages that individual tests then damage.</summary>
internal static class TestWire
{
/// <summary>A well-formed wire row.</summary>
/// <param name="name">The secret name.</param>
/// <param name="marker">A byte written into the ciphertext so the row is identifiable.</param>
/// <returns>The wire row.</returns>
public static SecretRow Row(string name, byte marker) => new()
{
Name = name,
ContentType = nameof(SecretContentType.Text),
Ciphertext = ByteString.CopyFrom(marker),
Nonce = ByteString.CopyFrom((byte)1),
Tag = ByteString.CopyFrom((byte)2),
WrappedDek = ByteString.CopyFrom((byte)3),
WrapNonce = ByteString.CopyFrom((byte)4),
WrapTag = ByteString.CopyFrom((byte)5),
KekId = "sha256:test",
Revision = 0,
IsDeleted = false,
CreatedUtc = FixedInstant.ToString("O"),
UpdatedUtc = FixedInstant.ToString("O"),
};
/// <summary>A well-formed manifest entry matching <see cref="Row"/>.</summary>
/// <param name="name">The secret name.</param>
/// <returns>The wire manifest entry.</returns>
public static ManifestEntry Entry(string name) => new()
{
Name = name,
Revision = 0,
UpdatedUtc = FixedInstant.ToString("O"),
IsDeleted = false,
};
/// <summary>The timestamp every builder stamps, so rows differ only where a test makes them differ.</summary>
public static readonly DateTimeOffset FixedInstant =
new(2026, 8, 7, 1, 2, 3, TimeSpan.Zero);
}
@@ -0,0 +1,210 @@
using System.Reflection;
using Google.Protobuf;
using ZB.MOM.WW.Secrets.Abstractions;
using ZB.MOM.WW.Secrets.Replicator.Grpc.V1;
using ZB.MOM.WW.Secrets.Replicator.Grpc.Wire;
namespace ZB.MOM.WW.Secrets.Replicator.Grpc.Tests;
/// <summary>
/// The proto -> domain boundary: a follower rebuilding rows a hub sent it. These are the checks
/// protobuf itself cannot make — a name that normalizes and validates, a content type that names a
/// real member, and timestamps whose exact representation survives, because last-writer-wins
/// compares them.
/// </summary>
public sealed class WireToDomainTests
{
private static SecretRow FullRow() => new()
{
Name = "db/password",
Description = "primary db",
ContentType = nameof(SecretContentType.ConnectionString),
Ciphertext = ByteString.CopyFrom(0xAA, 0xBB),
Nonce = ByteString.CopyFrom(1, 2, 3),
Tag = ByteString.CopyFrom(4, 5),
WrappedDek = ByteString.CopyFrom(6),
WrapNonce = ByteString.CopyFrom(7),
WrapTag = ByteString.CopyFrom(8),
KekId = "sha256:abc",
Revision = 7,
IsDeleted = false,
CreatedUtc = new DateTimeOffset(2026, 8, 7, 1, 2, 3, TimeSpan.Zero).ToString("O"),
UpdatedUtc = new DateTimeOffset(2026, 8, 7, 4, 5, 6, TimeSpan.Zero).ToString("O"),
CreatedBy = "alice",
UpdatedBy = "bob",
};
[Fact]
public void Row_maps_every_field_onto_the_domain_type()
{
StoredSecret row = WireToDomain.ToRow(FullRow());
Assert.Equal("db/password", row.Name.Value);
Assert.Equal("primary db", row.Description);
Assert.Equal(SecretContentType.ConnectionString, row.ContentType);
Assert.Equal(new byte[] { 0xAA, 0xBB }, row.Ciphertext);
Assert.Equal(new byte[] { 1, 2, 3 }, row.Nonce);
Assert.Equal(new byte[] { 4, 5 }, row.Tag);
Assert.Equal(new byte[] { 6 }, row.WrappedDek);
Assert.Equal(new byte[] { 7 }, row.WrapNonce);
Assert.Equal(new byte[] { 8 }, row.WrapTag);
Assert.Equal("sha256:abc", row.KekId);
Assert.Equal(7, row.Revision);
Assert.False(row.IsDeleted);
Assert.Null(row.DeletedUtc);
Assert.Equal("alice", row.CreatedBy);
Assert.Equal("bob", row.UpdatedBy);
}
[Fact]
public void Row_rejects_an_unrecognized_content_type()
{
// The reason the wire carries a NAME rather than a proto enum: an unknown value is rejected
// at the boundary instead of silently decoding to the zero value and retyping the secret.
SecretRow wire = FullRow();
wire.ContentType = "Kerberos";
ArgumentException ex = Assert.Throws<ArgumentException>(() => WireToDomain.ToRow(wire));
Assert.Contains("Kerberos", ex.Message, StringComparison.Ordinal);
}
[Fact]
public void Row_rejects_a_numeric_content_type_that_names_no_member()
{
SecretRow wire = FullRow();
wire.ContentType = "9999";
Assert.Throws<ArgumentException>(() => WireToDomain.ToRow(wire));
}
[Fact]
public void Row_rejects_a_name_the_domain_would_not_accept()
{
SecretRow wire = FullRow();
wire.ContentType = nameof(SecretContentType.Text);
wire.Name = "../../etc/passwd";
Assert.Throws<ArgumentException>(() => WireToDomain.ToRow(wire));
}
[Fact]
public void Row_distinguishes_an_absent_description_from_an_empty_one()
{
SecretRow absent = FullRow();
absent.ClearDescription();
Assert.Null(WireToDomain.ToRow(absent).Description);
SecretRow empty = FullRow();
empty.Description = string.Empty;
Assert.Equal(string.Empty, WireToDomain.ToRow(empty).Description);
}
[Fact]
public void Row_distinguishes_absent_from_empty_for_every_nullable_field()
{
SecretRow absent = FullRow();
absent.ClearCreatedBy();
absent.ClearUpdatedBy();
StoredSecret row = WireToDomain.ToRow(absent);
Assert.Null(row.CreatedBy);
Assert.Null(row.UpdatedBy);
}
[Fact]
public void Row_round_trips_a_non_utc_offset_exactly()
{
// The whole reason the contract uses "O" strings and not google.protobuf.Timestamp: an
// offset-bearing DateTimeOffset must come back byte-identical, because LWW compares it.
var updated = new DateTimeOffset(2026, 8, 7, 4, 5, 6, 789, TimeSpan.FromHours(-5));
SecretRow wire = FullRow();
wire.UpdatedUtc = updated.ToString("O");
StoredSecret row = WireToDomain.ToRow(wire);
Assert.Equal(updated, row.UpdatedUtc);
Assert.Equal(updated.Offset, row.UpdatedUtc.Offset);
Assert.Equal(updated.ToString("O"), row.UpdatedUtc.ToString("O"));
}
[Fact]
public void Row_maps_a_tombstone_with_its_deletion_timestamp()
{
var deleted = new DateTimeOffset(2026, 8, 7, 9, 9, 9, TimeSpan.Zero);
SecretRow wire = FullRow();
wire.IsDeleted = true;
wire.DeletedUtc = deleted.ToString("O");
StoredSecret row = WireToDomain.ToRow(wire);
Assert.True(row.IsDeleted);
Assert.Equal(deleted, row.DeletedUtc);
}
[Fact]
public void Row_leaves_the_deletion_timestamp_null_when_the_field_is_absent()
{
SecretRow wire = FullRow();
wire.ClearDeletedUtc();
Assert.Null(WireToDomain.ToRow(wire).DeletedUtc);
}
[Fact]
public void Row_rejects_a_malformed_timestamp()
{
SecretRow wire = FullRow();
wire.UpdatedUtc = "yesterday";
Assert.Throws<FormatException>(() => WireToDomain.ToRow(wire));
}
[Fact]
public void Manifest_entry_maps_and_validates_its_name()
{
var updated = new DateTimeOffset(2026, 8, 7, 4, 5, 6, TimeSpan.FromHours(2));
SecretManifestEntry entry = WireToDomain.ToEntry(new ManifestEntry
{
Name = "api/key",
Revision = 3,
UpdatedUtc = updated.ToString("O"),
IsDeleted = true,
});
Assert.Equal("api/key", entry.Name.Value);
Assert.Equal(3, entry.Revision);
Assert.Equal(updated, entry.UpdatedUtc);
Assert.True(entry.IsDeleted);
}
[Fact]
public void Manifest_entry_rejects_a_name_the_domain_would_not_accept()
{
Assert.Throws<ArgumentException>(() => WireToDomain.ToEntry(new ManifestEntry
{
Name = "/rooted",
Revision = 1,
UpdatedUtc = DateTimeOffset.UtcNow.ToString("O"),
}));
}
[Fact]
public void There_is_no_batch_entry_point_to_convert_a_whole_response_with()
{
// A batch method here would fail a whole response on one bad element, and since the pull set
// is derived from the hub's manifest the identical bad element would re-fail the identical
// sweep forever. Isolation belongs to GrpcSecretsHubClient, which converts item by item, so
// this pins that the strict parser offers nothing that could poison a batch again.
string[] members = typeof(WireToDomain)
.GetMethods(BindingFlags.Public | BindingFlags.Static | BindingFlags.DeclaredOnly)
.Select(m => m.Name)
.Order(StringComparer.Ordinal)
.ToArray();
Assert.Equal(["ToEntry", "ToRow"], members);
}
}