feat(secrets): Grpc hub client — pull-only sweep service + options + DI

Client half of the central-hosted secrets hub: a site node follows central and
never pushes.

- `ISecretsHubReader` + `GrpcSecretsHubClient` — the read half of the hub as a
  follower sees it (manifest + bulk fetch, nothing else). Bearer credential and a
  per-call deadline are attached per call; responses convert through
  `WireToDomain`. Faults are deliberately not caught here, so an unreachable hub
  can never be mistaken for an empty one.
- `WireToDomain` — strict, per-row proto -> domain parse mirroring the Akka
  replicator's `SecretRowDto`: a name the domain would reject, a content type
  naming no enum member, or a non-round-trip timestamp is refused at the boundary.
  Explicit proto3 presence keeps null distinguishable from empty.
- `GrpcSecretSyncService` — `SqlServerSecretSyncService` with the push half
  removed. One `ReconcileAsync` per tick (pull-only by the reconciler's own
  contract, and batched, so a cold-start pull set cannot exceed gRPC's 4 MB cap),
  never throws out of `ExecuteAsync`, warns once and retries on the next interval.
  The local store is left completely undecorated — the sweep is its only hub-ward
  writer.
- `SecretsGrpcHubClientOptions` — fail-closed `Validate()` naming the exact
  configuration key, including the section a caller actually bound. The bearer
  token is never echoed by any message.
- `AddZbSecretsGrpcHubClient` — binds, eagerly validates, and registers the
  channel under a service KEY so it cannot lose a `TryAdd` race to an
  application's own `GrpcChannel` and dial the wrong endpoint with the hub
  credential attached.

Tests 52/52 (red-first), including a source-scan guard pinning that no client file
names `ComputePushSet`, `ReadLocalAsync`, or `ApplyReplicatedAsync`, and a
reflection pin that the reader seam exposes exactly two read operations.

Claude-Session: https://claude.ai/code/session_014WNM4vjoVksyyBraTXSZE1
This commit is contained in:
Joseph Doherty
2026-08-07 06:12:03 -04:00
parent cc95590196
commit c5ea3a7b59
8 changed files with 1429 additions and 0 deletions
@@ -0,0 +1,504 @@
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.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 _logger = 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 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);
}
private sealed class RecordingLogger : ILogger<GrpcSecretSyncService>
{
public int InformationCount { get; private set; }
public int WarningCount { get; private set; }
public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
public bool IsEnabled(LogLevel logLevel) => true;
public void Log<TState>(
LogLevel logLevel,
EventId eventId,
TState state,
Exception? exception,
Func<TState, Exception?, string> formatter)
{
switch (logLevel)
{
case LogLevel.Information:
InformationCount++;
break;
case LogLevel.Warning:
WarningCount++;
break;
default:
break;
}
}
}
}
@@ -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 +1,205 @@
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 Batch_conversions_preserve_order()
{
SecretRow first = FullRow();
SecretRow second = FullRow();
second.Name = "api/key";
IReadOnlyList<StoredSecret> rows = WireToDomain.ToRows([first, second]);
Assert.Equal(["db/password", "api/key"], rows.Select(r => r.Name.Value));
}
}