# Description
Introduces a pluggable user-identity provider model covering all OPC UA
Part 6 §6.5 mechanisms (Anonymous, UserName, X509, IssuedToken/JWT) on
both client and server, with full
`Microsoft.Extensions.DependencyInjection` integration, plus the Part 12
§9 `AuthorizationService` two-phase token-request flow **including
refresh-token rotation**, the Part 12 §8 KeyCredential Push model, and a
clean provider model for OPC 10000-12 §7.2 `ApplicationSelfAdmin`. The
work is split across phase-by-phase commits so it can be reviewed
independently; nothing here changes wire-level behaviour or forces
existing applications to migrate.
### Documentation
All under `Docs/`:
- `IdentityProviders.md` — full developer guide: three-layer model,
recipes, configuration reference, "what gets auto-wired" matrix, JWS
algorithm table, identity-augmenters section, **"Implementing your own
provider"** how-to subsections for Entra / OIDC / Windows / AspNetCore
(sibling files merged in per review feedback).
- `DependencyInjection.md` — `Identity` sections with `appsettings.json`
examples, identity-extension matrix, `WithAuthorizationService` +
`WithKeyCredentialPush` + `AddIdentityAugmenter` extensions documented.
- `RoleBasedUserManagement.md` — claim-criteria callout describing
`IIdentityClaims` probe surface.
- `AuthorizationService.md` — Architecture diagram +
`IAccessTokenProvider` conceptual narrative restored from master; modern
`StartRequestToken` / `FinishRequestToken` flow leads; refresh-token
recipe added.
- `KeyCredentialService.md` — Push model + Pull vs Push vs Bridge
decision matrix + Hybrid (Push + Pull) section; explicit experimental
warning for the bridge.
- `GDS.md` — KeyCredential Push, `StartRequestToken`,
`GdsApplicationSelfAdminProvider`, **shipped Refresh-token support with
rotation policy and audit semantics** all documented.
- `MigrationGuide.md` — User Identity Providers section listing
`[Obsolete]` markers + mechanical recipes; SelfAdmin migration via
`IIdentityAugmenter`; `EnableRefreshTokens` default note.
- `README.md` index entries.
## Checklist
- [x] I have signed the
[CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf)
and read the
[CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md)
doc.
- [x] I have added tests that prove my fix is effective or that my
feature works and increased code coverage.
- [x] I have added all necessary documentation.
- [x] I have verified that my changes do not introduce (new) build or
analyzer warnings.
- [x] I ran **all** tests locally using the **UA.slnx** solution against
at least .net **framework** and .net **10**, and all passed.
- [x] I fixed **all** failing and flaky tests in the CI pipelines and
**all** CodeQL warnings.
- [x] I have addressed **all** PR feedback received.
### Test project reorganization
Splits the integration- vs unit-test boundary along **project
boundaries**
and introduces a runtime-tier split for subscription tests so the
mainline
CI no longer drags in stress / durable suites.
**New projects:**
- `Opc.Ua.Stress.Tests` ΓÇö cross-area stress tier (designed to
absorb
session / channel / pub-sub stress in future). Seeded with the 6
subscription stress classes (`SubscriptionDepthTests`,
`SubscriptionBasicDepthTests`, `MonitoredItemDepthTests`,
`SubscriptionTransferDepthTests`, `SubscriptionPublishTooManyTests`,
`SubscriptionMultipleTests`). **Excluded from mainline CI; runs
nightly.**
- `Opc.Ua.Subscriptions.Durable.Tests` ΓÇö durable-subscription tier
(needs `DurableSubscriptionsEnabled` + storage-backed lifetime).
Receives `SubscriptionDurableTests` plus the migrated
`DurableSubscriptionTest` and `DurableSubscriptionTestDebug`.
**Excluded from mainline CI; runs nightly.**
- `Opc.Ua.Features.Tests` ΓÇö cross-feature integration tier.
Receives the
`[OneTimeSetUp]`-bootstraps-its-own-server integrations for AliasNames
(Part 17), Roles (Part 18), FileSystem (Part 5 §C / Part 20), and
NodeCache. Also absorbs the misplaced
`Tests/Opc.Ua.History.Tests/FileSystemTests.cs`.
**Client.Tests cleanup (~28 files moved):**
- `Opc.Ua.Sessions.Tests` (existing) gains 10 session integration files
plus the 4 session benchmark files inline (`LoadTest`,
`RequestHeaderTest`, `TraceableRequestHeaderTest`,
`SecurityPolicyBenchmarks`).
- `Opc.Ua.Subscriptions.Tests` (existing) gains 4 subscription
integration files plus `PooledNotificationBenchmarks` inline.
- `Opc.Ua.Client.ComplexTypes.Tests` (existing) gains all
`ComplexTypes/*` integration files. The Client.Tests copy of
`TypeSystemClientTest.cs` (a stale near-duplicate) is removed.
- Benchmarks **stay inline** as `[Test]` + BenchmarkDotNet dual-use; no
new benchmark project (per the approved plan).
**CI pipeline:**
- `.azurepipelines/test.yml` now filters
`TestCategory!=LongRunning&TestCategory!=Stress` on the mainline run.
- `-ExcludeFileName` now accepts a comma-separated list. The mainline
matrix excludes the 3 nightly-tier project files alongside the
existing `Opc.Ua.Aot.Tests.csproj`.
- `get-matrix.ps1` enhanced to support multi-pattern excludes.
`InternalsVisibleTo` extended on `Opc.Ua.Client` and `Opc.Ua.Server` to
grant the new test projects access. All affected projects build clean
(`0 Error`) for `net10.0`.
### Fix 8 skipped tests flagged as suspected bugs
Triage of every `[Ignore]` / `[Explicit]` test in `Tests/**` surfaced 8
entries labelled as suspected production bugs. After inspection:
- **1 real production bug** ΓÇö the
`CancellationTokenSource.CancelAsync`
polyfill for netstandard2.0 / netfx was running cancellation callbacks
inline on the caller's thread, deadlocking dispose paths
(`SubscriptionManager.DisposeAsync`, etc.) when a callback awaits on
the caller's `SynchronizationContext`. Fixed at the polyfill root by
hoisting `Cancel()` onto the ThreadPool via `Task.Run`, matching real
.NET 8+ semantics. Caveat (deferred `IsCancellationRequested`
transition) documented inline; all in-repo callers use
`await cts.CancelAsync()` so the deviation is invisible. Test
`DrainAsyncWaitsForInFlightPublishToCompleteAsync` un-ignored ΓÇö
verified passes on net48 (943 ms) and net10.0 (1 s).
- **2 flaky tests stabilized** ΓÇö both
`ValidateMetaDataUpdateTimeNonZeroIsSentPeriodically` (MQTT JSON &
UADP) now use `Stopwatch.GetTimestamp()` instead of `DateTime.Now`,
compute deviation against the **median** interval (not the configured
cadence, so a startup hiccup doesn't skew the run), and use a
proportional `max(interval / 4, 50 ms)` tolerance. `[Ignore]` removed,
`[Category("LongRunning")]` retained.
- **1 mis-labelled "bug"** ΓÇö
`UnorderedMessagesWouldBeLostForSequentialPublishingAsync` asserts the
*documented* lossy trade-off of strict sequential publishing.
`[Explicit]`
removed and renamed to
`OldMessagesAbandonedAfterRepublishTimeoutInSequentialModeAsync`; it's
now a CI-verified regression test for the WAI behavior.
- **4 false positives** ΓÇö `JsonEncoderTestsOld.cs` (16 kLOC) was
excluded from compilation via `<Compile Remove>` and never reached the
runner. The 4 `[Ignore("ProductionBugSuspected")]` markers inside were
orphaned source from a previous JsonEncoder API. Active coverage lives
in `JsonEncoderTests.cs` and `JsonValidationData` fixtures. Deleted
the orphan file and the now-redundant `<Compile Remove>` line.
* make most ptojects aot compatible
* Remove newtonsoft
* Migrate all projects from Mono.Options to System.CommandLine 2.0.5
* Fix array clone
* Replace serializers for storage using new attribute driven type geberator
* Add new AOT integration tests covering all functional areas
* Documentation updates
Generate stack and application code using source generators
Change built in types to readonly structs
Update localized text implementation to use JSON text serializer
Status code with symbolic names
Immutable node ids
No boxing for all built in types <= 8 bytes in Variant.
Split user identity token and token handling via token handler
Add migration guide for breaking changes
Marc Schier