Joseph Doherty
243 lines
13 KiB
C#
243 lines
13 KiB
C#
using System.Text;
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using System.Net;
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using System.Collections.Concurrent;
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using Microsoft.Extensions.Logging.Abstractions;
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using Opc.Ua;
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using Opc.Ua.Client;
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using Shouldly;
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using Xunit;
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using Opc.Ua.Configuration;
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using ZB.MOM.WW.OtOpcUa.Commons.OpcUa;
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using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
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using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
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using ZB.MOM.WW.OtOpcUa.Core.Authorization;
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using ZB.MOM.WW.OtOpcUa.OpcUaServer.Security;
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namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests;
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/// <summary>Real, mutually trusted channels: no auto-accept callbacks or insecure fallback.</summary>
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public sealed class Sdk2TrustedChannelTests
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{
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[Theory]
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[InlineData(OpcUaSecurityProfile.Basic256Sha256Sign, MessageSecurityMode.Sign)]
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[InlineData(OpcUaSecurityProfile.Basic256Sha256SignAndEncrypt, MessageSecurityMode.SignAndEncrypt)]
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public async Task Trusted_key_retains_narrow_authority_and_revocation_reaches_its_open_session(
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OpcUaSecurityProfile profile, MessageSecurityMode mode)
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{
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var ct = TestContext.Current.CancellationToken;
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await using var rig = await TrustedRig.StartAsync(profile, ct);
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using var session = await rig.ConnectAsync("contract-key", ct);
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session.Endpoint.SecurityMode.ShouldBe(mode);
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(await session.ReadValueAsync(rig.Node(session), ct)).WrappedValue.GetInt32().ShouldBe(7);
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(await rig.WriteAsync(session, 42, ct)).ShouldBe(StatusCodes.Good);
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rig.Writes.ShouldBe(1, "a narrow grant with no application-wide roles must permit the write");
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var observedPeer = rig.Peers.ShouldHaveSingleItem();
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observedPeer.ShouldNotBeNull();
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IPAddress.IsLoopback(observedPeer.Address).ShouldBeTrue();
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observedPeer.Port.ShouldBe(0, "the public SDK evidence supplies an IP address, not an invented client port");
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var originalSessionId = session.SessionId;
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await session.ReconnectAsync(null, null, ct);
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session.SessionId.ShouldBe(originalSessionId, "the test must reactivate the existing session on a new channel");
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rig.Peers.Count.ShouldBe(2);
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rig.Peers.Last().ShouldNotBeNull().Address.ShouldBe(observedPeer.Address);
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(await session.ReadValueAsync(rig.Node(session), ct)).StatusCode.ShouldBe(StatusCodes.Good);
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var identity = rig.Server.CurrentInstance.SessionManager.GetSessions().ShouldHaveSingleItem().EffectiveIdentity
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.ShouldBeOfType<RoleCarryingUserIdentity>();
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identity.Principal.ShouldBe(TrustedRig.Principal);
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identity.ApiKeyId.ShouldBe(TrustedRig.KeyId);
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identity.Roles.ShouldBeEmpty();
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rig.Revoke();
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(await rig.WriteAsync(session, 99, ct)).ShouldBe(StatusCodes.BadUserAccessDenied);
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rig.Writes.ShouldBe(1, "revocation must be checked before a cached narrow grant or dispatch");
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}
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[Theory]
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[InlineData(OpcUaSecurityProfile.Basic256Sha256Sign)]
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[InlineData(OpcUaSecurityProfile.Basic256Sha256SignAndEncrypt)]
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public async Task Trusted_channel_does_not_turn_invalid_credentials_into_another_identity(OpcUaSecurityProfile profile)
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{
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var ct = TestContext.Current.CancellationToken;
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await using var rig = await TrustedRig.StartAsync(profile, ct);
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var error = await Should.ThrowAsync<ServiceResultException>(() => rig.ConnectAsync("invalid", ct));
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error.StatusCode.ShouldBe(StatusCodes.BadIdentityTokenRejected);
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rig.Writes.ShouldBe(0);
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rig.Server.CurrentInstance.SessionManager.GetSessions().ShouldAllBe(s => !s.Activated);
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}
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[Fact]
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public async Task An_untrusted_client_is_rejected_before_application_authentication()
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{
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var ct = TestContext.Current.CancellationToken;
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await using var rig = await TrustedRig.StartAsync(OpcUaSecurityProfile.Basic256Sha256SignAndEncrypt, ct);
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var before = rig.AuthCalls;
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var error = await Should.ThrowAsync<ServiceResultException>(() => rig.ConnectAsync("contract-key", ct, untrustedClient: true));
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new[] { StatusCodes.BadCertificateUntrusted, StatusCodes.BadSecurityChecksFailed, StatusCodes.BadSecureChannelClosed }
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.ShouldContain(error.StatusCode);
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rig.AuthCalls.ShouldBe(before);
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rig.Writes.ShouldBe(0);
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}
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private sealed class TrustedRig : IAsyncDisposable, IOpcUaUserAuthenticator, IOpcUaNodeWriteGateway
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{
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internal const string Principal = "trusted-contract";
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internal const string KeyId = "k-trusted-contract";
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private const string Cluster = "SDK2";
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private const string PathId = "Plant/Device/Value";
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private readonly string _root = Path.Combine(Path.GetTempPath(), $"otua-trusted-{Guid.NewGuid():N}");
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private readonly Dictionary<ApplicationConfiguration, ApplicationInstance> _applications = [];
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private readonly DataPlaneAuthorityState _authority = new();
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private readonly OpcUaApplicationHostOptions _options;
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private OpcUaApplicationHost _host = null!;
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private int _port;
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private int _writes;
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private int _authCalls;
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internal ConcurrentQueue<IPEndPoint?> Peers { get; } = new();
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internal OtOpcUaSdkServer Server { get; private set; } = null!;
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internal int Writes => Volatile.Read(ref _writes);
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internal int AuthCalls => Volatile.Read(ref _authCalls);
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private string ServerPki => System.IO.Path.Combine(_root, "server");
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private string ClientPki => System.IO.Path.Combine(_root, "client");
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private TrustedRig(OpcUaSecurityProfile profile)
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{
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_options = new OpcUaApplicationHostOptions
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{
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ApplicationName = "Sdk2TrustedContract", ApplicationUri = $"urn:Sdk2TrustedContract:{Guid.NewGuid():N}",
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PublicHostname = "localhost", PkiStoreRoot = ServerPki, AllowAnonymous = false,
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AutoAcceptUntrustedClientCertificates = false, EnabledSecurityProfiles = [profile],
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};
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}
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internal static async Task<TrustedRig> StartAsync(OpcUaSecurityProfile profile, CancellationToken ct)
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{
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var rig = new TrustedRig(profile);
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try
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{
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// Provision both certificates, then reload the managers with explicit trusted-peer stores.
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await rig.BootAsync(ct);
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await rig._host.DisposeAsync();
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var client = await rig.ConfigurationAsync(rig.ClientPki, ct);
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CopyCertificates(rig.ServerPki, rig.ClientPki);
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CopyCertificates(rig.ClientPki, rig.ServerPki);
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await rig.ReleaseConfigurationAsync(client);
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await rig.BootAsync(ct);
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rig.InstallAuthority(enabled: true);
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var nm = rig.Server.NodeManager!;
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nm.DataPlaneAuthority = rig._authority;
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nm.Authorizer = new DataPlaneAuthorizer(rig._authority, new TriePermissionEvaluator(rig._authority.Tries),
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true, NullLogger.Instance, TimeProvider.System);
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nm.NodeWriteGateway = rig;
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var sink = new SdkAddressSpaceSink(nm);
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sink.EnsureFolder("Plant", null, "Plant", AddressSpaceRealm.Raw);
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sink.EnsureFolder("Plant/Device", "Plant", "Device", AddressSpaceRealm.Raw);
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sink.EnsureVariable(PathId, "Plant/Device", "Value", "Int32", true, AddressSpaceRealm.Raw);
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sink.WriteValue(PathId, 7, OpcUaStatus.Good, DateTime.UtcNow, AddressSpaceRealm.Raw);
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return rig;
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}
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catch { await rig.DisposeAsync(); throw; }
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}
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private async Task BootAsync(CancellationToken ct)
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{
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(_host, Server) = await OpcUaHostStart.StartAsync(port =>
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{
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_port = port; _options.OpcUaPort = port;
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return new OpcUaApplicationHost(_options, NullLogger<OpcUaApplicationHost>.Instance, this);
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}, () => new OtOpcUaSdkServer(), ct);
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}
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private static void CopyCertificates(string from, string to)
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{
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var destination = System.IO.Path.Combine(to, "trusted", "certs");
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Directory.CreateDirectory(destination);
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foreach (var file in Directory.GetFiles(System.IO.Path.Combine(from, "own", "certs"), "*.der"))
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File.Copy(file, System.IO.Path.Combine(destination, System.IO.Path.GetFileName(file)), overwrite: true);
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}
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private async Task<ApplicationConfiguration> ConfigurationAsync(string pki, CancellationToken ct)
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{
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var telemetry = DefaultTelemetry.Create(_ => { });
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var security = TestClientSecurity.Build(pki);
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security.AutoAcceptUntrustedCertificates = false;
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security.ApplicationCertificate!.SubjectName = "CN=Sdk2TrustedClient";
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var config = new ApplicationConfiguration(telemetry)
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{
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ApplicationName = "Sdk2TrustedClient", ApplicationUri = "urn:localhost:Sdk2TrustedClient",
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ApplicationType = ApplicationType.Client, SecurityConfiguration = security,
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ClientConfiguration = new ClientConfiguration { DefaultSessionTimeout = 60_000 },
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};
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var app = new ApplicationInstance(telemetry)
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{ ApplicationName = config.ApplicationName, ApplicationType = ApplicationType.Client, ApplicationConfiguration = config };
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try
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{
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await config.ValidateAsync(ApplicationType.Client, ct);
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await app.CheckApplicationInstanceCertificatesAsync(true, lifeTimeInMonths: 12, ct);
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_applications.Add(config, app);
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return config;
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}
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catch { await app.DisposeAsync(); throw; }
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}
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private async Task ReleaseConfigurationAsync(ApplicationConfiguration config)
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{
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if (_applications.Remove(config, out var app)) await app.DisposeAsync();
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}
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internal async Task<ISession> ConnectAsync(string credential, CancellationToken ct, bool untrustedClient = false)
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{
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var pki = untrustedClient ? System.IO.Path.Combine(_root, $"untrusted-{Guid.NewGuid():N}") : ClientPki;
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var config = await ConfigurationAsync(pki, ct);
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if (untrustedClient)
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{
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await ReleaseConfigurationAsync(config);
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CopyCertificates(ServerPki, pki);
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config = await ConfigurationAsync(pki, ct);
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}
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config.SecurityConfiguration.AutoAcceptUntrustedCertificates.ShouldBeFalse();
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var telemetry = DefaultTelemetry.Create(_ => { });
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var endpoint = await CoreClientUtils.SelectEndpointAsync(config, $"opc.tcp://localhost:{_port}/OtOpcUa", true, telemetry, ct)
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?? throw new InvalidOperationException("No secure endpoint.");
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return await new DefaultSessionFactory(telemetry).CreateAsync(config,
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new ConfiguredEndpoint(null, endpoint, EndpointConfiguration.Create(config)), false, true,
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"Sdk2TrustedContract", 60_000, new UserIdentity("apikey", Encoding.UTF8.GetBytes(credential)), default, ct);
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}
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internal NodeId Node(ISession session) => new(PathId, (ushort)session.NamespaceUris.GetIndex(V3NodeIds.RawNamespaceUri));
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internal async Task<StatusCode> WriteAsync(ISession session, int value, CancellationToken ct) =>
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(await session.WriteAsync(null, [new WriteValue { NodeId = Node(session), AttributeId = Attributes.Value,
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Value = new DataValue(Variant.From(value)) }], ct)).Results[0];
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internal void Revoke() => InstallAuthority(enabled: false);
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private void InstallAuthority(bool enabled) => _authority.Apply(Cluster, enabled ? "allowed" : "revoked",
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[new ApiKey { ApiKeyId = KeyId, Name = KeyId, Principal = Principal, Enabled = enabled,
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SecretHash = "hash", CreatedUtc = DateTime.UtcNow.AddDays(-1) }],
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[new NodeAcl { NodeAclId = "narrow", ClusterId = Cluster, Principal = Principal,
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ScopeKind = NodeAclScopeKind.RawDevice, ScopeId = "device", PermissionFlags =
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NodePermissions.Read | NodePermissions.Browse | NodePermissions.Subscribe | NodePermissions.WriteOperate }],
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new Dictionary<AclScopeRef, IReadOnlyList<NodeAclPath>>
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{ [new(NodeAclScopeKind.RawDevice, "device")] = [new([NodeAclRealms.Raw, "Plant", "Device"])] });
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public Task<OpcUaUserAuthResult> AuthenticateUserNameAsync(string username, string password, IPEndPoint? peer, CancellationToken ct)
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{
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Peers.Enqueue(peer is null ? null : new IPEndPoint(peer.Address, peer.Port));
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return AuthenticateUserNameAsync(username, password, ct);
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}
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public Task<OpcUaUserAuthResult> AuthenticateUserNameAsync(string username, string password, CancellationToken ct)
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{
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Interlocked.Increment(ref _authCalls);
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return Task.FromResult(username == "apikey" && password == "contract-key"
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? OpcUaUserAuthResult.AllowKey(Principal, [], KeyId) : OpcUaUserAuthResult.Deny("Invalid credential."));
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}
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public Task<NodeWriteOutcome> WriteAsync(string nodeId, object? value, AddressSpaceRealm realm, CancellationToken ct)
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{ Interlocked.Increment(ref _writes); return Task.FromResult(new NodeWriteOutcome(true, null)); }
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public async ValueTask DisposeAsync()
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{
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if (_host is not null) await _host.DisposeAsync();
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foreach (var app in _applications.Values) await app.DisposeAsync();
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_applications.Clear();
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if (Directory.Exists(_root)) Directory.Delete(_root, true);
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}
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}
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}
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