Data Protection Diagnostic Entry

identity-server/src/IdentityServer/Configuration/DependencyInjection/BuilderExtensions/Core.cs

@@ -217,6 +217,7 @@ public static IIdentityServerBuilder AddCoreServices(this IIdentityServerBuilder
         builder.Services.AddSingleton(new ServiceCollectionAccessor(builder.Services));
         builder.Services.AddSingleton<IDiagnosticEntry, RegisteredImplementationsDiagnosticEntry>();
         builder.Services.AddSingleton<IDiagnosticEntry, IdentityServerOptionsDiagnosticEntry>();
+        builder.Services.AddSingleton<IDiagnosticEntry, DataProtectionDiagnosticEntry>();
         builder.Services.AddSingleton<DiagnosticSummary>();
         builder.Services.AddHostedService<DiagnosticHostedService>();
 

identity-server/src/IdentityServer/Licensing/V2/Diagnostics/DiagnosticEntries/DataProtectionDiagnosticEntry.cs

@@ -0,0 +1,23 @@
+// Copyright (c) Duende Software. All rights reserved.
+// See LICENSE in the project root for license information.
+
+using System.Text.Json;
+using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.DataProtection.KeyManagement;
+using Microsoft.Extensions.Options;
+
+namespace Duende.IdentityServer.Licensing.V2.Diagnostics.DiagnosticEntries;
+
+internal class DataProtectionDiagnosticEntry(IOptions<DataProtectionOptions> dataProtectionOptions, IOptions<KeyManagementOptions> keyManagementOptions) : IDiagnosticEntry
+{
+    public Task WriteAsync(Utf8JsonWriter writer)
+    {
+        writer.WriteStartObject("DataProtectionConfiguration");
+        writer.WriteString("ApplicationDiscriminator", dataProtectionOptions?.Value?.ApplicationDiscriminator ?? "Not Configured");
+        writer.WriteString("XmlEncryptor", keyManagementOptions?.Value.XmlEncryptor?.GetType().FullName ?? "Not Configured");
+        writer.WriteString("XmlRepository", keyManagementOptions?.Value.XmlRepository?.GetType().FullName ?? "Not Configured");
+        writer.WriteEndObject();
+
+        return Task.CompletedTask;
+    }
+}

identity-server/test/IdentityServer.UnitTests/Licensing/v2/DiagnosticEntries/DataProtectionDiagnosticEntryTests.cs

@@ -0,0 +1,66 @@
+// Copyright (c) Duende Software. All rights reserved.
+// See LICENSE in the project root for license information.
+
+using System.Xml.Linq;
+using Duende.IdentityServer.Licensing.V2.Diagnostics.DiagnosticEntries;
+using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.DataProtection.KeyManagement;
+using Microsoft.AspNetCore.DataProtection.Repositories;
+using Microsoft.AspNetCore.DataProtection.XmlEncryption;
+using Microsoft.Extensions.Options;
+
+namespace IdentityServer.UnitTests.Licensing.V2.DiagnosticEntries;
+
+public class DataProtectionDiagnosticEntryTests
+{
+    [Fact]
+    public async Task WriteAsync_WithConfiguredOptions_ShouldWriteCorrectValues()
+    {
+        var dataProtectionOptions = Options.Create(new DataProtectionOptions
+        {
+            ApplicationDiscriminator = "TestApplication"
+        });
+        var keyManagementOptions = Options.Create(new KeyManagementOptions
+        {
+            XmlEncryptor = new TestXmlEncryptor(),
+            XmlRepository = new TestXmlRepository()
+        });
+        var subject = new DataProtectionDiagnosticEntry(dataProtectionOptions, keyManagementOptions);
+
+        var result = await DiagnosticEntryTestHelper.WriteEntryToJson(subject);
+
+        var dataProtectionConfiguration = result.RootElement.GetProperty("DataProtectionConfiguration");
+        dataProtectionConfiguration.GetProperty("ApplicationDiscriminator").GetString().ShouldBe("TestApplication");
+        dataProtectionConfiguration.GetProperty("XmlEncryptor").GetString().ShouldBe(typeof(TestXmlEncryptor).FullName);
+        dataProtectionConfiguration.GetProperty("XmlRepository").GetString().ShouldBe(typeof(TestXmlRepository).FullName);
+    }
+
+    [Fact]
+    public async Task WriteAsync_WithDefaultOptions_ShouldWriteDefaultValues()
+    {
+        var subject = new DataProtectionDiagnosticEntry(
+            Options.Create(new DataProtectionOptions()),
+            Options.Create(new KeyManagementOptions()));
+
+        var result = await DiagnosticEntryTestHelper.WriteEntryToJson(subject);
+
+        var dataProtectionConfiguration = result.RootElement.GetProperty("DataProtectionConfiguration");
+        dataProtectionConfiguration.GetProperty("ApplicationDiscriminator").GetString().ShouldBe("Not Configured");
+        dataProtectionConfiguration.GetProperty("XmlEncryptor").GetString().ShouldBe("Not Configured");
+        dataProtectionConfiguration.GetProperty("XmlRepository").GetString().ShouldBe("Not Configured");
+    }
+
+    private class TestXmlEncryptor : IXmlEncryptor
+    {
+        public EncryptedXmlInfo Encrypt(XElement plaintextElement) => new EncryptedXmlInfo(plaintextElement, typeof(TestXmlEncryptor));
+    }
+
+    private class TestXmlRepository : IXmlRepository
+    {
+        public IReadOnlyCollection<XElement> GetAllElements() => Array.Empty<XElement>();
+
+        public void StoreElement(XElement element, string friendlyName)
+        {
+        }
+    }
+}