up

src/__Libraries/StellaOps.Cryptography.Kms/ServiceCollectionExtensions.cs

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+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Options;
+using StellaOps.Cryptography;
+
+namespace StellaOps.Cryptography.Kms;
+
+/// <summary>
+/// Dependency injection helpers for the KMS client and crypto provider.
+/// </summary>
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddFileKms(
+        this IServiceCollection services,
+        Action<FileKmsOptions> configure)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(configure);
+
+        services.Configure(configure);
+
+        services.TryAddSingleton<IKmsClient>(sp =>
+        {
+            var options = sp.GetRequiredService<IOptions<FileKmsOptions>>().Value;
+            return new FileKmsClient(options);
+        });
+
+        services.TryAddEnumerable(ServiceDescriptor.Singleton<ICryptoProvider, KmsCryptoProvider>());
+
+        return services;
+    }
+}