part #2

src/__Libraries/StellaOps.Cryptography.DependencyInjection/CryptoPluginProviderRegistry.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.Extensions.Options;
+using StellaOps.Cryptography;
+
+namespace StellaOps.Cryptography.DependencyInjection;
+
+internal sealed class CryptoPluginProviderRegistry : ICryptoProviderRegistry
+{
+    private readonly CryptoProviderRegistry _registry;
+
+    public CryptoPluginProviderRegistry(
+        IReadOnlyList<ICryptoProvider> providers,
+        IOptionsMonitor<CryptoProviderRegistryOptions>? optionsMonitor = null)
+    {
+        ArgumentNullException.ThrowIfNull(providers);
+        var preferred = optionsMonitor?.CurrentValue?.ResolvePreferredProviders();
+        _registry = new CryptoProviderRegistry(providers, preferred);
+    }
+
+    public IReadOnlyCollection<ICryptoProvider> Providers => _registry.Providers;
+    public bool TryResolve(string preferredProvider, out ICryptoProvider provider)
+        => _registry.TryResolve(preferredProvider, out provider);
+    public ICryptoProvider ResolveOrThrow(CryptoCapability capability, string algorithmId)
+        => _registry.ResolveOrThrow(capability, algorithmId);
+    public CryptoSignerResolution ResolveSigner(
+        CryptoCapability capability,
+        string algorithmId,
+        CryptoKeyReference keyReference,
+        string? preferredProvider = null)
+        => _registry.ResolveSigner(capability, algorithmId, keyReference, preferredProvider);
+    public CryptoHasherResolution ResolveHasher(string algorithmId, string? preferredProvider = null)
+        => _registry.ResolveHasher(algorithmId, preferredProvider);
+}