part #2

src/__Libraries/StellaOps.Cryptography.Plugin.EIDAS/TrustServiceProviderClient.Verification.cs

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: BUSL-1.1
+// Sprint: SPRINT_4100_0006_0002 - eIDAS Crypto Plugin
+using Microsoft.Extensions.Logging;
+using StellaOps.Cryptography.Plugin.EIDAS.Configuration;
+
+namespace StellaOps.Cryptography.Plugin.EIDAS;
+
+public partial class TrustServiceProviderClient
+{
+    /// <summary>
+    /// Remote verification via TSP (stub implementation).
+    /// </summary>
+    public async Task<bool> RemoteVerifyAsync(
+        byte[] data,
+        byte[] signature,
+        string algorithmId,
+        EidasKeyConfig keyConfig,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogDebug("TSP remote verification request: keyId={KeyId}, algorithm={Algorithm}",
+            keyConfig.KeyId, algorithmId);
+
+        _logger.LogWarning("Using stub TSP verification - replace with actual TSP API call in production");
+
+        // Stub: Always return true
+        await Task.Delay(50, cancellationToken).ConfigureAwait(false); // Simulate network latency
+
+        _logger.LogInformation("TSP remote verification complete: keyId={KeyId}, valid=true",
+            keyConfig.KeyId);
+
+        return true;
+
+        // Production implementation would be:
+        // var hash = SHA256.HashData(data);
+        // var request = new
+        // {
+        //     keyId = keyConfig.KeyId,
+        //     algorithm = algorithmId,
+        //     dataHash = Convert.ToBase64String(hash),
+        //     signature = Convert.ToBase64String(signature)
+        // };
+        //
+        // var response = await _httpClient.PostAsJsonAsync("/api/v1/verify", request, cancellationToken);
+        // response.EnsureSuccessStatusCode();
+        //
+        // var result = await response.Content.ReadFromJsonAsync<TspVerifyResponse>(cancellationToken);
+        // return result.Valid;
+    }
+}