feat: update certificate loading logic for .NET 9 compatibility

Author: tg123

tests/KubernetesClient.Tests/AuthTests.cs

@@ -188,10 +188,18 @@ public void Cert()
             }
             else
             {
+#if NET9_0_OR_GREATER
+                serverCertificate = X509CertificateLoader.LoadPkcs12(Convert.FromBase64String(serverCertificateData), "");
+#else
                 serverCertificate = new X509Certificate2(Convert.FromBase64String(serverCertificateData), "");
+#endif
             }
 
+#if NET9_0_OR_GREATER
+            var clientCertificate = X509CertificateLoader.LoadPkcs12(Convert.FromBase64String(clientCertificateData), "");
+#else
             var clientCertificate = new X509Certificate2(Convert.FromBase64String(clientCertificateData), "");
+#endif
 
             var clientCertificateValidationCalled = false;
 
@@ -294,10 +302,18 @@ public void ExternalCertificate()
             }
             else
             {
+#if NET9_0_OR_GREATER
+                serverCertificate = X509CertificateLoader.LoadPkcs12(serverCertificateData, "");
+#else
                 serverCertificate = new X509Certificate2(serverCertificateData, "");
+#endif
             }
 
+#if NET9_0_OR_GREATER
+            var clientCertificate = X509CertificateLoader.LoadPkcs12(clientCertificateData, "");
+#else
             var clientCertificate = new X509Certificate2(clientCertificateData, "");
+#endif
 
             var clientCertificateValidationCalled = false;
 

tests/KubernetesClient.Tests/CertUtilsTests.cs

@@ -85,8 +85,13 @@ public void LoadPemWithMultiCert()
         {
             var certCollection = CertUtils.LoadPemFileCert("assets/ca-bundle.crt");
 
+#if NET9_0_OR_GREATER
+            using var intermediateCert = X509CertificateLoader.LoadCertificateFromFile("assets/ca-bundle-intermediate.crt");
+            using var rootCert = X509CertificateLoader.LoadCertificateFromFile("assets/ca-bundle-root.crt");
+#else
             using var intermediateCert = new X509Certificate2("assets/ca-bundle-intermediate.crt");
             using var rootCert = new X509Certificate2("assets/ca-bundle-root.crt");
+#endif
 
             Assert.Equal(2, certCollection.Count);
 

tests/KubernetesClient.Tests/CertificateValidationTests.cs

@@ -68,7 +68,11 @@ private static X509Certificate2 CreateServerCert(X509Certificate2 issuerCA, stri
         public void ValidCert()
         {
             var caCert = CertUtils.LoadPemFileCert("assets/ca.crt");
+#if NET9_0_OR_GREATER
+            var testCert = X509CertificateLoader.LoadCertificateFromFile("assets/ca.crt");
+#else
             var testCert = new X509Certificate2("assets/ca.crt");
+#endif
             var chain = new X509Chain();
             var errors = SslPolicyErrors.RemoteCertificateChainErrors;
 
@@ -81,7 +85,11 @@ public void ValidCert()
         public void InvalidCert()
         {
             var caCert = CertUtils.LoadPemFileCert("assets/ca.crt");
+#if NET9_0_OR_GREATER
+            var testCert = X509CertificateLoader.LoadCertificateFromFile("assets/ca2.crt");
+#else
             var testCert = new X509Certificate2("assets/ca2.crt");
+#endif
             var chain = new X509Chain();
             var errors = SslPolicyErrors.RemoteCertificateChainErrors;
 
@@ -110,7 +118,11 @@ public void ValidBundleCert()
         public void InvalidBundleCert()
         {
             var caCert = CertUtils.LoadPemFileCert("assets/ca-bundle.crt");
+#if NET9_0_OR_GREATER
+            var testCert = X509CertificateLoader.LoadCertificateFromFile("assets/ca2.crt");
+#else
             var testCert = new X509Certificate2("assets/ca2.crt");
+#endif
             var chain = new X509Chain();
             var errors = SslPolicyErrors.RemoteCertificateChainErrors;