Add support for dotnet 10 (#2229)

* Add dotnet10 as target framework and fix breaking changes

* Fix tests

* Fix tests for CI

* Fix typo

Source/MQTTnet.Server/Internal/Adapter/MqttTcpServerListener.cs

@@ -202,9 +202,14 @@ public sealed class MqttTcpServerListener : IDisposable
 
                 clientCertificate = sslStream.RemoteCertificate as X509Certificate2;
 
+                // TODO: Check why this export is needed. Is there something else in the RemoteCertificate as a X509Certificate2???
                 if (clientCertificate == null && sslStream.RemoteCertificate != null)
                 {
+                    #if NET10_0_OR_GREATER
+                    clientCertificate = X509CertificateLoader.LoadCertificate(sslStream.RemoteCertificate.Export(X509ContentType.Cert));
+                    #else
                     clientCertificate = new X509Certificate2(sslStream.RemoteCertificate.Export(X509ContentType.Cert));
+                    #endif
                 }
             }
 

Source/MQTTnet.TestApp/MQTTnet.TestApp.csproj

@@ -2,7 +2,6 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <DebugType>Full</DebugType>
         <IsPackable>false</IsPackable>
     </PropertyGroup>
 

Source/MQTTnet.Tests/MQTTnet.Tests.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-
         <OutputType>Exe</OutputType>
         <IsPackable>false</IsPackable>
         <LangVersion>default</LangVersion>

Source/MQTTnet.Tests/Server/HotSwapCerts_Tests.cs

@@ -122,10 +122,12 @@ public sealed class HotSwapCerts_Tests
         certRequest.CertificateExtensions.Add(sanBuilder.Build());
 
         using var certificate = certRequest.CreateSelfSigned(DateTimeOffset.Now.AddMinutes(-10), DateTimeOffset.Now.AddMinutes(10));
+#pragma warning disable SYSLIB0057
         var pfxCertificate = new X509Certificate2(
             certificate.Export(X509ContentType.Pfx),
             (string)null,
             X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.Exportable);
+#pragma warning restore SYSLIB0057
 
         return pfxCertificate;
     }

Source/MQTTnet.Tests/Server/Load_Tests.cs

@@ -1,5 +1,6 @@
 #if DEBUG
 
+using System.Globalization;
 using MQTTnet.Internal;
 using MQTTnet.Packets;
 using MQTTnet.Protocol;
@@ -52,7 +53,7 @@ public sealed class Load_Tests : BaseTestClass
 
                         for (var j = 0; j < 1000; j++)
                         {
-                            publishPacket.Topic = j.ToString();
+                            publishPacket.Topic = j.ToString(CultureInfo.InvariantCulture);
 
                             await client.SendAsync(publishPacket, CancellationToken.None);
                         }
@@ -139,7 +140,7 @@ public sealed class Load_Tests : BaseTestClass
 
                     for (var j = 0; j < 1000; j++)
                     {
-                        var message = applicationMessageBuilder.WithTopic(j.ToString()).Build();
+                        var message = applicationMessageBuilder.WithTopic(j.ToString(CultureInfo.InvariantCulture)).Build();
 
                         await client.PublishAsync(message);
                     }

Source/MQTTnet.Tests/Server/Subscription_TopicHash_Tests.cs

@@ -520,10 +520,11 @@ public sealed class SubscriptionTopicHashTests : IDisposable
     static byte[] GetBytes(ulong value)
     {
         var bytes = BitConverter.GetBytes(value);
+
         // Ensure that highest byte comes first for comparison left to right
         if (BitConverter.IsLittleEndian)
         {
-            return bytes.Reverse().ToArray();
+            bytes = bytes.AsEnumerable().Reverse().ToArray();
         }
 
         return bytes;

Source/MQTTnet.Tests/Server/Tls_Tests.cs

@@ -31,10 +31,12 @@ public sealed class Tls_Tests : BaseTestClass
         certRequest.CertificateExtensions.Add(sanBuilder.Build());
 
         using var certificate = certRequest.CreateSelfSigned(DateTimeOffset.Now.AddMinutes(-10), DateTimeOffset.Now.AddMinutes(10));
+#pragma warning disable SYSLIB0057
         var pfxCertificate = new X509Certificate2(
             certificate.Export(X509ContentType.Pfx),
             (string)null,
             X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.Exportable);
+#pragma warning restore SYSLIB0057
 
         return pfxCertificate;
     }

Source/MQTTnet/Certificates/BlobCertificateProvider.cs

@@ -14,6 +14,17 @@ public class BlobCertificateProvider(byte[] blob) : ICertificateProvider
 
     public X509Certificate2 GetCertificate()
     {
+        #if NET10_0_OR_GREATER
+
+        if (string.IsNullOrEmpty(Password))
+        {
+            return X509CertificateLoader.LoadCertificate(Blob);
+        }
+
+        return X509CertificateLoader.LoadPkcs12(Blob, Password);
+
+        #else
+
         if (string.IsNullOrEmpty(Password))
         {
             // Use a different overload when no password is specified. Otherwise, the constructor will fail.
@@ -21,5 +32,7 @@ public class BlobCertificateProvider(byte[] blob) : ICertificateProvider
         }
 
         return new X509Certificate2(Blob, Password);
+
+        #endif
     }
 }

Source/ReleaseNotes.md

@@ -7,3 +7,4 @@
 * Marked all projects as AOT compatible
 * Restored the strong name of the nugets
 * Embedded license file in all nugets (#2197, thanks to @JensNordenbro)
+* Added support for dotnet10