SslStream test keylogfile creation (#94859)

* Added the same test as we have for Quic for SSLKEYLOGFILE creation

* Added the same test as we have for Quic for SSLKEYLOGFILE creation

src/libraries/System.Net.Security/tests/FunctionalTests/SslStreamRemoteExecutorTests.cs

@@ -0,0 +1,64 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Net.Security;
+using System.Security.Cryptography.X509Certificates;
+using System.Threading.Tasks;
+using Microsoft.DotNet.RemoteExecutor;
+using Microsoft.DotNet.XUnitExtensions;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace System.Net.Security.Tests
+{
+    using Configuration = System.Net.Test.Common.Configuration;
+
+    public class SslStreamRemoteExecutorTests
+    {
+        public SslStreamRemoteExecutorTests()
+        { }
+
+        [ConditionalFact(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/94843", ~TestPlatforms.Linux)]
+        public void SslKeyLogFile_IsCreatedAndFilled()
+        {
+            if (PlatformDetection.IsReleaseLibrary(typeof(SslStream).Assembly))
+            {
+                throw new SkipTestException("Retrieving SSL secrets is not supported in Release mode.");
+            }
+
+            var psi = new ProcessStartInfo();
+            var tempFile = Path.GetTempFileName();
+            psi.Environment.Add("SSLKEYLOGFILE", tempFile);
+
+            RemoteExecutor.Invoke(async () =>
+            {
+                (Stream clientStream, Stream serverStream) = TestHelper.GetConnectedStreams();
+                using (clientStream)
+                using (serverStream)
+                using (var client = new SslStream(clientStream))
+                using (var server = new SslStream(serverStream))
+                using (X509Certificate2 certificate = Configuration.Certificates.GetServerCertificate())
+                {
+                    SslClientAuthenticationOptions clientOptions = new SslClientAuthenticationOptions();
+                    clientOptions.RemoteCertificateValidationCallback = delegate { return true; };
+
+                    SslServerAuthenticationOptions serverOptions = new SslServerAuthenticationOptions();
+                    serverOptions.ServerCertificate = certificate;
+
+                    await TestConfiguration.WhenAllOrAnyFailedWithTimeout(
+                        client.AuthenticateAsClientAsync(clientOptions),
+                        server.AuthenticateAsServerAsync(serverOptions));
+
+                    await TestHelper.PingPong(client, server);
+                }
+            }, new RemoteInvokeOptions { StartInfo = psi }).Dispose();
+
+            Assert.True(File.Exists(tempFile));
+            Assert.True(File.ReadAllText(tempFile).Length > 0);
+        }
+    }
+}

src/libraries/System.Net.Security/tests/FunctionalTests/System.Net.Security.Tests.csproj

@@ -116,6 +116,7 @@
     <Compile Include="SslStreamNegotiatedCipherSuiteTest.cs" />
     <Compile Include="SslStreamCredentialCacheTest.cs" />
     <Compile Include="SslStreamSystemDefaultsTest.cs" />
+    <Compile Include="SslStreamRemoteExecutorTests.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetPlatformIdentifier)' != 'browser'">
     <Compile Include="TelemetryTest.cs" />