Tests: introduce HS compat test with TOR client

Upgrade to .NET 6 was necessary to be able
to use SocksV5 (which is what tor gives us)
as proxy for HttpClient.

Author: aarani

.github/workflows/CI.yml

@@ -10,14 +10,22 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
-      - name: Setup .NET Core SDK 3.1.x
+      - name: Setup .NET SDK 6.0.x
         uses: actions/[email protected]
         with:
-          dotnet-version: '3.1.x'
+          dotnet-version: '6.0.x'
       - name: Install dependencies
         run: dotnet restore
       - name: Build
         run: dotnet build --configuration Release --no-restore
+      # Please keep in mind that NOnion DOES NOT require tor client to function
+      # tor client is only installed here for testing purposes.
+      - name: Install Tor and wait for startup
+        run: |
+          sudo apt install tor
+          echo -e "SOCKSPort 127.0.0.1:9050" | sudo tee -a /etc/tor/torrc
+          sudo systemctl restart tor
+          sleep 2m
       - name: Test
         run: dotnet test --no-restore --verbosity normal
 
@@ -31,10 +39,10 @@ jobs:
           submodules: recursive
           # needed because of commit-lint, see https://github.com/conventional-changelog/commitlint/issues/3376
           fetch-depth: 0
-      - name: Setup .NET SDK 5.0.x
+      - name: Setup .NET SDK 6.0.x
         uses: actions/[email protected]
         with:
-          dotnet-version: '5.0.x'
+          dotnet-version: '6.0.x'
       - name: Install dependencies
         run: dotnet restore
       - name: Build
@@ -84,10 +92,10 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
-      - name: Setup .NET Core SDK 3.1.x
+      - name: Setup .NET SDK 6.0.x
         uses: actions/[email protected]
         with:
-          dotnet-version: '3.1.x'
+          dotnet-version: '6.0.x'
       - name: Install dependencies
         run: dotnet restore
       - name: Build

NOnion.Tests/HiddenServicesTests.cs

@@ -2,7 +2,10 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Net;
+using System.Net.Http;
 using System.Security.Cryptography;
+using System.Text;
 using System.Threading.Tasks;
 
 using NUnit.Framework;
@@ -162,6 +165,78 @@ public void CanEstablishAndCommunicateOverHSConnectionOnionStyle()
         {
             Assert.DoesNotThrowAsync(EstablishAndCommunicateOverHSConnectionOnionStyle);
         }
+
+        [Test]
+        [Retry(TestsRetryCount)]
+        public void CanConnectToHiddenServiceUsingTorClient()
+        {
+            Assert.DoesNotThrowAsync(ConnectToHiddenServiceUsingTorClient);
+        }
+
+        private async Task ConnectToHiddenServiceUsingTorClient()
+        {
+            int descriptorUploadRetryLimit = 2;
+
+            TorDirectory directory = await TorDirectory.BootstrapAsync(FallbackDirectorySelector.GetRandomFallbackDirectory(), new DirectoryInfo(Path.GetTempPath()));
+
+            TorLogger.Log("Finished bootstraping");
+
+            SecureRandom random = new SecureRandom();
+            Ed25519KeyPairGenerator kpGen = new Ed25519KeyPairGenerator();
+            kpGen.Init(new Ed25519KeyGenerationParameters(random));
+            Ed25519PrivateKeyParameters masterPrivateKey = (Ed25519PrivateKeyParameters)kpGen.GenerateKeyPair().Private;
+
+            TorServiceHost host = new TorServiceHost(directory, descriptorUploadRetryLimit, TestsRetryCount, FSharpOption<Ed25519PrivateKeyParameters>.Some(masterPrivateKey));
+            await host.StartAsync();
+
+            TorLogger.Log("Finished starting HS host");
+
+            var stringToSendAndReceive =
+                "We are using tor!";
+
+            var serverSide =
+                Task.Run(async () => {
+                    var stream = await host.AcceptClientAsync();
+
+                    var httpResponse =
+                        "HTTP/1.1 200 OK\r\n" +
+                        "Server: NOnion\r\n" +
+                        $"Content-Length: {stringToSendAndReceive.Length}\r\n" +
+                        "Connection: close\r\n" +
+                        "Content-Type: text/plain" +
+                        "\r\n" +
+                        "\r\n" +
+                        stringToSendAndReceive +
+                        "\r\n";
+
+                    await stream.SendDataAsync(Encoding.ASCII.GetBytes(httpResponse));
+                    await stream.EndAsync();
+                });
+
+            var clientSide =
+                Task.Run(async () => {
+                    var handler = new HttpClientHandler
+                    {
+                        Proxy = new WebProxy(new Uri("socks5://localhost:9050"))
+                    };
+
+                    TestContext.Progress.WriteLine("Trying to connect to hidden service...");
+                    using (handler)
+                    using (var httpClient = new HttpClient(handler))
+                    {
+                        // Sometimes tor client takes a while to bootstrap and stalls
+                        // the request.
+                        httpClient.Timeout = TimeSpan.FromMinutes(20);
+                        var result = await httpClient.GetStringAsync("http://" + host.ExportUrl());
+                        Assert.AreEqual(result, stringToSendAndReceive);
+                    }
+                }
+            );
+
+            await TaskUtils.WhenAllFailFast(serverSide, clientSide);
+
+            ((IDisposable)host).Dispose();
+        }
     }
 }
 

NOnion.Tests/NOnion.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>