Improve CamundaCloudTokenProvider to work with SM

Client.IntegrationTests/Client.IntegrationTests.csproj

@@ -32,6 +32,15 @@
     <None Update="Resources\dinnerDecisions.dmn">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Update="Resources\Broker\chain.cert.pem">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="Resources\Broker\private.key.pem">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="Resources\server.crt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
   <ItemGroup>

Client.IntegrationTests/OAuthIntegrationTest.cs

@@ -0,0 +1,48 @@
+using System.Threading.Tasks;
+using Grpc.Core;
+using NUnit.Framework;
+
+namespace Client.IntegrationTests;
+
+[TestFixture]
+public class OAuthIntegrationTest
+{
+    private readonly ZeebeIntegrationTestHelper testHelper = ZeebeIntegrationTestHelper.Latest().WithIdentity();
+
+    [OneTimeSetUp]
+    public async Task Setup()
+    {
+        await testHelper.SetupIntegrationTest();
+    }
+
+    [OneTimeTearDown]
+    public async Task Stop()
+    {
+        await testHelper.TearDownIntegrationTest();
+    }
+
+    [Test]
+    public async Task ShouldSendRequestAndNotFailingWithAuthenticatedClient()
+    {
+        var authenticatedZeebeClient = testHelper.CreateAuthenticatedZeebeClient();
+        var topology = await authenticatedZeebeClient.TopologyRequest().Send();
+        var gatewayVersion = topology.GatewayVersion;
+        Assert.AreEqual(ZeebeIntegrationTestHelper.LatestVersion, gatewayVersion);
+
+        var topologyBrokers = topology.Brokers;
+        Assert.AreEqual(1, topologyBrokers.Count);
+
+        var topologyBroker = topologyBrokers[0];
+        Assert.AreEqual(0, topologyBroker.NodeId);
+    }
+
+    [Test]
+    public Task ShouldFailWithUnauthenticatedClient()
+    {
+        Assert.ThrowsAsync<RpcException>(code: async () =>
+        {
+            await testHelper.CreateZeebeClient().TopologyRequest().Send();
+        });
+        return Task.CompletedTask;
+    }
+}

Client.IntegrationTests/Resources/Broker/chain.cert.pem

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDtDCCApygAwIBAgIUPlH7wI1Bq6F7k63ZNtSXR0DgjxwwDQYJKoZIhvcNAQEL
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+KxaCNRcTKljnM9QazGG8scqJaPjGDteDYBzh63+XbdPhjzWK8/yFIA==
+-----END CERTIFICATE-----

Client.IntegrationTests/Resources/Broker/private.key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDQAtjp2EKKHuVv
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+bNGJygSW2596II+xg/TRPhnF
+-----END PRIVATE KEY-----

Client.IntegrationTests/Resources/server.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDSzCCAjMCFBDDfC44PsguTshkcc2CVESnk/UyMA0GCSqGSIb3DQEBCwUAMGIx
+CzAJBgNVBAYTAkRFMRAwDgYDVQQIDAdHZXJtYW55MQ8wDQYDVQQHDAZCZXJsaW4x
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+-----END CERTIFICATE-----