public async Task CanReplaceClusterCert()
        {
            var clusterSize  = 3;
            var databaseName = GetDatabaseName();
            var leader       = await CreateRaftClusterAndGetLeader(clusterSize, false, useSsl : true);

            X509Certificate2 adminCertificate = null;

            adminCertificate = AskServerForClientCertificate(_selfSignedCertFileName, new Dictionary <string, DatabaseAccess>(), SecurityClearance.ClusterAdmin, server: leader);

            DatabasePutResult databaseResult;

            using (var store = new DocumentStore
            {
                Urls = new[] { leader.WebUrl },
                Database = databaseName,
                Certificate = adminCertificate,
                Conventions =
                {
                    DisableTopologyUpdates = true
                }
            }.Initialize())
            {
                var doc = new DatabaseRecord(databaseName);
                databaseResult = await store.Maintenance.Server.SendAsync(new CreateDatabaseOperation(doc, clusterSize));
            }
            Assert.Equal(clusterSize, databaseResult.Topology.AllNodes.Count());
            foreach (var server in Servers)
            {
                await server.ServerStore.Cluster.WaitForIndexNotification(databaseResult.RaftCommandIndex);
            }
            foreach (var server in Servers.Where(s => databaseResult.NodesAddedTo.Any(n => n == s.WebUrl)))
            {
                await server.ServerStore.DatabasesLandlord.TryGetOrCreateResourceStore(databaseName);
            }

            using (var store = new DocumentStore()
            {
                Urls = new[] { databaseResult.NodesAddedTo[0] },
                Database = databaseName,
                Certificate = adminCertificate,
                Conventions =
                {
                    DisableTopologyUpdates = true
                }
            }.Initialize())
            {
                using (var session = store.OpenAsyncSession())
                {
                    await session.StoreAsync(new User { Name = "Karmelush" }, "users/1");

                    await session.SaveChangesAsync();
                }

                var certBytes     = CertificateUtils.CreateSelfSignedCertificate(Environment.MachineName, "RavenTestsServerReplacementCert");
                var newServerCert = new X509Certificate2(certBytes, (string)null, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.MachineKeySet);

                var mre = new ManualResetEventSlim();

                leader.ServerCertificateChanged += (sender, args) => mre.Set();

                var requestExecutor = store.GetRequestExecutor();
                using (requestExecutor.ContextPool.AllocateOperationContext(out JsonOperationContext context))
                {
                    var command = new ReplaceClusterCertificateOperation("Replacement Server Cert", certBytes, false)
                                  .GetCommand(store.Conventions, context);

                    requestExecutor.Execute(command, context);
                }

                Assert.True(mre.Wait(5000));

                Assert.True(leader.Certificate.Certificate.Thumbprint.Equals(newServerCert.Thumbprint));

                using (var session = store.OpenSession())
                {
                    var user1 = session.Load <User>("users/1");
                    Assert.NotNull(user1);
                    Assert.Equal("Karmelush", user1.Name);
                }
            }
        }
        public async Task WillNotTrustNewClientCertIfPublicKeyPinningHashIsDifferent()
        {
            // Setting up two clusters with external replication cluster1 --> cluster2
            var clusterSize  = 1;
            var databaseName = GetDatabaseName();

            // We generate the first certificate before calling CreateRaftClusterAndGetLeader so that the two clusters will have separate certificates
            var cluster1CertBytes    = CertificateUtils.CreateSelfSignedTestCertificate(Environment.MachineName, "RavenTests");
            var cluster1CertFileName = GetTempFileName();

            File.WriteAllBytes(cluster1CertFileName, cluster1CertBytes);

            var leader1 = await CreateRaftClusterAndGetLeader(clusterSize, false, useSsl : true, serverCertPath : cluster1CertFileName);

            var cluster1Cert      = new X509Certificate2(cluster1CertFileName);
            var adminCertificate1 = AskServerForClientCertificate(cluster1CertFileName, new Dictionary <string, DatabaseAccess>(), SecurityClearance.ClusterAdmin, server: leader1);

            await CreateDatabaseInCluster(databaseName, clusterSize, leader1.WebUrl, adminCertificate1);

            // Cluster 2 gets a normal test certificate
            var leader2 = await CreateRaftClusterAndGetLeader(clusterSize, false, useSsl : true);

            var cluster2Cert      = new X509Certificate2(_selfSignedCertFileName);
            var adminCertificate2 = AskServerForClientCertificate(_selfSignedCertFileName, new Dictionary <string, DatabaseAccess>(), SecurityClearance.ClusterAdmin, server: leader2);

            await CreateDatabaseInCluster(databaseName, clusterSize, leader2.WebUrl, adminCertificate2);

            // This will register cluster 1's cert as a user cert in cluster 2
            AskCluster2ToTrustCluster1(cluster1Cert, cluster2Cert, new Dictionary <string, DatabaseAccess>
            {
                [databaseName] = DatabaseAccess.ReadWrite
            }, SecurityClearance.ValidUser, leader2);

            // First we'll make sure external replication works between the two clusters
            using (var store1 = new DocumentStore
            {
                Urls = new[] { leader1.WebUrl },
                Database = databaseName,
                Certificate = adminCertificate1
            }.Initialize())
                using (var store2 = new DocumentStore
                {
                    Urls = new[] { leader2.WebUrl },
                    Database = databaseName,
                    Certificate = adminCertificate2
                }.Initialize())
                {
                    var externalList = await SetupReplicationAsync((DocumentStore)store1, (DocumentStore)store2);

                    using (var session = store1.OpenAsyncSession())
                    {
                        await session.StoreAsync(new User { Name = "Karmelush" }, "users/1");

                        await session.SaveChangesAsync();
                    }

                    var replicated1 = WaitForDocumentToReplicate <User>(store2, "users/1", 10000);
                    Assert.NotNull(replicated1);
                    Assert.Equal("Karmelush", replicated1.Name);

                    // Let's replace the certificate in cluster 1 (new cert has different private key) and make sure cluster 2 WILL NOT trusts cluster 1.
                    var certBytes = CertificateUtils.CreateSelfSignedTestCertificate(Environment.MachineName, "ReplacementCertDifferentKey");
                    var cluster1ReplacementCert = new X509Certificate2(certBytes);

                    var mre = new ManualResetEventSlim();

                    leader1.ServerCertificateChanged += (sender, args) => mre.Set();

                    var requestExecutor = store1.GetRequestExecutor();
                    using (requestExecutor.ContextPool.AllocateOperationContext(out JsonOperationContext context))
                    {
                        var command = new ReplaceClusterCertificateOperation(certBytes, false)
                                      .GetCommand(store1.Conventions, context);

                        requestExecutor.Execute(command, context);
                    }

                    Assert.True(mre.Wait(Debugger.IsAttached ? TimeSpan.FromMinutes(10) : TimeSpan.FromMinutes(2)), "Waited too long");
                    Assert.NotNull(leader1.Certificate.Certificate.Thumbprint);
                    Assert.True(leader1.Certificate.Certificate.Thumbprint.Equals(cluster1ReplacementCert.Thumbprint), "New cert is identical");

                    // Disable external replication
                    var external = new ExternalReplication(store1.Database, $"ConnectionString-{store2.Identifier}")
                    {
                        TaskId   = externalList.First().TaskId,
                        Disabled = true
                    };

                    var responsibleNode = externalList[0].ResponsibleNode;

                    var clusterNodes1 = Servers.Where(s => s.ServerStore.GetClusterTopology().TryGetNodeTagByUrl(leader1.WebUrl).HasUrl);
                    var node          = clusterNodes1.Single(n => n.ServerStore.NodeTag == responsibleNode);

                    var db1 = await node.ServerStore.DatabasesLandlord.TryGetOrCreateResourceStore(store1.Database);

                    Assert.NotNull(db1);
                    var replicationConnection = db1.ReplicationLoader.OutgoingHandlers.Single(x => x.Destination is ExternalReplication);
                    var res = await store1.Maintenance.SendAsync(new UpdateExternalReplicationOperation(external));

                    Assert.Equal(externalList.First().TaskId, res.TaskId);

                    // Make sure the command is processed
                    await db1.ServerStore.Cluster.WaitForIndexNotification(res.RaftCommandIndex);

                    var connectionDropped = await WaitForValueAsync(() => replicationConnection.IsConnectionDisposed, true);

                    Assert.True(connectionDropped);

                    // Enable external replication
                    external.Disabled = false;
                    res = await store1.Maintenance.SendAsync(new UpdateExternalReplicationOperation(external));

                    await db1.ServerStore.Cluster.WaitForIndexNotification(res.RaftCommandIndex);

                    Assert.Equal(externalList.First().TaskId, res.TaskId);

                    using (var session = store1.OpenAsyncSession())
                    {
                        await session.StoreAsync(new User { Name = "Avivush" }, "users/2").ConfigureAwait(false);

                        await session.SaveChangesAsync();
                    }

                    //WaitForUserToContinueTheTest(store1, clientCert: adminCertificate1);
                    // WaitForUserToContinueTheTest(store2, clientCert: adminCertificate2);

                    var replicated = WaitForDocumentToReplicate <User>(store2, "users/2", 10000);
                    Assert.Null(replicated);

                    // RavenDB-13010
                    Assert.True(WaitForValue(() =>
                    {
                        var repStats = store1.Maintenance.Send(new GetReplicationPerformanceStatisticsOperation());
                        return(repStats.Outgoing.SelectMany(x => x.Performance).Count(x => x.Errors.Count > 0) > 0);
                    }, true));
                }
        }