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// Licensed to the Apache Software Foundation(ASF) under one
// or more contributor license agreements.See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
using System;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Threading;
using System.Threading.Tasks;
using Thrift.Transport.Client;
namespace Thrift.Transport.Server
{
// ReSharper disable once InconsistentNaming
public class TTlsServerSocketTransport : TServerTransport
{
private readonly RemoteCertificateValidationCallback _clientCertValidator;
private readonly int _clientTimeout = 0;
private readonly LocalCertificateSelectionCallback _localCertificateSelectionCallback;
private readonly X509Certificate2 _serverCertificate;
private readonly SslProtocols _sslProtocols;
private TcpListener _server;
public TTlsServerSocketTransport(
TcpListener listener,
TConfiguration config,
X509Certificate2 certificate,
RemoteCertificateValidationCallback clientCertValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
: base(config)
{
if (!certificate.HasPrivateKey)
{
throw new TTransportException(TTransportException.ExceptionType.Unknown,
"Your server-certificate needs to have a private key");
}
_serverCertificate = certificate;
_clientCertValidator = clientCertValidator;
_localCertificateSelectionCallback = localCertificateSelectionCallback;
_sslProtocols = sslProtocols;
_server = listener;
}
public TTlsServerSocketTransport(
int port,
TConfiguration config,
X509Certificate2 certificate,
RemoteCertificateValidationCallback clientCertValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
: this(null, config, certificate, clientCertValidator, localCertificateSelectionCallback, sslProtocols)
{
try
{
// Create server socket
_server = new TcpListener(IPAddress.Any, port);
_server.Server.NoDelay = true;
}
catch (Exception)
{
_server = null;
throw new TTransportException($"Could not create ServerSocket on port {port}.");
}
}
public override bool IsOpen()
{
return (_server != null)
&& (_server.Server != null)
&& _server.Server.IsBound;
}
public int GetPort()
{
if ((_server != null) && (_server.Server != null) && (_server.Server.LocalEndPoint != null))
{
if (_server.Server.LocalEndPoint is IPEndPoint server)
{
return server.Port;
}
else
{
throw new TTransportException("ServerSocket is not a network socket");
}
}
else
{
throw new TTransportException("ServerSocket is not open");
}
}
public override void Listen()
{
// Make sure accept is not blocking
if (_server != null)
{
try
{
_server.Start();
}
catch (SocketException sx)
{
throw new TTransportException($"Could not accept on listening socket: {sx.Message}");
}
}
}
public override bool IsClientPending()
{
return _server.Pending();
}
protected override async ValueTask<TTransport> AcceptImplementationAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (_server == null)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen, "No underlying server socket.");
}
try
{
var client = await _server.AcceptTcpClientAsync();
client.SendTimeout = client.ReceiveTimeout = _clientTimeout;
//wrap the client in an SSL Socket passing in the SSL cert
var tTlsSocket = new TTlsSocketTransport(
client, Configuration,
_serverCertificate, true, _clientCertValidator,
_localCertificateSelectionCallback, _sslProtocols);
await tTlsSocket.SetupTlsAsync();
return tTlsSocket;
}
catch (Exception ex)
{
throw new TTransportException(ex.ToString());
}
}
public override void Close()
{
if (_server != null)
{
try
{
_server.Stop();
}
catch (Exception ex)
{
throw new TTransportException($"WARNING: Could not close server socket: {ex}");
}
_server = null;
}
}
}
}
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