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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;
namespace Thrift.Transport.Client
{
//TODO: check for correct work
// ReSharper disable once InconsistentNaming
public class TTlsSocketTransport : TStreamTransport
{
private readonly X509Certificate2 _certificate;
private readonly RemoteCertificateValidationCallback _certValidator;
private readonly IPAddress _host;
private readonly bool _isServer;
private readonly LocalCertificateSelectionCallback _localCertificateSelectionCallback;
private readonly int _port;
private readonly SslProtocols _sslProtocols;
private TcpClient _client;
private SslStream _secureStream;
private int _timeout;
public TTlsSocketTransport(TcpClient client, X509Certificate2 certificate, bool isServer = false,
RemoteCertificateValidationCallback certValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
{
_client = client;
_certificate = certificate;
_certValidator = certValidator;
_localCertificateSelectionCallback = localCertificateSelectionCallback;
_sslProtocols = sslProtocols;
_isServer = isServer;
if (isServer && certificate == null)
{
throw new ArgumentException("TTlsSocketTransport needs certificate to be used for server",
nameof(certificate));
}
if (IsOpen)
{
InputStream = client.GetStream();
OutputStream = client.GetStream();
}
}
public TTlsSocketTransport(IPAddress host, int port, string certificatePath,
RemoteCertificateValidationCallback certValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
: this(host, port, 0,
new X509Certificate2(certificatePath),
certValidator,
localCertificateSelectionCallback,
sslProtocols)
{
}
public TTlsSocketTransport(IPAddress host, int port,
X509Certificate2 certificate = null,
RemoteCertificateValidationCallback certValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
: this(host, port, 0,
certificate,
certValidator,
localCertificateSelectionCallback,
sslProtocols)
{
}
public TTlsSocketTransport(IPAddress host, int port, int timeout,
X509Certificate2 certificate,
RemoteCertificateValidationCallback certValidator = null,
LocalCertificateSelectionCallback localCertificateSelectionCallback = null,
SslProtocols sslProtocols = SslProtocols.Tls12)
{
_host = host;
_port = port;
_timeout = timeout;
_certificate = certificate;
_certValidator = certValidator;
_localCertificateSelectionCallback = localCertificateSelectionCallback;
_sslProtocols = sslProtocols;
InitSocket();
}
public int Timeout
{
set { _client.ReceiveTimeout = _client.SendTimeout = _timeout = value; }
}
public TcpClient TcpClient => _client;
public IPAddress Host => _host;
public int Port => _port;
public override bool IsOpen
{
get
{
if (_client == null)
{
return false;
}
return _client.Connected;
}
}
private void InitSocket()
{
_client = new TcpClient();
_client.ReceiveTimeout = _client.SendTimeout = _timeout;
_client.Client.NoDelay = true;
}
private bool DefaultCertificateValidator(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors sslValidationErrors)
{
return sslValidationErrors == SslPolicyErrors.None;
}
public override async Task OpenAsync(CancellationToken cancellationToken)
{
if (IsOpen)
{
throw new TTransportException(TTransportException.ExceptionType.AlreadyOpen, "Socket already connected");
}
if (_host == null)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen, "Cannot open null host");
}
if (_port <= 0)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen, "Cannot open without port");
}
if (_client == null)
{
InitSocket();
}
if (_client != null)
{
await _client.ConnectAsync(_host, _port);
await SetupTlsAsync();
}
}
public async Task SetupTlsAsync()
{
var validator = _certValidator ?? DefaultCertificateValidator;
if (_localCertificateSelectionCallback != null)
{
_secureStream = new SslStream(_client.GetStream(), false, validator, _localCertificateSelectionCallback);
}
else
{
_secureStream = new SslStream(_client.GetStream(), false, validator);
}
try
{
if (_isServer)
{
// Server authentication
await
_secureStream.AuthenticateAsServerAsync(_certificate, _certValidator != null, _sslProtocols,
true);
}
else
{
// Client authentication
var certs = _certificate != null
? new X509CertificateCollection {_certificate}
: new X509CertificateCollection();
var targetHost = _host.ToString();
await _secureStream.AuthenticateAsClientAsync(targetHost, certs, _sslProtocols, true);
}
}
catch (Exception)
{
Close();
throw;
}
InputStream = _secureStream;
OutputStream = _secureStream;
}
public override void Close()
{
base.Close();
if (_client != null)
{
_client.Dispose();
_client = null;
}
if (_secureStream != null)
{
_secureStream.Dispose();
_secureStream = null;
}
}
}
}
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