TlsStream.cs

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using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
 
namespace System.Net;
 
internal sealed class TlsStream : NetworkStream
{
    private readonly SslStream _sslStream;
 
    private readonly string _host;
 
    private readonly X509CertificateCollection _clientCertificates;
 
    public TlsStream(NetworkStream stream, Socket socket, string host, X509CertificateCollection clientCertificates)
        : base(socket)
    {
        _sslStream = new SslStream(stream, leaveInnerStreamOpen: false, ServicePointManager.ServerCertificateValidationCallback);
        _host = host;
        _clientCertificates = clientCertificates;
    }
 
    public void AuthenticateAsClient()
    {
        _sslStream.AuthenticateAsClient(_host, _clientCertificates, (SslProtocols)ServicePointManager.SecurityProtocol, ServicePointManager.CheckCertificateRevocationList);
    }
 
    public IAsyncResult BeginAuthenticateAsClient(AsyncCallback asyncCallback, object state)
    {
        return _sslStream.BeginAuthenticateAsClient(_host, _clientCertificates, (SslProtocols)ServicePointManager.SecurityProtocol, ServicePointManager.CheckCertificateRevocationList, asyncCallback, state);
    }
 
    public void EndAuthenticateAsClient(IAsyncResult asyncResult)
    {
        _sslStream.EndAuthenticateAsClient(asyncResult);
    }
 
    public override IAsyncResult BeginWrite(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
    {
        return _sslStream.BeginWrite(buffer, offset, size, callback, state);
    }
 
    public override void EndWrite(IAsyncResult result)
    {
        _sslStream.EndWrite(result);
    }
 
    public override void Write(byte[] buffer, int offset, int size)
    {
        _sslStream.Write(buffer, offset, size);
    }
 
    public override int Read(byte[] buffer, int offset, int size)
    {
        return _sslStream.Read(buffer, offset, size);
    }
 
    public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
    {
        return _sslStream.BeginRead(buffer, offset, count, callback, state);
    }
 
    public override int EndRead(IAsyncResult asyncResult)
    {
        return _sslStream.EndRead(asyncResult);
    }
 
    public override void Close()
    {
        base.Close();
        if (_sslStream != null)
        {
            _sslStream.Close();
        }
    }
}