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//
// MonoTlsStream.cs
//
// Author:
// Martin Baulig <martin.baulig@xamarin.com>
//
// Copyright (c) 2015 Xamarin, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#if SECURITY_DEP
#if MONO_SECURITY_ALIAS
extern alias MonoSecurity;
#endif
#if MONO_SECURITY_ALIAS
using MonoSecurity::Mono.Security.Interface;
#else
using Mono.Security.Interface;
#endif
#endif
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Net.Security;
using System.Threading;
using System.Threading.Tasks;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Security.Principal;
using System.Security.Cryptography;
namespace Mono.Net.Security
{
class MonoTlsStream : IDisposable
{
#if SECURITY_DEP
readonly MobileTlsProvider provider;
readonly NetworkStream networkStream;
readonly HttpWebRequest request;
readonly MonoTlsSettings settings;
internal HttpWebRequest Request {
get { return request; }
}
SslStream sslStream;
readonly object sslStreamLock = new object ();
internal SslStream SslStream {
get { return sslStream; }
}
#else
const string EXCEPTION_MESSAGE = "System.Net.Security.SslStream is not supported on the current platform.";
#endif
WebExceptionStatus status;
internal WebExceptionStatus ExceptionStatus {
get { return status; }
}
internal bool CertificateValidationFailed {
get; set;
}
public MonoTlsStream (HttpWebRequest request, NetworkStream networkStream)
{
#if SECURITY_DEP
this.request = request;
this.networkStream = networkStream;
settings = request.TlsSettings;
provider = request.TlsProvider ?? MonoTlsProviderFactory.GetProviderInternal ();
status = WebExceptionStatus.SecureChannelFailure;
ChainValidationHelper.Create (provider, ref settings, this);
#else
status = WebExceptionStatus.SecureChannelFailure;
throw new PlatformNotSupportedException (EXCEPTION_MESSAGE);
#endif
}
internal async Task<Stream> CreateStream (WebConnectionTunnel tunnel, CancellationToken cancellationToken)
{
#if SECURITY_DEP
var socket = networkStream.InternalSocket;
WebConnection.Debug ($"MONO TLS STREAM CREATE STREAM: {socket.ID}");
sslStream = new SslStream (networkStream, false, provider, settings);
try {
var host = request.Host;
if (!string.IsNullOrEmpty (host)) {
var pos = host.IndexOf (':');
if (pos > 0)
host = host.Substring (0, pos);
}
await sslStream.AuthenticateAsClientAsync (
host, request.ClientCertificates,
(SslProtocols)ServicePointManager.SecurityProtocol,
ServicePointManager.CheckCertificateRevocationList).ConfigureAwait (false);
status = WebExceptionStatus.Success;
request.ServicePoint.UpdateClientCertificate (sslStream.LocalCertificate);
} catch (Exception ex) {
WebConnection.Debug ($"MONO TLS STREAM ERROR: {socket.ID} {socket.CleanedUp} {ex.Message}");
if (socket.CleanedUp)
status = WebExceptionStatus.RequestCanceled;
else if (CertificateValidationFailed)
status = WebExceptionStatus.TrustFailure;
else
status = WebExceptionStatus.SecureChannelFailure;
request.ServicePoint.UpdateClientCertificate (null);
CloseSslStream ();
throw;
}
try {
if (tunnel?.Data != null)
await sslStream.WriteAsync (tunnel.Data, 0, tunnel.Data.Length, cancellationToken).ConfigureAwait (false);
} catch {
status = WebExceptionStatus.SendFailure;
CloseSslStream ();
throw;
}
return sslStream;
#else
throw new PlatformNotSupportedException (EXCEPTION_MESSAGE);
#endif
}
public void Dispose ()
{
CloseSslStream ();
}
void CloseSslStream () {
lock (sslStreamLock) {
if (sslStream != null) {
sslStream.Dispose ();
sslStream = null;
}
}
}
}
}
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