mcs/class/System/Mono.Net.Security/MonoTlsStream.cs

   1 //
   2 // MonoTlsStream.cs
   3 //
   4 // Author:
   5 //       Martin Baulig <martin.baulig@xamarin.com>
   6 //
   7 // Copyright (c) 2015 Xamarin, Inc.
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a copy
  10 // of this software and associated documentation files (the "Software"), to deal
  11 // in the Software without restriction, including without limitation the rights
  12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13 // copies of the Software, and to permit persons to whom the Software is
  14 // furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25 // THE SOFTWARE.
  26
  27 #if SECURITY_DEP
  28 #if MONO_SECURITY_ALIAS
  29 extern alias MonoSecurity;
  30 #endif
  31
  32 #if MONO_SECURITY_ALIAS
  33 using MonoSecurity::Mono.Security.Interface;
  34 #else
  35 using Mono.Security.Interface;
  36 #endif
  37 #endif
  38
  39 using System;
  40 using System.IO;
  41 using System.Net;
  42 using System.Net.Sockets;
  43 using System.Net.Security;
  44 using System.Threading;
  45 using System.Threading.Tasks;
  46 using System.Security.Authentication;
  47 using System.Security.Cryptography.X509Certificates;
  48 using System.Security.Principal;
  49 using System.Security.Cryptography;
  50
  51 namespace Mono.Net.Security
  52 {
  53         class MonoTlsStream
  54         {
  55 #if SECURITY_DEP
  56                 readonly MonoTlsProvider provider;
  57                 readonly NetworkStream networkStream;
  58                 readonly HttpWebRequest request;
  59
  60                 readonly MonoTlsSettings settings;
  61
  62                 internal HttpWebRequest Request {
  63                         get { return request; }
  64                 }
  65
  66                 IMonoSslStream sslStream;
  67
  68                 internal IMonoSslStream SslStream {
  69                         get { return sslStream; }
  70                 }
  71 #else
  72                 const string EXCEPTION_MESSAGE = "System.Net.Security.SslStream is not supported on the current platform.";
  73 #endif
  74
  75                 WebExceptionStatus status;
  76
  77                 internal WebExceptionStatus ExceptionStatus {
  78                         get { return status; }
  79                 }
  80
  81                 internal bool CertificateValidationFailed {
  82                         get; set;
  83                 }
  84
  85                 public MonoTlsStream (HttpWebRequest request, NetworkStream networkStream)
  86                 {
  87 #if SECURITY_DEP
  88                         this.request = request;
  89                         this.networkStream = networkStream;
  90
  91                         settings = request.TlsSettings;
  92                         provider = request.TlsProvider ?? MonoTlsProviderFactory.GetProviderInternal ();
  93                         status = WebExceptionStatus.SecureChannelFailure;
  94
  95                         ChainValidationHelper.Create (provider, ref settings, this);
  96 #else
  97                         throw new PlatformNotSupportedException (EXCEPTION_MESSAGE);
  98 #endif
  99                 }
 100
 101                 internal Stream CreateStream (byte[] buffer)
 102                 {
 103 #if SECURITY_DEP
 104                         sslStream = provider.CreateSslStream (networkStream, false, settings);
 105
 106                         try {
 107                                 var host = request.Host;
 108                                 if (!string.IsNullOrEmpty (host)) {
 109                                         var pos = host.IndexOf (':');
 110                                         if (pos > 0)
 111                                                 host = host.Substring (0, pos);
 112                                 }
 113
 114                                 sslStream.AuthenticateAsClient (
 115                                         host, request.ClientCertificates,
 116                                         (SslProtocols)ServicePointManager.SecurityProtocol,
 117                                         ServicePointManager.CheckCertificateRevocationList);
 118
 119                                 status = WebExceptionStatus.Success;
 120                         } catch {
 121                                 status = WebExceptionStatus.SecureChannelFailure;
 122                                 throw;
 123                         } finally {
 124                                 if (CertificateValidationFailed)
 125                                         status = WebExceptionStatus.TrustFailure;
 126
 127                                 if (status == WebExceptionStatus.Success)
 128                                         request.ServicePoint.UpdateClientCertificate (sslStream.InternalLocalCertificate);
 129                                 else {
 130                                         request.ServicePoint.UpdateClientCertificate (null);
 131                                         sslStream = null;
 132                                 }
 133                         }
 134
 135                         try {
 136                                 if (buffer != null)
 137                                         sslStream.Write (buffer, 0, buffer.Length);
 138                         } catch {
 139                                 status = WebExceptionStatus.SendFailure;
 140                                 sslStream = null;
 141                                 throw;
 142                         }
 143
 144                         return sslStream.AuthenticatedStream;
 145 #else
 146                         throw new PlatformNotSupportedException (EXCEPTION_MESSAGE);
 147 #endif
 148                 }
 149         }
 150 }