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

   1 //
   2 // MonoTlsProviderFactory.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 using MSI = MonoSecurity::Mono.Security.Interface;
  31 using MX = MonoSecurity::Mono.Security.X509;
  32 #else
  33 using MSI = Mono.Security.Interface;
  34 using MX = Mono.Security.X509;
  35 #endif
  36 using System.Security.Cryptography.X509Certificates;
  37 #endif
  38
  39 using System;
  40 using System.Net;
  41
  42 namespace Mono.Net.Security
  43 {
  44         /*
  45          * Keep in sync with Mono.Security/Mono.Security.Interface/MonoTlsProvider.cs.
  46          *
  47          */
  48         static class MonoTlsProviderFactory
  49         {
  50                 #region Internal API
  51
  52                 /*
  53                  * APIs in this section are for consumption within System.dll only - do not access via
  54                  * reflection or from friend assemblies.
  55                  *
  56                  * @IMonoTlsProvider is defined as empty interface outside 'SECURITY_DEP', so we don't need
  57                  * this conditional here.
  58                  */
  59
  60                 internal static IMonoTlsProvider GetProviderInternal ()
  61                 {
  62                         lock (locker) {
  63                                 if (currentProvider != null)
  64                                         return currentProvider;
  65
  66                                 try {
  67                                         defaultProvider = CreateDefaultProvider ();
  68                                 } catch (Exception ex) {
  69                                         throw new NotSupportedException ("TLS Support not available.", ex);
  70                                 }
  71
  72                                 if (defaultProvider == null)
  73                                         throw new NotSupportedException ("TLS Support not available.");
  74
  75                                 currentProvider = defaultProvider;
  76                                 return currentProvider;
  77                         }
  78                 }
  79
  80                 internal static IMonoTlsProvider GetDefaultProviderInternal ()
  81                 {
  82                         lock (locker) {
  83                                 if (defaultProvider != null)
  84                                         return defaultProvider;
  85
  86                                 try {
  87                                         defaultProvider = CreateDefaultProvider ();
  88                                 } catch (Exception ex) {
  89                                         throw new NotSupportedException ("TLS Support not available.", ex);
  90                                 }
  91
  92                                 if (defaultProvider == null)
  93                                         throw new NotSupportedException ("TLS Support not available.");
  94
  95                                 return defaultProvider;
  96                         }
  97                 }
  98
  99                 static IMonoTlsProvider CreateDefaultProvider ()
 100                 {
 101 #if SECURITY_DEP
 102 #if MONO_FEATURE_NEW_SYSTEM_SOURCE
 103                         /*
 104                          * This is a hack, which is used in the Mono.Security.Providers.NewSystemSource
 105                          * assembly, which will provide a "fake" System.dll.  Use the public Mono.Security
 106                          * API to get the "real" System.dll's provider via reflection, then wrap it with
 107                          * the "fake" version's perceived view.
 108                          *
 109                          * NewSystemSource needs to compile MonoTlsProviderFactory.cs, IMonoTlsProvider.cs,
 110                          * MonoTlsProviderWrapper.cs and CallbackHelpers.cs from this directory and only these.
 111                          */
 112                         var userProvider = MSI.MonoTlsProviderFactory.GetProvider ();
 113                         return new Private.MonoTlsProviderWrapper (userProvider);
 114 #else
 115                         return new Private.MonoDefaultTlsProvider ();
 116 #endif
 117 #else
 118                         return null;
 119 #endif
 120                 }
 121
 122                 static object locker = new object ();
 123                 static IMonoTlsProvider defaultProvider;
 124                 static IMonoTlsProvider currentProvider;
 125
 126                 #endregion
 127
 128 #if SECURITY_DEP && !MONO_FEATURE_NEW_SYSTEM_SOURCE
 129
 130                 #region Mono.Security visible API
 131
 132                 /*
 133                  * "Public" section, intended to be consumed via reflection.
 134                  *
 135                  * Mono.Security.dll provides a public wrapper around these.
 136                  */
 137
 138                 internal static MSI.MonoTlsProvider GetProvider ()
 139                 {
 140                         var provider = GetProviderInternal ();
 141                         if (provider == null)
 142                                 throw new NotSupportedException ("No TLS Provider available.");
 143
 144                         return provider.Provider;
 145                 }
 146
 147                 internal static MSI.MonoTlsProvider GetDefaultProvider ()
 148                 {
 149                         var provider = GetDefaultProviderInternal ();
 150                         if (provider == null)
 151                                 throw new NotSupportedException ("No TLS Provider available.");
 152
 153                         return provider.Provider;
 154                 }
 155
 156                 internal static bool HasProvider {
 157                         get {
 158                                 lock (locker) {
 159                                         return currentProvider != null;
 160                                 }
 161                         }
 162                 }
 163
 164                 internal static void InstallProvider (MSI.MonoTlsProvider provider)
 165                 {
 166                         lock (locker) {
 167                                 currentProvider = new Private.MonoTlsProviderWrapper (provider);
 168                         }
 169                 }
 170
 171                 internal static HttpWebRequest CreateHttpsRequest (Uri requestUri, MSI.MonoTlsProvider provider, MSI.MonoTlsSettings settings)
 172                 {
 173                         lock (locker) {
 174                                 var internalProvider = provider != null ? new Private.MonoTlsProviderWrapper (provider) : null;
 175                                 return new HttpWebRequest (requestUri, internalProvider, settings);
 176                         }
 177                 }
 178
 179                 internal static HttpListener CreateHttpListener (X509Certificate2 certificate, MSI.MonoTlsProvider provider, MSI.MonoTlsSettings settings)
 180                 {
 181                         lock (locker) {
 182                                 var internalProvider = provider != null ? new Private.MonoTlsProviderWrapper (provider) : null;
 183                                 return new HttpListener (certificate, internalProvider, settings);
 184                         }
 185                 }
 186                 #endregion
 187
 188 #endif
 189
 190         }
 191 }
 192