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