mcs/class/Mono.Security.Providers.NewTls/Mono.Security.Providers.NewTls/TlsContextWrapper.cs

   1 //
   2 // TlsContextWrapper.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 extern alias NewSystemSource;
  28
  29 using System;
  30 using System.Security.Cryptography;
  31
  32 using SSCX = System.Security.Cryptography.X509Certificates;
  33 using PSSCX = System.Security.Cryptography.X509Certificates;
  34
  35 using MSI = Mono.Security.Interface;
  36 using MX = Mono.Security.X509;
  37
  38 namespace Mono.Security.Providers.NewTls
  39 {
  40         class TlsContextWrapper : IDisposable, MSI.IMonoTlsContext
  41         {
  42                 ITlsConfiguration config;
  43                 ITlsContext context;
  44                 bool serverMode;
  45
  46                 public TlsContextWrapper (ITlsConfiguration config, bool serverMode)
  47                 {
  48                         this.config = config;
  49                         this.serverMode = serverMode;
  50                 }
  51
  52                 public bool IsServer {
  53                         get { return serverMode; }
  54                 }
  55
  56                 public bool IsValid {
  57                         get { return context != null && context.IsValid; }
  58                 }
  59
  60                 public void Initialize (MSI.IMonoTlsEventSink eventSink)
  61                 {
  62                         if (context != null)
  63                                 throw new InvalidOperationException ();
  64                         context = TlsProviderFactory.CreateTlsContext (config, serverMode, eventSink);
  65                 }
  66
  67                 void Clear ()
  68                 {
  69                         if (context != null) {
  70                                 context.Dispose ();
  71                                 context = null;
  72                         }
  73                 }
  74
  75                 public ITlsConfiguration Configuration {
  76                         get {
  77                                 if (config == null)
  78                                         throw new ObjectDisposedException ("TlsConfiguration");
  79                                 return config;
  80                         }
  81                 }
  82
  83                 public ITlsContext Context {
  84                         get {
  85                                 if (!IsValid)
  86                                         throw new ObjectDisposedException ("TlsContext");
  87                                 return context;
  88                         }
  89                 }
  90
  91                 public bool HasCredentials {
  92                         get { return Configuration.HasCredentials; }
  93                 }
  94
  95                 public void SetCertificate (SSCX.X509Certificate certificate, AsymmetricAlgorithm privateKey)
  96                 {
  97                         var monoCert = new MX.X509Certificate (certificate.GetRawCertData ());
  98                         Configuration.SetCertificate (monoCert, privateKey);
  99                 }
 100
 101                 public int GenerateNextToken (MSI.IBufferOffsetSize incoming, out MSI.IBufferOffsetSize outgoing)
 102                 {
 103                         var input = incoming != null ? new MSI.TlsBuffer (BOSWrapper.Wrap (incoming)) : null;
 104                         var output = new MSI.TlsMultiBuffer ();
 105                         var retval = Context.GenerateNextToken (input, output);
 106                         if (output.IsEmpty)
 107                                 outgoing = null;
 108                         outgoing = BOSWrapper.Wrap (output.StealBuffer ());
 109                         return (int)retval;
 110                 }
 111
 112                 public int EncryptMessage (ref MSI.IBufferOffsetSize incoming)
 113                 {
 114                         var buffer = new MSI.TlsBuffer (BOSWrapper.Wrap (incoming));
 115                         var retval = Context.EncryptMessage (ref buffer);
 116                         incoming = BOSWrapper.Wrap (buffer.GetRemaining ());
 117                         return (int)retval;
 118                 }
 119
 120                 public int DecryptMessage (ref MSI.IBufferOffsetSize incoming)
 121                 {
 122                         var buffer = new MSI.TlsBuffer (BOSWrapper.Wrap (incoming));
 123                         var retval = Context.DecryptMessage (ref buffer);
 124                         incoming = buffer != null ? BOSWrapper.Wrap (buffer.GetRemaining ()) : null;
 125                         return (int)retval;
 126                 }
 127
 128                 class BOSWrapper : MSI.IBufferOffsetSize
 129                 {
 130                         public byte[] Buffer {
 131                                 get;
 132                                 private set;
 133                         }
 134
 135                         public int Offset {
 136                                 get;
 137                                 private set;
 138                         }
 139
 140                         public int Size {
 141                                 get;
 142                                 private set;
 143                         }
 144
 145                         BOSWrapper (byte[] buffer, int offset, int size)
 146                         {
 147                                 Buffer = buffer;
 148                                 Offset = offset;
 149                                 Size = size;
 150                         }
 151
 152                         public static BOSWrapper Wrap (MSI.IBufferOffsetSize bos)
 153                         {
 154                                 return bos != null ? new BOSWrapper (bos.Buffer, bos.Offset, bos.Size) : null;
 155                         }
 156                 }
 157
 158                 public byte[] CreateCloseNotify ()
 159                 {
 160                         return Context.CreateAlert (new MSI.Alert (MSI.AlertLevel.Warning, MSI.AlertDescription.CloseNotify));
 161                 }
 162
 163                 public byte[] CreateHelloRequest ()
 164                 {
 165                         return Context.CreateHelloRequest ();
 166                 }
 167
 168                 public SSCX.X509Certificate GetRemoteCertificate (out PSSCX.X509CertificateCollection remoteCertificateStore)
 169                 {
 170                         MX.X509CertificateCollection monoCollection;
 171                         var remoteCert = Context.GetRemoteCertificate (out monoCollection);
 172                         if (remoteCert == null) {
 173                                 remoteCertificateStore = null;
 174                                 return null;
 175                         }
 176
 177                         remoteCertificateStore = new PSSCX.X509CertificateCollection ();
 178                         foreach (var cert in monoCollection) {
 179                                 remoteCertificateStore.Add (new PSSCX.X509Certificate2 (cert.RawData));
 180                         }
 181                         return new PSSCX.X509Certificate2 (remoteCert.RawData);
 182
 183                 }
 184
 185                 public bool VerifyRemoteCertificate ()
 186                 {
 187                         return Context.VerifyRemoteCertificate ();
 188                 }
 189
 190                 public Exception LastError {
 191                         get {
 192                                 if (context != null)
 193                                         return context.LastError;
 194                                 return null;
 195                         }
 196                 }
 197
 198                 public bool ReceivedCloseNotify {
 199                         get {
 200                                 return Context.ReceivedCloseNotify;
 201                         }
 202                 }
 203
 204                 public MSI.MonoTlsConnectionInfo GetConnectionInfo ()
 205                 {
 206                         return Context.ConnectionInfo;
 207                 }
 208
 209                 public void Dispose ()
 210                 {
 211                         Dispose (true);
 212                         GC.SuppressFinalize (this);
 213                 }
 214
 215                 void Dispose (bool disposing)
 216                 {
 217                         Clear ();
 218                 }
 219         }
 220 }
 221