mcs/class/Mono.Security/Mono.Security.Protocol.Tls.Handshake.Client/TlsClientFinished.cs

   1 // Transport Security Layer (TLS)
   2 // Copyright (c) 2003-2004 Carlos Guzman Alvarez
   3
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 using System;
  26 using System.Security.Cryptography;
  27
  28 using Mono.Security.Cryptography;
  29
  30 namespace Mono.Security.Protocol.Tls.Handshake.Client
  31 {
  32         internal class TlsClientFinished : HandshakeMessage
  33         {
  34                 #region Constructors
  35
  36                 public TlsClientFinished(Context context)
  37                         : base(context, HandshakeType.Finished)
  38                 {
  39                 }
  40
  41                 #endregion
  42
  43                 #region Methods
  44
  45                 public override void Update()
  46                 {
  47                         base.Update();
  48                         this.Reset();
  49                 }
  50
  51                 #endregion
  52
  53                 #region Protected Methods
  54
  55                 protected override void ProcessAsSsl3()
  56                 {
  57                         // Compute handshake messages hashes
  58                         HashAlgorithm hash = new SslHandshakeHash(this.Context.MasterSecret);
  59
  60                         TlsStream data = new TlsStream();
  61                         data.Write(this.Context.HandshakeMessages.ToArray());
  62                         data.Write((int)0x434C4E54);
  63
  64                         hash.TransformFinalBlock(data.ToArray(), 0, (int)data.Length);
  65
  66                         this.Write(hash.Hash);
  67
  68                         data.Reset();
  69                 }
  70
  71                 protected override void ProcessAsTls1()
  72                 {
  73                         // Compute handshake messages hash
  74                         HashAlgorithm hash = new MD5SHA1();
  75                         hash.ComputeHash(
  76                                 this.Context.HandshakeMessages.ToArray(),
  77                                 0,
  78                                 (int)this.Context.HandshakeMessages.Length);
  79
  80                         // Write message
  81                         Write(this.Context.Cipher.PRF(this.Context.MasterSecret, "client finished", hash.Hash, 12));
  82                 }
  83
  84                 #endregion
  85         }
  86 }