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

   1 /* Transport Security Layer (TLS)
   2  * Copyright (c) 2003 Carlos Guzmán Álvarez
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without restriction,
   7  * including without limitation the rights to use, copy, modify, merge,
   8  * publish, distribute, sublicense, and/or sell copies of the Software,
   9  * and to permit persons to whom the Software is furnished to do so,
  10  * subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  17  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * 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 : TlsHandshakeMessage
  33         {
  34                 #region CONSTRUCTORS
  35
  36                 public TlsClientFinished(TlsSession session)
  37                         : base(session, TlsHandshakeType.Finished,  TlsContentType.Handshake)
  38                 {
  39                 }
  40
  41                 #endregion
  42
  43                 #region METHODS
  44
  45                 public override void UpdateSession()
  46                 {
  47                         base.UpdateSession();
  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 TlsSslHandshakeHash(this.Session.Context.MasterSecret);
  59
  60                         TlsStream data = new TlsStream();
  61                         data.Write(this.Session.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 MD5SHA1CryptoServiceProvider();
  75                         hash.ComputeHash(
  76                                 Session.Context.HandshakeMessages.ToArray(),
  77                                 0,
  78                                 (int)Session.Context.HandshakeMessages.Length);
  79
  80                         // Write message
  81                         Write(Session.Context.Cipher.PRF(Session.Context.MasterSecret, "client finished", hash.Hash, 12));
  82                 }
  83
  84                 #endregion
  85         }
  86 }