mcs/class/Mono.Security/Mono.Security.Protocol.Tls.Handshake.Server/TlsServerFinished.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.Server
  31 {
  32         internal class TlsServerFinished : HandshakeMessage
  33         {
  34                 #region Constructors
  35
  36                 public TlsServerFinished(Context context)
  37                         : base(context, HandshakeType.Finished)
  38                 {
  39                 }
  40
  41                 #endregion
  42
  43                 #region Protected Methods
  44
  45                 protected override void ProcessAsSsl3()
  46                 {
  47                         // Compute handshake messages hashes
  48                         HashAlgorithm hash = new SslHandshakeHash(this.Context.MasterSecret);
  49
  50                         TlsStream data = new TlsStream();
  51                         data.Write(this.Context.HandshakeMessages.ToArray());
  52                         data.Write((int)0x53525652);
  53
  54                         hash.TransformFinalBlock(data.ToArray(), 0, (int)data.Length);
  55
  56                         this.Write(hash.Hash);
  57
  58                         data.Reset();
  59                 }
  60
  61                 protected override void ProcessAsTls1()
  62                 {
  63                         // Compute handshake messages hash
  64                         HashAlgorithm hash = new MD5SHA1();
  65                         hash.ComputeHash(
  66                                 this.Context.HandshakeMessages.ToArray(),
  67                                 0,
  68                                 (int)this.Context.HandshakeMessages.Length);
  69
  70                         // Write message
  71                         this.Write(this.Context.Cipher.PRF(
  72                                 this.Context.MasterSecret, "server finished", hash.Hash, 12));
  73                 }
  74
  75                 #endregion
  76         }
  77 }