1 /* Transport Security Layer (TLS)
2 * Copyright (c) 2003 Carlos Guzmán Álvarez
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:
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
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.
26 using System.Security.Cryptography;
28 namespace Mono.Security.Protocol.Tls.Handshake.Client
30 internal class TlsServerFinished : TlsHandshakeMessage
34 public TlsServerFinished(TlsSession session, byte[] buffer)
35 : base(session, TlsHandshakeType.ServerHello, buffer)
43 public override void UpdateSession()
47 Session.HandshakeFinished = true;
52 #region PROTECTED_METHODS
54 protected override void ProcessAsSsl3()
56 throw new NotSupportedException();
59 protected override void ProcessAsTls1()
61 byte[] serverPRF = ReadBytes((int)Length);
62 TlsStream hashes = new TlsStream();
64 hashes.Write(Session.Context.HandshakeHashes.GetMD5Hash());
65 hashes.Write(Session.Context.HandshakeHashes.GetSHAHash());
67 byte[] clientPRF = Session.Context.Cipher.PRF(Session.Context.MasterSecret, "server finished", hashes.ToArray(), 12);
71 // Check server prf against client prf
72 if (clientPRF.Length != serverPRF.Length)
74 throw new TlsException("Invalid finished message received from server.");
76 for (int i = 0; i < serverPRF.Length; i++)
78 if (clientPRF[i] != serverPRF[i])
80 throw new TlsException("Invalid finished message received from server.");
84 Session.Context.HandshakeHashes.Clear();