1 /* Transport Security Layer (TLS)
2 * Copyright (c) 2003-2004 Carlos Guzman Alvarez
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 TlsClientHello : TlsHandshakeMessage
34 private byte[] random;
40 public TlsClientHello(TlsContext context)
41 : base(context, TlsHandshakeType.ClientHello)
49 public override void Update()
53 this.Context.ClientRandom = random;
54 this.Context.ClientHelloProtocol = this.Context.Protocol;
61 #region Protected Methods
63 protected override void ProcessAsSsl3()
68 protected override void ProcessAsTls1()
71 this.Write(this.Context.Protocol);
73 // Random bytes - Unix time + Radom bytes [28]
74 TlsStream clientRandom = new TlsStream();
75 clientRandom.Write(this.Context.GetUnixTime());
76 clientRandom.Write(this.Context.GetSecureRandomBytes(28));
77 this.random = clientRandom.ToArray();
80 this.Write(this.random);
83 // Send the session ID empty
84 if (this.Context.SessionId != null)
86 this.Write((byte)this.Context.SessionId.Length);
87 if (this.Context.SessionId.Length > 0)
89 this.Write(this.Context.SessionId);
97 // Write length of Cipher suites
98 this.Write((short)(this.Context.SupportedCiphers.Count*2));
100 // Write Supported Cipher suites
101 for (int i = 0; i < this.Context.SupportedCiphers.Count; i++)
103 this.Write((short)this.Context.SupportedCiphers[i].Code);
106 // Compression methods length
109 // Compression methods ( 0 = none )
110 this.Write((byte)this.Context.CompressionMethod);