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/* Transport Security Layer (TLS)
* Copyright (c) 2003 Carlos Guzmán Álvarez
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
using System;
using System.Security.Cryptography;
namespace Mono.Security.Protocol.Tls.Handshake.Client
{
internal class TlsClientHello : TlsHandshakeMessage
{
#region FIELDS
private byte[] random;
#endregion
#region CONSTRUCTORS
public TlsClientHello(TlsSession session)
: base(session, TlsHandshakeType.ClientHello, TlsContentType.Handshake)
{
}
#endregion
#region METHODS
public override void UpdateSession()
{
base.UpdateSession();
Session.Context.ClientRandom = random;
random = null;
}
#endregion
#region PROTECTED_METHODS
protected override void ProcessAsSsl3()
{
this.ProcessAsTls1();
}
protected override void ProcessAsTls1()
{
// Client Version
this.Write((short)this.Session.Context.Protocol);
// Random bytes - Unix time + Radom bytes [28]
TlsStream clientRandom = new TlsStream();
clientRandom.Write(this.Session.Context.GetUnixTime());
clientRandom.Write(this.Session.Context.GetSecureRandomBytes(28));
this.random = clientRandom.ToArray();
clientRandom.Reset();
this.Write(this.random);
// Session id
// Send the session ID empty
if (this.Session.SessionId != null)
{
this.Write((byte)this.Session.SessionId.Length);
if (this.Session.SessionId.Length > 0)
{
this.Write(this.Session.SessionId);
}
}
else
{
this.Write((byte)0);
}
// Write length of Cipher suites
this.Write((short)(this.Session.Context.SupportedCiphers.Count*2));
// Write Supported Cipher suites
for (int i = 0; i < this.Session.Context.SupportedCiphers.Count; i++)
{
this.Write((short)this.Session.Context.SupportedCiphers[i].Code);
}
// Compression methods length
this.Write((byte)1);
// Compression methods ( 0 = none )
this.Write((byte)this.Session.Context.CompressionMethod);
}
#endregion
}
}
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