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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;
namespace Mono.Security.Protocol.Tls.Handshake.Client
{
internal class TlsServerHello : TlsHandshakeMessage
{
#region FIELDS
private TlsProtocol protocol;
private TlsCompressionMethod compressionMethod;
private byte[] random;
private byte[] sessionId;
private CipherSuite cipherSuite;
#endregion
#region CONSTRUCTORS
public TlsServerHello(TlsSession session, byte[] buffer)
: base(session, TlsHandshakeType.ServerHello, buffer)
{
}
#endregion
#region METHODS
public override void UpdateSession()
{
base.UpdateSession();
this.Session.SetSessionId(this.sessionId);
this.Session.Context.ServerRandom = this.random;
this.Session.Context.Cipher = this.cipherSuite;
this.Session.Context.CompressionMethod = this.compressionMethod;
this.Session.Context.Cipher.Context = this.Session.Context;
// Compute ClientRandom + ServerRandom
TlsStream random = new TlsStream();
random.Write(this.Session.Context.ClientRandom);
random.Write(this.Session.Context.ServerRandom);
this.Session.Context.RandomCS = random.ToArray();
// Server Random + Client Random
random.Reset();
random.Write(this.Session.Context.ServerRandom);
random.Write(this.Session.Context.ClientRandom);
this.Session.Context.RandomSC = random.ToArray();
random.Reset();
}
#endregion
#region PROTECTED_METHODS
protected override void ProcessAsSsl3()
{
#warning "Check that the protocol sent by the server is supported"
// Read protocol version
this.protocol = (TlsProtocol)this.ReadInt16();
// Read random - Unix time + Random bytes
this.random = this.ReadBytes(32);
// Read Session id
int length = (int)ReadByte();
if (length > 0)
{
this.sessionId = this.ReadBytes(length);
}
// Read cipher suite
short cipherCode = this.ReadInt16();
if (this.Session.Context.SupportedCiphers.IndexOf(cipherCode) == -1)
{
// The server has sent an invalid ciphersuite
throw new TlsException("Invalid cipher suite received from server");
}
this.cipherSuite = this.Session.Context.SupportedCiphers[cipherCode];
// Read compression methods ( always 0 )
this.compressionMethod = (TlsCompressionMethod)this.ReadByte();
}
protected override void ProcessAsTls1()
{
// Read protocol version
this.protocol = (TlsProtocol)this.ReadInt16();
// Read random - Unix time + Random bytes
this.random = this.ReadBytes(32);
// Read Session id
int length = (int)ReadByte();
if (length > 0)
{
this.sessionId = this.ReadBytes(length);
}
// Read cipher suite
short cipherCode = this.ReadInt16();
if (this.Session.Context.SupportedCiphers.IndexOf(cipherCode) == -1)
{
// The server has sent an invalid ciphersuite
throw new TlsException("Invalid cipher suite received from server");
}
this.cipherSuite = this.Session.Context.SupportedCiphers[cipherCode];
// Read compression methods ( always 0 )
this.compressionMethod = (TlsCompressionMethod)this.ReadByte();
}
#endregion
}
}
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