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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.IO;
using System.Security.Cryptography;
namespace Mono.Security.Protocol.Tls.Handshake.Client
{
internal class TlsClientKeyExchange : TlsHandshakeMessage
{
#region CONSTRUCTORS
public TlsClientKeyExchange (TlsSession session) :
base(session,
TlsHandshakeType.ClientKeyExchange,
TlsContentType.Handshake)
{
}
#endregion
#region PROTECTED_METHODS
protected override void ProcessAsSsl3()
{
// Compute pre master secret
byte[] preMasterSecret = this.Session.Context.Cipher.CreatePremasterSecret();
// Create a new RSA key
RSA rsa = this.Session.Context.Cipher.CreateRSA();
// Encrypt premaster_sercret
RSAPKCS1KeyExchangeFormatter formatter = new RSAPKCS1KeyExchangeFormatter(rsa);
// Write the preMasterSecret encrypted
byte[] buffer = formatter.CreateKeyExchange(preMasterSecret);
this.Write(buffer);
// Create master secret
this.Session.Context.Cipher.ComputeMasterSecret(preMasterSecret);
// Create keys
this.Session.Context.Cipher.ComputeKeys();
// Clear resources
rsa.Clear();
}
protected override void ProcessAsTls1()
{
// Compute pre master secret
byte[] preMasterSecret = this.Session.Context.Cipher.CreatePremasterSecret();
// Create a new RSA key
RSA rsa = this.Session.Context.Cipher.CreateRSA();
// Encrypt premaster_sercret
RSAPKCS1KeyExchangeFormatter formatter = new RSAPKCS1KeyExchangeFormatter(rsa);
// Write the preMasterSecret encrypted
byte[] buffer = formatter.CreateKeyExchange(preMasterSecret);
this.Write((short)buffer.Length);
this.Write(buffer);
// Create master secret
this.Session.Context.Cipher.ComputeMasterSecret(preMasterSecret);
// Create keys
this.Session.Context.Cipher.ComputeKeys();
// Clear resources
rsa.Clear();
}
#endregion
}
}
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