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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;
using Mono.Security.Protocol.Tls.Alerts;
using Mono.Security.X509;
namespace Mono.Security.Protocol.Tls.Handshake.Client
{
internal class TlsServerCertificate : TlsHandshakeMessage
{
#region FIELDS
private X509CertificateCollection certificates;
#endregion
#region PROPERTIES
public X509CertificateCollection Certificates
{
get { return certificates; }
}
#endregion
#region CONSTRUCTORS
public TlsServerCertificate(TlsSession session, byte[] buffer)
: base(session, TlsHandshakeType.Certificate, buffer)
{
}
#endregion
#region METHODS
public override void UpdateSession()
{
base.UpdateSession();
this.Session.Context.ServerSettings.ServerCertificates = certificates;
}
#endregion
#region PROTECTED_METHODS
protected override void ProcessAsSsl3()
{
this.ProcessAsTls1();
}
protected override void ProcessAsTls1()
{
this.certificates = new X509CertificateCollection();
int readed = 0;
int length = this.ReadInt24();
while (readed < length)
{
// Read certificate length
int certLength = ReadInt24();
// Increment readed
readed += 3;
if (certLength > 0)
{
// Read certificate
X509Certificate certificate = new X509Certificate(this.ReadBytes(certLength));
certificates.Add(certificate);
readed += certLength;
this.validateCertificate(certificate);
}
}
}
#endregion
#region PRIVATE_METHODS
private void validateCertificate(X509Certificate certificate)
{
#warning "Check validity of certificates"
// 1 step : Validate dates
if (!certificate.IsCurrent)
{
throw Session.CreateException("Certificate received from the server expired.");
}
// 2 step: Validate CA
// 3 step: Validate digital sign
if (!certificate.VerifySignature(certificate.RSA))
{
throw Session.CreateException("Certificate received from the server has invalid signature.");
}
// 4 step: Validate domain name
}
#endregion
}
}
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