// Transport Security Layer (TLS)
// Copyright (c) 2003-2004 Carlos Guzman Alvarez

//
// 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.Text;
using Mono.Security;

namespace Mono.Security.Protocol.Tls.Handshake.Client
{
	internal class TlsServerCertificateRequest : HandshakeMessage
	{
		#region Fields

		private ClientCertificateType[]	certificateTypes;
		private string[]				distinguisedNames;

		#endregion

		#region Constructors

		public TlsServerCertificateRequest(Context context, byte[] buffer) 
			: base(context, HandshakeType.CertificateRequest, buffer)
		{
		}

		#endregion

		#region Methods

		public override void Update()
		{
			base.Update();

			this.Context.ServerSettings.CertificateTypes	= this.certificateTypes;
			this.Context.ServerSettings.DistinguisedNames	= this.distinguisedNames;
			this.Context.ServerSettings.CertificateRequest	= true;
		}

		#endregion

		#region Protected Methods

		protected override void ProcessAsSsl3()
		{
			this.ProcessAsTls1();
		}

		protected override void ProcessAsTls1()
		{
			// Read requested certificate types
			int typesCount = this.ReadByte();
						
			this.certificateTypes = new ClientCertificateType[typesCount];

			for (int i = 0; i < typesCount; i++)
			{
				this.certificateTypes[i] = (ClientCertificateType)this.ReadByte();
			}

			/*
			 * Read requested certificate authorities (Distinguised Names)
			 * 
			 * Name ::= SEQUENCE OF RelativeDistinguishedName
			 * 
			 * RelativeDistinguishedName ::= SET OF AttributeValueAssertion
			 * 
			 * AttributeValueAssertion ::= SEQUENCE {
			 * attributeType OBJECT IDENTIFIER
			 * attributeValue ANY }
			 */
			if (this.ReadInt16() != 0)
			{
				ASN1 rdn = new ASN1(this.ReadBytes(this.ReadInt16()));

				distinguisedNames = new string[rdn.Count];

				for (int i = 0; i < rdn.Count; i++)
				{
					// element[0] = attributeType
					// element[1] = attributeValue
					ASN1 element = new ASN1(rdn[i].Value);

					distinguisedNames[i] = Encoding.UTF8.GetString(element[1].Value);
				}
			}
		}

		#endregion
	}
}