157 lines
4.4 KiB
C#
157 lines
4.4 KiB
C#
// Transport Security Layer (TLS)
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// Copyright (c) 2003-2004 Carlos Guzman Alvarez
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Globalization;
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using System.IO;
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using Mono.Security.Protocol.Tls.Handshake;
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using Mono.Security.Protocol.Tls.Handshake.Server;
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namespace Mono.Security.Protocol.Tls
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{
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internal class ServerRecordProtocol : RecordProtocol
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{
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#region Constructors
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public ServerRecordProtocol(
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Stream innerStream,
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ServerContext context) : base(innerStream, context)
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{
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}
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#endregion
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#region Send Messages
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public override HandshakeMessage GetMessage(HandshakeType type)
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{
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// Create and process the record message
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HandshakeMessage msg = this.createServerHandshakeMessage(type);
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return msg;
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}
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#endregion
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#region Handshake Processing Methods
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protected override void ProcessHandshakeMessage(TlsStream handMsg)
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{
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HandshakeType handshakeType = (HandshakeType)handMsg.ReadByte();
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HandshakeMessage message = null;
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// Read message length
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int length = handMsg.ReadInt24();
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// Read message data
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byte[] data = new byte[length];
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handMsg.Read(data, 0, length);
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// Create and process the server message
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message = this.createClientHandshakeMessage(handshakeType, data);
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message.Process();
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// Update the last handshake message
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this.Context.LastHandshakeMsg = handshakeType;
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// Update session
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if (message != null)
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{
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message.Update();
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this.Context.HandshakeMessages.WriteByte ((byte) handshakeType);
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this.Context.HandshakeMessages.WriteInt24 (length);
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this.Context.HandshakeMessages.Write (data, 0, data.Length);
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}
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}
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#endregion
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#region Server Handshake Message Factories
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private HandshakeMessage createClientHandshakeMessage(
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HandshakeType type, byte[] buffer)
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{
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switch (type)
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{
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case HandshakeType.ClientHello:
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return new TlsClientHello(this.context, buffer);
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case HandshakeType.Certificate:
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return new TlsClientCertificate(this.context, buffer);
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case HandshakeType.ClientKeyExchange:
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return new TlsClientKeyExchange(this.context, buffer);
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case HandshakeType.CertificateVerify:
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return new TlsClientCertificateVerify(this.context, buffer);
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case HandshakeType.Finished:
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return new TlsClientFinished(this.context, buffer);
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default:
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throw new TlsException(
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AlertDescription.UnexpectedMessage,
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String.Format(CultureInfo.CurrentUICulture,
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"Unknown server handshake message received ({0})",
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type.ToString()));
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}
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}
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private HandshakeMessage createServerHandshakeMessage(
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HandshakeType type)
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{
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switch (type)
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{
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case HandshakeType.HelloRequest:
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this.SendRecord(HandshakeType.ClientHello);
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return null;
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case HandshakeType.ServerHello:
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return new TlsServerHello(this.context);
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case HandshakeType.Certificate:
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return new TlsServerCertificate(this.context);
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case HandshakeType.ServerKeyExchange:
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return new TlsServerKeyExchange(this.context);
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case HandshakeType.CertificateRequest:
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return new TlsServerCertificateRequest(this.context);
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case HandshakeType.ServerHelloDone:
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return new TlsServerHelloDone(this.context);
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case HandshakeType.Finished:
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return new TlsServerFinished(this.context);
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default:
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throw new InvalidOperationException("Unknown server handshake message type: " + type.ToString() );
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}
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}
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#endregion
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}
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}
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