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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
using System;
using System.IO;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using org.apache.qpid.transport.util;
namespace org.apache.qpid.transport.network.io
{
public sealed class IoSSLTransport : IIoTransport
{
// constants
private const int DEFAULT_READ_WRITE_BUFFER_SIZE = 64*1024;
private const int TIMEOUT = 60000;
private const int QUEUE_SIZE = 1000;
// props
private static readonly Logger log = Logger.Get(typeof (IoSSLTransport));
private Stream m_stream;
private IoSender m_sender;
private IReceiver<ReceivedPayload<MemoryStream>> m_receiver;
private TcpClient m_socket;
private Connection m_con;
private readonly bool _rejectUntrusted;
public static Connection Connect(String host, int port, string serverName, string certPath, bool rejectUntrusted, ConnectionDelegate conndel)
{
IIoTransport transport = new IoSSLTransport(host, port, serverName, certPath, rejectUntrusted, conndel);
return transport.Connection;
}
public IoSSLTransport(String host, int port, string serverName, string certPath, bool rejectUntrusted, ConnectionDelegate conndel)
{
_rejectUntrusted = rejectUntrusted;
CreateSocket(host, port, serverName, certPath);
Sender = new IoSender(this, QUEUE_SIZE, TIMEOUT);
Receiver = new IoReceiver(Stream, Socket.ReceiveBufferSize*2, TIMEOUT);
Assembler assembler = new Assembler();
InputHandler inputHandler = new InputHandler(InputHandler.State.PROTO_HDR);
Connection = new Connection(assembler, new Disassembler(Sender, 64*1024 - 1), conndel);
// Input handler listen to Receiver events
Receiver.Received += inputHandler.On_ReceivedBuffer;
// Assembler listen to inputhandler events
inputHandler.ReceivedEvent += assembler.On_ReceivedEvent;
// Connection listen to asembler protocol event
Receiver.Closed += Connection.On_ReceivedClosed;
assembler.Closed += Connection.On_ReceivedClosed;
Receiver.Exception += Connection.On_ReceivedException;
inputHandler.ExceptionProcessing += Connection.On_ReceivedException;
assembler.ReceivedEvent += Connection.On_ReceivedEvent;
}
public Connection Connection
{
get { return m_con; }
set { m_con = value; }
}
public IReceiver<ReceivedPayload<MemoryStream>> Receiver
{
get { return m_receiver; }
set { m_receiver = value; }
}
public IoSender Sender
{
get { return m_sender; }
set { m_sender = value; }
}
public Stream Stream
{
get { return m_stream; }
set { m_stream = value; }
}
public TcpClient Socket
{
get { return m_socket; }
set { m_socket = value; }
}
#region Private Support Functions
private void CreateSocket(String host, int port, string serverName, string certPath)
{
TcpClient socket;
try
{
socket = new TcpClient();
String noDelay = Environment.GetEnvironmentVariable("qpid.tcpNoDelay");
String writeBufferSize = Environment.GetEnvironmentVariable("qpid.writeBufferSize");
String readBufferSize = Environment.GetEnvironmentVariable("qpid.readBufferSize");
socket.NoDelay = noDelay != null && bool.Parse(noDelay);
socket.ReceiveBufferSize = readBufferSize == null
? DEFAULT_READ_WRITE_BUFFER_SIZE
: int.Parse(readBufferSize);
socket.SendBufferSize = writeBufferSize == null
? DEFAULT_READ_WRITE_BUFFER_SIZE
: int.Parse(writeBufferSize);
log.Debug("NoDelay : {0}", socket.NoDelay);
log.Debug("ReceiveBufferSize : {0}", socket.ReceiveBufferSize);
log.Debug("SendBufferSize : {0}", socket.SendBufferSize);
log.Debug("Openning connection with host : {0}; port: {1}", host, port);
socket.Connect(host, port);
Socket = socket;
}
catch (Exception e)
{
throw new TransportException("Error connecting to broker", e);
}
try
{
//Initializes a new instance of the SslStream class using the specified Stream, stream closure behavior, certificate validation delegate and certificate selection delegate
SslStream sslStream = new SslStream(socket.GetStream(), false, ValidateServerCertificate, LocalCertificateSelection);
if (certPath != null)
{
X509CertificateCollection col = new X509CertificateCollection();
X509Certificate cert = X509Certificate.CreateFromCertFile(certPath);
col.Add(cert);
sslStream.AuthenticateAsClient(serverName, col, SslProtocols.Default, true);
}
else
{
sslStream.AuthenticateAsClient(serverName);
}
Stream = sslStream;
}
catch (AuthenticationException e)
{
log.Warn("Exception: {0}", e.Message);
if (e.InnerException != null)
{
log.Warn("Inner exception: {0}", e.InnerException.Message);
}
socket.Close();
throw new TransportException("Authentication failed - closing the connection.");
}
}
// The following method is invoked by the RemoteCertificateValidationDelegate.
public bool ValidateServerCertificate(
object sender,
X509Certificate certificate,
X509Chain chain,
SslPolicyErrors sslPolicyErrors)
{
bool result = true;
if (sslPolicyErrors != SslPolicyErrors.None && _rejectUntrusted )
{
log.Warn("Certificate error: {0}", sslPolicyErrors);
// Do not allow this client to communicate with unauthenticated servers.
result = false;
}
return result;
}
public X509Certificate LocalCertificateSelection(
Object sender,
string targetHost,
X509CertificateCollection localCertificates,
X509Certificate remoteCertificate,
string[] acceptableIssuers
)
{
return remoteCertificate;
}
#endregion
}
}
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