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/* Copyright (c) 2008-2009, AbiSource Corporation B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of AbiSource Corporation B.V. nor the
* names of other contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ABISOURCE CORPORATION B.V. AND OTHER
* CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ABISOURCE
* CORPORATION B.V OR OTHER CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __TLS_TUNNEL_H__
#define __TLS_TUNNEL_H__
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <asio.hpp>
#include <string>
#include <vector>
#ifdef _MSC_VER
typedef long ssize_t;
typedef int pid_t;
#endif
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
namespace tls_tunnel {
typedef boost::shared_ptr<asio::ip::tcp::socket> socket_ptr_t;
typedef boost::shared_ptr<gnutls_session_t> session_ptr_t;
typedef boost::shared_ptr< std::vector<char> > buffer_ptr_t;
class Exception {
public:
Exception(const std::string& message);
const std::string& message() const;
private:
std::string message_;
};
class Transport : public boost::enable_shared_from_this<Transport> {
public:
asio::io_service& io_service();
void run();
void stop();
protected:
Transport();
virtual ~Transport();
private:
asio::io_service io_service_;
asio::io_service::work work_;
};
typedef boost::shared_ptr<Transport> transport_ptr_t;
class ClientTransport : public Transport {
public:
ClientTransport(const std::string& host, unsigned short port,
boost::function<void (transport_ptr_t, socket_ptr_t)> on_connect);
void connect();
private:
std::string host_;
unsigned short port_;
boost::function<void (transport_ptr_t, socket_ptr_t)> on_connect_;
};
class ServerTransport : public Transport {
public:
ServerTransport(const std::string& ip, unsigned short port,
boost::function<void (transport_ptr_t, socket_ptr_t)> on_connect);
void accept();
private:
void on_accept(const asio::error_code& error, socket_ptr_t socket_ptr);
asio::ip::tcp::acceptor acceptor_;
boost::function<void (transport_ptr_t, socket_ptr_t)> on_connect_;
};
class Proxy {
public:
virtual ~Proxy();
static bool tls_tunnel_init();
static void tls_tunnel_deinit();
virtual void setup() = 0;
void run();
virtual void stop();
protected:
Proxy(const std::string& ca_file);
void on_local_read(const asio::error_code& error, std::size_t bytes_transferred,
transport_ptr_t transport_ptr, session_ptr_t session_ptr, socket_ptr_t local_socket_ptr,
buffer_ptr_t local_buffer_ptr, socket_ptr_t remote_socket_ptr);
void tunnel(transport_ptr_t transport_ptr, session_ptr_t session_ptr,
socket_ptr_t local_socket_ptr, socket_ptr_t remote_socket_ptr);
void disconnect_(transport_ptr_t transport_ptr, session_ptr_t session_ptr,
socket_ptr_t local_socket_ptr, socket_ptr_t remote_socket_ptr);
gnutls_certificate_credentials_t x509cred;
transport_ptr_t transport_ptr_; // we only store this as a member so we are able to start/stop the transport
private:
void tunnel_(transport_ptr_t transport_ptr, session_ptr_t session_ptr,
socket_ptr_t local_socket_ptr, buffer_ptr_t local_buffer_ptr,
socket_ptr_t remote_socket);
asio::thread* t;
};
// FIXME: this clientproxy can only handle 1 SSL connection at the same time
class ClientProxy : public Proxy {
public:
ClientProxy(const std::string& connect_address, unsigned short connect_port,
const std::string& ca_file, bool check_hostname);
virtual void setup();
virtual void stop();
const std::string& local_address() const;
unsigned short local_port() const;
private:
void on_transport_connect(transport_ptr_t transport_ptr, socket_ptr_t remote_socket_ptr);
void on_client_connect(const asio::error_code& error, transport_ptr_t transport_ptr,
session_ptr_t session_ptr, socket_ptr_t local_socket_ptr, socket_ptr_t remote_socket_ptr);
session_ptr_t setup_tls_session(socket_ptr_t remote_socket_ptr);
std::string local_address_;
unsigned short local_port_;
std::string connect_address_;
unsigned short connect_port_;
boost::shared_ptr<asio::ip::tcp::acceptor> acceptor_ptr;
bool check_hostname_;
};
class ServerProxy : public Proxy {
public:
ServerProxy(const std::string& bind_ip, unsigned short bind_port, unsigned short local_port,
const std::string& ca_file, const std::string& cert_file, const std::string& key_file);
virtual void setup();
private:
void on_transport_connect(transport_ptr_t transport_ptr, socket_ptr_t remote_socket_ptr);
session_ptr_t setup_tls_session(socket_ptr_t remote_socket_ptr);
std::string bind_ip_;
unsigned short bind_port_;
unsigned short local_port_;
gnutls_dh_params_t dh_params;
};
} /* namespace tls_tunnel */
#endif /* __TLS_TUNNEL_H__ */
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