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FTPSClientSession.cpp
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151 lines (122 loc) · 3.51 KB
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//
// FTPSClientSession.cpp
//
// Library: NetSSL_OpenSSL
// Package: FTPS
// Module: FTPSClientSession
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/FTPSClientSession.h"
#include "Poco/Net/SecureStreamSocket.h"
#include "Poco/Net/SecureStreamSocketImpl.h"
#include "Poco/Net/SSLManager.h"
#include "Poco/Net/NetException.h"
namespace Poco {
namespace Net {
FTPSClientSession::FTPSClientSession():
FTPClientSession()
{
}
FTPSClientSession::FTPSClientSession(Context::Ptr pContext):
FTPClientSession(),
_pContext(pContext)
{
}
FTPSClientSession::FTPSClientSession(const StreamSocket& socket, bool readWelcomeMessage, bool enableFTPS, Context::Ptr pContext):
FTPClientSession(socket, readWelcomeMessage),
_enableFTPS(enableFTPS),
_pContext(pContext)
{
}
FTPSClientSession::FTPSClientSession(const std::string& host, Poco::UInt16 port, const std::string& username, const std::string& password, Context::Ptr pContext):
FTPClientSession(host, port, username, password),
_pContext(pContext)
{
}
FTPSClientSession::~FTPSClientSession()
{
}
void FTPSClientSession::enableFTPS(bool enable)
{
_enableFTPS = enable;
}
void FTPSClientSession::beforeCreateDataSocket()
{
if (_secureDataConnection) return;
_secureDataConnection = false;
if (!_pControlSocket->secure()) return;
std::string sResponse;
int status = sendCommand("PBSZ 0", sResponse);
if (isPositiveCompletion(status))
{
status = sendCommand("PROT P", sResponse);
if (isPositiveCompletion(status))
{
_secureDataConnection = true;
}
}
}
void FTPSClientSession::afterCreateControlSocket()
{
if (!_enableFTPS) return;
_pControlSocket->setNoDelay(true);
if (_pControlSocket->secure()) return;
std::string sResponse;
int status = sendCommand("AUTH TLS", sResponse);
if (!isPositiveCompletion(status))
status = sendCommand("AUTH SSL", sResponse);
if (isPositiveCompletion(status))
{
// Server support FTPS
try
{
if (!_pContext) _pContext = Poco::Net::SSLManager::instance().defaultClientContext();
Poco::Net::SecureStreamSocket sss(Poco::Net::SecureStreamSocket::attach(*_pControlSocket, _pContext));
*_pControlSocket = sss;
}
catch (Poco::Exception&)
{
throw;
}
}
else
{
_enableFTPS = false;
}
}
StreamSocket FTPSClientSession::establishDataConnection(const std::string& command, const std::string& arg)
{
beforeCreateDataSocket();
StreamSocket ss = FTPClientSession::establishDataConnection(command, arg);
ss.setNoDelay(true);
// SSL nogotiating of data socket
if (_secureDataConnection && _pControlSocket->secure())
{
// We need to reuse the control socket SSL session so the server can ensure that client that opened control socket is the same using data socket
Poco::Net::SecureStreamSocketImpl* pSecure = dynamic_cast<Poco::Net::SecureStreamSocketImpl*>(_pControlSocket->impl());
if (pSecure != nullptr)
{
Poco::Net::SecureStreamSocket sss(Poco::Net::SecureStreamSocket::attach(ss, pSecure->context(), pSecure->currentSession()));
ss = sss;
if (_forceSessionReuse)
{
sss.setLazyHandshake(false);
if (sss.completeHandshake() != 1)
throw Poco::Net::FTPException("SSL Session HANDSHAKE error");
if (!sss.sessionWasReused())
throw Poco::Net::FTPException("SSL Session for data connection was not reused");
}
}
}
return ss;
}
void FTPSClientSession::receiveServerReadyReply()
{
FTPClientSession::receiveServerReadyReply();
afterCreateControlSocket();
}
} } // namespace Poco::Net