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// **********************************************************************
//
// Copyright (c) 2003
// ZeroC, Inc.
// Billerica, MA, USA
//
// All Rights Reserved.
//
// Ice is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation.
//
// **********************************************************************
#ifndef ICE_SSL_TRANSCEIVER_H
#define ICE_SSL_TRANSCEIVER_H
#include <Ice/LoggerF.h>
#include <Ice/StatsF.h>
#include <Ice/Transceiver.h>
#include <Ice/Buffer.h>
#include <IceUtil/Mutex.h>
#include <IceSSL/SslTransceiverF.h>
#include <IceSSL/OpenSSLPluginIF.h>
#include <IceSSL/TraceLevelsF.h>
#include <IceSSL/CertificateVerifierF.h>
#include <IceSSL/CertificateVerifierOpenSSL.h>
#include <openssl/ssl.h>
#include <map>
namespace IceSSL
{
class SafeFlag
{
public:
SafeFlag(bool flagVal = false)
{
_flag = flagVal;
}
~SafeFlag()
{
}
bool checkAndSet()
{
IceUtil::Mutex::Lock sync(_mutex);
if(_flag)
{
return false;
}
else
{
_flag = true;
return true;
}
}
bool check()
{
IceUtil::Mutex::Lock sync(_mutex);
return _flag;
}
void set()
{
IceUtil::Mutex::Lock sync(_mutex);
_flag = true;
}
void unset()
{
IceUtil::Mutex::Lock sync(_mutex);
_flag = false;
}
private:
IceUtil::Mutex _mutex;
bool _flag;
};
class HandshakeSentinel
{
public:
HandshakeSentinel(SafeFlag& handshakeFlag) :
_flag(handshakeFlag)
{
_ownHandshake = _flag.checkAndSet();
}
~HandshakeSentinel()
{
if(_ownHandshake)
{
_flag.unset();
}
}
bool ownHandshake()
{
return _ownHandshake;
}
private:
bool _ownHandshake;
SafeFlag& _flag;
};
// NOTE: This is a mapping from SSL* to SslTransceiver*, for use with the verifyCallback.
// I have purposely not used SslTransceiverPtr here, as connections register themselves
// with this map on construction and unregister themselves in the destructor. If
// this map used SslTransceiverPtr, SslTransceiver instances would never destruct as there
// would always be a reference to them from the map.
class SslTransceiver;
typedef std::map<SSL*, SslTransceiver*> SslTransceiverMap;
typedef enum
{
Handshake, // The connection is negotiating a connection with the peer.
Shutdown, // The connection is in the process of shutting down.
Connected // The connection is connected - communication may continue.
} ConnectPhase;
class SslTransceiver : public IceInternal::Transceiver
{
public:
virtual SOCKET fd();
virtual void close();
virtual void shutdown();
virtual void write(IceInternal::Buffer&, int) = 0;
virtual void read(IceInternal::Buffer&, int);
virtual std::string toString() const;
void forceHandshake();
virtual int handshake(int timeout = 0) = 0;
void setHandshakeReadTimeout(int);
void setHandshakeRetries(int);
static SslTransceiverPtr getTransceiver(SSL*);
// Callback from OpenSSL for purposes of certificate verification
int verifyCertificate(int, X509_STORE_CTX*);
protected:
virtual int internalShutdown(int timeout = 0);
int connect();
int accept();
int renegotiate();
int initialize(int timeout);
int pending();
int getLastError() const;
int sslRead(char*, int);
int sslWrite(char*, int);
int select(int, bool);
int readSelect(int);
int writeSelect(int);
int readSSL(IceInternal::Buffer&, int);
static void addTransceiver(SSL*, SslTransceiver*);
static void removeTransceiver(SSL*);
virtual void showConnectionInfo() = 0;
void showCertificateChain(BIO*);
void showPeerCertificate(BIO*, const char*);
void showSharedCiphers(BIO*);
void showSessionInfo(BIO*);
void showSelectedCipherInfo(BIO*);
void showHandshakeStats(BIO*);
void showClientCAList(BIO*, const char*);
void setLastError(int errorCode) { _lastError = errorCode; };
static SslTransceiverMap _transceiverMap;
static IceUtil::Mutex _transceiverRepositoryMutex;
// Pointer to the OpenSSL Connection structure.
SSL* _sslConnection;
int _lastError;
IceUtil::Mutex _handshakeWaitMutex;
SafeFlag _handshakeFlag;
int _initWantRead;
int _initWantWrite;
int _handshakeReadTimeout;
int _handshakeRetries;
int _readTimeout;
ConnectPhase _phase;
SslTransceiver(const OpenSSLPluginIPtr&, SOCKET, const IceSSL::CertificateVerifierPtr&, SSL*);
virtual ~SslTransceiver();
const OpenSSLPluginIPtr _plugin;
const TraceLevelsPtr _traceLevels;
const Ice::LoggerPtr _logger;
const Ice::StatsPtr _stats;
const std::string _name;
SOCKET _fd;
fd_set _rFdSet;
fd_set _wFdSet;
IceSSL::CertificateVerifierPtr _certificateVerifier;
};
}
#endif
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