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// **********************************************************************
//
// Copyright (c) 2001
// MutableRealms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#ifndef ICE_SSL_CONNECTION_OPENSSL_H
#define ICE_SSL_CONNECTION_OPENSSL_H
#include <IceUtil/Mutex.h>
#include <IceSSL/SslConnection.h>
#include <IceSSL/PluginBaseIF.h>
#include <IceSSL/SslConnectionOpenSSLF.h>
#include <IceSSL/CertificateVerifierOpenSSL.h>
#include <IceSSL/TraceLevelsF.h>
#include <openssl/ssl.h>
#include <map>
namespace IceSSL
{
namespace OpenSSL
{
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 Connection*, for use with the verifyCallback.
// I have purposely not used ConnectionPtr here, as connections register themselves
// with this map on construction and unregister themselves in the destructor. If
// this map used ConnectionPtr, Connection instances would never destruct as there
// would always be a reference to them from the map.
typedef std::map<SSL*, Connection*> SslConnectionMap;
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 Connection : public IceSSL::Connection
{
public:
Connection(const IceSSL::CertificateVerifierPtr&,
SSL*,
const IceSSL::PluginBaseIPtr&);
virtual ~Connection();
virtual int shutdown(int timeout = 0);
virtual int read(IceInternal::Buffer&, int);
virtual int write(IceInternal::Buffer&, int) = 0;
virtual int handshake(int timeout = 0) = 0;
void setHandshakeReadTimeout(int timeout);
static ConnectionPtr getConnection(SSL*);
// Callback from OpenSSL for purposes of certificate verification
int verifyCertificate(int, X509_STORE_CTX*);
protected:
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 addConnection(SSL*, Connection*);
static void removeConnection(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 SslConnectionMap _connectionMap;
static IceUtil::Mutex _connectionRepositoryMutex;
// Pointer to the OpenSSL Connection structure.
SSL* _sslConnection;
int _lastError;
IceUtil::Mutex _handshakeWaitMutex;
SafeFlag _handshakeFlag;
int _initWantRead;
int _initWantWrite;
int _handshakeReadTimeout;
int _readTimeout;
ConnectPhase _phase;
};
}
}
#endif
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