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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#ifndef GDCMCRYPTOFACTORY_H
#define GDCMCRYPTOFACTORY_H
#include "gdcmCryptographicMessageSyntax.h"
#include <map>
namespace gdcm
{
/**
* \brief Class to do handle the crypto factory
* \details GDCM needs to access in a platform independant way
* the user specified crypto engine. It can be:
* \li CAPI (windows only)
* \li OPENSSL (portable)
* \li OPENSSLP7 (portable)
* By default the factory will try:
* CAPI if on windows
* OPENSSL if possible
* OPENSSLP7 when older OpenSSL is used.
*/
class GDCM_EXPORT CryptoFactory
{
public:
enum CryptoLib {DEFAULT = 0, OPENSSL = 1, CAPI = 2, OPENSSLP7 = 3};
virtual CryptographicMessageSyntax* CreateCMSProvider() = 0;
static CryptoFactory* GetFactoryInstance(CryptoLib id = DEFAULT);
protected:
CryptoFactory(CryptoLib id)
{
AddLib(id, this);
}
private:
static std::map<CryptoLib, CryptoFactory*>& getInstanceMap()
{
static std::map<CryptoLib, CryptoFactory*> libs;
return libs;
}
static void AddLib(CryptoLib id, CryptoFactory* f)
{
if (getInstanceMap().insert(std::pair<CryptoLib, CryptoFactory*>(id, f)).second == false)
{
gdcmErrorMacro( "Library already registered under id " << (int)id );
}
}
protected:
CryptoFactory()= default;
~CryptoFactory()= default;
};
} // end namespace gdcm
#endif // GDCMCRYPTOFACTORY_H
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