gdcmCryptoFactory.h

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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
{
 
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