monero/contrib/epee/include/storages/crypted_storage.h

// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 


#ifndef _CRYPTED_STORAGE_H_
#define _CRYPTED_STORAGE_H_

#include "cryptopp_helper.h"

namespace epee
{
template<class t_base_storage, class crypt_provider, class t_key_provider>
class crypted_storage: public t_base_storage
{
public: 
	size_t	PackToSolidBuffer(std::string& targetObj)
	{
		size_t res = t_base_storage::PackToSolidBuffer(targetObj);
		if(res <= 0)
			return res;
		
		if(!crypt_provider::encrypt(targetObj, t_key_provider::get_storage_default_key()))
			return 0;

		return targetObj.size();
	}

	size_t		LoadFromSolidBuffer(const std::string& pTargetObj)
	{
		std::string buff_to_decrypt = pTargetObj;
		if(crypt_provider::decrypt(buff_to_decrypt, t_key_provider::get_storage_default_key()))
			return t_base_storage::LoadFromSolidBuffer(buff_to_decrypt);

		return 0;
	}
};
}

#endif //_CRYPTED_STORAGE_H_