crypted_storage.h

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// 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:
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// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
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#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_