CryptoPP + UE4

Hi!
Trying to write program with encrypting lib - CryptoPP 7.0.0 (linking dll). This lib has itself operators new and delete.

#ifndef CRYPTOPP_DLL_ONLY
# define CRYPTOPP_DEFAULT_NO_DLL
#endif

#ifdef CRYPTOPP_IMPORTS

static CryptoPP::PNew s_pNew = NULLPTR;
static CryptoPP::PDelete s_pDelete = NULLPTR;

extern "C" __declspec(dllexport) void __cdecl SetNewAndDeleteFromCryptoPP(CryptoPP::PNew pNew, CryptoPP::PDelete pDelete, CryptoPP::PSetNewHandler pSetNewHandler)
{
	(void)(pSetNewHandler);
	s_pNew = pNew;
	s_pDelete = pDelete;
}

void * __cdecl operator new (size_t size)
{
	return s_pNew(size);
}

void __cdecl operator delete (void * p)
{
	s_pDelete(p);
}

#endif

And because UE4 has itself overwrited operator new and delete i had a conflict:
LNK2005: bla bla bla already defined …

Without overwrite operators catch crash all program on the destructor.
Please help…

Example of using CryptoPP:

std::string AESApi::GetEncryptText(const std::string& text)
{
	std::string outText;

	try
	{
		CFB_Mode< AES >::Encryption e;

		e.SetKeyWithIV((CryptoPP::byte*)Key.c_str(), Key.length(), (CryptoPP::byte*)Iv.c_str());
		// CFB mode must not use padding. Specifying
		//  a scheme will result in an exception

		StringSource(text, true, new StreamTransformationFilter(e, new StringSink(outText)));
	}
	catch (const CryptoPP::Exception& e)
	{
		std::cerr << e.what() << std::endl;
		exit(1);
	}

	return outText;
}