Abort error in encryption function

void Encrypt (char *pszFile, char *pszSecret) {
	int size;
	char *buf;
	_bstr_t cipherText;
	string name;
	ifstream in (pszFile, ios::in | ios::binary | ios::ate);
	ofstream out;
	IAlgorithmPtr algo;
	IEncryptedDataPtr encryptor;

	if ( !in.is_open() )
		cout << szErrNoFile << std::endl;

	else {
		size = in.tellg();

		buf = new char[size + 1];
		buf[size] = 0;

		in.seekg(0, ios::beg);
		in.read(buf, size);
		in.close();
  
		encryptor.CreateInstance("CAPICOM.EncryptedData");
		encryptor->PutContent(_bstr_t (buf)); //I THINK ERROR IS HERE

		algo = encryptor->GetAlgorithm();
		algo->PutName(CAPICOM_ENCRYPTION_ALGORITHM_AES);
		algo->PutKeyLength(CAPICOM_ENCRYPTION_KEY_LENGTH_MAXIMUM);

		encryptor->SetSecret(_bstr_t (pszSecret), CAPICOM_SECRET_PASSWORD);

		cipherText = encryptor->Encrypt(CAPICOM_ENCODE_BASE64);

		name = pszFile;
		name.append(".encrypted");
		out.open(name.c_str(), ios::out | ios::binary);


		if ( !out.is_open() )
			cout << szErrWrite << endl;

		else {
			out << cipherText;
			out.close();
		}
	}
}