问CryptoPP::StreamTransformationFilter中可能存在内存泄漏

EN

StringSource string_source(plain_data, true, new StreamTransformationFilter(encryption, new StringSink(encypted_data)));

try
{
    CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption   encryption(this->aes_key.data(), this->aes_key.size(), this->aes_iv.data(), this->aes_iv.size())
    CryptoPP::StringSink                            string_sink(encypted_data);
    CryptoPP::StreamTransformationFilter            stf_encryptor(encryption, string_sink);
    CryptoPP::StringSource                          string_source(plain_data, true, stf_encryptor);
}

std::optional<std::string> Cryptography::decrypt_data(const std::string& encypted_data)
{
    std::optional<std::string> plain_data { std::nullopt };
    try
    {
        CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption   decryption(this->aes_key.data(), this->aes_key.size(), this->aes_iv.data(), this->aes_iv.size())
        StringSource string_source(encypted_data, true, new StreamTransformationFilter(decryption, new StringSink(plain_data)));
    }
    catch(const CryptoPP::Exception& e)
    {
#ifdef _DEBUG
        spdlog::error("CryptoPP Exception in Cryptography::decrypt_data : {}", ex.what());
#endif
        PLOG_ERROR << ex.what();
    }
    catch(const std::exception& ex)
    {
#ifdef _DEBUG
        spdlog::error("Exception in Cryptography::decrypt_data : {}", ex.what());
#endif
        PLOG_ERROR << ex.what();
    }
    return plain_data;
}