Method encrypt

payload.cpp:809–820

    }

    std::vector<uint8_t> encrypt(const std::string& raw) {
        std::vector<uint8_t> data(raw.begin(), raw.end());
        data = pad(data);
        std::vector<uint8_t> iv(16);
        for (size_t i = 0; i < 16; ++i) iv[i] = rand() % 256;
        std::vector<uint8_t> result = iv;
        AES_ctx ctx_copy = ctx;
        AES_ctx_set_iv(&ctx_copy, iv.data());
        AES_CBC_encrypt_buffer(&ctx_copy, data.data(), data.size());
        result.insert(result.end(), data.begin(), data.end());
        return result;
    }

    std::string decrypt(const std::vector<uint8_t>& enc) {
        if (enc.size() < 16) throw std::runtime_error("Invalid encrypted data");