Differential D224 Diff 652 src/examples/key-export-example.cpp

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				/*
				* This file is part of libkazv.
				* SPDX-FileCopyrightText: 2025 tusooa <tusooa@kazv.moe>
				* SPDX-License-Identifier: AGPL-3.0-or-later
				*/

				#include <libkazv-config.hpp>
				#include "key-export.hpp"
				#include <iostream>
				#include <fstream>

				using namespace Kazv;

				std::string readWhole(std::ifstream &stream)
				{
				// https://en.cppreference.com/w/cpp/io/basic_istream/read.html
				auto size = stream.tellg();
				std::string res(size, '\0');
				stream.seekg(0);
				stream.read(res.data(), size);
				return res;
				}

				int main(int argc, char *argv[])
				{
				if (argc < 2) {
				std::cerr << "Usage: " << argv[0] << " FILE" << std::endl;
				return 1;
				}

				auto stream = std::ifstream(argv[1], std::ios_base::ate \| std::ios_base::binary);

				if (!stream) {
				std::cerr << "Cannot open file for reading." << std::endl;
				return 1;
				}

				auto content = readWhole(stream);

				std::cout << "Enter password:" << std::endl;

				auto password = std::string();
				std::getline(std::cin, password);

				auto decrypted = decryptKeyExport(content, password);

				if (decrypted.has_value()) {
				std::cout << decrypted.value().dump() << std::endl;
				return 0;
				} else {
				std::cerr << "Error: " << decrypted.reason() << std::endl;
				return 1;
				}
				}