sha256.cpp
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sha256.cpp
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	/*
	* This file is part of libkazv.
	* SPDX-FileCopyrightText: 2021 Tusooa Zhu <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/

	#include <cryptopp/sha.h>

	#include "base64.hpp"

	#include "sha256.hpp"

	namespace Kazv
	{
	struct SHA256Desc::Private
	{
	using ImplT = CryptoPP::SHA256;
	ImplT algo;
	};

	SHA256Desc::SHA256Desc()
	: m_d(std::make_unique<Private>())
	{
	}

	KAZV_DEFINE_COPYABLE_UNIQUE_PTR(SHA256Desc, m_d)

	SHA256Desc::~SHA256Desc() = default;

	SHA256Desc SHA256Desc::process(DataT data) const &
	{
	auto next = *this;
	next.processInPlace(std::move(data));
	return next;
	}

	SHA256Desc SHA256Desc::process(DataT data) &&
	{
	auto next = std::move(*this);
	next.processInPlace(std::move(data));
	return next;
	}

	void SHA256Desc::processInPlace(DataT data)
	{
	m_d->algo.Update(reinterpret_cast<const unsigned char *>(data.data()), data.size());
	}

	std::string SHA256Desc::get() const
	{
	auto algo = m_d->algo;
	std::string res(algo.DigestSize(), 0);
	algo.Final(reinterpret_cast<unsigned char *>(res.data()));

	return encodeBase64(res);
	}
	}