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aes-256-ctr.cpp
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aes-256-ctr.cpp
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/*
* This file is part of libkazv.
* SPDX-FileCopyrightText: 2020-2021 Tusooa Zhu <tusooa@kazv.moe>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <libkazv-config.hpp>
#include <cryptopp/aes.h>
#include <cryptopp/ccm.h>
#include "base64.hpp"
#include "aes-256-ctr.hpp"
namespace Kazv
{
struct AES256CTRDesc::Private
{
using ImplT = CryptoPP::CTR_Mode<CryptoPP::AES>::Encryption;
bool valid{true};
std::string key;
std::string iv;
ImplT algo;
};
AES256CTRDesc::AES256CTRDesc(RawTag, DataT key, DataT iv)
: m_d(std::make_unique<Private>())
{
if (key.size() != keySize || iv.size() != ivSize) {
m_d->valid = false;
} else {
m_d->valid = true;
m_d->key = encodeBase64(key, Base64Opts::urlSafe);
m_d->iv = encodeBase64(iv);
m_d->algo.SetKeyWithIV(reinterpret_cast<const unsigned char *>(key.data()),
key.size(),
reinterpret_cast<const unsigned char *>(iv.data()));
}
}
AES256CTRDesc::AES256CTRDesc(std::string key, std::string iv)
: AES256CTRDesc(RawTag{}, decodeBase64(key, Base64Opts::urlSafe), decodeBase64(iv))
{
}
KAZV_DEFINE_COPYABLE_UNIQUE_PTR(AES256CTRDesc, m_d)
AES256CTRDesc::~AES256CTRDesc() = default;
bool AES256CTRDesc::valid() const
{
return m_d && m_d->valid;
}
std::string AES256CTRDesc::key() const
{
return m_d->key;
}
std::string AES256CTRDesc::iv() const
{
return m_d->iv;
}
auto AES256CTRDesc::process(DataT data) const & -> Result
{
auto next = *this;
auto res = next.processInPlace(data);
return { std::move(next), std::move(res) };
}
auto AES256CTRDesc::process(DataT data) && -> Result
{
auto next = std::move(*this);
auto res = next.processInPlace(data);
return { std::move(next), std::move(res) };
}
auto AES256CTRDesc::processInPlace(DataT data) -> DataT
{
m_d->algo.ProcessString(reinterpret_cast<unsigned char *>(data.data()), data.size());
return data;
}
}

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