Atmosphere/libraries/libvapours/include/vapours/crypto/crypto_ctr_encryptor.hpp

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2020-04-06 06:25:28 +00:00
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours/common.hpp>
#include <vapours/assert.hpp>
#include <vapours/util.hpp>
#include <vapours/crypto/impl/crypto_ctr_mode_impl.hpp>
namespace ams::crypto {
/* TODO: C++20 BlockCipher concept */
template<typename BlockCipher>
class CtrEncryptor {
NON_COPYABLE(CtrEncryptor);
NON_MOVEABLE(CtrEncryptor);
private:
using Impl = impl::CtrModeImpl<BlockCipher>;
public:
static constexpr size_t KeySize = Impl::KeySize;
static constexpr size_t BlockSize = Impl::BlockSize;
static constexpr size_t IvSize = Impl::IvSize;
private:
Impl impl;
public:
CtrEncryptor() { /* ... */ }
void Initialize(const BlockCipher *cipher, const void *iv, size_t iv_size) {
this->impl.Initialize(cipher, iv, iv_size);
}
void Initialize(const BlockCipher *cipher, const void *iv, size_t iv_size, s64 offset) {
this->impl.Initialize(cipher, iv, iv_size, offset);
}
void SwitchMessage(const void *iv, size_t iv_size) {
this->impl.SwitchMessage(iv, iv_size);
}
size_t Update(void *dst, size_t dst_size, const void *src, size_t src_size) {
return this->impl.Update(dst, dst_size, src, src_size);
}
};
}