mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-25 14:11:15 +00:00
77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 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_hash_function.hpp>
|
|
#include <vapours/crypto/crypto_memory_clear.hpp>
|
|
|
|
namespace ams::crypto {
|
|
|
|
struct Sha256Context;
|
|
|
|
}
|
|
|
|
namespace ams::crypto::impl {
|
|
|
|
class Sha256Impl {
|
|
public:
|
|
static constexpr size_t HashSize = 0x20;
|
|
static constexpr size_t BlockSize = 0x40;
|
|
private:
|
|
enum State {
|
|
State_None,
|
|
State_Initialized,
|
|
State_Done,
|
|
};
|
|
private:
|
|
u32 m_intermediate_hash[HashSize / sizeof(u32)];
|
|
u8 m_buffer[BlockSize];
|
|
size_t m_buffered_bytes;
|
|
u64 m_bits_consumed;
|
|
State m_state;
|
|
public:
|
|
Sha256Impl() : m_state(State_None) { /* ... */ }
|
|
~Sha256Impl() {
|
|
ClearMemory(this, sizeof(*this));
|
|
}
|
|
|
|
void Initialize();
|
|
void Update(const void *data, size_t size);
|
|
void GetHash(void *dst, size_t size);
|
|
|
|
void InitializeWithContext(const Sha256Context *context);
|
|
size_t GetContext(Sha256Context *context) const;
|
|
|
|
size_t GetBufferedDataSize() const { return m_buffered_bytes; }
|
|
|
|
void GetBufferedData(void *dst, size_t dst_size) const {
|
|
AMS_ASSERT(dst_size >= this->GetBufferedDataSize());
|
|
AMS_UNUSED(dst_size);
|
|
|
|
std::memcpy(dst, m_buffer, m_buffered_bytes);
|
|
}
|
|
private:
|
|
void ProcessBlock(const void *data);
|
|
void ProcessBlocks(const u8 *data, size_t block_count);
|
|
void ProcessLastBlock();
|
|
};
|
|
|
|
static_assert(HashFunction<Sha256Impl>);
|
|
|
|
}
|