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fs: Implement AesXtsStorage

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This commit is contained in:
Michael Scire
2020-04-06 05:44:33 -07:00
parent b2e86f5a1b
commit d98490d339
5 changed files with 275 additions and 1 deletions
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1
libraries/libstratosphere/include/stratosphere/fssystem.hpp
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@@ -22,6 +22,7 @@
#include <stratosphere/fssystem/fssystem_path_tool.hpp>
#include <stratosphere/fssystem/fssystem_thread_priority_changer.hpp>
#include <stratosphere/fssystem/fssystem_aes_ctr_storage.hpp>
#include <stratosphere/fssystem/fssystem_aes_xts_storage.hpp>
#include <stratosphere/fssystem/fssystem_subdirectory_filesystem.hpp>
#include <stratosphere/fssystem/fssystem_directory_redirection_filesystem.hpp>
#include <stratosphere/fssystem/fssystem_directory_savedata_filesystem.hpp>

51
libraries/libstratosphere/include/stratosphere/fssystem/fssystem_aes_xts_storage.hpp Normal file
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@@ -0,0 +1,51 @@
/*
* 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.hpp>
#include <stratosphere/fs/fs_istorage.hpp>
#include <stratosphere/fs/impl/fs_newable.hpp>
#include <stratosphere/os.hpp>
namespace ams::fssystem {
class AesXtsStorage : public ::ams::fs::IStorage, public ::ams::fs::impl::Newable {
NON_COPYABLE(AesXtsStorage);
NON_MOVEABLE(AesXtsStorage);
public:
static constexpr size_t AesBlockSize = crypto::Aes128XtsEncryptor::BlockSize;
static constexpr size_t KeySize = crypto::Aes128XtsEncryptor::KeySize;
static constexpr size_t IvSize = crypto::Aes128XtsEncryptor::IvSize;
private:
IStorage * const base_storage;
char key[2][KeySize];
char iv[IvSize];
const size_t block_size;
os::Mutex mutex;
public:
AesXtsStorage(IStorage *base, const void *key1, const void *key2, size_t key_size, const void *iv, size_t iv_size, size_t block_size);
virtual Result Read(s64 offset, void *buffer, size_t size) override;
virtual Result Write(s64 offset, const void *buffer, size_t size) override;
virtual Result Flush() override;
virtual Result SetSize(s64 size) override;
virtual Result GetSize(s64 *out) override;
virtual Result OperateRange(void *dst, size_t dst_size, fs::OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) override;
};
}