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Atmosphere/fusee/fusee-secondary/src/device_partition.h

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C

/*
* Copyright (c) 2018-2019 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/>.
*/
#ifndef FUSEE_DEVICE_PARTITION_H
#define FUSEE_DEVICE_PARTITION_H
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#define DEVPART_IV_MAX_SIZE 16
#define DEVPART_KEY_MAX 2
#define DEVPART_KEY_MAX_SIZE 16
struct device_partition_t;
typedef int (*device_partition_initializer_t)(struct device_partition_t *devpart);
typedef void (*device_partition_finalizer_t)(struct device_partition_t *devpart);
/* Note: only random-access ciphers supporting in-place encryption/decryption are supported */
typedef int (*device_partition_cipher_t)(struct device_partition_t *devpart, uint64_t sector, uint64_t num_sectors);
typedef int (*device_partition_reader_t)(struct device_partition_t *devpart, void *dst, uint64_t sector, uint64_t num_sectors);
typedef int (*device_partition_writer_t)(struct device_partition_t *devpart, const void *src, uint64_t sector, uint64_t num_sectors);
typedef enum DevicePartitionCryptoMode {
DevicePartitionCryptoMode_None,
DevicePartitionCryptoMode_Ctr,
DevicePartitionCryptoMode_Xts,
} DevicePartitionCryptoMode;
typedef struct device_partition_t {
size_t sector_size; /* The size of a sector */
uint64_t start_sector; /* Offset in the parent device, in sectors. */
uint64_t num_sectors; /* Maximum size of the partition, in sectors (optional). */
device_partition_cipher_t read_cipher; /* Cipher for read operations. */
device_partition_cipher_t write_cipher; /* Cipher for write operations. */
DevicePartitionCryptoMode crypto_mode; /* Mode to use for cryptographic operations. */
device_partition_initializer_t initializer; /* Initializer. */
device_partition_finalizer_t finalizer; /* Finalizer. */
device_partition_reader_t reader; /* Reader. */
device_partition_writer_t writer; /* Writer. */
void *device_struct; /* Pointer to struct for additional info. */
void *crypto_work_buffer; /* Work buffer for crypto. */
uint64_t crypto_work_buffer_num_sectors; /* Size of the crypto work buffer in sectors. */
uint8_t __attribute__((aligned(16))) keys[DEVPART_KEY_MAX][DEVPART_KEY_MAX_SIZE]; /* Key. */
uint8_t __attribute__((aligned(16))) iv[DEVPART_IV_MAX_SIZE]; /* IV. */
bool initialized;
char *emu_file_path; /* Emulated device file path. */
bool emu_use_file;
} device_partition_t;
int device_partition_read_data(device_partition_t *devpart, void *dst, uint64_t sector, uint64_t num_sectors);
int device_partition_write_data(device_partition_t *devpart, const void *src, uint64_t sector, uint64_t num_sectors);
int emu_device_partition_read_data(device_partition_t *devpart, void *dst, uint64_t sector, uint64_t num_sectors, const char *origin_path, int num_parts, uint64_t part_limit);
int emu_device_partition_write_data(device_partition_t *devpart, const void *src, uint64_t sector, uint64_t num_sectors, const char *origin_path, int num_parts, uint64_t part_limit);
#endif