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74 lines
3.1 KiB
C
74 lines
3.1 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FUSEE_DEVICE_PARTITION_H
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#define FUSEE_DEVICE_PARTITION_H
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#define DEVPART_IV_MAX_SIZE 16
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#define DEVPART_KEY_MAX 2
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#define DEVPART_KEY_MAX_SIZE 16
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struct device_partition_t;
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typedef int (*device_partition_initializer_t)(struct device_partition_t *devpart);
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typedef void (*device_partition_finalizer_t)(struct device_partition_t *devpart);
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/* Note: only random-access ciphers supporting in-place encryption/decryption are supported */
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typedef int (*device_partition_cipher_t)(struct device_partition_t *devpart, uint64_t sector, uint64_t num_sectors);
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typedef int (*device_partition_reader_t)(struct device_partition_t *devpart, void *dst, uint64_t sector, uint64_t num_sectors);
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typedef int (*device_partition_writer_t)(struct device_partition_t *devpart, const void *src, uint64_t sector, uint64_t num_sectors);
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typedef enum DevicePartitionCryptoMode {
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DevicePartitionCryptoMode_None,
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DevicePartitionCryptoMode_Ctr,
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DevicePartitionCryptoMode_Xts,
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} DevicePartitionCryptoMode;
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typedef struct device_partition_t {
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size_t sector_size; /* The size of a sector */
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uint64_t start_sector; /* Offset in the parent device, in sectors. */
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uint64_t num_sectors; /* Maximum size of the partition, in sectors (optional). */
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device_partition_cipher_t read_cipher; /* Cipher for read operations. */
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device_partition_cipher_t write_cipher; /* Cipher for write operations. */
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DevicePartitionCryptoMode crypto_mode; /* Mode to use for cryptographic operations. */
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device_partition_initializer_t initializer; /* Initializer. */
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device_partition_finalizer_t finalizer; /* Finalizer. */
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device_partition_reader_t reader; /* Reader. */
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device_partition_writer_t writer; /* Writer. */
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void *device_struct; /* Pointer to struct for additional info. */
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void *crypto_work_buffer; /* Work buffer for crypto. */
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uint64_t crypto_work_buffer_num_sectors; /* Size of the crypto work buffer in sectors. */
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uint8_t __attribute__((aligned(16))) keys[DEVPART_KEY_MAX][DEVPART_KEY_MAX_SIZE]; /* Key. */
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uint8_t __attribute__((aligned(16))) iv[DEVPART_IV_MAX_SIZE]; /* IV. */
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bool initialized;
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} device_partition_t;
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int device_partition_read_data(device_partition_t *devpart, void *dst, uint64_t sector, uint64_t num_sectors);
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int device_partition_write_data(device_partition_t *devpart, const void *src, uint64_t sector, uint64_t num_sectors);
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#endif
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