mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-15 01:26:34 +00:00
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/*
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* Copyright (c) 2018 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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#include <string.h>
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#include "device_partition.h"
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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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{
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int rc;
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if (!devpart->initialized) {
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rc = devpart->initializer(devpart);
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if (rc != 0) {
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return rc;
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}
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}
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if (devpart->read_cipher != NULL && devpart->crypto_mode != DevicePartitionCryptoMode_None) {
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for (uint64_t i = 0; i < num_sectors; i += devpart->crypto_work_buffer_num_sectors) {
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uint64_t n = (i + devpart->crypto_work_buffer_num_sectors > num_sectors) ? (num_sectors - i) : devpart->crypto_work_buffer_num_sectors;
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rc = devpart->reader(devpart, devpart->crypto_work_buffer, sector + i, n);
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if (rc != 0) {
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return rc;
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}
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rc = devpart->read_cipher(devpart, sector + i, n);
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if (rc != 0) {
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return rc;
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}
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memcpy(dst + (size_t)(devpart->sector_size * i), devpart->crypto_work_buffer, (size_t)(devpart->sector_size * n));
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}
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return 0;
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} else {
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return devpart->reader(devpart, dst, sector, num_sectors);
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}
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}
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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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{
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int rc;
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if (!devpart->initialized) {
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rc = devpart->initializer(devpart);
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if (rc != 0) {
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return rc;
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}
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}
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if (devpart->read_cipher != NULL && devpart->crypto_mode != DevicePartitionCryptoMode_None) {
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for (uint64_t i = 0; i < num_sectors; i += devpart->crypto_work_buffer_num_sectors) {
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uint64_t n = (i + devpart->crypto_work_buffer_num_sectors > num_sectors) ? (num_sectors - i) : devpart->crypto_work_buffer_num_sectors;
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memcpy(devpart->crypto_work_buffer, src + (size_t)(devpart->sector_size * i), (size_t)(devpart->sector_size * n));
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rc = devpart->write_cipher(devpart, sector + i, n);
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if (rc != 0) {
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return rc;
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}
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rc = devpart->writer(devpart, devpart->crypto_work_buffer, sector + i, n);
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if (rc != 0) {
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return rc;
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}
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}
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return 0;
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} else {
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return devpart->writer(devpart, src, sector, num_sectors);
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}
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}
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