mirror of
https://github.com/DarkMatterCore/nxdumptool.git
synced 2024-11-29 21:52:22 +00:00
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/*
|
|
* aes.c
|
|
*
|
|
* Copyright (c) 2020-2021, DarkMatterCore <pabloacurielz@gmail.com>.
|
|
*
|
|
* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
|
|
*
|
|
* nxdumptool 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.
|
|
*
|
|
* nxdumptool 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/>.
|
|
*/
|
|
|
|
#include "utils.h"
|
|
|
|
size_t aes128XtsNintendoCrypt(Aes128XtsContext *ctx, void *dst, const void *src, size_t size, u64 sector, size_t sector_size, bool encrypt)
|
|
{
|
|
if (!ctx || !dst || !src || !size || !sector_size || (size % sector_size) != 0)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return 0;
|
|
}
|
|
|
|
size_t i, crypt_res = 0;
|
|
u64 cur_sector = sector;
|
|
|
|
u8 *dst_u8 = (u8*)dst;
|
|
const u8 *src_u8 = (const u8*)src;
|
|
|
|
for(i = 0; i < size; i += sector_size, cur_sector++)
|
|
{
|
|
/* We have to force a sector reset on each new sector to actually enable Nintendo AES-XTS cipher tweak. */
|
|
aes128XtsContextResetSector(ctx, cur_sector, true);
|
|
crypt_res = (encrypt ? aes128XtsEncrypt(ctx, dst_u8 + i, src_u8 + i, sector_size) : aes128XtsDecrypt(ctx, dst_u8 + i, src_u8 + i, sector_size));
|
|
if (crypt_res != sector_size) break;
|
|
}
|
|
|
|
return i;
|
|
}
|