mirror of
https://github.com/DarkMatterCore/nxdumptool.git
synced 2024-11-23 02:36:41 +00:00
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/*
|
|
* aes.c
|
|
*
|
|
* Copyright (c) 2020-2022, 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 of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* nxdumptool is distributed in the hope that 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 <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "nxdt_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)
|
|
{
|
|
LOG_MSG_ERROR("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;
|
|
}
|