mirror of
https://git.proxmox.com/git/fwupd
synced 2025-05-24 15:05:45 +00:00
9b0d228ed9
This gets the firmware version from the Nitrokey storage device but does not enable the firmware upgrade mechanism.
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
|
|
*
|
|
* Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
|
|
*
|
|
* Licensed under the GNU General Public License Version 2
|
|
*
|
|
* This program 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 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "fu-nitrokey-common.h"
|
|
|
|
static guint32
|
|
fu_nitrokey_perform_crc32_mutate (guint32 crc, guint32 data)
|
|
{
|
|
crc = crc ^ data;
|
|
for (guint i = 0; i < 32; i++) {
|
|
if (crc & 0x80000000) {
|
|
/* polynomial used in STM32 */
|
|
crc = (crc << 1) ^ 0x04C11DB7;
|
|
} else {
|
|
crc = (crc << 1);
|
|
}
|
|
}
|
|
return crc;
|
|
}
|
|
|
|
guint32
|
|
fu_nitrokey_perform_crc32 (const guint8 *data, gsize size)
|
|
{
|
|
guint32 crc = 0xffffffff;
|
|
g_autofree guint32 *data_aligned = NULL;
|
|
data_aligned = g_new0 (guint32, (size / 4) + 1);
|
|
memcpy (data_aligned, data, size);
|
|
for (gsize idx = 0; idx * 4 < size; idx++) {
|
|
guint32 data_aligned_le = GUINT32_FROM_LE (data_aligned[idx]);
|
|
crc = fu_nitrokey_perform_crc32_mutate (crc, data_aligned_le);
|
|
}
|
|
return crc;
|
|
}
|