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Introduce samsungtools to decrypt samsung firmware

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Samsung provides many firmware upgrade in the format of a .dat
file, at least for nearly all YP's (checked for Q2, R0, T10, Z5).
This is a simple cyclic xor which a fixed key, a md5 sum and a
header specifying the model/version/region.

Change-Id: Ib0461a74196383189fd2d8162da444a85a229c60
This commit is contained in:
Amaury Pouly 2012-11-29 17:29:13 +01:00
parent ee36a396cd
commit d66c16749a
4 changed files with 353 additions and 0 deletions
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78
utils/samsungtools/samsung.h Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2012 Amaury Pouly
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __SAMSUNG_H__
#define __SAMSUNG_H__
#include <stdint.h>
#include <stdbool.h>
/**
* Low-Level
*/
struct yp_header_t
{
char signature[12];
uint32_t pad;
char version[8];
char region[4];
char extra[4];
char model[20];
uint32_t datasize;
} __attribute__((packed));
struct yp_md5_t
{
uint8_t md5[16];
} __attribute__((packed));
#define YP_SIGNATURE "SAMSUNG YEPP"
/**
* API
*/
struct samsung_firmware_t
{
char version[8];
char region[4];
char extra[4];
char model[20];
void *data;
int data_size;
};
enum samsung_error_t
{
SAMSUNG_SUCCESS = 0,
SAMSUNG_READ_ERROR = -1,
SAMSUNG_FORMAT_ERROR = -2,
SAMSUNG_MD5_ERROR = -3,
};
typedef int (*samsung_read_t)(void *user, int offset, void *buffer, int size);
typedef void (*samsung_printf_t)(void *user, bool error, const char *fmt, ...);
struct samsung_firmware_t *samsung_read(samsung_read_t read,
samsung_printf_t printf, void *user, enum samsung_error_t *err);
void samsung_free(struct samsung_firmware_t *fw);
#endif /* __SAMSUNG_H__ */