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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2013 Lorenzo Miori
*
* 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.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <getopt.h>
#include <stdint.h>
#include "common.h"
static char* input_dir = NULL;
static FILE* output_file = NULL;
static struct firmware_data fw;
static void cleanup(void)
{
for (int i = 0; i < YPR0_COMPONENTS_COUNT; i++)
{
free(fw.component_data[i]);
}
}
static void die(int error)
{
if (output_file != NULL)
fclose(output_file);
free(input_dir);
cleanup();
exit(error);
}
int main(int argc, char **argv)
{
FILE* component_handle = NULL;
FILE* rev_info_file = NULL;
int error = 0;
char* tmp_path = malloc(MAX_PATH);
memset(&fw, 0, sizeof(fw));
if (argc < 2)
{
printf(
"Crypts Samsung YP-R0/YP-R1 ROM file format\n"
"Usage: fwcrypt <output ROM file path\n"
);
return 1;
}
input_dir = malloc(MAX_PATH);
input_dir[0] = '\0';
if (argc > 2)
{
strcpy(input_dir, argv[2]);
}
/* open the output file for write */
output_file = fopen(argv[1], "wb");
if (output_file == NULL)
{
fprintf(stderr, "Cannot open file for writing: %m\n");
die(SAMSUNG_WRITE_ERROR);
}
/* write generic header */
join_path(tmp_path, input_dir, "RevisionInfo.txt");
rev_info_file = fopen(tmp_path, "rb");
if (rev_info_file != NULL)
{
for (int i = 0; i < GENERIC_HEADER_LINES; i++)
{
char header[MAX_HEADER_LEN];
error += fgets(header, MAX_HEADER_LEN, rev_info_file) == NULL;
error += fprintf(output_file, "%s", header) != (signed)strlen(header);
}
fclose(rev_info_file);
}
else
{
/* write some generic information */
error += fprintf(output_file, YPR0_VERSION) != strlen(YPR0_VERSION);
error += fprintf(output_file, YPR0_TARGET) != strlen(YPR0_TARGET);
error += fprintf(output_file, YPR0_USER) != strlen(YPR0_USER);
error += fprintf(output_file, YPR0_DIR) != strlen(YPR0_DIR);
error += fprintf(output_file, YPR0_TIME) != strlen(YPR0_TIME);
}
if(error != 0)
{
fprintf(stderr, "Cannot write generic header\n");
die(SAMSUNG_WRITE_ERROR);
}
for (int i = 0; i < YPR0_COMPONENTS_COUNT; i++)
{
join_path(tmp_path, input_dir, firmware_filenames[i]);
component_handle = fopen(tmp_path, "rb");
if (component_handle == NULL)
{
fprintf(stderr, "Error while reading firmware component.\n");
die(SAMSUNG_READ_ERROR);
}
fw.component_size[i] = get_filesize(component_handle);
fw.component_data[i] = malloc(fw.component_size[i] * sizeof(char));
fread(fw.component_data[i], sizeof(char), fw.component_size[i], component_handle);
fclose(component_handle);
/* compute checksum */
md5sum(fw.component_checksum[i], fw.component_data[i], fw.component_size[i]);
printf("%s : size(%ld),checksum(%s)\n", firmware_components[i],
fw.component_size[i], fw.component_checksum[i]);
/* write metadata header to file */
if (fprintf(output_file, "%s : size(%ld),checksum(%s)\n", firmware_components[i],
fw.component_size[i], fw.component_checksum[i]) < 0)
{
fprintf(stderr, "Error writing to output file.\n");
die(SAMSUNG_WRITE_ERROR);
}
}
/* write final data to the firmware file */
for (int i = 0; i < YPR0_COMPONENTS_COUNT; i++)
{
/* the bootloader needs to be patched: add checksum of the components */
if (strcmp("MBoot", firmware_components[i]) == 0)
{
int index=MBOOT_CHECKSUM_OFFSET;
for (int z = 0; z < YPR0_COMPONENTS_COUNT; z++)
{
index += sprintf(fw.component_data[i] + index, "%ld:%s\n",
fw.component_size[z], fw.component_checksum[z]);
}
}
/* crypt data */
cyclic_xor(fw.component_data[i], fw.component_size[i], g_yp_key, sizeof(g_yp_key));
/* write data */
size_t written = fwrite(fw.component_data[i], sizeof(char),
fw.component_size[i], output_file);
if (written != fw.component_size[i])
{
fprintf(stderr, "%s: error writing data to file. Written %ld bytes\n",
firmware_components[i], written);
die(SAMSUNG_WRITE_ERROR);
}
/* padding */
if (i < (YPR0_COMPONENTS_COUNT-1))
fputs("\0\0\0\0", output_file);
}
/* free the big amount of memory and close handles */
die(SAMSUNG_SUCCESS);
}
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