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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.
*
****************************************************************************/
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <ctype.h>
#include "misc.h"
#include "crypto.h"
#include "rsrc.h"
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
const char crypto_key[16] = "SanDiskSlotRadi";
static void rsrc_crypt(void *buf, int size)
{
if(size % 16)
printf("Size must be a multiple of 16 !\n");
uint8_t *p = buf;
for(int i = 0; i < size; i+= 16, p += 16)
{
for(int j = 0; j < 16; j++)
p[j] ^= crypto_key[j];
}
}
enum rsrc_error_t rsrc_write_file(struct rsrc_file_t *rsrc, const char *filename)
{
FILE *f = fopen(filename, "wb");
if(f == NULL)
return RSRC_OPEN_ERROR;
fwrite(rsrc->data, 1, rsrc->size, f);
fclose(f);
return RSRC_SUCCESS;
}
struct rsrc_file_t *rsrc_read_file(const char *filename, void *u,
rsrc_color_printf cprintf, enum rsrc_error_t *err)
{
return rsrc_read_file_ex(filename, 0, -1, u, cprintf, err);
}
struct rsrc_file_t *rsrc_read_file_ex(const char *filename, size_t offset, size_t size, void *u,
rsrc_color_printf cprintf, enum rsrc_error_t *err)
{
#define fatal(e, ...) \
do { if(err) *err = e; \
cprintf(u, true, GREY, __VA_ARGS__); \
free(buf); \
return NULL; } while(0)
FILE *f = fopen(filename, "rb");
void *buf = NULL;
if(f == NULL)
fatal(RSRC_OPEN_ERROR, "Cannot open file for reading\n");
fseek(f, 0, SEEK_END);
size_t read_size = ftell(f);
fseek(f, offset, SEEK_SET);
if(size != (size_t)-1)
read_size = size;
buf = xmalloc(read_size);
if(fread(buf, read_size, 1, f) != 1)
{
fclose(f);
fatal(RSRC_READ_ERROR, "Cannot read file\n");
}
fclose(f);
struct rsrc_file_t *ret = rsrc_read_memory(buf, read_size, u, cprintf, err);
free(buf);
return ret;
#undef fatal
}
static const char *rsrc_table_entry_type_str(int type)
{
switch(type)
{
case RSRC_TYPE_NONE: return "empty";
case RSRC_TYPE_NESTED: return "nested";
case RSRC_TYPE_IMAGE: return "image";
case RSRC_TYPE_VALUE: return "value";
case RSRC_TYPE_AUDIO: return "audio";
case RSRC_TYPE_DATA: return "data";
default: return "unknown";
}
}
static bool read_entries(struct rsrc_file_t *f, void *u,
rsrc_color_printf cprintf, enum rsrc_error_t *err,
int offset, uint32_t base_index, int level, char *prefix)
{
#define printf(c, ...) cprintf(u, false, c, __VA_ARGS__)
#define fatal(e, ...) \
do { if(err) *err = e; \
cprintf(u, true, GREY, __VA_ARGS__); \
return e; } while(0)
if(offset >= f->size)
fatal(RSRC_FORMAT_ERROR, "Out of bounds at off=%x base=%x level=%d\n ouch\n");
if(level < 0)
fatal(RSRC_FORMAT_ERROR, "Out of levels at off=%x base=%x level=%d\n aie\n");
for(int i = 0; i < 256; i++)
{
uint32_t te = *(uint32_t *)(f->data + offset + 4 * i);
if(RSRC_TABLE_ENTRY_TYPE(te) == RSRC_TYPE_NONE)
continue;
uint32_t sz = 0;
uint32_t off_off = 0;
if(RSRC_TABLE_ENTRY_TYPE(te) == RSRC_TYPE_VALUE)
sz = 2;
else if(RSRC_TABLE_ENTRY_TYPE(te) == RSRC_TYPE_NESTED)
sz = 4 * 256;
else
{
sz = *(uint32_t *)(f->data + RSRC_TABLE_ENTRY_OFFSET(te));
off_off = 4;
}
uint32_t index = base_index | i << (level * 8);
struct rsrc_entry_t ent;
memset(&ent, 0, sizeof(ent));
ent.id = index;
ent.offset = RSRC_TABLE_ENTRY_OFFSET(te) + off_off;
ent.size = sz;
augment_array_ex((void **)&f->entries, sizeof(ent), &f->nr_entries, &f->capacity, &ent, 1);
printf(OFF, "%s+-%s%#08x %s[%s]%s[size=%#x]", prefix, YELLOW, index, BLUE,
rsrc_table_entry_type_str(RSRC_TABLE_ENTRY_TYPE(te)),
GREEN, sz);
if(RSRC_TABLE_ENTRY_TYPE(te) != RSRC_TYPE_VALUE &&
RSRC_TABLE_ENTRY_TYPE(te) == RSRC_TYPE_NESTED)
{
uint8_t *p = f->data + ent.offset;
printf(OFF, " ");
for(unsigned i = 0; i < MIN(sz, 16); i++)
printf(RED, "%c", isprint(p[i]) ? p[i] : '.');
}
printf(OFF, "\n");
if(RSRC_TABLE_ENTRY_TYPE(te) == RSRC_TYPE_NESTED)
{
char *p = prefix + strlen(prefix);
sprintf(p, "%s| ", RED);
bool ok = read_entries(f, u, cprintf, err,
RSRC_TABLE_ENTRY_OFFSET(te), index,
level - 1, prefix);
if(!ok)
return false;
*p = 0;
}
}
return true;
#undef printf
#undef fatal
}
struct rsrc_file_t *rsrc_read_memory(void *_buf, size_t filesize, void *u,
rsrc_color_printf cprintf, enum rsrc_error_t *err)
{
struct rsrc_file_t *rsrc_file = NULL;
uint8_t *buf = _buf;
#define printf(c, ...) cprintf(u, false, c, __VA_ARGS__)
#define fatal(e, ...) \
do { if(err) *err = e; \
cprintf(u, true, GREY, __VA_ARGS__); \
rsrc_free(rsrc_file); \
return NULL; } while(0)
#define print_hex(c, p, len, nl) \
do { printf(c, ""); print_hex(p, len, nl); } while(0)
rsrc_file = xmalloc(sizeof(struct rsrc_file_t));
memset(rsrc_file, 0, sizeof(struct rsrc_file_t));
/* There is a padding sector at the beginning of the file with a RSRC string.
* It is unclear if this is a signature since no code I've disassembled
* actually checks it. Allow use of -force to bypass. */
if(memcmp(buf + 20, "RSRC", 4) != 0)
{
if(g_force)
printf(GREY, "Missing RSRC signature\n");
else
fatal(RSRC_FORMAT_ERROR, "Missing RSRC signature\n");
}
rsrc_file->data = malloc(filesize);
memcpy(rsrc_file->data, _buf, filesize);
rsrc_file->size = filesize;
printf(BLUE, "Entries\n");
char prefix[1024];
sprintf(prefix, "%s", RED);
bool ok = read_entries(rsrc_file, u, cprintf, err, RSRC_SECTOR_SIZE, 0, 3, prefix);
if(!ok)
fatal(*err, "Error while parsing rsrc table\n");
return rsrc_file;
#undef printf
#undef fatal
#undef print_hex
}
void rsrc_free(struct rsrc_file_t *file)
{
if(!file) return;
free(file->data);
free(file->entries);
free(file);
}
void rsrc_dump(struct rsrc_file_t *file, void *u, rsrc_color_printf cprintf)
{
#define printf(c, ...) cprintf(u, false, c, __VA_ARGS__)
#define print_hex(c, p, len, nl) \
do { printf(c, ""); print_hex(p, len, nl); } while(0)
#define TREE RED
#define HEADER GREEN
#define TEXT YELLOW
#define TEXT2 BLUE
#define SEP OFF
printf(HEADER, "RSRC File\n");
(void) file;
#undef printf
#undef print_hex
}
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