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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 <stdbool.h>
#include <stdlib.h>
#include <string.h>
#if !defined(__APPLE__)
#include <elf.h>
#else
#include "mac-elf.h" /* Mac OS X doesn't distribuate elf.h... */
#endif
#include "creative.h"
#include "hmac-sha1.h"
static const char null_key_v1[] = "CTL:N0MAD|PDE0.SIGN.";
static const char null_key_v2[] = "CTL:N0MAD|PDE0.DPMP.";
static const char null_key_v3[] = "CTL:Z3N07|PDE0.DPMP.";
static const char null_key_v4[] = "CTL:N0MAD|PDE0.DPFP.";
static const struct device_info devices[] =
{
/* Creative Zen Vision:M */
{"C\0r\0e\0a\0t\0i\0v\0e\0 \0Z\0e\0n\0 \0V\0i\0s\0i\0o\0n\0:\0M", 42, null_key_v2},
/* Creative Zen Vision:M Go! */
{"C\0r\0e\0a\0t\0i\0v\0e\0 \0Z\0e\0n\0 \0V\0i\0s\0i\0o\0n\0:\0M\0 \0G\0o\0!", 50, null_key_v2},
/* Creative Zen Vision © TL */
/* The "©" should be ANSI encoded or the device won't accept the firmware package. */
{"C\0r\0e\0a\0t\0i\0v\0e\0 \0Z\0e\0n\0 \0V\0i\0s\0i\0o\0n\0 \0©\0T\0L", 46, null_key_v2},
/* Creative ZEN V */
{"C\0r\0e\0a\0t\0i\0v\0e\0 \0Z\0E\0N\0 \0V", 42, null_key_v4},
/* Creative ZEN */
{"C\0r\0e\0a\0t\0i\0v\0e\0 \0Z\0E\0N", 48, null_key_v3}
};
/*
Create a Zen Vision:M FRESCUE structure file
*/
extern void int2le(unsigned int val, unsigned char* addr);
extern unsigned int le2int(unsigned char* buf);
static int make_ciff_file(const unsigned char *inbuf, unsigned int length,
unsigned char *outbuf, int device)
{
unsigned char key[20];
memcpy(outbuf, "FFIC", 4);
int2le(length+90, &outbuf[4]);
memcpy(&outbuf[8], "FNIC", 4);
int2le(96, &outbuf[0xC]);
memcpy(&outbuf[0x10], devices[device].cinf, devices[device].cinf_size);
memset(&outbuf[0x10+devices[device].cinf_size], 0,
96 - devices[device].cinf_size);
memcpy(&outbuf[0x70], "ATAD", 4);
int2le(length+32, &outbuf[0x74]);
memcpy(&outbuf[0x78], "H\0j\0u\0k\0e\0b\0o\0x\0\x32\0.\0j\0r\0m",
25); /*Unicode encoded*/
memset(&outbuf[0x78+25], 0, 32);
memcpy(&outbuf[0x98], inbuf, length);
memcpy(&outbuf[0x98+length], "LLUN", 4);
int2le(20, &outbuf[0x98+length+4]);
/* Do checksum */
hmac_sha1((unsigned char *)devices[device].null, strlen(devices[device].null),
outbuf, 0x98+length, key);
memcpy(&outbuf[0x98+length+8], key, 20);
return length+0x90+0x1C+8;
}
static int elf_convert(const unsigned char *inbuf, unsigned char *outbuf)
{
Elf32_Ehdr *main_header;
Elf32_Shdr *section_header;
unsigned int i, j, sum;
intptr_t startaddr;
main_header = (Elf32_Ehdr*)inbuf;
if( !( main_header->e_ident[0] == ELFMAG0 && main_header->e_ident[1] == ELFMAG1
&& main_header->e_ident[2] == ELFMAG2 && main_header->e_ident[3] == ELFMAG3 ) )
{
printf("Invalid ELF header!\n");
return -1;
}
startaddr = (intptr_t)outbuf;
for(i = 0; i < main_header->e_shnum; i++)
{
section_header = (Elf32_Shdr*)(inbuf+main_header->e_shoff+i*sizeof(Elf32_Shdr));
if( (section_header->sh_flags & SHF_WRITE || section_header->sh_flags & SHF_ALLOC
|| section_header->sh_flags & SHF_EXECINSTR) && section_header->sh_size > 0
&& section_header->sh_type != SHT_NOBITS )
{
/* Address */
int2le(section_header->sh_addr, outbuf);
outbuf += 4;
/* Size */
int2le(section_header->sh_size, outbuf);
outbuf += 4;
/* Checksum */
sum = 0;
for(j=0; j<section_header->sh_size; j+= 4)
sum += le2int((unsigned char*)(inbuf+section_header->sh_offset+j)) + (le2int((unsigned char*)(inbuf+section_header->sh_offset+j))>>16);
int2le(sum, outbuf);
outbuf += 2;
memset(outbuf, 0, 2);
outbuf += 2;
/* Data */
memcpy(outbuf, inbuf+section_header->sh_offset, section_header->sh_size);
outbuf += section_header->sh_size;
}
}
return (int)((intptr_t)outbuf - startaddr);
}
static int make_jrm_file(const unsigned char *inbuf, unsigned char *outbuf)
{
int length;
/* Clear the header area to zero */
memset(outbuf, 0, 0x18);
/* Header (EDOC) */
memcpy(outbuf, "EDOC", 4);
/* Total Size: temporarily set to 0 */
memset(&outbuf[0x4], 0, 4);
/* 4 bytes of zero */
memset(&outbuf[0x8], 0, 4);
length = elf_convert(inbuf, &outbuf[0xC]);
if(length < 0)
return -1;
/* Now set the actual Total Size */
int2le(4+length, &outbuf[0x4]);
return 0xC+length;
}
int zvm_encode(const char *iname, const char *oname, int device)
{
size_t len;
int length;
FILE *file;
unsigned char *outbuf;
unsigned char *buf;
file = fopen(iname, "rb");
if (!file) {
perror(iname);
return -1;
}
fseek(file, 0, SEEK_END);
length = ftell(file);
fseek(file, 0, SEEK_SET);
buf = (unsigned char*)malloc(length);
if ( !buf ) {
printf("Out of memory!\n");
return -1;
}
len = fread(buf, 1, length, file);
if(len < (size_t)length) {
perror(iname);
return -2;
}
fclose(file);
outbuf = (unsigned char*)malloc(length+0x300);
if ( !outbuf ) {
free(buf);
printf("Out of memory!\n");
return -1;
}
length = make_jrm_file(buf, outbuf);
free(buf);
if(length < 0)
{
free(outbuf);
printf("Error in making JRM file!\n");
return -1;
}
buf = (unsigned char*)malloc(length+0x200);
memset(buf, 0, length+0x200);
length = make_ciff_file(outbuf, length, buf, device);
free(outbuf);
file = fopen(oname, "wb");
if (!file) {
free(buf);
perror(oname);
return -3;
}
len = fwrite(buf, 1, length, file);
if(len < (size_t)length) {
free(buf);
perror(oname);
return -4;
}
free(buf);
fclose(file);
return 0;
}
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