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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* bin2note - a program to insert binary code in an iPod Nano 2nd
* Generation notes file
*
* Based on research by stooo, TheSeven and others.
*
* Copyright (C) 2009 Dave Chapman
*
* 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
static off_t filesize(int fd)
{
struct stat buf;
fstat(fd,&buf);
return buf.st_size;
}
void write_utf16le(unsigned char* buf, int len, FILE* fp)
{
int i;
char tmp[2];
tmp[1] = 0;
for (i=0;i<len;i++) {
tmp[0] = buf[i];
fwrite(tmp, 1, sizeof(tmp), fp);
}
}
void insert_link(unsigned char* buf, uint32_t pointer)
{
char link[] = "<a href=\"AAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAA%xx"
"%xx%xx%xx\"></a>";
char tmp[32];
unsigned int i;
sprintf(tmp, "%%%02x%%%02x%%%02x%%%02x",
pointer & 0xff,
(pointer >> 8) & 0xff,
(pointer >> 16) & 0xff,
(pointer >> 24) & 0xff);
memcpy(link + 0x11d, tmp, 12);
/* UTF-16 little-endian BOM */
buf[0] = 0xff;
buf[1] = 0xfe;
/* UTF-16 little-endian URL */
for (i=0;i<strlen(link);i++) {
buf[i*2+2] = link[i];
buf[i*2+3] = 0;
}
}
#define MAX_NOTES_SIZE 4096
#define MAX_PAYLOAD_SIZE (MAX_NOTES_SIZE - 0x260 - 4)
int main (int argc, char* argv[])
{
char* infile;
char* htmname;
int fdin,fdout;
unsigned char buf[MAX_NOTES_SIZE];
int len;
int n;
int i;
if (argc != 3) {
fprintf(stderr,"Usage: bin2note file.bin file.htm\n");
return 1;
}
infile=argv[1];
htmname=argv[2];
fdin = open(infile,O_RDONLY|O_BINARY);
if (fdin < 0) {
fprintf(stderr,"Can not open %s\n",infile);
return 1;
}
len = filesize(fdin);
if (len > MAX_PAYLOAD_SIZE) {
fprintf(stderr,"Payload too big!\n");
close(fdin);
return 1;
}
/* **** Input file is OK, now build the note **** */
/* Insert URL at start of note */
insert_link(buf, 0x08640568);
/* Load code at offset 0x260 */
n = read(fdin,buf + 0x260,len);
if (n < len) {
fprintf(stderr,"Short read, aborting\n");
return 1;
}
close(fdin);
/* Fill the remaining buffer with NOPs (mov r1,r1) - 0xe1a01001 */
for (i=0x260 + len; i < MAX_NOTES_SIZE-4; i+=4) {
buf[i] = 0x01;
buf[i+1] = 0x10;
buf[i+2] = 0xa0;
buf[i+3] = 0xe1;
}
/* Finally append a branch back to our code - 0x260 in the note */
buf[MAX_NOTES_SIZE-4] = 0x97;
buf[MAX_NOTES_SIZE-3] = 0xfc;
buf[MAX_NOTES_SIZE-2] = 0xff;
buf[MAX_NOTES_SIZE-1] = 0xea;
fdout = open(htmname, O_CREAT|O_TRUNC|O_BINARY|O_WRONLY, 0666);
if (fdout < 0) {
fprintf(stderr,"Could not open output file\n");
return 1;
}
if (write(fdout, buf, sizeof(buf)) != sizeof(buf)) {
fprintf(stderr,"Error writing output file\n");
close(fdout);
return 1;
}
close(fdout);
return 0;
}
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