afecfe46f3
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17060 a1c6a512-1295-4272-9138-f99709370657
379 lines
11 KiB
C
379 lines
11 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2004 by Dave Hooper
|
|
*
|
|
* This particular source code file is licensed under the X11 license. See the
|
|
* bottom of the COPYING file for details on this license.
|
|
*
|
|
* Original code from http://www.beermex.com/@spc/ihpfirm.src.zip
|
|
* Details at http://www.rockbox.org/twiki/bin/view/Main/IriverToolsGuide
|
|
*
|
|
****************************************************************************/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "iriver.h"
|
|
|
|
const unsigned char munge[] = {
|
|
0x7a, 0x36, 0xc4, 0x43, 0x49, 0x6b, 0x35, 0x4e, 0xa3, 0x46, 0x25, 0x84,
|
|
0x4d, 0x73, 0x74, 0x61
|
|
};
|
|
|
|
const unsigned char header_modify[] = "* IHPFIRM-DECODED ";
|
|
|
|
const char * const models[] = { "iHP-100", "iHP-120/iHP-140", "H300 series",
|
|
NULL };
|
|
|
|
/* aligns with models array; expected min firmware size */
|
|
const unsigned int firmware_minsize[] = { 0x100000, 0x100000, 0x200000 };
|
|
/* aligns with models array; expected max firmware size */
|
|
const unsigned int firmware_maxsize[] = { 0x200000, 0x200000, 0x400000 };
|
|
|
|
const unsigned char header[][16] = {
|
|
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 },
|
|
{ 0x20, 0x03, 0x08, 0x27, 0x24, 0x00, 0x02, 0x30, 0x19, 0x17, 0x65, 0x73,
|
|
0x85, 0x32, 0x83, 0x22 },
|
|
{ 0x20, 0x04, 0x03, 0x27, 0x20, 0x50, 0x01, 0x70, 0x80, 0x30, 0x80, 0x06,
|
|
0x30, 0x19, 0x17, 0x65 }
|
|
};
|
|
|
|
static int testheader( const unsigned char * const data )
|
|
{
|
|
const unsigned char * const d = data+16;
|
|
const char * const * m = models;
|
|
int ind = 0;
|
|
while( *m )
|
|
{
|
|
if( memcmp( header[ ind ], d, 16 ) == 0 )
|
|
return ind;
|
|
ind++;
|
|
m++;
|
|
};
|
|
return -1;
|
|
}
|
|
|
|
static void modifyheader( unsigned char * data )
|
|
{
|
|
const unsigned char * h = header_modify;
|
|
int i;
|
|
for( i=0; i<512; i++ )
|
|
{
|
|
if( *h == '\0' )
|
|
h = header_modify;
|
|
*data++ ^= *h++;
|
|
};
|
|
}
|
|
|
|
static FILE * openinfile( const char * filename )
|
|
{
|
|
FILE * F = fopen( filename, "rb" );
|
|
if( F == NULL )
|
|
{
|
|
fprintf( stderr, "Couldn't open input file %s\n", filename );
|
|
perror( "Error was " );
|
|
exit( -1 );
|
|
};
|
|
return F;
|
|
}
|
|
|
|
static FILE * openoutfile( const char * filename )
|
|
{
|
|
FILE * F = fopen( filename, "wb" );
|
|
if( F == NULL )
|
|
{
|
|
fprintf( stderr, "Couldn't open output file %s\n", filename );
|
|
perror( "Error was " );
|
|
exit( -1 );
|
|
};
|
|
return F;
|
|
}
|
|
|
|
int iriver_decode(char *infile_name, char *outfile_name, BOOL modify,
|
|
enum striptype stripmode )
|
|
{
|
|
FILE * infile = NULL;
|
|
FILE * outfile = NULL;
|
|
int i = -1;
|
|
unsigned char headerdata[512];
|
|
unsigned long dwLength1, dwLength2, dwLength3, fp = 0;
|
|
unsigned char blockdata[16+16];
|
|
unsigned char out[16];
|
|
unsigned char newmunge;
|
|
signed long lenread;
|
|
int s = 0;
|
|
unsigned char * pChecksums, * ppChecksums = 0;
|
|
unsigned char ck;
|
|
|
|
infile = openinfile(infile_name);
|
|
outfile = openoutfile(outfile_name);
|
|
|
|
lenread = fread( headerdata, 1, 512, infile );
|
|
if( lenread != 512 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid encrypted iHP "
|
|
"firmware - reason: header length\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
i = testheader( headerdata );
|
|
if( i == -1 )
|
|
{
|
|
fprintf( stderr, "This firmware is for an unknown model, or is not"
|
|
" a valid encrypted iHP firmware\n" );
|
|
exit( -1 );
|
|
};
|
|
fprintf( stderr, "Model %s\n", models[ i ] );
|
|
|
|
dwLength1 = headerdata[0] | (headerdata[1]<<8) |
|
|
(headerdata[2]<<16) | (headerdata[3]<<24);
|
|
dwLength2 = headerdata[4] | (headerdata[5]<<8) |
|
|
(headerdata[6]<<16) | (headerdata[7]<<24);
|
|
dwLength3 = headerdata[8] | (headerdata[9]<<8) |
|
|
(headerdata[10]<<16) | (headerdata[11]<<24);
|
|
|
|
if( dwLength1 < firmware_minsize[ i ] ||
|
|
dwLength1 > firmware_maxsize[ i ] ||
|
|
dwLength2 < firmware_minsize[ i ] ||
|
|
dwLength2 > dwLength1 ||
|
|
dwLength3 > dwLength1 ||
|
|
dwLength2>>9 != dwLength3 ||
|
|
dwLength2+dwLength3+512 != dwLength1 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid encrypted "
|
|
"iHP firmware - reason: file 'length' data\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
pChecksums = ppChecksums = (unsigned char *)( malloc( dwLength3 ) );
|
|
|
|
if( modify )
|
|
{
|
|
modifyheader( headerdata );
|
|
};
|
|
|
|
if( stripmode == STRIP_NONE )
|
|
fwrite( headerdata, 512, 1, outfile );
|
|
|
|
memset( blockdata, 0, 16 );
|
|
|
|
ck = 0;
|
|
while( ( fp < dwLength2 ) &&
|
|
( lenread = fread( blockdata+16, 1, 16, infile ) ) == 16 )
|
|
{
|
|
fp += 16;
|
|
|
|
for( i=0; i<16; ++i )
|
|
{
|
|
newmunge = blockdata[16+i] ^ munge[i];
|
|
out[i] = newmunge ^ blockdata[i];
|
|
blockdata[i] = newmunge;
|
|
ck += out[i];
|
|
}
|
|
|
|
if( fp > ESTF_SIZE || stripmode != STRIP_HEADER_CHECKSUM_ESTF )
|
|
{
|
|
fwrite( out+4, 1, 12, outfile );
|
|
fwrite( out, 1, 4, outfile );
|
|
}
|
|
else
|
|
{
|
|
if( ESTF_SIZE - fp < 16 )
|
|
{
|
|
memcpy( out+4, blockdata+16, 12 );
|
|
memcpy( out, blockdata+28, 4 );
|
|
fwrite( blockdata+16+ESTF_SIZE-fp, 1, ESTF_SIZE-fp, outfile );
|
|
}
|
|
}
|
|
|
|
|
|
if( s == 496 )
|
|
{
|
|
s = 0;
|
|
memset( blockdata, 0, 16 );
|
|
*ppChecksums++ = ck;
|
|
ck = 0;
|
|
}
|
|
else
|
|
s+=16;
|
|
};
|
|
|
|
if( fp != dwLength2 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid encrypted "
|
|
"iHP firmware - reason: 'length2' mismatch\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
fp = 0;
|
|
ppChecksums = pChecksums;
|
|
while( ( fp < dwLength3 ) &&
|
|
( lenread = fread( blockdata, 1, 32, infile ) ) > 0 )
|
|
{
|
|
fp += lenread;
|
|
if( stripmode == STRIP_NONE )
|
|
fwrite( blockdata, 1, lenread, outfile );
|
|
if( memcmp( ppChecksums, blockdata, lenread ) != 0 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid encrypted "
|
|
"iHP firmware - reason: Checksum mismatch!" );
|
|
exit( -1 );
|
|
};
|
|
ppChecksums += lenread;
|
|
};
|
|
|
|
if( fp != dwLength3 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid encrypted "
|
|
"iHP firmware - reason: 'length3' mismatch\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
|
|
fprintf( stderr, "File decoded correctly and all checksums matched!\n" );
|
|
switch( stripmode )
|
|
{
|
|
default:
|
|
case STRIP_NONE:
|
|
fprintf(stderr, "Output file contains all headers and "
|
|
"checksums\n");
|
|
break;
|
|
case STRIP_HEADER_CHECKSUM:
|
|
fprintf( stderr, "NB: output file contains only ESTFBINR header"
|
|
" and decoded firmware code\n" );
|
|
break;
|
|
case STRIP_HEADER_CHECKSUM_ESTF:
|
|
fprintf( stderr, "NB: output file contains only raw decoded "
|
|
"firmware code\n" );
|
|
break;
|
|
};
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iriver_encode(char *infile_name, char *outfile_name, BOOL modify )
|
|
{
|
|
FILE * infile = NULL;
|
|
FILE * outfile = NULL;
|
|
int i = -1;
|
|
unsigned char headerdata[512];
|
|
unsigned long dwLength1, dwLength2, dwLength3, fp = 0;
|
|
unsigned char blockdata[16+16];
|
|
unsigned char out[16];
|
|
unsigned char newmunge;
|
|
signed long lenread;
|
|
int s = 0;
|
|
unsigned char * pChecksums, * ppChecksums;
|
|
unsigned char ck;
|
|
|
|
infile = openinfile(infile_name);
|
|
outfile = openoutfile(outfile_name);
|
|
|
|
lenread = fread( headerdata, 1, 512, infile );
|
|
if( lenread != 512 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid decoded "
|
|
"iHP firmware - reason: header length\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
if( modify )
|
|
{
|
|
modifyheader( headerdata ); /* reversible */
|
|
};
|
|
|
|
i = testheader( headerdata );
|
|
if( i == -1 )
|
|
{
|
|
fprintf( stderr, "This firmware is for an unknown model, or is not"
|
|
" a valid decoded iHP firmware\n" );
|
|
exit( -1 );
|
|
};
|
|
fprintf( stderr, "Model %s\n", models[ i ] );
|
|
|
|
dwLength1 = headerdata[0] | (headerdata[1]<<8) |
|
|
(headerdata[2]<<16) | (headerdata[3]<<24);
|
|
dwLength2 = headerdata[4] | (headerdata[5]<<8) |
|
|
(headerdata[6]<<16) | (headerdata[7]<<24);
|
|
dwLength3 = headerdata[8] | (headerdata[9]<<8) |
|
|
(headerdata[10]<<16) | (headerdata[11]<<24);
|
|
|
|
if( dwLength1 < firmware_minsize[i] ||
|
|
dwLength1 > firmware_maxsize[i] ||
|
|
dwLength2 < firmware_minsize[i] ||
|
|
dwLength2 > dwLength1 ||
|
|
dwLength3 > dwLength1 ||
|
|
dwLength2+dwLength3+512 != dwLength1 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid decoded iHP"
|
|
" firmware - reason: file 'length' data\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
pChecksums = ppChecksums = (unsigned char *)( malloc( dwLength3 ) );
|
|
|
|
fwrite( headerdata, 512, 1, outfile );
|
|
|
|
memset( blockdata, 0, 16 );
|
|
ck = 0;
|
|
while( ( fp < dwLength2 ) &&
|
|
( lenread = fread( blockdata+16, 1, 16, infile ) ) == 16 )
|
|
{
|
|
fp += 16;
|
|
for( i=0; i<16; ++i )
|
|
{
|
|
newmunge = blockdata[16+((12+i)&0xf)] ^ blockdata[i];
|
|
out[i] = newmunge ^ munge[i];
|
|
ck += blockdata[16+i];
|
|
blockdata[i] = newmunge;
|
|
};
|
|
fwrite( out, 1, 16, outfile );
|
|
|
|
if( s == 496 )
|
|
{
|
|
s = 0;
|
|
memset( blockdata, 0, 16 );
|
|
*ppChecksums++ = ck;
|
|
ck = 0;
|
|
}
|
|
else
|
|
s+=16;
|
|
};
|
|
|
|
if( fp != dwLength2 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid decoded "
|
|
"iHP firmware - reason: 'length1' mismatch\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
/* write out remainder w/out applying descrambler */
|
|
fp = 0;
|
|
lenread = dwLength3;
|
|
ppChecksums = pChecksums;
|
|
while( ( fp < dwLength3) &&
|
|
( lenread = fwrite( ppChecksums, 1, lenread, outfile ) ) > 0 )
|
|
{
|
|
fp += lenread;
|
|
ppChecksums += lenread;
|
|
lenread = dwLength3 - fp;
|
|
};
|
|
|
|
if( fp != dwLength3 )
|
|
{
|
|
fprintf( stderr, "This doesn't look like a valid decoded "
|
|
"iHP firmware - reason: 'length2' mismatch\n" );
|
|
exit( -1 );
|
|
};
|
|
|
|
fprintf( stderr, "File encoded successfully and checksum table built!\n" );
|
|
|
|
return 0;
|
|
}
|