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Fujifillm
#! python2
#-------------------------------------------------------------------------------
# Name: dump_hdr.py
# Purpose: dump header of a FujiFilm FinePix firmware update
# see https://reverseengineering.stackexchange.com/questions/22549/identifying-rom-segment-in-unknown-firmware-update-file
# Author: Igor Skochinsky
#
# Created: 16-11-2019
# Copyright: (c) Igor Skochinsky 2019
# Licence: MIT
#-------------------------------------------------------------------------------
import sys
import struct
f = open("FPUPDATE.DAT", "rb")
tup = struct.unpack("<IHBxII", f.read(0x10))
#print tup
sig, unk4, nb,plfm, unkC = tup
if sig != 0x52494852: #"RIHR"
print("bad header!")
sys.exit(1)
print "unk4: %08X" % unk4
print "blocks: %d" % nb
print "platform: %08X" % plfm
print "unkC: %08X" % unkC
for i in range(nb):
typ, blkoff, blksize, unk8, cksum = struct.unpack("<HxxHHII", f.read(0x10))
print "block %d type: %d" % (i,typ)
print " offset: %x (%x)" % (blkoff, blkoff<<9)
print " size: %x (%x)" % (blksize, blksize<<9)
print " unk8: %08X" % unk8
print " checksum: %08X" % cksum
unk4: 00001001
blocks: 7
platform: 00050600
unkC: 01A40001
block 0 type: 1
offset: 1 (200)
size: 14dc (29b800)
unk8: 00048000
checksum: A1AA045A
block 1 type: 1
offset: 14dd (29ba00)
size: 731 (e6200)
unk8: 002E8000
checksum: 917C608A
block 2 type: 0
offset: 1c0e (381c00)
size: 54c (a9800)
unk8: 00430000
checksum: EA1137CD
block 3 type: 1
offset: 215a (42b400)
size: 21 (4200)
unk8: 004DA000
checksum: 8AE264F9
block 4 type: 0
offset: 217b (42f600)
size: 2a6 (54c00)
unk8: 004DA000
checksum: 8606D33F
block 5 type: 0
offset: 2422 (484400)
size: 34 (6800)
unk8: 004DA000
checksum: 802A3C3B
block 6 type: 2
offset: b420 (1684000)
size: 4 (800)
unk8: 00000000
checksum: 00000000
@petabyt
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petabyt commented Jul 22, 2021

Hey, I'm also working on a Fujifilm firmware decoder: https://github.com/petabyt/fujifilm-firmware
What model did you test this on?

@skochinsky
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skochinsky commented Jul 22, 2021

Hey, I'm also working on a Fujifilm firmware decoder: https://github.com/petabyt/fujifilm-firmware
What model did you test this on?

If you follow the link, you'll see it mentions FinePix S1800.

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