MTK md1image unpacking.

md1img_unpack.py

#!/usr/bin/env python

import os
import struct
import sys

MD1IMG_MAGIC1 = 0x58881688
MD1IMG_MAGIC2 = 0x58891689

def main():
	path = sys.argv[1]
	stat = os.stat(path)
	offset = 0
	size = stat.st_size
	with open(path, "rb") as fp:
		while offset < size:
			fp.seek(offset)
			header = fp.read(80)
			unpacked = struct.unpack('<II32sIIIIIIIIII', header)
			magic1 = unpacked[0]
			magic2 = unpacked[5]
			if magic1 != MD1IMG_MAGIC1 or magic2 != MD1IMG_MAGIC2:
				break
			data_size = unpacked[1]
			name = unpacked[2]
			name = name[:name.find(b"\0")].decode()
			base = unpacked[3]
			mode = unpacked[4]
			data_offset = unpacked[6]
			print("Found {:s}@0x{:x},0x{:x}".format(name, base, data_size))
			offset += data_offset
			fp.seek(offset)
			data = fp.read(data_size)
			with open("{:s}.{:s}.bin".format(path, name), "wb") as out:
				out.write(data)
			offset += data_size
			if offset % 16 != 0:
				offset += 16 - (offset % 16)

if __name__ == "__main__":
	main()