Basic reading of updates, todo validate checksum and read everything for real and put everything in normal types

read_microcode_update.py

# Author : Matan M. Mates
# Purpose: Parse an inc file and print some info about it

import sys
import struct

ARGC = 2

unpack_struct = ">IIBBBBIIIIII12s"

def clean_date(day,month,year1,year2):
	return hex(day)[2:] + '.' + hex(month)[2:] + '.' + hex(year1)[2:] + hex(year2)[2:]

def parse_datafile(file_data):
	data = {}
	header_version, update_revision, \
	month, day, year1,year2, cpuid, checksum, proc_flags, reserved, \
	data_size, total_size, reserved2 = struct.unpack(unpack_struct, file_data[:48])
	data.update({"Update Date": clean_date(day,month,year1,year2)})
	data.update({"Header Version": str(header_version)})
	data.update({"Update Revision": str(update_revision)})
	data.update({"Data Size": str(data_size)})
	data.update({"Total Size": str(total_size)})
	data.update({"CPUID": hex(cpuid)})
	data.update({"Checksum": hex(checksum)})
	return data

def main():
	script_name, target_file = sys.argv
	file_data = open(target_file,'rb').read()
	fields = parse_datafile(file_data)
	print '\n\n' + '-' * 60 + '\n'
	for k in fields:
		print k + " - " + fields[k]
	print '\n' + '-' * 60

if __name__ == '__main__':
	if len(sys.argv) != ARGC:
		print "Usage: {script} <Target File>".format(script=sys.argv[0])
		sys.exit(1)
	main()
	sys.exit(0)