Pergola Fabio pergolafabio

Cloning a 7-byte UID MFC (Mifare Classic) 1k card and more

This is a little blog about my trials of figuring out how to clone a 7-byte 1k MFC card and more I discovered. I'm not an expert, this is just what I found out. I'm writing it down because I couldn't find a single place where this info was grouped together.

A little while ago I bought a Flipper Zero because I was interested in the world of NFC/RFID tags and I wanted to figure out a way to clone my NFC card used to open the underground waste container in my neighbourhood.

Findings

It turns out most of my NFC cards used for various services are so called MIFARE Classic (MFC) 1K cards. These appear to be the most common card used for semi-secure things. The tag used to enter my office is a MIFARE DESfire card, which as far as I know, isn't clonable unless you have the decryption keys.
- There is also a MIFARE Classic 4K version which can store more data. I haven't encountered this one yet so nothing I can tell you about it.
The MFC Classic

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Dobiss Domotica / Home Automation Protocols

This is information related to the Dobiss protocols that I have discovered by probing various things on my devices. My installation is a pair of modules marked "Dobiss Domotics Relay Module single pole 8 channel Model DO4511" connected by a black CAN cable. The button bus is connected to the first module.

WARNING Assume that anything you can touch or probe or poke a wire into is on LIVE VOLTAGE and will kill you if you touch it. I'm not responsible for whatever you decide to do with this information.

In particular make sure of the following: Measure that there is no voltage between the ground and your earch connection.

	import socket
	import time
	from datetime import datetime
	import paho.mqtt.client as mqtt_client

	# Door station configurations
	DOOR_STATIONS = {
	"10.10.2.28": {
	"name": "Haupteingang",
	"topic": "frigate/Haupteingang/klingeln/state"

	import requests
	import hashlib
	import time
	import uuid
	import os
	import copy
	import json

	# This is based on my personal implementation but stripped down to only what is
	# needed to verify it.

	import requests
	import hashlib
	import time
	import uuid
	import os
	import copy
	import json

	# Fixed up version of my previous code to work with the Cloud endpoints.
	# Hopefully this works.

	# -- coding: utf-8 --
	import sys
	import socket
	import requests
	import re
	import random
	import hashlib
	import threading
	import time
	import logging