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Generic Usage

This document is for generic non-flipper usage of the mfkey32v2 tool.

Requirements

  1. GCC for compiling C (deb)
  2. make for utilising the makefile.
  3. git for cloning the repo

GCC and Makefile sudo apt install build-essential

git - github CLI sudo apt-get install git

For compilation and use on windows you will need to use MingW or alternate virtual debian environment. link to mingW install instructions

Compilation

  1. Download code
  • git clone https://github.com/equipter/mfkey32v2
  1. Navigate into repo directory
  • cd mfkey32v2/
  1. Compile mfkey32v2
  • make mfkey32v2

Compiling On Windows

If mingw32-make fails with the error make (e=2): The system cannot find the file specified.

try: mingw32-make CC=gcc

Standalone Usage

The command syntax for mfkey32v2 is:

./mfkey32v2 <uid> <nt> <nr_0> <ar_0> <nt1> <nr_1> <ar_1>

Example Mfkey32v2 Usage

input:

./mfkey32v2 2a234f80 240bd022 ad2e1687 57e6f7e4 18a4bd3e accc1a23 6f10e401

output:

MfKey32v2 open source Mifare Classic key-recovery tool
Cracks keys by two 32bit keystream authenticationsRecovering key for:
    uid: 2a234f80
   nt_0: 240bd022
 {nr_0}: ad2e1687
 {ar_0}: 57e6f7e4
   nt_1: 18a4bd3e
 {nr_1}: accc1a23
 {ar_1}: 6f10e401

LFSR successors of the tag challenge:
  nt': fdef821e
 nt'': 066a97e6

Keystream used to generate {ar} and {at}:
  ks2: aa0975fa

Found Key: [a0a1a2a3a4a5]

After Key Calculation

Once your keys have been outut by Mfkey you can now use that key and attempt authentication on the sector described by your collection method