♪ Midi Password Generator ♪

The script uses a key derivation function to extract a cryptographic key from an array of MIDI notes, fetched in real-time.

Dependencies

The script uses the python-rtmidi library that requires (on Linux) the following libraries

build-essential
libasound2-dev (For ALSA support)
libjack-jackd2-dev (For Jack support)

To install them execute

sudo apt-get install build-essential
sudo apt-get install libasound2-dev #Just for ALSA
sudo apt-get install libjack-jackd2-dev #Just for Jack

After that you need to install the following python dependencies

sudo pip install hashlib progress argparse python-rtmidi

Tested only on Ubuntu 18.04, for other OS support read the rtmidi installation page

Usage

Batch parameter

usage: main.py [-h] [-p PORT] [-m MIN_NOTE] [-s SALT] [-f FUNC] [-r ROUND]

Generate password through MIDI

optional arguments:
  -h, --help            show this help message and exit
  -p PORT, --port PORT  Midi port
  -m MIN_NOTE, --min-note MIN_NOTE
                        Minimun notes to play
  -s SALT, --salt SALT  Salt used in the key derivation function
  -f FUNC, --func FUNC  Key derivation function. Possible values : "pbkdf2",
                        "scrypt"
  -r ROUND, --round ROUND
                        Round to use in the key derivation function (Only in
                        pbkdf2 mode)

In case no argument is passed, the script asks for input interactively.

How does it work

The script simply fetches MIDI events in real time, and store every note ("note on" event in particular) in a buffer, that in the end is passed through the PBKDF2 key derivation function along with a used defined salt.

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