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jaames/mii-qr.py

Created July 24, 2018 21:02
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Decrypt Mii QR code data from 3DS / Wii U / Miitomo
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mii-qr.py
# Decrypt Mii QR codes from 3DS / Wii U / Miitomo
# Usage: python3 <input file> <output file>
# QR docs: https://www.3dbrew.org/wiki/Mii_Maker
from Crypto.Cipher import AES
from sys import argv
key = bytes([0x59, 0xFC, 0x81, 0x7E, 0x64, 0x46, 0xEA, 0x61, 0x90, 0x34, 0x7B, 0x20, 0xE9, 0xBD, 0xCE, 0x52])
with open(argv[1], "rb") as infile, open(argv[2], "wb") as outfile:
nonce = infile.read(8)
cipher = AES.new(key, AES.MODE_CCM, nonce + bytes([0, 0, 0, 0]))
content = cipher.decrypt(infile.read(0x58))
result = content[:12] + nonce + content[12:]
outfile.write(result)
@KniteRite

KniteRite commented Feb 23, 2025

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(Likely Error) Crypto.Cipher is outdated, replaced with Cryptodome.Cipher

@jaames

jaames commented Feb 23, 2025 •
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@KniteRite-Studios Feel free to make a fork :) This gist is 7 years old and unfortunately I'm not interested in maintaining it any more, sorry!

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