iframe-proxy | Sunbelt Computer Software

25 lines (22 loc) · 905 Bytes

from __future__ import annotations

import random

import secrets

CONFUSE_CHARS = 'OoIl01'

def make_rng(seed: int | None=None) -> tuple[random.Random, int]:

if seed is None:

seed = secrets.randbits(63)

return (random.Random(seed), seed)

def gen_name(rng: random.Random, length: int | None=None, used: set[str] | None=None) -> str:

if length is None:

length = rng.randint(12, 20)

used = used or set()

for _ in range(64):

name = '_' + ''.join((rng.choice(CONFUSE_CHARS) for _ in range(length)))

if name not in used:

return name

while True:

name = '_' + ''.join((rng.choice(CONFUSE_CHARS) for _ in range(length + rng.randint(1, 4))))

if name not in used:

return name

def gen_bytes(rng: random.Random, length: int) -> bytes:

return bytes((rng.randrange(256) for _ in range(length)))

Sunbelt Computer Software