from passlib.hash import sha512_crypt
import random
import string
import time

username = "test"
password = "test"

# 生成16位随机salt
salt = ''.join(
    random.choices(
        string.ascii_letters + string.digits,
        k=16
    )
)

# salt = 'uu2JGUu15xlX4eWn'

# Ubuntu SHA512 shadow格式
hashed = sha512_crypt.hash(
    password,
    salt=salt,
    rounds=5000
)

# Linux shadow日期
days = int(time.time() / 86400)

# 拼接shadow内容
shadow = f"{username}:{hashed}:{days}:0:99999:7:::"

print(shadow)