python: cookies 解密問題

最近python腳本cookie解密出現問題，報錯
pywintypes.error: (87, 'CryptProtectData', '參數錯誤。') 也有13 也有87
最近一直很忙，沒有時間查找原因，從字節碼上可以看到能夠正常解密的cookie是沒有v10前綴的，查找cookie加解密方式，發現在chrome 80+版本以後對 cookie加密方式進行了調整，網上的所有cookie加解密的方法目前都失效，還好目前已經有很多人提供了最新的解密方法，
如果對原理等有興趣的話，可以參考

這裏進行簡單的調整，方便新老cookie的加解密，簡單增加一下v10的判斷。

import os
import json
import base64
import sqlite3
from win32crypt import CryptUnprotectData
from cryptography.hazmat.primitives.ciphers.aead import AESGCM


def get_string(local_state):
    with open(local_state, 'r', encoding='utf-8') as f:
        s = json.load(f)['os_crypt']['encrypted_key']
    return s


def pull_the_key(base64_encrypted_key):
    encrypted_key_with_header = base64.b64decode(base64_encrypted_key)
    encrypted_key = encrypted_key_with_header[5:]
    key = CryptUnprotectData(encrypted_key, None, None, None, 0)[1]
    return key


def decrypt_string(key, data):
    nonce, cipherbytes = data[3:15], data[15:]
    aesgcm = AESGCM(key)
    plainbytes = aesgcm.decrypt(nonce, cipherbytes, None)
    plaintext = plainbytes.decode('utf-8')
    return plaintext


def get_cookie_from_chrome(host: '.oschina.net'):
    local_state = os.environ['LOCALAPPDATA'] + r'\Google\Chrome\User Data\Local State'
    cookie_path = os.environ['LOCALAPPDATA'] + r"\Google\Chrome\User Data\Default\Cookies"
    
    sql = "select host_key,name,encrypted_value from cookies where host_key='%s'" % host

    with sqlite3.connect(cookie_path) as conn:
        cu = conn.cursor()
        res = cu.execute(sql).fetchall()
        cu.close()
        cookies = {}
        key = pull_the_key(get_string(local_state))
        for host_key, name, encrypted_value in res:
            if encrypted_value[0:3] == b'v10':
                cookies[name] = decrypt_string(key, encrypted_value)
            else:
                cookies[name] = CryptUnprotectData(encrypted_value)[1].decode()

        # print(cookies)
        return cookies