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36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
import base64
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import hashlib
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import hmac
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from typing import TYPE_CHECKING
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from nonebot.utils import logger_wrapper
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if TYPE_CHECKING:
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from nonebot.drivers import BaseDriver
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log = logger_wrapper("DING")
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def check_legal(timestamp, remote_sign, driver: "BaseDriver"):
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"""
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1. timestamp 与系统当前时间戳如果相差1小时以上，则认为是非法的请求。
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2. sign 与开发者自己计算的结果不一致，则认为是非法的请求。
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必须当timestamp和sign同时验证通过，才能认为是来自钉钉的合法请求。
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"""
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# 目前先设置成 secret
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# TODO 后面可能可以从 secret[adapter_name] 获取
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app_secret = driver.config.secret # 机器人的 appSecret
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if not app_secret:
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# TODO warning
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log("WARNING", "No ding secrets set, won't check sign")
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return True
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app_secret_enc = app_secret.encode('utf-8')
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string_to_sign = '{}\n{}'.format(timestamp, app_secret)
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string_to_sign_enc = string_to_sign.encode('utf-8')
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hmac_code = hmac.new(app_secret_enc,
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string_to_sign_enc,
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digestmod=hashlib.sha256).digest()
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sign = base64.b64encode(hmac_code).decode('utf-8')
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return remote_sign == sign
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