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35 lines
867 B
Python
35 lines
867 B
Python
import base64
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import hashlib
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from Crypto.Cipher import AES
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from nonebot.utils import logger_wrapper
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log = logger_wrapper("FEISHU")
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class AESCipher(object):
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def __init__(self, key):
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self.block_size = AES.block_size
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self.key = hashlib.sha256(AESCipher.str_to_bytes(key)).digest()
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@staticmethod
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def str_to_bytes(data):
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u_type = type(b"".decode('utf8'))
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if isinstance(data, u_type):
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return data.encode('utf8')
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return data
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@staticmethod
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def _unpad(s):
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return s[:-ord(s[len(s) - 1:])]
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def decrypt(self, enc):
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iv = enc[:AES.block_size]
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cipher = AES.new(self.key, AES.MODE_CBC, iv)
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return self._unpad(cipher.decrypt(enc[AES.block_size:]))
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def decrypt_string(self, enc):
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enc = base64.b64decode(enc)
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return self.decrypt(enc).decode('utf8')
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