27 lines
917 B
Python
27 lines
917 B
Python
from base64 import b64decode
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from Crypto.Cipher import AES
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import json
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class WXBizDataCrypt:
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def __init__(self, appid, session_key):
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self.appid = appid
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self.session_key = b64decode(session_key)
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def decrypt(self, encrypted_data, iv):
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# AES解密
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try:
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cipher = AES.new(self.session_key, AES.MODE_CBC, b64decode(iv))
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decrypted = json.loads(self._unpad(cipher.decrypt(b64decode(encrypted_data))))
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if decrypted['watermark']['appid'] != self.appid:
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raise Exception('Invalid Buffer')
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return decrypted
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except Exception as e:
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raise Exception('Failed to decrypt data')
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def _unpad(self, s):
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try:
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return s[:-ord(s[len(s) - 1:])]
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except Exception as e:
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print("Error during unpadding:", e)
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return s # 返回原始数据以便进一步分析错误
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