29 lines
730 B
Python
29 lines
730 B
Python
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import base64
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import hashlib
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import json
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import logging
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logger = logging.getLogger(__name__)
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def decrypt_jd_message(encrypted_body: str, app_secret: str) -> dict | None:
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try:
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key = hashlib.md5(app_secret.encode("utf-8")).hexdigest()[:16].encode("utf-8")
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raw = base64.b64decode(encrypted_body)
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iv = raw[:16]
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ciphertext = raw[16:]
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from Crypto.Cipher import AES
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cipher = AES.new(key, AES.MODE_CBC, iv)
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decrypted = cipher.decrypt(ciphertext)
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pad_len = decrypted[-1]
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decrypted = decrypted[:-pad_len]
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return json.loads(decrypted.decode("utf-8"))
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except Exception:
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logger.warning("JD message AES decrypt failed")
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return None
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