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MyWeb/WXBizDataCrypt.py

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