Continue seeded Qinglong script collection

脚本库/微信小程序/抓包版/wechatBizDataCrypt/2025-08-27_wechatBizDataCrypt_14df20b3.py

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+# Source: https://github.com/LinYuanovo/AutoTaskScripts/blob/main/utils/wechatBizDataCrypt.py
+# Raw: https://raw.githubusercontent.com/LinYuanovo/AutoTaskScripts/main/utils/wechatBizDataCrypt.py
+# Repo: LinYuanovo/AutoTaskScripts
+# Path: utils/wechatBizDataCrypt.py
+# UploadedAt: 2025-08-27T15:31:08+08:00
+# SHA256: 14df20b339b260903ed95ec4bb58e176b83e3f4c865264cc21ac971dd654a766
+# Category: 微信小程序/抓包版
+# Evidence: appid/openid/session_key/encryptedData等小程序字段
+
+import base64
+import json
+from Crypto.Cipher import AES
+from Crypto.Random import get_random_bytes
+
+class WXBizDataCryptUtil:
+    """
+    微信小程序加解密工具
+    """
+    def __init__(self, sessionKey):
+        self.sessionKey = sessionKey
+
+    def encrypt(self, data, iv=None):
+        """
+        data: dict或str，若为dict自动转为json字符串
+        iv: base64字符串，若为None自动生成
+        返回: (加密数据base64, iv base64)
+        """
+        if isinstance(data, dict):
+            data = json.dumps(data, separators=(',', ':'))
+        if iv is None:
+            iv_bytes = get_random_bytes(16)
+            iv = base64.b64encode(iv_bytes).decode('utf-8')
+        else:
+            iv_bytes = base64.b64decode(iv)
+        sessionKey = base64.b64decode(self.sessionKey)
+        cipher = AES.new(sessionKey, AES.MODE_CBC, iv_bytes)
+        padded = self._pad(data.encode('utf-8'))
+        encrypted = cipher.encrypt(padded)
+        encrypted_b64 = base64.b64encode(encrypted).decode('utf-8')
+        return encrypted_b64, iv
+
+    def decrypt(self, encryptedData, iv):
+        """
+        encryptedData: base64字符串
+        iv: base64字符串
+        返回: dict或str
+        """
+        sessionKey = base64.b64decode(self.sessionKey)
+        encryptedData = base64.b64decode(encryptedData)
+        iv = base64.b64decode(iv)
+        cipher = AES.new(sessionKey, AES.MODE_CBC, iv)
+        decrypted = self._unpad(cipher.decrypt(encryptedData))
+        try:
+            return json.loads(decrypted)
+        except Exception:
+            return decrypted.decode('utf-8')
+
+    def _pad(self, s):
+        pad_len = 16 - len(s) % 16
+        return s + bytes([pad_len] * pad_len)
+
+    def _unpad(self, s):
+        return s[:-s[-1]]