Use credentials_hash for smartcamera rtsp url (#1293)

kasa/smartcamera/modules/camera.py

@@ -2,13 +2,18 @@
 
 from __future__ import annotations
 
+import base64
+import logging
 from urllib.parse import quote_plus
 
 from ...credentials import Credentials
 from ...device_type import DeviceType
 from ...feature import Feature
+from ...json import loads as json_loads
 from ..smartcameramodule import SmartCameraModule
 
+_LOGGER = logging.getLogger(__name__)
+
 LOCAL_STREAMING_PORT = 554
 
 
@@ -38,6 +43,27 @@ class Camera(SmartCameraModule):
         """Return the device id."""
         return self.data["lens_mask_info"]["enabled"] == "off"
 
+    def _get_credentials(self) -> Credentials | None:
+        """Get credentials from ."""
+        config = self._device.config
+        if credentials := config.credentials:
+            return credentials
+
+        if credentials_hash := config.credentials_hash:
+            try:
+                decoded = json_loads(
+                    base64.b64decode(credentials_hash.encode()).decode()
+                )
+            except Exception:
+                _LOGGER.warning(
+                    "Unable to deserialize credentials_hash: %s", credentials_hash
+                )
+                return None
+            if (username := decoded.get("un")) and (password := decoded.get("pwd")):
+                return Credentials(username, password)
+
+        return None
+
     def stream_rtsp_url(self, credentials: Credentials | None = None) -> str | None:
         """Return the local rtsp streaming url.
 
@@ -51,7 +77,8 @@ class Camera(SmartCameraModule):
             return None
         dev = self._device
         if not credentials:
-            credentials = dev.credentials
+            credentials = self._get_credentials()
+
         if not credentials or not credentials.username or not credentials.password:
             return None
         username = quote_plus(credentials.username)