Decryption: Server Error 500

[ayaangrover]

When I try to decrypt the json file, i get this: Here's what shows up in my powershell:

PS C:\Users\ayaan\Documents\findMyFlipper\FindMyFlipper\AirTagGeneration> python .\web_service.py
pyprovision is not installed, querying http://localhost:6969 for an anisette server
ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\uvicorn\protocols\http\h11_impl.py", line 408, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\uvicorn\middleware\proxy_headers.py", line 84, in __call__
    return await self.app(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\fastapi\applications.py", line 1106, in __call__
    await super().__call__(scope, receive, send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\applications.py", line 122, in __call__
    await self.middleware_stack(scope, receive, send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\middleware\errors.py", line 184, in __call__
    raise exc
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\middleware\errors.py", line 162, in __call__
    await self.app(scope, receive, _send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\middleware\exceptions.py", line 79, in __call__
    raise exc
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\middleware\exceptions.py", line 68, in __call__
    await self.app(scope, receive, sender)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\fastapi\middleware\asyncexitstack.py", line 20, in __call__
    raise e
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\fastapi\middleware\asyncexitstack.py", line 17, in __call__
    await self.app(scope, receive, send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\routing.py", line 718, in __call__
    await route.handle(scope, receive, send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\routing.py", line 276, in handle
    await self.app(scope, receive, send)
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\starlette\routing.py", line 66, in app
    response = await func(request)
               ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\fastapi\routing.py", line 274, in app
    raw_response = await run_endpoint_function(
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\fastapi\routing.py", line 191, in run_endpoint_function
    return await dependant.call(**values)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\Documents\findMyFlipper\FindMyFlipper\AirTagGeneration\web_service.py", line 292, in report_decryption
    clear_text = decrypt_payload(report['payload'], key_dict[hash_key])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\Documents\findMyFlipper\FindMyFlipper\AirTagGeneration\web_service.py", line 126, in decrypt_payload
    eph_key = ec.EllipticCurvePublicKey.from_encoded_point(ec.SECP224R1(), data[5:62])
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\cryptography\hazmat\primitives\asymmetric\ec.py", line 185, in from_encoded_point
    return backend.load_elliptic_curve_public_bytes(curve, data)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ayaan\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0\LocalCache\local-packages\Python312\site-packages\cryptography\hazmat\backends\openssl\backend.py", line 1120, in load_elliptic_curve_public_bytes
    raise ValueError("Invalid public bytes for the given curve")
ValueError: Invalid public bytes for the given curve
PS C:\Users\ayaan\Documents\findMyFlipper\FindMyFlipper\AirTagGeneration>

[Antisdore]

Hey, idk if u have resolved ur issue. I have got the same one and after some researches, I found it was the same issue as the one that happened in the request_reports.py file. Here was the solution : https://github.com/MatthewKuKanich/FindMyFlipper/issues/61#issuecomment-2065003410

The solution for your issue is the same, just search in the file for the similar part and replace it with :

  timestamp = int.from_bytes(data[0:4], byteorder="big") + 978307200
  adj = len(data) - 88
  eph_key = ec.EllipticCurvePublicKey.from_encoded_point(ec.SECP224R1(), data[5+adj:62+adj])
  shared_key = ec.derive_private_key(priv, ec.SECP224R1(), default_backend()).exchange(ec.ECDH(), eph_key)
  symmetric_key = sha256(shared_key + b'\x00\x00\x00\x01' + data[5+adj:62+adj])
  iv = symmetric_key[16:]
  decryption_key = symmetric_key[:16]
  ciper_txt = data[62+adj:72+adj]
  auth_tag = data[72+adj:]