Incompatible with cryptography 43.0.x module

[pgarasz]

Hi,

I've run into an issue with requests-ntlm 1.3.0 after upgrading libraries in a Python 3.11 env.

It seems the issue was caused by cryptography module upgraded to 43.0.1.
It was working fine on 42.0.5 and downgrading helped.

Here's part of Traceback:

  File "C:\envs\my-env\Lib\site-packages\requests\hooks.py", line 30, in dispatch_hook
    _hook_data = hook(hook_data, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\requests_ntlm\requests_ntlm.py", line 200, in response_hook
    return self.retry_using_http_NTLM_auth(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\requests_ntlm\requests_ntlm.py", line 178, in retry_using_http_NTLM_auth
    authenticate_message = base64.b64encode(client.step(val) or b"").decode()
                                            ^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\spnego\_ntlm.py", line 384, in step
    out_token = getattr(self, "_step_%s" % self.usage)(
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\spnego\_ntlm.py", line 457, in _step_initiate
    auth_kwargs["encrypted_session_key"] = rc4k(key_exchange_key, self._session_key)
                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\spnego\_ntlm_raw\crypto.py", line 426, in rc4k
    return rc4init(k).update(d)
           ^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\spnego\_ntlm_raw\crypto.py", line 431, in rc4init
    return RC4Handle(k)
           ^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\spnego\_ntlm_raw\crypto.py", line 56, in __init__
    self._handle = cipher.encryptor()
                   ^^^^^^^^^^^^^^^^^^
  File "C:\envs\my-env\Lib\site-packages\cryptography\hazmat\primitives\ciphers\base.py", line 113, in encryptor
    return rust_openssl.ciphers.create_encryption_ctx(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cryptography.exceptions.UnsupportedAlgorithm: cipher RC4 in None mode is not supported

[jborean93]

What version of pyspnego are you using? 43.0.1 was released in in October 2024 and included a change around where the RC4 ciphers were imported from but that's been fixed in pyspnego close to when cryptography made their change https://github.com/jborean93/pyspnego/blob/main/CHANGELOG.md#0111---2024-07-24.