Core: Homekit Controller: Future exception was never retrieved

[ranunculales]

Home Assistant release with the issue: 0.87.1

Last working Home Assistant release (if known): 0.85.1

Operating environment (Hass.io/Docker/Windows/etc.): RPI3B+ Hass.io

Component/platform: HomeKIt

Description of problem: Upon upgrade, (almost) all of my HomeKit devices have disappeared from HA. Current status of devices functionality (brand/status):

• Leviton Smart Decora: Not Working
• Lifx Bulbs: Not Working
• MyQ: Working

In 0.87.0, My Lifx bulbs worked, but not my Leviton switches. Since upgrading to 0.87.1, I have attempted many of the troubleshooting steps listed in the HomeKit page with no success.

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

discovery:
  enable:
    - homekit

homekit:

Traceback (if applicable):

Error doing job: Future exception was never retrieved

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/homekit_controller/__init__.py", line 367, in discovery_dispatch
    device = HKDevice(hass, host, port, model, hkid, config_num, config)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/homekit_controller/__init__.py", line 98, in __init__
    self.accessory_setup()
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/homekit_controller/__init__.py", line 112, in accessory_setup
    data = self.pairing.list_accessories_and_characteristics()
  File "/usr/local/lib/python3.6/site-packages/homekit/controller.py", line 272, in list_accessories_and_characteristics
    self.session = Session(self.pairing_data)
  File "/usr/local/lib/python3.6/site-packages/homekit/controller.py", line 604, in __init__
    c2a_key, a2c_key = get_session_keys(conn, pairing_data)
  File "/usr/local/lib/python3.6/site-packages/homekit/protocol/__init__.py", line 247, in get_session_keys
    ios_key = x25519.X25519PrivateKey.generate()
  File "/usr/local/lib/python3.6/site-packages/cryptography/hazmat/primitives/asymmetric/x25519.py", line 39, in generate
    _Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM
cryptography.exceptions.UnsupportedAlgorithm: X25519 is not supported by this version of OpenSSL.

Additional information:

[Jc2k]

This is a duplicate of #20840. I'm looking into manageable workarounds but ultimately stuck waiting for HASS.io team (https://github.com/home-assistant/hassio/issues/903).

[Jc2k]

Good news, hopefully this means it is fixed very soon: https://github.com/home-assistant/hassio-base/pull/7

[ranunculales]

@Jc2k; you rock man. Thanks for jumping on these so quick.

[niemyjski]

Awesome, is there an eta for the next release with these changes?

[Jc2k]

I’m not sure what the HASS.io release process is. This is quite a large change so I’m not sure if it will be in the next point release.

[Jc2k]

The UnsupportedAlgorithm exception should be gone for HASS.io users now 0.88.0 is out - AIUI HASS.io has moved to Alpine 3.9. See 903 and 914, so this issue should now be resolved.

🎉

[Jc2k]

The last couple of HASS.io releases have had the fix for this, so I think we can close this ticket now.