async def _enable_encryption(self):
# Encryption can be enabled whenever credentials are available but only
# after DEVICE_INFORMATION has been sent
if self.service.credentials:
# Verify credentials and generate keys
credentials = HapCredentials.parse(self.service.credentials)
pair_verifier = MrpPairingVerifier(self, self.srp, credentials)
try:
await pair_verifier.verify_credentials()
output_key, input_key = pair_verifier.encryption_keys()
self.connection.enable_encryption(output_key, input_key)
except Exception as ex:
raise exceptions.AuthenticationError(str(ex)) from ex
async def _connect_and_encrypt(self):
if not self.connection.connected:
await self.start()
# Encryption can be enabled whenever credentials are available but only
# after DEVICE_INFORMATION has been sent
if self.service.credentials and self._initial_message_sent:
self._initial_message_sent = False
# Verify credentials and generate keys
credentials = Credentials.parse(self.service.credentials)
pair_verifier = MrpPairingVerifier(self, self.srp, credentials)
await pair_verifier.verify_credentials()
output_key, input_key = pair_verifier.encryption_keys()
self.connection.enable_encryption(output_key, input_key)
async def finish(self):
"""Stop pairing process."""
if not self.pin_code:
raise exceptions.PairingError("no pin given")
credentials = str(await error_handler(
self.pairing_procedure.finish_pairing,
exceptions.PairingError,
self.pin_code,
))
_LOGGER.debug("Verifying credentials %s", credentials)
verifier = MrpPairingVerifier(self.protocol, self.srp,
Credentials.parse(credentials))
await error_handler(verifier.verify_credentials,
exceptions.PairingError)
self.service.credentials = credentials
self._has_paired = True