mirror of
https://github.com/home-assistant/core
synced 2024-08-28 03:36:46 +02:00
79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
"""Support for One-Time Password (OTP)."""
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from __future__ import annotations
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import time
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import pyotp
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import voluptuous as vol
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from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
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from homeassistant.const import CONF_NAME, CONF_TOKEN
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from homeassistant.core import HomeAssistant, callback
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.entity_platform import AddEntitiesCallback
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from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
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DEFAULT_NAME = "OTP Sensor"
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TIME_STEP = 30 # Default time step assumed by Google Authenticator
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
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{
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vol.Required(CONF_TOKEN): cv.string,
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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}
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)
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async def async_setup_platform(
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hass: HomeAssistant,
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config: ConfigType,
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async_add_entities: AddEntitiesCallback,
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discovery_info: DiscoveryInfoType | None = None,
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) -> None:
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"""Set up the OTP sensor."""
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name = config.get(CONF_NAME)
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token = config.get(CONF_TOKEN)
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async_add_entities([TOTPSensor(name, token)], True)
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# Only TOTP supported at the moment, HOTP might be added later
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class TOTPSensor(SensorEntity):
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"""Representation of a TOTP sensor."""
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_attr_icon = "mdi:update"
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_attr_should_poll = False
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def __init__(self, name, token):
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"""Initialize the sensor."""
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self._name = name
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self._otp = pyotp.TOTP(token)
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self._state = None
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self._next_expiration = None
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async def async_added_to_hass(self) -> None:
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"""Handle when an entity is about to be added to Home Assistant."""
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self._call_loop()
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@callback
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def _call_loop(self):
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self._state = self._otp.now()
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self.async_write_ha_state()
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# Update must occur at even TIME_STEP, e.g. 12:00:00, 12:00:30,
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# 12:01:00, etc. in order to have synced time (see RFC6238)
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self._next_expiration = TIME_STEP - (time.time() % TIME_STEP)
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self.hass.loop.call_later(self._next_expiration, self._call_loop)
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@property
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def name(self):
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"""Return the name of the sensor."""
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return self._name
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@property
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def native_value(self):
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"""Return the state of the sensor."""
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return self._state
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