89 lines
2.4 KiB
Python
89 lines
2.4 KiB
Python
"""
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Support for One-Time Password (OTP).
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/sensor.otp/
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"""
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import time
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import logging
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import voluptuous as vol
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from homeassistant.core import callback
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import homeassistant.helpers.config_validation as cv
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from homeassistant.components.sensor import PLATFORM_SCHEMA
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from homeassistant.const import (CONF_NAME, CONF_TOKEN)
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from homeassistant.helpers.entity import Entity
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REQUIREMENTS = ['pyotp==2.2.6']
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_LOGGER = logging.getLogger(__name__)
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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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ICON = 'mdi:update'
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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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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async def async_setup_platform(hass, config, async_add_entities,
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discovery_info=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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return True
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# Only TOTP supported at the moment, HOTP might be added later
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class TOTPSensor(Entity):
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"""Representation of a TOTP sensor."""
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def __init__(self, name, token):
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"""Initialize the sensor."""
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import pyotp
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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):
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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_schedule_update_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 state(self):
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"""Return the state of the sensor."""
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return self._state
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@property
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def should_poll(self):
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"""No polling needed."""
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return False
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@property
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def icon(self):
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"""Return the icon to use in the frontend."""
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return ICON
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