Avoid conversion of timestamps in jwt auth (home-assistant#101856)

homeassistant/auth/__init__.py

@@ -5,14 +5,14 @@
 from collections import OrderedDict
 from collections.abc import Mapping
 from datetime import timedelta
+import time
 from typing import Any, cast
 
 import jwt
 
 from homeassistant import data_entry_flow
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.data_entry_flow import FlowResult
-from homeassistant.util import dt as dt_util
 
 from . import auth_store, jwt_wrapper, models
 from .const import ACCESS_TOKEN_EXPIRATION, GROUP_ID_ADMIN
@@ -505,12 +505,13 @@ def async_create_access_token(
 
         self._store.async_log_refresh_token_usage(refresh_token, remote_ip)
 
-        now = dt_util.utcnow()
+        now = int(time.time())
+        expire_seconds = int(refresh_token.access_token_expiration.total_seconds())
         return jwt.encode(
             {
                 "iss": refresh_token.id,
                 "iat": now,
-                "exp": now + refresh_token.access_token_expiration,
+                "exp": now + expire_seconds,
             },
             refresh_token.jwt_key,
             algorithm="HS256",

tests/auth/test_init.py

@@ -1,5 +1,6 @@
 """Tests for the Home Assistant auth module."""
 from datetime import timedelta
+import time
 from typing import Any
 from unittest.mock import patch
 
@@ -371,11 +372,15 @@ async def test_cannot_retrieve_expired_access_token(hass: HomeAssistant) -> None
     access_token = manager.async_create_access_token(refresh_token)
     assert await manager.async_validate_access_token(access_token) is refresh_token
 
+    # We patch time directly here because we want the access token to be created with
+    # an expired time, but we do not want to freeze time so that jwt will compare it
+    # to the patched time. If we freeze time for the test it will be frozen for jwt
+    # as well and the token will not be expired.
     with patch(
-        "homeassistant.util.dt.utcnow",
-        return_value=dt_util.utcnow()
-        - auth_const.ACCESS_TOKEN_EXPIRATION
-        - timedelta(seconds=11),
+        "homeassistant.auth.time.time",
+        return_value=time.time()
+        - auth_const.ACCESS_TOKEN_EXPIRATION.total_seconds()
+        - 11,
     ):
         access_token = manager.async_create_access_token(refresh_token)