mirror of
https://github.com/python-kasa/python-kasa.git
synced 2024-12-24 20:23:35 +00:00
439 lines
15 KiB
Python
439 lines
15 KiB
Python
import errno
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import json
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import logging
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import secrets
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import struct
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import sys
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import time
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from contextlib import nullcontext as does_not_raise
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import aiohttp
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import pytest
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from ..aestransport import AesTransport
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from ..credentials import Credentials
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from ..deviceconfig import DeviceConfig
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from ..exceptions import (
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AuthenticationException,
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ConnectionException,
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RetryableException,
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SmartDeviceException,
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TimeoutException,
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)
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from ..httpclient import HttpClient
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from ..iotprotocol import IotProtocol
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from ..klaptransport import (
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KlapEncryptionSession,
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KlapTransport,
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KlapTransportV2,
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_sha256,
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)
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from ..protocol import DEFAULT_CREDENTIALS, get_default_credentials
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from ..smartprotocol import SmartProtocol
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DUMMY_QUERY = {"foobar": {"foo": "bar", "bar": "foo"}}
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class _mock_response:
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def __init__(self, status, content: bytes):
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self.status = status
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self.content = content
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async def __aenter__(self):
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return self
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async def __aexit__(self, exc_t, exc_v, exc_tb):
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pass
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async def read(self):
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return self.content
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@pytest.mark.parametrize(
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"error, retry_expectation",
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[
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(Exception("dummy exception"), False),
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(aiohttp.ServerTimeoutError("dummy exception"), True),
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(aiohttp.ClientOSError("dummy exception"), True),
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],
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ids=("Exception", "SmartDeviceException", "ConnectError"),
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)
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@pytest.mark.parametrize("transport_class", [AesTransport, KlapTransport])
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@pytest.mark.parametrize("protocol_class", [IotProtocol, SmartProtocol])
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@pytest.mark.parametrize("retry_count", [1, 3, 5])
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async def test_protocol_retries_via_client_session(
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mocker, retry_count, protocol_class, transport_class, error, retry_expectation
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):
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host = "127.0.0.1"
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conn = mocker.patch.object(aiohttp.ClientSession, "post", side_effect=error)
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config = DeviceConfig(host)
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with pytest.raises(SmartDeviceException):
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await protocol_class(transport=transport_class(config=config)).query(
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DUMMY_QUERY, retry_count=retry_count
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)
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expected_count = retry_count + 1 if retry_expectation else 1
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assert conn.call_count == expected_count
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@pytest.mark.parametrize(
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"error, retry_expectation",
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[
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(SmartDeviceException("dummy exception"), False),
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(RetryableException("dummy exception"), True),
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(TimeoutException("dummy exception"), True),
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],
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ids=("SmartDeviceException", "RetryableException", "TimeoutException"),
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)
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@pytest.mark.parametrize("transport_class", [AesTransport, KlapTransport])
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@pytest.mark.parametrize("protocol_class", [IotProtocol, SmartProtocol])
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@pytest.mark.parametrize("retry_count", [1, 3, 5])
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async def test_protocol_retries_via_httpclient(
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mocker, retry_count, protocol_class, transport_class, error, retry_expectation
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):
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host = "127.0.0.1"
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conn = mocker.patch.object(HttpClient, "post", side_effect=error)
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config = DeviceConfig(host)
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with pytest.raises(SmartDeviceException):
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await protocol_class(transport=transport_class(config=config)).query(
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DUMMY_QUERY, retry_count=retry_count
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)
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expected_count = retry_count + 1 if retry_expectation else 1
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assert conn.call_count == expected_count
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@pytest.mark.parametrize("transport_class", [AesTransport, KlapTransport])
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@pytest.mark.parametrize("protocol_class", [IotProtocol, SmartProtocol])
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async def test_protocol_no_retry_on_connection_error(
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mocker, protocol_class, transport_class
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):
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host = "127.0.0.1"
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conn = mocker.patch.object(
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aiohttp.ClientSession,
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"post",
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side_effect=AuthenticationException("foo"),
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)
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config = DeviceConfig(host)
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with pytest.raises(SmartDeviceException):
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await protocol_class(transport=transport_class(config=config)).query(
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DUMMY_QUERY, retry_count=5
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)
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assert conn.call_count == 1
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@pytest.mark.parametrize("transport_class", [AesTransport, KlapTransport])
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@pytest.mark.parametrize("protocol_class", [IotProtocol, SmartProtocol])
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async def test_protocol_retry_recoverable_error(
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mocker, protocol_class, transport_class
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):
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host = "127.0.0.1"
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conn = mocker.patch.object(
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aiohttp.ClientSession,
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"post",
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side_effect=aiohttp.ClientOSError("foo"),
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)
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config = DeviceConfig(host)
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with pytest.raises(SmartDeviceException):
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await protocol_class(transport=transport_class(config=config)).query(
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DUMMY_QUERY, retry_count=5
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)
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assert conn.call_count == 6
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@pytest.mark.parametrize("transport_class", [AesTransport, KlapTransport])
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@pytest.mark.parametrize("protocol_class", [IotProtocol, SmartProtocol])
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@pytest.mark.parametrize("retry_count", [1, 3, 5])
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async def test_protocol_reconnect(mocker, retry_count, protocol_class, transport_class):
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host = "127.0.0.1"
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remaining = retry_count
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mock_response = {"result": {"great": "success"}, "error_code": 0}
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def _fail_one_less_than_retry_count(*_, **__):
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nonlocal remaining
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remaining -= 1
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if remaining:
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raise ConnectionException("Simulated connection failure")
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return mock_response
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mocker.patch.object(transport_class, "perform_handshake")
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if hasattr(transport_class, "perform_login"):
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mocker.patch.object(transport_class, "perform_login")
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send_mock = mocker.patch.object(
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transport_class,
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"send",
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side_effect=_fail_one_less_than_retry_count,
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)
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config = DeviceConfig(host)
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response = await protocol_class(transport=transport_class(config=config)).query(
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DUMMY_QUERY, retry_count=retry_count
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)
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assert "result" in response or "foobar" in response
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assert send_mock.call_count == retry_count
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@pytest.mark.parametrize("log_level", [logging.WARNING, logging.DEBUG])
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async def test_protocol_logging(mocker, caplog, log_level):
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caplog.set_level(log_level)
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logging.getLogger("kasa").setLevel(log_level)
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def _return_encrypted(*_, **__):
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nonlocal encryption_session
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# Do the encrypt just before returning the value so the incrementing sequence number is correct
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encrypted, seq = encryption_session.encrypt('{"great":"success"}')
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return 200, encrypted
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seed = secrets.token_bytes(16)
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auth_hash = KlapTransport.generate_auth_hash(Credentials("foo", "bar"))
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encryption_session = KlapEncryptionSession(seed, seed, auth_hash)
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config = DeviceConfig("127.0.0.1")
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protocol = IotProtocol(transport=KlapTransport(config=config))
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protocol._transport._handshake_done = True
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protocol._transport._session_expire_at = time.time() + 86400
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protocol._transport._encryption_session = encryption_session
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mocker.patch.object(HttpClient, "post", side_effect=_return_encrypted)
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response = await protocol.query({})
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assert response == {"great": "success"}
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if log_level == logging.DEBUG:
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assert "success" in caplog.text
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else:
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assert "success" not in caplog.text
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def test_encrypt():
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d = json.dumps({"foo": 1, "bar": 2})
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seed = secrets.token_bytes(16)
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auth_hash = KlapTransport.generate_auth_hash(Credentials("foo", "bar"))
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encryption_session = KlapEncryptionSession(seed, seed, auth_hash)
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encrypted, seq = encryption_session.encrypt(d)
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assert d == encryption_session.decrypt(encrypted)
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def test_encrypt_unicode():
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d = "{'snowman': '\u2603'}"
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seed = secrets.token_bytes(16)
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auth_hash = KlapTransport.generate_auth_hash(Credentials("foo", "bar"))
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encryption_session = KlapEncryptionSession(seed, seed, auth_hash)
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encrypted, seq = encryption_session.encrypt(d)
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decrypted = encryption_session.decrypt(encrypted)
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assert d == decrypted
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@pytest.mark.parametrize(
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"device_credentials, expectation",
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[
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(Credentials("foo", "bar"), does_not_raise()),
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(Credentials(), does_not_raise()),
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(
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get_default_credentials(DEFAULT_CREDENTIALS["KASA"]),
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does_not_raise(),
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),
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(
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Credentials("shouldfail", "shouldfail"),
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pytest.raises(AuthenticationException),
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),
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],
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ids=("client", "blank", "kasa_setup", "shouldfail"),
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)
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@pytest.mark.parametrize(
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"transport_class, seed_auth_hash_calc",
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[
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pytest.param(KlapTransport, lambda c, s, a: c + a, id="KLAP"),
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pytest.param(KlapTransportV2, lambda c, s, a: c + s + a, id="KLAPV2"),
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],
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)
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async def test_handshake1(
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mocker, device_credentials, expectation, transport_class, seed_auth_hash_calc
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):
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async def _return_handshake1_response(url, params=None, data=None, *_, **__):
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nonlocal client_seed, server_seed, device_auth_hash
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client_seed = data
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seed_auth_hash = _sha256(
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seed_auth_hash_calc(client_seed, server_seed, device_auth_hash)
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)
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return _mock_response(200, server_seed + seed_auth_hash)
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client_seed = None
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server_seed = secrets.token_bytes(16)
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client_credentials = Credentials("foo", "bar")
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device_auth_hash = transport_class.generate_auth_hash(device_credentials)
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mocker.patch.object(
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aiohttp.ClientSession, "post", side_effect=_return_handshake1_response
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)
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config = DeviceConfig("127.0.0.1", credentials=client_credentials)
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protocol = IotProtocol(transport=transport_class(config=config))
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with expectation:
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(
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local_seed,
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device_remote_seed,
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auth_hash,
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) = await protocol._transport.perform_handshake1()
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assert local_seed == client_seed
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assert device_remote_seed == server_seed
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assert device_auth_hash == auth_hash
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await protocol.close()
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@pytest.mark.parametrize(
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"transport_class, seed_auth_hash_calc1, seed_auth_hash_calc2",
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[
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pytest.param(
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KlapTransport, lambda c, s, a: c + a, lambda c, s, a: s + a, id="KLAP"
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),
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pytest.param(
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KlapTransportV2,
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lambda c, s, a: c + s + a,
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lambda c, s, a: s + c + a,
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id="KLAPV2",
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),
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],
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)
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async def test_handshake(
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mocker, transport_class, seed_auth_hash_calc1, seed_auth_hash_calc2
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):
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async def _return_handshake_response(url, params=None, data=None, *_, **__):
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nonlocal client_seed, server_seed, device_auth_hash
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if url == "http://127.0.0.1/app/handshake1":
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client_seed = data
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seed_auth_hash = _sha256(
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seed_auth_hash_calc1(client_seed, server_seed, device_auth_hash)
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)
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return _mock_response(200, server_seed + seed_auth_hash)
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elif url == "http://127.0.0.1/app/handshake2":
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seed_auth_hash = _sha256(
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seed_auth_hash_calc2(client_seed, server_seed, device_auth_hash)
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)
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assert data == seed_auth_hash
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return _mock_response(response_status, b"")
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client_seed = None
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server_seed = secrets.token_bytes(16)
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client_credentials = Credentials("foo", "bar")
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device_auth_hash = transport_class.generate_auth_hash(client_credentials)
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mocker.patch.object(
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aiohttp.ClientSession, "post", side_effect=_return_handshake_response
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)
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config = DeviceConfig("127.0.0.1", credentials=client_credentials)
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protocol = IotProtocol(transport=transport_class(config=config))
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protocol._transport.http_client = aiohttp.ClientSession()
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response_status = 200
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await protocol._transport.perform_handshake()
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assert protocol._transport._handshake_done is True
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response_status = 403
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with pytest.raises(AuthenticationException):
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await protocol._transport.perform_handshake()
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assert protocol._transport._handshake_done is False
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await protocol.close()
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async def test_query(mocker):
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async def _return_response(url, params=None, data=None, *_, **__):
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nonlocal client_seed, server_seed, device_auth_hash, seq
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if url == "http://127.0.0.1/app/handshake1":
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client_seed = data
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client_seed_auth_hash = _sha256(data + device_auth_hash)
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return _mock_response(200, server_seed + client_seed_auth_hash)
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elif url == "http://127.0.0.1/app/handshake2":
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return _mock_response(200, b"")
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elif url == "http://127.0.0.1/app/request":
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encryption_session = KlapEncryptionSession(
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protocol._transport._encryption_session.local_seed,
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protocol._transport._encryption_session.remote_seed,
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protocol._transport._encryption_session.user_hash,
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)
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seq = params.get("seq")
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encryption_session._seq = seq - 1
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encrypted, seq = encryption_session.encrypt('{"great": "success"}')
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seq = seq
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return _mock_response(200, encrypted)
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client_seed = None
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last_seq = None
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seq = None
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server_seed = secrets.token_bytes(16)
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client_credentials = Credentials("foo", "bar")
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device_auth_hash = KlapTransport.generate_auth_hash(client_credentials)
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mocker.patch.object(aiohttp.ClientSession, "post", side_effect=_return_response)
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config = DeviceConfig("127.0.0.1", credentials=client_credentials)
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protocol = IotProtocol(transport=KlapTransport(config=config))
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for _ in range(10):
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resp = await protocol.query({})
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assert resp == {"great": "success"}
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# Check the protocol is incrementing the sequence number
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assert last_seq is None or last_seq + 1 == seq
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last_seq = seq
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@pytest.mark.parametrize(
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"response_status, expectation",
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[
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((403, 403, 403), pytest.raises(AuthenticationException)),
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((200, 403, 403), pytest.raises(AuthenticationException)),
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((200, 200, 403), pytest.raises(AuthenticationException)),
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((200, 200, 400), pytest.raises(SmartDeviceException)),
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],
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ids=("handshake1", "handshake2", "request", "non_auth_error"),
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)
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async def test_authentication_failures(mocker, response_status, expectation):
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async def _return_response(url, params=None, data=None, *_, **__):
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nonlocal client_seed, server_seed, device_auth_hash, response_status
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if url == "http://127.0.0.1/app/handshake1":
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client_seed = data
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client_seed_auth_hash = _sha256(data + device_auth_hash)
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return _mock_response(
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response_status[0], server_seed + client_seed_auth_hash
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)
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elif url == "http://127.0.0.1/app/handshake2":
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return _mock_response(response_status[1], b"")
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elif url == "http://127.0.0.1/app/request":
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return _mock_response(response_status[2], None)
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client_seed = None
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server_seed = secrets.token_bytes(16)
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client_credentials = Credentials("foo", "bar")
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device_auth_hash = KlapTransport.generate_auth_hash(client_credentials)
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mocker.patch.object(aiohttp.ClientSession, "post", side_effect=_return_response)
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config = DeviceConfig("127.0.0.1", credentials=client_credentials)
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protocol = IotProtocol(transport=KlapTransport(config=config))
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with expectation:
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await protocol.query({})
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