571 lines
18 KiB
Python
571 lines
18 KiB
Python
from __future__ import annotations
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import asyncio
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import base64
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from datetime import timedelta
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from typing import Any
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from unittest.mock import MagicMock
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import pytest
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from noise.connection import NoiseConnection # type: ignore[import-untyped]
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from aioesphomeapi import APIConnection
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from aioesphomeapi._frame_helper import APINoiseFrameHelper, APIPlaintextFrameHelper
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from aioesphomeapi._frame_helper.base import WRITE_EXCEPTIONS
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from aioesphomeapi._frame_helper.noise import ESPHOME_NOISE_BACKEND, NOISE_HELLO
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from aioesphomeapi._frame_helper.plain_text import _bytes_to_varuint as bytes_to_varuint
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from aioesphomeapi._frame_helper.plain_text import (
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_cached_bytes_to_varuint as cached_bytes_to_varuint,
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)
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from aioesphomeapi._frame_helper.plain_text import (
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_cached_varuint_to_bytes as cached_varuint_to_bytes,
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)
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from aioesphomeapi._frame_helper.plain_text import _varuint_to_bytes as varuint_to_bytes
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from aioesphomeapi.core import (
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BadNameAPIError,
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HandshakeAPIError,
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InvalidEncryptionKeyAPIError,
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ProtocolAPIError,
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SocketAPIError,
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)
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from .common import async_fire_time_changed, utcnow
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PREAMBLE = b"\x00"
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def _make_mock_connection() -> tuple[APIConnection, list[tuple[int, bytes]]]:
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"""Make a mock connection."""
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packets: list[tuple[int, bytes]] = []
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class MockConnection(APIConnection):
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def __init__(self, *args: Any, **kwargs: Any) -> None:
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"""Swallow args."""
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def process_packet(self, type_: int, data: bytes):
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packets.append((type_, data))
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def report_fatal_error(self, exc: Exception):
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raise exc
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connection = MockConnection()
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return connection, packets
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class MockAPINoiseFrameHelper(APINoiseFrameHelper):
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def mock_write_frame(self, frame: bytes) -> None:
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"""Write a packet to the socket.
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The entire packet must be written in a single call to write.
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"""
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frame_len = len(frame)
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header = bytes((0x01, (frame_len >> 8) & 0xFF, frame_len & 0xFF))
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try:
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self._writer(header + frame)
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except WRITE_EXCEPTIONS as err:
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raise SocketAPIError(
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f"{self._log_name}: Error while writing data: {err}"
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) from err
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@pytest.mark.parametrize(
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"in_bytes, pkt_data, pkt_type",
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[
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(PREAMBLE + varuint_to_bytes(0) + varuint_to_bytes(1), b"", 1),
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(
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PREAMBLE + varuint_to_bytes(192) + varuint_to_bytes(1) + (b"\x42" * 192),
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(b"\x42" * 192),
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1,
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),
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(
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PREAMBLE + varuint_to_bytes(192) + varuint_to_bytes(100) + (b"\x42" * 192),
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(b"\x42" * 192),
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100,
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),
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(
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PREAMBLE + varuint_to_bytes(4) + varuint_to_bytes(100) + (b"\x42" * 4),
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(b"\x42" * 4),
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100,
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),
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(
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PREAMBLE
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+ varuint_to_bytes(8192)
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+ varuint_to_bytes(8192)
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+ (b"\x42" * 8192),
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(b"\x42" * 8192),
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8192,
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),
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(
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PREAMBLE + varuint_to_bytes(256) + varuint_to_bytes(256) + (b"\x42" * 256),
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(b"\x42" * 256),
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256,
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),
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(
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PREAMBLE + varuint_to_bytes(1) + varuint_to_bytes(32768) + b"\x42",
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b"\x42",
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32768,
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),
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(
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PREAMBLE
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+ varuint_to_bytes(32768)
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+ varuint_to_bytes(32768)
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+ (b"\x42" * 32768),
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(b"\x42" * 32768),
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32768,
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),
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],
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)
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def test_plaintext_frame_helper(
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in_bytes: bytes, pkt_data: bytes, pkt_type: int
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) -> None:
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for _ in range(3):
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connection, packets = _make_mock_connection()
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helper = APIPlaintextFrameHelper(
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connection=connection, client_info="my client", log_name="test"
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)
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helper.data_received(in_bytes)
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pkt = packets.pop()
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type_, data = pkt
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assert type_ == pkt_type
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assert data == pkt_data
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# Make sure we correctly handle fragments
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for i in range(len(in_bytes)):
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helper.data_received(in_bytes[i : i + 1])
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pkt = packets.pop()
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type_, data = pkt
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assert type_ == pkt_type
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assert data == pkt_data
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helper.close()
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@pytest.mark.parametrize(
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"byte_type",
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(bytes, bytearray, memoryview),
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)
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def test_plaintext_frame_helper_protractor_event_loop(byte_type: Any) -> None:
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"""Test the plaintext frame helper with the protractor event loop.
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With the protractor event loop, data_received is called with a bytearray
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instead of bytes.
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https://github.com/esphome/issues/issues/5117
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"""
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for _ in range(3):
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connection, packets = _make_mock_connection()
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helper = APIPlaintextFrameHelper(
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connection=connection, client_info="my client", log_name="test"
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)
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in_bytes = byte_type(
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PREAMBLE + varuint_to_bytes(4) + varuint_to_bytes(100) + (b"\x42" * 4)
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)
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helper.data_received(in_bytes)
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pkt = packets.pop()
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type_, data = pkt
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assert type_ == 100
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assert data == b"\x42" * 4
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# Make sure we correctly handle fragments
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for i in range(len(in_bytes)):
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helper.data_received(in_bytes[i : i + 1])
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pkt = packets.pop()
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type_, data = pkt
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assert type_ == 100
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assert data == b"\x42" * 4
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@pytest.mark.asyncio
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@pytest.mark.parametrize(
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"byte_type",
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(bytes, bytearray, memoryview),
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)
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async def test_noise_protector_event_loop(byte_type: Any) -> None:
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"""Test the noise frame helper with the protractor event loop.
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With the protractor event loop, data_received is called with a bytearray
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instead of bytes.
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https://github.com/esphome/issues/issues/5117
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"""
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outgoing_packets = [
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"010000", # hello packet
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"010031001ed7f7bb0b74085418258ed5928931bc36ade7cf06937fcff089044d4ab142643f1b2c9935bb77696f23d930836737a4",
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]
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incoming_packets = [
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"01000d01736572766963657465737400",
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"0100160148616e647368616b65204d4143206661696c757265",
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]
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk="QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc=",
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expected_name="servicetest",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = MagicMock()
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for pkt in outgoing_packets:
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helper.mock_write_frame(byte_type(bytes.fromhex(pkt)))
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with pytest.raises(InvalidEncryptionKeyAPIError):
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for pkt in incoming_packets:
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helper.data_received(byte_type(bytes.fromhex(pkt)))
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with pytest.raises(InvalidEncryptionKeyAPIError):
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await helper.perform_handshake(30)
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@pytest.mark.asyncio
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async def test_noise_frame_helper_incorrect_key():
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"""Test that the noise frame helper raises InvalidEncryptionKeyAPIError on bad key."""
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outgoing_packets = [
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"010000", # hello packet
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"010031001ed7f7bb0b74085418258ed5928931bc36ade7cf06937fcff089044d4ab142643f1b2c9935bb77696f23d930836737a4",
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]
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incoming_packets = [
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"01000d01736572766963657465737400",
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"0100160148616e647368616b65204d4143206661696c757265",
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]
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk="QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc=",
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expected_name="servicetest",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = MagicMock()
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for pkt in outgoing_packets:
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helper.mock_write_frame(bytes.fromhex(pkt))
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with pytest.raises(InvalidEncryptionKeyAPIError):
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for pkt in incoming_packets:
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helper.data_received(bytes.fromhex(pkt))
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with pytest.raises(InvalidEncryptionKeyAPIError):
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await helper.perform_handshake(30)
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@pytest.mark.asyncio
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async def test_noise_frame_helper_incorrect_key_fragments():
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"""Test that the noise frame helper raises InvalidEncryptionKeyAPIError on bad key with fragmented packets."""
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outgoing_packets = [
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"010000", # hello packet
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"010031001ed7f7bb0b74085418258ed5928931bc36ade7cf06937fcff089044d4ab142643f1b2c9935bb77696f23d930836737a4",
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]
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incoming_packets = [
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"01000d01736572766963657465737400",
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"0100160148616e647368616b65204d4143206661696c757265",
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]
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk="QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc=",
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expected_name="servicetest",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = MagicMock()
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for pkt in outgoing_packets:
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helper.mock_write_frame(bytes.fromhex(pkt))
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with pytest.raises(InvalidEncryptionKeyAPIError):
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for pkt in incoming_packets:
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in_pkt = bytes.fromhex(pkt)
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for i in range(len(in_pkt)):
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helper.data_received(in_pkt[i : i + 1])
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with pytest.raises(InvalidEncryptionKeyAPIError):
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await helper.perform_handshake(30)
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@pytest.mark.asyncio
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async def test_noise_incorrect_name():
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"""Test we raise on bad name."""
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outgoing_packets = [
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"010000", # hello packet
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"010031001ed7f7bb0b74085418258ed5928931bc36ade7cf06937fcff089044d4ab142643f1b2c9935bb77696f23d930836737a4",
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]
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incoming_packets = [
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"01000d01736572766963657465737400",
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"0100160148616e647368616b65204d4143206661696c757265",
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]
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk="QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc=",
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expected_name="wrongname",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = MagicMock()
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for pkt in outgoing_packets:
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helper.mock_write_frame(bytes.fromhex(pkt))
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with pytest.raises(BadNameAPIError):
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for pkt in incoming_packets:
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helper.data_received(bytes.fromhex(pkt))
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with pytest.raises(BadNameAPIError):
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await helper.perform_handshake(30)
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@pytest.mark.asyncio
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async def test_noise_timeout():
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"""Test we raise on bad name."""
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outgoing_packets = [
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"010000", # hello packet
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"010031001ed7f7bb0b74085418258ed5928931bc36ade7cf06937fcff089044d4ab142643f1b2c9935bb77696f23d930836737a4",
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]
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk="QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc=",
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expected_name="wrongname",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = MagicMock()
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for pkt in outgoing_packets:
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helper.mock_write_frame(bytes.fromhex(pkt))
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task = asyncio.create_task(helper.perform_handshake(30))
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await asyncio.sleep(0)
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async_fire_time_changed(utcnow() + timedelta(seconds=60))
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await asyncio.sleep(0)
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with pytest.raises(HandshakeAPIError):
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await task
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VARUINT_TESTCASES = [
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(0, b"\x00"),
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(42, b"\x2a"),
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(127, b"\x7f"),
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(128, b"\x80\x01"),
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(300, b"\xac\x02"),
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(65536, b"\x80\x80\x04"),
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]
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@pytest.mark.parametrize("val, encoded", VARUINT_TESTCASES)
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def test_varuint_to_bytes(val, encoded):
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assert varuint_to_bytes(val) == encoded
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assert cached_varuint_to_bytes(val) == encoded
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@pytest.mark.parametrize("val, encoded", VARUINT_TESTCASES)
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def test_bytes_to_varuint(val, encoded):
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assert bytes_to_varuint(encoded) == val
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assert cached_bytes_to_varuint(encoded) == val
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@pytest.mark.asyncio
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async def test_noise_frame_helper_handshake_failure():
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"""Test the noise frame helper handshake failure."""
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noise_psk = "QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc="
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psk_bytes = base64.b64decode(noise_psk)
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writes = []
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def _writer(data: bytes):
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writes.append(data)
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connection, _ = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk=noise_psk,
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expected_name="servicetest",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = _writer
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proto = NoiseConnection.from_name(
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b"Noise_NNpsk0_25519_ChaChaPoly_SHA256", backend=ESPHOME_NOISE_BACKEND
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)
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proto.set_as_responder()
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proto.set_psks(psk_bytes)
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proto.set_prologue(b"NoiseAPIInit\x00\x00")
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proto.start_handshake()
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handshake_task = asyncio.create_task(helper.perform_handshake(30))
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await asyncio.sleep(0) # let the task run to read the hello packet
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assert len(writes) == 1
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handshake_pkt = writes.pop()
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noise_hello = handshake_pkt[0:3]
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pkt_header = handshake_pkt[3:6]
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assert noise_hello == NOISE_HELLO
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assert pkt_header[0] == 1 # type
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pkg_length_high = pkt_header[1]
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pkg_length_low = pkt_header[2]
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pkg_length = (pkg_length_high << 8) + pkg_length_low
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assert pkg_length == 49
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noise_prefix = handshake_pkt[6:7]
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assert noise_prefix == b"\x00"
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encrypted_payload = handshake_pkt[7:]
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decrypted = proto.read_message(encrypted_payload)
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assert decrypted == b""
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hello_pkt = b"\x01servicetest\0"
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preamble = 1
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hello_pkg_length = len(hello_pkt)
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hello_pkg_length_high = (hello_pkg_length >> 8) & 0xFF
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hello_pkg_length_low = hello_pkg_length & 0xFF
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hello_header = bytes((preamble, hello_pkg_length_high, hello_pkg_length_low))
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hello_pkt_with_header = hello_header + hello_pkt
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helper.data_received(hello_pkt_with_header)
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error_pkt = b"\x01forced to fail"
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preamble = 1
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error_pkg_length = len(error_pkt)
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error_pkg_length_high = (error_pkg_length >> 8) & 0xFF
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error_pkg_length_low = error_pkg_length & 0xFF
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error_header = bytes((preamble, error_pkg_length_high, error_pkg_length_low))
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error_pkt_with_header = error_header + error_pkt
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with pytest.raises(HandshakeAPIError, match="forced to fail"):
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helper.data_received(error_pkt_with_header)
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with pytest.raises(HandshakeAPIError, match="forced to fail"):
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await handshake_task
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@pytest.mark.asyncio
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async def test_noise_frame_helper_handshake_success_with_single_packet():
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"""Test the noise frame helper handshake success with a single packet."""
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noise_psk = "QRTIErOb/fcE9Ukd/5qA3RGYMn0Y+p06U58SCtOXvPc="
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psk_bytes = base64.b64decode(noise_psk)
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writes = []
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def _writer(data: bytes):
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writes.append(data)
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connection, packets = _make_mock_connection()
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helper = MockAPINoiseFrameHelper(
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connection=connection,
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noise_psk=noise_psk,
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expected_name="servicetest",
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client_info="my client",
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log_name="test",
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)
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helper._transport = MagicMock()
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helper._writer = _writer
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proto = NoiseConnection.from_name(
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b"Noise_NNpsk0_25519_ChaChaPoly_SHA256", backend=ESPHOME_NOISE_BACKEND
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)
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proto.set_as_responder()
|
|
proto.set_psks(psk_bytes)
|
|
proto.set_prologue(b"NoiseAPIInit\x00\x00")
|
|
proto.start_handshake()
|
|
|
|
handshake_task = asyncio.create_task(helper.perform_handshake(30))
|
|
await asyncio.sleep(0) # let the task run to read the hello packet
|
|
|
|
assert len(writes) == 1
|
|
handshake_pkt = writes.pop()
|
|
|
|
noise_hello = handshake_pkt[0:3]
|
|
pkt_header = handshake_pkt[3:6]
|
|
assert noise_hello == NOISE_HELLO
|
|
assert pkt_header[0] == 1 # type
|
|
pkg_length_high = pkt_header[1]
|
|
pkg_length_low = pkt_header[2]
|
|
pkg_length = (pkg_length_high << 8) + pkg_length_low
|
|
assert pkg_length == 49
|
|
noise_prefix = handshake_pkt[6:7]
|
|
assert noise_prefix == b"\x00"
|
|
encrypted_payload = handshake_pkt[7:]
|
|
|
|
decrypted = proto.read_message(encrypted_payload)
|
|
assert decrypted == b""
|
|
|
|
hello_pkt = b"\x01servicetest\0"
|
|
preamble = 1
|
|
hello_pkg_length = len(hello_pkt)
|
|
hello_pkg_length_high = (hello_pkg_length >> 8) & 0xFF
|
|
hello_pkg_length_low = hello_pkg_length & 0xFF
|
|
hello_header = bytes((preamble, hello_pkg_length_high, hello_pkg_length_low))
|
|
hello_pkt_with_header = hello_header + hello_pkt
|
|
helper.data_received(hello_pkt_with_header)
|
|
|
|
handshake = proto.write_message(b"")
|
|
handshake_pkt = b"\x00" + handshake
|
|
preamble = 1
|
|
handshake_pkg_length = len(handshake_pkt)
|
|
handshake_pkg_length_high = (handshake_pkg_length >> 8) & 0xFF
|
|
handshake_pkg_length_low = handshake_pkg_length & 0xFF
|
|
handshake_header = bytes(
|
|
(preamble, handshake_pkg_length_high, handshake_pkg_length_low)
|
|
)
|
|
handshake_with_header = handshake_header + handshake_pkt
|
|
|
|
helper.data_received(handshake_with_header)
|
|
|
|
assert not writes
|
|
|
|
await handshake_task
|
|
helper.write_packets([(1, b"to device")])
|
|
encrypted_packet = writes.pop()
|
|
header = encrypted_packet[0:1]
|
|
assert header == b"\x01"
|
|
pkg_length_high = encrypted_packet[1]
|
|
pkg_length_low = encrypted_packet[2]
|
|
pkg_length = (pkg_length_high << 8) + pkg_length_low
|
|
assert len(encrypted_packet) == 3 + pkg_length
|
|
|
|
msg_type = 42
|
|
msg_type_high = (msg_type >> 8) & 0xFF
|
|
msg_type_low = msg_type & 0xFF
|
|
msg_length = len(encrypted_payload)
|
|
msg_length_high = (msg_length >> 8) & 0xFF
|
|
msg_length_low = msg_length & 0xFF
|
|
msg_header = bytes((msg_type_high, msg_type_low, msg_length_high, msg_length_low))
|
|
encrypted_payload = proto.encrypt(msg_header + b"from device")
|
|
|
|
preamble = 1
|
|
encrypted_pkg_length = len(encrypted_payload)
|
|
encrypted_pkg_length_high = (encrypted_pkg_length >> 8) & 0xFF
|
|
encrypted_pkg_length_low = encrypted_pkg_length & 0xFF
|
|
encrypted_header = bytes(
|
|
(preamble, encrypted_pkg_length_high, encrypted_pkg_length_low)
|
|
)
|
|
helper.data_received(encrypted_header + encrypted_payload)
|
|
|
|
assert packets == [(42, b"from device")]
|
|
helper.close()
|
|
|
|
with pytest.raises(ProtocolAPIError, match="Connection closed"):
|
|
helper.data_received(encrypted_header + encrypted_payload)
|