forked from github.com/eufy_robovac
c5f392c631
* support tuya 3.3 protocol * Switch argument order * Debug logging for demo * Home Assistant config changes * Vacuum has a 'power' property * Formatting changes * Improve Tuya message repr * Include socket error in error output.
581 lines
20 KiB
Python
581 lines
20 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019 Richard Mitchell
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Based on portions of https://github.com/codetheweb/tuyapi/
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#
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# MIT License
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#
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# Copyright (c) 2017 Max Isom
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import asyncio
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import base64
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import json
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from json.decoder import JSONDecodeError
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import logging
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import socket
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import struct
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import sys
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import time
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from cryptography.hazmat.backends.openssl import backend as openssl_backend
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from cryptography.hazmat.primitives.hashes import Hash, MD5
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from cryptography.hazmat.primitives.padding import PKCS7
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_LOGGER = logging.getLogger(__name__)
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MESSAGE_PREFIX_FORMAT = '>IIII'
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MESSAGE_SUFFIX_FORMAT = '>II'
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MAGIC_PREFIX = 0x000055AA
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MAGIC_SUFFIX = 0x0000AA55
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MAGIC_SUFFIX_BYTES = struct.pack('>I', MAGIC_SUFFIX)
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CRC_32_TABLE = [
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
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0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
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0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
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0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
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0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
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0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
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0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
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0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
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0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
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0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
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0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
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0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
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0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
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0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
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0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
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0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
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0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
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0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
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0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
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0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
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0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
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0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
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0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
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0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
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0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
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0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
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0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
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0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
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0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
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0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
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0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
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0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
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0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
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0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
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0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
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0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
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0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
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0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
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0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
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0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
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0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
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0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
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0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
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0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
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0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
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0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
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0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
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0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
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0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
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0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
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0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
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0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
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0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
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0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
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0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
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0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
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0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
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0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
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0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
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0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
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0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
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]
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class TuyaException(Exception):
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"""Base for Tuya exceptions."""
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class InvalidKey(TuyaException):
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"""The local key is invalid."""
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class InvalidMessage(TuyaException):
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"""The message received is invalid."""
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class MessageDecodeFailed(TuyaException):
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"""The message received cannot be decoded as JSON."""
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class ConnectionException(TuyaException):
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"""The socket connection failed."""
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class ConnectionTimeoutException(ConnectionException):
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"""The socket connection timed out."""
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class RequestResponseCommandMismatch(TuyaException):
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"""The command in the response didn't match the one from the request."""
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class TuyaCipher:
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"""Tuya cryptographic helpers."""
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def __init__(self, key, version):
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"""Initialize the cipher."""
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self.version = version
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self.key = key
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self.cipher = Cipher(algorithms.AES(key.encode('ascii')), modes.ECB(),
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backend=openssl_backend)
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def get_prefix_size_and_validate(self, command, encrypted_data):
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try:
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version = tuple(map(int, encrypted_data[:3].decode('utf8').split('.')))
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except UnicodeDecodeError:
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version = (0, 0)
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if version != self.version:
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return 0
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if version < (3, 3):
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hash = encrypted_data[3:19].decode('ascii')
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expected_hash = self.hash(encrypted_data[19:])
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if hash != expected_hash:
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return 0
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return 19
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else:
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if command in (Message.SET_COMMAND, Message.GRATUITOUS_UPDATE):
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_, sequence, __, ___ = struct.unpack_from(
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'>IIIH', encrypted_data, 3)
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return 15
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return 0
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def decrypt(self, command, data):
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prefix_size = self.get_prefix_size_and_validate(command, data)
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data = data[prefix_size:]
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decryptor = self.cipher.decryptor()
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if self.version < (3, 3):
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data = base64.b64decode(data)
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decrypted_data = decryptor.update(data)
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decrypted_data += decryptor.finalize()
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unpadder = PKCS7(128).unpadder()
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unpadded_data = unpadder.update(decrypted_data)
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unpadded_data += unpadder.finalize()
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return unpadded_data
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def encrypt(self, command, data):
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encrypted_data = b''
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if data:
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padder = PKCS7(128).padder()
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padded_data = padder.update(data)
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padded_data += padder.finalize()
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encryptor = self.cipher.encryptor()
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encrypted_data = encryptor.update(padded_data)
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encrypted_data += encryptor.finalize()
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prefix = '.'.join(map(str, self.version)).encode('utf8')
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if self.version < (3, 3):
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payload = base64.b64encode(encrypted_data)
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hash = self.hash(payload)
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prefix += hash.encode('utf8')
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else:
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payload = encrypted_data
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if command in (Message.SET_COMMAND, Message.GRATUITOUS_UPDATE):
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prefix += b'\x00' * 12
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else:
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prefix = b''
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return prefix + payload
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def hash(self, data):
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digest = Hash(MD5(), backend=openssl_backend)
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to_hash = "data={}||lpv={}||{}".format(
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data.decode('ascii'),
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'.'.join(map(str, self.version)),
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self.key
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)
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digest.update(to_hash.encode('utf8'))
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intermediate = digest.finalize().hex()
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return intermediate[8:24]
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def crc(data):
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"""Calculate the Tuya-flavored CRC of some data."""
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c = 0xFFFFFFFF
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for b in data:
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c = (c >> 8) ^ CRC_32_TABLE[(c ^ b) & 255]
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return c ^ 0xFFFFFFFF
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class Message:
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PING_COMMAND = 0x09
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GET_COMMAND = 0x0a
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SET_COMMAND = 0x07
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GRATUITOUS_UPDATE = 0x08
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def __init__(self, command, payload=None, sequence=None, encrypt_for=None):
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if payload is None:
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payload = b''
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self.payload = payload
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self.command = command
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if sequence is None:
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# Use millisecond process time as the sequence number. Not ideal,
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# but good for one month's continuous connection time though.
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sequence = int(time.perf_counter() * 1000) & 0xFFFFFFFF
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self.sequence = sequence
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self.encrypt = False
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self.device = None
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if encrypt_for is not None:
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self.device = encrypt_for
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self.encrypt = True
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def __repr__(self):
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return "{}({}, {!r}, {!r}, {})".format(
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self.__class__.__name__,
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hex(self.command),
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self.payload,
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self.sequence,
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"<Device {}>".format(self.device) if self.device else None
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)
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def hex(self):
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return self.bytes().hex()
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def bytes(self):
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payload_data = self.payload
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if isinstance(payload_data, dict):
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payload_data = json.dumps(
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payload_data,
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separators=(',',':')
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)
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if not isinstance(payload_data, bytes):
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payload_data = payload_data.encode('utf8')
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if self.encrypt:
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payload_data = self.device.cipher.encrypt(self.command, payload_data)
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payload_size = len(payload_data) + struct.calcsize(MESSAGE_SUFFIX_FORMAT)
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header = struct.pack(
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MESSAGE_PREFIX_FORMAT,
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MAGIC_PREFIX,
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self.sequence,
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self.command,
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payload_size,
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)
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if self.device and self.device.version >= (3, 3):
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checksum = crc(header + payload_data)
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else:
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checksum = crc(payload_data)
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footer = struct.pack(
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MESSAGE_SUFFIX_FORMAT,
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checksum,
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MAGIC_SUFFIX
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)
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return (
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header +
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payload_data +
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footer
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)
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__bytes__ = bytes
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class AsyncWrappedCallback:
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def __init__(self, request, callback):
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self.request = request
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self.callback = callback
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self.devices = []
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def register(self, device):
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self.devices.append(device)
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device._handlers.setdefault(self.request.command, [])
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device._handlers[self.request.command].append(self)
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def unregister(self, device):
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self.devices.remove(device)
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device._handlers[self.request.command].remove(self)
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def unregister_all(self):
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while self.devices:
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device = self.devices.pop()
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device._handlers[self.request.command].remove(self)
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async def __call__(self, response, device):
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if response.sequence == self.request.sequence:
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asyncio.ensure_future(self.callback(response, device))
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self.unregister(device)
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async def async_send(self, device, callback=None):
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if callback is not None:
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wrapped = self.AsyncWrappedCallback(self, callback)
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wrapped.register(device)
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await device._async_send(self)
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@classmethod
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def from_bytes(cls, data, cipher=None):
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try:
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prefix, sequence, command, payload_size = struct.unpack_from(
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MESSAGE_PREFIX_FORMAT,
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data
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)
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except struct.error as e:
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raise InvalidMessage("Invalid message header format.") from e
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if prefix != MAGIC_PREFIX:
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raise InvalidMessage("Magic prefix missing from message.")
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# check for an optional return code
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header_size = struct.calcsize(MESSAGE_PREFIX_FORMAT)
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try:
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return_code, = struct.unpack_from('>I', data, header_size)
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except struct.error as e:
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raise InvalidMessage("Unable to unpack return code.") from e
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if return_code >> 8:
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payload_data = data[header_size:header_size + payload_size - struct.calcsize(MESSAGE_SUFFIX_FORMAT)]
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return_code = None
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else:
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payload_data = data[header_size + struct.calcsize('>I'):header_size + payload_size - struct.calcsize(MESSAGE_SUFFIX_FORMAT)]
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try:
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expected_crc, suffix = struct.unpack_from(
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MESSAGE_SUFFIX_FORMAT,
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data,
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header_size + payload_size - struct.calcsize(MESSAGE_SUFFIX_FORMAT)
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)
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except struct.error as e:
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raise InvalidMessage("Invalid message suffix format.") from e
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if suffix != MAGIC_SUFFIX:
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raise InvalidMessage("Magic suffix missing from message")
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actual_crc = crc(data[:header_size + payload_size - struct.calcsize(MESSAGE_SUFFIX_FORMAT)])
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if expected_crc != actual_crc:
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raise InvalidMessage("CRC check failed")
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payload = None
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if payload_data:
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try:
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payload_data = cipher.decrypt(command, payload_data)
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except ValueError as e:
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pass
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try:
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payload_text = payload_data.decode('utf8')
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except UnicodeDecodeError as e:
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_LOGGER.debug(payload_data.hex())
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_LOGGER.error(e)
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raise MessageDecodeFailed() from e
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try:
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payload = json.loads(payload_text)
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except json.decoder.JSONDecodeError as e:
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# data may be encrypted
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_LOGGER.debug(payload_data.hex())
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_LOGGER.error(e)
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raise MessageDecodeFailed() from e
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return cls(command, payload, sequence)
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|
|
|
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def _call_async(fn, *args):
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loop = None
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if sys.version_info >= (3, 7):
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try:
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loop = asyncio.get_running_loop()
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except RuntimeError:
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pass
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|
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loop = asyncio.get_event_loop()
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|
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def wrapper(fn, *args):
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asyncio.ensure_future(fn(*args))
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loop.call_soon(wrapper, fn, *args)
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|
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class TuyaDevice:
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"""Represents a generic Tuya device."""
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|
|
|
PING_INTERVAL = 10
|
|
|
|
def __init__(self, device_id, host, local_key=None, port=6668,
|
|
gateway_id=None, version=(3, 3), timeout=10):
|
|
"""Initialize the device."""
|
|
self.device_id = device_id
|
|
self.host = host
|
|
self.port = port
|
|
if not gateway_id:
|
|
gateway_id = self.device_id
|
|
self.gateway_id = gateway_id
|
|
self.version = version
|
|
self.timeout = timeout
|
|
self.last_pong = 0
|
|
|
|
if len(local_key) != 16:
|
|
raise InvalidKey("Local key should be a 16-character string")
|
|
|
|
self.cipher = TuyaCipher(local_key, self.version)
|
|
self.writer = None
|
|
self._handlers = {
|
|
Message.GET_COMMAND: [self.async_update_state],
|
|
Message.GRATUITOUS_UPDATE: [self.async_update_state],
|
|
Message.PING_COMMAND: [self._async_pong_received],
|
|
}
|
|
self._dps = {}
|
|
self._connected = False
|
|
|
|
def __repr__(self):
|
|
return "{}({!r}, {!r}, {!r}, {!r})".format(
|
|
self.__class__.__name__,
|
|
self.device_id,
|
|
self.host,
|
|
self.port,
|
|
self.cipher.key
|
|
)
|
|
|
|
def __str__(self):
|
|
return "{} ({}:{})".format(self.device_id, self.host, self.port)
|
|
|
|
async def async_connect(self, callback=None):
|
|
if self._connected:
|
|
return
|
|
sock = socket.socket(family=socket.AF_INET, type=socket.SOCK_STREAM)
|
|
sock.settimeout(self.timeout)
|
|
_LOGGER.debug("Connecting to {}".format(self))
|
|
try:
|
|
sock.connect((self.host, self.port))
|
|
except socket.timeout as e:
|
|
raise ConnectionTimeoutException("Connection timed out") from e
|
|
self.reader, self.writer = await asyncio.open_connection(sock=sock)
|
|
self._connected = True
|
|
|
|
asyncio.ensure_future(self._async_handle_message())
|
|
asyncio.ensure_future(self._async_ping())
|
|
asyncio.ensure_future(self.async_get(callback))
|
|
|
|
async def async_disconnect(self):
|
|
_LOGGER.debug("Disconnected from {}".format(self))
|
|
self._connected = False
|
|
self.last_pong = 0
|
|
if self.writer is not None:
|
|
self.writer.close()
|
|
|
|
async def async_get(self, callback=None):
|
|
payload = {
|
|
'gwId': self.gateway_id,
|
|
'devId': self.device_id
|
|
}
|
|
maybe_self = None if self.version < (3, 3) else self
|
|
message = Message(Message.GET_COMMAND, payload, encrypt_for=maybe_self)
|
|
return await message.async_send(self, callback)
|
|
|
|
async def async_set(self, dps, callback=None):
|
|
t = int(time.time())
|
|
payload = {
|
|
'devId': self.device_id,
|
|
'uid': '',
|
|
't': t,
|
|
'dps': dps
|
|
}
|
|
message = Message(Message.SET_COMMAND, payload, encrypt_for=self)
|
|
await message.async_send(self, callback)
|
|
|
|
def set(self, dps):
|
|
_call_async(self.async_set, dps)
|
|
|
|
async def _async_ping(self):
|
|
self.last_ping = time.time()
|
|
maybe_self = None if self.version < (3, 3) else self
|
|
message = Message(Message.PING_COMMAND, sequence=0,
|
|
encrypt_for=maybe_self)
|
|
await self._async_send(message)
|
|
await asyncio.sleep(self.PING_INTERVAL)
|
|
if self.last_pong < self.last_ping:
|
|
await self.async_disconnect()
|
|
else:
|
|
asyncio.ensure_future(self._async_ping())
|
|
|
|
async def _async_pong_received(self, message, device):
|
|
self.last_pong = time.time()
|
|
|
|
async def async_update_state(self, state_message, _):
|
|
self._dps.update(state_message.payload["dps"])
|
|
_LOGGER.info("Received updated state {}: {}".format(self, self._dps))
|
|
|
|
@property
|
|
def state(self):
|
|
return dict(self._dps)
|
|
|
|
@state.setter
|
|
def state_setter(self, new_values):
|
|
asyncio.ensure_future(self.async_set(new_values))
|
|
|
|
async def _async_handle_message(self):
|
|
try:
|
|
response_data = await self.reader.readuntil(MAGIC_SUFFIX_BYTES)
|
|
except socket.error as e:
|
|
_LOGGER.error("Connection to {} failed: {}".format(self, e))
|
|
asyncio.ensure_future(self.async_disconnect())
|
|
return
|
|
|
|
try:
|
|
message = Message.from_bytes(response_data, self.cipher)
|
|
except InvalidMessage as e:
|
|
_LOGGER.error("Invalid message from {}: {}".format(self, e))
|
|
except MessageDecodeFailed as e:
|
|
_LOGGER.error("Failed to decrypt message from {}".format(self))
|
|
else:
|
|
_LOGGER.debug("Received message from {}: {}".format(self, message))
|
|
for c in self._handlers.get(message.command, []):
|
|
asyncio.ensure_future(c(message, self))
|
|
|
|
asyncio.ensure_future(self._async_handle_message())
|
|
|
|
async def _async_send(self, message, retries=4):
|
|
await self.async_connect()
|
|
_LOGGER.debug("Sending to {}: {}".format(self, message))
|
|
try:
|
|
self.writer.write(message.bytes())
|
|
except (socket.timeout, socket.error, OSError) as e:
|
|
if retries == 0:
|
|
raise ConnectionException("Failed to send data to {}".format(
|
|
self)) from e
|
|
await self.async_connect()
|
|
await self_.async_send(message, retries=retries - 1)
|