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uvk5.py
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uvk5.py
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#!/usr/bin/env python3
from binascii import crc_hqx
from itertools import cycle
import os
import struct
from sys import stderr, argv
from pathlib import Path
from time import time
from io import StringIO
from serial import Serial
DATA_DIR = Path(__file__).parent / 'data'
KEY_FW = (DATA_DIR / 'key-fw.bin').read_bytes()
KEY_COMM = (DATA_DIR / 'key-comm.bin').read_bytes()
V_START = 8192
V_END = V_START + 16
CRC_LEN = 2
def chunk(data, n):
for i in range(0,len(data), n):
yield data[i:i+n]
def eprint(*args, **kwargs):
print(*args, **kwargs, file=stderr)
def xor_fw(var):
return bytes(a ^ b for a, b in zip(var, cycle(KEY_FW)))
def xor_comm(var):
return bytes(a ^ b for a, b in zip(var, cycle(KEY_COMM)))
def make_16byte_version(version):
return bytes([ord(c) for c in version] + [0] * (16 - len(version)))
def i2b16(val):
return int(val).to_bytes(2,'little')
def i2b32(val):
return int(val).to_bytes(4,'little')
def b2i(data):
return int.from_bytes(data, 'little')
def len16(data):
return i2b16(len(data))
def crc16(data):
return i2b16(crc_hqx(data, 0))
def is_decrypted(data):
return data[:4] == b'\x88\x13\x00\x20' or data[:4] == b'\x88\x11\x00\x20'
def search_for_version(data):
pre = bytes.fromhex('2135D5401303E980')
plen = len(pre)
for i in range(len(data)-plen):
if data[i:i+plen] == pre:
return data[i+plen:i+plen+16].decode(errors='ignore').rstrip('\x00').split('_')[1]
return 'unknown'
def decrypt(data):
decrypted = xor_fw(data)
version = decrypted[V_START:V_END].decode().rstrip('\x00')
return (decrypted[:V_START] + decrypted[V_END:-CRC_LEN], version)
def encrypt(data, version='2.01.26'):
v = make_16byte_version(version)
encrypted = xor_fw(data[:V_START] + v + data[V_START:])
checksum = crc16(encrypted)
return encrypted + checksum
class Firmware(bytearray):
@classmethod
def load(cls, path):
data = Path(path).read_bytes()
if is_decrypted(data):
version = search_for_version(data)
else:
data, version = decrypt(data)
return globals().get(f'Firmware_{version.replace(".", "_")}', cls)(data, version)
def __init__(self, data, version) -> None:
super().__init__(data)
self.version = version
def compare(self, fw):
a = None
la = len(self)
lb = len(fw)
changes = {}
for i in range(min(la, lb)):
differ = self[i] != fw[i]
if not differ:
a = None
continue
if not a:
a = '0x%x' % i
changes[a] = [bytearray(), bytearray()]
changes[a][0].append(self[i])
changes[a][1].append(fw[i])
for addr, ch in changes.items():
print(f'{addr}:', ch[0].hex(), ch[1].hex())
def search(self, q):
search_for_len = len(q)
for i in range(len(self)):
if self[i:i+search_for_len] == q:
print(f'[{i}]: {self[i:i+32]}')
def patch_single(self, addr, new_value, size=4):
old_bytes = self[addr:addr+size]
old_value = int.from_bytes(old_bytes, 'little')
new_bytes = int(new_value).to_bytes(size, 'little')
self[addr:addr+size] = new_bytes
def write(self, path=None):
encrypted = encrypt(self, self.version)
if path:
pass
else:
os.write(1, encrypted)
def write_raw(self, path=None):
if path:
pass
else:
os.write(1, self)
class FirmwareModifiable(Firmware):
def apply_mods(self, mod_names):
for mod in mod_names:
getattr(self, f'mod_{mod}')()
def get_available_mods(self):
for func in dir(self):
if callable(getattr(self, func)) and func.startswith('mod_'):
yield func[4:]
def mod_unlimit_rx(self):
self.patch_single(self.ADR_BANDS[0][0], 18_000_000//10)
self.patch_single(self.ADR_BANDS[6][1], 1_300_000_000//10)
self.patch_single(self.ADR_LIMITS[0], 18_000_000//10)
self.patch_single(self.ADR_LIMITS[1], 1_300_000_000//10)
def mod_unlimit_tx(self):
self.patch_single(self.ADR_TX_CHECK, b'\x5d\xe0', 2)
class Firmware_2_01_17(FirmwareModifiable):
ADR_BANDS = [
[0xEAE4,0xEB00],
[0xEAE8,0xEB04],
[0xEAEC,0xEB08],
[0xEAF0,0xEB0C],
[0xEAF4,0xEB10],
[0xEAF8,0xEB14],
[0xEAFC,0xEB18],
]
ADR_LIMITS = [0x1AF0, 0x1AF4]
class Firmware_2_01_26(FirmwareModifiable):
ADR_BANDS = [
[0xE074, 0xE090],
[0xE078, 0xE094],
[0xE07C, 0xE098],
[0xE080, 0xE09C],
[0xE084, 0xE0A0],
[0xE088, 0xE0A4],
[0xE08C, 0xE0A8],
]
ADR_LIMITS = [0x150C, 0x1510]
ADR_TX_CHECK = 0x180E
class UVK5(Serial):
BLOCK_SIZE = 0x80
PREAMBLE = b'\xab\xcd'
POSTAMBLE = b'\xdc\xba'
CMD_VERSION_REQ = 0x0514
CMD_VERSION_RES = 0x0515
CMD_SETTINGS_REQ = 0x051B
CMD_SETTINGS_RES = 0x051C
CMD_SETTINGS_WRITE_REQ = 0x051D # then addr (0x0E70) then size (0x0160) then data
def __init__(self, port: str | None = None) -> None:
self.timestamp = i2b32(time())
super().__init__(port, 38400, timeout=5)
def send_firmware(self, fw:Firmware):
for block, data in enumerate(chunk(fw, UVK5.BLOCK_SIZE)):
offset = block * UVK5.BLOCK_SIZE
self.write_fw(offset, data)
exit(128)
def write_fw(self, offset, data):
eprint('FW write not implemented yet', offset, len(data))
def get_version(self):
return self.cmd(UVK5.CMD_VERSION_REQ)[1][:10].decode().rstrip('\x00')
def read_mem(self, offset, size):
return self.cmd(UVK5.CMD_SETTINGS_REQ, i2b32(offset) + i2b16(size))
def write_patch(self):
from patch import PATCH
print(len(PATCH))
def divide_chunks(l, n):
for i in range(0, len(l), n):
yield l[i:i + n]
offset = 0
for chunk in divide_chunks(PATCH,8):
print(f"Write at {offset}...")
self.cmdw(0x061D, offset, bytes(chunk))
offset += len(chunk)
def cmd(self, id, body = b''):
self.write(self._cmd_make_req(id, body))
preamble = self.read(2)
if preamble != UVK5.PREAMBLE:
raise ValueError('Bad response (PRE)', preamble)
payload_len = b2i(self.read(2)) + 2 # CRC len
payload = xor_comm(self.read(payload_len))
# crc = payload[-2:]
postamble = self.read(2)
if postamble != UVK5.POSTAMBLE:
raise ValueError('Bad response (POST)', postamble, payload, payload_len)
# print(data.hex())
cmd_id = b2i(payload[:2])
data_len = b2i(payload[2:4])
data = payload[4:4+data_len]
return (cmd_id, data)
def cmdw(self, id, address,payload):
self.write(self._cmd_make_reqw(id, address, payload))
preamble = self.read(2)
if preamble != UVK5.PREAMBLE:
raise ValueError('Bad response (PRE)', preamble)
payload_len = b2i(self.read(2)) + 2 # CRC len
payload = xor_comm(self.read(payload_len))
# crc = payload[-2:]
postamble = self.read(2)
if postamble != UVK5.POSTAMBLE:
raise ValueError('Bad response (POST)', postamble, payload, payload_len)
# print(data.hex())
cmd_id = b2i(payload[:2])
data_len = b2i(payload[2:4])
data = payload[4:4+data_len]
return (cmd_id, data)
def channels(self):
names = []
settings = []
data_size = 16 * 200
names_offset = 0x0F50
settings_offset = 0x0000
passes = data_size//UVK5.BLOCK_SIZE
out = StringIO()
for block in range(passes):
offset = names_offset + block*UVK5.BLOCK_SIZE
names_set = self.read_mem(offset, UVK5.BLOCK_SIZE)[1][4:]
names += [name.decode(errors='ignore').rstrip('\x00') for name in chunk(names_set, 16)]
for block in range(passes):
offset = settings_offset + block*UVK5.BLOCK_SIZE
settings_set = self.read_mem(offset, UVK5.BLOCK_SIZE)[1][4:]
settings += [(b2i(setting[:4])/100000.0, ) for setting in chunk(settings_set, 16)]
for i, name in enumerate(names):
if name:
print(f'{i+1:0>3}. {name: <16} {settings[i][0]:0<8} M', file=out)
else:
print(f'{i+1:0>3}. -', file=out)
return out.getvalue()
def read_eeprom(self, offset, size):
size = int(size) if size else UVK5.BLOCK_SIZE
data = self.read_mem(offset, size)
print(data[1])
def _cmd_make_req(self, cmd_id, body=b''):
data = body + self.timestamp
payload = i2b16(cmd_id) + len16(data) + data
encoded_payload = xor_comm(payload + crc16(payload))
return UVK5.PREAMBLE + len16(payload) + encoded_payload + UVK5.POSTAMBLE
def _cmd_make_reqw(self, cmd_id, address, payload):
payload = i2b16(cmd_id) + struct.pack('<HHH',len(payload)+8, address, len(payload)) + self.timestamp + payload
encoded_payload = xor_comm(payload + crc16(payload))
return UVK5.PREAMBLE + len16(payload) + encoded_payload + UVK5.POSTAMBLE
if __name__ == '__main__':
if len(argv) < 3:
eprint(f'Usage: {argv[0]} <port> <command:(channels|version)> [args]')
exit(255)
port = argv[1]
cmd = argv[2]
args = argv[3:]
for i in range(len(args)):
if args[i][:2] == '0x':
args[i] = int(args[i][2:], 16)
with UVK5(port) as s:
version = s.get_version()
if cmd == 'version':
print('FW Version:', version)
exit(0)
res = getattr(s, cmd)(*args)
if res:
print(res)