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November 10, 2021 18:48
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Minimalistic Python implementation of Ledger Live HID proxy
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from ledgerblue.comm import getDongle, CommException | |
import asyncio | |
import websockets | |
import json | |
import binascii | |
dongle = None | |
async def hidProxy(websocket, path): | |
global dongle | |
while True: | |
data = await websocket.recv() | |
print("Processing " + data) | |
response = {} | |
if data == "open": | |
response['type'] = "opened" | |
await websocket.send(json.dumps(response)) | |
continue | |
if dongle == None: | |
dongle = getDongle(True) | |
apduResponse = None | |
sw = None | |
try: | |
apduResponse = dongle.exchange(binascii.unhexlify(data)) | |
except CommException as e: | |
sw = e.sw | |
except Exception: | |
try: | |
dongle.close() | |
except: | |
pass | |
dongle = None | |
try: | |
dongle = getDongle(True) | |
apduResponse = dongle.exchange(binascii.unhexlify(data)) | |
except: | |
pass | |
if sw != None: | |
response['type'] = "response" | |
response['data'] = "%0.4X" % sw | |
else: | |
if apduResponse != None: | |
response['type'] = "response" | |
response['data'] = binascii.hexlify(apduResponse).decode('utf-8') + "9000" | |
else: | |
response['type'] = "error" | |
response['data'] = "Failed to exchange APDU" | |
await websocket.send(json.dumps(response)) | |
print("Running websocket server") | |
server = websockets.serve(hidProxy, "localhost", 8435) | |
asyncio.get_event_loop().run_until_complete(server) | |
asyncio.get_event_loop().run_forever() |
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