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trezor-firmware/python/tools/pybridge.py

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#!/usr/bin/env python3
# ### INSTRUCTIONS FOR USE ####
#
# 1. install Python 3.7 and up
# 2. make sure you have `pip3` command available
# 3. from command line, run the following:
# pip3 install trezor[hidapi] gevent bottle
# 4. (ONLY for TT or T1 >= 1.8.0) Make sure you have libusb available.
# 4a. on Windows, download:
# https://github.com/libusb/libusb/releases/download/v1.0.26/libusb-1.0.26-binaries.7z
# Extract file VS2015-x64/dll/libusb-1.0.dll and place it in your working directory.
# 4b. on MacOS, assuming you have Homebrew, run `brew install libusb`
# Otherwise download the above, extract the file macos_<best version>/lib/libusb.1.0.0.dylib
# and place it in your working directory.
# 4c. on Linux, use your package manager to install `libusb` or `libusb-1.0` package.
# (but on Linux you most likely already have it)
# 4. Shut down Trezor Suite (and bridge if you are running it separately
# 5. Disconnect and then reconnect your Trezor.
# 6. Run the following command from the command line:
# python3 pybridge.py
# 7. Start Suite again, or use any other Trezor-compatible software.
# 8. Output of pybridge goes to console and also to file `pybridge.log`
from __future__ import annotations
from gevent import monkey
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import trezorlib.transport
monkey.patch_all()
import json
import logging
import struct
import time
import typing as t
import click
from bottle import post, request, response, run
import trezorlib.mapping
import trezorlib.models
import trezorlib.transport
from trezorlib.client import TrezorClient
from trezorlib.protobuf import format_message
from trezorlib.transport.bridge import BridgeTransport
from trezorlib.ui import TrezorClientUI
# ignore bridge. we are the bridge
BridgeTransport.ENABLED = False
logging.basicConfig(
level=logging.DEBUG,
format="%(asctime)s %(levelname)s %(message)s",
handlers=[
logging.FileHandler("pybridge.log"),
logging.StreamHandler(),
],
)
LOG = logging.getLogger()
class SilentUI(TrezorClientUI):
def get_pin(self, _code: t.Any) -> str:
return ""
def get_passphrase(self) -> str:
return ""
def button_request(self, _br: t.Any) -> None:
pass
class Session:
SESSION_COUNTER = 0
SESSIONS: dict[str, Session] = {}
def __init__(self, transport: Transport) -> None:
self.id = self._new_id()
self.transport = transport
self.SESSIONS[self.id] = self
def release(self) -> None:
self.SESSIONS.pop(self.id, None)
self.transport.release()
@classmethod
def find(cls, sid: str) -> Session | None:
return cls.SESSIONS.get(sid)
@classmethod
def _new_id(cls) -> str:
id = str(cls.SESSION_COUNTER)
cls.SESSION_COUNTER += 1
return id
class Transport:
TRANSPORT_COUNTER = 0
TRANSPORTS: dict[str, Transport] = {}
def __init__(self, transport: trezorlib.transport.Transport) -> None:
self.path = transport.get_path()
self.session: Session | None = None
self.transport = transport
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client = TrezorClient(transport) # TODO add silent UI?
self.model = (
trezorlib.models.by_name(client.features.model) or trezorlib.models.TREZOR_T
)
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# TODO client.end_session()
def acquire(self, sid: str) -> str:
if self.session_id() != sid:
raise Exception("Session mismatch")
if self.session is not None:
self.session.release()
self.session = Session(self)
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# TODO self.transport.deprecated_begin_session()
return self.session.id
def release(self) -> None:
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# TODO self.transport.deprecated_end_session()
self.session = None
def session_id(self) -> str | None:
if self.session is not None:
return self.session.id
else:
return None
def to_json(self) -> dict:
vid, pid = next(iter(self.model.usb_ids), (0, 0))
return {
"debug": False,
"debugSession": None,
"path": self.path,
"product": pid,
"vendor": vid,
"session": self.session_id(),
}
def write(self, msg_id: int, data: bytes) -> None:
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raise NotImplementedError
# TODO
# self.transport.write(msg_id, data)
def read(self) -> tuple[int, bytes]:
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raise NotImplementedError
# TODO
# return self.transport.read()
@classmethod
def find(cls, path: str) -> Transport | None:
return cls.TRANSPORTS.get(path)
@classmethod
def enumerate(cls) -> t.Iterable[Transport]:
transports = {t.get_path(): t for t in trezorlib.transport.enumerate_devices()}
for path in transports:
if path not in cls.TRANSPORTS:
cls.TRANSPORTS[path] = Transport(transports[path])
for path in list(cls.TRANSPORTS):
if path not in transports:
cls.TRANSPORTS.pop(path, None)
return cls.TRANSPORTS.values()
FILTERS: dict[int, t.Callable[[int, bytes], tuple[int, bytes]]] = {}
def log_message(prefix: str, msg_id: int, data: bytes) -> None:
try:
msg = trezorlib.mapping.DEFAULT_MAPPING.decode(msg_id, data)
LOG.info("=== %s: [%s] %s", prefix, msg_id, format_message(msg))
except Exception:
LOG.info("=== %s: [%s] undecoded bytes %s", prefix, msg_id, data.hex())
def decode_data(hex_data: str) -> tuple[int, bytes]:
data = bytes.fromhex(hex_data)
headerlen = struct.calcsize(">HL")
msg_type, datalen = struct.unpack(">HL", data[:headerlen])
return msg_type, data[headerlen : headerlen + datalen]
def encode_data(msg_type: int, msg_data: bytes) -> str:
data = struct.pack(">HL", msg_type, len(msg_data)) + msg_data
return data.hex()
def check_origin() -> None:
response.set_header("Access-Control-Allow-Origin", "*")
@post("/") # type: ignore [Untyped function decorator]
def index():
check_origin()
return {"version": "2.0.27"}
@post("/configure") # type: ignore [Untyped function decorator]
def do_configure():
return index()
@post("/enumerate") # type: ignore [Untyped function decorator]
def do_enumerate():
check_origin()
trezor_json = [transport.to_json() for transport in Transport.enumerate()]
return json.dumps(trezor_json)
@post("/acquire/<path>/<sid>") # type: ignore [Untyped function decorator]
def do_acquire(path: str, sid: str):
check_origin()
if sid == "null":
sid = None # type: ignore [is incompatible with declared type]
trezor = Transport.find(path)
if trezor is None:
response.status = 404
return {"error": "invalid path"}
try:
return {"session": trezor.acquire(sid)}
except Exception:
response.status = 400
return {"error": "wrong previous session"}
@post("/release/<sid>") # type: ignore [Untyped function decorator]
def do_release(sid: str):
check_origin()
session = Session.find(sid)
if session is None:
response.status = 404
return {"error": "invalid session"}
session.release()
return {"session": sid}
@post("/call/<sid>") # type: ignore [Untyped function decorator]
def do_call(sid: str):
check_origin()
session = Session.find(sid)
if session is None:
response.status = 404
return {"error": "invalid session"}
msg_type, msg_data = decode_data(request.body.read().decode())
if msg_type in FILTERS:
msg_type, msg_data = FILTERS[msg_type](msg_type, msg_data)
log_message("CALLING", msg_type, msg_data)
session.transport.write(msg_type, msg_data)
resp_type, resp_data = session.transport.read()
if resp_type in FILTERS:
resp_type, resp_data = FILTERS[resp_type](resp_type, resp_data)
log_message("RESPONSE", resp_type, resp_data)
return encode_data(resp_type, resp_data)
@post("/post/<sid>") # type: ignore [Untyped function decorator]
def do_post(sid: str):
check_origin()
session = Session.find(sid)
if session is None:
response.status = 404
return {"error": "invalid session"}
msg_type, msg_data = decode_data(request.body.read().decode())
session.transport.write(msg_type, msg_data)
return {"session": sid}
@post("/read/<sid>") # type: ignore [Untyped function decorator]
def do_read(sid: str):
check_origin()
session = Session.find(sid)
if session is None:
response.status = 404
return {"error": "invalid session"}
resp_type, resp_data = session.transport.read()
print("=== RESPONSE:")
msg = trezorlib.mapping.DEFAULT_MAPPING.decode(resp_type, resp_data)
print(format_message(msg))
return encode_data(resp_type, resp_data)
@post("/listen") # type: ignore [Untyped function decorator]
def do_listen():
check_origin()
try:
data = json.load(request.body)
except Exception:
response.status = 400
return {"error": "invalid json"}
for _ in range(10):
trezor_json = [transport.to_json() for transport in Transport.enumerate()]
if trezor_json != data:
# `yield` turns the function into a generator which allows gevent to
# run it in a greenlet, so that the time.sleep() call doesn't block
yield json.dumps(trezor_json)
return
time.sleep(1)
# def example_filter(msg_id: int, data: bytes) -> tuple[int, bytes]:
# msg = trezorlib.mapping.DEFAULT_MAPPING.decode(msg_id, data)
# assert isinstance(msg, messages.Features)
# msg.model = "Example"
# return trezorlib.mapping.DEFAULT_MAPPING.encode(msg)
# FILTERS[messages.Features.MESSAGE_WIRE_TYPE] = example_filter
@click.command()
@click.argument("port", type=int, default=21325)
def main(port: int) -> None:
run(host="127.0.0.1", port=port, server="gevent")
if __name__ == "__main__":
main()