You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
4.0 KiB
123 lines
4.0 KiB
# This file is part of the Trezor project.
|
|
#
|
|
# Copyright (C) 2012-2018 SatoshiLabs and contributors
|
|
#
|
|
# This library is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License version 3
|
|
# as published by the Free Software Foundation.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the License along with this library.
|
|
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
|
|
|
|
import logging
|
|
import struct
|
|
from io import BytesIO
|
|
from typing import Any, Dict, Iterable
|
|
|
|
import requests
|
|
|
|
from . import Transport, TransportException
|
|
from .. import mapping, protobuf
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
TREZORD_HOST = "http://127.0.0.1:21325"
|
|
TREZORD_ORIGIN_HEADER = {"Origin": "https://python.trezor.io"}
|
|
|
|
CONNECTION = requests.Session()
|
|
CONNECTION.headers.update(TREZORD_ORIGIN_HEADER)
|
|
|
|
|
|
def call_bridge(uri: str, data=None) -> requests.Response:
|
|
url = TREZORD_HOST + "/" + uri
|
|
r = CONNECTION.post(url, data=data)
|
|
if r.status_code != 200:
|
|
error_str = "trezord: {} failed with code {}: {}".format(
|
|
uri, r.status_code, r.json()["error"]
|
|
)
|
|
raise TransportException(error_str)
|
|
return r
|
|
|
|
|
|
class BridgeTransport(Transport):
|
|
"""
|
|
BridgeTransport implements transport through TREZOR Bridge (aka trezord).
|
|
"""
|
|
|
|
PATH_PREFIX = "bridge"
|
|
|
|
def __init__(self, device: Dict[str, Any]) -> None:
|
|
self.device = device
|
|
self.session = None # type: Optional[str]
|
|
self.request = None # type: Optional[str]
|
|
self.debug = False
|
|
|
|
def get_path(self) -> str:
|
|
return "%s:%s" % (self.PATH_PREFIX, self.device["path"])
|
|
|
|
@classmethod
|
|
def enumerate(cls) -> Iterable["BridgeTransport"]:
|
|
try:
|
|
return [BridgeTransport(dev) for dev in call_bridge("enumerate").json()]
|
|
except Exception:
|
|
return []
|
|
|
|
def _call(self, action: str, data: str = None) -> requests.Response:
|
|
session = self.session or "null"
|
|
uri = action + "/" + str(session)
|
|
return call_bridge(uri, data=data)
|
|
|
|
def begin_session(self) -> None:
|
|
LOG.debug("acquiring session from {}".format(self.session))
|
|
data = self._call("acquire/" + self.device["path"])
|
|
self.session = data.json()["session"]
|
|
LOG.debug("acquired session {}".format(self.session))
|
|
|
|
def end_session(self) -> None:
|
|
LOG.debug("releasing session {}".format(self.session))
|
|
if not self.session:
|
|
return
|
|
self._call("release")
|
|
self.session = None
|
|
|
|
def write(self, msg: protobuf.MessageType) -> None:
|
|
if self.request is not None:
|
|
raise TransportException("Cannot enqueue two requests")
|
|
|
|
LOG.debug(
|
|
"sending message: {}".format(msg.__class__.__name__),
|
|
extra={"protobuf": msg},
|
|
)
|
|
buffer = BytesIO()
|
|
protobuf.dump_message(buffer, msg)
|
|
ser = buffer.getvalue()
|
|
header = struct.pack(">HL", mapping.get_type(msg), len(ser))
|
|
|
|
self.request = (header + ser).hex()
|
|
|
|
def read(self) -> protobuf.MessageType:
|
|
if self.request is None:
|
|
raise TransportException("No request stored")
|
|
|
|
try:
|
|
data = bytes.fromhex(self._call("call", data=self.request).text)
|
|
headerlen = struct.calcsize(">HL")
|
|
msg_type, datalen = struct.unpack(">HL", data[:headerlen])
|
|
buffer = BytesIO(data[headerlen : headerlen + datalen])
|
|
msg = protobuf.load_message(buffer, mapping.get_class(msg_type))
|
|
LOG.debug(
|
|
"received message: {}".format(msg.__class__.__name__),
|
|
extra={"protobuf": msg},
|
|
)
|
|
return msg
|
|
finally:
|
|
self.request = None
|
|
|
|
|
|
TRANSPORT = BridgeTransport
|