mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
ef46bd38ef
move all methods that are still relevant to TrezorClient (originally BaseClient) modify ProtocolMixin to be a compatibility shim modify BaseClient to be a compatibility shim with a proxy to original actual TrezorClient - this prevents early failures in Electrum for long enough to show an error message
302 lines
9.6 KiB
Python
302 lines
9.6 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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import functools
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import logging
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import sys
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import warnings
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from . import (
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btc,
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cosi,
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device,
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ethereum,
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exceptions,
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firmware,
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lisk,
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mapping,
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messages as proto,
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misc,
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nem,
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stellar,
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tools,
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)
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if sys.version_info.major < 3:
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raise Exception("Trezorlib does not support Python 2 anymore.")
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SCREENSHOT = False
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LOG = logging.getLogger(__name__)
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PinException = exceptions.PinException
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def get_buttonrequest_value(code):
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# Converts integer code to its string representation of ButtonRequestType
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return [
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k
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for k in dir(proto.ButtonRequestType)
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if getattr(proto.ButtonRequestType, k) == code
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][0]
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class MovedTo:
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"""Deprecation redirector for methods that were formerly part of TrezorClient"""
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def __init__(self, where):
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self.where = where
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self.name = where.__module__ + "." + where.__name__
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def _deprecated_redirect(self, client, *args, **kwargs):
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"""Redirector for a deprecated method on TrezorClient"""
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warnings.warn(
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"Function has been moved to %s" % self.name,
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DeprecationWarning,
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stacklevel=2,
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)
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return self.where(client, *args, **kwargs)
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def __get__(self, instance, cls):
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if instance is None:
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return self._deprecated_redirect
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else:
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return functools.partial(self._deprecated_redirect, instance)
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class TrezorClient:
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VENDORS = ("bitcointrezor.com", "trezor.io")
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# Implements very basic layer of sending raw protobuf
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# messages to device and getting its response back.
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def __init__(self, transport, ui=None, state=None):
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LOG.info("creating client instance for device: {}".format(transport.get_path()))
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self.transport = transport
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self.ui = ui
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self.state = state
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if ui is None:
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warnings.warn("UI class not supplied. This will probably crash soon.")
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self.session_counter = 0
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self.init_device()
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def open(self):
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if self.session_counter == 0:
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self.transport.begin_session()
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self.session_counter += 1
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def close(self):
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if self.session_counter == 1:
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self.transport.end_session()
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self.session_counter -= 1
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def cancel(self):
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self._raw_write(proto.Cancel())
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def call_raw(self, msg):
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__tracebackhide__ = True # for pytest # pylint: disable=W0612
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self._raw_write(msg)
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return self._raw_read()
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def _raw_write(self, msg):
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__tracebackhide__ = True # for pytest # pylint: disable=W0612
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self.transport.write(msg)
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def _raw_read(self):
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__tracebackhide__ = True # for pytest # pylint: disable=W0612
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return self.transport.read()
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def _callback_pin(self, msg):
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pin = self.ui.get_pin(msg.type)
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if not pin.isdigit():
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raise ValueError("Non-numeric PIN provided")
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resp = self.call_raw(proto.PinMatrixAck(pin=pin))
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if isinstance(resp, proto.Failure) and resp.code in (
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proto.FailureType.PinInvalid,
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proto.FailureType.PinCancelled,
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proto.FailureType.PinExpected,
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):
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raise exceptions.PinException(resp.code, resp.message)
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else:
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return resp
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def _callback_passphrase(self, msg):
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if msg.on_device:
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passphrase = None
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else:
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passphrase = self.ui.get_passphrase()
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resp = self.call_raw(proto.PassphraseAck(passphrase=passphrase))
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if isinstance(resp, proto.PassphraseStateRequest):
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self.state = resp.state
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return self.call_raw(proto.PassphraseStateAck())
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else:
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return resp
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def _callback_button(self, msg):
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__tracebackhide__ = True # for pytest # pylint: disable=W0612
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# do this raw - send ButtonAck first, notify UI later
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self._raw_write(proto.ButtonAck())
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self.ui.button_request(msg.code)
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return self._raw_read()
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@tools.session
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def call(self, msg):
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resp = self.call_raw(msg)
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while True:
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if isinstance(resp, proto.PinMatrixRequest):
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resp = self._callback_pin(resp)
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elif isinstance(resp, proto.PassphraseRequest):
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resp = self._callback_passphrase(resp)
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elif isinstance(resp, proto.ButtonRequest):
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resp = self._callback_button(resp)
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elif isinstance(resp, proto.Failure):
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if resp.code == proto.FailureType.ActionCancelled:
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raise exceptions.Cancelled
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raise exceptions.TrezorFailure(resp)
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else:
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return resp
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@tools.session
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def init_device(self):
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resp = self.call_raw(proto.Initialize(state=self.state))
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if not isinstance(resp, proto.Features):
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raise exceptions.TrezorException("Unexpected initial response")
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else:
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self.features = resp
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if self.features.vendor not in self.VENDORS:
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raise RuntimeError("Unsupported device")
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# A side-effect of this is a sanity check for broken protobuf definitions.
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# If the `vendor` field doesn't exist, you probably have a mismatched
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# checkout of trezor-common.
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@tools.expect(proto.Success, field="message")
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def ping(
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self,
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msg,
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button_protection=False,
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pin_protection=False,
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passphrase_protection=False,
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):
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msg = proto.Ping(
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message=msg,
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button_protection=button_protection,
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pin_protection=pin_protection,
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passphrase_protection=passphrase_protection,
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)
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return self.call(msg)
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def get_device_id(self):
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return self.features.device_id
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@tools.expect(proto.Success, field="message")
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def clear_session(self):
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return self.call_raw(proto.ClearSession())
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class ProtocolMixin(object):
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"""Fake mixin for old-style software that constructed TrezorClient class
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from separate mixins.
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Now it only simulates existence of original attributes to prevent some early
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crashes, and raises errors when any of the attributes are actually called.
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"""
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def __init__(self, *args, **kwargs):
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warnings.warn("TrezorClient mixins are not supported anymore")
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self.tx_api = None # Electrum checks that this attribute exists
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super().__init__(*args, **kwargs)
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def set_tx_api(self, tx_api):
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warnings.warn("set_tx_api is deprecated, use new arguments to sign_tx")
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@staticmethod
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def expand_path(n):
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warnings.warn(
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"expand_path is deprecated, use tools.parse_path",
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DeprecationWarning,
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stacklevel=2,
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)
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return tools.parse_path(n)
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# Device functionality
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wipe_device = MovedTo(device.wipe)
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recovery_device = MovedTo(device.recover)
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reset_device = MovedTo(device.reset)
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backup_device = MovedTo(device.backup)
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set_u2f_counter = MovedTo(device.set_u2f_counter)
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apply_settings = MovedTo(device.apply_settings)
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apply_flags = MovedTo(device.apply_flags)
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change_pin = MovedTo(device.change_pin)
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# Firmware functionality
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firmware_update = MovedTo(firmware.update)
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# BTC-like functionality
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get_public_node = MovedTo(btc.get_public_node)
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get_address = MovedTo(btc.get_address)
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sign_tx = MovedTo(btc.sign_tx)
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sign_message = MovedTo(btc.sign_message)
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verify_message = MovedTo(btc.verify_message)
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# CoSi functionality
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cosi_commit = MovedTo(cosi.commit)
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cosi_sign = MovedTo(cosi.sign)
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# Ethereum functionality
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ethereum_get_address = MovedTo(ethereum.get_address)
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ethereum_sign_tx = MovedTo(ethereum.sign_tx)
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ethereum_sign_message = MovedTo(ethereum.sign_message)
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ethereum_verify_message = MovedTo(ethereum.verify_message)
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# Lisk functionality
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lisk_get_address = MovedTo(lisk.get_address)
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lisk_get_public_key = MovedTo(lisk.get_public_key)
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lisk_sign_message = MovedTo(lisk.sign_message)
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lisk_verify_message = MovedTo(lisk.verify_message)
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lisk_sign_tx = MovedTo(lisk.sign_tx)
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# NEM functionality
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nem_get_address = MovedTo(nem.get_address)
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nem_sign_tx = MovedTo(nem.sign_tx)
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# Stellar functionality
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stellar_get_address = MovedTo(stellar.get_address)
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stellar_sign_transaction = MovedTo(stellar.sign_tx)
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# Miscellaneous cryptographic functionality
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get_entropy = MovedTo(misc.get_entropy)
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sign_identity = MovedTo(misc.sign_identity)
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get_ecdh_session_key = MovedTo(misc.get_ecdh_session_key)
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encrypt_keyvalue = MovedTo(misc.encrypt_keyvalue)
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decrypt_keyvalue = MovedTo(misc.decrypt_keyvalue)
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class BaseClient:
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"""Compatibility proxy for original BaseClient class.
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Prevents early crash in Electrum forks and possibly other software.
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"""
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def __init__(self, *args, **kwargs):
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warnings.warn("TrezorClient mixins are not supported anymore")
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self.trezor_client = TrezorClient(*args, **kwargs)
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def __getattr__(self, key):
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return getattr(self.trezor_client, key)
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