mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 07:58:09 +00:00
403 lines
14 KiB
Python
403 lines
14 KiB
Python
# This file is part of the Trezor project.
|
|
#
|
|
# Copyright (C) 2012-2019 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 sys
|
|
import warnings
|
|
from types import SimpleNamespace
|
|
|
|
from mnemonic import Mnemonic
|
|
|
|
from . import MINIMUM_FIRMWARE_VERSION, exceptions, messages, tools
|
|
|
|
if sys.version_info.major < 3:
|
|
raise Exception("Trezorlib does not support Python 2 anymore.")
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
VENDORS = ("bitcointrezor.com", "trezor.io")
|
|
MAX_PASSPHRASE_LENGTH = 50
|
|
|
|
DEPRECATION_ERROR = """
|
|
Incompatible Trezor library detected.
|
|
|
|
(Original error: {})
|
|
""".strip()
|
|
|
|
OUTDATED_FIRMWARE_ERROR = """
|
|
Your Trezor firmware is out of date. Update it with the following command:
|
|
trezorctl firmware-update
|
|
Or visit https://wallet.trezor.io/
|
|
""".strip()
|
|
|
|
|
|
def _no_ui_selected(*args, **kwargs):
|
|
raise RuntimeError(
|
|
"You did not supply a UI object. You were warned that this would crash soon. "
|
|
"That's what happened now.\n "
|
|
"You need to supply a UI object to TrezorClient constructor."
|
|
)
|
|
|
|
|
|
_NO_UI_OBJECT = SimpleNamespace(
|
|
button_request=_no_ui_selected,
|
|
get_passphrase=_no_ui_selected,
|
|
get_pin=_no_ui_selected,
|
|
)
|
|
|
|
|
|
def get_buttonrequest_value(code):
|
|
# Converts integer code to its string representation of ButtonRequestType
|
|
return [
|
|
k
|
|
for k in dir(messages.ButtonRequestType)
|
|
if getattr(messages.ButtonRequestType, k) == code
|
|
][0]
|
|
|
|
|
|
def get_default_client(path=None, ui=None, **kwargs):
|
|
"""Get a client for a connected Trezor device.
|
|
|
|
Returns a TrezorClient instance with minimum fuss.
|
|
|
|
If no path is specified, finds first connected Trezor. Otherwise performs
|
|
a prefix-search for the specified device. If no UI is supplied, instantiates
|
|
the default CLI UI.
|
|
"""
|
|
from .transport import get_transport
|
|
from .ui import ClickUI
|
|
|
|
transport = get_transport(path, prefix_search=True)
|
|
if ui is None:
|
|
ui = ClickUI()
|
|
|
|
return TrezorClient(transport, ui, **kwargs)
|
|
|
|
|
|
class TrezorClient:
|
|
"""Trezor client, a connection to a Trezor device.
|
|
|
|
This class allows you to manage connection state, send and receive protobuf
|
|
messages, handle user interactions, and perform some generic tasks
|
|
(send a cancel message, initialize or clear a session, ping the device).
|
|
|
|
You have to provide a transport, i.e., a raw connection to the device. You can use
|
|
`trezorlib.transport.get_transport` to find one.
|
|
|
|
You have to provide an UI implementation for the three kinds of interaction:
|
|
- button request (notify the user that their interaction is needed)
|
|
- PIN request (on T1, ask the user to input numbers for a PIN matrix)
|
|
- passphrase request (ask the user to enter a passphrase)
|
|
See `trezorlib.ui` for details.
|
|
|
|
You can supply a `state` you saved in the previous session. If you do,
|
|
the user might not need to enter their passphrase again.
|
|
"""
|
|
|
|
def __init__(self, transport, ui=_NO_UI_OBJECT, state=None):
|
|
LOG.info("creating client instance for device: {}".format(transport.get_path()))
|
|
self.transport = transport
|
|
self.ui = ui
|
|
self.state = state
|
|
|
|
# XXX remove when old Electrum has been cycled out.
|
|
# explanation: We changed the API in 0.11 and this broke older versions
|
|
# of Electrum (incl. all its forks). We want to display an intelligent error
|
|
# message instead of crashing for no reason (see DEPRECATION_ERROR and MovedTo),
|
|
# so we are not allowed to crash in constructor.
|
|
# I'd keep this until, say, end of 2019 (or version 0.12), and then drop
|
|
# the default value for `ui` argument and all related functionality.
|
|
if ui is _NO_UI_OBJECT:
|
|
warnings.warn("UI object not supplied. This will probably crash soon.")
|
|
|
|
self.session_counter = 0
|
|
self.init_device()
|
|
|
|
def open(self):
|
|
if self.session_counter == 0:
|
|
self.transport.begin_session()
|
|
self.session_counter += 1
|
|
|
|
def close(self):
|
|
if self.session_counter == 1:
|
|
self.transport.end_session()
|
|
self.session_counter -= 1
|
|
|
|
def cancel(self):
|
|
self._raw_write(messages.Cancel())
|
|
|
|
def call_raw(self, msg):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
self._raw_write(msg)
|
|
return self._raw_read()
|
|
|
|
def _raw_write(self, msg):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
self.transport.write(msg)
|
|
|
|
def _raw_read(self):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
return self.transport.read()
|
|
|
|
def _callback_pin(self, msg):
|
|
try:
|
|
pin = self.ui.get_pin(msg.type)
|
|
except exceptions.Cancelled:
|
|
self.call_raw(messages.Cancel())
|
|
raise
|
|
|
|
if not pin.isdigit():
|
|
self.call_raw(messages.Cancel())
|
|
raise ValueError("Non-numeric PIN provided")
|
|
|
|
resp = self.call_raw(messages.PinMatrixAck(pin=pin))
|
|
if isinstance(resp, messages.Failure) and resp.code in (
|
|
messages.FailureType.PinInvalid,
|
|
messages.FailureType.PinCancelled,
|
|
messages.FailureType.PinExpected,
|
|
):
|
|
raise exceptions.PinException(resp.code, resp.message)
|
|
else:
|
|
return resp
|
|
|
|
def _callback_passphrase(self, msg):
|
|
if msg.on_device:
|
|
passphrase = None
|
|
else:
|
|
try:
|
|
passphrase = self.ui.get_passphrase()
|
|
except exceptions.Cancelled:
|
|
self.call_raw(messages.Cancel())
|
|
raise
|
|
|
|
passphrase = Mnemonic.normalize_string(passphrase)
|
|
if len(passphrase) > MAX_PASSPHRASE_LENGTH:
|
|
self.call_raw(messages.Cancel())
|
|
raise ValueError("Passphrase too long")
|
|
|
|
resp = self.call_raw(
|
|
messages.PassphraseAck(passphrase=passphrase, state=self.state)
|
|
)
|
|
if isinstance(resp, messages.PassphraseStateRequest):
|
|
# TODO report to the user that the passphrase has changed?
|
|
self.state = resp.state
|
|
return self.call_raw(messages.PassphraseStateAck())
|
|
else:
|
|
return resp
|
|
|
|
def _callback_button(self, msg):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
# do this raw - send ButtonAck first, notify UI later
|
|
self._raw_write(messages.ButtonAck())
|
|
self.ui.button_request(msg.code)
|
|
return self._raw_read()
|
|
|
|
@tools.session
|
|
def call(self, msg):
|
|
self.check_firmware_version()
|
|
resp = self.call_raw(msg)
|
|
while True:
|
|
if isinstance(resp, messages.PinMatrixRequest):
|
|
resp = self._callback_pin(resp)
|
|
elif isinstance(resp, messages.PassphraseRequest):
|
|
resp = self._callback_passphrase(resp)
|
|
elif isinstance(resp, messages.ButtonRequest):
|
|
resp = self._callback_button(resp)
|
|
elif isinstance(resp, messages.Failure):
|
|
if resp.code == messages.FailureType.ActionCancelled:
|
|
raise exceptions.Cancelled
|
|
raise exceptions.TrezorFailure(resp)
|
|
else:
|
|
return resp
|
|
|
|
@tools.session
|
|
def init_device(self):
|
|
resp = self.call_raw(messages.Initialize(state=self.state))
|
|
if not isinstance(resp, messages.Features):
|
|
raise exceptions.TrezorException("Unexpected initial response")
|
|
else:
|
|
self.features = resp
|
|
if self.features.vendor not in VENDORS:
|
|
raise RuntimeError("Unsupported device")
|
|
# A side-effect of this is a sanity check for broken protobuf definitions.
|
|
# If the `vendor` field doesn't exist, you probably have a mismatched
|
|
# checkout of trezor-common.
|
|
self.version = (
|
|
self.features.major_version,
|
|
self.features.minor_version,
|
|
self.features.patch_version,
|
|
)
|
|
self.check_firmware_version(warn_only=True)
|
|
|
|
def is_outdated(self):
|
|
if self.features.bootloader_mode:
|
|
return False
|
|
model = self.features.model or "1"
|
|
required_version = MINIMUM_FIRMWARE_VERSION[model]
|
|
return self.version < required_version
|
|
|
|
def check_firmware_version(self, warn_only=False):
|
|
if self.is_outdated():
|
|
if warn_only:
|
|
warnings.warn(OUTDATED_FIRMWARE_ERROR, stacklevel=2)
|
|
else:
|
|
raise exceptions.OutdatedFirmwareError(OUTDATED_FIRMWARE_ERROR)
|
|
|
|
@tools.expect(messages.Success, field="message")
|
|
def ping(
|
|
self,
|
|
msg,
|
|
button_protection=False,
|
|
pin_protection=False,
|
|
passphrase_protection=False,
|
|
):
|
|
# We would like ping to work on any valid TrezorClient instance, but
|
|
# due to the protection modes, we need to go through self.call, and that will
|
|
# raise an exception if the firmware is too old.
|
|
# So we short-circuit the simplest variant of ping with call_raw.
|
|
if not button_protection and not pin_protection and not passphrase_protection:
|
|
# XXX this should be: `with self:`
|
|
try:
|
|
self.open()
|
|
return self.call_raw(messages.Ping(message=msg))
|
|
finally:
|
|
self.close()
|
|
|
|
msg = messages.Ping(
|
|
message=msg,
|
|
button_protection=button_protection,
|
|
pin_protection=pin_protection,
|
|
passphrase_protection=passphrase_protection,
|
|
)
|
|
return self.call(msg)
|
|
|
|
def get_device_id(self):
|
|
return self.features.device_id
|
|
|
|
@tools.expect(messages.Success, field="message")
|
|
@tools.session
|
|
def clear_session(self):
|
|
return self.call_raw(messages.ClearSession())
|
|
|
|
|
|
def MovedTo(where):
|
|
def moved_to(*args, **kwargs):
|
|
msg = "Function has been moved to " + where
|
|
raise RuntimeError(DEPRECATION_ERROR.format(msg))
|
|
|
|
return moved_to
|
|
|
|
|
|
class ProtocolMixin(object):
|
|
"""Fake mixin for old-style software that constructed TrezorClient class
|
|
from separate mixins.
|
|
|
|
Now it only simulates existence of original attributes to prevent some early
|
|
crashes, and raises errors when any of the attributes are actually called.
|
|
"""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
warnings.warn("TrezorClient mixins are not supported anymore")
|
|
self.tx_api = None # Electrum checks that this attribute exists
|
|
super().__init__(*args, **kwargs)
|
|
|
|
def set_tx_api(self, tx_api):
|
|
warnings.warn("set_tx_api is deprecated, use new arguments to sign_tx")
|
|
|
|
@staticmethod
|
|
def expand_path(n):
|
|
warnings.warn(
|
|
"expand_path is deprecated, use tools.parse_path",
|
|
DeprecationWarning,
|
|
stacklevel=2,
|
|
)
|
|
return tools.parse_path(n)
|
|
|
|
# Device functionality
|
|
wipe_device = MovedTo("device.wipe")
|
|
recovery_device = MovedTo("device.recover")
|
|
reset_device = MovedTo("device.reset")
|
|
backup_device = MovedTo("device.backup")
|
|
|
|
set_u2f_counter = MovedTo("device.set_u2f_counter")
|
|
|
|
apply_settings = MovedTo("device.apply_settings")
|
|
apply_flags = MovedTo("device.apply_flags")
|
|
change_pin = MovedTo("device.change_pin")
|
|
|
|
# Firmware functionality
|
|
firmware_update = MovedTo("firmware.update")
|
|
|
|
# BTC-like functionality
|
|
get_public_node = MovedTo("btc.get_public_node")
|
|
get_address = MovedTo("btc.get_address")
|
|
sign_tx = MovedTo("btc.sign_tx")
|
|
sign_message = MovedTo("btc.sign_message")
|
|
verify_message = MovedTo("btc.verify_message")
|
|
|
|
# CoSi functionality
|
|
cosi_commit = MovedTo("cosi.commit")
|
|
cosi_sign = MovedTo("cosi.sign")
|
|
|
|
# Ethereum functionality
|
|
ethereum_get_address = MovedTo("ethereum.get_address")
|
|
ethereum_sign_tx = MovedTo("ethereum.sign_tx")
|
|
ethereum_sign_message = MovedTo("ethereum.sign_message")
|
|
ethereum_verify_message = MovedTo("ethereum.verify_message")
|
|
|
|
# Lisk functionality
|
|
lisk_get_address = MovedTo("lisk.get_address")
|
|
lisk_get_public_key = MovedTo("lisk.get_public_key")
|
|
lisk_sign_message = MovedTo("lisk.sign_message")
|
|
lisk_verify_message = MovedTo("lisk.verify_message")
|
|
lisk_sign_tx = MovedTo("lisk.sign_tx")
|
|
|
|
# NEM functionality
|
|
nem_get_address = MovedTo("nem.get_address")
|
|
nem_sign_tx = MovedTo("nem.sign_tx")
|
|
|
|
# Stellar functionality
|
|
stellar_get_address = MovedTo("stellar.get_address")
|
|
stellar_sign_transaction = MovedTo("stellar.sign_tx")
|
|
|
|
# Miscellaneous cryptographic functionality
|
|
get_entropy = MovedTo("misc.get_entropy")
|
|
sign_identity = MovedTo("misc.sign_identity")
|
|
get_ecdh_session_key = MovedTo("misc.get_ecdh_session_key")
|
|
encrypt_keyvalue = MovedTo("misc.encrypt_keyvalue")
|
|
decrypt_keyvalue = MovedTo("misc.decrypt_keyvalue")
|
|
|
|
# Debug device functionality
|
|
load_device_by_mnemonic = MovedTo("debuglink.load_device_by_mnemonic")
|
|
load_device_by_xprv = MovedTo("debuglink.load_device_by_xprv")
|
|
|
|
|
|
class BaseClient:
|
|
"""Compatibility proxy for original BaseClient class.
|
|
Prevents early crash in Electrum forks and possibly other software.
|
|
"""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
warnings.warn("TrezorClient mixins are not supported anymore")
|
|
self.trezor_client = TrezorClient(*args, **kwargs)
|
|
|
|
def __getattr__(self, key):
|
|
return getattr(self.trezor_client, key)
|
|
|
|
|
|
# further Electrum compatibility
|
|
proto = None
|