82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
"""TREZOR-related definitions."""
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# pylint: disable=unused-import,import-error
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import os
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import logging
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import mnemonic
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import semver
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import trezorlib
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log = logging.getLogger(__name__)
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if semver.match(trezorlib.__version__, ">=0.11.0"):
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from trezorlib.client import TrezorClient as Client
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from trezorlib.exceptions import TrezorFailure, PinException
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from trezorlib.transport import get_transport
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from trezorlib.messages import IdentityType
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from trezorlib.btc import get_public_node
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from trezorlib.misc import sign_identity, get_ecdh_session_key
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else:
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from trezorlib.client import (TrezorClient, CallException as TrezorFailure,
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PinException)
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from trezorlib.messages import IdentityType
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from trezorlib import messages
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from trezorlib.transport import get_transport
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get_public_node = TrezorClient.get_public_node
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sign_identity = TrezorClient.sign_identity
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get_ecdh_session_key = TrezorClient.get_ecdh_session_key
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class Client(TrezorClient):
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def __init__(self, transport, ui, state=None):
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super().__init__(transport, state=state)
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self.ui = ui
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def callback_PinMatrixRequest(self, msg):
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try:
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pin = self.ui.get_pin(msg.type)
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if not pin.isdigit():
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raise PinException(
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None, 'Invalid scrambled PIN: {!r}'.format(pin))
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return messages.PinMatrixAck(pin=pin)
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except: # noqa
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self.init_device()
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raise
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def callback_PassphraseRequest(self, msg):
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try:
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if msg.on_device is True:
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return messages.PassphraseAck()
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passphrase = self.ui.get_passphrase()
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passphrase = mnemonic.Mnemonic.normalize_string(passphrase)
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length = len(passphrase)
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if length > 50:
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msg = 'Too long passphrase ({} chars)'.format(length)
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raise ValueError(msg)
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return messages.PassphraseAck(passphrase=passphrase)
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except: # noqa
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self.init_device()
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raise
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def callback_PassphraseStateRequest(self, msg):
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self.state = msg.state
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return messages.PassphraseStateAck()
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def find_device():
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"""Selects a transport based on `TREZOR_PATH` environment variable.
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If unset, picks first connected device.
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"""
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try:
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return get_transport(os.environ.get("TREZOR_PATH"))
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except Exception as e: # pylint: disable=broad-except
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log.debug("Failed to find a Trezor device: %s", e)
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