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102 lines
3.7 KiB
Python
102 lines
3.7 KiB
Python
"""Thin wrapper around trezor/keepkey libraries."""
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from __future__ import absolute_import
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import binascii
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import collections
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import logging
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import semver
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log = logging.getLogger(__name__)
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ClientWrapper = collections.namedtuple(
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'ClientWrapper',
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['connection', 'identity_type', 'device_name', 'call_exception'])
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# pylint: disable=too-many-arguments
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def _load_client(name, client_type, hid_transport,
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passphrase_ack, identity_type,
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required_version, call_exception):
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def empty_passphrase_handler(_):
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return passphrase_ack(passphrase='')
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for d in hid_transport.enumerate():
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connection = client_type(hid_transport(d))
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connection.callback_PassphraseRequest = empty_passphrase_handler
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f = connection.features
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log.debug('connected to %s %s', name, f.device_id)
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log.debug('label : %s', f.label)
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log.debug('vendor : %s', f.vendor)
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current_version = '{}.{}.{}'.format(f.major_version,
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f.minor_version,
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f.patch_version)
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log.debug('version : %s', current_version)
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log.debug('revision : %s', binascii.hexlify(f.revision))
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if not semver.match(current_version, required_version):
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fmt = 'Please upgrade your {} firmware to {} version (current: {})'
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raise ValueError(fmt.format(name,
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required_version,
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current_version))
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yield ClientWrapper(connection=connection,
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identity_type=identity_type,
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device_name=name,
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call_exception=call_exception)
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def _load_trezor():
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try:
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from trezorlib.client import TrezorClient, CallException
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from trezorlib.transport_hid import HidTransport
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from trezorlib.messages_pb2 import PassphraseAck
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from trezorlib.types_pb2 import IdentityType
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return _load_client(name='Trezor',
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client_type=TrezorClient,
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hid_transport=HidTransport,
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passphrase_ack=PassphraseAck,
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identity_type=IdentityType,
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required_version='>=1.4.0',
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call_exception=CallException)
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except ImportError:
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log.exception('Missing module: install via "pip install trezor"')
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def _load_keepkey():
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try:
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from keepkeylib.client import KeepKeyClient, CallException
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from keepkeylib.transport_hid import HidTransport
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from keepkeylib.messages_pb2 import PassphraseAck
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from keepkeylib.types_pb2 import IdentityType
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return _load_client(name='KeepKey',
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client_type=KeepKeyClient,
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hid_transport=HidTransport,
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passphrase_ack=PassphraseAck,
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identity_type=IdentityType,
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required_version='>=1.0.4',
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call_exception=CallException)
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except ImportError:
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log.exception('Missing module: install via "pip install keepkey"')
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LOADERS = [
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_load_trezor,
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_load_keepkey
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]
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def load(loaders=None):
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"""Load a single device, via specified loaders' list."""
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loaders = loaders if loaders is not None else LOADERS
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device_list = []
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for loader in loaders:
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device = loader()
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if device:
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device_list.extend(device)
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break # stop polling if we found the device...
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if len(device_list) == 1: # ...especialy when we need exactly one
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return device_list[0]
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msg = '{:d} devices found'.format(len(device_list))
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raise IOError(msg)
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