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@ -17,6 +17,13 @@
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library. If not, see <http://www.gnu.org/licenses/>.
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import importlib
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import logging
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from typing import Iterable, Type, List, Set
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LOG = logging.getLogger(__name__)
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class TransportException(Exception):
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pass
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@ -63,54 +70,52 @@ class Transport(object):
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raise TransportException('{} device not found: {}'.format(cls.PATH_PREFIX, path))
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def all_transports():
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transports = []
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try:
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from .bridge import BridgeTransport
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transports.append(BridgeTransport)
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except:
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pass
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try:
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from .hid import HidTransport
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transports.append(HidTransport)
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except:
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pass
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try:
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from .udp import UdpTransport
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transports.append(UdpTransport)
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except:
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pass
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try:
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from .webusb import WebUsbTransport
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transports.append(WebUsbTransport)
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except:
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pass
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def all_transports() -> Iterable[Type[Transport]]:
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transports = set() # type: Set[Type[Transport]]
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for modname in ("bridge", "hid", "udp", "webusb"):
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try:
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# Import the module and find the Transport class.
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# To avoid iterating over every item, the module should assign its Transport class
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# to a constant named TRANSPORT.
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module = importlib.import_module("." + modname, __name__)
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try:
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transports.add(getattr(module, "TRANSPORT"))
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except AttributeError:
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LOG.warning("Skipping broken module {}".format(modname))
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except ImportError as e:
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LOG.info("Failed to import module {}: {}".format(modname, e))
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return transports
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def enumerate_devices():
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return [device
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for transport in all_transports()
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for device in transport.enumerate()]
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def enumerate_devices() -> Iterable[Transport]:
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devices = [] # type: List[Transport]
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for transport in all_transports():
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try:
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found = transport.enumerate()
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LOG.info("Enumerating {}: found {} devices".format(transport.__name__, len(found)))
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devices.extend(found)
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except NotImplementedError:
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LOG.error("{} does not implement device enumeration".format(transport.__name__))
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except Exception as e:
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LOG.error("Failed to enumerate {}. {}: {}".format(transport.__name__, e.__class__.__name__, e))
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return devices
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def get_transport(path=None, prefix_search=False):
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def get_transport(path: str = None, prefix_search: bool = False) -> Transport:
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if path is None:
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try:
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return enumerate_devices()[0]
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return next(iter(enumerate_devices()))
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except IndexError:
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raise Exception("No TREZOR device found") from None
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# Find whether B is prefix of A (transport name is part of the path)
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# or A is prefix of B (path is a prefix, or a name, of transport).
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# This naively expects that no two transports have a common prefix.
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def match_prefix(a, b):
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def match_prefix(a: str, b: str) -> bool:
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return a.startswith(b) or b.startswith(a)
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LOG.info("looking for device by {}: {}".format("prefix" if prefix_search else "full path", path))
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transports = [t for t in all_transports() if match_prefix(path, t.PATH_PREFIX)]
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if transports:
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return transports[0].find_by_path(path, prefix_search=prefix_search)
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