mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-16 19:38:09 +00:00
190 lines
5.9 KiB
Python
190 lines
5.9 KiB
Python
# This file is part of the TREZOR project.
|
|
#
|
|
# Copyright (C) 2012-2016 Marek Palatinus <slush@satoshilabs.com>
|
|
# Copyright (C) 2012-2016 Pavol Rusnak <stick@satoshilabs.com>
|
|
#
|
|
# This library is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# 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 GNU Lesser General Public License
|
|
# along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from __future__ import absolute_import
|
|
|
|
import time
|
|
import os
|
|
import atexit
|
|
import usb1
|
|
|
|
from .protocol_v1 import ProtocolV1
|
|
from .protocol_v2 import ProtocolV2
|
|
from .transport import Transport, TransportException
|
|
|
|
DEV_TREZOR1 = (0x534c, 0x0001)
|
|
DEV_TREZOR2 = (0x1209, 0x53c1)
|
|
DEV_TREZOR2_BL = (0x1209, 0x53c0)
|
|
|
|
INTERFACE = 0
|
|
ENDPOINT = 1
|
|
DEBUG_INTERFACE = 1
|
|
DEBUG_ENDPOINT = 2
|
|
|
|
|
|
class WebUsbHandle(object):
|
|
|
|
def __init__(self, device):
|
|
self.device = device
|
|
self.count = 0
|
|
self.handle = None
|
|
|
|
def open(self, interface):
|
|
if self.count == 0:
|
|
self.handle = self.device.open()
|
|
if self.handle is None:
|
|
raise Exception('Cannot open device')
|
|
self.handle.claimInterface(interface)
|
|
self.count += 1
|
|
|
|
def close(self, interface):
|
|
if self.count == 1:
|
|
self.handle.releaseInterface(interface)
|
|
self.handle.close()
|
|
if self.count > 0:
|
|
self.count -= 1
|
|
|
|
|
|
class WebUsbTransport(Transport):
|
|
'''
|
|
WebUsbTransport implements transport over WebUSB interface.
|
|
'''
|
|
|
|
PATH_PREFIX = 'webusb'
|
|
context = None
|
|
|
|
def __init__(self, device, protocol=None, handle=None, debug=False):
|
|
super(WebUsbTransport, self).__init__()
|
|
|
|
if handle is None:
|
|
handle = WebUsbHandle(device)
|
|
|
|
if protocol is None:
|
|
# force_v1 = os.environ.get('TREZOR_TRANSPORT_V1', '0')
|
|
force_v1 = True
|
|
|
|
if is_trezor2(device) and not int(force_v1):
|
|
protocol = ProtocolV2()
|
|
else:
|
|
protocol = ProtocolV1()
|
|
|
|
self.device = device
|
|
self.protocol = protocol
|
|
self.handle = handle
|
|
self.debug = debug
|
|
|
|
def __str__(self):
|
|
return self.get_path()
|
|
|
|
def get_path(self):
|
|
return "%s:%s" % (self.PATH_PREFIX, dev_to_str(self.device))
|
|
|
|
@classmethod
|
|
def enumerate(cls):
|
|
if cls.context is None:
|
|
cls.context = usb1.USBContext()
|
|
cls.context.open()
|
|
atexit.register(cls.context.close)
|
|
devices = []
|
|
for dev in cls.context.getDeviceIterator(skip_on_error=True):
|
|
if not (is_trezor1(dev) or is_trezor2(dev) or is_trezor2_bl(dev)):
|
|
continue
|
|
if not is_vendor_class(dev):
|
|
continue
|
|
devices.append(WebUsbTransport(dev))
|
|
return devices
|
|
|
|
@classmethod
|
|
def find_by_path(cls, path):
|
|
path = path.replace('%s:' % cls.PATH_PREFIX, '') # Remove prefix from __str__()
|
|
for transport in WebUsbTransport.enumerate():
|
|
if path is None or dev_to_str(transport.device) == path:
|
|
return transport
|
|
raise TransportException('WebUSB device not found')
|
|
|
|
def find_debug(self):
|
|
if isinstance(self.protocol, ProtocolV2):
|
|
# TODO test this
|
|
# For v2 protocol, lets use the same WebUSB interface, but with a different session
|
|
protocol = ProtocolV2()
|
|
debug = WebUsbTransport(self.device, protocol, self.handle)
|
|
return debug
|
|
if isinstance(self.protocol, ProtocolV1):
|
|
# For v1 protocol, find debug USB interface for the same serial number
|
|
protocol = ProtocolV1()
|
|
debug = WebUsbTransport(self.device, protocol, None, True)
|
|
return debug
|
|
raise TransportException('Debug WebUSB device not found')
|
|
|
|
def open(self):
|
|
interface = DEBUG_INTERFACE if self.debug else INTERFACE
|
|
self.handle.open(interface)
|
|
self.protocol.session_begin(self)
|
|
|
|
def close(self):
|
|
interface = DEBUG_INTERFACE if self.debug else INTERFACE
|
|
self.protocol.session_end(self)
|
|
self.handle.close(interface)
|
|
|
|
def read(self):
|
|
return self.protocol.read(self)
|
|
|
|
def write(self, msg):
|
|
return self.protocol.write(self, msg)
|
|
|
|
def write_chunk(self, chunk):
|
|
endpoint = DEBUG_ENDPOINT if self.debug else ENDPOINT
|
|
if len(chunk) != 64:
|
|
raise TransportException('Unexpected chunk size: %d' % len(chunk))
|
|
self.handle.handle.interruptWrite(endpoint, chunk)
|
|
|
|
def read_chunk(self):
|
|
endpoint = DEBUG_ENDPOINT if self.debug else ENDPOINT
|
|
endpoint = 0x80 | endpoint
|
|
while True:
|
|
chunk = self.handle.handle.interruptRead(endpoint, 64)
|
|
if chunk:
|
|
break
|
|
else:
|
|
time.sleep(0.001)
|
|
if len(chunk) != 64:
|
|
raise TransportException('Unexpected chunk size: %d' % len(chunk))
|
|
return bytearray(chunk)
|
|
|
|
|
|
def is_trezor1(dev):
|
|
return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR1
|
|
|
|
|
|
def is_trezor2(dev):
|
|
return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR2
|
|
|
|
|
|
def is_trezor2_bl(dev):
|
|
return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR2_BL
|
|
|
|
|
|
def is_vendor_class(dev):
|
|
configurationId = 0
|
|
altSettingId = 0
|
|
return dev[configurationId][INTERFACE][altSettingId].getClass() == usb1.libusb1.LIBUSB_CLASS_VENDOR_SPEC
|
|
|
|
|
|
def dev_to_str(dev):
|
|
return ':'.join(str(x) for x in ['%03i' % (dev.getBusNumber(), )] + dev.getPortNumberList())
|