Karel Bilek
6 years ago
committed by
Pavol Rusnak
parent
7b844f0379
commit
759316e96f
@ -0,0 +1,177 @@
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# This file is part of the TREZOR project.
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#
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# Copyright (C) 2012-2016 Marek Palatinus <slush@satoshilabs.com>
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# Copyright (C) 2012-2016 Pavol Rusnak <stick@satoshilabs.com>
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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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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from __future__ import absolute_import
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import time
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import usb1
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import os
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from .protocol_v1 import ProtocolV1
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from .protocol_v2 import ProtocolV2
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from .transport import Transport, TransportException
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DEV_TREZOR1 = (0x534c, 0x0001)
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DEV_TREZOR2 = (0x1209, 0x53c1)
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DEV_TREZOR2_BL = (0x1209, 0x53c0)
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INTERFACE = 0
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ENDPOINT = 1
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DEBUG_INTERFACE = 1
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DEBUG_ENDPOINT = 2
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context = usb1.USBContext()
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context.open()
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import atexit
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def exit_handler():
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context.close()
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atexit.register(exit_handler)
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class WebUsbHandle(object):
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def __init__(self, device):
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self.device = device
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self.count = 0
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self.handle = None
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def open(self, interface):
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if self.count == 0:
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self.handle = self.device.open()
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if self.handle is None:
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raise Exception('Cannot open device')
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self.handle.claimInterface(interface)
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self.count += 1
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def close(self, interface):
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if self.count == 1:
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self.handle.releaseInterface(interface)
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self.handle.close()
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if self.count > 0:
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self.count -= 1
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class WebUsbTransport(Transport):
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'''
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HidTransport implements transport over USB HID interface.
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'''
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def __init__(self, device, protocol=None, handle=None, debug=False):
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super(WebUsbTransport, self).__init__()
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if handle is None:
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handle = WebUsbHandle(device)
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if protocol is None:
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force_v1 = os.environ.get('TREZOR_TRANSPORT_V1', '0')
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if is_trezor2(device) and not int(force_v1):
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protocol = ProtocolV2()
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else:
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protocol = ProtocolV1()
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self.device = device
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self.protocol = protocol
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self.handle = handle
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self.debug = debug
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def __str__(self):
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return dev_to_str(self.device)
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@staticmethod
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def enumerate():
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devices = []
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for dev in context.getDeviceIterator(skip_on_error=True):
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if not (is_trezor1(dev) or is_trezor2(dev) or is_trezor2_bl(dev)):
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continue
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devices.append(WebUsbTransport(dev))
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return devices
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@staticmethod
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def find_by_path(path=None):
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for transport in WebUsbTransport.enumerate():
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if path is None or dev_to_str(transport.device) == path:
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return transport
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raise TransportException('HID device not found')
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def find_debug(self):
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if isinstance(self.protocol, ProtocolV2):
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# TODO test this
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# For v2 protocol, lets use the same HID interface, but with a different session
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protocol = ProtocolV2()
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debug = WebUsbTransport(self.device, protocol, self.handle)
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return debug
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if isinstance(self.protocol, ProtocolV1):
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# For v1 protocol, find debug USB interface for the same serial number
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protocol = ProtocolV1()
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debug = WebUsbTransport(self.device, protocol, None, True)
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return debug
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raise TransportException('Debug HID device not found')
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def open(self):
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interface = DEBUG_INTERFACE if self.debug else INTERFACE
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self.handle.open(interface)
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self.protocol.session_begin(self)
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def close(self):
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interface = DEBUG_INTERFACE if self.debug else INTERFACE
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self.protocol.session_end(self)
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self.handle.close(interface)
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def read(self):
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return self.protocol.read(self)
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def write(self, msg):
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return self.protocol.write(self, msg)
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def write_chunk(self, chunk):
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endpoint = DEBUG_ENDPOINT if self.debug else ENDPOINT
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if len(chunk) != 64:
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raise TransportException('Unexpected chunk size: %d' % len(chunk))
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self.handle.handle.interruptWrite(endpoint, chunk)
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def read_chunk(self):
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endpoint = DEBUG_ENDPOINT if self.debug else ENDPOINT
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endpoint = 0x80 | endpoint
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while True:
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chunk = self.handle.handle.interruptRead(endpoint, 64)
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if chunk:
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break
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else:
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time.sleep(0.001)
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if len(chunk) != 64:
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raise TransportException('Unexpected chunk size: %d' % len(chunk))
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return bytearray(chunk)
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def is_trezor1(dev):
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return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR1
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def is_trezor2(dev):
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return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR2
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def is_trezor2_bl(dev):
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return (dev.getVendorID(), dev.getProductID()) == DEV_TREZOR2_BL
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def dev_to_str(dev):
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return ':'.join(str(x) for x in ['%03i' % (dev.getBusNumber(), )] + dev.getPortNumberList())
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