111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
# 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 os
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import time
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from .protocol_v1 import ProtocolV1
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from .transport import Transport, TransportException
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class PipeTransport(Transport):
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'''
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PipeTransport implements fake wire transport over local named pipe.
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Use this transport for talking with trezor-emu.
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'''
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def __init__(self, device=None, is_device=False):
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super(PipeTransport, self).__init__()
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if not device:
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device = '/tmp/pipe.trezor'
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self.device = device
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self.is_device = is_device
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self.filename_read = None
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self.filename_write = None
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self.read_f = None
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self.write_f = None
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self.protocol = ProtocolV1()
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def __str__(self):
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return self.device
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@staticmethod
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def enumerate():
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raise NotImplementedError('This transport cannot enumerate devices')
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@staticmethod
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def find_by_path(path=None):
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return PipeTransport(path)
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def open(self):
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if self.is_device:
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self.filename_read = self.device + '.to'
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self.filename_write = self.device + '.from'
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os.mkfifo(self.filename_read, 0o600)
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os.mkfifo(self.filename_write, 0o600)
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else:
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self.filename_read = self.device + '.from'
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self.filename_write = self.device + '.to'
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if not os.path.exists(self.filename_write):
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raise TransportException('Not connected')
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self.read_f = os.open(self.filename_read, 'rb', 0)
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self.write_f = os.open(self.filename_write, 'w+b', 0)
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self.protocol.session_begin(self)
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def close(self):
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self.protocol.session_end(self)
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if self.read_f:
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self.read_f.close()
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self.read_f = None
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if self.write_f:
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self.write_f.close()
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self.write_f = None
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if self.is_device:
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os.unlink(self.filename_read)
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os.unlink(self.filename_write)
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self.filename_read = None
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self.filename_write = None
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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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if len(chunk) != 64:
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raise TransportException('Unexpected chunk size: %d' % len(chunk))
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self.write_f.write(chunk)
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self.write_f.flush()
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def read_chunk(self):
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while True:
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chunk = self.read_f.read(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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