mirror of
https://github.com/trezor/trezor-firmware.git
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523 lines
18 KiB
Python
523 lines
18 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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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 version 3
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# as published by the Free Software Foundation.
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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 License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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import functools
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import logging
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import os
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import sys
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import time
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import binascii
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import getpass
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import warnings
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from mnemonic import Mnemonic
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from . import messages as proto
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from . import btc, cosi, device, ethereum, firmware, lisk, misc, nem, stellar
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from . import mapping
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from . import tools
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from . import debuglink
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if sys.version_info.major < 3:
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raise Exception("Trezorlib does not support Python 2 anymore.")
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SCREENSHOT = False
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LOG = logging.getLogger(__name__)
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# make a getch function
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try:
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import termios
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import tty
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# POSIX system. Create and return a getch that manipulates the tty.
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# On Windows, termios will fail to import.
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def getch():
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fd = sys.stdin.fileno()
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old_settings = termios.tcgetattr(fd)
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try:
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tty.setraw(fd)
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ch = sys.stdin.read(1)
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finally:
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termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
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return ch
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except ImportError:
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# Windows system.
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# Use msvcrt's getch function.
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import msvcrt
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def getch():
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while True:
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key = msvcrt.getch()
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if key in (0x00, 0xe0):
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# skip special keys: read the scancode and repeat
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msvcrt.getch()
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continue
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return key.decode('latin1')
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def get_buttonrequest_value(code):
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# Converts integer code to its string representation of ButtonRequestType
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return [k for k in dir(proto.ButtonRequestType) if getattr(proto.ButtonRequestType, k) == code][0]
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class PinException(tools.CallException):
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pass
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class MovedTo:
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"""Deprecation redirector for methods that were formerly part of TrezorClient"""
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def __init__(self, where):
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self.where = where
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self.name = where.__module__ + '.' + where.__name__
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def _deprecated_redirect(self, client, *args, **kwargs):
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"""Redirector for a deprecated method on TrezorClient"""
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warnings.warn("Function has been moved to %s" % self.name, DeprecationWarning, stacklevel=2)
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return self.where(client, *args, **kwargs)
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def __get__(self, instance, cls):
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if instance is None:
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return self._deprecated_redirect
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else:
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return functools.partial(self._deprecated_redirect, instance)
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class BaseClient(object):
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# Implements very basic layer of sending raw protobuf
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# messages to device and getting its response back.
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def __init__(self, transport, **kwargs):
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LOG.info("creating client instance for device: {}".format(transport.get_path()))
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self.transport = transport
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super(BaseClient, self).__init__() # *args, **kwargs)
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def close(self):
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pass
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def cancel(self):
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self.transport.write(proto.Cancel())
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@tools.session
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def call_raw(self, msg):
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__tracebackhide__ = True # pytest traceback hiding - this function won't appear in tracebacks
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self.transport.write(msg)
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return self.transport.read()
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@tools.session
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def call(self, msg):
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resp = self.call_raw(msg)
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handler_name = "callback_%s" % resp.__class__.__name__
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handler = getattr(self, handler_name, None)
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if handler is not None:
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msg = handler(resp)
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if msg is None:
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raise ValueError("Callback %s must return protobuf message, not None" % handler)
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resp = self.call(msg)
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return resp
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def callback_Failure(self, msg):
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if msg.code in (proto.FailureType.PinInvalid,
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proto.FailureType.PinCancelled, proto.FailureType.PinExpected):
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raise PinException(msg.code, msg.message)
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raise tools.CallException(msg.code, msg.message)
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def register_message(self, msg):
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'''Allow application to register custom protobuf message type'''
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mapping.register_message(msg)
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class TextUIMixin(object):
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# This class demonstrates easy test-based UI
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# integration between the device and wallet.
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# You can implement similar functionality
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# by implementing your own GuiMixin with
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# graphical widgets for every type of these callbacks.
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def __init__(self, *args, **kwargs):
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super(TextUIMixin, self).__init__(*args, **kwargs)
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@staticmethod
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def print(text):
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print(text, file=sys.stderr)
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def callback_ButtonRequest(self, msg):
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# log("Sending ButtonAck for %s " % get_buttonrequest_value(msg.code))
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return proto.ButtonAck()
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def callback_RecoveryMatrix(self, msg):
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if self.recovery_matrix_first_pass:
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self.recovery_matrix_first_pass = False
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self.print("Use the numeric keypad to describe positions. For the word list use only left and right keys.")
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self.print("Use backspace to correct an entry. The keypad layout is:")
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self.print(" 7 8 9 7 | 9")
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self.print(" 4 5 6 4 | 6")
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self.print(" 1 2 3 1 | 3")
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while True:
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character = getch()
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if character in ('\x03', '\x04'):
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return proto.Cancel()
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if character in ('\x08', '\x7f'):
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return proto.WordAck(word='\x08')
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# ignore middle column if only 6 keys requested.
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if msg.type == proto.WordRequestType.Matrix6 and character in ('2', '5', '8'):
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continue
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if character.isdigit():
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return proto.WordAck(word=character)
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def callback_PinMatrixRequest(self, msg):
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if msg.type == proto.PinMatrixRequestType.Current:
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desc = 'current PIN'
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elif msg.type == proto.PinMatrixRequestType.NewFirst:
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desc = 'new PIN'
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elif msg.type == proto.PinMatrixRequestType.NewSecond:
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desc = 'new PIN again'
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else:
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desc = 'PIN'
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self.print("Use the numeric keypad to describe number positions. The layout is:")
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self.print(" 7 8 9")
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self.print(" 4 5 6")
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self.print(" 1 2 3")
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self.print("Please enter %s: " % desc)
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pin = getpass.getpass('')
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if not pin.isdigit():
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raise ValueError('Non-numerical PIN provided')
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return proto.PinMatrixAck(pin=pin)
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def callback_PassphraseRequest(self, msg):
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if msg.on_device is True:
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return proto.PassphraseAck()
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if os.getenv("PASSPHRASE") is not None:
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self.print("Passphrase required. Using PASSPHRASE environment variable.")
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passphrase = Mnemonic.normalize_string(os.getenv("PASSPHRASE"))
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return proto.PassphraseAck(passphrase=passphrase)
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self.print("Passphrase required: ")
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passphrase = getpass.getpass('')
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self.print("Confirm your Passphrase: ")
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if passphrase == getpass.getpass(''):
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passphrase = Mnemonic.normalize_string(passphrase)
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return proto.PassphraseAck(passphrase=passphrase)
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else:
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self.print("Passphrase did not match! ")
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exit()
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def callback_PassphraseStateRequest(self, msg):
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return proto.PassphraseStateAck()
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def callback_WordRequest(self, msg):
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if msg.type in (proto.WordRequestType.Matrix9,
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proto.WordRequestType.Matrix6):
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return self.callback_RecoveryMatrix(msg)
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self.print("Enter one word of mnemonic: ")
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word = input()
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if self.expand:
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word = self.mnemonic_wordlist.expand_word(word)
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return proto.WordAck(word=word)
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class DebugLinkMixin(object):
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# This class implements automatic responses
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# and other functionality for unit tests
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# for various callbacks, created in order
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# to automatically pass unit tests.
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#
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# This mixing should be used only for purposes
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# of unit testing, because it will fail to work
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# without special DebugLink interface provided
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# by the device.
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DEBUG = LOG.getChild('debug_link').debug
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def __init__(self, *args, **kwargs):
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super(DebugLinkMixin, self).__init__(*args, **kwargs)
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self.debug = None
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self.in_with_statement = 0
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self.button_wait = 0
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self.screenshot_id = 0
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# Always press Yes and provide correct pin
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self.setup_debuglink(True, True)
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# Do not expect any specific response from device
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self.expected_responses = None
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# Use blank passphrase
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self.set_passphrase('')
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def close(self):
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super(DebugLinkMixin, self).close()
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if self.debug:
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self.debug.close()
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def set_debuglink(self, debug_transport):
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self.debug = debuglink.DebugLink(debug_transport)
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def set_buttonwait(self, secs):
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self.button_wait = secs
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def __enter__(self):
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# For usage in with/expected_responses
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self.in_with_statement += 1
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return self
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def __exit__(self, _type, value, traceback):
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self.in_with_statement -= 1
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if _type is not None:
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# Another exception raised
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return False
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# return isinstance(value, TypeError)
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# Evaluate missed responses in 'with' statement
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if self.expected_responses is not None and len(self.expected_responses):
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raise RuntimeError("Some of expected responses didn't come from device: %s" %
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[repr(x) for x in self.expected_responses])
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# Cleanup
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self.expected_responses = None
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return False
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def set_expected_responses(self, expected):
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if not self.in_with_statement:
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raise RuntimeError("Must be called inside 'with' statement")
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self.expected_responses = expected
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def setup_debuglink(self, button, pin_correct):
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self.button = button # True -> YES button, False -> NO button
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self.pin_correct = pin_correct
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def set_passphrase(self, passphrase):
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self.passphrase = Mnemonic.normalize_string(passphrase)
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def set_mnemonic(self, mnemonic):
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self.mnemonic = Mnemonic.normalize_string(mnemonic).split(' ')
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def call_raw(self, msg):
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__tracebackhide__ = True # pytest traceback hiding - this function won't appear in tracebacks
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if SCREENSHOT and self.debug:
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from PIL import Image
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layout = self.debug.read_layout()
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im = Image.new("RGB", (128, 64))
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pix = im.load()
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for x in range(128):
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for y in range(64):
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rx, ry = 127 - x, 63 - y
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if (ord(layout[rx + (ry / 8) * 128]) & (1 << (ry % 8))) > 0:
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pix[x, y] = (255, 255, 255)
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im.save('scr%05d.png' % self.screenshot_id)
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self.screenshot_id += 1
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resp = super(DebugLinkMixin, self).call_raw(msg)
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self._check_request(resp)
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return resp
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def _check_request(self, msg):
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__tracebackhide__ = True # pytest traceback hiding - this function won't appear in tracebacks
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if self.expected_responses is not None:
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try:
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expected = self.expected_responses.pop(0)
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except IndexError:
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raise AssertionError(proto.FailureType.UnexpectedMessage,
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"Got %s, but no message has been expected" % repr(msg))
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if msg.__class__ != expected.__class__:
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raise AssertionError(proto.FailureType.UnexpectedMessage,
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"Expected %s, got %s" % (repr(expected), repr(msg)))
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for field, value in expected.__dict__.items():
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if value is None or value == []:
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continue
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if getattr(msg, field) != value:
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raise AssertionError(proto.FailureType.UnexpectedMessage,
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"Expected %s, got %s" % (repr(expected), repr(msg)))
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def callback_ButtonRequest(self, msg):
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self.DEBUG("ButtonRequest code: " + get_buttonrequest_value(msg.code))
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self.DEBUG("Pressing button " + str(self.button))
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if self.button_wait:
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self.DEBUG("Waiting %d seconds " % self.button_wait)
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time.sleep(self.button_wait)
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self.debug.press_button(self.button)
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return proto.ButtonAck()
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def callback_PinMatrixRequest(self, msg):
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if self.pin_correct:
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pin = self.debug.read_pin_encoded()
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else:
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pin = '444222'
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return proto.PinMatrixAck(pin=pin)
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def callback_PassphraseRequest(self, msg):
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self.DEBUG("Provided passphrase: '%s'" % self.passphrase)
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return proto.PassphraseAck(passphrase=self.passphrase)
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def callback_PassphraseStateRequest(self, msg):
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return proto.PassphraseStateAck()
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def callback_WordRequest(self, msg):
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(word, pos) = self.debug.read_recovery_word()
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if word != '':
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return proto.WordAck(word=word)
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if pos != 0:
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return proto.WordAck(word=self.mnemonic[pos - 1])
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raise RuntimeError("Unexpected call")
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class ProtocolMixin(object):
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VENDORS = ('bitcointrezor.com', 'trezor.io')
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def __init__(self, state=None, *args, **kwargs):
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super(ProtocolMixin, self).__init__(*args, **kwargs)
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self.state = state
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self.init_device()
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self.tx_api = None
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def set_tx_api(self, tx_api):
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self.tx_api = tx_api
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def init_device(self):
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init_msg = proto.Initialize()
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if self.state is not None:
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init_msg.state = self.state
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self.features = tools.expect(proto.Features)(self.call)(init_msg)
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if str(self.features.vendor) not in self.VENDORS:
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raise RuntimeError("Unsupported device")
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@staticmethod
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def expand_path(n):
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warnings.warn('expand_path is deprecated, use tools.parse_path', DeprecationWarning, stacklevel=2)
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return tools.parse_path(n)
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@tools.expect(proto.Success, field="message")
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def ping(self, msg, button_protection=False, pin_protection=False, passphrase_protection=False):
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msg = proto.Ping(message=msg,
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button_protection=button_protection,
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pin_protection=pin_protection,
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passphrase_protection=passphrase_protection)
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return self.call(msg)
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def get_device_id(self):
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return self.features.device_id
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def _prepare_sign_tx(self, inputs, outputs):
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tx = proto.TransactionType()
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tx.inputs = inputs
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tx.outputs = outputs
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txes = {None: tx}
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for inp in inputs:
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if inp.prev_hash in txes:
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continue
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if inp.script_type in (proto.InputScriptType.SPENDP2SHWITNESS,
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proto.InputScriptType.SPENDWITNESS):
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continue
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if not self.tx_api:
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raise RuntimeError('TX_API not defined')
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prev_tx = self.tx_api.get_tx(binascii.hexlify(inp.prev_hash).decode('utf-8'))
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txes[inp.prev_hash] = prev_tx
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return txes
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@tools.expect(proto.Success, field="message")
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def clear_session(self):
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return self.call(proto.ClearSession())
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# Device functionality
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wipe_device = MovedTo(device.wipe)
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recovery_device = MovedTo(device.recover)
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reset_device = MovedTo(device.reset)
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backup_device = MovedTo(device.backup)
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# debugging
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load_device_by_mnemonic = MovedTo(debuglink.load_device_by_mnemonic)
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load_device_by_xprv = MovedTo(debuglink.load_device_by_xprv)
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self_test = MovedTo(debuglink.self_test)
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set_u2f_counter = MovedTo(device.set_u2f_counter)
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apply_settings = MovedTo(device.apply_settings)
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apply_flags = MovedTo(device.apply_flags)
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change_pin = MovedTo(device.change_pin)
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# Firmware functionality
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firmware_update = MovedTo(firmware.update)
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# BTC-like functionality
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get_public_node = MovedTo(btc.get_public_node)
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get_address = MovedTo(btc.get_address)
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sign_tx = MovedTo(btc.sign_tx)
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sign_message = MovedTo(btc.sign_message)
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verify_message = MovedTo(btc.verify_message)
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# CoSi functionality
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cosi_commit = MovedTo(cosi.commit)
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cosi_sign = MovedTo(cosi.sign)
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# Ethereum functionality
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ethereum_get_address = MovedTo(ethereum.get_address)
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ethereum_sign_tx = MovedTo(ethereum.sign_tx)
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ethereum_sign_message = MovedTo(ethereum.sign_message)
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ethereum_verify_message = MovedTo(ethereum.verify_message)
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# Lisk functionality
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lisk_get_address = MovedTo(lisk.get_address)
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lisk_get_public_key = MovedTo(lisk.get_public_key)
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lisk_sign_message = MovedTo(lisk.sign_message)
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lisk_verify_message = MovedTo(lisk.verify_message)
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lisk_sign_tx = MovedTo(lisk.sign_tx)
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# NEM functionality
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nem_get_address = MovedTo(nem.get_address)
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nem_sign_tx = MovedTo(nem.sign_tx)
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# Stellar functionality
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stellar_get_public_key = MovedTo(stellar.get_public_key)
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stellar_get_address = MovedTo(stellar.get_address)
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stellar_sign_transaction = MovedTo(stellar.sign_tx)
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# Miscellaneous cryptographic functionality
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get_entropy = MovedTo(misc.get_entropy)
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sign_identity = MovedTo(misc.sign_identity)
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|
get_ecdh_session_key = MovedTo(misc.get_ecdh_session_key)
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|
encrypt_keyvalue = MovedTo(misc.encrypt_keyvalue)
|
|
decrypt_keyvalue = MovedTo(misc.decrypt_keyvalue)
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class TrezorClient(ProtocolMixin, TextUIMixin, BaseClient):
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|
def __init__(self, transport, *args, **kwargs):
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|
super().__init__(transport=transport, *args, **kwargs)
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|
|
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|
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class TrezorClientDebugLink(ProtocolMixin, DebugLinkMixin, BaseClient):
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|
def __init__(self, transport, *args, **kwargs):
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|
super().__init__(transport=transport, *args, **kwargs)
|