mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
768 lines
27 KiB
Python
768 lines
27 KiB
Python
import os
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import time
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import binascii
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import hashlib
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import unicodedata
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import tools
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import messages_pb2 as proto
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import types_pb2 as types
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from trezorlib.debuglink import DebugLink
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from mnemonic import Mnemonic
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# monkeypatching: text formatting of protobuf messages
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tools.monkeypatch_google_protobuf_text_format()
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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, v in types.ButtonRequestType.items() if v == code][0]
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def pprint(msg):
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if isinstance(msg, proto.FirmwareUpload):
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return "<%s> (%d bytes):\n" % (msg.__class__.__name__, msg.ByteSize())
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else:
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return "<%s> (%d bytes):\n%s" % (msg.__class__.__name__, msg.ByteSize(), msg)
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class CallException(Exception):
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def __init__(self, code, message):
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super(CallException, self).__init__()
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self.args = [code, message]
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class PinException(CallException):
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pass
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class field(object):
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# Decorator extracts single value from
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# protobuf object. If the field is not
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# present, raises an exception.
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def __init__(self, field):
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self.field = field
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def __call__(self, f):
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def wrapped_f(*args, **kwargs):
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ret = f(*args, **kwargs)
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ret.HasField(self.field)
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return getattr(ret, self.field)
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return wrapped_f
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class expect(object):
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# Decorator checks if the method
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# returned one of expected protobuf messages
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# or raises an exception
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def __init__(self, *expected):
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self.expected = expected
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def __call__(self, f):
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def wrapped_f(*args, **kwargs):
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ret = f(*args, **kwargs)
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if not isinstance(ret, self.expected):
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raise Exception("Got %s, expected %s" % (ret.__class__, self.expected))
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return ret
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return wrapped_f
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def normalize_nfc(txt):
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# Normalize string to UTF8 NFC for sign_message
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if isinstance(txt, str):
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utxt = txt.decode('utf8')
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elif isinstance(txt, unicode):
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utxt = txt
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else:
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raise Exception("String value expected")
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return unicodedata.normalize('NFC', utxt)
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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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self.transport = transport
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super(BaseClient, self).__init__() # *args, **kwargs)
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def call_raw(self, msg):
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try:
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self.transport.session_begin()
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self.transport.write(msg)
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resp = self.transport.read_blocking()
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finally:
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self.transport.session_end()
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return resp
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def call(self, msg):
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try:
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self.transport.session_begin()
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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 != None:
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msg = handler(resp)
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if msg == None:
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raise Exception("Callback %s must return protobuf message, not None" % handler)
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resp = self.call(msg)
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finally:
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self.transport.session_end()
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return resp
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def callback_Failure(self, msg):
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if msg.code in (types.Failure_PinInvalid,
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types.Failure_PinCancelled, types.Failure_PinExpected):
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raise PinException(msg.code, msg.message)
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raise CallException(msg.code, msg.message)
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def close(self):
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self.transport.close()
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class DebugWireMixin(object):
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def call_raw(self, msg):
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print "SENDING", pprint(msg)
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resp = super(DebugWireMixin, self).call_raw(msg)
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print "RECEIVED", pprint(resp)
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return resp
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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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def callback_ButtonRequest(self, msg):
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print "Sending ButtonAck for %s " % get_buttonrequest_value(msg.code)
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return proto.ButtonAck()
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def callback_PinMatrixRequest(self, msg):
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if msg.type == 1:
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desc = 'old PIN'
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elif msg.type == 2:
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desc = 'new PIN'
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elif msg.type == 3:
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desc = 'new PIN again'
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else:
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desc = 'PIN'
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pin = raw_input("Please enter %s: " % desc)
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return proto.PinMatrixAck(pin=pin)
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def callback_PassphraseRequest(self, msg):
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passphrase = raw_input("Passphrase required: ")
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passphrase = unicode(str(bytearray(passphrase, 'utf-8')), 'utf-8')
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return proto.PassphraseAck(passphrase=passphrase)
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def callback_WordRequest(self, msg):
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word = raw_input("Enter one word of mnemonic: ")
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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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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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# 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(debug_transport)
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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 != 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 != None and len(self.expected_responses):
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raise Exception("Some of expected responses didn't come from device: %s" % \
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[ pprint(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 Exception("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 = unicode(str(bytearray(Mnemonic.normalize_string(passphrase), 'utf-8')), 'utf-8')
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def set_mnemonic(self, mnemonic):
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self.mnemonic = unicode(str(bytearray(Mnemonic.normalize_string(mnemonic), 'utf-8')), 'utf-8').split(' ')
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def call_raw(self, msg):
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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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if self.expected_responses != 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 CallException(types.Failure_Other,
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"Got %s, but no message has been expected" % pprint(msg))
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if msg.__class__ != expected.__class__:
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raise CallException(types.Failure_Other,
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"Expected %s, got %s" % (pprint(expected), pprint(msg)))
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fields = expected.ListFields() # only filled (including extensions)
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for field, value in fields:
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if not msg.HasField(field.name) or getattr(msg, field.name) != value:
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raise CallException(types.Failure_Other,
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"Expected %s, got %s" % (pprint(expected), pprint(msg)))
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def callback_ButtonRequest(self, msg):
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print "ButtonRequest code:", get_buttonrequest_value(msg.code)
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print "Pressing button", self.button
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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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print "Provided passphrase: '%s'" % self.passphrase
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return proto.PassphraseAck(passphrase=self.passphrase)
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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 Exception("Unexpected call")
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class ProtocolMixin(object):
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PRIME_DERIVATION_FLAG = 0x80000000
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def __init__(self, *args, **kwargs):
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super(ProtocolMixin, self).__init__(*args, **kwargs)
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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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self.features = expect(proto.Features)(self.call)(proto.Initialize())
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def _get_local_entropy(self):
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return os.urandom(32)
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def _convert_prime(self, n):
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# Convert minus signs to uint32 with flag
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return [ int(abs(x) | self.PRIME_DERIVATION_FLAG) if x < 0 else x for x in n ]
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def expand_path(self, n):
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# Convert string of bip32 path to list of uint32 integers with prime flags
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# 0/-1/1' -> [0, 0x80000001, 0x80000001]
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if not n:
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return []
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n = n.split('/')
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path = []
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for x in n:
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prime = False
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if x.endswith("'"):
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x = x.replace('\'', '')
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prime = True
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if x.startswith('-'):
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prime = True
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x = abs(int(x))
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if prime:
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x |= self.PRIME_DERIVATION_FLAG
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path.append(x)
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return path
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@field('node')
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@expect(proto.PublicKey)
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def get_public_node(self, n):
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n = self._convert_prime(n)
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return self.call(proto.GetPublicKey(address_n=n))
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@field('address')
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@expect(proto.Address)
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def get_address(self, coin_name, n):
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n = self._convert_prime(n)
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return self.call(proto.GetAddress(address_n=n, coin_name=coin_name))
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@field('entropy')
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@expect(proto.Entropy)
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def get_entropy(self, size):
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return self.call(proto.GetEntropy(size=size))
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@field('message')
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@expect(proto.Success)
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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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@field('message')
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@expect(proto.Success)
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def apply_settings(self, label=None, language=None):
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settings = proto.ApplySettings()
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if label != None:
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settings.label = label
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if language:
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settings.language = language
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out = self.call(settings)
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self.init_device() # Reload Features
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return out
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@field('message')
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@expect(proto.Success)
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def change_pin(self, remove=False):
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ret = self.call(proto.ChangePin(remove=remove))
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self.init_device() # Re-read features
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return ret
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@expect(proto.MessageSignature)
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def sign_message(self, coin_name, n, message):
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n = self._convert_prime(n)
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try:
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# Convert message to UTF8 NFC (seems to be a bitcoin-qt standard)
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message = normalize_nfc(message)
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# Convert message to ASCII stream
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message = str(bytearray(message, 'utf-8'))
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except:
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pass # it was not UTF8 string
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return self.call(proto.SignMessage(coin_name=coin_name, address_n=n, message=message))
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def verify_message(self, address, signature, message):
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try:
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# Convert message to UTF8 NFC (seems to be a bitcoin-qt standard)
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message = normalize_nfc(message)
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# Convert message to ASCII stream
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message = str(bytearray(message, 'utf-8'))
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except:
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pass # it was not UTF8 string
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try:
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resp = self.call(proto.VerifyMessage(address=address, signature=signature, message=message))
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except CallException as e:
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resp = e
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if isinstance(resp, proto.Success):
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return True
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return False
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@field('tx_size')
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@expect(proto.TxSize)
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def estimate_tx_size(self, coin_name, inputs, outputs):
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msg = proto.EstimateTxSize()
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msg.coin_name = coin_name
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msg.inputs_count = len(inputs)
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msg.outputs_count = len(outputs)
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return self.call(msg)
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def _prepare_simple_sign_tx(self, coin_name, inputs, outputs):
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msg = proto.SimpleSignTx()
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msg.coin_name = coin_name
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msg.inputs.extend(inputs)
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msg.outputs.extend(outputs)
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known_hashes = []
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for inp in inputs:
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if inp.prev_hash in known_hashes:
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continue
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tx = msg.transactions.add()
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tx.CopyFrom(self.tx_api.get_tx(binascii.hexlify(inp.prev_hash)))
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known_hashes.append(inp.prev_hash)
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return msg
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@field('serialized_tx')
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@expect(types.TxRequestSerializedType)
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def simple_sign_tx(self, coin_name, inputs, outputs):
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# TODO Deserialize tx and check if inputs/outputs fits
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msg = self._prepare_simple_sign_tx(coin_name, inputs, outputs)
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return self.call(msg).serialized
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def _prepare_sign_tx(self, coin_name, inputs, outputs):
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tx = types.TransactionType()
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tx.inputs.extend(inputs)
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tx.outputs.extend(outputs)
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txes = {}
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txes[''] = tx
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known_hashes = []
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for inp in inputs:
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if inp.prev_hash in known_hashes:
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continue
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txes[inp.prev_hash] = self.tx_api.get_tx(binascii.hexlify(inp.prev_hash))
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known_hashes.append(inp.prev_hash)
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return txes
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def sign_tx(self, coin_name, inputs, outputs):
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# Temporary solution, until streaming is implemented in the firmware
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# return self.simple_sign_tx(coin_name, inputs, outputs)
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start = time.time()
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txes = self._prepare_sign_tx(coin_name, inputs, outputs)
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try:
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self.transport.session_begin()
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# Prepare and send initial message
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tx = proto.SignTx()
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tx.inputs_count = len(inputs)
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tx.outputs_count = len(outputs)
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tx.coin_name = coin_name
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res = self.call(tx)
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# Prepare structure for signatures
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signatures = [None] * len(inputs)
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serialized_tx = ''
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counter = 0
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while True:
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counter += 1
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if isinstance(res, proto.Failure):
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raise CallException("Signing failed")
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if not isinstance(res, proto.TxRequest):
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raise CallException("Unexpected message")
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# If there's some part of signed transaction, let's add it
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if res.HasField('serialized') and res.serialized.HasField('serialized_tx'):
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print "!!! RECEIVED PART OF SERIALIED TX (%d BYTES)" % len(res.serialized.serialized_tx)
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serialized_tx += res.serialized.serialized_tx
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if res.HasField('serialized') and res.serialized.HasField('signature_index'):
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print "!!! SIGNED INPUT", res.serialized.signature_index
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signatures[res.serialized.signature_index] = res.serialized.signature
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if res.request_type == types.TXFINISHED:
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# Device didn't ask for more information, finish workflow
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break
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# Device asked for one more information, let's process it.
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current_tx = txes[res.details.tx_hash]
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if res.request_type == types.TXMETA:
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print "REQUESTING META OF", binascii.hexlify(res.details.tx_hash)
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msg = types.TransactionType()
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msg.version = current_tx.version
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msg.lock_time = current_tx.lock_time
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msg.inputs_count = len(current_tx.inputs)
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if res.details.tx_hash:
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msg.outputs_count = len(current_tx.bin_outputs)
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else:
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msg.outputs_count = len(current_tx.outputs)
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res = self.call(proto.TxAck(tx=msg))
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continue
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elif res.request_type == types.TXINPUT:
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print "REQUESTING INPUT", res.details.request_index, "OF", binascii.hexlify(res.details.tx_hash)
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msg = types.TransactionType()
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msg.inputs.extend([current_tx.inputs[res.details.request_index], ])
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res = self.call(proto.TxAck(tx=msg))
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continue
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elif res.request_type == types.TXOUTPUT:
|
|
print "REQUESTING OUTOUT", res.details.request_index, "OF", binascii.hexlify(res.details.tx_hash)
|
|
msg = types.TransactionType()
|
|
if res.details.tx_hash:
|
|
msg.bin_outputs.extend([current_tx.bin_outputs[res.details.request_index], ])
|
|
else:
|
|
msg.outputs.extend([current_tx.outputs[res.details.request_index], ])
|
|
res = self.call(proto.TxAck(tx=msg))
|
|
continue
|
|
|
|
finally:
|
|
self.transport.session_end()
|
|
|
|
print "SIGNED IN %.03f SECONDS, CALLED %d MESSAGES, %d BYTES" % \
|
|
(time.time() - start, counter, len(serialized_tx))
|
|
|
|
return (signatures, serialized_tx)
|
|
|
|
@field('message')
|
|
@expect(proto.Success)
|
|
def wipe_device(self):
|
|
ret = self.call(proto.WipeDevice())
|
|
self.init_device()
|
|
return ret
|
|
|
|
@field('message')
|
|
@expect(proto.Success)
|
|
def recovery_device(self, word_count, passphrase_protection, pin_protection, label, language):
|
|
if self.features.initialized:
|
|
raise Exception("Device is initialized already. Call wipe_device() and try again.")
|
|
|
|
if word_count not in (12, 18, 24):
|
|
raise Exception("Invalid word count. Use 12/18/24")
|
|
|
|
res = self.call(proto.RecoveryDevice(word_count=int(word_count),
|
|
passphrase_protection=bool(passphrase_protection),
|
|
pin_protection=bool(pin_protection),
|
|
label=label,
|
|
language=language,
|
|
enforce_wordlist=True))
|
|
|
|
self.init_device()
|
|
return res
|
|
|
|
@field('message')
|
|
@expect(proto.Success)
|
|
def reset_device(self, display_random, strength, passphrase_protection, pin_protection, label, language):
|
|
if self.features.initialized:
|
|
raise Exception("Device is initialized already. Call wipe_device() and try again.")
|
|
|
|
# Begin with device reset workflow
|
|
msg = proto.ResetDevice(display_random=display_random,
|
|
strength=strength,
|
|
language=language,
|
|
passphrase_protection=bool(passphrase_protection),
|
|
pin_protection=bool(pin_protection),
|
|
label=label)
|
|
|
|
resp = self.call(msg)
|
|
if not isinstance(resp, proto.EntropyRequest):
|
|
raise Exception("Invalid response, expected EntropyRequest")
|
|
|
|
external_entropy = self._get_local_entropy()
|
|
print "Computer generated entropy:", binascii.hexlify(external_entropy)
|
|
ret = self.call(proto.EntropyAck(entropy=external_entropy))
|
|
self.init_device()
|
|
return ret
|
|
|
|
@field('message')
|
|
@expect(proto.Success)
|
|
def load_device_by_mnemonic(self, mnemonic, pin, passphrase_protection, label, language, skip_checksum=False):
|
|
m = Mnemonic('english')
|
|
if not skip_checksum and not m.check(mnemonic):
|
|
raise Exception("Invalid mnemonic checksum")
|
|
|
|
# Convert mnemonic to UTF8 NKFD
|
|
mnemonic = Mnemonic.normalize_string(mnemonic)
|
|
|
|
# Convert mnemonic to ASCII stream
|
|
mnemonic = unicode(str(bytearray(mnemonic, 'utf-8')), 'utf-8')
|
|
|
|
if self.features.initialized:
|
|
raise Exception("Device is initialized already. Call wipe_device() and try again.")
|
|
|
|
resp = self.call(proto.LoadDevice(mnemonic=mnemonic, pin=pin,
|
|
passphrase_protection=passphrase_protection,
|
|
language=language,
|
|
label=label,
|
|
skip_checksum=skip_checksum))
|
|
self.init_device()
|
|
return resp
|
|
|
|
@field('message')
|
|
@expect(proto.Success)
|
|
def load_device_by_xprv(self, xprv, pin, passphrase_protection, label, language):
|
|
if self.features.initialized:
|
|
raise Exception("Device is initialized already. Call wipe_device() and try again.")
|
|
|
|
if xprv[0:4] not in ('xprv', 'tprv'):
|
|
raise Exception("Unknown type of xprv")
|
|
|
|
if len(xprv) < 100 and len(xprv) > 112:
|
|
raise Exception("Invalid length of xprv")
|
|
|
|
node = types.HDNodeType()
|
|
data = tools.b58decode(xprv, None).encode('hex')
|
|
|
|
if data[90:92] != '00':
|
|
raise Exception("Contain invalid private key")
|
|
|
|
checksum = hashlib.sha256(hashlib.sha256(binascii.unhexlify(data[:156])).digest()).hexdigest()[:8]
|
|
if checksum != data[156:]:
|
|
raise Exception("Checksum doesn't match")
|
|
|
|
# version 0488ade4
|
|
# depth 00
|
|
# fingerprint 00000000
|
|
# child_num 00000000
|
|
# chaincode 873dff81c02f525623fd1fe5167eac3a55a049de3d314bb42ee227ffed37d508
|
|
# privkey 00e8f32e723decf4051aefac8e2c93c9c5b214313817cdb01a1494b917c8436b35
|
|
# checksum e77e9d71
|
|
|
|
node.depth = int(data[8:10], 16)
|
|
node.fingerprint = int(data[10:18], 16)
|
|
node.child_num = int(data[18:26], 16)
|
|
node.chain_code = data[26:90].decode('hex')
|
|
node.private_key = data[92:156].decode('hex') # skip 0x00 indicating privkey
|
|
|
|
resp = self.call(proto.LoadDevice(node=node,
|
|
pin=pin,
|
|
passphrase_protection=passphrase_protection,
|
|
language=language,
|
|
label=label))
|
|
self.init_device()
|
|
return resp
|
|
|
|
def firmware_update(self, fp):
|
|
if self.features.bootloader_mode == False:
|
|
raise Exception("Device must be in bootloader mode")
|
|
|
|
resp = self.call(proto.FirmwareErase())
|
|
if isinstance(resp, proto.Failure) and resp.code == types.Failure_FirmwareError:
|
|
return False
|
|
|
|
resp = self.call(proto.FirmwareUpload(payload=fp.read()))
|
|
if isinstance(resp, proto.Success):
|
|
return True
|
|
|
|
elif isinstance(resp, proto.Failure) and resp.code == types.Failure_FirmwareError:
|
|
return False
|
|
|
|
raise Exception("Unexpected result " % resp)
|
|
|
|
class TrezorClient(ProtocolMixin, TextUIMixin, BaseClient):
|
|
pass
|
|
|
|
class TrezorClientDebug(ProtocolMixin, TextUIMixin, DebugWireMixin, BaseClient):
|
|
pass
|
|
|
|
class TrezorDebugClient(ProtocolMixin, DebugLinkMixin, DebugWireMixin, BaseClient):
|
|
pass
|
|
|
|
'''
|
|
def _sign_tx(self, coin_name, inputs, outputs):
|
|
''
|
|
inputs: list of TxInput
|
|
outputs: list of TxOutput
|
|
|
|
proto.TxInput(index=0,
|
|
address_n=0,
|
|
amount=0,
|
|
prev_hash='',
|
|
prev_index=0,
|
|
#script_sig=
|
|
)
|
|
proto.TxOutput(index=0,
|
|
address='1Bitkey',
|
|
#address_n=[],
|
|
amount=100000000,
|
|
script_type=proto.PAYTOADDRESS,
|
|
#script_args=
|
|
)
|
|
''
|
|
|
|
start = time.time()
|
|
|
|
try:
|
|
self.transport.session_begin()
|
|
|
|
# Prepare and send initial message
|
|
tx = proto.SignTx()
|
|
tx.inputs_count = len(inputs)
|
|
tx.outputs_count = len(outputs)
|
|
res = self.call(tx)
|
|
|
|
# Prepare structure for signatures
|
|
signatures = [None]*len(inputs)
|
|
serialized_tx = ''
|
|
|
|
counter = 0
|
|
while True:
|
|
counter += 1
|
|
|
|
if isinstance(res, proto.Failure):
|
|
raise CallException("Signing failed")
|
|
|
|
if not isinstance(res, proto.TxRequest):
|
|
raise CallException("Unexpected message")
|
|
|
|
# If there's some part of signed transaction, let's add it
|
|
if res.serialized_tx:
|
|
print "!!! RECEIVED PART OF SERIALIED TX (%d BYTES)" % len(res.serialized_tx)
|
|
serialized_tx += res.serialized_tx
|
|
|
|
if res.signed_index >= 0 and res.signature:
|
|
print "!!! SIGNED INPUT", res.signed_index
|
|
signatures[res.signed_index] = res.signature
|
|
|
|
if res.request_index < 0:
|
|
# Device didn't ask for more information, finish workflow
|
|
break
|
|
|
|
# Device asked for one more information, let's process it.
|
|
if res.request_type == types.TXOUTPUT:
|
|
res = self.call(outputs[res.request_index])
|
|
continue
|
|
|
|
elif res.request_type == types.TXINPUT:
|
|
print "REQUESTING", res.request_index
|
|
res = self.call(inputs[res.request_index])
|
|
continue
|
|
|
|
finally:
|
|
self.transport.session_end()
|
|
|
|
print "SIGNED IN %.03f SECONDS, CALLED %d MESSAGES, %d BYTES" % \
|
|
(time.time() - start, counter, len(serialized_tx))
|
|
|
|
return (signatures, serialized_tx)
|
|
'''
|