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494 lines
21 KiB
494 lines
21 KiB
from binascii import hexlify, unhexlify
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import traceback
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import sys
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from electrum.util import bfh, bh2u, versiontuple, UserCancelled
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from electrum.bitcoin import (b58_address_to_hash160, xpub_from_pubkey, deserialize_xpub,
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TYPE_ADDRESS, TYPE_SCRIPT, is_address)
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from electrum import constants
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from electrum.i18n import _
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from electrum.plugin import BasePlugin, Device
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from electrum.transaction import deserialize, Transaction
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from electrum.keystore import Hardware_KeyStore, is_xpubkey, parse_xpubkey
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from electrum.base_wizard import ScriptTypeNotSupported
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from ..hw_wallet import HW_PluginBase
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from ..hw_wallet.plugin import is_any_tx_output_on_change_branch, trezor_validate_op_return_output_and_get_data
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# Safe-T mini initialization methods
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TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4)
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class SafeTKeyStore(Hardware_KeyStore):
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hw_type = 'safe_t'
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device = 'Safe-T mini'
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def get_derivation(self):
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return self.derivation
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def get_client(self, force_pair=True):
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return self.plugin.get_client(self, force_pair)
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def decrypt_message(self, sequence, message, password):
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raise RuntimeError(_('Encryption and decryption are not implemented by {}').format(self.device))
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def sign_message(self, sequence, message, password):
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client = self.get_client()
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address_path = self.get_derivation() + "/%d/%d"%sequence
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address_n = client.expand_path(address_path)
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msg_sig = client.sign_message(self.plugin.get_coin_name(), address_n, message)
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return msg_sig.signature
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def sign_transaction(self, tx, password):
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if tx.is_complete():
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return
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# previous transactions used as inputs
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prev_tx = {}
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# path of the xpubs that are involved
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xpub_path = {}
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for txin in tx.inputs():
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pubkeys, x_pubkeys = tx.get_sorted_pubkeys(txin)
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tx_hash = txin['prevout_hash']
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if txin.get('prev_tx') is None and not Transaction.is_segwit_input(txin):
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raise Exception(_('Offline signing with {} is not supported for legacy inputs.').format(self.device))
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prev_tx[tx_hash] = txin['prev_tx']
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for x_pubkey in x_pubkeys:
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if not is_xpubkey(x_pubkey):
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continue
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xpub, s = parse_xpubkey(x_pubkey)
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if xpub == self.get_master_public_key():
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xpub_path[xpub] = self.get_derivation()
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self.plugin.sign_transaction(self, tx, prev_tx, xpub_path)
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class SafeTPlugin(HW_PluginBase):
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# Derived classes provide:
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#
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# class-static variables: client_class, firmware_URL, handler_class,
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# libraries_available, libraries_URL, minimum_firmware,
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# wallet_class, types
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firmware_URL = 'https://safe-t.io'
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libraries_URL = 'https://github.com/archos-safe-t/python-safet'
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minimum_firmware = (1, 0, 5)
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keystore_class = SafeTKeyStore
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minimum_library = (0, 1, 0)
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SUPPORTED_XTYPES = ('standard', 'p2wpkh-p2sh', 'p2wpkh', 'p2wsh-p2sh', 'p2wsh')
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MAX_LABEL_LEN = 32
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def __init__(self, parent, config, name):
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HW_PluginBase.__init__(self, parent, config, name)
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try:
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# Minimal test if python-safet is installed
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import safetlib
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try:
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library_version = safetlib.__version__
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except AttributeError:
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# python-safet only introduced __version__ in 0.1.0
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library_version = 'unknown'
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if library_version == 'unknown' or \
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versiontuple(library_version) < self.minimum_library:
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self.libraries_available_message = (
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_("Library version for '{}' is too old.").format(name)
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+ '\nInstalled: {}, Needed: {}'
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.format(library_version, self.minimum_library))
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self.print_stderr(self.libraries_available_message)
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raise ImportError()
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self.libraries_available = True
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except ImportError:
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self.libraries_available = False
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return
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from . import client
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from . import transport
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import safetlib.messages
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self.client_class = client.SafeTClient
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self.types = safetlib.messages
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self.DEVICE_IDS = ('Safe-T mini',)
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self.transport_handler = transport.SafeTTransport()
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self.device_manager().register_enumerate_func(self.enumerate)
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def enumerate(self):
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devices = self.transport_handler.enumerate_devices()
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return [Device(d.get_path(), -1, d.get_path(), 'Safe-T mini', 0) for d in devices]
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def create_client(self, device, handler):
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try:
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self.print_error("connecting to device at", device.path)
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transport = self.transport_handler.get_transport(device.path)
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except BaseException as e:
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self.print_error("cannot connect at", device.path, str(e))
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return None
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if not transport:
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self.print_error("cannot connect at", device.path)
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return
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self.print_error("connected to device at", device.path)
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client = self.client_class(transport, handler, self)
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# Try a ping for device sanity
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try:
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client.ping('t')
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except BaseException as e:
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self.print_error("ping failed", str(e))
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return None
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if not client.atleast_version(*self.minimum_firmware):
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msg = (_('Outdated {} firmware for device labelled {}. Please '
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'download the updated firmware from {}')
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.format(self.device, client.label(), self.firmware_URL))
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self.print_error(msg)
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if handler:
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handler.show_error(msg)
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else:
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raise Exception(msg)
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return None
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return client
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def get_client(self, keystore, force_pair=True):
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devmgr = self.device_manager()
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handler = keystore.handler
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with devmgr.hid_lock:
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client = devmgr.client_for_keystore(self, handler, keystore, force_pair)
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# returns the client for a given keystore. can use xpub
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if client:
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client.used()
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return client
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def get_coin_name(self):
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return "Testnet" if constants.net.TESTNET else "Bitcoin"
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def initialize_device(self, device_id, wizard, handler):
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# Initialization method
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msg = _("Choose how you want to initialize your {}.\n\n"
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"The first two methods are secure as no secret information "
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"is entered into your computer.\n\n"
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"For the last two methods you input secrets on your keyboard "
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"and upload them to your {}, and so you should "
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"only do those on a computer you know to be trustworthy "
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"and free of malware."
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).format(self.device, self.device)
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choices = [
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# Must be short as QT doesn't word-wrap radio button text
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(TIM_NEW, _("Let the device generate a completely new seed randomly")),
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(TIM_RECOVER, _("Recover from a seed you have previously written down")),
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(TIM_MNEMONIC, _("Upload a BIP39 mnemonic to generate the seed")),
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(TIM_PRIVKEY, _("Upload a master private key"))
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]
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def f(method):
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import threading
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settings = self.request_safe_t_init_settings(wizard, method, self.device)
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t = threading.Thread(target=self._initialize_device_safe, args=(settings, method, device_id, wizard, handler))
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t.setDaemon(True)
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t.start()
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exit_code = wizard.loop.exec_()
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if exit_code != 0:
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# this method (initialize_device) was called with the expectation
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# of leaving the device in an initialized state when finishing.
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# signal that this is not the case:
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raise UserCancelled()
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wizard.choice_dialog(title=_('Initialize Device'), message=msg, choices=choices, run_next=f)
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def _initialize_device_safe(self, settings, method, device_id, wizard, handler):
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exit_code = 0
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try:
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self._initialize_device(settings, method, device_id, wizard, handler)
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except UserCancelled:
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exit_code = 1
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except BaseException as e:
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traceback.print_exc(file=sys.stderr)
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handler.show_error(str(e))
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exit_code = 1
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finally:
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wizard.loop.exit(exit_code)
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def _initialize_device(self, settings, method, device_id, wizard, handler):
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item, label, pin_protection, passphrase_protection = settings
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if method == TIM_RECOVER:
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handler.show_error(_(
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"You will be asked to enter 24 words regardless of your "
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"seed's actual length. If you enter a word incorrectly or "
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"misspell it, you cannot change it or go back - you will need "
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"to start again from the beginning.\n\nSo please enter "
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"the words carefully!"),
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blocking=True)
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language = 'english'
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devmgr = self.device_manager()
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client = devmgr.client_by_id(device_id)
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if method == TIM_NEW:
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strength = 64 * (item + 2) # 128, 192 or 256
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u2f_counter = 0
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skip_backup = False
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client.reset_device(True, strength, passphrase_protection,
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pin_protection, label, language,
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u2f_counter, skip_backup)
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elif method == TIM_RECOVER:
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word_count = 6 * (item + 2) # 12, 18 or 24
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client.step = 0
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client.recovery_device(word_count, passphrase_protection,
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pin_protection, label, language)
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elif method == TIM_MNEMONIC:
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pin = pin_protection # It's the pin, not a boolean
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client.load_device_by_mnemonic(str(item), pin,
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passphrase_protection,
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label, language)
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else:
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pin = pin_protection # It's the pin, not a boolean
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client.load_device_by_xprv(item, pin, passphrase_protection,
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label, language)
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def _make_node_path(self, xpub, address_n):
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_, depth, fingerprint, child_num, chain_code, key = deserialize_xpub(xpub)
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node = self.types.HDNodeType(
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depth=depth,
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fingerprint=int.from_bytes(fingerprint, 'big'),
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child_num=int.from_bytes(child_num, 'big'),
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chain_code=chain_code,
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public_key=key,
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)
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return self.types.HDNodePathType(node=node, address_n=address_n)
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def setup_device(self, device_info, wizard, purpose):
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devmgr = self.device_manager()
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device_id = device_info.device.id_
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client = devmgr.client_by_id(device_id)
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if client is None:
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raise Exception(_('Failed to create a client for this device.') + '\n' +
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_('Make sure it is in the correct state.'))
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# fixme: we should use: client.handler = wizard
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client.handler = self.create_handler(wizard)
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if not device_info.initialized:
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self.initialize_device(device_id, wizard, client.handler)
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client.get_xpub('m', 'standard')
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client.used()
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def get_xpub(self, device_id, derivation, xtype, wizard):
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if xtype not in self.SUPPORTED_XTYPES:
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raise ScriptTypeNotSupported(_('This type of script is not supported with {}.').format(self.device))
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devmgr = self.device_manager()
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client = devmgr.client_by_id(device_id)
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client.handler = wizard
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xpub = client.get_xpub(derivation, xtype)
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client.used()
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return xpub
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def get_safet_input_script_type(self, electrum_txin_type: str):
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if electrum_txin_type in ('p2wpkh', 'p2wsh'):
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return self.types.InputScriptType.SPENDWITNESS
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if electrum_txin_type in ('p2wpkh-p2sh', 'p2wsh-p2sh'):
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return self.types.InputScriptType.SPENDP2SHWITNESS
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if electrum_txin_type in ('p2pkh', ):
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return self.types.InputScriptType.SPENDADDRESS
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if electrum_txin_type in ('p2sh', ):
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return self.types.InputScriptType.SPENDMULTISIG
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raise ValueError('unexpected txin type: {}'.format(electrum_txin_type))
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def get_safet_output_script_type(self, electrum_txin_type: str):
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if electrum_txin_type in ('p2wpkh', 'p2wsh'):
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return self.types.OutputScriptType.PAYTOWITNESS
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if electrum_txin_type in ('p2wpkh-p2sh', 'p2wsh-p2sh'):
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return self.types.OutputScriptType.PAYTOP2SHWITNESS
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if electrum_txin_type in ('p2pkh', ):
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return self.types.OutputScriptType.PAYTOADDRESS
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if electrum_txin_type in ('p2sh', ):
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return self.types.OutputScriptType.PAYTOMULTISIG
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raise ValueError('unexpected txin type: {}'.format(electrum_txin_type))
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def sign_transaction(self, keystore, tx, prev_tx, xpub_path):
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self.prev_tx = prev_tx
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self.xpub_path = xpub_path
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client = self.get_client(keystore)
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inputs = self.tx_inputs(tx, True)
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outputs = self.tx_outputs(keystore.get_derivation(), tx)
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signatures = client.sign_tx(self.get_coin_name(), inputs, outputs, lock_time=tx.locktime)[0]
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signatures = [(bh2u(x) + '01') for x in signatures]
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tx.update_signatures(signatures)
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def show_address(self, wallet, address, keystore=None):
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if keystore is None:
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keystore = wallet.get_keystore()
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if not self.show_address_helper(wallet, address, keystore):
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return
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client = self.get_client(keystore)
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if not client.atleast_version(1, 0):
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keystore.handler.show_error(_("Your device firmware is too old"))
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return
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change, index = wallet.get_address_index(address)
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derivation = keystore.derivation
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address_path = "%s/%d/%d"%(derivation, change, index)
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address_n = client.expand_path(address_path)
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xpubs = wallet.get_master_public_keys()
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if len(xpubs) == 1:
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script_type = self.get_safet_input_script_type(wallet.txin_type)
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client.get_address(self.get_coin_name(), address_n, True, script_type=script_type)
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else:
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def f(xpub):
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return self._make_node_path(xpub, [change, index])
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pubkeys = wallet.get_public_keys(address)
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# sort xpubs using the order of pubkeys
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sorted_pubkeys, sorted_xpubs = zip(*sorted(zip(pubkeys, xpubs)))
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pubkeys = list(map(f, sorted_xpubs))
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multisig = self.types.MultisigRedeemScriptType(
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pubkeys=pubkeys,
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signatures=[b''] * wallet.n,
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m=wallet.m,
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)
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script_type = self.get_safet_input_script_type(wallet.txin_type)
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client.get_address(self.get_coin_name(), address_n, True, multisig=multisig, script_type=script_type)
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def tx_inputs(self, tx, for_sig=False):
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inputs = []
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for txin in tx.inputs():
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txinputtype = self.types.TxInputType()
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if txin['type'] == 'coinbase':
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prev_hash = b"\x00"*32
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prev_index = 0xffffffff # signed int -1
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else:
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if for_sig:
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x_pubkeys = txin['x_pubkeys']
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if len(x_pubkeys) == 1:
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x_pubkey = x_pubkeys[0]
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xpub, s = parse_xpubkey(x_pubkey)
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xpub_n = self.client_class.expand_path(self.xpub_path[xpub])
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txinputtype._extend_address_n(xpub_n + s)
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txinputtype.script_type = self.get_safet_input_script_type(txin['type'])
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else:
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def f(x_pubkey):
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if is_xpubkey(x_pubkey):
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xpub, s = parse_xpubkey(x_pubkey)
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else:
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xpub = xpub_from_pubkey(0, bfh(x_pubkey))
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s = []
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return self._make_node_path(xpub, s)
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pubkeys = list(map(f, x_pubkeys))
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multisig = self.types.MultisigRedeemScriptType(
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pubkeys=pubkeys,
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signatures=list(map(lambda x: bfh(x)[:-1] if x else b'', txin.get('signatures'))),
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m=txin.get('num_sig'),
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)
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script_type = self.get_safet_input_script_type(txin['type'])
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txinputtype = self.types.TxInputType(
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script_type=script_type,
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multisig=multisig
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)
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# find which key is mine
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for x_pubkey in x_pubkeys:
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if is_xpubkey(x_pubkey):
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xpub, s = parse_xpubkey(x_pubkey)
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if xpub in self.xpub_path:
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xpub_n = self.client_class.expand_path(self.xpub_path[xpub])
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txinputtype._extend_address_n(xpub_n + s)
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break
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prev_hash = unhexlify(txin['prevout_hash'])
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prev_index = txin['prevout_n']
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if 'value' in txin:
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txinputtype.amount = txin['value']
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txinputtype.prev_hash = prev_hash
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txinputtype.prev_index = prev_index
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if txin.get('scriptSig') is not None:
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script_sig = bfh(txin['scriptSig'])
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txinputtype.script_sig = script_sig
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txinputtype.sequence = txin.get('sequence', 0xffffffff - 1)
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inputs.append(txinputtype)
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return inputs
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def tx_outputs(self, derivation, tx):
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def create_output_by_derivation():
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script_type = self.get_trezor_output_script_type(info.script_type)
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if len(xpubs) == 1:
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address_n = self.client_class.expand_path(derivation + "/%d/%d" % index)
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txoutputtype = self.types.TxOutputType(
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amount=amount,
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script_type=script_type,
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address_n=address_n,
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)
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else:
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address_n = self.client_class.expand_path("/%d/%d" % index)
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pubkeys = [self._make_node_path(xpub, address_n) for xpub in xpubs]
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multisig = self.types.MultisigRedeemScriptType(
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pubkeys=pubkeys,
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signatures=[b''] * len(pubkeys),
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m=m)
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txoutputtype = self.types.TxOutputType(
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multisig=multisig,
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amount=amount,
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address_n=self.client_class.expand_path(derivation + "/%d/%d" % index),
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script_type=script_type)
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return txoutputtype
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def create_output_by_address():
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txoutputtype = self.types.TxOutputType()
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txoutputtype.amount = amount
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if _type == TYPE_SCRIPT:
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txoutputtype.script_type = self.types.OutputScriptType.PAYTOOPRETURN
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txoutputtype.op_return_data = trezor_validate_op_return_output_and_get_data(o)
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elif _type == TYPE_ADDRESS:
|
|
txoutputtype.script_type = self.types.OutputScriptType.PAYTOADDRESS
|
|
txoutputtype.address = address
|
|
return txoutputtype
|
|
|
|
outputs = []
|
|
has_change = False
|
|
any_output_on_change_branch = is_any_tx_output_on_change_branch(tx)
|
|
|
|
for o in tx.outputs():
|
|
_type, address, amount = o.type, o.address, o.value
|
|
use_create_by_derivation = False
|
|
|
|
info = tx.output_info.get(address)
|
|
if info is not None and not has_change:
|
|
index, xpubs, m = info.address_index, info.sorted_xpubs, info.num_sig
|
|
on_change_branch = index[0] == 1
|
|
# prioritise hiding outputs on the 'change' branch from user
|
|
# because no more than one change address allowed
|
|
# note: ^ restriction can be removed once we require fw
|
|
# that has https://github.com/trezor/trezor-mcu/pull/306
|
|
if on_change_branch == any_output_on_change_branch:
|
|
use_create_by_derivation = True
|
|
has_change = True
|
|
|
|
if use_create_by_derivation:
|
|
txoutputtype = create_output_by_derivation()
|
|
else:
|
|
txoutputtype = create_output_by_address()
|
|
outputs.append(txoutputtype)
|
|
|
|
return outputs
|
|
|
|
def electrum_tx_to_txtype(self, tx):
|
|
t = self.types.TransactionType()
|
|
if tx is None:
|
|
# probably for segwit input and we don't need this prev txn
|
|
return t
|
|
d = deserialize(tx.raw)
|
|
t.version = d['version']
|
|
t.lock_time = d['lockTime']
|
|
inputs = self.tx_inputs(tx)
|
|
t._extend_inputs(inputs)
|
|
for vout in d['outputs']:
|
|
o = t._add_bin_outputs()
|
|
o.amount = vout['value']
|
|
o.script_pubkey = bfh(vout['scriptPubKey'])
|
|
return t
|
|
|
|
# This function is called from the TREZOR libraries (via tx_api)
|
|
def get_tx(self, tx_hash):
|
|
tx = self.prev_tx[tx_hash]
|
|
return self.electrum_tx_to_txtype(tx)
|
|
|