450 lines
19 KiB
Python
450 lines
19 KiB
Python
from binascii import hexlify, unhexlify
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from electrum_bitcoinprivate.util import bfh, bh2u, versiontuple
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from electrum_bitcoinprivate.bitcoin import (b58_address_to_hash160, xpub_from_pubkey,
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TYPE_ADDRESS, TYPE_SCRIPT)
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from electrum_bitcoinprivate import constants
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from electrum_bitcoinprivate.i18n import _
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from electrum_bitcoinprivate.plugins import BasePlugin, Device
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from electrum_bitcoinprivate.transaction import deserialize, Transaction
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from electrum_bitcoinprivate.keystore import Hardware_KeyStore, is_xpubkey, parse_xpubkey
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from ..hw_wallet import HW_PluginBase
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# TREZOR initialization methods
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TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4)
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# script "generation"
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SCRIPT_GEN_LEGACY, SCRIPT_GEN_P2SH_SEGWIT, SCRIPT_GEN_NATIVE_SEGWIT = range(0, 3)
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class TrezorKeyStore(Hardware_KeyStore):
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hw_type = 'trezor'
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device = 'TREZOR'
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def get_derivation(self):
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return self.derivation
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def get_script_gen(self):
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return SCRIPT_GEN_LEGACY
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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:
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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 TrezorPlugin(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, ckd_public, types
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firmware_URL = 'https://wallet.trezor.io'
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libraries_URL = 'https://github.com/trezor/python-trezor'
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minimum_firmware = (1, 5, 2)
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keystore_class = TrezorKeyStore
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minimum_library = (0, 9, 0)
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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-trezor is installed
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import trezorlib
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try:
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library_version = trezorlib.__version__
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except AttributeError:
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# python-trezor only introduced __version__ in 0.9.0
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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 trezorlib.ckd_public
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import trezorlib.messages
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self.client_class = client.TrezorClient
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self.ckd_public = trezorlib.ckd_public
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self.types = trezorlib.messages
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self.DEVICE_IDS = ('TREZOR',)
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self.transport_handler = transport.TrezorTransport()
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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(), 'TREZOR', 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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handler.show_error(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 "bitcoinprivateTestnet" if constants.net.TESTNET else "bitcoinprivate"
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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_trezor_init_settings(wizard, method, self.device)
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t = threading.Thread(target = self._initialize_device, args=(settings, method, device_id, wizard, handler))
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t.setDaemon(True)
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t.start()
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wizard.loop.exec_()
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wizard.choice_dialog(title=_('Initialize Device'), message=msg, choices=choices, run_next=f)
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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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# FIXME the PIN prompt will appear over this message
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# which makes this unreadable
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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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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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wizard.loop.exit(0)
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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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# 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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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 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, keystore.get_script_gen())
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outputs = self.tx_outputs(keystore.get_derivation(), tx, keystore.get_script_gen())
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signed_tx = client.sign_tx(self.get_coin_name(), inputs, outputs, lock_time=tx.locktime)[1]
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raw = bh2u(signed_tx)
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tx.update_signatures(raw)
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def show_address(self, wallet, keystore, address):
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client = self.get_client(keystore)
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if not client.atleast_version(1, 3):
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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_gen = keystore.get_script_gen()
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script_type = self.types.InputScriptType.SPENDADDRESS
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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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node = self.ckd_public.deserialize(xpub)
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return self.types.HDNodePathType(node=node, address_n=[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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client.get_address(self.get_coin_name(), address_n, True, multisig=multisig)
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def tx_inputs(self, tx, for_sig=False, script_gen=SCRIPT_GEN_LEGACY):
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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 = "\0"*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.types.InputScriptType.SPENDADDRESS
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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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node = self.ckd_public.deserialize(xpub)
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return self.types.HDNodePathType(node=node, address_n=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.types.InputScriptType.SPENDMULTISIG
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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 'scriptSig' in txin:
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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, script_gen=SCRIPT_GEN_LEGACY):
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def create_output_by_derivation(info):
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index, xpubs, m = info
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if len(xpubs) == 1:
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script_type = self.types.OutputScriptType.PAYTOADDRESS
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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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script_type = self.types.OutputScriptType.PAYTOMULTISIG
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address_n = self.client_class.expand_path("/%d/%d" % index)
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nodes = map(self.ckd_public.deserialize, xpubs)
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pubkeys = [self.types.HDNodePathType(node=node, address_n=address_n) for node in nodes]
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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 = address[2:]
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elif _type == TYPE_ADDRESS:
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txoutputtype.script_type = self.types.OutputScriptType.PAYTOADDRESS
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txoutputtype.address = address
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return txoutputtype
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def is_any_output_on_change_branch():
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for _type, address, amount in tx.outputs():
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info = tx.output_info.get(address)
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if info is not None:
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index, xpubs, m = info
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if index[0] == 1:
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return True
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return False
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outputs = []
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has_change = False
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any_output_on_change_branch = is_any_output_on_change_branch()
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for _type, address, amount in tx.outputs():
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use_create_by_derivation = False
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info = tx.output_info.get(address)
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if info is not None and not has_change:
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index, xpubs, m = info
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on_change_branch = index[0] == 1
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# prioritise hiding outputs on the 'change' branch from user
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# because no more than one change address allowed
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# note: ^ restriction can be removed once we require fw
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# that has https://github.com/trezor/trezor-mcu/pull/306
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if on_change_branch == any_output_on_change_branch:
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use_create_by_derivation = True
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has_change = True
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if use_create_by_derivation:
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txoutputtype = create_output_by_derivation(info)
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else:
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txoutputtype = create_output_by_address()
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outputs.append(txoutputtype)
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return outputs
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def electrum_tx_to_txtype(self, tx):
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t = self.types.TransactionType()
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if tx is None:
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# probably for segwit input and we don't need this prev txn
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return t
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d = deserialize(tx.raw)
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t.version = d['version']
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t.lock_time = d['lockTime']
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inputs = self.tx_inputs(tx)
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t._extend_inputs(inputs)
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for vout in d['outputs']:
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o = t._add_bin_outputs()
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o.amount = vout['value']
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o.script_pubkey = bfh(vout['scriptPubKey'])
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return t
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# This function is called from the TREZOR libraries (via tx_api)
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def get_tx(self, tx_hash):
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tx = self.prev_tx[tx_hash]
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return self.electrum_tx_to_txtype(tx)
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