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357 lines
15 KiB
357 lines
15 KiB
import base64
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import re
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import threading
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from binascii import hexlify, unhexlify
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from functools import partial
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from electrum.bitcoin import (bc_address_to_hash_160, xpub_from_pubkey,
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public_key_to_bc_address, EncodeBase58Check,
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TYPE_ADDRESS, TYPE_SCRIPT)
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from electrum.i18n import _
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from electrum.plugins import BasePlugin, hook
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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 ..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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class TrezorCompatibleKeyStore(Hardware_KeyStore):
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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, pubkey, message, password):
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raise RuntimeError(_('Electrum and %s encryption and decryption are currently incompatible') % self.device)
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address = public_key_to_bc_address(pubkey.decode('hex'))
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client = self.get_client()
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address_path = self.address_id(address)
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address_n = client.expand_path(address_path)
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payload = base64.b64decode(message)
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nonce, message, msg_hmac = payload[:33], payload[33:-8], payload[-8:]
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result = client.decrypt_message(address_n, nonce, message, msg_hmac)
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return result.message
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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('Bitcoin', 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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tx_hash = txin['prevout_hash']
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prev_tx[tx_hash] = txin['prev_tx']
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for x_pubkey in txin['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 TrezorCompatiblePlugin(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, HidTransport
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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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self.main_thread = threading.current_thread()
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# FIXME: move to base class when Ledger is fixed
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if self.libraries_available:
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self.device_manager().register_devices(self.DEVICE_IDS)
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def _try_hid(self, device):
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self.print_error("Trying to connect over USB...")
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if device.interface_number == 1:
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pair = [None, device.path]
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else:
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pair = [device.path, None]
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try:
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return self.hid_transport(pair)
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except BaseException as e:
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raise
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self.print_error("cannot connect at", device.path, str(e))
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return None
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def _try_bridge(self, device):
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self.print_error("Trying to connect over Trezor Bridge...")
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try:
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return self.bridge_transport({'path': hexlify(device.path)})
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except BaseException as e:
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self.print_error("cannot connect to bridge", str(e))
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return None
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def create_client(self, device, handler):
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# disable bridge because it seems to never returns if keepkey is plugged
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#transport = self._try_bridge(device) or self._try_hid(device)
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transport = self._try_hid(device)
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if not transport:
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self.print_error("cannot connect to device")
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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 %s firmware for device labelled %s. Please '
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'download the updated firmware from %s') %
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(self.device, client.label(), self.firmware_URL))
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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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# All client interaction should not be in the main GUI thread
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assert self.main_thread != threading.current_thread()
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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 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 %s.\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 %s, 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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) % (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 and self.device == 'TREZOR':
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# Warn user about firmware lameness
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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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client.reset_device(True, strength, passphrase_protection,
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pin_protection, label, language)
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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):
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'''Called when creating a new wallet. Select the device to use. If
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the device is uninitialized, go through the intialization
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process.'''
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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')
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client.used()
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def get_xpub(self, device_id, derivation, 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)
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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)
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outputs = self.tx_outputs(keystore.get_derivation(), tx)
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signed_tx = client.sign_tx('Bitcoin', inputs, outputs)[1]
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raw = signed_tx.encode('hex')
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tx.update_signatures(raw)
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def show_address(self, wallet, address):
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client = self.get_client(wallet.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 = wallet.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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client.get_address('Bitcoin', address_n, True)
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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.get('is_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.address_n.extend(xpub_n + s)
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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(x_pubkey.decode('hex'))
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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 = map(f, x_pubkeys)
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multisig = self.types.MultisigRedeemScriptType(
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pubkeys=pubkeys,
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signatures=map(lambda x: x.decode('hex') if x else '', txin.get('signatures')),
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m=txin.get('num_sig'),
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)
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txinputtype = self.types.TxInputType(
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script_type=self.types.SPENDMULTISIG,
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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.address_n.extend(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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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 = txin['scriptSig'].decode('hex')
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txinputtype.script_sig = script_sig
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if 'sequence' in txin:
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sequence = txin['sequence']
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txinputtype.sequence = sequence
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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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outputs = []
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for i, (_type, address, amount) in enumerate(tx.outputs()):
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txoutputtype = self.types.TxOutputType()
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txoutputtype.amount = amount
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change, index = tx.output_info[i]
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if _type == TYPE_SCRIPT:
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txoutputtype.script_type = self.types.PAYTOOPRETURN
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txoutputtype.op_return_data = address[2:]
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elif _type == TYPE_ADDRESS:
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if change is not None:
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address_path = "%s/%d/%d"%(derivation, change, index)
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address_n = self.client_class.expand_path(address_path)
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txoutputtype.address_n.extend(address_n)
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else:
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txoutputtype.address = address
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addrtype, hash_160 = bc_address_to_hash_160(address)
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if addrtype == 0:
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txoutputtype.script_type = self.types.PAYTOADDRESS
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elif addrtype == 5:
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txoutputtype.script_type = self.types.PAYTOSCRIPTHASH
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else:
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raise BaseException('addrtype')
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else:
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raise BaseException('addrtype')
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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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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.inputs.extend(inputs)
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for vout in d['outputs']:
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o = t.bin_outputs.add()
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o.amount = vout['value']
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o.script_pubkey = vout['scriptPubKey'].decode('hex')
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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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