import base64 import re import threading from binascii import hexlify, unhexlify from functools import partial from electrum.util import bfh, bh2u from electrum.bitcoin import (bc_address_to_hash_160, xpub_from_pubkey, public_key_to_p2pkh, EncodeBase58Check, TYPE_ADDRESS, TYPE_SCRIPT, TESTNET, ADDRTYPE_P2PKH, ADDRTYPE_P2SH) from electrum.i18n import _ from electrum.plugins import BasePlugin, hook from electrum.transaction import deserialize, Transaction from electrum.keystore import Hardware_KeyStore, is_xpubkey, parse_xpubkey from ..hw_wallet import HW_PluginBase # TREZOR initialization methods TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4) class TrezorCompatibleKeyStore(Hardware_KeyStore): def get_derivation(self): return self.derivation def get_client(self, force_pair=True): return self.plugin.get_client(self, force_pair) def decrypt_message(self, sequence, message, password): raise RuntimeError(_('Electrum and %s encryption and decryption are currently incompatible') % self.device) client = self.get_client() address_path = self.get_derivation() + "/%d/%d"%sequence address_n = client.expand_path(address_path) payload = base64.b64decode(message) nonce, message, msg_hmac = payload[:33], payload[33:-8], payload[-8:] result = client.decrypt_message(address_n, nonce, message, msg_hmac) return result.message def sign_message(self, sequence, message, password): client = self.get_client() address_path = self.get_derivation() + "/%d/%d"%sequence address_n = client.expand_path(address_path) msg_sig = client.sign_message(self.plugin.get_coin_name(), address_n, message) return msg_sig.signature def sign_transaction(self, tx, password): if tx.is_complete(): return # previous transactions used as inputs prev_tx = {} # path of the xpubs that are involved xpub_path = {} for txin in tx.inputs(): pubkeys, x_pubkeys = tx.get_sorted_pubkeys(txin) tx_hash = txin['prevout_hash'] prev_tx[tx_hash] = txin['prev_tx'] for x_pubkey in x_pubkeys: if not is_xpubkey(x_pubkey): continue xpub, s = parse_xpubkey(x_pubkey) if xpub == self.get_master_public_key(): xpub_path[xpub] = self.get_derivation() self.plugin.sign_transaction(self, tx, prev_tx, xpub_path) class TrezorCompatiblePlugin(HW_PluginBase): # Derived classes provide: # # class-static variables: client_class, firmware_URL, handler_class, # libraries_available, libraries_URL, minimum_firmware, # wallet_class, ckd_public, types, HidTransport MAX_LABEL_LEN = 32 def __init__(self, parent, config, name): HW_PluginBase.__init__(self, parent, config, name) self.main_thread = threading.current_thread() # FIXME: move to base class when Ledger is fixed if self.libraries_available: self.device_manager().register_devices(self.DEVICE_IDS) def _try_hid(self, device): self.print_error("Trying to connect over USB...") if device.interface_number == 1: pair = [None, device.path] else: pair = [device.path, None] try: return self.hid_transport(pair) except BaseException as e: # see fdb810ba622dc7dbe1259cbafb5b28e19d2ab114 # raise self.print_error("cannot connect at", device.path, str(e)) return None def _try_bridge(self, device): self.print_error("Trying to connect over Trezor Bridge...") try: return self.bridge_transport({'path': hexlify(device.path)}) except BaseException as e: self.print_error("cannot connect to bridge", str(e)) return None def create_client(self, device, handler): # disable bridge because it seems to never returns if keepkey is plugged #transport = self._try_bridge(device) or self._try_hid(device) transport = self._try_hid(device) if not transport: self.print_error("cannot connect to device") return self.print_error("connected to device at", device.path) client = self.client_class(transport, handler, self) # Try a ping for device sanity try: client.ping('t') except BaseException as e: self.print_error("ping failed", str(e)) return None if not client.atleast_version(*self.minimum_firmware): msg = (_('Outdated %s firmware for device labelled %s. Please ' 'download the updated firmware from %s') % (self.device, client.label(), self.firmware_URL)) self.print_error(msg) handler.show_error(msg) return None return client def get_client(self, keystore, force_pair=True): # All client interaction should not be in the main GUI thread assert self.main_thread != threading.current_thread() devmgr = self.device_manager() handler = keystore.handler with devmgr.hid_lock: client = devmgr.client_for_keystore(self, handler, keystore, force_pair) # returns the client for a given keystore. can use xpub if client: client.used() return client def get_coin_name(self): return "Testnet" if TESTNET else "Bitcoin" def initialize_device(self, device_id, wizard, handler): # Initialization method msg = _("Choose how you want to initialize your %s.\n\n" "The first two methods are secure as no secret information " "is entered into your computer.\n\n" "For the last two methods you input secrets on your keyboard " "and upload them to your %s, and so you should " "only do those on a computer you know to be trustworthy " "and free of malware." ) % (self.device, self.device) choices = [ # Must be short as QT doesn't word-wrap radio button text (TIM_NEW, _("Let the device generate a completely new seed randomly")), (TIM_RECOVER, _("Recover from a seed you have previously written down")), (TIM_MNEMONIC, _("Upload a BIP39 mnemonic to generate the seed")), (TIM_PRIVKEY, _("Upload a master private key")) ] def f(method): import threading settings = self.request_trezor_init_settings(wizard, method, self.device) t = threading.Thread(target = self._initialize_device, args=(settings, method, device_id, wizard, handler)) t.setDaemon(True) t.start() wizard.loop.exec_() wizard.choice_dialog(title=_('Initialize Device'), message=msg, choices=choices, run_next=f) def _initialize_device(self, settings, method, device_id, wizard, handler): item, label, pin_protection, passphrase_protection = settings if method == TIM_RECOVER and self.device == 'TREZOR': # Warn user about firmware lameness handler.show_error(_( "You will be asked to enter 24 words regardless of your " "seed's actual length. If you enter a word incorrectly or " "misspell it, you cannot change it or go back - you will need " "to start again from the beginning.\n\nSo please enter " "the words carefully!")) language = 'english' devmgr = self.device_manager() client = devmgr.client_by_id(device_id) if method == TIM_NEW: strength = 64 * (item + 2) # 128, 192 or 256 u2f_counter = 0 skip_backup = False client.reset_device(True, strength, passphrase_protection, pin_protection, label, language, u2f_counter, skip_backup) elif method == TIM_RECOVER: word_count = 6 * (item + 2) # 12, 18 or 24 client.step = 0 client.recovery_device(word_count, passphrase_protection, pin_protection, label, language) elif method == TIM_MNEMONIC: pin = pin_protection # It's the pin, not a boolean client.load_device_by_mnemonic(str(item), pin, passphrase_protection, label, language) else: pin = pin_protection # It's the pin, not a boolean client.load_device_by_xprv(item, pin, passphrase_protection, label, language) wizard.loop.exit(0) def setup_device(self, device_info, wizard): '''Called when creating a new wallet. Select the device to use. If the device is uninitialized, go through the intialization process.''' devmgr = self.device_manager() device_id = device_info.device.id_ client = devmgr.client_by_id(device_id) # fixme: we should use: client.handler = wizard client.handler = self.create_handler(wizard) if not device_info.initialized: self.initialize_device(device_id, wizard, client.handler) client.get_xpub('m') client.used() def get_xpub(self, device_id, derivation, wizard): devmgr = self.device_manager() client = devmgr.client_by_id(device_id) client.handler = wizard xpub = client.get_xpub(derivation) client.used() return xpub def sign_transaction(self, keystore, tx, prev_tx, xpub_path): self.prev_tx = prev_tx self.xpub_path = xpub_path client = self.get_client(keystore) inputs = self.tx_inputs(tx, True) outputs = self.tx_outputs(keystore.get_derivation(), tx) signed_tx = client.sign_tx(self.get_coin_name(), inputs, outputs, lock_time=tx.locktime)[1] raw = bh2u(signed_tx) tx.update_signatures(raw) def show_address(self, wallet, address): client = self.get_client(wallet.keystore) if not client.atleast_version(1, 3): keystore.handler.show_error(_("Your device firmware is too old")) return change, index = wallet.get_address_index(address) derivation = wallet.keystore.derivation address_path = "%s/%d/%d"%(derivation, change, index) address_n = client.expand_path(address_path) client.get_address(self.get_coin_name(), address_n, True) def tx_inputs(self, tx, for_sig=False): inputs = [] for txin in tx.inputs(): txinputtype = self.types.TxInputType() if txin['type'] == 'coinbase': prev_hash = "\0"*32 prev_index = 0xffffffff # signed int -1 else: if for_sig: x_pubkeys = txin['x_pubkeys'] if len(x_pubkeys) == 1: x_pubkey = x_pubkeys[0] xpub, s = parse_xpubkey(x_pubkey) xpub_n = self.client_class.expand_path(self.xpub_path[xpub]) txinputtype.address_n.extend(xpub_n + s) else: def f(x_pubkey): if is_xpubkey(x_pubkey): xpub, s = parse_xpubkey(x_pubkey) else: xpub = xpub_from_pubkey(0, bfh(x_pubkey)) s = [] node = self.ckd_public.deserialize(xpub) return self.types.HDNodePathType(node=node, address_n=s) pubkeys = map(f, x_pubkeys) multisig = self.types.MultisigRedeemScriptType( pubkeys=pubkeys, signatures=map(lambda x: bfh(x)[:-1] if x else b'', txin.get('signatures')), m=txin.get('num_sig'), ) txinputtype = self.types.TxInputType( script_type=self.types.SPENDMULTISIG, multisig=multisig ) # find which key is mine for x_pubkey in x_pubkeys: if is_xpubkey(x_pubkey): xpub, s = parse_xpubkey(x_pubkey) if xpub in self.xpub_path: xpub_n = self.client_class.expand_path(self.xpub_path[xpub]) txinputtype.address_n.extend(xpub_n + s) break prev_hash = unhexlify(txin['prevout_hash']) prev_index = txin['prevout_n'] txinputtype.prev_hash = prev_hash txinputtype.prev_index = prev_index if 'scriptSig' in txin: script_sig = bfh(txin['scriptSig']) txinputtype.script_sig = script_sig txinputtype.sequence = txin.get('sequence', 0xffffffff - 1) inputs.append(txinputtype) return inputs def tx_outputs(self, derivation, tx): outputs = [] has_change = False for _type, address, amount in tx.outputs(): info = tx.output_info.get(address) if info is not None and not has_change: has_change = True # no more than one change address addrtype, hash_160 = bc_address_to_hash_160(address) index, xpubs, m = info if addrtype == ADDRTYPE_P2PKH: address_n = self.client_class.expand_path(derivation + "/%d/%d"%index) txoutputtype = self.types.TxOutputType( amount = amount, script_type = self.types.PAYTOADDRESS, address_n = address_n, ) elif addrtype == ADDRTYPE_P2SH: address_n = self.client_class.expand_path("/%d/%d"%index) nodes = map(self.ckd_public.deserialize, xpubs) pubkeys = [ self.types.HDNodePathType(node=node, address_n=address_n) for node in nodes] multisig = self.types.MultisigRedeemScriptType( pubkeys = pubkeys, signatures = [b''] * len(pubkeys), m = m) txoutputtype = self.types.TxOutputType( multisig = multisig, amount = amount, address_n = self.client_class.expand_path(derivation + "/%d/%d"%index), script_type = self.types.PAYTOMULTISIG) else: txoutputtype = self.types.TxOutputType() txoutputtype.amount = amount if _type == TYPE_SCRIPT: txoutputtype.script_type = self.types.PAYTOOPRETURN txoutputtype.op_return_data = address[2:] elif _type == TYPE_ADDRESS: addrtype, hash_160 = bc_address_to_hash_160(address) if addrtype == ADDRTYPE_P2PKH: txoutputtype.script_type = self.types.PAYTOADDRESS elif addrtype == ADDRTYPE_P2SH: txoutputtype.script_type = self.types.PAYTOSCRIPTHASH else: raise BaseException('addrtype') txoutputtype.address = address outputs.append(txoutputtype) return outputs def electrum_tx_to_txtype(self, tx): t = self.types.TransactionType() d = deserialize(tx.raw) t.version = d['version'] t.lock_time = d['lockTime'] inputs = self.tx_inputs(tx) t.inputs.extend(inputs) for vout in d['outputs']: o = t.bin_outputs.add() 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)