from binascii import unhexlify from struct import pack from sys import stderr from time import sleep import unicodedata import threading import re import electrum from electrum import bitcoin from electrum.account import BIP32_Account from electrum.bitcoin import EncodeBase58Check, public_key_to_bc_address, bc_address_to_hash_160, xpub_from_pubkey from electrum.i18n import _ from electrum.plugins import BasePlugin, hook, always_hook, run_hook from electrum.transaction import Transaction, deserialize, is_extended_pubkey, x_to_xpub from electrum.wallet import BIP32_HD_Wallet from electrum.util import print_error, print_msg from electrum.wallet import pw_decode, bip32_private_derivation, bip32_root try: from trezorlib.client import types from trezorlib.client import proto, BaseClient, ProtocolMixin from trezorlib.transport import ConnectionError from trezorlib.transport_hid import HidTransport TREZOR = True except ImportError: TREZOR = False import trezorlib.ckd_public as ckd_public def log(msg): stderr.write("%s\n" % msg) stderr.flush() def give_error(message): print_error(message) raise Exception(message) class TrezorWallet(BIP32_HD_Wallet): wallet_type = 'trezor' root_derivation = "m/44'/0'" def __init__(self, storage): BIP32_HD_Wallet.__init__(self, storage) self.mpk = None self.device_checked = False self.proper_device = False self.force_watching_only = False def get_action(self): if not self.accounts: return 'create_accounts' def can_import(self): return False def can_sign_xpubkey(self, x_pubkey): xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey) return xpub in self.master_public_keys.values() def can_export(self): return False def can_create_accounts(self): return True def can_change_password(self): return False def is_watching_only(self): return self.force_watching_only def get_client(self): return self.plugin.get_client() def address_id(self, address): account_id, (change, address_index) = self.get_address_index(address) return "44'/0'/%s'/%d/%d" % (account_id, change, address_index) def create_main_account(self, password): self.create_account('Main account', None) #name, empty password def mnemonic_to_seed(self, mnemonic, passphrase): # trezor uses bip39 import pbkdf2, hashlib, hmac PBKDF2_ROUNDS = 2048 mnemonic = unicodedata.normalize('NFKD', ' '.join(mnemonic.split())) passphrase = unicodedata.normalize('NFKD', passphrase) return pbkdf2.PBKDF2(mnemonic, 'mnemonic' + passphrase, iterations = PBKDF2_ROUNDS, macmodule = hmac, digestmodule = hashlib.sha512).read(64) def derive_xkeys(self, root, derivation, password): x = self.master_private_keys.get(root) if x: root_xprv = pw_decode(x, password) xprv, xpub = bip32_private_derivation(root_xprv, root, derivation) return xpub, xprv else: derivation = derivation.replace(self.root_name,"44'/0'/") xpub = self.get_public_key(derivation) return xpub, None def get_public_key(self, bip32_path): address_n = self.plugin.get_client().expand_path(bip32_path) node = self.plugin.get_client().get_public_node(address_n).node xpub = "0488B21E".decode('hex') + chr(node.depth) + self.i4b(node.fingerprint) + self.i4b(node.child_num) + node.chain_code + node.public_key return EncodeBase58Check(xpub) def get_master_public_key(self): if not self.mpk: self.mpk = self.get_public_key("44'/0'") return self.mpk def i4b(self, x): return pack('>I', x) def add_keypairs(self, tx, keypairs, password): #do nothing - no priv keys available pass def decrypt_message(self, pubkey, message, password): raise BaseException( _('Decrypt method is not implemented in Trezor') ) #address = public_key_to_bc_address(pubkey.decode('hex')) #address_path = self.address_id(address) #address_n = self.get_client().expand_path(address_path) #try: # decrypted_msg = self.get_client().decrypt_message(address_n, b64decode(message)) #except Exception, e: # give_error(e) #finally: # twd.stop() #return str(decrypted_msg) def sign_message(self, address, message, password): if self.has_seed(): return BIP32_HD_Wallet.sign_message(self, address, message, password) if not self.check_proper_device(): give_error('Wrong device or password') try: address_path = self.address_id(address) address_n = self.plugin.get_client().expand_path(address_path) except Exception, e: give_error(e) try: msg_sig = self.plugin.get_client().sign_message('Bitcoin', address_n, message) except Exception, e: give_error(e) finally: self.plugin.handler.stop() return msg_sig.signature def sign_transaction(self, tx, password): if self.has_seed(): return BIP32_HD_Wallet.sign_transaction(self, tx, password) if tx.is_complete(): return if not self.check_proper_device(): give_error('Wrong device or password') # previous transactions used as inputs prev_tx = {} # path of the xpubs that are involved xpub_path = {} for txin in tx.inputs: tx_hash = txin['prevout_hash'] ptx = self.transactions.get(tx_hash) if ptx is None: ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash])) ptx = Transaction(ptx) prev_tx[tx_hash] = ptx for x_pubkey in txin['x_pubkeys']: account_derivation = None if not is_extended_pubkey(x_pubkey): continue xpub = x_to_xpub(x_pubkey) for k, v in self.master_public_keys.items(): if v == xpub: account_id = re.match("x/(\d+)'", k).group(1) account_derivation = "44'/0'/%s'"%account_id if account_derivation is not None: xpub_path[xpub] = account_derivation self.plugin.sign_transaction(tx, prev_tx, xpub_path) def check_proper_device(self): self.get_client().ping('t') if not self.device_checked: address = self.addresses(False)[0] address_id = self.address_id(address) n = self.get_client().expand_path(address_id) device_address = self.get_client().get_address('Bitcoin', n) self.device_checked = True self.proper_device = (device_address == address) return self.proper_device class TrezorPlugin(BasePlugin): def __init__(self, parent, config, name): BasePlugin.__init__(self, parent, config, name) self._is_available = self._init() self.wallet = None self.handler = None self.client = None self.transport = None def constructor(self, s): return TrezorWallet(s) def _init(self): return TREZOR def is_available(self): if not self._is_available: return False if not self.wallet: return False if self.wallet.storage.get('wallet_type') != 'trezor': return False return True def set_enabled(self, enabled): self.wallet.storage.put('use_' + self.name, enabled) def is_enabled(self): if not self.is_available(): return False if self.wallet.has_seed(): return False return True def compare_version(self, major, minor=0, patch=0): features = self.get_client().features v = [features.major_version, features.minor_version, features.patch_version] self.print_error('firmware version', v) return cmp(v, [major, minor, patch]) def atleast_version(self, major, minor=0, patch=0): return self.compare_version(major, minor, patch) >= 0 def get_client(self): if not TREZOR: give_error('please install github.com/trezor/python-trezor') if not self.client or self.client.bad: d = HidTransport.enumerate() if not d: give_error('Could not connect to your Trezor. Please verify the cable is connected and that no other app is using it.') self.transport = HidTransport(d[0]) self.client = QtGuiTrezorClient(self.transport) self.client.handler = self.handler self.client.set_tx_api(self) self.client.bad = False if not self.atleast_version(1, 2, 1): self.client = None give_error('Outdated Trezor firmware. Please update the firmware from https://www.mytrezor.com') return self.client @hook def close_wallet(self): print_error("trezor: clear session") if self.client: self.client.clear_session() self.client.transport.close() self.client = None self.wallet = None def sign_transaction(self, tx, prev_tx, xpub_path): self.prev_tx = prev_tx self.xpub_path = xpub_path client = self.get_client() inputs = self.tx_inputs(tx, True) outputs = self.tx_outputs(tx) #try: signed_tx = client.sign_tx('Bitcoin', inputs, outputs)[1] #except Exception, e: # give_error(e) #finally: self.handler.stop() raw = signed_tx.encode('hex') tx.update_signatures(raw) def tx_inputs(self, tx, for_sig=False): inputs = [] for txin in tx.inputs: txinputtype = types.TxInputType() if txin.get('is_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 = BIP32_Account.parse_xpubkey(x_pubkey) xpub_n = self.get_client().expand_path(self.xpub_path[xpub]) txinputtype.address_n.extend(xpub_n + s) else: def f(x_pubkey): if is_extended_pubkey(x_pubkey): xpub, s = BIP32_Account.parse_xpubkey(x_pubkey) else: xpub = xpub_from_pubkey(x_pubkey.decode('hex')) s = [] node = ckd_public.deserialize(xpub) return types.HDNodePathType(node=node, address_n=s) pubkeys = map(f, x_pubkeys) multisig = types.MultisigRedeemScriptType( pubkeys=pubkeys, signatures=map(lambda x: x.decode('hex') if x else '', txin.get('signatures')), m=txin.get('num_sig'), ) txinputtype = types.TxInputType( script_type=types.SPENDMULTISIG, multisig= multisig ) # find which key is mine for x_pubkey in x_pubkeys: if is_extended_pubkey(x_pubkey): xpub, s = BIP32_Account.parse_xpubkey(x_pubkey) if xpub in self.xpub_path: xpub_n = self.get_client().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 = txin['scriptSig'].decode('hex') txinputtype.script_sig = script_sig if 'sequence' in txin: sequence = txin['sequence'] txinputtype.sequence = sequence inputs.append(txinputtype) return inputs def tx_outputs(self, tx): outputs = [] for type, address, amount in tx.outputs: assert type == 'address' txoutputtype = types.TxOutputType() if self.wallet.is_change(address): address_path = self.wallet.address_id(address) address_n = self.get_client().expand_path(address_path) txoutputtype.address_n.extend(address_n) else: txoutputtype.address = address txoutputtype.amount = amount addrtype, hash_160 = bc_address_to_hash_160(address) if addrtype == 0: txoutputtype.script_type = types.PAYTOADDRESS elif addrtype == 5: txoutputtype.script_type = types.PAYTOSCRIPTHASH else: raise BaseException('addrtype') outputs.append(txoutputtype) return outputs def electrum_tx_to_txtype(self, tx): t = 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 = vout['scriptPubKey'].decode('hex') return t def get_tx(self, tx_hash): tx = self.prev_tx[tx_hash] tx.deserialize() return self.electrum_tx_to_txtype(tx) class TrezorGuiMixin(object): def __init__(self, *args, **kwargs): super(TrezorGuiMixin, self).__init__(*args, **kwargs) def callback_ButtonRequest(self, msg): if msg.code == 3: message = "Confirm transaction outputs on Trezor device to continue" elif msg.code == 8: message = "Confirm transaction fee on Trezor device to continue" elif msg.code == 7: message = "Confirm message to sign on Trezor device to continue" elif msg.code == 10: message = "Confirm address on Trezor device to continue" else: message = "Check Trezor device to continue" self.handler.show_message(message) return proto.ButtonAck() def callback_PinMatrixRequest(self, msg): if msg.type == 1: desc = 'current PIN' elif msg.type == 2: desc = 'new PIN' elif msg.type == 3: desc = 'new PIN again' else: desc = 'PIN' pin = self.handler.get_pin("Please enter Trezor %s" % desc) if not pin: return proto.Cancel() return proto.PinMatrixAck(pin=pin) def callback_PassphraseRequest(self, req): msg = _("Please enter your Trezor passphrase.") passphrase = self.handler.get_passphrase(msg) if passphrase is None: return proto.Cancel() return proto.PassphraseAck(passphrase=passphrase) def callback_WordRequest(self, msg): #TODO log("Enter one word of mnemonic: ") word = raw_input() return proto.WordAck(word=word) if TREZOR: class QtGuiTrezorClient(ProtocolMixin, TrezorGuiMixin, BaseClient): def call_raw(self, msg): try: resp = BaseClient.call_raw(self, msg) except ConnectionError: self.bad = True raise return resp