trezor plugin

gui/qt/main_window.py

@@ -1058,7 +1058,7 @@ class ElectrumWindow(QMainWindow):
             return
 
         # call hook to see if plugin needs gui interaction
-        run_hook('send_tx', tx)
+        run_hook('send_tx', tx, self.wallet)
 
         # sign the tx
         def sign_thread():

gui/qt/password_dialog.py

@@ -23,7 +23,7 @@ from util import *
 
 
 
-def make_password_dialog(self, wallet, msg):
+def make_password_dialog(self, wallet, msg, new_pass=True):
 
     self.pw = QLineEdit()
     self.pw.setEchoMode(2)
@@ -59,7 +59,7 @@ def make_password_dialog(self, wallet, msg):
         grid.addWidget(QLabel(_('Password')), 0, 0)
         grid.addWidget(self.pw, 0, 1)
 
-    grid.addWidget(QLabel(_('New Password')), 1, 0)
+    grid.addWidget(QLabel(_('New Password' if new_pass else 'Password')), 1, 0)
     grid.addWidget(self.new_pw, 1, 1)
 
     grid.addWidget(QLabel(_('Confirm Password')), 2, 0)

lib/transaction.py

@@ -439,7 +439,7 @@ def parse_input(vds):
     d = {}
     prevout_hash = hash_encode(vds.read_bytes(32))
     prevout_n = vds.read_uint32()
-    scriptSig = vds.read_bytes(vds.read_compact_size())
+    d['scriptSig'] = scriptSig = vds.read_bytes(vds.read_compact_size())
     sequence = vds.read_uint32()
     if prevout_hash == '00'*32:
         d['is_coinbase'] = True

plugins/trezor.py

@@ -0,0 +1,322 @@
+from PyQt4.Qt import QMessageBox, QDialog, QVBoxLayout, QLabel
+from binascii import unhexlify
+from struct import pack
+from sys import stderr
+
+from gui.qt.password_dialog import make_password_dialog, run_password_dialog
+from gui.qt.util import ok_cancel_buttons
+from lib.account import BIP32_Account
+from lib.bitcoin import EncodeBase58Check
+from lib.i18n import _
+from lib.plugins import BasePlugin
+from lib.transaction import deserialize
+from lib.wallet import NewWallet
+
+
+try:
+    import cmdtr
+    from trezorlib.client import types
+    from trezorlib.client import proto, BaseClient, ProtocolMixin
+    from trezorlib.pinmatrix import PinMatrixWidget
+    from trezorlib.transport import ConnectionError
+    TREZOR = True
+except: TREZOR = False
+
+def log(msg):
+    stderr.write("%s\n" % msg)
+    stderr.flush()
+
+
+class Plugin(BasePlugin):
+
+    def fullname(self): return 'Trezor Wallet'
+
+    def description(self): return 'Provides support for Trezor hardware wallet\n\nRequires github.com/trezor/python-trezor'
+
+    def __init__(self, gui, name):
+        BasePlugin.__init__(self, gui, name)
+        self._is_available = self._init()
+
+    def _init(self):
+        return TREZOR
+
+    def is_available(self):
+        return self._is_available
+
+    def enable(self):
+        return BasePlugin.enable(self)
+
+    def add_wallet_types(self, wallet_types):
+        wallet_types.append(('trezor', _("Trezor wallet"), TrezorWallet))
+
+    def send_tx(self, tx, wallet):
+        try:
+            wallet.sign_transaction(tx, None, None)
+        except Exception as e:
+            tx.error = str(e)
+
+
+class TrezorWallet(NewWallet):
+
+    def __init__(self, storage):
+        self.transport = None
+        self.client = None
+
+        NewWallet.__init__(self, storage)
+
+        self.seed = 'trezor'
+        
+        self.storage.put('gap_limit', 20, False)    #obey BIP44 gap limit of 20
+
+        self.use_encryption = False
+
+        self.storage.put('seed', self.seed, False)
+        self.storage.put('seed_version', self.seed_version, False)
+        self.storage.put('use_encryption', self.use_encryption, False)
+
+        self.device_checked = False
+
+    def get_action(self):
+        if not self.accounts:
+            return 'create_accounts'
+
+    def can_create_accounts(self):
+        return True
+
+    def is_watching_only(self):
+        return False
+
+    def default_account(self):
+        return "44'/0'/0'"
+
+    def get_client(self):
+        if not TREZOR:
+            raise Exception('please install github.com/trezor/python-trezor')
+
+        if not self.client or self.client.bad:
+            self.transport = cmdtr.get_transport('usb', '')
+            self.client = QtGuiTrezorClient(self.transport)
+            self.client.set_tx_api(self)
+            #self.client.clear_session()# TODO Doesn't work with firmware 1.1, returns proto.Failure
+            self.client.bad = False
+            self.device_checked = False
+            self.proper_device = False
+        return self.client
+
+    def account_id(self, i):
+        return "44'/0'/%d'"%i
+
+    def address_id(self, address):
+        account_id, (change, address_index) = self.get_address_index(address)
+        return "%s/%d/%d" % (account_id, change, address_index)
+
+    def create_accounts(self, password):
+        self.create_account('Main account', '') #name, empty password
+
+    def make_account(self, account_id, password):
+        xpub = self.get_public_key(account_id)
+        self.add_master_public_key(account_id, xpub)
+        account = BIP32_Account({'xpub':xpub})
+        return account
+
+    def get_public_key(self, bip32_path):
+        address_n = self.get_client().expand_path(bip32_path)
+        res = self.get_client().get_public_node(address_n)
+        xpub = "0488B21E".decode('hex') + chr(res.depth) + self.i4b(res.fingerprint) + self.i4b(res.child_num) + res.chain_code + res.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 sign_transaction(self, tx, keypairs, password):
+        if tx.error or tx.is_complete():
+            return
+
+        if not self.check_proper_device():
+            raise Exception('Wrong device or password')
+
+        inputs = self.tx_inputs(tx)
+        outputs = self.tx_outputs(tx)
+        signed_tx = self.get_client().sign_tx('Bitcoin', inputs, outputs)[1]
+        raw = signed_tx.encode('hex')
+        tx.update(raw)
+
+    def tx_inputs(self, tx):
+        inputs = []
+
+        for txinput in tx.inputs:
+            txinputtype = types.TxInputType()
+            address = txinput['address']
+            try:
+                address_path = self.address_id(address)
+                address_n = self.get_client().expand_path(address_path)
+                txinputtype.address_n.extend(address_n)
+            except: pass
+
+            if ('is_coinbase' in txinput and txinput['is_coinbase']):
+                prev_hash = "\0"*32
+                prev_index = 0xffffffff # signed int -1               
+            else:        
+                prev_hash = unhexlify(txinput['prevout_hash'])
+                prev_index = txinput['prevout_n']
+
+            txinputtype.prev_hash = prev_hash
+            txinputtype.prev_index = prev_index
+
+            if 'scriptSig' in txinput:
+                script_sig = txinput['scriptSig']
+                txinputtype.script_sig = script_sig
+
+            if 'sequence' in txinput:
+                sequence = txinput['sequence']
+                txinputtype.sequence = sequence
+
+            inputs.append(txinputtype)
+            #TODO P2SH
+        return inputs
+
+    def tx_outputs(self, tx):
+        outputs = []
+
+        for type, address, amount in tx.outputs:
+            txoutputtype = types.TxOutputType()
+
+            if self.is_change(address):
+                address_path = self.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
+
+            txoutputtype.script_type = types.PAYTOADDRESS
+            #TODO
+            #if output['is_p2sh']:
+            #    txoutputtype.script_type = types.PAYTOSCRIPTHASH
+
+            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.transactions[tx_hash]
+        return self.electrum_tx_to_txtype(tx)
+
+    def check_proper_device(self):
+        self.get_client().ping('t')
+        if not self.device_checked:
+            address = self.addresses(False, 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
+
+            if device_address != address:
+                self.proper_device = False
+            else:
+                self.proper_device = True
+
+        return self.proper_device
+
+
+class TrezorQtGuiMixin(object):
+
+    def __init__(self, *args, **kwargs):
+        super(TrezorQtGuiMixin, self).__init__(*args, **kwargs)
+
+    def callback_ButtonRequest(self, msg):
+        i = QMessageBox.question(None, _('Trezor'), _("Please check request on Trezor's screen"), _('OK'), _('Cancel'))
+        if i == 0:
+            return proto.ButtonAck()
+        return proto.Cancel()    
+
+    def callback_PinMatrixRequest(self, msg):
+        if msg.type == 1:
+            desc = 'old PIN'
+        elif msg.type == 2:
+            desc = 'new PIN'
+        elif msg.type == 3:
+            desc = 'new PIN again'
+        else:
+            desc = 'PIN'
+
+        pin = self.pin_dialog(msg="Please enter Trezor %s" % desc)
+        if not pin:
+            return proto.Cancel()
+        return proto.PinMatrixAck(pin=pin)
+
+    def callback_PassphraseRequest(self, msg):
+        confirmed, p, passphrase = self.password_dialog()
+        if not confirmed:
+            QMessageBox.critical(None, _('Error'), _("Password request canceled"), _('OK'))
+            return proto.Cancel()
+        if passphrase is None:
+            passphrase='' # Even blank string is valid Trezor passphrase
+        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)
+
+    def password_dialog(self, msg=None):
+        if not msg:
+            msg = _("Please enter your Trezor password")
+        else:
+            msg = _(msg)
+        d = QDialog()
+        d.setModal(1)
+        d.setLayout( make_password_dialog(d, None, msg, False) )
+        return run_password_dialog(d, None, None)
+
+    def pin_dialog(self, msg):
+        d = QDialog(None)
+        d.setModal(1)
+        d.setWindowTitle(_("Enter PIN"))
+        matrix = PinMatrixWidget()
+
+        vbox = QVBoxLayout()
+        vbox.addWidget(QLabel(msg))
+        vbox.addWidget(matrix)
+        vbox.addLayout(ok_cancel_buttons(d))
+        d.setLayout(vbox)
+
+        if not d.exec_(): return
+        return str(matrix.get_value())
+
+if TREZOR:
+    class QtGuiTrezorClient(ProtocolMixin, TrezorQtGuiMixin, BaseClient):
+        def call_raw(self, msg):
+            try:
+                resp = BaseClient.call_raw(self, msg)
+            except ConnectionError:
+                self.bad = True
+                raise
+    
+            return resp