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import threading
from PyQt4.Qt import (QDialog, QInputDialog, QLineEdit, QTextEdit, QVBoxLayout, QLabel, SIGNAL)
import PyQt4.QtCore as QtCore
from electrum.i18n import _
from electrum_gui.qt.util import *
from electrum.util import print_msg
import os, hashlib, websocket, threading, logging, json, copy
from electrum_gui.qt.qrcodewidget import QRCodeWidget, QRDialog
from btchip.btchip import *
DEBUG = False
helpTxt = [_("Your Ledger Wallet wants tell you a one-time PIN code.<br><br>" \
"For best security you should unplug your device, open a text editor on another computer, " \
"put your cursor into it, and plug your device into that computer. " \
"It will output a summary of the transaction being signed and a one-time PIN.<br><br>" \
"Verify the transaction summary and type the PIN code here.<br><br>" \
"Before pressing enter, plug the device back into this computer.<br>" ),
_("Verify the address below.<br>Type the character from your security card corresponding to the <u><b>BOLD</b></u> character."),
_("Waiting for authentication on your mobile phone"),
_("Transaction accepted by mobile phone. Waiting for confirmation."),
_("Click Pair button to begin pairing a mobile phone."),
_("Scan this QR code with your LedgerWallet phone app to pair it with this Ledger device.<br>"
"To complete pairing you will need your security card to answer a challenge." )
]
class LedgerAuthDialog(QDialog):
def __init__(self, handler, data):
'''Ask user for 2nd factor authentication. Support text, security card and paired mobile methods.
Use last method from settings, but support new pairing and downgrade.
'''
QDialog.__init__(self, handler.top_level_window())
self.handler = handler
self.txdata = data
self.idxs = self.txdata['keycardData'] if self.txdata['confirmationType'] > 1 else ''
self.setMinimumWidth(600)
self.setWindowTitle(_("Ledger Wallet Authentication"))
self.cfg = copy.deepcopy(self.handler.win.wallet.get_keystore().cfg)
self.dongle = self.handler.win.wallet.get_keystore().get_client().dongle
self.ws = None
self.pin = ''
self.devmode = self.getDevice2FAMode()
if self.devmode == 0x11 or self.txdata['confirmationType'] == 1:
self.cfg['mode'] = 0
vbox = QVBoxLayout()
self.setLayout(vbox)
def on_change_mode(idx):
if idx < 2 and self.ws:
self.ws.stop()
self.ws = None
self.cfg['mode'] = 0 if self.devmode == 0x11 else idx if idx > 0 else 1
if self.cfg['mode'] > 1 and self.cfg['pair'] and not self.ws:
self.req_validation()
if self.cfg['mode'] > 0:
self.handler.win.wallet.get_keystore().cfg = self.cfg
self.handler.win.wallet.save_keystore()
self.update_dlg()
def add_pairing():
self.do_pairing()
def return_pin():
self.pin = self.pintxt.text() if self.txdata['confirmationType'] == 1 else self.cardtxt.text()
if self.cfg['mode'] == 1:
self.pin = ''.join(chr(int(str(i),16)) for i in self.pin)
self.accept()
self.modebox = QWidget()
modelayout = QHBoxLayout()
self.modebox.setLayout(modelayout)
modelayout.addWidget(QLabel(_("Method:")))
self.modes = QComboBox()
modelayout.addWidget(self.modes, 2)
self.addPair = QPushButton(_("Pair"))
self.addPair.setMaximumWidth(60)
modelayout.addWidget(self.addPair)
modelayout.addStretch(1)
self.modebox.setMaximumHeight(50)
vbox.addWidget(self.modebox)
self.populate_modes()
self.modes.currentIndexChanged.connect(on_change_mode)
self.addPair.clicked.connect(add_pairing)
self.helpmsg = QTextEdit()
self.helpmsg.setStyleSheet("QTextEdit { background-color: lightgray; }")
self.helpmsg.setReadOnly(True)
vbox.addWidget(self.helpmsg)
self.pinbox = QWidget()
pinlayout = QHBoxLayout()
self.pinbox.setLayout(pinlayout)
self.pintxt = QLineEdit()
self.pintxt.setEchoMode(2)
self.pintxt.setMaxLength(4)
self.pintxt.returnPressed.connect(return_pin)
pinlayout.addWidget(QLabel(_("Enter PIN:")))
pinlayout.addWidget(self.pintxt)
pinlayout.addWidget(QLabel(_("NOT DEVICE PIN - see above")))
pinlayout.addStretch(1)
self.pinbox.setVisible(self.cfg['mode'] == 0)
vbox.addWidget(self.pinbox)
self.cardbox = QWidget()
card = QVBoxLayout()
self.cardbox.setLayout(card)
self.addrtext = QTextEdit()
self.addrtext.setStyleSheet("QTextEdit { color:blue; background-color:lightgray; padding:15px 10px; border:none; font-size:20pt; }")
self.addrtext.setReadOnly(True)
self.addrtext.setMaximumHeight(120)
card.addWidget(self.addrtext)
def pin_changed(s):
if len(s) < len(self.idxs):
i = self.idxs[len(s)]
addr = self.txdata['address']
addr = addr[:i] + '<u><b>' + addr[i:i+1] + '</u></b>' + addr[i+1:]
self.addrtext.setHtml(str(addr))
else:
self.addrtext.setHtml(_("Press Enter"))
pin_changed('')
cardpin = QHBoxLayout()
cardpin.addWidget(QLabel(_("Enter PIN:")))
self.cardtxt = QLineEdit()
self.cardtxt.setEchoMode(2)
self.cardtxt.setMaxLength(len(self.idxs))
self.cardtxt.textChanged.connect(pin_changed)
self.cardtxt.returnPressed.connect(return_pin)
cardpin.addWidget(self.cardtxt)
cardpin.addWidget(QLabel(_("NOT DEVICE PIN - see above")))
cardpin.addStretch(1)
card.addLayout(cardpin)
self.cardbox.setVisible(self.cfg['mode'] == 1)
vbox.addWidget(self.cardbox)
self.pairbox = QWidget()
pairlayout = QVBoxLayout()
self.pairbox.setLayout(pairlayout)
pairhelp = QTextEdit(helpTxt[5])
pairhelp.setStyleSheet("QTextEdit { background-color: lightgray; }")
pairhelp.setReadOnly(True)
pairlayout.addWidget(pairhelp, 1)
self.pairqr = QRCodeWidget()
pairlayout.addWidget(self.pairqr, 4)
self.pairbox.setVisible(False)
vbox.addWidget(self.pairbox)
self.update_dlg()
if self.cfg['mode'] > 1 and not self.ws:
self.req_validation()
def populate_modes(self):
self.modes.blockSignals(True)
self.modes.clear()
self.modes.addItem(_("Summary Text PIN (requires dongle replugging)") if self.txdata['confirmationType'] == 1 else _("Summary Text PIN is Disabled"))
if self.txdata['confirmationType'] > 1:
self.modes.addItem(_("Security Card Challenge"))
if not self.cfg['pair']:
self.modes.addItem(_("Mobile - Not paired"))
else:
self.modes.addItem(_("Mobile - %s") % self.cfg['pair'][1])
self.modes.blockSignals(False)
def update_dlg(self):
self.modes.setCurrentIndex(self.cfg['mode'])
self.modebox.setVisible(True)
self.addPair.setText(_("Pair") if not self.cfg['pair'] else _("Re-Pair"))
self.addPair.setVisible(self.txdata['confirmationType'] > 2)
self.helpmsg.setText(helpTxt[self.cfg['mode'] if self.cfg['mode'] < 2 else 2 if self.cfg['pair'] else 4])
self.helpmsg.setMinimumHeight(180 if self.txdata['confirmationType'] == 1 else 100)
self.pairbox.setVisible(False)
self.helpmsg.setVisible(True)
self.pinbox.setVisible(self.cfg['mode'] == 0)
self.cardbox.setVisible(self.cfg['mode'] == 1)
self.pintxt.setFocus(True) if self.cfg['mode'] == 0 else self.cardtxt.setFocus(True)
self.setMaximumHeight(200)
def do_pairing(self):
rng = os.urandom(16)
pairID = rng.encode('hex') + hashlib.sha256(rng).digest()[0].encode('hex')
self.pairqr.setData(pairID)
self.modebox.setVisible(False)
self.helpmsg.setVisible(False)
self.pinbox.setVisible(False)
self.cardbox.setVisible(False)
self.pairbox.setVisible(True)
self.pairqr.setMinimumSize(300,300)
if self.ws:
self.ws.stop()
self.ws = LedgerWebSocket(self, pairID)
self.ws.pairing_done.connect(self.pairing_done)
self.ws.start()
def pairing_done(self, data):
if data is not None:
self.cfg['pair'] = [ data['pairid'], data['name'], data['platform'] ]
self.cfg['mode'] = 2
self.handler.win.wallet.get_keystore().cfg = self.cfg
self.handler.win.wallet.save_keystore()
self.pin = 'paired'
self.accept()
def req_validation(self):
if self.cfg['pair'] and 'secureScreenData' in self.txdata:
if self.ws:
self.ws.stop()
self.ws = LedgerWebSocket(self, self.cfg['pair'][0], self.txdata)
self.ws.req_updated.connect(self.req_updated)
self.ws.start()
def req_updated(self, pin):
if pin == 'accepted':
self.helpmsg.setText(helpTxt[3])
else:
self.pin = str(pin)
self.accept()
def getDevice2FAMode(self):
apdu = [0xe0, 0x24, 0x01, 0x00, 0x00, 0x01] # get 2fa mode
try:
mode = self.dongle.exchange( bytearray(apdu) )
return mode
except BTChipException, e:
debug_msg('Device getMode Failed')
return 0x11
def closeEvent(self, evnt):
debug_msg("CLOSE - Stop WS")
if self.ws:
self.ws.stop()
if self.pairbox.isVisible():
evnt.ignore()
self.update_dlg()
class LedgerWebSocket(QThread):
pairing_done = pyqtSignal(object)
req_updated = pyqtSignal(str)
def __init__(self, dlg, pairID, txdata=None):
QThread.__init__(self)
self.stopping = False
self.pairID = pairID
self.txreq = '{"type":"request","second_factor_data":"' + str(txdata['secureScreenData']).encode('hex') + '"}' if txdata else None
self.dlg = dlg
self.dongle = self.dlg.dongle
self.data = None
#websocket.enableTrace(True)
logging.basicConfig(level=logging.INFO)
self.ws = websocket.WebSocketApp('wss://ws.ledgerwallet.com/2fa/channels',
on_message = self.on_message, on_error = self.on_error,
on_close = self.on_close, on_open = self.on_open)
def run(self):
while not self.stopping:
self.ws.run_forever()
def stop(self):
debug_msg("WS: Stopping")
self.stopping = True
self.ws.close()
def on_message(self, ws, msg):
data = json.loads(msg)
if data['type'] == 'identify':
debug_msg('Identify')
apdu = [0xe0, 0x12, 0x01, 0x00, 0x41] # init pairing
apdu.extend(data['public_key'].decode('hex'))
try:
challenge = self.dongle.exchange( bytearray(apdu) )
ws.send( '{"type":"challenge","data":"%s" }' % str(challenge).encode('hex') )
self.data = data
except BTChipException, e:
debug_msg('Identify Failed')
if data['type'] == 'challenge':
debug_msg('Challenge')
apdu = [0xe0, 0x12, 0x02, 0x00, 0x10] # confirm pairing
apdu.extend(data['data'].decode('hex'))
try:
self.dongle.exchange( bytearray(apdu) )
debug_msg('Pairing Successful')
ws.send( '{"type":"pairing","is_successful":"true"}' )
self.data['pairid'] = self.pairID
self.pairing_done.emit(self.data)
except BTChipException, e:
debug_msg('Pairing Failed')
ws.send( '{"type":"pairing","is_successful":"false"}' )
self.pairing_done.emit(None)
ws.send( '{"type":"disconnect"}' )
self.stopping = True
ws.close()
if data['type'] == 'accept':
debug_msg('Accepted')
self.req_updated.emit('accepted')
if data['type'] == 'response':
debug_msg('Responded', data)
self.req_updated.emit(str(data['pin']) if data['is_accepted'] else '')
self.txreq = None
self.stopping = True
ws.close()
if data['type'] == 'repeat':
debug_msg('Repeat')
if self.txreq:
ws.send( self.txreq )
debug_msg("Req Sent", self.txreq)
if data['type'] == 'connect':
debug_msg('Connected')
if self.txreq:
ws.send( self.txreq )
debug_msg("Req Sent", self.txreq)
if data['type'] == 'disconnect':
debug_msg('Disconnected')
ws.close()
def on_error(self, ws, error):
message = getattr(error, 'strerror', '')
if not message:
message = getattr(error, 'message', '')
debug_msg("WS: %s" % message)
def on_close(self, ws):
debug_msg("WS: ### socket closed ###")
def on_open(self, ws):
debug_msg("WS: ### socket open ###")
debug_msg("Joining with pairing ID", self.pairID)
ws.send( '{"type":"join","room":"%s"}' % self.pairID )
ws.send( '{"type":"repeat"}' )
if self.txreq:
ws.send( self.txreq )
debug_msg("Req Sent", self.txreq)
def debug_msg(*args):
if DEBUG:
print_msg(*args)