tplugin for TrustedCoin - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit 95586643a4389d900e791aadcee7292a51373945
DIR parent 2b42f054a954aa7c10cb3f8a4c0cc399bc523104
HTML Author: ThomasV <thomasv@gitorious>
Date: Tue, 2 Sep 2014 07:47:10 +0200
plugin for TrustedCoin
Diffstat:
A plugins/trustedcoin.py | 711 +++++++++++++++++++++++++++++++
1 file changed, 711 insertions(+), 0 deletions(-)
---
DIR diff --git a/plugins/trustedcoin.py b/plugins/trustedcoin.py
t@@ -0,0 +1,711 @@
+#!/usr/bin/env python
+#
+# Electrum - Lightweight Bitcoin Client
+# Copyright (C) 2015 Thomas Voegtlin
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import threading
+import socket
+import os
+import re
+import requests
+import json
+from hashlib import sha256
+from urlparse import urljoin
+from urllib import quote
+
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+
+import electrum
+from electrum import bitcoin
+from electrum.bitcoin import *
+from electrum.mnemonic import Mnemonic
+from electrum import version
+from electrum.wallet import Wallet_2of3
+from electrum.i18n import _
+from electrum.plugins import BasePlugin, run_hook, hook
+
+from electrum_gui.qt.util import text_dialog, EnterButton, WaitingDialog
+from electrum_gui.qt.qrcodewidget import QRCodeWidget
+from electrum_gui.qt import ok_cancel_buttons, ok_cancel_buttons2, close_button
+from electrum_gui.qt.amountedit import AmountEdit
+from electrum_gui.qt.main_window import StatusBarButton
+
+from decimal import Decimal
+
+# signing_xpub is hardcoded so that the wallet can be restored from seed, without TrustedCoin's server
+signing_xpub = "xpub661MyMwAqRbcGnMkaTx2594P9EDuiEqMq25PM2aeG6UmwzaohgA6uDmNsvSUV8ubqwA3Wpste1hg69XHgjUuCD5HLcEp2QPzyV1HMrPppsL"
+billing_xpub = "xpub6DTBdtBB8qUmH5c77v8qVGVoYk7WjJNpGvutqjLasNG1mbux6KsojaLrYf2sRhXAVU4NaFuHhbD9SvVPRt1MB1MaMooRuhHcAZH1yhQ1qDU"
+
+SEED_PREFIX = version.SEED_PREFIX_2FA
+
+
+class TrustedCoinException(Exception):
+ def __init__(self, message, status_code=0):
+ Exception.__init__(self, message)
+ self.status_code = status_code
+
+class TrustedCoinCosignerClient(object):
+ def __init__(self, user_agent=None, base_url='https://api.trustedcoin.com/2/', debug=False):
+ self.base_url = base_url
+ self.debug = debug
+ self.user_agent = user_agent
+
+ def send_request(self, method, relative_url, data=None):
+ kwargs = {'headers': {}}
+ if self.user_agent:
+ kwargs['headers']['user-agent'] = self.user_agent
+ if method == 'get' and data:
+ kwargs['params'] = data
+ elif method == 'post' and data:
+ kwargs['data'] = json.dumps(data)
+ kwargs['headers']['content-type'] = 'application/json'
+ url = urljoin(self.base_url, relative_url)
+ if self.debug:
+ print '%s %s %s' % (method, url, data)
+ response = requests.request(method, url, **kwargs)
+ if self.debug:
+ print response.text
+ print
+ if response.status_code != 200:
+ message = str(response.text)
+ if response.headers.get('content-type') == 'application/json':
+ r = response.json()
+ if 'message' in r:
+ message = r['message']
+ raise TrustedCoinException(message, response.status_code)
+ if response.headers.get('content-type') == 'application/json':
+ return response.json()
+ else:
+ return response.text
+
+ def get_terms_of_service(self, billing_plan='electrum-per-tx-otp'):
+ """
+ Returns the TOS for the given billing plan as a plain/text unicode string.
+ :param billing_plan: the plan to return the terms for
+ """
+ payload = {'billing_plan': billing_plan}
+ return self.send_request('get', 'tos', payload)
+
+ def create(self, xpubkey1, xpubkey2, email, billing_plan='electrum-per-tx-otp'):
+ """
+ Creates a new cosigner resource.
+ :param xpubkey1: a bip32 extended public key (customarily the hot key)
+ :param xpubkey2: a bip32 extended public key (customarily the cold key)
+ :param email: a contact email
+ :param billing_plan: the billing plan for the cosigner
+ """
+ payload = {
+ 'email': email,
+ 'xpubkey1': xpubkey1,
+ 'xpubkey2': xpubkey2,
+ 'billing_plan': billing_plan,
+ }
+ return self.send_request('post', 'cosigner', payload)
+
+ def auth(self, id, otp):
+ """
+ Attempt to authenticate for a particular cosigner.
+ :param id: the id of the cosigner
+ :param otp: the one time password
+ """
+ payload = {'otp': otp}
+ return self.send_request('post', 'cosigner/%s/auth' % quote(id), payload)
+
+ def get(self, id):
+ """
+ Attempt to authenticate for a particular cosigner.
+ :param id: the id of the cosigner
+ :param otp: the one time password
+ """
+ return self.send_request('get', 'cosigner/%s' % quote(id))
+
+ def sign(self, id, transaction, otp):
+ """
+ Attempt to authenticate for a particular cosigner.
+ :param id: the id of the cosigner
+ :param transaction: the hex encoded [partially signed] compact transaction to sign
+ :param otp: the one time password
+ """
+ payload = {
+ 'otp': otp,
+ 'transaction': transaction
+ }
+ return self.send_request('post', 'cosigner/%s/sign' % quote(id), payload)
+
+ def transfer_credit(self, id, recipient, otp, signature_callback):
+ """
+ Tranfer a cosigner's credits to another cosigner.
+ :param id: the id of the sending cosigner
+ :param recipient: the id of the recipient cosigner
+ :param otp: the one time password (of the sender)
+ :param signature_callback: a callback that signs a text message using xpubkey1/0/0 returning a compact sig
+ """
+ payload = {
+ 'otp': otp,
+ 'recipient': recipient,
+ 'timestamp': int(time.time()),
+
+ }
+ relative_url = 'cosigner/%s/transfer' % quote(id)
+ full_url = urljoin(self.base_url, relative_url)
+ headers = {
+ 'x-signature': signature_callback(full_url + '\n' + json.dumps(payload))
+ }
+ return self.send_request('post', relative_url, payload, headers)
+
+
+server = TrustedCoinCosignerClient(user_agent="Electrum/" + version.ELECTRUM_VERSION)
+
+
+class Wallet_2fa(Wallet_2of3):
+
+ wallet_type = '2fa'
+
+ def get_action(self):
+ xpub1 = self.master_public_keys.get("x1/")
+ xpub2 = self.master_public_keys.get("x2/")
+ xpub3 = self.master_public_keys.get("x3/")
+ if xpub2 is None and not self.storage.get('use_trustedcoin'):
+ return 'show_disclaimer'
+ if xpub2 is None:
+ return 'create_extended_seed'
+ if xpub3 is None:
+ return 'create_remote_key'
+ if not self.accounts:
+ return 'create_accounts'
+
+ def make_seed(self):
+ return Mnemonic('english').make_seed(num_bits=256, prefix=SEED_PREFIX)
+
+ def estimated_fee(self, tx):
+ fee = Wallet_2of3.estimated_fee(self, tx)
+ x = run_hook('extra_fee', tx)
+ if x: fee += x
+ return fee
+
+ def get_tx_fee(self, tx):
+ fee = Wallet_2of3.get_tx_fee(self, tx)
+ x = run_hook('extra_fee', tx)
+ if x: fee += x
+ return fee
+
+
+
+class Plugin(BasePlugin):
+
+ wallet = None
+
+ def __init__(self, x, y):
+ BasePlugin.__init__(self, x, y)
+ electrum.wallet.wallet_types.append(('twofactor', '2fa', _("Wallet with two-factor authentication"), Wallet_2fa))
+ self.seed_func = lambda x: bitcoin.is_new_seed(x, SEED_PREFIX)
+ self.billing_info = None
+
+ def fullname(self):
+ return 'Two Factor Authentication'
+
+ def description(self):
+ return _("This plugin adds two-factor authentication to your wallet.") + '<br/>'\
+ + _("For more information, visit") + " <a href=\"https://api.trustedcoin.com/#/electrum-help\">https://api.trustedcoin.com/#/electrum-help</a>"
+
+ def is_available(self):
+ if self.wallet is None:
+ return True
+ if self.wallet.storage.get('wallet_type') == '2fa':
+ return True
+ return False
+
+ def requires_settings(self):
+ 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 not self.wallet:
+ return True
+ if self.wallet.storage.get('wallet_type') != '2fa':
+ return False
+ if self.wallet.master_private_keys.get('x2/'):
+ return False
+ return True
+
+ def make_long_id(self, xpub_hot, xpub_cold):
+ return bitcoin.sha256(''.join(sorted([xpub_hot, xpub_cold])))
+
+ def get_user_id(self):
+ xpub_hot = self.wallet.master_public_keys["x1/"]
+ xpub_cold = self.wallet.master_public_keys["x2/"]
+ long_id = self.make_long_id(xpub_hot, xpub_cold)
+ short_id = hashlib.sha256(long_id).hexdigest()
+ return long_id, short_id
+
+ def make_xpub(self, xpub, s):
+ _, _, _, c, cK = deserialize_xkey(xpub)
+ cK2, c2 = bitcoin._CKD_pub(cK, c, s)
+ xpub2 = ("0488B21E" + "00" + "00000000" + "00000000").decode("hex") + c2 + cK2
+ return EncodeBase58Check(xpub2)
+
+ def make_billing_address(self, num):
+ long_id, short_id = self.get_user_id()
+ xpub = self.make_xpub(billing_xpub, long_id)
+ _, _, _, c, cK = deserialize_xkey(xpub)
+ cK, c = bitcoin.CKD_pub(cK, c, num)
+ address = public_key_to_bc_address( cK )
+ return address
+
+ def enable(self):
+ if self.is_enabled():
+ self.window.show_message('Error: Two-factor authentication is already activated on this wallet')
+ return
+ self.set_enabled(True)
+ self.window.show_message('Two-factor authentication is enabled.')
+
+ def create_extended_seed(self, wallet, window):
+ seed = wallet.make_seed()
+ if not window.show_seed(seed, None):
+ return
+
+ if not window.verify_seed(seed, None, self.seed_func):
+ return
+
+ password = window.password_dialog()
+ wallet.storage.put('seed_version', wallet.seed_version, True)
+ wallet.storage.put('use_encryption', password is not None, True)
+
+ words = seed.split()
+ n = len(words)/2
+ wallet.add_cosigner_seed(' '.join(words[0:n]), 'x1/', password)
+ wallet.add_cosigner_xpub(' '.join(words[n:]), 'x2/')
+
+ msg = [
+ _('Your wallet file is:') + " %s"%os.path.abspath(wallet.storage.path),
+ _('You need to be online in order to complete the creation of your wallet.'),
+ _('If you generated your seed on an offline computer, click on "%s" to close this window, move your wallet file to an online computer and reopen it with Electrum.') % _('Close'),
+ _('If you are online, click on "%s" to continue.') % _('Next')
+ ]
+ return window.question('\n\n'.join(msg), no_label=_('Close'), yes_label=_('Next'))
+
+
+ def show_disclaimer(self, wallet, window):
+ msg = [
+ _("Two-factor authentication is a service provided by TrustedCoin.") + ' ',
+ _("It uses a multi-signature wallet, where you own 2 of 3 keys.") + ' ',
+ _("The third key is stored on a remote server that signs transactions on your behalf.") + ' ',
+ _("To use this service, you will need a smartphone with Google Authenticator.") + '\n\n',
+
+ _("A small fee will be charged on each transaction that uses the remote server.") + ' ',
+ _("You may check and modify your billing preferences once the installation is complete.") + '\n\n',
+
+ _("Note that your coins are not locked in this service.") + ' ',
+ _("You may withdraw your funds at any time and at no cost, without the remote server, by using the 'restore wallet' option with your wallet seed.") + '\n\n',
+
+ _('The next step will generate the seed of your wallet.') + ' ',
+ _('This seed will NOT be saved in your computer, and it must be stored on paper.') + ' ',
+ _('To be safe from malware, you may want to do this on an offline computer, and move your wallet later to an online computer.')
+ ]
+ icon = QPixmap(':icons/trustedcoin.png')
+ if not window.question(''.join(msg), icon=icon):
+ return False
+ self.wallet = wallet
+ self.set_enabled(True)
+ return True
+
+
+ def restore_third_key(self, wallet):
+ long_user_id, short_id = self.get_user_id()
+ xpub3 = self.make_xpub(signing_xpub, long_user_id)
+ wallet.add_master_public_key('x3/', xpub3)
+
+ @hook
+ def init_qt(self, gui):
+ self.window = gui.main_window
+ self.is_billing = False
+
+ @hook
+ def do_clear(self):
+ self.is_billing = False
+
+ @hook
+ def load_wallet(self, wallet):
+ self.wallet = wallet
+ if self.is_enabled():
+ self.trustedcoin_button = StatusBarButton( QIcon(":icons/trustedcoin.png"), _("Network"), self.settings_dialog)
+ self.window.statusBar().addPermanentWidget(self.trustedcoin_button)
+ self.xpub = self.wallet.master_public_keys.get('x1/')
+ self.user_id = self.get_user_id()[1]
+ t = threading.Thread(target=self.request_billing_info)
+ t.setDaemon(True)
+ t.start()
+
+ @hook
+ def close_wallet(self):
+ self.window.statusBar().removeWidget(self.trustedcoin_button)
+
+ @hook
+ def get_wizard_action(self, window, wallet, action):
+ if hasattr(self, action):
+ return getattr(self, action)
+
+ @hook
+ def installwizard_restore(self, window, storage):
+ if storage.get('wallet_type') != '2fa':
+ return
+
+ seed = window.enter_seed_dialog("Enter your seed", None, func=self.seed_func)
+ if not seed:
+ return
+ wallet = Wallet_2fa(storage)
+ self.wallet = wallet
+ password = window.password_dialog()
+
+ wallet.add_seed(seed, password)
+ words = seed.split()
+ n = len(words)/2
+ wallet.add_cosigner_seed(' '.join(words[0:n]), 'x1/', password)
+ wallet.add_cosigner_seed(' '.join(words[n:]), 'x2/', password)
+
+ self.restore_third_key(wallet)
+ wallet.create_main_account(password)
+ # disable plugin
+ self.set_enabled(False)
+ return wallet
+
+
+ def create_remote_key(self, wallet, window):
+ self.wallet = wallet
+ self.window = window
+
+ if wallet.storage.get('wallet_type') != '2fa':
+ raise
+ return
+
+ email = self.accept_terms_of_use(window)
+ if not email:
+ return
+
+ xpub_hot = wallet.master_public_keys["x1/"]
+ xpub_cold = wallet.master_public_keys["x2/"]
+
+ # Generate third key deterministically.
+ long_user_id, self.user_id = self.get_user_id()
+ xpub3 = self.make_xpub(signing_xpub, long_user_id)
+
+ # secret must be sent by the server
+ try:
+ r = server.create(xpub_hot, xpub_cold, email)
+ except socket.error:
+ self.window.show_message('Server not reachable, aborting')
+ return
+
+ otp_secret = r.get('otp_secret')
+ if not otp_secret:
+ self.window.show_message(_('Error'))
+ return
+
+ _xpub3 = r['xpubkey_cosigner']
+ _id = r['id']
+ try:
+ assert _id == self.user_id, ("user id error", _id, self.user_id)
+ assert xpub3 == _xpub3, ("xpub3 error", xpub3, _xpub3)
+ except Exception as e:
+ self.window.show_message(str(e))
+ return
+
+ if not self.setup_google_auth(self.window, _id, otp_secret):
+ return
+
+ self.wallet.add_master_public_key('x3/', xpub3)
+ return True
+
+
+
+ def need_server(self, tx):
+ from electrum.account import BIP32_Account
+ # Detect if the server is needed
+ long_id, short_id = self.get_user_id()
+ xpub3 = self.wallet.master_public_keys['x3/']
+ for x in tx.inputs_to_sign():
+ if x[0:2] == 'ff':
+ xpub, sequence = BIP32_Account.parse_xpubkey(x)
+ if xpub == xpub3:
+ return True
+ return False
+
+ @hook
+ def send_tx(self, tx):
+ print_error("twofactor:send_tx")
+ if self.wallet.storage.get('wallet_type') != '2fa':
+ return
+
+ if not self.need_server(tx):
+ print_error("twofactor: xpub3 not needed")
+ self.auth_code = None
+ return
+
+ self.auth_code = self.auth_dialog()
+
+ @hook
+ def before_send(self):
+ # request billing info before forming the transaction
+ self.billing_info = None
+ self.waiting_dialog = WaitingDialog(self.window, 'please wait...', self.request_billing_info)
+ self.waiting_dialog.start()
+ self.waiting_dialog.wait()
+ if self.billing_info is None:
+ self.window.show_message('Could not contact server')
+ return True
+ return False
+
+ @hook
+ def extra_fee(self, tx):
+ if self.billing_info.get('tx_remaining'):
+ return 0
+ if self.is_billing:
+ return 0
+ # trustedcoin won't charge if the total inputs is lower than their fee
+ price = int(self.price_per_tx.get(1))
+ if tx.input_value() < price:
+ print_error("not charging for this tx")
+ return 0
+ return price
+
+ @hook
+ def make_unsigned_transaction(self, tx):
+ price = self.extra_fee(tx)
+ if not price:
+ return
+ tx.outputs.append(('address', self.billing_info['billing_address'], price))
+
+ @hook
+ def sign_transaction(self, tx, password):
+ print_error("twofactor:sign")
+ if self.wallet.storage.get('wallet_type') != '2fa':
+ print_error("twofactor: aborting")
+ return
+
+ self.long_user_id, self.user_id = self.get_user_id()
+
+ if not self.auth_code:
+ return
+
+ if tx.is_complete():
+ return
+
+ tx_dict = tx.as_dict()
+ raw_tx = tx_dict["hex"]
+ try:
+ r = server.sign(self.user_id, raw_tx, self.auth_code)
+ except Exception as e:
+ tx.error = str(e)
+ return
+
+ print_error( "received answer", r)
+ if not r:
+ return
+
+ raw_tx = r.get('transaction')
+ tx.update(raw_tx)
+ print_error("twofactor: is complete", tx.is_complete())
+
+
+ def auth_dialog(self ):
+ d = QDialog(self.window)
+ d.setModal(1)
+ vbox = QVBoxLayout(d)
+ pw = AmountEdit(None, is_int = True)
+ msg = _('Please enter your Google Authenticator code')
+ vbox.addWidget(QLabel(msg))
+ grid = QGridLayout()
+ grid.setSpacing(8)
+ grid.addWidget(QLabel(_('Code')), 1, 0)
+ grid.addWidget(pw, 1, 1)
+ vbox.addLayout(grid)
+ vbox.addLayout(ok_cancel_buttons(d))
+ if not d.exec_():
+ return
+ return pw.get_amount()
+
+ def settings_widget(self, window):
+ return EnterButton(_('Settings'), self.settings_dialog)
+
+ def settings_dialog(self):
+ self.waiting_dialog = WaitingDialog(self.window, 'please wait...', self.request_billing_info, self.show_settings_dialog)
+ self.waiting_dialog.start()
+
+ def show_settings_dialog(self, success):
+ if not success:
+ self.window.show_message(_('Server not reachable.'))
+ return
+
+ d = QDialog(self.window)
+ d.setWindowTitle("TrustedCoin Information")
+ d.setMinimumSize(500, 200)
+ vbox = QVBoxLayout(d)
+ hbox = QHBoxLayout()
+
+ logo = QLabel()
+ logo.setPixmap(QPixmap(":icons/trustedcoin.png"))
+ msg = _('This wallet is protected by TrustedCoin\'s two-factor authentication.') + '<br/>'\
+ + _("For more information, visit") + " <a href=\"https://api.trustedcoin.com/#/electrum-help\">https://api.trustedcoin.com/#/electrum-help</a>"
+ label = QLabel(msg)
+ label.setOpenExternalLinks(1)
+
+ hbox.addStretch(10)
+ hbox.addWidget(logo)
+ hbox.addStretch(10)
+ hbox.addWidget(label)
+ hbox.addStretch(10)
+
+ vbox.addLayout(hbox)
+ vbox.addStretch(10)
+
+ msg = _('TrustedCoin charges a fee per co-signed transaction. You may pay on each transaction (an extra output will be added to your transaction), or you may purchase prepaid transaction using this dialog.') + '<br/>'
+ label = QLabel(msg)
+ label.setWordWrap(1)
+ vbox.addWidget(label)
+
+ vbox.addStretch(10)
+ grid = QGridLayout()
+ vbox.addLayout(grid)
+
+ v = self.price_per_tx.get(1)
+ grid.addWidget(QLabel(_("Price per transaction (not prepaid):")), 0, 0)
+ grid.addWidget(QLabel(self.window.format_amount(v) + ' ' + self.window.base_unit()), 0, 1)
+
+ i = 1
+ for k, v in sorted(self.price_per_tx.items()):
+ if k!=1:
+ grid.addWidget(QLabel("Price for %d prepaid transactions:"%k), i, 0)
+ grid.addWidget(QLabel(self.window.format_amount(v) + ' ' + self.window.base_unit()), i, 1)
+ b = QPushButton(_("Buy"))
+ grid.addWidget(b, i, 2)
+ def on_buy():
+ d.close()
+ if self.window.pluginsdialog:
+ self.window.pluginsdialog.close()
+ uri = "bitcoin:" + self.billing_info['billing_address'] + "?message=TrustedCoin Prepaid Transactions&amount="+str(Decimal(v)/100000000)
+ self.is_billing = True
+ self.window.pay_from_URI(uri)
+ self.window.payto_e.setFrozen(True)
+ self.window.message_e.setFrozen(True)
+ self.window.amount_e.setFrozen(True)
+ b.clicked.connect(on_buy)
+ i += 1
+
+ n = self.billing_info.get('tx_remaining', 0)
+ grid.addWidget(QLabel(_("Your wallet has %d prepaid transactions.")%n), i, 0)
+
+ # tranfer button
+ #def on_transfer():
+ # server.transfer_credit(self.user_id, recipient, otp, signature_callback)
+ # pass
+ #b = QPushButton(_("Transfer"))
+ #b.clicked.connect(on_transfer)
+ #grid.addWidget(b, 1, 2)
+
+ #grid.addWidget(QLabel(_("Next Billing Address:")), i, 0)
+ #grid.addWidget(QLabel(self.billing_info['billing_address']), i, 1)
+ vbox.addLayout(close_button(d))
+ d.exec_()
+
+
+ def request_billing_info(self):
+ billing_info = server.get(self.user_id)
+ billing_address = self.make_billing_address(billing_info['billing_index'])
+ assert billing_address == billing_info['billing_address']
+ self.billing_info = billing_info
+ self.price_per_tx = dict(self.billing_info['price_per_tx'])
+ return True
+
+ def accept_terms_of_use(self, window):
+ vbox = QVBoxLayout()
+ window.set_layout(vbox)
+ vbox.addWidget(QLabel(_("Terms of Service")))
+
+ tos_e = QTextEdit()
+ tos_e.setReadOnly(True)
+ vbox.addWidget(tos_e)
+
+ vbox.addWidget(QLabel(_("Please enter your e-mail address")))
+ email_e = QLineEdit()
+ vbox.addWidget(email_e)
+ vbox.addStretch()
+ hbox, accept_button = ok_cancel_buttons2(window, _('Accept'))
+ accept_button.setEnabled(False)
+ vbox.addLayout(hbox)
+
+ def request_TOS():
+ tos = server.get_terms_of_service()
+ self.TOS = tos
+ window.emit(SIGNAL('twofactor:TOS'))
+
+ def on_result():
+ tos_e.setText(self.TOS)
+
+ window.connect(window, SIGNAL('twofactor:TOS'), on_result)
+ t = threading.Thread(target=request_TOS)
+ t.setDaemon(True)
+ t.start()
+
+ regexp = r"[^@]+@[^@]+\.[^@]+"
+ email_e.textChanged.connect(lambda: accept_button.setEnabled(re.match(regexp,email_e.text()) is not None))
+ email_e.setFocus(True)
+
+ if not window.exec_():
+ return
+
+ email = str(email_e.text())
+ return email
+
+
+ def setup_google_auth(self, window, _id, otp_secret):
+ uri = "otpauth://totp/%s?secret=%s"%('trustedcoin.com', otp_secret)
+ vbox = QVBoxLayout()
+ window.set_layout(vbox)
+ vbox.addWidget(QLabel("Please scan this QR code in Google Authenticator."))
+ qrw = QRCodeWidget(uri)
+ vbox.addWidget(qrw, 1)
+ #vbox.addWidget(QLabel(data), 0, Qt.AlignHCenter)
+
+ hbox = QHBoxLayout()
+ msg = _('Then, enter your Google Authenticator code:')
+ hbox.addWidget(QLabel(msg))
+ pw = AmountEdit(None, is_int = True)
+ pw.setFocus(True)
+ hbox.addWidget(pw)
+ hbox.addStretch(1)
+ vbox.addLayout(hbox)
+
+ hbox, b = ok_cancel_buttons2(window, _('Next'))
+ b.setEnabled(False)
+ vbox.addLayout(hbox)
+ pw.textChanged.connect(lambda: b.setEnabled(len(pw.text())==6))
+
+ window.exec_()
+ otp = pw.get_amount()
+ try:
+ server.auth(_id, otp)
+ except:
+ self.window.show_message('Incorrect password, aborting')
+ return
+
+ return True
+
+