kivy: request PIN code on startup

gui/kivy/main.kv

@@ -285,7 +285,8 @@
 
 <KButton@Button>:
     size_hint: 1, None
-    height: '48dp'
+    height: '60dp'
+    font_size: '30dp'
     on_release:
         self.parent.update_amount(self.text)
 

gui/kivy/main_window.py

@@ -244,6 +244,7 @@ class ElectrumWindow(App):
         self.tabs = None
         self.is_exit = False
         self.wallet = None
+        self.pause_time = 0
 
         App.__init__(self)#, **kwargs)
 
@@ -445,7 +446,6 @@ class ElectrumWindow(App):
         #win.softinput_mode = 'below_target'
         self.on_size(win, win.size)
         self.init_ui()
-        self.load_wallet_by_name(self.electrum_config.get_wallet_path())
         # init plugins
         run_hook('init_kivy', self)
         # fiat currency
@@ -467,6 +467,8 @@ class ElectrumWindow(App):
             self.network.register_callback(self.on_fee, ['fee'])
             self.network.register_callback(self.on_quotes, ['on_quotes'])
             self.network.register_callback(self.on_history, ['on_history'])
+        # load wallet
+        self.load_wallet_by_name(self.electrum_config.get_wallet_path())
         # URI passed in config
         uri = self.electrum_config.get('url')
         if uri:
@@ -484,17 +486,18 @@ class ElectrumWindow(App):
             wallet.start_threads(self.daemon.network)
             self.daemon.add_wallet(wallet)
             self.load_wallet(wallet)
-        self.on_resume()
 
     def load_wallet_by_name(self, path):
         if not path:
             return
+        if self.wallet and self.wallet.storage.path == path:
+            return
         wallet = self.daemon.load_wallet(path, None)
         if wallet:
-            if wallet != self.wallet:
+            if wallet.has_password():
-                self.stop_wallet()
+                self.password_dialog(wallet, _('Enter PIN code'), lambda x: self.load_wallet(wallet), self.stop)
+            else:
                 self.load_wallet(wallet)
-                self.on_resume()
         else:
             Logger.debug('Electrum: Wallet not found. Launching install wizard')
             storage = WalletStorage(path)
@@ -504,6 +507,7 @@ class ElectrumWindow(App):
             wizard.run(action)
 
     def on_stop(self):
+        Logger.info('on_stop')
         self.stop_wallet()
 
     def stop_wallet(self):
@@ -617,6 +621,8 @@ class ElectrumWindow(App):
 
     @profiler
     def load_wallet(self, wallet):
+        if self.wallet:
+            self.stop_wallet()
         self.wallet = wallet
         self.update_wallet()
         # Once GUI has been initialized check if we want to announce something
@@ -625,6 +631,7 @@ class ElectrumWindow(App):
             self.receive_screen.clear()
         self.update_tabs()
         run_hook('load_wallet', wallet, self)
+        print('load wallet done', self.wallet)
 
     def update_status(self, *dt):
         self.num_blocks = self.network.get_local_height()
@@ -684,12 +691,16 @@ class ElectrumWindow(App):
             Logger.Error('Notification: needs plyer; `sudo pip install plyer`')
 
     def on_pause(self):
+        self.pause_time = time.time()
         # pause nfc
         if self.nfcscanner:
             self.nfcscanner.nfc_disable()
         return True
 
     def on_resume(self):
+        now = time.time()
+        if self.wallet.has_password and now - self.pause_time > 60:
+            self.password_dialog(self.wallet, _('Enter PIN'), None, self.stop)
         if self.nfcscanner:
             self.nfcscanner.nfc_enable()
 
@@ -875,7 +886,8 @@ class ElectrumWindow(App):
 
     def protected(self, msg, f, args):
         if self.wallet.has_password():
-            self.password_dialog(msg, f, args)
+            on_success = lambda pw: f(*(args + (pw,)))
+            self.password_dialog(self.wallet, msg, on_success, lambda: None)
         else:
             f(*(args + (None,)))
 
@@ -887,7 +899,7 @@ class ElectrumWindow(App):
 
     def _delete_wallet(self, b):
         if b:
-            basename = os.path.basename(self.wallet.storage.path)
+            basename = self.wallet.basename()
             self.protected(_("Enter your PIN code to confirm deletion of {}").format(basename), self.__delete_wallet, ())
 
     def __delete_wallet(self, pw):
@@ -925,40 +937,23 @@ class ElectrumWindow(App):
         if passphrase:
             label.text += '\n\n' + _('Passphrase') + ': ' + passphrase
 
-    def change_password(self, cb):
+    def password_dialog(self, wallet, msg, on_success, on_failure):
-        if self.wallet.has_password():
+        from .uix.dialogs.password_dialog import PasswordDialog
-            self.protected(_("Changing PIN code.") + '\n' + _("Enter your current PIN:"), self._change_password, (cb,))
+        if self._password_dialog is None:
-        else:
+            self._password_dialog = PasswordDialog()
-            self._change_password(cb, None)
+        self._password_dialog.init(self, wallet, msg, on_success, on_failure)
-
+        self._password_dialog.open()
-    def _change_password(self, cb, old_password):
-        if self.wallet.has_password():
-            if old_password is None:
-                return
-            try:
-                self.wallet.check_password(old_password)
-            except InvalidPassword:
-                self.show_error("Invalid PIN")
-                return
-        self.password_dialog(_('Enter new PIN'), self._change_password2, (cb, old_password,))
-
-    def _change_password2(self, cb, old_password, new_password):
-        self.password_dialog(_('Confirm new PIN'), self._change_password3, (cb, old_password, new_password))
-
-    def _change_password3(self, cb, old_password, new_password, confirmed_password):
-        if new_password == confirmed_password:
-            self.wallet.update_password(old_password, new_password)
-            cb()
-        else:
-            self.show_error("PIN numbers do not match")
 
-    def password_dialog(self, msg, f, args):
+    def change_password(self, cb):
         from .uix.dialogs.password_dialog import PasswordDialog
-        def callback(pw):
-            Clock.schedule_once(lambda x: f(*(args + (pw,))), 0.1)
         if self._password_dialog is None:
             self._password_dialog = PasswordDialog()
-        self._password_dialog.init(msg, callback)
+        message = _("Changing PIN code.") + '\n' + _("Enter your current PIN:")
+        def on_success(old_password, new_password):
+            self.wallet.update_password(old_password, new_password)
+            self.show_info(_("Your PIN code was updated"))
+        on_failure = lambda: self.show_error(_("PIN codes do not match"))
+        self._password_dialog.init(self, self.wallet, message, on_success, on_failure, is_change=1)
         self._password_dialog.open()
 
     def export_private_keys(self, pk_label, addr):

gui/kivy/uix/dialogs/installwizard.py

@@ -802,28 +802,18 @@ class InstallWizard(BaseWizard, Widget):
         app = App.get_running_app()
         Clock.schedule_once(lambda dt: app.show_error(msg))
 
-    def password_dialog(self, message, callback):
+    def request_password(self, run_next, force_disable_encrypt_cb=False):
+        def on_success(old_pin, pin):
+            assert old_pin is None
+            run_next(pin, False)
+        def on_failure():
+            self.show_error(_('PIN mismatch'))
+            self.run('request_password', run_next)
         popup = PasswordDialog()
-        popup.init(message, callback)
+        app = App.get_running_app()
+        popup.init(app, None, _('Choose PIN code'), on_success, on_failure, is_change=2)
         popup.open()
 
-    def request_password(self, run_next, force_disable_encrypt_cb=False):
-        def callback(pin):
-            if pin:
-                self.run('confirm_password', pin, run_next)
-            else:
-                run_next(None, None)
-        self.password_dialog('Choose a PIN code', callback)
-
-    def confirm_password(self, pin, run_next):
-        def callback(conf):
-            if conf == pin:
-                run_next(pin, False)
-            else:
-                self.show_error(_('PIN mismatch'))
-                self.run('request_password', run_next)
-        self.password_dialog('Confirm your PIN code', callback)
-
     def action_dialog(self, action, run_next):
         f = getattr(self, action)
         f()

gui/kivy/uix/dialogs/password_dialog.py

@@ -5,35 +5,42 @@ from kivy.lang import Builder
 from decimal import Decimal
 from kivy.clock import Clock
 
+from electrum.util import InvalidPassword
+from electrum_gui.kivy.i18n import _
+
 Builder.load_string('''
 
 <PasswordDialog@Popup>
     id: popup
-    title: _('PIN Code')
+    title: 'Electrum'
     message: ''
-    size_hint: 0.9, 0.9
     BoxLayout:
+        size_hint: 1, 1
         orientation: 'vertical'
         Widget:
-            size_hint: 1, 1
+            size_hint: 1, 0.05
         Label:
+            font_size: '20dp'
             text: root.message
             text_size: self.width, None
             size: self.texture_size
         Widget:
-            size_hint: 1, 1
+            size_hint: 1, 0.05
         Label:
             id: a
-            text: ' * '*len(kb.password) + ' o '*(6-len(kb.password))
+            font_size: '50dp'
+            text: '*'*len(kb.password) + '-'*(6-len(kb.password))
+            size: self.texture_size
         Widget:
-            size_hint: 1, 1
+            size_hint: 1, 0.05
         GridLayout:
             id: kb
+            size_hint: 1, None
+            height: self.minimum_height
             update_amount: popup.update_password
             password: ''
             on_password: popup.on_password(self.password)
-            size_hint: 1, None
+            spacing: '2dp'
-            height: '200dp'
             cols: 3
             KButton:
                 text: '1'
@@ -59,30 +66,44 @@ Builder.load_string('''
                 text: '0'
             KButton:
                 text: '<'
-        BoxLayout:
-            size_hint: 1, None
-            height: '48dp'
-            Widget:
-                size_hint: 0.5, None
-            Button:
-                size_hint: 0.5, None
-                height: '48dp'
-                text: _('Cancel')
-                on_release:
-                    popup.dismiss()
-                    popup.callback(None)
 ''')
 
 
 class PasswordDialog(Factory.Popup):
 
-    #def __init__(self, message, callback):
+    def init(self, app, wallet, message, on_success, on_failure, is_change=0):
-    #    Factory.Popup.__init__(self)
+        self.app = app
-
+        self.wallet = wallet
-    def init(self, message, callback):
         self.message = message
-        self.callback = callback
+        self.on_success = on_success
+        self.on_failure = on_failure
         self.ids.kb.password = ''
+        self.success = False
+        self.is_change = is_change
+        self.pw = None
+        self.new_password = None
+        self.title = 'Electrum' + ('  -  ' + self.wallet.basename() if self.wallet else '')
+
+    def check_password(self, password):
+        if self.is_change > 1:
+            return True
+        try:
+            self.wallet.check_password(password)
+            return True
+        except InvalidPassword as e:
+            return False
+
+    def on_dismiss(self):
+        if not self.success:
+            if self.on_failure:
+                self.on_failure()
+            else:
+                # keep dialog open
+                return True
+        else:
+            if self.on_success:
+                args = (self.pw, self.new_password) if self.is_change else (self.pw,)
+                Clock.schedule_once(lambda dt: self.on_success(*args), 0.1)
 
     def update_password(self, c):
         kb = self.ids.kb
@@ -97,5 +118,25 @@ class PasswordDialog(Factory.Popup):
 
     def on_password(self, pw):
         if len(pw) == 6:
-            self.dismiss()
+            if self.check_password(pw):
-            Clock.schedule_once(lambda dt: self.callback(pw), 0.1)
+                if self.is_change == 0:
+                    self.success = True
+                    self.pw = pw
+                    self.message = _('Please wait...')
+                    self.dismiss()
+                elif self.is_change == 1:
+                    self.pw = pw
+                    self.message = _('Enter new PIN')
+                    self.ids.kb.password = ''
+                    self.is_change = 2
+                elif self.is_change == 2:
+                    self.new_password = pw
+                    self.message = _('Confirm new PIN')
+                    self.ids.kb.password = ''
+                    self.is_change = 3
+                elif self.is_change == 3:
+                    self.success = pw == self.new_password
+                    self.dismiss()
+            else:
+                self.app.show_error(_('Wrong PIN'))
+                self.ids.kb.password = ''

gui/kivy/uix/dialogs/settings.py

@@ -36,9 +36,8 @@ Builder.load_string('''
                     action: partial(root.language_dialog, self)
                 CardSeparator
                 SettingsItem:
-                    status: '' if root.disable_pin else ('ON' if root.use_encryption else 'OFF')
                     disabled: root.disable_pin
-                    title: _('PIN code') + ': ' + self.status
+                    title: _('PIN code')
                     description: _("Change your PIN code.")
                     action: partial(root.change_password, self)
                 CardSeparator