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keymanagement_gui.py
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keymanagement_gui.py
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#
# Proximate - Peer-to-peer social networking
#
# Copyright (c) 2008-2011 Nokia Corporation
#
# All rights reserved.
#
# This software is licensed under The Clear BSD license.
# See the LICENSE file for more details.
#
import gtk
from gobject import timeout_add, source_remove
from os.path import join
from guiutils import pango_escape, GUI_Page
from support import info, debug, warning
from community import get_myself, get_user
from pathname import get_dir, ICON_DIR
from plugins import get_plugin_by_type
from proximateprotocol import PLUGIN_TYPE_KEY_MANAGEMENT, PLUGIN_TYPE_COMMUNITY, \
PLUGIN_TYPE_NOTIFICATION
from general_dialogs import Approve_Deny_Dialog
class Key_Management_GUI:
""" User interface for exchanging and managing encryption keys """
def __init__(self, gui):
self.keymanagement = get_plugin_by_type(PLUGIN_TYPE_KEY_MANAGEMENT)
self.notification = get_plugin_by_type(PLUGIN_TYPE_NOTIFICATION)
self.main_gui = gui
self.dialog = gtk.Dialog('Key Management', gui.main_window,
gtk.DIALOG_DESTROY_WITH_PARENT | gtk.DIALOG_MODAL,
(gtk.STOCK_APPLY, gtk.RESPONSE_APPLY,
gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL))
self.key_label = gtk.Label('Key ID: ')
self.dialog.vbox.pack_start(self.key_label, False, True)
self.gen_button = gtk.Button('Regenerate keys')
self.dialog.vbox.pack_start(self.gen_button, False, True)
self.close_button = gtk.Button('Close')
self.gen_button.connect('clicked', self.generate_keys)
self.generator = None
self.generating_keys = False
def run(self):
key_fname = get_myself().get('key_fname')
if key_fname != '':
keyid = key_fname.split('/')[-1].split('_')[1][:8]
if keyid != '':
self.key_label.set_label(keyid)
self.toggle_apply(False)
self.dialog.show_all()
response = self.dialog.run()
if response == gtk.RESPONSE_APPLY:
if self.generating_keys:
return
self.keymanagement.save_key(get_myself(),
priv=self.priv, pub=self.pub)
else:
self.generating_keys = False
if self.generator:
self.generator.cancel()
self.main_gui.main_progress_bar.set_fraction(0.0)
self.main_gui.main_progress_bar.set_text("")
self.dialog.hide()
def toggle_apply(self, state=None):
if state == None:
state = not self.dialog.action_area.get_children()[1].get_property(
'sensitive')
self.dialog.action_area.get_children()[1].set_property('sensitive', state)
def generate_keys(self, widget, data = None):
self.generating_keys = True
self.generator = self.keymanagement.gen_key_pair(2048, self.generate_keys_cb)
self.keymanagement.progress_update('Generating permanent key, size 2048 bits')
def generate_keys_cb(self, priv, pub):
self.keymanagement.progress_update(None)
if (priv and pub):
self.notification.notify('Generated permanent key')
keyid = self.keymanagement.key_hash(priv, pub)[:8]
self.key_label.set_label(keyid)
(self.priv, self.pub) = (priv, pub)
else:
self.notification.notify('Could not generate permanent key')
self.generating_keys = False
self.generator = None
self.toggle_apply(True)
def generate_perm_key_cb(self, ready):
if ready:
self.main_gui.main_progress_bar.set_text('')
else:
self.main_gui.main_progress_bar.set_text('No permanent key, generating...')
class Key_Exchange_GUI(GUI_Page):
def __init__(self, gui):
GUI_Page.__init__(self, 'Key exchange')
self.keymanagement = get_plugin_by_type(PLUGIN_TYPE_KEY_MANAGEMENT)
self.community = get_plugin_by_type(PLUGIN_TYPE_COMMUNITY)
self.notification = get_plugin_by_type(PLUGIN_TYPE_NOTIFICATION)
self.main_gui = gui
self.user = None
self.entered_key = ''
self.request_dialog = None
self.main_vbox = gtk.VBox()
self.notebook = gtk.Notebook()
self.notebook.set_show_tabs(False)
self.main_vbox.pack_start(self.notebook)
# notebook pages for differents stages of key exchange
lock_image = gtk.image_new_from_file(join(get_dir(ICON_DIR),
'Padlock.png'))
# page 1: show messages
page1 = gtk.VBox()
self.messagelabel = gtk.Label()
page1.pack_start(self.messagelabel)
self.notebook.append_page(page1)
# page 2: show generated symmetric key
page2 = gtk.VBox()
self.show_key_header = gtk.Label()
page2.pack_start(self.show_key_header, False, True, 10)
self.keylabel = gtk.Label()
page2.pack_start(self.keylabel)
key_show_eventbox = gtk.EventBox()
key_show_eventbox.modify_bg(gtk.STATE_NORMAL,
key_show_eventbox.get_colormap().alloc_color('red'))
key_show_eventbox.add(page2)
self.notebook.append_page(key_show_eventbox)
# page 3: ask for symmetric key
page3 = gtk.VBox()
self.key_entry_header = gtk.Label()
page3.pack_start(self.key_entry_header, False, True, 10)
page3_hbox = gtk.HBox()
page3.pack_start(page3_hbox)
self.keyentry = gtk.Label()
page3_hbox.pack_start(self.keyentry)
page3_hbox.pack_start(lock_image, False, False)
self.key_eventbox = gtk.EventBox()
self.key_eventbox.set_events(gtk.gdk.KEY_PRESS_MASK)
self.key_eventbox.set_flags(gtk.HAS_FOCUS | gtk.CAN_FOCUS)
self.key_eventbox.modify_bg(gtk.STATE_NORMAL,
self.key_eventbox.get_colormap().alloc_color('red'))
self.key_eventbox.add(page3)
self.notebook.append_page(self.key_eventbox)
self.key_eventbox.connect('button-press-event', self.save_temp_key_clicked)
self.key_eventbox.connect('key-press-event', self.key_entry_modify)
self.pack_start(self.main_vbox)
self.show_all()
self.main_gui.add_page(self)
self.keymanagement.register_ui(self)
def run(self, user):
if self.user:
return
self.user = user
debug('Opening GUI to exchange keys with %s\n' %(user.get('nick')))
if not self.keymanagement.community.get_myself().get("key_fname"):
# we do not have a permanent key to exhange
self.notification.ok_dialog('Key Management', 'You do not have a key to exchange.')
return
self.keymanagement.send_exchange_request(user)
self.notification.notify('Key Management: Sending request to exchange keys with %s...' %(user.get('nick')))
def back_action(self):
if self.user:
self.keymanagement.send_cancel(self.user)
self.user = None
return True
def save_temp_key_clicked(self, widget, event, data=None):
if len(self.entered_key) == self.keymanagement.passphraselen:
self.keymanagement.save_symmetric_key(self.entered_key, self.user)
self.entered_key = ''
def key_entry_modify(self, widget, event, data=None):
if event.keyval in range(gtk.keysyms.A, gtk.keysyms.Z + 1) + \
range(gtk.keysyms.a, gtk.keysyms.z + 1) + \
range(gtk.keysyms._0, gtk.keysyms._9 + 1):
if len(self.entered_key) == self.keymanagement.passphraselen:
return
else:
self.entered_key = self.entered_key + \
chr(gtk.gdk.keyval_to_unicode(event.keyval))
elif event.keyval == gtk.keysyms.BackSpace:
if len(self.entered_key) > 0:
self.entered_key = self.entered_key[:-1]
# N810's keyboard return has keycode 65421
elif event.keyval in (gtk.keysyms.Return, 65421):
if self.generating_temp:
return
self.save_temp_key_clicked(widget, event)
return
else:
return
self.set_keyentry_text()
def set_keyentry_text(self):
show_text = self.entered_key + (' <u> </u>' *
(self.keymanagement.passphraselen - len(self.entered_key)))
self.keyentry.set_markup('<span foreground="white" size="62000">%s</span>'
%(show_text))
def open_gui(self):
""" This is called when:
1. the user requests a key exchange
2. the other user accepts the key exchange """
self.main_gui.show_page(self)
nick = pango_escape(self.user.get('nick'))
self.show_key_header.set_markup(
'<span foreground="white" size="xx-large">Show this secret to <b>%s</b></span>' %(nick))
self.key_entry_header.set_markup(
'<span foreground="white" size="xx-large">Enter secret from <b>%s</b></span>' %(nick))
def close_gui(self):
if not self.is_visible:
return
debug("keymanagement: Closing GUI\n")
self.user = None
if self.request_dialog:
self.request_dialog.base.destroy()
self.keymanagement.progress_update(None)
self.main_gui.hide_page(self)
def plugin_to_gui(self, user, request, isinitiator):
nick = user.get('nick')
if request == self.keymanagement.KM_REQUEST_KEY:
self.user = user
if not self.keymanagement.community.get_myself().get("key_fname"):
# we do not have a permanent key to exhange
self.request_dialog = Approve_Deny_Dialog(
self.main_gui.get_main_window(),
'Key Management',
'%s requests to exchange keys,\nbut you don\'t have a key.' %(nick),
self.dialog_response_request, user)
self.request_dialog.base.action_area.get_children()[0].set_property(
"sensitive", False)
else:
self.request_dialog = Approve_Deny_Dialog(
self.main_gui.get_main_window(),
'Key Management',
'%s requests to exchange keys.\nAccept?' %(nick),
self.dialog_response_request, user)
elif request == self.keymanagement.KM_REQUEST_ACK:
self.open_gui()
self.notebook.set_current_page(0)
self.messagelabel.set_text('Waiting for an answer...')
debug('Key management: showing page 1\n')
elif request == self.keymanagement.KM_REQUEST_OK:
timeout = timeout_add(100, self.wait_for_temp_key)
elif request == self.keymanagement.KM_REQUEST_DENIED:
self.notification.ok_dialog('Key Management', '%s denied your request to exchange keys.' %(nick))
self.close_gui()
elif request == self.keymanagement.KM_REQUEST_ANSWER_ACK:
self.open_gui()
self.notebook.set_current_page(2)
self.key_eventbox.grab_focus()
self.entered_key = ''
self.set_keyentry_text()
debug('Key management: showing page 3\n')
elif request == self.keymanagement.KM_TEMP_KEY_ACK:
self.messagelabel.set_text('Sending keys...')
self.notebook.set_current_page(0)
elif request == self.keymanagement.KM_TEMP_KEY1:
self.messagelabel.set_text('Sending keys...')
self.notebook.set_current_page(0)
elif request == self.keymanagement.KM_FINISHED:
self.notification.ok_dialog('Key Management', 'Successful key exchange!')
self.close_gui()
elif request == self.keymanagement.KM_CANCEL:
self.notification.ok_dialog('Key Management', 'Key exchange canceled')
self.close_gui()
elif request == self.keymanagement.KM_ERROR:
s = 'Error during key exchange!'
if not isinitiator:
s += '\nYou may possibly have written an incorrect code.'
self.notification.ok_dialog('Key Management', s)
self.close_gui()
elif request == self.keymanagement.KM_REQUEST_NACK:
self.notification.ok_dialog('Key Management', '%s is busy' %(nick))
def dialog_response_request(self, response, user):
self.request_dialog = None
self.keymanagement.send_request_answer(response, user)
def generating_temp_key(self):
self.generating_temp = True
self.keymanagement.progress_update('Generating temporary key')
def generated_temp_key(self):
self.generating_temp = False
self.keymanagement.progress_update(None)
def wait_for_temp_key(self):
if not self.generating_temp:
self.keylabel.set_markup('<span foreground="white" size="62000">%s</span>'
%(self.keymanagement.temp_passphrase))
self.notebook.set_current_page(1)
debug('Key management: showing page 2\n')
return False
else:
return True
def init_ui(main_gui):
Key_Exchange_GUI(main_gui)