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Restructured the complete code to make it more modular

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git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@232 96b47cad-a561-4643-ad3b-153ac7d7599c
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oepen
2010-07-28 14:25:18 +00:00
parent 177bf430f8
commit 559d5c551c
23 changed files with 1117 additions and 0 deletions
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eID_gui/src/eid/windows.py Normal file
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#coding: utf-8
import sys, subprocess, os
try:
import pygtk
pygtk.require("2.0")
import gtk, gobject, glib, pango
except ImportError:
sys.exit(1)
try:
import pace
except ImportError:
print >> sys.stderr, "Could not import pace module, please install pyPACE"
sys.exit(1)
from eid_gui_globals import IMAGES, GLADE_FILE, EPA_ATR
from widgets import customCheckButton
from logic import cardChecker
class MokoWindow(gtk.Window):
"""
Base class for all our dialogues. It's a simple gtk.Window, with a title at
the top and to buttons at the bottom. In the middle there is a vBox where
we can put custom stuff for each dialoge.
All the dialoges are stored as a double-linked list, so the navigation from
one window to another is easy
"""
def __init__(self, title, predecessor):
super(MokoWindow, self).__init__()
self.title_str = title
self.predecessor = predecessor
assert(isinstance(self.title_str, basestring))
self.connect("destroy", gtk.main_quit)
#Display resolution of OpenMoko minus height of the SHR toolbar
self.set_size_request(480, 586)
#self.set_resizable(False)
#Main VBox, which consists of the title, the body, and the buttons
self.__vb = gtk.VBox(False, 5)
self.add(self.__vb)
#Title label at the top of the window
lbl_title = gtk.Label(self.title_str)
lbl_title.modify_font(pango.FontDescription("sans 14"))
lbl_title.set_alignment(0.5, 0.0)
self.__vb.pack_start(lbl_title, False, False)
#Body VBox for custom widgets
self.body = gtk.VBox(False)
#Add a scrollbar in case we must display lots of information
#Only use a vertical spacebar, not a horizontal one
scrolled_window = gtk.ScrolledWindow()
scrolled_window.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
scrolled_window.set_shadow_type(gtk.SHADOW_ETCHED_OUT)
self.__vb.pack_start(scrolled_window)
scrolled_window.add_with_viewport(self.body)
#Add two buttons at the bottom of the window
hbox = gtk.HBox(True, 5)
if self.predecessor is None:
btnBack = gtk.Button("Abbrechen")
else:
btnBack = gtk.Button(u"Zurück")
btnBack.set_size_request(150, 75)
btnBack.connect("clicked", self.btnBack_clicked, None)
if isinstance(btnBack.child, gtk.Label):
lbl = btnBack.child
else:
raise ValueError("Button does not have a label")
lbl.modify_font(pango.FontDescription("sans 12"))
hbox.pack_start(btnBack, True, True)
btnForward = gtk.Button("Weiter")
btnForward.set_size_request(150, 75)
btnForward.connect("clicked", self.btnForward_clicked, None)
if isinstance(btnForward.child, gtk.Label):
lbl = btnForward.child
else:
raise ValueError("Button does not have a label")
hbox.pack_start(btnForward, True, True)
lbl.modify_font(pango.FontDescription("sans 12"))
self.__vb.pack_start(hbox, False, False)
#Place window in the center of the screen
self.set_position(gtk.WIN_POS_CENTER_ALWAYS)
def btnBack_clicked(self, widget, data=None):
"""Go back to the previous window. If there is no previous window,
do nothing"""
if self.predecessor is None:
gtk.main_quit()
else:
self.predecessor.show_all()
self.hide()
def btnForward_clicked(self, widget, data=None):
"""Go to the next window. If there is no next window, do nothing"""
if self.successor is None:
pass
else:
self.successor.show_all()
self.hide()
class MsgBox(gtk.Dialog):
"""The gtk.MessageDialog looks like crap on the Moko, so we write our own"""
def __init__(self, parent, msg, img_type, flags):
#img is a string which is used as a key for the IMAGES dictionary
if img_type is not None:
assert IMAGES.has_key(img_type)
super(MsgBox, self).__init__(title="", parent=parent, flags=flags)
#Dialog will be resized to screen width no matter what. Therefore we
#use the whole width from the beginning to avoid being resized
self.set_size_request(480, 160)
hbox_top = gtk.HBox()
lbl = gtk.Label(msg)
lbl.set_width_chars(20)
lbl.set_line_wrap(True)
btn = gtk.Button("Ok")
btn.connect("clicked", self.__destroy)
img = gtk.Image()
img.set_from_file(IMAGES[img_type])
hbox_top.pack_start(img, False, False)
hbox_top.pack_start(lbl, True, True)
self.vbox.pack_start(hbox_top)
#self.vbox.pack_start(gtk.HSeparator())
hbox_bottom = gtk.HBox()
spacer = gtk.Label("")
spacer.set_size_request(380, 25)
hbox_bottom.pack_start(spacer, False, False)
hbox_bottom.pack_start(btn, True, True)
self.vbox.pack_start(hbox_bottom)
#hbox.pack_start(vbox)
#self.add(hbox)
#self.set_decorated(False)
self.set_modal(True)
self.show_all()
def __destroy(self, widget=None, data=None):
self.destroy()
class CertificateDescriptionWindow(MokoWindow):
"""This window is used to display information about the service provider,
extracted from the terminal certificate and the appendant certificate
description"""
def __init__(self, binDescription, binCert):
super(CertificateDescriptionWindow, self).__init__("Dienstanbieter", None)
#binDesciption contains the Certificate Description as a octet string
desc = pace.d2i_CVC_CERTIFICATE_DESCRIPTION(binDescription)
self.successor = CVCWindow(binCert, self)
#Display the validity period:
cvc = pace.d2i_CV_CERT(binCert)
effective_date = self.formatDate(pace.get_effective_date(cvc))
expiration_date = self.formatDate(pace.get_expiration_date(cvc))
validity_period = effective_date + " - " + expiration_date
#self.addRow(u"Gültig ab:", effective_date)
#self.addRow(u"Gültig bis:", expiration_date)
self.addRow(u"Gültigkeitszeitraum:", validity_period)
#Display issuer Name and possibly URL and subject name and possibly URL
issuer_name = pace.get_issuer_name(desc)
issuer_url = pace.get_issuer_url(desc)
self.addRow("Zertifikatsaussteller:", issuer_name)
if issuer_url is not None:
self.addRow("", issuer_url, True)
subject_name = pace.get_subject_name(desc)
subject_url = pace.get_subject_url(desc)
self.addRow("Zertifikatsinhaber:", subject_name)
if subject_url is not None:
self.addRow("", subject_url, True)
self.set_focus(None)
#Extract, format and display the terms of usage
terms = pace.get_termsOfUsage(desc)
formated_terms = self.formatTOU(terms)
self.addRow("Beschreibung:", formated_terms)
self.show_all()
def formatDate(self, date):
"""Take a date string in the form that is included in CV Certificates
(YYMMDD) and return it in a better readable format (DD.MM.YYYY)"""
assert(isinstance(date, basestring))
assert(len(date) == 6)
year = date[:2]
month = date[2:4]
day = date[4:6] #Cut off trailing \0
#Implicit assumption: 2000 <= year < 3000
return day + "." + month + "." + "20" + year
def formatTOU(self, terms):
# for s in self.terms_array:
# s = s.replace(", ", "\n").strip()
# lbl = gtk.Label(s)
# lbl.set_alignment(0.0, 0.0)
# lbl.set_width_chars(60)
# lbl.set_line_wrap(True) #XXX: Doesn't work on the Moko
# lbl.modify_font(pango.FontDescription("bold"))
# self.body.pack_start(gtk.HSeparator())
# self.body.pack_start(lbl, False, False, 2)
return terms.replace(", ", "\r\n")
def addRow(self, title, text, url=False):
if not url: #URL has no title
lbl_title = gtk.Label(title)
lbl_title.set_width_chars(20)
lbl_title.set_alignment(0.0, 0.5)
lbl_title.modify_font(pango.FontDescription("bold"))
self.body.pack_start(lbl_title)
hbox = gtk.HBox()
lbl = gtk.Label("") #Empty label for spacing
lbl.set_width_chars(3)
hbox.pack_start(lbl)
if url:
lblText = gtk.LinkButton(text, text)
if isinstance(lblText.child, gtk.Label):
lbl = lblText.child
else:
raise ValueError("Button does not have a label")
lbl.set_width_chars(40)
else:
lblText = gtk.Label(text)
lblText.set_width_chars(40)
lblText.set_alignment(0.0, 0.0)
hbox.pack_start(lblText)
self.body.pack_start(hbox)
class CVCWindow(MokoWindow):
"""This window is used to display and modify the access encoded in the CHAT
of a CV Certificate"""
def __init__(self, binCert, predecessor):
super(CVCWindow, self).__init__("Zugriffsrechte", predecessor)
self.successor = PinpadGTK("pin", None)
#Convert the binary certificate to the internal representation and
#extract the relative authorization from the chat
cvc = pace.d2i_CV_CERT(binCert)
chat = pace.cvc_get_chat(cvc)
self.chat_oid = pace.get_chat_oid(chat)
self.chat = pace.get_binary_chat(chat)
self.rel_auth = []
for char in self.chat:
self.rel_auth.append(ord(char))
self.rel_auth_len = len(self.rel_auth)
#Extract the access rights from the CHAT and display them in the window
self.access_rights = []
j = 0
for i in range((self.rel_auth_len - 1) * 8 - 2):
if (i % 8 == 0):
j += 1
if self.rel_auth[self.rel_auth_len - j] & (1 << (i % 8)):
chk = customCheckButton(i, self.body)
self.access_rights.append(chk)
def btnForward_clicked(self, widget, data=None):
""" Check wether any access right have been deselected and modify the
CHAT accordingly """
for right in self.access_rights:
if not right.is_active():
idx = right.idx
self.rel_auth[len(self.chat) - 1 - idx / 8] ^= (1 << (idx % 8))
#super(CVCWindow, self).btnForward_clicked(widget, data)
new_chat_list = []
for byte in self.chat_oid:
new_chat_list.append(ord(byte))
new_chat_list.append(len(self.rel_auth))
new_chat_list.extend(self.rel_auth)
new_chat = self.__formatHexString(new_chat_list)
self.successor.set_chat(new_chat)
self.successor.show()
self.hide()
def __formatHexString(self, int_list):
"""Take a list of integers and convert it to a hex string, where the
individual bytes are seperated by a colon (e.g. "0f:00:00")"""
hex_str = ""
for i in int_list:
byte = hex(i)[2:]
if len(byte) == 1: byte = "0" + byte
hex_str += byte + ":"
return hex_str[:-1]
class PinpadGTK:
"""This a simple GTK based GUI to enter a PIN/PUK/CAN"""
def __init__(self, secret="pin", chat=None, cert=None):
btn_names = ["btnOne", "btnTwo", "btnThree", "btnFour", "btnFive",
"btnSix", "btnSeven", "btnEight", "btnNine", "btnDel",
"btnZero", "btnOk"]
self.pin = ""
self.secret = secret
if self.secret == "pin" or self.secret == "can":
self.secret_len = 6
elif self.secret == "transport":
self.secret_len = 5
elif self.secret == "puk":
self.secret_len = 10
else:
raise ValueError("Unknwon secret type: %s" % self.secret)
#gtk.main_quit()
self.chat = chat
self.cert = cert
#Set the Glade file
self.gladefile = GLADE_FILE
self.builder = gtk.Builder()
try:
self.builder.add_from_file(self.gladefile)
except glib.GError, err:
#If we encounter an exception at startup, we display a popup with
#the error message
popup = MsgBox(None, err.message, "error", None)
popup.run()
popup.destroy()
raise err
#Get the Main Window, and connect the "destroy" event
#Create our dictionay and connect it
dic = { "on_btnOne_clicked" : self.digit_clicked,
"on_btnTwo_clicked" : self.digit_clicked,
"on_btnThree_clicked" : self.digit_clicked,
"on_btnFour_clicked" : self.digit_clicked,
"on_btnFive_clicked" : self.digit_clicked,
"on_btnSix_clicked" : self.digit_clicked,
"on_btnSeven_clicked" : self.digit_clicked,
"on_btnEight_clicked" : self.digit_clicked,
"on_btnNine_clicked" : self.digit_clicked,
"on_btnZero_clicked" : self.digit_clicked,
"on_btnOk_clicked" : self.btnOk_clicked,
"on_btnDel_clicked" : self.btnDel_clicked,
"on_MainWindow_destroy_event" : self.shutdown,
"on_MainWindow_destroy" : self.shutdown }
self.builder.connect_signals(dic)
#Change the font for the text field and set it up up properly for the
#type of secret we are using
self.output = self.builder.get_object("txtOutput")
self.output.modify_font(pango.FontDescription("Monospace 16"))
self.output.set_text(self.secret_len * "_")
#Look for card and set the label accordingly
self.lbl_cardStatus = self.builder.get_object("lbl_cardStatus")
#Fetch the status image
self.img_cardStatus = self.builder.get_object("img_cardStatus")
self.img_cardStatus.set_from_file(IMAGES["error"])
#We only start the thread for polling the card when the window
#is shown
self.cardChecker = None
#Change the font for the buttons
#For this you have to retrieve the label of each button and change
#its font
for btn_name in btn_names:
btn = self.builder.get_object(btn_name)
if btn.get_use_stock():
lbl = btn.child.get_children()[1]
elif isinstance(btn.child, gtk.Label):
lbl = btn.child
else:
raise ValueError("Button does not have a label")
if (btn_name == "btnOk" or btn_name == "btnDel"):
lbl.modify_font(pango.FontDescription("sans 14"))
else:
lbl.modify_font(pango.FontDescription("sans 18"))
#Display Main Window
self.window = self.builder.get_object("MainWindow")
self.window.connect("destroy", self.shutdown)
self.window.hide()
def show(self):
"""Start the polling thread, then show the window"""
if self.cardChecker is None:
self.cardChecker = cardChecker(self.lbl_cardStatus, self.img_cardStatus,
EPA_ATR)
gobject.idle_add(self.cardChecker.start)
self.window.show_all()
def set_chat(self, chat):
self.chat = chat
def shutdown(self, widget):
"""Stop the cardChecker thread before exiting the application"""
if self.cardChecker is not None:
self.cardChecker.stop()
self.cardChecker.join()
gtk.main_quit()
def digit_clicked(self, widget):
"""We indicate the ammount of digits with underscores
For every digit that is enterd we replace one underscore with a star
We only accept secret_len digits and ignore every additional digit"""
digit = widget.get_label()
assert digit.isdigit()
txt = self.output.get_text()
if len(self.pin) < self.secret_len:
# self.output.set_text(txt.replace("_", digit, 1))
idx = txt.find('_')
output = txt[:idx] + digit + txt[idx+1:]
self.output.set_text(output)
gobject.timeout_add(750, self.hide_digits, idx)
self.pin += digit
def hide_digits(self, idx):
"""Change character number idx of self.output text to a '*' """
output = ""
txt = self.output.get_text()
if txt[idx].isdigit():
output = txt[:idx] + '*' + txt[idx+1:]
self.output.set_text(output)
return False
def btnOk_clicked(self, widget):
"""Pass the entered secret to pace-tool. If pace-tool is run
sucessfully exit, otherwise restart the PIN entry"""
env_args = os.environ
#cmd contains the command and all the parameters for our subproccess
cmd = ["pace-tool"]
#We have to select the type of secret to use via a command line
#parameter and provide the actual secret via an environment variable
if self.secret == "pin" or self.secret == "transport":
cmd.append("--pin")
env_args["PIN"] = self.pin
elif self.secret == "can":
cmd.append("--can")
env_args["CAN"] = self.pin
elif self.secret == "puk":
cmd.append("--puk")
env_args["PUK"] = self.pin
else:
raise ValueError("Unknown secret type: %s" % self.secret)
#If we have a CHAT, we pass it to pace-tool
if (self.chat):
cmd.append("--chat=" + self.chat)
cmd.append("-v")
#Try to call pace-tool. This is a blocking call. An animation is being
#shown while the subprocess is running
try:
#Stop polling the card while PACE is running
self.cardChecker.pause()
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, env=env_args,
close_fds=True)
except OSError:
popup = MsgBox(self.window, "pace-tool wurde nicht gefunden",
"error", gtk.DIALOG_DESTROY_WITH_PARENT)
popup.run()
popup.destroy()
self.cardChecker.resume() #Restart cardChecker
return
#Show the animation to indicate that the program is not dead
waiting = gtk.Window(gtk.WINDOW_POPUP)
animation = gtk.gdk.PixbufAnimation(IMAGES["wait"])
img = gtk.Image()
img.set_from_animation(animation)
waiting.add(img)
waiting.set_position(gtk.WIN_POS_CENTER_ALWAYS)
waiting.set_modal(True)
waiting.set_transient_for(self.window)
waiting.set_decorated(False)
waiting.show_all()
#Try to keep the GUI responsive by taking care of the event queue
line = proc.stdout.readline()
while line:
while gtk.events_pending():
gtk.main_iteration()
line = proc.stdout.readline()
#Get the return value of the pace-tool process
ret = proc.poll()
waiting.destroy()
self.cardChecker.resume()
if (ret == 0):
popup = MsgBox(self.window, "Pin wurde korrekt eingegeben", "apply",
gtk.DIALOG_DESTROY_WITH_PARENT)
popup.run()
popup.destroy()
#XXX: Actually we should return to the application that started
#the PIN entry
self.shutdown(None)
else:
popup = MsgBox(self.window, "PIN wurde falsch eingegeben", "error",
gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT)
popup.run()
popup.destroy()
self.output.set_text(self.secret_len * "_")
self.pin = ""
def btnDel_clicked(self, widget):
"""Remove one digit from the pin and replace the last * in the output
field with an underscore"""
self.pin = self.pin[:-1]
num_digits = len(self.pin)
output = num_digits * '*' + (self.secret_len - num_digits) * "_"
self.output.set_text(output)