scyther/gui/Scytherthread.py

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#!/usr/bin/python
#---------------------------------------------------------------------------
""" Import externals """
import wx
import os
import sys
import re
import threading
import StringIO
# Python Imaging library?
usePIL = True
try:
import Image
except ImportError:
usePIL = False
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#---------------------------------------------------------------------------
""" Import scyther components """
import XMLReader
""" Import scyther-gui components """
import Tempfile
import Claim
import Preference
import Scyther
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import Attackwindow
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import Icon
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#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
class ScytherThread(threading.Thread):
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""" The reason this is a thread is because we might to decide to
abort it. However, apparently Python has no good support for killing
threads yet :( """
# Override Thread's __init__ method to accept the parameters needed:
def __init__ ( self, parent ):
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self.parent = parent
parent.verified = False
parent.claims = []
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threading.Thread.__init__ ( self )
def run(self):
self.claimResults()
# Results are done (claimstatus can be reported)
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# Shoot down the verification window and let the RunScyther function handle the rest
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self.parent.verified = True
self.parent.verifywin.Close()
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def claimResults(self):
""" Convert spdl to result (using Scyther)
"""
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self.parent.scyther = scyther = Scyther.Scyther()
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scyther.options = self.parent.options
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scyther.setInput(self.parent.spdl)
self.parent.claims = scyther.verify()
self.parent.summary = str(scyther)
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#---------------------------------------------------------------------------
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class AttackThread(threading.Thread):
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""" This is a thread because it computes images from stuff in the
background """
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# Override Thread's __init__ method to accept the parameters needed:
def __init__ ( self, parent, resultwin, callbackclaim=None,callbackattack=None ):
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self.parent = parent
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self.resultwin = resultwin
self.callbackclaim = callbackclaim
self.callbackattack = callbackattack
self.totalattacks = 0
for cl in self.parent.claims:
for attack in cl.attacks:
self.totalattacks += 1
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threading.Thread.__init__ ( self )
def run(self):
# create the images in the background
# when the images of a claim are done, callback is called with
# the claim
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self.makeImages()
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def makeImages(self):
""" create images """
done = 0
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for cl in self.parent.claims:
for attack in cl.attacks:
self.makeImage(attack)
done += 1
if self.callbackattack:
self.callbackattack(attack,self.totalattacks,done)
if self.callbackclaim:
self.callbackclaim(cl)
def makeImage(self,attack):
""" create image for this particular attack """
global usePIL
if usePIL:
# If we have the PIL library, we can do postscript! great
# stuff.
type = "ps"
ext = ".ps"
else:
# Ye olde pnge file
type = "png"
ext = ".png"
# command to write to temporary file
(fd2,fpname2) = Tempfile.tempcleaned(ext)
f = os.fdopen(fd2,'w')
cmd = "dot -T%s" % (type)
# execute command
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cin,cout = os.popen2(cmd,'b')
cin.write(attack.scytherDot)
cin.close()
for l in cout.read():
f.write(l)
cout.close()
f.flush()
f.close()
# if this is done, store and report
attack.filetype = type
attack.file = fpname2 # this is where the file name is stored
#---------------------------------------------------------------------------
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class VerificationWindow(wx.Dialog):
def __init__(
self, parent, title, pos=wx.DefaultPosition, size=wx.DefaultSize,
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style=wx.DEFAULT_DIALOG_STYLE
):
wx.Dialog.__init__(self,parent,-1,title,pos,size,style)
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sizer = wx.BoxSizer(wx.VERTICAL)
label = wx.StaticText(self, -1, "Verifying protocol description")
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sizer.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
line = wx.StaticLine(self, -1, size=(20,-1), style=wx.LI_HORIZONTAL)
sizer.Add(line, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
btnsizer = wx.StdDialogButtonSizer()
btn = wx.Button(self, wx.ID_CANCEL)
btnsizer.AddButton(btn)
btnsizer.Realize()
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sizer.Add(btnsizer, 0, wx.ALIGN_CENTER_VERTICAL|wx.ALL|wx.ALIGN_CENTER, 5)
self.SetSizer(sizer)
sizer.Fit(self)
#---------------------------------------------------------------------------
class ErrorWindow(wx.Dialog):
def __init__(
self, parent, title, pos=wx.DefaultPosition, size=wx.DefaultSize,
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style=wx.DEFAULT_DIALOG_STYLE,errors=[]
):
wx.Dialog.__init__(self,parent,-1,title,pos,size,style)
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sizer = wx.BoxSizer(wx.VERTICAL)
label = wx.StaticText(self, -1, "Errors")
sizer.Add(label, 0, wx.ALIGN_LEFT|wx.ALL, 5)
line = wx.StaticLine(self, -1, size=(20,-1), style=wx.LI_HORIZONTAL)
sizer.Add(line, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
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label = wx.StaticText(self, -1, "\n".join(errors))
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sizer.Add(label, 0, wx.ALIGN_LEFT|wx.ALL, 5)
sizer.Add(line, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
btnsizer = wx.StdDialogButtonSizer()
btn = wx.Button(self, wx.ID_OK)
btnsizer.AddButton(btn)
btnsizer.Realize()
sizer.Add(btnsizer, 0, wx.ALIGN_CENTER_VERTICAL|wx.ALL|wx.ALIGN_CENTER, 5)
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self.SetSizer(sizer)
sizer.Fit(self)
#---------------------------------------------------------------------------
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class ResultWindow(wx.Frame):
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"""
Displays the claims status and contains buttons to show the actual
attack graphs
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TODO: this really should have a statusbar that works.
TODO: on windows, it updates really slow, and the background is the
wrong colour. Basically, it inhales air. Hard.
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"""
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def __init__(
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self, parent, parentwindow, title, pos=wx.DefaultPosition, size=wx.DefaultSize,
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style=wx.DEFAULT_DIALOG_STYLE
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):
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wx.Frame.__init__(self,parentwindow,-1,title,pos,size,style)
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Icon.ScytherIcon(self)
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self.parent = parent
self.thread = None
self.Bind(wx.EVT_CLOSE, self.onCloseWindow)
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self.CreateStatusBar()
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self.BuildTable()
def onViewButton(self,evt):
btn = evt.GetEventObject()
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w = Attackwindow.AttackWindow(btn.claim)
w.Show(True)
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def onCloseWindow(self,evt):
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""" TODO we should kill self.thread """
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# Clean up
self.parent.claims = None
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self.Destroy()
def BuildTable(self):
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# Now continue with the normal construction of the dialog
# contents
sizer = wx.BoxSizer(wx.VERTICAL)
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# For these claims...
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claims = self.parent.claims
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# set up grid
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self.grid = grid = wx.GridBagSizer(7,1+len(claims))
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def titlebar(x,title,width=1):
txt = wx.StaticText(self,-1,title)
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font = wx.Font(14,wx.NORMAL,wx.NORMAL,wx.NORMAL)
txt.SetFont(font)
grid.Add(txt,(0,x),(1,width))
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titlebar(0,"Claim",5)
if len(claims) > 0:
sn = claims[0].stateName(2)
resulttxt = sn[0].upper() + sn[1:]
else:
resulttxt = "Results"
titlebar(5,resulttxt,2)
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self.lastprot = None
self.lastrole = None
for index in range(0,len(claims)):
self.BuildClaim(grid,claims[index],index+1)
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sizer.Add(grid, 0,wx.ALIGN_CENTRE|wx.ALL,5)
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self.SetSizer(sizer)
sizer.Fit(self)
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def BuildClaim(self,grid,cl,ypos):
# a support function
def addtxt(txt,column):
grid.Add(wx.StaticText(self,-1,txt),(ypos,column),(1,1),wx.ALIGN_CENTER_VERTICAL)
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# button for ok/fail
tsize = (16,16)
if cl.okay:
bmp = wx.ArtProvider_GetBitmap(wx.ART_TICK_MARK,wx.ART_CMN_DIALOG,tsize)
else:
bmp = wx.ArtProvider_GetBitmap(wx.ART_CROSS_MARK,wx.ART_CMN_DIALOG,tsize)
if not bmp.Ok():
bmp = wx.EmptyBitmap(tsize)
bmpfield = wx.StaticBitmap(self,-1,bmp)
grid.Add(bmpfield,(ypos,0),(1,1),wx.ALIGN_CENTER_VERTICAL)
# protocol, role, label
prot = str(cl.protocol)
showPR = False
if prot != self.lastprot:
self.lastprot = prot
showPR = True
role = str(cl.role)
if role != self.lastrole:
self.lastrole = role
showPR = True
if showPR:
addtxt(prot,1)
addtxt(role,2)
addtxt(str(cl.shortlabel),3)
claimdetails = str(cl.claimtype)
if cl.parameter:
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claimdetails += " %s" % (cl.parameter)
addtxt(claimdetails + " ",4)
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# add view button (if needed)
n = len(cl.attacks)
cl.button = wx.Button(self,-1,"%i %s" % (n,cl.stateName(n)))
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cl.button.claim = cl
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grid.Add(cl.button,(ypos,5),(1,1),wx.ALIGN_CENTER_VERTICAL)
cl.button.Disable()
if n > 0:
# Aha, something to show
self.Bind(wx.EVT_BUTTON, self.onViewButton,cl.button)
# remark something about completeness
remark = ""
if not cl.complete:
if n == 0:
# no attacks, no states within bounds
remark = "within bounds"
else:
# some attacks/states within bounds
remark = "at least, maybe more"
else:
if n == 0:
# no attacks, no states
remark = "none"
else:
# there exist n states/attacks (within any number of runs)
remark = "exactly"
addtxt(" (%s)" % remark,6)
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#---------------------------------------------------------------------------
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class ScytherRun(object):
def __init__(self,mainwin,mode):
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self.mainwin = mainwin
self.mode = mode
self.spdl = mainwin.control.GetValue()
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# Verification window
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self.verifywin = verifywin = VerificationWindow(mainwin,"Running Scyther %s process" % mode)
verifywin.Center()
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verifywin.Show(True)
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# start the thread
self.options = mainwin.settings.ScytherArguments(mode)
self.verified = False
verifywin.SetCursor(wx.StockCursor(wx.CURSOR_WAIT))
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t = ScytherThread(self)
t.start()
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# start the window and show until something happens
# if it terminates, this is a cancel, and should also kill the thread. (what happens to a spawned Scyther in that case?)
# if the thread terminames, it should close the window normally, and we end up here as well.
val = verifywin.ShowModal()
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if self.verified:
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# Scyther program is done (the alternative is that it was
# cancelled)
if self.scyther.errorcount == 0:
# Great, we verified stuff, progress to the claim report
title = "Scyther results : %s" % mode
self.resultwin = resultwin = ResultWindow(self,mainwin,title)
resultwin.Show(True)
def attackDone(attack,total,done):
if done < total:
txt = "Generating attack graphs (%i of %i done)." % (done,total)
else:
txt = "Done."
resultwin.SetStatusText(txt)
resultwin.Refresh()
def claimDone(claim):
if claim.button and len(claim.attacks) > 0:
claim.button.Enable()
resultwin.Refresh()
t = AttackThread(self,resultwin,claimDone,attackDone)
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t.start()
resultwin.thread = t
resultwin.Center()
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resultwin.Show(True)
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else:
# Darn, some errors. report.
title = "Scyther errors : %s" % mode
errorwin = ErrorWindow(mainwin,title,errors=self.scyther.errors)
errorwin.Center()
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val = errorwin.ShowModal()
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#---------------------------------------------------------------------------
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