528 lines
16 KiB
Python
528 lines
16 KiB
Python
#!/usr/bin/python
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#---------------------------------------------------------------------------
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""" Import externals """
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import wx
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import os
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import sys
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import re
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import threading
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import StringIO
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#---------------------------------------------------------------------------
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""" Import scyther components """
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import Scyther.Scyther
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import Scyther.Error
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""" Import scyther-gui components """
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import Tempfile
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import Preference
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import Attackwindow
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import Icon
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import Error
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#---------------------------------------------------------------------------
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if Preference.usePIL():
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import Image
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#---------------------------------------------------------------------------
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class ScytherThread(threading.Thread):
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"""
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Apply Scyther algorithm to input and retrieve results
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"""
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# Override Thread's __init__ method to accept the parameters needed:
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def __init__ ( self, spdl, options="", callback=None ):
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self.spdl = spdl
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self.options = options
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self.callback = callback
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threading.Thread.__init__ ( self )
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def run(self):
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(scyther, claims, summary) = self.claimResults()
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# Results are done (claimstatus can be reported)
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if self.callback:
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wx.CallAfter(self.callback, scyther, claims, summary)
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def claimResults(self):
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""" Convert spdl to result (using Scyther)
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"""
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scyther = Scyther.Scyther.Scyther()
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scyther.options = self.options
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scyther.setInput(self.spdl)
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# verification start
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claims = scyther.verify()
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summary = str(scyther)
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return (scyther, claims, summary)
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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
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background """
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# Override Thread's __init__ method to accept the parameters needed:
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def __init__ ( self, parent, resultwin, callbackclaim=None,callbackattack=None,callbackdone=None ):
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self.parent = parent
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self.resultwin = resultwin
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self.callbackclaim = callbackclaim
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self.callbackattack = callbackattack
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self.callbackdone = callbackdone
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self.totalattacks = 0
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for cl in self.parent.claims:
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for attack in cl.attacks:
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self.totalattacks += 1
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threading.Thread.__init__ ( self )
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def run(self):
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# create the images in the background
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# when the images of a claim are done, callback is called with
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# the claim
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self.makeImages()
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def makeImages(self):
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""" create images """
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done = 0
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for cl in self.parent.claims:
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for attack in cl.attacks:
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self.makeImage(attack)
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done += 1
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if self.callbackattack:
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wx.CallAfter(self.callbackattack,attack,self.totalattacks,done)
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if self.callbackclaim:
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wx.CallAfter(self.callbackclaim,cl)
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if self.callbackdone:
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wx.CallAfter(self.callbackdone)
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def writeGraph(self,txt,fp):
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EDGE = 0
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NODE = 1
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DEFAULT = 2
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ALL = 3
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def graphLine(txt):
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fp.write("\t%s;\n" % (txt))
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def setAttr(atxt,EdgeNodeDefAll=ALL):
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if EdgeNodeDefAll == ALL:
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setAttr(atxt,EDGE)
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setAttr(atxt,NODE)
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setAttr(atxt,DEFAULT)
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else:
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if EdgeNodeDefAll == EDGE:
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edge = "edge"
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elif EdgeNodeDefAll == NODE:
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edge = "node"
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else:
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graphLine("%s" % atxt)
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return
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graphLine("%s [%s]" % (edge,atxt))
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# write all graph lines but add layout modifiers
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for l in txt.splitlines():
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fp.write(l)
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if l.startswith("digraph"):
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# Write additional stuff for this graph
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#
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# [CC][x] This dpi setting messed up quite a bit
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#graphLine("dpi=96")
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graphLine("rankdir=TB")
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graphLine("nodesep=0.1")
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graphLine("ranksep=0.001")
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graphLine("mindist=0.1")
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if sys.platform.startswith("lin"):
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setAttr("fontname=\"Helvetica\"")
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else:
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setAttr("fontname=\"Arial\"")
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if self.parent and self.parent.mainwin:
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fontsize = self.parent.mainwin.settings.fontsize
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setAttr("fontsize=%s" % fontsize)
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setAttr("height=\"0.1\"",NODE)
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setAttr("width=\"1.0\"",NODE)
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setAttr("margin=\"0.3,0.03\"",NODE)
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def makeImage(self,attack):
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""" create image for this particular attack """
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if Preference.usePIL():
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# If we have the PIL library, we can do postscript! great
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# stuff.
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type = "ps"
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ext = ".ps"
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else:
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# Ye olde pnge file
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type = "png"
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ext = ".png"
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# command to write to temporary file
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(fd2,fpname2) = Tempfile.tempcleaned(ext)
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f = os.fdopen(fd2,'w')
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cmd = "dot -T%s" % (type)
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# execute command
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cin,cout = os.popen2(cmd,'b')
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self.writeGraph(attack.scytherDot,cin)
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cin.close()
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for l in cout.read():
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f.write(l)
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cout.close()
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f.flush()
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f.close()
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# if this is done, store and report
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attack.filetype = type
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attack.file = fpname2 # this is where the file name is stored
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#---------------------------------------------------------------------------
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class VerificationWindow(wx.Dialog):
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def __init__(
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self, parent, 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.Dialog.__init__(self,parent,-1,title,pos,size,style)
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sizer = wx.BoxSizer(wx.VERTICAL)
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label = wx.StaticText(self, -1, "Verifying protocol description")
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sizer.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
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line = wx.StaticLine(self, -1, size=(20,-1), style=wx.LI_HORIZONTAL)
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sizer.Add(line, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
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btnsizer = wx.StdDialogButtonSizer()
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btn = wx.Button(self, wx.ID_CANCEL)
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btnsizer.AddButton(btn)
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btnsizer.Realize()
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sizer.Add(btnsizer, 0, wx.ALIGN_CENTER_VERTICAL|wx.ALL|wx.ALIGN_CENTER, 5)
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self.SetSizer(sizer)
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sizer.Fit(self)
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#---------------------------------------------------------------------------
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class ErrorWindow(wx.Dialog):
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def __init__(
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self, parent, title, pos=wx.DefaultPosition, size=wx.DefaultSize,
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style=wx.DEFAULT_DIALOG_STYLE,errors=[]
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):
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wx.Dialog.__init__(self,parent,-1,title,pos,size,style)
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sizer = wx.BoxSizer(wx.VERTICAL)
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label = wx.StaticText(self, -1, "Errors")
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sizer.Add(label, 0, wx.ALIGN_LEFT|wx.ALL, 5)
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line = wx.StaticLine(self, -1, size=(20,-1), style=wx.LI_HORIZONTAL)
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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)
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line = wx.StaticLine(self, -1, size=(20,-1), style=wx.LI_HORIZONTAL)
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sizer.Add(line, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.RIGHT|wx.TOP, 5)
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btnsizer = wx.StdDialogButtonSizer()
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btn = wx.Button(self, wx.ID_OK)
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btnsizer.AddButton(btn)
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btnsizer.Realize()
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sizer.Add(btnsizer, 0, wx.ALIGN_CENTER_VERTICAL|wx.ALL|wx.ALIGN_CENTER, 5)
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self.SetSizer(sizer)
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sizer.Fit(self)
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#---------------------------------------------------------------------------
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class ResultWindow(wx.Frame):
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"""
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Displays the claims status and contains buttons to show the actual
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attack graphs
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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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self.SetBackgroundColour('Default')
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Icon.ScytherIcon(self)
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self.parent = parent
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self.thread = None
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self.Bind(wx.EVT_CLOSE, self.onCloseWindow)
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self.CreateStatusBar()
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self.BuildTable()
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def onViewButton(self,evt):
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btn = evt.GetEventObject()
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w = Attackwindow.AttackWindow(btn.claim)
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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
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self.parent.claims = None
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self.Destroy()
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def BuildTable(self):
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# Now continue with the normal construction of the dialog
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# contents
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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(0,0)
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#self.grid = grid = wx.GridBagSizer(7,1+len(claims))
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def titlebar(x,title,width=1):
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txt = wx.StaticText(self,-1,title)
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font = wx.Font(14,wx.NORMAL,wx.NORMAL,wx.BOLD)
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txt.SetFont(font)
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grid.Add(txt,(0,x),(1,width),wx.ALL,10)
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titlebar(0,"Claim",4)
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titlebar(4,"Status",2)
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titlebar(6,"Comments",1)
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self.lastprot = None
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self.lastrole = None
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views = 0
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for index in range(0,len(claims)):
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views += self.BuildClaim(grid,claims[index],index+1)
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if views > 0:
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titlebar(7,"Classes",1)
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self.SetSizer(grid)
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self.Fit()
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def BuildClaim(self,grid,cl,ypos):
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# a support function
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def addtxt(txt,column):
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grid.Add(wx.StaticText(self,-1,txt),(ypos,column),(1,1),wx.ALIGN_CENTER_VERTICAL|wx.ALL,10)
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n = len(cl.attacks)
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xpos = 0
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# protocol, role, label
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prot = str(cl.protocol)
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showP = False
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showR = False
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if prot != self.lastprot:
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self.lastprot = prot
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showP = True
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showR = True
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role = str(cl.role)
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if role != self.lastrole:
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self.lastrole = role
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showR = True
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if showP:
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addtxt(prot,xpos)
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if showR:
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addtxt(role,xpos+1)
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xpos += 2
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# claim id
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addtxt(str(cl.id),xpos)
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xpos += 1
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# claim parameters
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claimdetails = str(cl.claimtype)
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if cl.parameter:
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claimdetails += " %s" % (cl.parameter)
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addtxt(claimdetails + " ",xpos)
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xpos += 1
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# button for ok/fail
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if None:
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# old style buttons (but they looked ugly on windows)
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tsize = (16,16)
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if cl.okay:
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bmp = wx.ArtProvider_GetBitmap(wx.ART_TICK_MARK,wx.ART_CMN_DIALOG,tsize)
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else:
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bmp = wx.ArtProvider_GetBitmap(wx.ART_CROSS_MARK,wx.ART_CMN_DIALOG,tsize)
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if not bmp.Ok():
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bmp = wx.EmptyBitmap(tsize)
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bmpfield = wx.StaticBitmap(self,-1,bmp)
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grid.Add(bmpfield,(ypos,xpos),(1,1),wx.ALIGN_CENTER_VERTICAL|wx.ALL,10)
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else:
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# new style text control Ok/Fail
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rankc = cl.getColour()
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rankt = cl.getOkay()
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txt = wx.StaticText(self,-1,rankt)
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font = wx.Font(11,wx.NORMAL,wx.NORMAL,wx.BOLD)
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txt.SetFont(font)
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txt.SetForegroundColour(rankc)
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grid.Add(txt,(ypos,xpos),(1,1),wx.ALL,10)
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xpos += 1
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# verified?
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vt = cl.getVerified()
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if vt:
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addtxt(vt,xpos)
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xpos += 1
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# remark something
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addtxt(cl.getComment(),xpos)
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xpos += 1
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# add view button (enabled later if needed)
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if n > 0:
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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,xpos),(1,1),wx.ALIGN_CENTER_VERTICAL|wx.ALL,5)
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cl.button.Disable()
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if n > 0:
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# Aha, something to show
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self.Bind(wx.EVT_BUTTON, self.onViewButton,cl.button)
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else:
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cl.button = None
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xpos += 1
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# Return 1 if there is a view possible
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if n > 0:
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return 1
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else:
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return 0
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#---------------------------------------------------------------------------
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class ScytherRun(object):
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def __init__(self,mainwin,mode):
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self.mainwin = mainwin
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self.mode = mode
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self.spdl = mainwin.control.GetValue()
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self.verified = False
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self.options = mainwin.settings.ScytherArguments(mode)
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self.main()
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def main(self):
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"""
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Start process
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"""
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title = "Running Scyther %s process" % self.mode
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# start the window and show until something happens
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# if it terminates, this is a cancel, and should also kill the thread. (what happens to a spawned Scyther in that case?)
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# if the thread terminames, it should close the window normally, and we end up here as well.
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#val = self.verifywin.ShowModal()
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self.verifywin = VerificationWindow(self.mainwin,title)
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self.verifywin.Center()
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self.verifywin.Show(True)
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# Check sanity of Scyther thing here (as opposed to the thread)
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# which makes error reporting somewhat easier
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try:
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Scyther.Scyther.Check()
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except Scyther.Error.BinaryError, e:
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# e.file is the supposed location of the binary
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text = "Could not find Scyther binary at\n%s" % (e.file)
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Error.ShowAndExit(text)
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# start the thread
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self.verifywin.SetCursor(wx.StockCursor(wx.CURSOR_WAIT))
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t = ScytherThread(self.spdl, self.options, self.verificationDone)
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t.start()
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# after verification, we proceed to the callback below...
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def verificationDone(self, scyther, claims, summary):
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"""
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This is where we end up after a callback from the thread, stating that verification succeeded.
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"""
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self.scyther = scyther
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self.claims = claims
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self.summary = summary
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self.verified = True
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self.verifywin.Close()
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# Process the claims
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if self.scyther.errorcount == 0:
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self.verificationOkay()
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else:
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self.verificationErrors()
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def verificationOkay(self):
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# Great, we verified stuff, progress to the claim report
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title = "Scyther results : %s" % self.mode
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self.resultwin = resultwin = ResultWindow(self,self.mainwin,title)
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def attackDone(attack,total,done):
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if resultwin:
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txt = "Generating attack graphs (%i of %i done)." % (done,total)
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resultwin.SetStatusText(txt)
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#resultwin.Refresh()
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def claimDone(claim):
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if resultwin:
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if claim.button and len(claim.attacks) > 0:
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claim.button.Enable()
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def allDone():
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if resultwin:
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resultwin.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))
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resultwin.SetStatusText("Done.")
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resultwin.Center()
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resultwin.Show(True)
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resultwin.SetCursor(wx.StockCursor(wx.CURSOR_ARROWWAIT))
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wx.Yield()
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t = AttackThread(self,resultwin,claimDone,attackDone,allDone)
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t.start()
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resultwin.thread = t
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def verificationErrors(self):
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"""
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Verification process generated errors. Show them.
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"""
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title = "Scyther errors : %s" % self.mode
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errorwin = ErrorWindow(self.mainwin,title,errors=self.scyther.errors)
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errorwin.Center()
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val = errorwin.ShowModal()
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#---------------------------------------------------------------------------
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# vim: set ts=4 sw=4 et list lcs=tab\:>-:
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