145 lines
3.7 KiB
Python
145 lines
3.7 KiB
Python
#
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# Claim
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#
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import Term
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def stateDescription(okay,n=1,caps=False):
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if okay:
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s = "trace class"
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if n != 1:
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s += "es"
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else:
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s = "attack"
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if n != 1:
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s += "s"
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if caps:
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s = s[0].upper() + s[1:]
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return s
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class Claim(object):
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def __init__(self):
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self.id = None # a unique id string, consisting of 'protocol,label'
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self.claimtype = None
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self.label = None
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self.shortlabel = None
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self.protocol = None
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self.role = None
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self.parameter = None
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self.failed = 0
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self.count = 0
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self.states = 0
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self.complete = False
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self.timebound = False
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self.attacks = []
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self.state = False # if true, it is a state, not an attack
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self.okay = None # true if good, false if bad
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# derived info
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self.foundstates = False
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self.foundproof = False
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def analyze(self):
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# determine short label
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# We need the rightmost thingy here
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label = self.label
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while isinstance(label,Term.TermTuple):
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label = label[1]
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self.shortlabel = label
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# determine id
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self.id = "%s,%s" % (self.protocol,self.shortlabel)
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# some additional properties
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if str(self.claimtype) == 'Reachable':
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self.state = True
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if self.failed > 0:
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self.foundstates = True
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if self.complete:
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self.foundproof = True
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# status
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# normally, with attacks, okay means none
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self.okay = (self.failed == 0)
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if self.state:
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# but the logic reverses when it is states and not
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# attacks...
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self.okay = (not self.okay)
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def stateName(self,count=1,caps=False):
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return stateDescription(self.state,count,caps)
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def getComment(self):
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"""
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returns a sentence describing the results for this claim
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"""
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n = len(self.attacks)
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atxt = self.stateName(n)
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remark = ""
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if not self.complete:
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if n == 0:
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# no attacks, no states within bounds
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remark = "No %s within bounds" % (atxt)
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else:
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# some attacks/states within bounds
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remark = "At least %i %s" % (n,atxt)
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else:
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if n == 0:
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# no attacks, no states
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remark = "No %s" % (atxt)
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else:
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# there exist n states/attacks (within any number of runs)
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remark = "Exactly %i %s" % (n,atxt)
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return remark + "."
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def getVerified(self):
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"""
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returns an element of [None,'Verified','Falsified']
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"""
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n = len(self.attacks)
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if self.state:
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# this is about reachability
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if n > 0:
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return "Verified"
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else:
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if self.complete:
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return "Falsified"
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else:
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# this is about attacks
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if n > 0:
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return "Falsified"
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else:
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if self.complete:
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return "Verified"
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return None
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def __str__(self):
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"""
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Resulting string
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"""
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s = "claim id [%s]" % (self.id)
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s+= " " + str(self.claimtype)
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if self.parameter:
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s+= " " + str(self.parameter)
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# determine status
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s+= " : "
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if self.okay:
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s+= "[Ok] "
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else:
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s+= "[Fail] "
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s+= " %i " % (self.failed)
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s+= self.stateName(self.failed)
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vt = self.getVerified()
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if vt:
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s+= " (%s)" % vt
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s+= " [%s]" % self.getComment()
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return s
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