- Started a new Ifparser.

2005-12-03 16:12:58 +00:00 · 2005-12-03 16:12:58 +00:00 · 290e5a8b5c
commit 290e5a8b5c
parent 8f222c9bb7
4 changed files with 557 additions and 30 deletions
--- a/scripts/if2spdl/If.py
+++ b/scripts/if2spdl/If.py
@ -0,0 +1,137 @@
+#!/usr/bin/python
+#
+#	If.py
+#
+#	Objects and stuff for the intermediate format
+#
+firstone = True
+
+class Atomic(list):
+	def __init__ (self,l,type=""):
+		list.__init__(self,l)
+		self.type = type
+	
+	def getType(self):
+		return self.type
+
+	def __str__(self):
+		return  "".join(self)
+
+	def __repr__(self):
+		return "Constant<" + str(self) + ">"
+
+class Special(Atomic):
+	def __init__ (self,x):
+		Atomic.__init__(self,[x],"special")
+
+class Message(list):
+	def __str__(self):
+		#return "".join(self)
+		res = ""
+		for s in self:
+			if res != "":
+				res += ","
+			res += str(s)
+		return res
+
+	def subType(self):
+		return "(generic)"
+
+	def __repr__(self):
+		return "Message" + self.subType() + "<" + str(self) + ">"
+
+class MsgList(list):
+	def __repr__(self):
+		return "Msglist<" + list.__repr__(self) + ">"
+
+class Fact(list):
+	def __repr__(self):
+		return "Fact<" + list.__repr__(self) + ">"
+
+class State(list):
+	def __repr__(self):
+		return "State<" + list.__repr__(self) + ">"
+
+class Label(object):
+	def __init__(self, name, category):
+		self.name = name
+		self.category = category
+	
+	def __str__(self):
+		return "lb=" + self.name + ",type=" + self.category
+
+	def __repr__(self):
+		return str(self)
+
+class Rule(object):
+	def __init__(self,left=None,right=None):
+		self.left = left
+		self.right = right
+		self.label = None
+	
+	def setLabel(self,label):
+		self.label = label
+	
+	def __str__(self):
+		res = "Rule:"
+		if self.label != None:
+			res += " (" + str(self.label) +")"
+		res += "\n"
+		res += str(self.left) + "\n"
+		res += "=>\n"
+		res += str(self.right) + "\n"
+		return res
+
+	def __repr__(self):
+		return str(self)
+
+class InitialRule(Rule):
+	def __str__(self):
+		return "Initial " + Rule.__str__(self)
+
+class MessageRule(Rule):
+	def __init__(self,l,r):
+		global firstone
+
+		Rule.__init__(self,l,r)
+		if firstone:
+			print str(self)
+			firstone = False
+
+
+	def __str__(self):
+		return "Message " + Rule.__str__(self)
+
+class GoalRule(Rule):
+	def __str__(self):
+		return "Goal " + Rule.__str__(self)
+
+class CorrespondenceRule(GoalRule):
+	def __init__(self, l):
+		GoalRule.__init__(self,l,None)
+	
+	def __str__(self):
+		return "Correspondence " + GoalRule.__str__(self)
+
+class SecrecyRule(GoalRule):
+	def __init__(self, l):
+		GoalRule.__init__(self,l,None)
+	
+	def __str__(self):
+		return "Secrecy " + GoalRule.__str__(self)
+
+class STSecrecyRule(GoalRule):
+	def __init__(self, l):
+		GoalRule.__init__(self,l,None)
+	
+	def __str__(self):
+		return "Short-term Secrecy " + GoalRule.__str__(self)
+
+class AuthenticateRule(GoalRule):
+	def __init__(self, l):
+		GoalRule.__init__(self,l,None)
+	
+	def __str__(self):
+		return "Authenticate " + GoalRule.__str__(self)
+
+
--- a/scripts/if2spdl/Ifparser.py
+++ b/scripts/if2spdl/Ifparser.py
@ -0,0 +1,273 @@
+#!/usr/bin/python
+
+# requires python-pyparsing module
+# http://pyparsing.sourceforge.net/
+
+from pyparsing import Literal, alphas, nums, Word, oneOf, Or, Group, \
+	restOfLine, Forward, Optional, delimitedList, alphanums,\
+	OneOrMore
+import If
+
+typedversion = False
+
+# Markers:
+#
+# 	TODO	stuff that still needs to be done.
+# 	DEVIANT	stuff that deviates from the original BNF specs in the
+# 		paper.
+# 	TEST	test things, remove later
+
+# Generate parser
+#
+# Takes a list of tokens, returns 
+def ruleParser ():
+	global typedversion
+
+	# ------------------------------------------------------
+	# Atomic
+	# ------------------------------------------------------
+
+	# Tokens
+	lbr = Literal("(").suppress()
+	rbr = Literal(")").suppress()
+	comma = Literal(",").suppress()
+	hash = Literal("#")
+	equ = Literal("=")
+	implies = Literal("=>").suppress()
+	dot = Literal(".").suppress()
+	eol = Literal("\n").suppress()
+
+	# Basic constructors
+	Alfabet= alphas+nums+"_$"
+	Number = Word(nums)
+
+	# Typeinfo/Constant
+	TypeInfo = oneOf ("mr nonce pk sk fu table")
+	Constant = Word(alphas,Alfabet)
+
+	# Time
+	nTime = Number
+	xTime = Literal("xTime")
+	sTime = Literal("s") + lbr + Group(Number) + rbr
+	Time = Or([nTime,xTime,sTime])
+
+	# Const
+	Const = Forward()
+	ConstC = Literal("c") + lbr + Constant + comma + Time + rbr
+	ConstF = Literal("c(ni,ni)")
+	Const << Or ([ Constant, ConstC, ConstF ])
+
+
+	# Two versions
+	Variable = Word("x",Alfabet)
+	if typedversion:
+		Variable = TypeInfo + lbr + Variable + rbr
+
+	# Optional prime
+	optprime = Optional(Literal("'"))
+
+	# Atomic
+	## DEVIANT : below there is an optprime after the atom. This
+	## is not in the BNF.
+	Atomic = Or([ TypeInfo + lbr + Const + rbr, Variable]) + optprime
+	Atomic.setParseAction(lambda s,l,t: [ If.Atomic(t) ])
+
+	### TEST
+	#print Const.parseString("Cas'")
+	#print Atomic.parseString("mr(Cas)'")
+	#print Atomic.parseString("nonce(Koen)")
+
+	# ------------------------------------------------------
+	# Messages
+	# ------------------------------------------------------
+	
+	# Base forward declaration
+	Message = Forward()
+
+
+	# Agents etc
+	Agent = Or ([Literal("mr") + lbr + Const + rbr, Variable])
+	KeyTable = Or ([Literal("table") + lbr + Const + rbr, Variable])
+	KeyTableApp = Literal("tb") + lbr + KeyTable + comma + Agent + rbr + optprime
+
+	# Crypto
+	pkterm = Literal("pk") + lbr + Const + rbr + optprime
+	varterm = Variable + optprime
+	Invertible = Or( [pkterm, KeyTableApp, varterm])
+	PublicCypher = Literal("crypt") + lbr + Invertible + comma + Message + rbr
+	XOR = Literal("rcrypt") + lbr + Message + comma + Message + rbr
+	SymmetricCypher = Literal("scrypt") + lbr + Message + comma + Message + rbr
+	futerm = Or([ Literal("fu") + lbr + Const + rbr, Variable ])
+	Function = Literal("funct") + lbr + futerm + comma + Message + rbr
+	
+	# Message composition
+	Concatenation = Literal("c") + lbr + Message + comma + Message + rbr
+	Composed = Or([ Concatenation, SymmetricCypher, XOR,
+			PublicCypher, Function, KeyTable, KeyTableApp ])
+	Message << Or ([Composed, Atomic])
+	Message.setParseAction(lambda s,l,t: [ If.Message(t) ])
+
+	### TEST
+	#print Message.parseString("nonce(c(Na,xTime))")
+
+	# ------------------------------------------------------
+	# Model of honest agents
+	# ------------------------------------------------------
+	
+	Boolean = Or ([ Literal("true"), Literal("false"), Variable ])
+	Session = Forward()
+	Session << Or ([ Literal("s") + lbr + Session + rbr, Number, Variable ])
+	MsgEtc = Literal("etc")
+	MsgEtc.setParseAction(lambda s,l,t: [ If.Message([ If.Special("etc") ]) ])
+	MsgVariable = Group(Variable)
+	MsgVariable.setParseAction(lambda s,l,t: [ If.Message([ If.Atomic([ t[0][0] ]) ]) ])
+
+	MsgList = Forward()
+	MsgComp = Literal("c") + lbr + Message + comma + MsgList + rbr
+	MsgComp.setParseAction(lambda s,l,t: [t[1]] + t[2])
+	MsgList << Or ([ MsgEtc, MsgVariable, MsgComp ])
+	MsgList.setParseAction(lambda s,l,t: [ If.MsgList(t) ])
+
+	Step = Or ([ Number, Variable ])
+
+	### TEST
+	#print Message.parseString("xKb")
+	#print MsgList.parseString("etc")
+	#print MsgList.parseString("c(xKb,etc)")
+	#print MsgList.parseString("c(xA,c(xB,c(xKa,c(xKa',c(xKb,etc)))))")
+
+	# Principal fact
+	Principal = Literal("w") + lbr + Step + comma + Agent + comma + Agent + comma + MsgList + comma + MsgList + comma + Boolean + comma + Session + rbr
+
+	# Message fact
+	MessageFact = Literal("m") + lbr + Step + comma + Agent + comma + Agent + comma + Agent + comma + Message + comma + Session + rbr
+
+	# Goal fact
+	Secret = Literal("secret") + lbr + Message + Literal("f") + lbr + Session + rbr + rbr
+	Give = Literal("give") + lbr + Message + Literal("f") + lbr + Session + rbr + rbr
+	Witness = Literal("witness") + lbr + Agent + comma + Agent + comma + Constant + comma + Message + rbr
+	Request = Literal("request") + lbr + Agent + comma + Agent + comma + Constant + comma + Message + rbr
+	GoalFact = Or ([ Secret, Give, Witness, Request ])
+	# Goal State
+	# It actually yields a rule (not a state per se)
+	Correspondence = Principal + dot + Principal
+	Correspondence.setParseAction(lambda s,l,t: [
+			If.CorrespondenceRule(t) ])
+	Secrecy = Literal("secret") + lbr + Literal("xsecret") + comma + Literal("f") + lbr + Session + rbr + rbr + dot + Literal("i") + lbr + Literal("xsecret") + rbr
+	Secrecy.setParseAction(lambda s,l,t: [ If.SecrecyRule(t) ])
+	STSecrecy = Literal("give(xsecret,f(xc)).secret(xsecret,f(xc))") + implies + Literal("i(xsecret)")
+	STSecrecy.setParseAction(lambda s,l,t: [
+		If.STSecrecyRule(t) ])
+	Authenticate = Literal("request") + lbr + Agent + comma + Agent + comma + Constant + comma + Message + rbr
+	Authenticate.setParseAction(lambda s,l,t: [ If.AuthenticateRule(t) ])
+	GoalState = Or ([ Correspondence, Secrecy, STSecrecy, Authenticate ])
+
+	# TimeFact
+	TimeFact = Literal("h") + lbr + Message + rbr
+
+	# Intruder knowledge
+	IntruderKnowledge = Literal("i") + lbr + Message + rbr
+	
+	# Facts and states
+	Fact = Or ([ Principal, MessageFact, IntruderKnowledge, TimeFact, Secret, Give, Witness, Request ])
+	Fact.setParseAction(lambda s,l,t: [ If.Fact(t) ])
+	State = Group(delimitedList (Fact, "."))	## From initial part of document, not in detailed BNF
+	State.setParseAction(lambda s,l,t: [ If.State(t) ])
+
+	# Rules
+	MFPrincipal = Or ([ MessageFact + dot + Principal, Principal ])
+	mr1 = Literal("h") + lbr + Literal("s") + lbr + Literal("xTime") + rbr + rbr + dot + MFPrincipal
+	mr2 = implies
+	mr3 = Literal("h") + lbr + Literal("xTime") + rbr + dot + MFPrincipal + Optional(dot + delimitedList(GoalFact, "."))
+	MessageRule = Group(mr1) + mr2 + Group(mr3)		## DEVIANT : BNF requires newlines
+	MessageRule.setParseAction(lambda s,l,t: [ If.MessageRule(t[0],t[1]) ])
+	InitialState = Literal("h") + lbr + Literal("xTime") + rbr + dot + State 	## DEVIANT : BNF requires newlines
+	InitialState.setParseAction(lambda s,l,t: [ If.InitialRule(t[2]) ])
+
+	# Intruder
+	IntruderRule = Literal("nogniet")
+
+	# Simplification
+	f_simplif = Literal("f") + lbr + Literal("s") + lbr + Literal ("xc") + rbr + rbr + implies + Literal("f") + lbr + Literal("xc") + rbr	## DEVIANT : EOL removed
+	matching_request = Witness + dot + Request + implies
+	no_auth_intruder = Request + implies
+	SimplificationRule = Or ([ f_simplif, matching_request, no_auth_intruder ])
+
+	# Compose all rules
+	Rule = Or([ InitialState, MessageRule, IntruderRule, GoalState, SimplificationRule ])
+
+	return Rule
+
+# IFParser
+# Does not work for the first line (typed/untyped)
+# Depends on ruleParser
+def ifParser():
+	
+	comma = Literal(",")
+	hash = Literal("#")
+	equal = Literal("=")
+
+	# Rules and labels
+	rulename = Word (alphanums + "_")
+	rulecategory = oneOf("Protocol_Rules Invariant_Rules Decomposition_Rules Intruder_Rules Init Goal")
+	label = hash + Literal("lb") + equal + rulename + comma + Literal("type") + equal + rulecategory
+	label.setParseAction(lambda s,l,t: [ If.Label(t[3],t[7]) ])
+	labeledrule = label + ruleParser()
+
+	def labeledruleAction(s,l,t):
+		rule = t[1]
+		if type(rule) == "Rule":
+			rule.setLabel(t[0])
+		return [rule]
+
+	labeledrule.setParseAction(labeledruleAction)
+
+	# A complete file
+	parser = OneOrMore(labeledrule)
+	parser.ignore("##" + restOfLine)
+
+	return parser
+
+# Determine (un)typedness from this line
+def typeSwitch(line):
+	try:
+		global typedversion
+
+		typeflag = Literal("#") + "option" + Literal("=") + oneOf ("untyped","typed")
+		res = typeflag.parseString(line)
+		if res[3] == "untyped":
+			typedversion = False
+		elif res[3] == "typed":
+			typeversion = True
+		else:
+			print "Cannot determine whether typed or untyped."
+			raise ParseException
+	
+	except:
+		print "Unexpected error while determining (un)typedness of the line", line
+
+	str = "Detected "
+	if not typedversion:
+		str += "un"
+	str += "typed version."
+	print str
+
+# Parse an entire file, including the first one
+def linesParse(lines):
+
+	typeSwitch(lines[0])
+
+	parser = ifParser()
+	result = parser.parseString("".join( lines[1:]))
+	#print result
+
+# Main code
+def main():
+	file = open("NSPK_LOWE.if", "r")
+	linesParse(file.readlines())
+	file.close()
+
+
+if __name__ == '__main__':
+	main()
+
--- a/scripts/if2spdl/Session.vim
+++ b/scripts/if2spdl/Session.vim
@ -30,7 +30,7 @@ set incsearch
 set nojoinspaces
 set laststatus=2
 set listchars=tab:>.,trail:$
-set makeprg=./parser.py
+set makeprg=./Ifparser.py
 set printencoding=ascii
 set ruler
 set scrolloff=2
@ -50,15 +50,24 @@ if expand('%') == '' && !&modified && line('$') <= 1 && getline(1) == ''
  let s:wipebuf = bufnr('%')
 endif
 set shortmess=aoO
-badd +10 if2spdl.py
-badd +0 parser.py
-args if2spdl.py
-edit parser.py
+badd +7 If.py
+badd +2 Term.py
+badd +11 if2spdl.py
+badd +11 parser.py
+badd +0 Ifparser.py
+args If.py
+edit Ifparser.py
 set splitbelow splitright
+wincmd _ | wincmd |
+vsplit
+1wincmd h
+wincmd w
 set nosplitbelow
 set nosplitright
 wincmd t
 set winheight=1 winwidth=1
+exe 'vert 1resize ' . ((&columns * 79 + 79) / 158)
+exe 'vert 2resize ' . ((&columns * 78 + 79) / 158)
 argglobal
 setlocal noarabic
 setlocal autoindent
@ -150,16 +159,119 @@ setlocal nowinfixheight
 setlocal wrap
 setlocal wrapmargin=0
 silent! normal! zE
-let s:l = 246 - ((33 * winheight(0) + 27) / 55)
+let s:l = 207 - ((32 * winheight(0) + 27) / 55)
 if s:l < 1 | let s:l = 1 | endif
 exe s:l
 normal! zt
-246
-normal! 01l
+207
+normal! 0
+wincmd w
+argglobal
+edit If.py
+setlocal noarabic
+setlocal autoindent
+setlocal autoread
+setlocal nobinary
+setlocal bufhidden=
+setlocal buflisted
+setlocal buftype=
+setlocal nocindent
+setlocal cinkeys=0{,0},0),:,0#,!^F,o,O,e
+setlocal cinoptions=
+setlocal cinwords=if,else,while,do,for,switch
+setlocal comments=s1:/*,mb:*,ex:*/,://,b:#,:%,:XCOMM,n:>,fb:-
+setlocal commentstring=/*%s*/
+setlocal complete=.,w,b,u,t,i
+setlocal completefunc=
+setlocal nocopyindent
+setlocal define=
+setlocal dictionary=
+setlocal nodiff
+setlocal equalprg=
+setlocal errorformat=
+setlocal noexpandtab
+if &filetype != 'python'
+setlocal filetype=python
+endif
+setlocal foldcolumn=0
+setlocal foldenable
+setlocal foldexpr=0
+setlocal foldignore=#
+setlocal foldlevel=0
+setlocal foldmarker={{{,}}}
+setlocal foldmethod=manual
+setlocal foldminlines=1
+setlocal foldnestmax=20
+setlocal foldtext=foldtext()
+setlocal formatoptions=cqrt
+setlocal formatlistpat=^\\s*\\d\\+[\\]:.)}\\t\ ]\\s*
+setlocal grepprg=
+setlocal iminsert=2
+setlocal imsearch=2
+setlocal include=
+setlocal includeexpr=
+setlocal indentexpr=GetPythonIndent(v:lnum)
+setlocal indentkeys=0{,0},:,0#,!^F,o,O,e,<:>,=elif,=except
+setlocal noinfercase
+setlocal iskeyword=@,48-57,_,192-255
+setlocal keymap=
+setlocal keywordprg=
+setlocal nolinebreak
+setlocal nolisp
+setlocal nolist
+setlocal makeprg=
+setlocal matchpairs=(:),{:},[:]
+setlocal modeline
+setlocal modifiable
+setlocal nrformats=octal,hex
+setlocal nonumber
+setlocal numberwidth=4
+setlocal omnifunc=
+setlocal path=
+setlocal nopreserveindent
+setlocal nopreviewwindow
+setlocal quoteescape=\\
+setlocal noreadonly
+setlocal norightleft
+setlocal rightleftcmd=search
+setlocal noscrollbind
+setlocal shiftwidth=8
+setlocal noshortname
+setlocal nosmartindent
+setlocal softtabstop=0
+setlocal nospell
+setlocal spellcapcheck=[.?!]\\_[\\])'\"\	\ ]\\+
+setlocal spellfile=
+setlocal spelllang=en
+setlocal statusline=
+setlocal suffixesadd=
+setlocal swapfile
+setlocal synmaxcol=3000
+if &syntax != 'python'
+setlocal syntax=python
+endif
+setlocal tabstop=8
+setlocal tags=
+setlocal textwidth=72
+setlocal thesaurus=
+setlocal nowinfixheight
+setlocal wrap
+setlocal wrapmargin=0
+silent! normal! zE
+let s:l = 56 - ((48 * winheight(0) + 27) / 55)
+if s:l < 1 | let s:l = 1 | endif
+exe s:l
+normal! zt
+56
+normal! 025l
+wincmd w
+2wincmd w
 if exists('s:wipebuf')
  exe 'bwipe ' . s:wipebuf
 endif
 unlet! s:wipebuf
+exe 'vert 1resize ' . ((&columns * 79 + 79) / 158)
+exe 'vert 2resize ' . ((&columns * 78 + 79) / 158)
 set winheight=1 winwidth=20 shortmess=at
 let s:sx = expand("<sfile>:p:r")."x.vim"
 if file_readable(s:sx)
--- a/scripts/if2spdl/parser.py
+++ b/scripts/if2spdl/parser.py
@ -7,6 +7,7 @@ from pyparsing import Literal, alphas, nums, Word, oneOf, Or, Group, \
 	restOfLine, Forward, Optional, delimitedList, alphanums,\
 	OneOrMore
 import Term
+import If

 typedversion = False

@ -28,13 +29,13 @@ def ruleParser ():
 	# ------------------------------------------------------

 	# Tokens
-	lbr = Literal("(").suppress()
-	rbr = Literal(")").suppress()
-	comma = Literal(",").suppress()
-	hash = Literal("#").suppress()
-	equ = Literal("=").suppress()
-	implies = Literal("=>").suppress()
-	dot = Literal(".").suppress()
+	lbr = Literal("(")
+	rbr = Literal(")")
+	comma = Literal(",")
+	hash = Literal("#")
+	equ = Literal("=")
+	implies = Literal("=>")
+	dot = Literal(".")
 	eol = Literal("\n").suppress()

 	# Basic constructors
@ -46,25 +47,25 @@ def ruleParser ():
 	TypeInfo = oneOf ("mr nonce pk sk fu table")
 	TypeInfo.setParseAction(lambda s,l,t: [ "typeinfo", Term.TermConstant(t[0]) ])
 	Constant = Word(alphas,Alfabet)
-	Constant.setParseAction(lambda s,l,t: [ "constant", Term.TermConstant(t[0]) ])
+	Constant.setParseAction(lambda s,l,t: [ Term.TermConstant(t[0]) ])

 	# Time
-	nTime = Group(Number)
-	nTime.setParseAction(lambda s,l,t: ["n", t[0] ])
+	nTime = Number
 	xTime = Literal("xTime")
-	xTime.setParseAction(lambda s,l,t: ["x", t[0] ])
 	sTime = Literal("s").suppress() + lbr + Group(Number) + rbr
-	sTime.setParseAction(lambda s,l,t: ["s", t[0] ])
 	Time = Or([nTime,xTime,sTime])
-	Time.setParseAction(lambda s,l,t: ["time", t[0],t[1] ])

 	# Const
 	Const = Forward()
-	Const << Or ([ Constant, Literal("c") + lbr + Constant + comma + Time + rbr, Literal("c(ni,ni)") ])
+	ConstC = Literal("c") + lbr + Constant + comma + Time + rbr
+	ConstF = Literal("c(ni,ni)")
+	Const << Or ([ Constant, ConstC, ConstF ])
+
+	Const.setParseAction(lambda s,l,t: [ If.Constant("".join(t)) ])

 	# Two versions
 	Variable = Word("x",Alfabet)
-	Variable.setParseAction(lambda s,l,t: [ "v", Term.TermVariable(t[0],None) ])
+	Variable.setParseAction(lambda s,l,t: [ Term.TermVariable(t[0]+"V",None) ])
 	if typedversion:
 		Variable = TypeInfo + lbr + Variable + rbr

@ -99,6 +100,7 @@ def ruleParser ():
 	varterm = Variable + optprime
 	Invertible = Or( [pkterm, KeyTableApp, varterm])
 	PublicCypher = Literal("crypt") + lbr + Invertible + comma + Message + rbr
+	PublicCypher.setParseAction(lambda s,l,t: [ Term.TermEncrypt(t[2],t[1]) ])
 	XOR = Literal("rcrypt") + lbr + Message + comma + Message + rbr
 	SymmetricCypher = Literal("scrypt") + lbr + Message + comma + Message + rbr
 	futerm = Or([ Literal("fu") + lbr + Const + rbr, Variable ])
@ -106,6 +108,7 @@ def ruleParser ():
 	
 	# Message composition
 	Concatenation = Literal("c") + lbr + Message + comma + Message + rbr
+	Concatenation.setParseAction(lambda s,l,t: [ Term.TermTuple(t[1],t[2]) ])
 	Composed = Or([ Concatenation, SymmetricCypher, XOR,
 			PublicCypher, Function, KeyTable, KeyTableApp ])
 	Message << Or ([Composed, Atomic])
@ -136,6 +139,7 @@ def ruleParser ():

 	# Principal fact
 	Principal = Literal("w") + lbr + Step + comma + Agent + comma + Agent + comma + MsgList + comma + MsgList + comma + Boolean + comma + Session + rbr
+	Principal.setParseAction(lambda s,l,t: [ "Principal", t])

 	# Message fact
 	MessageFact = Literal("m") + lbr + Step + comma + Agent + comma + Agent + comma + Agent + comma + Message + comma + Session + rbr
@ -167,7 +171,7 @@ def ruleParser ():
 	mr1 = Literal("h") + lbr + Literal("s") + lbr + Literal("xTime") + rbr + rbr + dot + MFPrincipal
 	mr2 = implies
 	mr3 = Literal("h") + lbr + Literal("xTime") + rbr + dot + MFPrincipal + Optional(dot + delimitedList(GoalFact, "."))
-	MessageRule = mr1 + mr2 + mr3		## DEVIANT : BNF requires newlines
+	MessageRule = Group(mr1) + mr2 + Group(mr3)		## DEVIANT : BNF requires newlines
 	InitialState = Literal("h") + lbr + Literal("xTime") + rbr + dot + State 	## DEVIANT : BNF requires newlines

 	# Intruder
@ -200,13 +204,14 @@ def ifParser():
 	labeledrule = Group(label) + Group(ruleParser())

 	def labeledruleAction(s,l,t):
-		print "-----------------"
-		print "- Detected rule -"
-		print "-----------------"
+		if t[0][3] == "Protocol_Rules":
+			print "-----------------"
+			print "- Detected rule -"
+			print "-----------------"

-		print t[0]
-		print t[1]
-		print
+			print t[0]
+			print t[1]
+			print

 	labeledrule.setParseAction(labeledruleAction)