138 lines
5.4 KiB
Standard ML
138 lines
5.4 KiB
Standard ML
(*****************************************************************************
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* Isabelle-OFMC --- Connecting OFMC and Isabelle/HOL
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*
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* ofmc_abstraction.sml ---
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* This file is part of Isabelle-OFMC.
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*
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* Copyright (c) 2009 Achim D. Brucker, Germany
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************)
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(* $Id: ofmc_abstraction.sml 929 2009-11-01 22:37:06Z brucker $ *)
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structure ofmc_abstraction =
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struct
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open ofmc_connector
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open OfmcFp
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datatype CMsg = CVariable of string * string
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| COperator of string * string * CMsg list
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| Abstraction of CMsg * CMsg
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datatype CFact = CState of string * CMsg list
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| CIknows of CMsg
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| CAttack of CMsg
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| CWitness of CMsg list
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| CRequest of CMsg list
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| CSecret of CMsg list
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| CFact of string * CMsg
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| CNotEqual of CMsg * CMsg
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exception error of string
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fun mk_unique [] = []
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| mk_unique (x::xs) = if (List.exists (fn e => e = x) xs) then (mk_unique xs) else (x::(mk_unique xs))
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fun type_abstraction ofmcfp t =
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let
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val abs = abstractions_of ofmcfp
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val types = sel_types_of t ofmcfp
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fun decl_of (Atom a, Atom a') = "\""^a^"\" \"nat\""
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| decl_of (Operator (opname,_), Atom a) = "\""^opname^"\" \"Msg\" \"nat\""
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fun is_t (_,Atom a) = if (List.exists (fn n => (n=a)) types) then true else false
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| is_t (_,_) = false
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fun name_of (Atom n, _ ) = n
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| name_of (Operator (n,_), _) = n
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fun is_not_abs s = if (List.exists (fn a => ((name_of a) =s)) abs) then false else true
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val abs_t = List.filter is_t abs
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fun is_not_t n = if (List.exists (fn a => (name_of a = n)) abs_t)
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then false else true
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val abs_nott = List.filter is_not_t types
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in
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case t of
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"Function" => mk_unique (map (fn x => "\""^x^"\" \"Msg\"") (List.filter is_not_abs types))
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| "Number" => mk_unique ((map decl_of abs_t)@(map (fn a => "\""^(a)^"\"" ) abs_nott))
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| _ => mk_unique ((map decl_of abs_t))
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end
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fun check_abstraction ofmcfp s =
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let
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fun name_of (Operator(n,_)) = if (String.isPrefix "__" n)
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then String.substring(n,2,(String.size n)-2)
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else n
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| name_of (Atom (n)) = if (String.isPrefix "__" n)
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then String.substring(n,2,(String.size n)-2)
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else n
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val abstractions = List.filter (fn (a,b) => (name_of a) = s) (abstractions_of ofmcfp)
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in
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case abstractions of
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[] => NONE
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| ((a,b)::xs) => SOME ("Abs_"^(name_of b))
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end
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fun deabstractMsg abstractions (Atom s) = (case check_abstraction abstractions s of
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NONE => CVariable(s,"")
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| SOME a => Abstraction(COperator(s,"",[]),CVariable(a,"")))
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| deabstractMsg abstractions (Operator(s,ms)) = (case check_abstraction abstractions s of
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NONE => COperator(s,"", map (deabstractMsg abstractions) ms)
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| SOME a => Abstraction(COperator(s,"", map (deabstractMsg abstractions) ms),
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CVariable(a,"")))
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fun deabstractFact abstractions (State (n,ms)) = (CState (n, map (deabstractMsg abstractions) ms))
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| deabstractFact abstractions (Iknows m) = (CIknows (deabstractMsg abstractions m))
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| deabstractFact abstractions (Attack m) = (CAttack (deabstractMsg abstractions m))
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| deabstractFact abstractions (Witness ms) = (CWitness (map (deabstractMsg abstractions) ms))
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| deabstractFact abstractions (Request ms) = (CRequest (map (deabstractMsg abstractions) ms))
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| deabstractFact abstractions (Secret ms) = (CSecret (map (deabstractMsg abstractions) ms))
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| deabstractFact abstractions (Fact (n,m)) = (CFact (n, deabstractMsg abstractions m))
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| deabstractFact abstractions (NotEqual (n,m)) = (CNotEqual (deabstractMsg abstractions n, deabstractMsg abstractions m))
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| deabstractFact _ _ = raise (error "unknown abstract in deabstractFAct")
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end
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