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(* Copyright (c) 2009-2010, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure MarshalCheck :> MARSHAL_CHECK = struct
open Core
structure U = CoreUtil
structure E = ErrorMsg
structure PK = struct
open Order
type ord_key = string * string
fun compare ((m1, x1), (m2, x2)) =
join (String.compare (m1, m2),
fn () => String.compare (x1, x2))
end
structure PS = BinarySetFn(PK)
structure PS = struct
open PS
fun toString' (m, x) = m ^ "." ^ x
fun toString set =
case PS.listItems set of
[] => "{}"
| [x] => toString' x
| x :: xs => List.foldl (fn (x, s) => s ^ ", " ^ toString' x) (toString' x) xs
end
structure IM = IntBinaryMap
fun check file =
let
fun kind (_, st) = st
fun con cmap (c, st) =
case c of
CFfi mx =>
if Settings.mayClientToServer mx then
st
else
PS.add (st, mx)
| CNamed n =>
(case IM.find (cmap, n) of
NONE => st
| SOME st' => PS.union (st, st'))
| _ => st
fun sins cmap = U.Con.fold {kind = kind, con = con cmap} PS.empty
fun decl (d, (cmap, emap)) =
case d of
DCon (_, n, _, c) => (IM.insert (cmap, n, sins cmap c), emap)
| DDatatype dts =>
(foldl (fn ((_, n, _, xncs), cmap) =>
IM.insert (cmap, n, foldl (fn ((_, _, co), s) =>
case co of
NONE => s
| SOME c => PS.union (s, sins cmap c))
PS.empty xncs)) cmap dts,
emap)
| DVal (_, n, t, _, tag) => (cmap, IM.insert (emap, n, (t, tag)))
| DValRec vis => (cmap,
foldl (fn ((_, n, t, _, tag), emap) => IM.insert (emap, n, (t, tag)))
emap vis)
| DExport (_, n, _) =>
(case IM.find (emap, n) of
NONE => raise Fail "MarshalCheck: Unknown export"
| SOME (t, tag) =>
let
fun makeS (t, _) =
case t of
TFun (dom, ran) =>
(case #1 dom of
CFfi ("Basis", "postBody") => makeS ran
| CApp ((CFfi ("Basis", "option"), _), (CFfi ("Basis", "queryString"), _)) => makeS ran
| _ => PS.union (sins cmap dom, makeS ran))
| _ => PS.empty
val s = makeS t
in
if PS.isEmpty s then
()
else
E.error ("Input to exported function '"
^ tag ^ "' involves one or more types that are disallowed for page handler inputs: "
^ PS.toString s);
(cmap, emap)
end)
| DCookie (_, _, t, tag) =>
let
val s = sins cmap t
in
if PS.isEmpty s then
()
else
E.error ("Cookie '" ^ tag ^ "' includes one or more types that are disallowed for cookies: "
^ PS.toString s);
(cmap, emap)
end
| _ => (cmap, emap)
fun checkSins (cmap, _) t =
let
val s = sins cmap t
in
if PS.isEmpty s then
()
else
E.error ("Not allowed to [de]serialize a value involving one or more disallowed types: " ^ PS.toString s)
end
fun exp (e, s) =
case e of
ECApp ((EFfi ("Basis", "serialize"), _), t) =>
(checkSins s t; s)
| ECApp ((EFfi ("Basis", "deserialize"), _), t) =>
(checkSins s t; s)
| _ => s
fun passthrough (_, s) = s
in
ignore (U.File.fold {kind = passthrough,
con = passthrough,
exp = exp,
decl = decl}
(IM.empty, IM.empty) file)
end
end
|
