diff --git a/ChangeLog.md b/ChangeLog.md new file mode 100644 --- /dev/null +++ b/ChangeLog.md @@ -0,0 +1,8 @@ +# Revision history for yggdrasil + +## 0.1.0.0 -- 2018-09-10 + +* Provide an UC-like, strictly typed execution model. +* Provide randomness distributions. +* Provide a typed model for arbitrary adversaries. +* Implement random oracles, crs, and signatures. diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/src/Yggdrasil/Adversarial.hs b/src/Yggdrasil/Adversarial.hs new file mode 100644 --- /dev/null +++ b/src/Yggdrasil/Adversarial.hs @@ -0,0 +1,114 @@ +{-# LANGUAGE AllowAmbiguousTypes #-} +{-# LANGUAGE DataKinds #-} +{-# LANGUAGE ExplicitNamespaces #-} +{-# LANGUAGE FlexibleContexts #-} +{-# LANGUAGE FlexibleInstances #-} +{-# LANGUAGE KindSignatures #-} +{-# LANGUAGE MultiParamTypeClasses #-} +{-# LANGUAGE ScopedTypeVariables #-} +{-# LANGUAGE TypeApplications #-} +{-# LANGUAGE TypeFamilies #-} +{-# LANGUAGE TypeFamilyDependencies #-} +{-# LANGUAGE TypeOperators #-} + +-- | Exposes type for reasoning about adversaries. Generally speaking, a +-- 'Functionality' may request interfaces from an 'Adversary', which need to be +-- supplied for it to run. The adversary also exposes some power to the +-- environment to arbitrarily control these interfaces. Functionalities should +-- be aware that the adversary may respond with anything correctly typed, and +-- is explicitly permitted to returning 'Nothing'. 'WithAdversary'' provides +-- an interface to repair unacceptable responses before the functionality +-- itself is called. +module Yggdrasil.Adversarial + ( Adversary + , MaybeMap + , WithAdversary + , WithAdversary'(..) + , NoAdversary(..) + , DummyInterfaces + , DummyAdversary(..) + , CreateAdversarial(..) + ) where + +import Control.Arrow (second) +import Control.Monad.Trans.Class (lift) +import Yggdrasil.ExecutionModel (Action (Create), + Functionality (Functionality), + InterfaceMap, Interfaces, Operation, + Operations, Ref) +import Yggdrasil.HList (type (+|+), HList ((:::), Nil), + HSplit (hsplit)) + +-- | Maps a list of @'(in, out)@ type tuples to @'(in, 'Maybe' out)@. +type family MaybeMap (bs :: [(*, *)]) = (ys :: [(*, *)]) | ys -> bs where + MaybeMap '[] = '[] + MaybeMap ('( a, b) ': xs) = '( a, Maybe b) ': MaybeMap xs + +-- | Allows construction of @b@ given a list of interfaces @ts@ from the +-- adversary. The adversarial interfaces return 'Maybe's on all interfaces. +newtype WithAdversary s (ts :: [(*, *)]) b = + WithAdversary (HList (Interfaces s (MaybeMap ts)) -> b) + +-- | Allows construction of a 'Functionality' with state @c@ and interface @bs@ +-- whjen given a list of interfaces @as@ from the adversary. The adversarial +-- interface is corrected, by passing it through a filter ensuring valid +-- responses. +data WithAdversary' s c (as :: [(*, *)]) (bs :: [(*, *)]) = + WithAdversary' (HList (Interfaces s (MaybeMap as)) -> HList (Operations s c as)) + (HList (Operations s c as) -> Functionality s c bs) + +-- | An adversary is a functionality that exposes some interfaces to the +-- environment, and some interfaces returning 'Maybe's to some other party. +type Adversary s c as bs = Functionality s c (as +|+ MaybeMap bs) + +-- | The empty adversary returns 'Nothing'. +class NoAdversary s (bs :: [(*, *)]) where + nullOperations :: HList (Operations s () (MaybeMap bs)) + noAdversary :: Adversary s () '[] bs + noAdversary = Functionality () (nullOperations @s @bs) + +instance NoAdversary s '[] where + nullOperations = Nil + +instance NoAdversary s xs => NoAdversary s ('( a, b) ': xs) where + nullOperations = (\_ _ -> return Nothing) ::: nullOperations @s @xs + +-- | Closely corresponding to 'Interfaces', but also receiving a reference to +-- the original sender. +type family DummyInterfaces s (xs :: [(*, *)]) = (ys :: [*]) | ys -> xs where + DummyInterfaces s '[] = '[] + DummyInterfaces s ('( a, b) ': xs) = (Ref s -> a -> Action s b) ': DummyInterfaces s xs + +-- | A dummy adversary executes the interfaces the environments hands it. +class DummyAdversary s (bs :: [(*, *)]) where + operations :: + HList (DummyInterfaces s (MaybeMap bs)) + -> HList (Operations s () (MaybeMap bs)) + dummyAdversary :: + HList (DummyInterfaces s (MaybeMap bs)) -> Adversary s () '[] bs + dummyAdversary = Functionality () . operations @s @bs + +instance DummyAdversary s '[] where + operations _ = Nil + +instance DummyAdversary s bs => DummyAdversary s ('( a, b) ': bs) where + operations (b ::: bs) = + ((\ref x -> lift $ b ref x) :: Operation s () a (Maybe b)) ::: + operations @s @bs bs + +-- | Creates an adversarial functionality given a suitable adversary. +class CreateAdversarial s c as bs adv b where + createAdversarial :: + ( HSplit (Interfaces s (as +|+ MaybeMap bs)) (Interfaces s as) (Interfaces s (MaybeMap bs)) + , InterfaceMap s c (as +|+ MaybeMap bs) + ) + => Adversary s c as bs + -> adv + -> Action s (HList (Interfaces s as), b) + +instance CreateAdversarial s c as bs (WithAdversary s bs b) b where + createAdversarial adv (WithAdversary f) = second f . hsplit <$> Create adv + +instance CreateAdversarial s c as bs (WithAdversary' s c bs cs) (Functionality s c cs) where + createAdversarial adv (WithAdversary' g f) = + (\(a, b) -> (a, f (g b))) . hsplit <$> Create adv diff --git a/src/Yggdrasil/Distribution.hs b/src/Yggdrasil/Distribution.hs new file mode 100644 --- /dev/null +++ b/src/Yggdrasil/Distribution.hs @@ -0,0 +1,98 @@ +{-# LANGUAGE Rank2Types #-} +{-# LANGUAGE ScopedTypeVariables #-} +{-# LANGUAGE TupleSections #-} + +-- | Provides primitives for high-level cryptographic sampling. +module Yggdrasil.Distribution + ( Distribution + , DistributionT(DistributionT, runDistT) + , Sampler(..) + , liftDistribution + , coin + , uniform + ) where + +import Control.Monad (ap, (>=>)) +import Control.Monad.Trans.Class (MonadTrans (lift)) +import Crypto.Random (SystemDRG, randomBytesGenerate) +import Data.Bits ((.&.)) +import qualified Data.ByteArray as B +import Data.Functor.Identity (Identity (Identity), runIdentity) +import Data.Maybe (fromJust) + +-- | Allows randomly sampling elements of type @b@. +type Distribution = DistributionT Identity + +-- | Allows randomly sampling elements of type @b@ in the context of monad @m@. +newtype DistributionT m b = DistributionT + { runDistT :: forall s. Sampler s => + s -> m (b, s) + } + +instance Monad m => Functor (DistributionT m) where + fmap f x = pure f <*> x + +instance Monad m => Applicative (DistributionT m) where + pure x = DistributionT $ pure . (x, ) + (<*>) = ap + +instance Monad m => Monad (DistributionT m) where + a >>= b = DistributionT $ runDistT a >=> (\(a', s') -> runDistT (b a') s') + +instance MonadTrans DistributionT where + lift m = DistributionT $ \s -> (, s) <$> m + +-- | Provides randomness. +class Sampler s + where + -- | Produce a bit of randomness. + sampleCoin :: s -> (Bool, s) + -- | Samples a distribution. + sample :: s -> DistributionT m b -> m (b, s) + sample s d = runDistT d s + -- | Samples a distribution, discarding the result randomness. + sample' :: Monad m => s -> DistributionT m b -> m b + sample' s d = fst <$> sample s d + +instance Sampler SystemDRG where + sampleCoin s = (b .&. 1 == 1, s') + where + (ba :: B.Bytes, s') = randomBytesGenerate 1 s + -- fromJust is safe, as the array is not empty. + (b, _) = fromJust $ B.uncons ba + +-- | Lifts a 'Distribution' to an arbitrary monadic 'DistributionT'. +liftDistribution :: Monad m => Distribution b -> DistributionT m b +liftDistribution d = DistributionT $ return . runIdentity . runDistT d + +-- | Tosses a fair coin. +coin :: Distribution Bool +coin = DistributionT (Identity . sampleCoin) + +-- | A uniform 'Distribution' over all elements of @[a]@. +uniform :: [a] -> Distribution a +uniform xs = do + let l = length xs + let lg = ilog2 l + n <- samplen lg + if n > l + then uniform xs + else return (xs !! n) + where + ilog2 :: Int -> Int + ilog2 1 = 0 + ilog2 n + | n > 1 = ilog2 (n `div` 2) + 1 + ilog2 _ = error "attempted non-postive logarithm" + samplen :: Int -> Distribution Int + samplen 0 = return 0 + samplen lg + | lg > 0 = do + n' <- samplen (lg - 1) + c <- coin + return $ + (n' * 2) + + if c + then 1 + else 0 + samplen _ = error "attempted to sample negative logarithm" diff --git a/src/Yggdrasil/ExecutionModel.hs b/src/Yggdrasil/ExecutionModel.hs new file mode 100644 --- /dev/null +++ b/src/Yggdrasil/ExecutionModel.hs @@ -0,0 +1,158 @@ +{-# LANGUAGE DataKinds #-} +{-# LANGUAGE ExistentialQuantification #-} +{-# LANGUAGE FlexibleInstances #-} +{-# LANGUAGE GADTs #-} +{-# LANGUAGE KindSignatures #-} +{-# LANGUAGE MultiParamTypeClasses #-} +{-# LANGUAGE Rank2Types #-} +{-# LANGUAGE ScopedTypeVariables #-} +{-# LANGUAGE TypeFamilies #-} +{-# LANGUAGE TypeFamilyDependencies #-} +{-# LANGUAGE TypeOperators #-} + +-- | Defines the basic model of execution for Yggdrasil. This is modelled +-- after, but not directly equal to, the +-- . +-- +-- Usage typically involves constructing a complex 'Action', and then 'run'ning +-- it. +module Yggdrasil.ExecutionModel + ( Operation + , RealRef + , Ref(External) + , Action(Abort, Sample, Create, SecParam) + , Operations + , Interfaces + , Functionality(..) + , InterfaceMap(..) + , ForceSample(forceSample) + , run + ) where + +import Control.Monad (ap) +import Control.Monad.Fail (MonadFail (fail)) +import Control.Monad.ST (ST, runST) +import Control.Monad.State.Lazy (StateT, runStateT) +import Control.Monad.Trans.Class (lift) +import Control.Monad.Trans.Maybe (MaybeT (MaybeT), runMaybeT) +import Data.STRef (STRef, newSTRef, readSTRef, + writeSTRef) +import Yggdrasil.Distribution (Distribution, DistributionT (DistributionT, runDistT), + coin, liftDistribution) +import Yggdrasil.HList (HList ((:::), Nil)) + +-- | Describes what a node with internal state of type @c@ does when passed an +-- input of type @a@ by @Ref s@. +type Operation s c a b = Ref s -> a -> StateT c (Action s) b + +-- | Given a list of tuples of input and output types, construct a +-- corresponding list of 'Operation' types. +type family Operations s c (xs :: [(*, *)]) = (ys :: [*]) | ys -> xs where + Operations s c '[] = '[] + Operations s c ('( a, b) ': xs) = Operation s c a b ': Operations s c xs + +-- | Given a list of tuples of input and output types, construct a +-- corresponding list of 'Interface' types. +type family Interfaces s (xs :: [(*, *)]) = (ys :: [*]) | ys -> xs where + Interfaces s '[] = '[] + Interfaces s ('( a, b) ': xs) = (a -> Action s b) ': Interfaces s xs + +-- | A functionality is a stateful node, with an initial state, and an +-- interface typed by a list of input/output type tuples, and defined through a +-- 'HList' of 'Operation's. +data Functionality s c ops = + Functionality c + (HList (Operations s c ops)) + +type ID s = STRef s () + +data SendRef s a b = + forall c. SendRef (RealRef s c) + (Operation s c a b) + +-- | A reference to an actual node in the system. +data RealRef s a = + RealRef (STRef s a) + (ID s) + +-- | A reference to a node, either 'RealRef', or external to the system. +data Ref s + = forall a. Ref (RealRef s a) + | External + +instance Eq (Ref s) where + External == External = True + Ref (RealRef _ a) == Ref (RealRef _ b) = a == b + _ == _ = False + +weaken :: SendRef s a b -> Ref s +weaken (SendRef ref _) = Ref ref + +-- | Yggdrasil's version of 'IO'. Is self-contained, and can be opened with +-- 'run'. +data Action s b where + -- | Fail. This should be used over actual errors! + Abort :: Action s b + -- | Retrieves the security parameter of the running system. + SecParam :: Action s Int + -- | Samples from a distribution. + Sample :: Distribution b -> Action s b + Send :: SendRef s a b -> a -> Action s b + -- | Creates a new node from a functionality specification. + Create + :: InterfaceMap s c ops + => Functionality s c (ops :: [(*, *)]) + -> Action s (HList (Interfaces s ops)) + Compose :: Action s c -> (c -> Action s b) -> Action s b + +instance Functor (Action s) where + fmap f x = pure f <*> x + +instance Applicative (Action s) where + pure = Sample . pure + (<*>) = ap + +instance Monad (Action s) where + a >>= b = Compose a b + +instance MonadFail (Action s) where + fail _ = Abort + +-- | Simulates a world running an external action. +run :: (forall s. Action s b) -> DistributionT Maybe b +run a = + DistributionT $ \rng -> runST $ runMaybeT $ runDistT (run' External a) rng + +run' :: Ref s -> Action s b -> DistributionT (MaybeT (ST s)) b +run' _ Abort = DistributionT $ \_ -> MaybeT $ return Nothing +-- TODO: Make a parameter +run' _ SecParam = return 128 +run' _ (Sample d) = liftDistribution d +run' from (Send to@(SendRef (RealRef (ptr :: STRef s c) _) op) msg) = do + c <- lift . lift $ readSTRef ptr + (b, c') <- run' (weaken to) (runStateT (op from msg) c) + lift . lift $ writeSTRef ptr c' + return b +run' _ (Create (Functionality c ops)) = do + ptr <- lift . lift $ newSTRef c + id' <- lift . lift $ newSTRef () + return $ ifmap (RealRef ptr id') ops +run' from (Compose a f) = run' from a >>= run' from . f + +-- | States we can create interfaces from operations. Implemented for all @ts@. +class InterfaceMap s c (ts :: [(*, *)]) where + ifmap :: RealRef s c -> HList (Operations s c ts) -> HList (Interfaces s ts) + +instance InterfaceMap s c '[] where + ifmap _ Nil = Nil + +instance InterfaceMap s c as => InterfaceMap s c ('( a, b) ': as) where + ifmap ref (x ::: xs) = Send (SendRef ref x) ::: ifmap ref xs + +-- | States that we can forcibly sample from a type, such that with negligible +-- probabily there is a collision between samples. +class ForceSample t where + forceSample :: Action s t + +instance ForceSample [Bool] where + forceSample = SecParam >>= (\sp -> sequence [Sample coin | _ <- [0 .. sp]]) diff --git a/src/Yggdrasil/Functionalities.hs b/src/Yggdrasil/Functionalities.hs new file mode 100644 --- /dev/null +++ b/src/Yggdrasil/Functionalities.hs @@ -0,0 +1,110 @@ +{-# LANGUAGE DataKinds #-} +{-# LANGUAGE GADTs #-} +{-# LANGUAGE LambdaCase #-} +{-# LANGUAGE ScopedTypeVariables #-} +{-# LANGUAGE TypeOperators #-} + +-- | A collection of common functionalities, ready for use. +module Yggdrasil.Functionalities + ( ROState + , SigState + , commonRandomString + , randomOracle + , signature + ) where + +import Control.Monad.State.Lazy (get, modify, put) +import Control.Monad.Trans.Class (lift) + +import Yggdrasil.Adversarial (WithAdversary' (WithAdversary')) +import Yggdrasil.Distribution (Distribution) +import Yggdrasil.ExecutionModel (Action (Sample), + ForceSample (forceSample), + Functionality (Functionality), + Interfaces, Operation, Operations, + Ref) +import Yggdrasil.HList (HList ((:::), Nil)) + +crsOp :: Distribution b -> Operation s (Maybe b) () b +crsOp d _ () = + get >>= \case + Just x -> return x + Nothing -> do + x <- lift $ Sample d + put $ Just x + return x + +-- | A CRS functionality over a given distribution. +commonRandomString :: Distribution b -> Functionality s (Maybe b) '[ '( (), b)] +commonRandomString d = Functionality Nothing (crsOp d ::: Nil) + +-- | The state of a 'randomOracle'. Consists of previously recorded +-- query/response pairs. +type ROState a b = [(a, b)] + +roLookup :: Eq a => a -> ROState a b -> Maybe b +roLookup _ [] = Nothing +roLookup x' ((x, y):_) + | x == x' = Just y +roLookup x (_:xs) = roLookup x xs + +roOp :: Eq a => Distribution b -> Operation s (ROState a b) a b +roOp d _ x = + (roLookup x <$> get) >>= \case + Just y -> return y + Nothing -> do + y <- lift $ Sample d + modify ((x, y) :) + return y + +-- | A random oracle functionality, over a given distribution. +randomOracle :: + Eq a => Distribution b -> Functionality s (ROState a b) '[ '( a, b)] +randomOracle d = Functionality [] (roOp d ::: Nil) + +-- | The state of a 'signature' functionality. Consists of previously recorded +-- signatures, and their corresponding messages and signers. +type SigState s msg sig = [(msg, sig, Ref s)] + +verifyOp :: + (Eq msg, Eq sig) => Operation s (SigState s msg sig) (msg, sig, Ref s) Bool +verifyOp _ s = (s `elem`) <$> get + +fixAdv :: + (Eq msg, Eq sig, ForceSample sig) + => HList (Interfaces s '[ '( (msg, Ref s), Maybe sig)]) + -> HList (Operations s (SigState s msg sig) '[ '( (msg, Ref s), sig)]) +fixAdv (sign ::: Nil) = sign' ::: Nil + where + sign' _ (msg, ref) = do + sig <- + lift (sign (msg, ref)) >>= \case + Just s -> do + st <- get + if (msg, s, ref) `elem` st + then forceSample' msg ref + else return s + Nothing -> forceSample' msg ref + modify ((msg, sig, ref) :) + return sig + forceSample' msg ref = do + sig <- lift forceSample + st <- get + -- This may recursive infinitely iff the signature space is too small! + -- This is a feature, not a bug. + if (msg, sig, ref) `elem` st + then forceSample' msg ref + else return sig + +-- | A robust signature functionality. +signature :: + (Eq msg, Eq sig, ForceSample sig) + => WithAdversary' s (SigState s msg sig) + '[ '( (msg, Ref s), sig)] + '[ '( (msg, Ref s), sig) + , '( (msg, sig, Ref s), Bool) + ] +signature = + WithAdversary' + fixAdv + (\(sign ::: Nil) -> Functionality [] (sign ::: verifyOp ::: Nil)) diff --git a/src/Yggdrasil/HList.hs b/src/Yggdrasil/HList.hs new file mode 100644 --- /dev/null +++ b/src/Yggdrasil/HList.hs @@ -0,0 +1,51 @@ +{-# LANGUAGE DataKinds #-} +{-# LANGUAGE ExplicitNamespaces #-} +{-# LANGUAGE FlexibleInstances #-} +{-# LANGUAGE GADTs #-} +{-# LANGUAGE KindSignatures #-} +{-# LANGUAGE MultiParamTypeClasses #-} +{-# LANGUAGE PolyKinds #-} +{-# LANGUAGE ScopedTypeVariables #-} +{-# LANGUAGE TypeApplications #-} +{-# LANGUAGE TypeFamilies #-} +{-# LANGUAGE TypeOperators #-} + +-- | Provides heterogeneous lists through 'HList', as well as some type and +-- value level operations on them. +module Yggdrasil.HList + ( HList(..) + , type (+|+) + , HAppend((+++)) + , HSplit(hsplit) + ) where + +infixr 5 ::: +-- | A heterogeneous list. +data HList :: [*] -> * where + Nil :: HList '[] + (:::) :: a -> HList as -> HList (a ': as) + +-- | Type-level appending of lists. +type family (as :: [k]) +|+ (bs :: [k]) :: [k] where + '[] +|+ bs = bs + (a ': as) +|+ bs = a ': (as +|+ bs) + +-- | Value-level appending of 'HList's. +class HAppend as bs where + (+++) :: HList as -> HList bs -> HList (as +|+ bs) + +instance HAppend '[] bs where + _ +++ bs = bs + +instance HAppend as bs => HAppend (a ': as) bs where + (a ::: as) +++ bs = a ::: (as +++ bs) + +-- | Split a 'HList' at the value level given the type-level components. +class HSplit hs as bs where + hsplit :: HList hs -> (HList as, HList bs) + +instance HSplit bs '[] bs where + hsplit bs = (Nil, bs) + +instance HSplit hs as bs => HSplit (a ': hs) (a ': as) bs where + hsplit (h ::: hs) = let (as, bs) = hsplit @hs @as @bs hs in (h ::: as, bs) diff --git a/tests/ExecTests.hs b/tests/ExecTests.hs new file mode 100644 --- /dev/null +++ b/tests/ExecTests.hs @@ -0,0 +1,35 @@ +{-# LANGUAGE ScopedTypeVariables #-} + +module ExecTests + ( spec + ) where + +import Crypto.Random (getSystemDRG) +import Data.Maybe (fromJust) +import Test.Hspec (Spec, describe, it, shouldBe) +import Test.Hspec.QuickCheck (prop) +import Yggdrasil.Distribution (sample', uniform) +import Yggdrasil.ExecutionModel (Action (Sample), run) + +inSampleRange :: Int -> Bool +inSampleRange x = x > 4700 && x < 5300 + +sampleTest :: Action s Int +sampleTest = sampleTest' 10000 + where + sampleTest' :: Int -> Action s Int + sampleTest' 0 = return 0 + sampleTest' n = do + x <- sampleTest' (n - 1) + b <- Sample (uniform [0, 1]) + return $ x + b + +spec :: IO Spec +spec = do + rnd <- getSystemDRG + return $ + describe "action" $ do + prop "obeys return" $ \(x :: String) -> + sample' rnd (run (return x)) == Just x + it "samples evenly" $ + inSampleRange (fromJust $ sample' rnd (run sampleTest)) `shouldBe` True diff --git a/tests/FunctTests.hs b/tests/FunctTests.hs new file mode 100644 --- /dev/null +++ b/tests/FunctTests.hs @@ -0,0 +1,49 @@ +{-# LANGUAGE GADTs #-} +{-# LANGUAGE ScopedTypeVariables #-} + +module FunctTests + ( spec + ) where + +import Crypto.Random (getSystemDRG) +import Test.Hspec (Spec, describe, it, shouldBe) +import Yggdrasil.Distribution (sample', uniform) +import Yggdrasil.ExecutionModel (Action (Create), run) +import Yggdrasil.Functionalities (commonRandomString, randomOracle) +import Yggdrasil.HList (HList ((:::), Nil)) + +crsSameTest :: Action s Bool +crsSameTest = do + (crsHandle ::: Nil) <- + Create $ commonRandomString (uniform [0 .. 10000 :: Int]) + fst' <- crsHandle () + snd' <- crsHandle () + return (fst' == snd') + +roSameTest :: Action s Bool +roSameTest = do + ((roHandle :: Int -> Action s Int) ::: Nil) <- + Create $ randomOracle (uniform [0 .. 1000 :: Int]) + fst' <- roHandle 1 + snd' <- roHandle 1 + return (fst' == snd') + +roAllEqual :: Action s Bool +roAllEqual = do + ((roHandle :: Int -> Action s Int) ::: Nil) <- + Create $ randomOracle (uniform [0 .. 1000 :: Int]) + xs <- sequence [roHandle i | i <- [1 .. 1000]] + return $ all (== head xs) (tail xs) + +spec :: IO Spec +spec = do + rnd <- getSystemDRG + return $ do + describe "common random string" $ + it "returns the same value" $ + sample' rnd (run crsSameTest) `shouldBe` Just True + describe "random oracle" $ do + it "returns the same for the same query" $ + sample' rnd (run roSameTest) `shouldBe` Just True + it "is random with different queries" $ + sample' rnd (run roAllEqual) `shouldBe` Just False diff --git a/tests/Spec.hs b/tests/Spec.hs new file mode 100644 --- /dev/null +++ b/tests/Spec.hs @@ -0,0 +1,11 @@ +import Test.Hspec (hspec) + +import qualified ExecTests +import qualified FunctTests + +main :: IO () +main = do + execTests <- ExecTests.spec + functTests <- FunctTests.spec + hspec execTests + hspec functTests diff --git a/yggdrasil.cabal b/yggdrasil.cabal new file mode 100644 --- /dev/null +++ b/yggdrasil.cabal @@ -0,0 +1,51 @@ +name: yggdrasil +version: 0.1.0.0 +synopsis: Executable specifications of composable cryptographic protocols. +description: Yggdrasil is a framework for writing executable + specification of composable cryptographic protocols. It is + modelled after Ran Canetti's Universal Composability + framework, although it departs from it in multiple places + to simplify the interface, and provide strong typing. +homepage: https://git.drwx.org/phd/yggdrasil +license: AGPL-3 +license-file: LICENSE +author: Thomas Kerber +maintainer: tk@drwx.org +category: Cryptography +build-type: Simple +extra-source-files: ChangeLog.md +cabal-version: >=1.10 + +source-repository head + type: git + location: https://git.drwx.org/phd/yggdrasil + +library + exposed-modules: Yggdrasil.Adversarial + Yggdrasil.Distribution + Yggdrasil.ExecutionModel + Yggdrasil.Functionalities + Yggdrasil.HList + build-depends: base >= 4.11 && < 4.12 + , cryptonite >= 0.25 && < 0.26 + , memory >= 0.14 && < 0.15 + , mtl >= 2.2 && < 2.3 + , transformers >= 0.5 && < 0.6 + hs-source-dirs: src + default-language: Haskell2010 + ghc-options: -Wall -Wcompat -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints + +test-suite spec + type: exitcode-stdio-1.0 + other-extensions: ScopedTypeVariables + default-language: Haskell2010 + hs-source-dirs: tests + ghc-options: -Wall -Wcompat -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints + main-is: Spec.hs + other-modules: ExecTests + FunctTests + build-depends: cryptonite + , base + , hspec + , QuickCheck + , yggdrasil