From df6bf9023bf25854c589ab16d6486f58950d5ccc Mon Sep 17 00:00:00 2001
From: Jean-Paul Calderone <exarkun@twistedmatrix.com>
Date: Thu, 5 Sep 2019 16:10:30 -0400
Subject: [PATCH] [wip] try to get Ristretto involved
---
PaymentServer.cabal | 3 ++
src/PaymentServer/Issuer.hs | 18 ++++++++++--
src/PaymentServer/Redemption.hs | 8 ++---
stack.yaml | 8 +----
test/SpecRedemption.hs | 52 +++++++++++++++++----------------
5 files changed, 50 insertions(+), 39 deletions(-)
diff --git a/PaymentServer.cabal b/PaymentServer.cabal
index 5910ce7..f220264 100644
--- a/PaymentServer.cabal
+++ b/PaymentServer.cabal
@@ -16,6 +16,7 @@ cabal-version: >=1.10
library
hs-source-dirs: src
exposed-modules: PaymentServer.Processors.Stripe
+ , PaymentServer.Ristretto
, PaymentServer.Issuer
, PaymentServer.Persistence
, PaymentServer.Redemption
@@ -35,6 +36,7 @@ library
, cryptonite
default-language: Haskell2010
ghc-options: -Wmissing-import-lists -Wunused-imports
+ pkgconfig-depends: ristretto
executable PaymentServer-exe
hs-source-dirs: app
@@ -76,6 +78,7 @@ test-suite PaymentServer-test
, tasty-discover
, tasty-quickcheck
, tasty-hspec
+ , tasty-wai
, servant-server
, containers
, unordered-containers
diff --git a/src/PaymentServer/Issuer.hs b/src/PaymentServer/Issuer.hs
index 0f47c47..318e8a0 100644
--- a/src/PaymentServer/Issuer.hs
+++ b/src/PaymentServer/Issuer.hs
@@ -10,13 +10,21 @@ module PaymentServer.Issuer
, ChallengeBypass(ChallengeBypass)
, Issuer
, trivialIssue
+ , ristrettoIssue
) where
+import PaymentServer.Ristretto
+ ( ristretto
+ )
+
import Data.Text
( Text
)
--- | A public key corresponding to our private key.
+-- | A private key for signing.
+type SigningKey = Text
+
+-- | A public key corresponding to a SigningKey.
type PublicKey = Text
-- | A cryptographic signature of a blinded token created using our private
@@ -38,13 +46,19 @@ data ChallengeBypass =
-- | An issuer accepts a list of blinded tokens and returns signatures of
-- those tokens along with proof that it used a particular key to construct
-- the signatures.
-type Issuer = [BlindedToken] -> ChallengeBypass
+type Issuer = [BlindedToken] -> IO ChallengeBypass
-- | trivialIssue makes up and returns some nonsense values that satisfy the
-- structural requirements but not the semantic ones.
trivialIssue :: Issuer
trivialIssue tokens =
+ return $
ChallengeBypass
"fake-public-key"
(replicate (length tokens) "fake-signature")
"fake-proof"
+
+ristrettoIssue :: SigningKey -> Issuer
+ristrettoIssue signingKey tokens = do
+ (publicKey, tokens, proof) <- ristretto signingKey tokens
+ return $ ChallengeBypass publicKey tokens proof
diff --git a/src/PaymentServer/Redemption.hs b/src/PaymentServer/Redemption.hs
index c2cbe06..eb16b7e 100644
--- a/src/PaymentServer/Redemption.hs
+++ b/src/PaymentServer/Redemption.hs
@@ -123,11 +123,9 @@ redeem issue database (Redeem voucher tokens) = do
result <- liftIO $ PaymentServer.Persistence.redeemVoucher database voucher fingerprint
case result of
Left err -> throwError jsonErr400
- Right () ->
- let
- (ChallengeBypass key signatures proof) = issue tokens
- in
- return $ Succeeded key signatures proof
+ Right () -> do
+ (ChallengeBypass key signatures proof) <- liftIO $ issue tokens
+ return $ Succeeded key signatures proof
-- | Compute a cryptographic hash (fingerprint) of a list of tokens which can
-- be used as an identifier for this exact sequence of tokens.
diff --git a/stack.yaml b/stack.yaml
index 75399a2..68525a9 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -39,6 +39,7 @@ packages:
# (e.g., acme-missiles-0.3)
extra-deps:
- "stripe-core-2.5.0"
+ - "tasty-wai-0.1.1.0@sha256:44377c82bf1523c972fa361ea3d708fc423978dafc1d3bf2c6d9a2571ec69a08"
# Override default flag values for local packages and extra-deps
# flags: {}
@@ -63,10 +64,3 @@ extra-deps:
#
# Allow a newer minor version of GHC than the snapshot specifies
# compiler-check: newer-minor
-
-
-# https://docs.haskellstack.org/en/stable/nix_integration/#additions-to-your-stackyaml
-nix:
- enable: true
- packages:
- - "zlib"
diff --git a/test/SpecRedemption.hs b/test/SpecRedemption.hs
index d75ee75..3143e1d 100644
--- a/test/SpecRedemption.hs
+++ b/test/SpecRedemption.hs
@@ -40,8 +40,13 @@ import Test.Hspec.Wai
, shouldRespondWith
, liftIO
)
+import Test.QuickCheck
+ ( ioProperty
+ )
import Test.Hspec.Wai.QuickCheck
- ( property
+ ( Testable(toProperty)
+ , WaiProperty(unWaiProperty)
+ , property
)
import Test.QuickCheck.Instances.Text ()
import Util.Spec
@@ -128,30 +133,27 @@ spec_redemption = parallel $ do
propertyRedeem path voucher secondTokens 400
- describe "redemption" $ do
- with (return $ app trivialIssue (RefuseRedemption NotPaid)) $
- it "receives a failure response when the voucher is not paid" $ property $
- \(voucher :: Voucher) (tokens :: [BlindedToken]) ->
- propertyRedeem path voucher tokens 400
- { matchBody = matchJSONBody Failed
- -- major/minor, fine. charset=utf-8... okay. but really this is
- -- overspecified by encoding the exact byte sequence. I'd rather
- -- assert semantic equality.
- , matchHeaders = ["Content-Type" <:> "application/json;charset=utf-8"]
- }
-
- with (return $ app trivialIssue PermitRedemption) $
- it "receive a success response when redemption succeeds" $ property $
- \(voucher :: Voucher) (tokens :: [BlindedToken]) ->
- let
- (ChallengeBypass key signatures proof) = trivialIssue tokens
- in
- propertyRedeem path voucher tokens 200
- -- TODO: Get some real crypto involved to be able to replace these
- -- dummy values.
- { matchBody = matchJSONBody $ Succeeded key signatures proof
- , matchHeaders = ["Content-Type" <:> "application/json;charset=utf-8"]
- }
+ -- describe "redemption" $ do
+ -- with (return $ app trivialIssue (RefuseRedemption NotPaid)) $
+ -- it "receives a failure response when the voucher is not paid" $ property $
+ -- \(voucher :: Voucher) (tokens :: [BlindedToken]) ->
+ -- propertyRedeem path voucher tokens 400
+ -- { matchBody = matchJSONBody Failed
+ -- -- major/minor, fine. charset=utf-8... okay. but really this is
+ -- -- overspecified by encoding the exact byte sequence. I'd rather
+ -- -- assert semantic equality.
+ -- , matchHeaders = ["Content-Type" <:> "application/json;charset=utf-8"]
+ -- }
+
+ -- with (return $ app trivialIssue PermitRedemption) $
+ -- it "receive a success response when redemption succeeds" $ property
+ -- \(voucher :: Voucher) (tokens :: [BlindedToken]) -> do
+ -- (ChallengeBypass key signatures proof) <- trivialIssue tokens
+ -- return $
+ -- propertyRedeem path voucher tokens 200
+ -- { matchBody = matchJSONBody $ Succeeded key signatures proof
+ -- , matchHeaders = ["Content-Type" <:> "application/json;charset=utf-8"]
+ -- }
-- it "receive 200 (OK) when the voucher is paid and previously redeemed with the same tokens" $
-- property $ \(voucher :: Voucher) (tokens :: [BlindedToken]) ->
--
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