mirror of
https://github.com/simplex-chat/simplexmq.git
synced 2026-09-09 13:56:09 +00:00
437 lines
20 KiB
Haskell
437 lines
20 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DuplicateRecordFields #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE KindSignatures #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TupleSections #-}
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-- |
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-- Module : Simplex.Messaging.Server
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-- Copyright : (c) simplex.chat
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-- License : AGPL-3
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--
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-- Maintainer : chat@simplex.chat
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-- Stability : experimental
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-- Portability : non-portable
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--
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-- This module defines SMP protocol server with in-memory persistence
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-- and optional append only log of SMP queue records.
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--
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-- See https://github.com/simplex-chat/simplexmq/blob/master/protocol/simplex-messaging.md
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module Simplex.Messaging.Server (runSMPServer, runSMPServerBlocking) where
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import Control.Monad
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import Control.Monad.Except
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import Control.Monad.IO.Unlift
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import Control.Monad.Reader
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import Crypto.Random
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import Data.ByteString.Char8 (ByteString)
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import qualified Data.ByteString.Char8 as B
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import Data.Functor (($>))
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import qualified Data.Map.Strict as M
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import Data.Maybe (isNothing)
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import Data.Time.Clock
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import Data.Type.Equality
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import Network.Socket (ServiceName)
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import qualified Simplex.Messaging.Crypto as C
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import Simplex.Messaging.Protocol
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import Simplex.Messaging.Server.Env.STM
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import Simplex.Messaging.Server.MsgStore
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import Simplex.Messaging.Server.MsgStore.STM (MsgQueue)
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import Simplex.Messaging.Server.QueueStore
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import Simplex.Messaging.Server.QueueStore.STM (QueueStore)
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import Simplex.Messaging.Server.StoreLog
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import Simplex.Messaging.Transport
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import Simplex.Messaging.Util
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import UnliftIO.Concurrent
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import UnliftIO.Exception
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import UnliftIO.IO
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import UnliftIO.STM
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-- | Runs an SMP server using passed configuration.
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--
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-- See a full server here: https://github.com/simplex-chat/simplexmq/blob/master/apps/smp-server/Main.hs
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runSMPServer :: (MonadRandom m, MonadUnliftIO m) => ServerConfig -> m ()
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runSMPServer cfg = do
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started <- newEmptyTMVarIO
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runSMPServerBlocking started cfg
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-- | Runs an SMP server using passed configuration with signalling.
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--
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-- This function uses passed TMVar to signal when the server is ready to accept TCP requests (True)
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-- and when it is disconnected from the TCP socket once the server thread is killed (False).
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runSMPServerBlocking :: (MonadRandom m, MonadUnliftIO m) => TMVar Bool -> ServerConfig -> m ()
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runSMPServerBlocking started cfg@ServerConfig {transports} = do
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env <- newEnv cfg
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runReaderT smpServer env
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where
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smpServer :: (MonadUnliftIO m', MonadReader Env m') => m' ()
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smpServer = do
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s <- asks server
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raceAny_
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( serverThread s subscribedQ subscribers subscriptions cancelSub :
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serverThread s ntfSubscribedQ notifiers ntfSubscriptions (\_ -> pure ()) :
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map runServer transports
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)
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`finally` withLog closeStoreLog
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runServer :: (MonadUnliftIO m', MonadReader Env m') => (ServiceName, ATransport) -> m' ()
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runServer (tcpPort, ATransport t) = runTransportServer started tcpPort (runClient t)
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serverThread ::
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forall m' s.
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MonadUnliftIO m' =>
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Server ->
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(Server -> TBQueue (QueueId, Client)) ->
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(Server -> TVar (M.Map QueueId Client)) ->
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(Client -> TVar (M.Map QueueId s)) ->
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(s -> m' ()) ->
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m' ()
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serverThread s subQ subs clientSubs unsub = forever $ do
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atomically updateSubscribers >>= mapM_ unsub
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where
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updateSubscribers :: STM (Maybe s)
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updateSubscribers = do
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(qId, clnt) <- readTBQueue $ subQ s
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serverSubs <- readTVar $ subs s
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writeTVar (subs s) $ M.insert qId clnt serverSubs
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join <$> mapM (endPreviousSubscriptions qId) (M.lookup qId serverSubs)
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endPreviousSubscriptions :: QueueId -> Client -> STM (Maybe s)
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endPreviousSubscriptions qId c = do
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writeTBQueue (rcvQ c) (CorrId B.empty, qId, Cmd SBroker END)
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stateTVar (clientSubs c) $ \ss -> (M.lookup qId ss, M.delete qId ss)
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runClient :: (Transport c, MonadUnliftIO m, MonadReader Env m) => TProxy c -> c -> m ()
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runClient _ h = do
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keyPair <- asks serverKeyPair
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ServerConfig {blockSize} <- asks config
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liftIO (runExceptT $ serverHandshake h blockSize keyPair) >>= \case
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Right th -> runClientTransport th
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Left _ -> pure ()
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runClientTransport :: (Transport c, MonadUnliftIO m, MonadReader Env m) => THandle c -> m ()
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runClientTransport th = do
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q <- asks $ tbqSize . config
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c <- atomically $ newClient q
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s <- asks server
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raceAny_ [send th c, client c s, receive th c]
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`finally` cancelSubscribers c
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cancelSubscribers :: MonadUnliftIO m => Client -> m ()
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cancelSubscribers Client {subscriptions} =
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readTVarIO subscriptions >>= mapM_ cancelSub
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cancelSub :: MonadUnliftIO m => Sub -> m ()
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cancelSub = \case
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Sub {subThread = SubThread t} -> killThread t
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_ -> return ()
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receive :: (Transport c, MonadUnliftIO m, MonadReader Env m) => THandle c -> Client -> m ()
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receive h Client {rcvQ} = forever $ do
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(signature, (corrId, queueId, cmdOrError)) <- tGet fromClient h
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t <- case cmdOrError of
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Left e -> return . mkResp corrId queueId $ ERR e
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Right cmd -> verifyTransmission (signature, (corrId, queueId, cmd))
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atomically $ writeTBQueue rcvQ t
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send :: (Transport c, MonadUnliftIO m) => THandle c -> Client -> m ()
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send h Client {sndQ} = forever $ do
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t <- atomically $ readTBQueue sndQ
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liftIO $ tPut h (Nothing, serializeTransmission t)
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mkResp :: CorrId -> QueueId -> Command 'Broker -> Transmission
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mkResp corrId queueId command = (corrId, queueId, Cmd SBroker command)
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verifyTransmission :: forall m. (MonadUnliftIO m, MonadReader Env m) => SignedTransmission -> m Transmission
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verifyTransmission (sig_, t@(corrId, queueId, cmd)) = do
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(corrId,queueId,) <$> case cmd of
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Cmd SBroker _ -> return $ smpErr INTERNAL -- it can only be client command, because `fromClient` was used
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Cmd SRecipient (NEW k) -> pure $ verifySignature k
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Cmd SRecipient _ -> verifyCmd SRecipient $ verifySignature . recipientKey
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Cmd SSender (SEND _) -> verifyCmd SSender $ verifyMaybe . senderKey
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Cmd SSender PING -> return cmd
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Cmd SNotifier NSUB -> verifyCmd SNotifier $ verifyMaybe . fmap snd . notifier
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where
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verifyCmd :: SParty p -> (QueueRec -> Cmd) -> m Cmd
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verifyCmd party f = do
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st <- asks queueStore
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q <- atomically $ getQueue st party queueId
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pure $ either (const $ dummyVerify_ sig_ authErr) f q
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verifyMaybe :: Maybe C.APublicVerifyKey -> Cmd
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verifyMaybe (Just k) = verifySignature k
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verifyMaybe _ = maybe cmd (const authErr) sig_
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verifySignature :: C.APublicVerifyKey -> Cmd
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verifySignature key = case sig_ of
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Just s -> if verify key s then cmd else authErr
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_ -> authErr
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verify :: C.APublicVerifyKey -> C.ASignature -> Bool
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verify (C.APublicVerifyKey a k) sig@(C.ASignature a' s) =
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case (testEquality a a', C.signatureSize k == C.signatureSize s) of
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(Just Refl, True) -> cryptoVerify k s
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_ -> dummyVerify sig False
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cryptoVerify :: C.SignatureAlgorithm a => C.PublicKey a -> C.Signature a -> Bool
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cryptoVerify k s = C.verify' k s (serializeTransmission t)
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dummyVerify_ :: Maybe C.ASignature -> a -> a
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dummyVerify_ = \case
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Just s -> dummyVerify s
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_ -> id
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dummyVerify :: C.ASignature -> a -> a
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dummyVerify (C.ASignature _ s) = seq $ cryptoVerify (dummyPublicKey s) s
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smpErr = Cmd SBroker . ERR
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authErr = smpErr AUTH
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-- These dummy keys are used with `dummyVerify` function to mitigate timing attacks
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-- by having the same time of the response whether a queue exists or nor, for all valid key/signature sizes
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dummyPublicKey :: C.Signature a -> C.PublicKey a
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dummyPublicKey = \case
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C.SignatureRSA s' -> case B.length s' of
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128 -> dummyKey128
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256 -> dummyKey256
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384 -> dummyKey384
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512 -> dummyKey512
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_ -> dummyKey256
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C.SignatureEd25519 _ -> dummyKeyEd25519
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C.SignatureEd448 _ -> dummyKeyEd448
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dummyKeyEd25519 :: C.PublicKey 'C.Ed25519
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dummyKeyEd25519 = "MCowBQYDK2VwAyEA139Oqs4QgpqbAmB0o7rZf6T19ryl7E65k4AYe0kE3Qs="
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dummyKeyEd448 :: C.PublicKey 'C.Ed448
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dummyKeyEd448 = "MEMwBQYDK2VxAzoA6ibQc9XpkSLtwrf7PLvp81qW/etiumckVFImCMRdftcG/XopbOSaq9qyLhrgJWKOLyNrQPNVvpMA"
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dummyKey128 :: C.PublicKey 'C.RSA
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dummyKey128 = "MIIBIDANBgkqhkiG9w0BAQEFAAOCAQ0AMIIBCAKBgQC2oeA7s4roXN5K2N6022I1/2CTeMKjWH0m00bSZWa4N8LDKeFcShh8YUxZea5giAveViTRNOOVLgcuXbKvR3u24szN04xP0+KnYUuUUIIoT3YSjX0IlomhDhhSyup4BmA0gAZ+D1OaIKZFX6J8yQ1Lr/JGLEfSRsBjw8l+4hs9OwKBgQDKA+YlZvGb3BcpDwKmatiCXN7ZRDWkjXbj8VAW5zV95tSRCCVN48hrFM1H4Ju2QMMUc6kPUVX+eW4ZjdCl5blIqIHMcTmsdcmsDDCg3PjUNrwc6bv/1TcirbAKcmnKt9iurIt6eerxSO7TZUXXMUVsi7eRwb/RUNhpCrpJ/hpIOw=="
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dummyKey256 :: C.PublicKey 'C.RSA
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dummyKey256 = "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"
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dummyKey384 :: C.PublicKey 'C.RSA
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dummyKey384 = "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"
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dummyKey512 :: C.PublicKey 'C.RSA
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dummyKey512 = "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"
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client :: forall m. (MonadUnliftIO m, MonadReader Env m) => Client -> Server -> m ()
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client clnt@Client {subscriptions, ntfSubscriptions, rcvQ, sndQ = sndQ'} Server {subscribedQ, ntfSubscribedQ, notifiers} =
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forever $
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atomically (readTBQueue rcvQ)
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>>= processCommand
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>>= atomically . writeTBQueue sndQ'
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where
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processCommand :: Transmission -> m Transmission
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processCommand (corrId, queueId, cmd) = do
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st <- asks queueStore
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case cmd of
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Cmd SBroker _ -> pure (corrId, queueId, cmd)
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Cmd SSender command -> case command of
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SEND msgBody -> sendMessage st msgBody
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PING -> return (corrId, queueId, Cmd SBroker PONG)
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Cmd SNotifier NSUB -> subscribeNotifications
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Cmd SRecipient command -> case command of
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NEW rKey -> createQueue st rKey
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SUB -> subscribeQueue queueId
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ACK -> acknowledgeMsg
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KEY sKey -> secureQueue_ st sKey
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NKEY nKey -> addQueueNotifier_ st nKey
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OFF -> suspendQueue_ st
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DEL -> delQueueAndMsgs st
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where
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createQueue :: QueueStore -> RecipientPublicKey -> m Transmission
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createQueue st rKey = checkKeySize rKey $ addQueueRetry 3
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where
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addQueueRetry :: Int -> m (Command 'Broker)
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addQueueRetry 0 = pure $ ERR INTERNAL
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addQueueRetry n = do
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ids@(rId, sId) <- getIds
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atomically (addQueue st rKey ids) >>= \case
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Left DUPLICATE_ -> addQueueRetry $ n - 1
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Left e -> pure $ ERR e
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Right _ -> do
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withLog (`logCreateById` rId)
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subscribeQueue rId $> IDS rId sId
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logCreateById :: StoreLog 'WriteMode -> RecipientId -> IO ()
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logCreateById s rId =
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atomically (getQueue st SRecipient rId) >>= \case
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Right q -> logCreateQueue s q
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_ -> pure ()
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getIds :: m (RecipientId, SenderId)
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getIds = do
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n <- asks $ queueIdBytes . config
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liftM2 (,) (randomId n) (randomId n)
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secureQueue_ :: QueueStore -> SenderPublicKey -> m Transmission
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secureQueue_ st sKey = do
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withLog $ \s -> logSecureQueue s queueId sKey
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atomically . checkKeySize sKey $ either ERR (const OK) <$> secureQueue st queueId sKey
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addQueueNotifier_ :: QueueStore -> NotifierPublicKey -> m Transmission
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addQueueNotifier_ st nKey = checkKeySize nKey $ addNotifierRetry 3
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where
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addNotifierRetry :: Int -> m (Command 'Broker)
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addNotifierRetry 0 = pure $ ERR INTERNAL
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addNotifierRetry n = do
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nId <- randomId =<< asks (queueIdBytes . config)
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atomically (addQueueNotifier st queueId nId nKey) >>= \case
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Left DUPLICATE_ -> addNotifierRetry $ n - 1
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Left e -> pure $ ERR e
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Right _ -> do
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withLog $ \s -> logAddNotifier s queueId nId nKey
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pure $ NID nId
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checkKeySize :: Monad m' => C.APublicVerifyKey -> m' (Command 'Broker) -> m' Transmission
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checkKeySize key action =
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mkResp corrId queueId
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<$> if C.validKeySize key
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then action
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else pure . ERR $ CMD KEY_SIZE
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suspendQueue_ :: QueueStore -> m Transmission
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suspendQueue_ st = do
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withLog (`logDeleteQueue` queueId)
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okResp <$> atomically (suspendQueue st queueId)
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subscribeQueue :: RecipientId -> m Transmission
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subscribeQueue rId =
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atomically (getSubscription rId) >>= deliverMessage tryPeekMsg rId
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getSubscription :: RecipientId -> STM Sub
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getSubscription rId = do
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subs <- readTVar subscriptions
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case M.lookup rId subs of
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Just s -> tryTakeTMVar (delivered s) $> s
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Nothing -> do
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writeTBQueue subscribedQ (rId, clnt)
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s <- newSubscription
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writeTVar subscriptions $ M.insert rId s subs
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return s
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subscribeNotifications :: m Transmission
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subscribeNotifications = atomically $ do
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subs <- readTVar ntfSubscriptions
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when (isNothing $ M.lookup queueId subs) $ do
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writeTBQueue ntfSubscribedQ (queueId, clnt)
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writeTVar ntfSubscriptions $ M.insert queueId () subs
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pure ok
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acknowledgeMsg :: m Transmission
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acknowledgeMsg =
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atomically (withSub queueId $ \s -> const s <$$> tryTakeTMVar (delivered s))
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>>= \case
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Just (Just s) -> deliverMessage tryDelPeekMsg queueId s
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_ -> return $ err NO_MSG
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withSub :: RecipientId -> (Sub -> STM a) -> STM (Maybe a)
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withSub rId f = readTVar subscriptions >>= mapM f . M.lookup rId
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sendMessage :: QueueStore -> MsgBody -> m Transmission
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sendMessage st msgBody = do
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qr <- atomically $ getQueue st SSender queueId
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either (return . err) storeMessage qr
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where
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mkMessage :: m Message
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mkMessage = do
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msgId <- asks (msgIdBytes . config) >>= randomId
|
|
ts <- liftIO getCurrentTime
|
|
return $ Message {msgId, ts, msgBody}
|
|
|
|
storeMessage :: QueueRec -> m Transmission
|
|
storeMessage qr = case status qr of
|
|
QueueOff -> return $ err AUTH
|
|
QueueActive -> do
|
|
ms <- asks msgStore
|
|
msg <- mkMessage
|
|
quota <- asks $ msgQueueQuota . config
|
|
atomically $ do
|
|
q <- getMsgQueue ms (recipientId qr) quota
|
|
ifM (isFull q) (pure $ err QUOTA) $ do
|
|
trySendNotification
|
|
writeMsg q msg
|
|
pure ok
|
|
where
|
|
trySendNotification :: STM ()
|
|
trySendNotification =
|
|
forM_ (notifier qr) $ \(nId, _) ->
|
|
mapM_ (writeNtf nId) . M.lookup nId =<< readTVar notifiers
|
|
|
|
writeNtf :: NotifierId -> Client -> STM ()
|
|
writeNtf nId Client {sndQ} =
|
|
unlessM (isFullTBQueue sndQ) $
|
|
writeTBQueue sndQ $ mkResp (CorrId B.empty) nId NMSG
|
|
|
|
deliverMessage :: (MsgQueue -> STM (Maybe Message)) -> RecipientId -> Sub -> m Transmission
|
|
deliverMessage tryPeek rId = \case
|
|
Sub {subThread = NoSub} -> do
|
|
ms <- asks msgStore
|
|
quota <- asks $ msgQueueQuota . config
|
|
q <- atomically $ getMsgQueue ms rId quota
|
|
atomically (tryPeek q) >>= \case
|
|
Nothing -> forkSub q $> ok
|
|
Just msg -> atomically setDelivered $> mkResp corrId rId (msgCmd msg)
|
|
_ -> return ok
|
|
where
|
|
forkSub :: MsgQueue -> m ()
|
|
forkSub q = do
|
|
atomically . setSub $ \s -> s {subThread = SubPending}
|
|
t <- forkIO $ subscriber q
|
|
atomically . setSub $ \case
|
|
s@Sub {subThread = SubPending} -> s {subThread = SubThread t}
|
|
s -> s
|
|
|
|
subscriber :: MsgQueue -> m ()
|
|
subscriber q = atomically $ do
|
|
msg <- peekMsg q
|
|
writeTBQueue sndQ' $ mkResp (CorrId B.empty) rId (msgCmd msg)
|
|
setSub (\s -> s {subThread = NoSub})
|
|
void setDelivered
|
|
|
|
setSub :: (Sub -> Sub) -> STM ()
|
|
setSub f = modifyTVar subscriptions $ M.adjust f rId
|
|
|
|
setDelivered :: STM (Maybe Bool)
|
|
setDelivered = withSub rId $ \s -> tryPutTMVar (delivered s) ()
|
|
|
|
delQueueAndMsgs :: QueueStore -> m Transmission
|
|
delQueueAndMsgs st = do
|
|
withLog (`logDeleteQueue` queueId)
|
|
ms <- asks msgStore
|
|
atomically $
|
|
deleteQueue st queueId >>= \case
|
|
Left e -> return $ err e
|
|
Right _ -> delMsgQueue ms queueId $> ok
|
|
|
|
ok :: Transmission
|
|
ok = mkResp corrId queueId OK
|
|
|
|
err :: ErrorType -> Transmission
|
|
err = mkResp corrId queueId . ERR
|
|
|
|
okResp :: Either ErrorType () -> Transmission
|
|
okResp = either err $ const ok
|
|
|
|
msgCmd :: Message -> Command 'Broker
|
|
msgCmd Message {msgId, ts, msgBody} = MSG msgId ts msgBody
|
|
|
|
withLog :: (MonadUnliftIO m, MonadReader Env m) => (StoreLog 'WriteMode -> IO a) -> m ()
|
|
withLog action = do
|
|
env <- ask
|
|
liftIO . mapM_ action $ storeLog (env :: Env)
|
|
|
|
randomId :: (MonadUnliftIO m, MonadReader Env m) => Int -> m Encoded
|
|
randomId n = do
|
|
gVar <- asks idsDrg
|
|
atomically (randomBytes n gVar)
|
|
|
|
randomBytes :: Int -> TVar ChaChaDRG -> STM ByteString
|
|
randomBytes n gVar = do
|
|
g <- readTVar gVar
|
|
let (bytes, g') = randomBytesGenerate n g
|
|
writeTVar gVar g'
|
|
return bytes
|