412 lines
10 KiB
Haskell
412 lines
10 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE Arrows #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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module Model.Auth where
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import Servant
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import Control.Arrow
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import Control.Monad (void)
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import Control.Monad.IO.Class (liftIO)
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import Control.Monad.Reader (asks)
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import Control.Concurrent (threadDelay)
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import Control.Concurrent.STM
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import Data.Profunctor.Product (p4, p5)
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import qualified Database.PostgreSQL.Simple as PGS
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import Data.Int (Int64)
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import qualified Data.Text as T
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import Data.Text.Encoding
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import qualified Data.Set as S
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import Data.Time.Clock
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import Data.ByteString as B (ByteString)
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import Data.ByteString.Random
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import qualified Data.ByteString.Base64 as B64
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import Opaleye hiding (null)
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import qualified Opaleye.Constant as C
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-- internal imports
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import Types.Auth
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import Types.Reader
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initToken :: PGS.Query
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initToken = mconcat
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[ "CREATE TABLE IF NOT EXISTS \"token\" ("
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, "token_string TEXT NOT NULL PRIMARY KEY,"
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, "token_user INTEGER REFERENCES \"user\"(user_id) NOT NULL,"
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, "token_expiry TIMESTAMPTZ NOT NULL,"
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, "token_method INT NOT NULL"
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, ")"
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]
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tokenTable :: Table
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( Field SqlText
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, Field SqlInt4
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, Field SqlTimestamptz
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, Field SqlInt4
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)
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( Field SqlText
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, Field SqlInt4
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, Field SqlTimestamptz
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, Field SqlInt4
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)
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tokenTable = table "token" (
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p4
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( tableField "token_string"
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, tableField "token_user"
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, tableField "token_expiry"
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, tableField "token_method"
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)
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)
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initAuthData :: PGS.Query
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initAuthData = mconcat
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[ "CREATE TABLE IF NOT EXISTS \"auth_data\" ("
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, "auth_data_id SERIAL PRIMARY KEY,"
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, "auth_data_user INTEGER NOT NULL REFERENCES \"user\"(\"user_id\") ON DELETE CASCADE,"
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, "auth_data_method INTEGER NOT NULL,"
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, "auth_data_comment TEXT NOT NULL,"
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, "auth_data_payload BYTEA NOT NULL"
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, ")"
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]
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authDataTable :: Table
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( Maybe (Field SqlInt4)
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, Field SqlInt4
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, Field SqlInt4
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, Field SqlText
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, Field SqlBytea
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)
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( Field SqlInt4
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, Field SqlInt4
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, Field SqlInt4
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, Field SqlText
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, Field SqlBytea
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)
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authDataTable = table "auth_data" (
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p5
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( tableField "auth_data_id"
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, tableField "auth_data_user"
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, tableField "auth_data_method"
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, tableField "auth_data_comment"
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, tableField "auth_data_payload"
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)
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)
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delayTime :: Int
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delayTime = 1 * 10 ^ (6 :: Int)
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generateRandomText :: IO T.Text
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generateRandomText = decodeUtf8 . B64.encode <$> random 23
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selectAuthOverviews
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:: Int
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-> PGS.Connection
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-> MateHandler [AuthOverview]
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selectAuthOverviews uid conn = do
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authData <- liftIO $ runSelect conn (proc () -> do
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(adid, aduid, admethod, adcomment, _) <-
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queryTable authDataTable -< ()
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restrict -< aduid .== C.constant uid
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returnA -< (adid, adcomment, admethod)
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) :: MateHandler
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[ ( Int
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, T.Text
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, Int
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)
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]
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return $ map
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(\(adid, adcomment, admethod) ->
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AuthOverview adid adcomment (toEnum admethod)
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)
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authData
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getUserAuthInfo
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:: Int
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-> AuthMethod
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-> PGS.Connection
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-> MateHandler AuthInfo
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getUserAuthInfo uid method conn = do
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authdata <- map (\(aid, auid, amethod, acomment, apayload) ->
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(aid, auid, amethod, acomment, decodeUtf8 $ B64.encode apayload)) <$>
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liftIO (do
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void $ threadDelay delayTime
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runSelect conn (proc () -> do
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(aid, auid, amethod, acomment, apayload) <-
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queryTable authDataTable -< ()
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restrict -<
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auid .== C.constant uid .&& amethod .== C.constant (fromEnum method)
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returnA -< (aid, auid, amethod, acomment, apayload)
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) :: IO
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[ ( Int
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, Int
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, Int
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, T.Text
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, ByteString
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)
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])
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if null authdata
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then
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-- generate mock AuthInfo
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liftIO $ do
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rand1 <- generateRandomText
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rand2 <- case method of
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ChallengeResponse -> Just <$> generateRandomText
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_ -> return Nothing
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return $ AuthInfo rand2 (AuthTicket rand1)
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else
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uncurry AuthInfo <$> newTicket uid method
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putUserAuthInfo
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:: Int
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-> AuthMethod
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-> T.Text
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-> T.Text
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-> PGS.Connection
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-> MateHandler Int
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putUserAuthInfo uid method comment payload conn =
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fmap head $ liftIO $ runInsert_ conn $ Insert
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{ iTable = authDataTable
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, iRows =
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[
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( C.constant (Nothing :: Maybe Int)
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, C.constant uid
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, C.constant (fromEnum method)
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, C.constant comment
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, C.constant (encodeUtf8 payload)
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)
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]
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, iReturning = rReturning (\(adid, _, _, _, _) -> adid)
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, iOnConflict = Nothing
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}
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deleteAuthDataById
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:: Int
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-> PGS.Connection
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-> MateHandler Int64
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deleteAuthDataById adid conn = liftIO $ runDelete_ conn $ Delete
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{ dTable = authDataTable
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, dWhere = \(aid, _, _, _, _) -> aid .== C.constant adid
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, dReturning = rCount
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}
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validateToken
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:: ByteString
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-> PGS.Connection
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-> Handler (Maybe (Int, AuthMethod))
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validateToken header conn = do
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tokens <- liftIO $ runSelect conn (
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keepWhen (\(tstr, _, _, _) ->
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tstr .== C.constant (decodeUtf8 header)) <<< queryTable tokenTable
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) :: Handler
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[ ( T.Text
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, Int
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, UTCTime
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, Int
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)
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]
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case tokens of
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[(_, uid, stamp, method)] -> do
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now <- liftIO getCurrentTime
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if diffUTCTime stamp now > 0
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then return $ Just (uid, toEnum method)
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else do
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void $ deleteToken (decodeUtf8 header) conn
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liftIO $ threadDelay delayTime
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throwError $ err401
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{ errBody = "Your token expired!"
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}
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_ -> do
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liftIO $ threadDelay delayTime
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throwError $ err401
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{ errBody = "No valid token found!"
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}
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generateToken
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:: Ticket
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-> AuthResponse
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-> PGS.Connection
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-> MateHandler AuthResult
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generateToken (Ticket _ tuid _ (method, _)) (AuthResponse response) conn = do
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authData <- liftIO $ runSelect conn (
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keepWhen (\(_, auid, amethod, _, _) ->
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auid .== C.constant tuid .&& amethod .== C.constant (fromEnum method))
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<<< queryTable authDataTable
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) :: MateHandler
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[ ( Int
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, Int
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, Int
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, T.Text
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, ByteString
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)
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]
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let userPayloads = map
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(\(_, _, _, _, payload) ->
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decodeUtf8 payload
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)
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authData
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authResult = case method of
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PrimaryPass -> validatePass response userPayloads
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SecondaryPass -> validatePass response userPayloads
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ChallengeResponse -> validateChallengeResponse response userPayloads
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-- liftIO $ print (response : userPayloads)
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if authResult
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then do
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token <- liftIO $ Token
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<$> generateRandomText
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<*> pure tuid
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<*> (addUTCTime (23*60) <$> getCurrentTime)
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<*> pure method
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void $ insertToken token conn
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return $ Granted (AuthToken $ tokenString token)
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else
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return Denied
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where
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validatePass =
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elem
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validateChallengeResponse _ _ =
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error "Validation of challenge response authentication not yet implemented"
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insertToken
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:: Token
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-> PGS.Connection
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-> MateHandler T.Text
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insertToken (Token tString tUser tExpiry tMethod) conn =
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fmap head $ liftIO $ runInsert_ conn $ Insert
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{ iTable = tokenTable
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, iRows =
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[
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( C.constant tString
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, C.constant tUser
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, C.constant tExpiry
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, C.constant (fromEnum tMethod)
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)
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]
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, iReturning = rReturning (\(ident, _, _, _) -> ident)
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, iOnConflict = Nothing
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}
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deleteToken
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:: T.Text
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-> PGS.Connection
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-> Handler Int64
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deleteToken tstr conn =
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liftIO $ runDelete_ conn $ Delete
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{ dTable = tokenTable
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, dWhere = \(rtstr, _, _, _) -> rtstr .== C.constant tstr
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, dReturning = rCount
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}
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deleteTokenByUserId
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:: Int
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-> PGS.Connection
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-> MateHandler Int64
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deleteTokenByUserId uid conn = liftIO $ runDelete_ conn $ Delete
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{ dTable = tokenTable
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, dWhere = \(_, rid, _, _) -> rid .== C.constant uid
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, dReturning = rCount
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}
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deleteOldTokens
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:: UTCTime
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-> PGS.Connection
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-> IO Int64
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deleteOldTokens now conn = runDelete_ conn $ Delete
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{ dTable = tokenTable
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, dWhere = \(_, _, expiry, _) -> expiry .< C.constant now
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, dReturning = rCount
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}
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newTicket :: Int -> AuthMethod -> MateHandler (Maybe T.Text, AuthTicket)
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newTicket ident method = do
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store <- asks rsTicketStore
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rand1 <- liftIO generateRandomText
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rand2 <- liftIO $ case method of
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ChallengeResponse -> Just <$> generateRandomText
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_ -> return Nothing
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later <- liftIO (addUTCTime 23 <$> getCurrentTime)
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let ticket = Ticket
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{ ticketId = AuthTicket rand1
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, ticketUser = ident
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, ticketExpiry = later
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, ticketMethod = (method, rand2)
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}
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liftIO $ atomically $ modifyTVar store (S.insert ticket)
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return (rand2, AuthTicket rand1)
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processAuthRequest
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:: AuthRequest
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-> S.Set Ticket
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-> PGS.Connection
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-> MateHandler AuthResult
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processAuthRequest (AuthRequest aticket hash) store conn = do
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let mticket = S.filter (\st -> ticketId st == aticket) store
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case S.toList mticket of
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[ticket] -> do
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-- liftIO $ putStrLn "there is a ticket..."
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now <- liftIO getCurrentTime
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liftIO $ threadDelay delayTime
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if now > ticketExpiry ticket
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then
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#if defined(DEVELOP)
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do
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mockticket <- Ticket <$>
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pure aticket <*>
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pure 1 <*>
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liftIO getCurrentTime <*>
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pure (PrimaryPass, Nothing)
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generateToken mockticket hash conn
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#else
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return Denied
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#endif
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else
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-- liftIO $ putStrLn "...and it is valid"
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generateToken ticket hash conn
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_ -> do
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liftIO $ threadDelay delayTime
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#if defined(DEVELOP)
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do
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mockticket <- Ticket <$>
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pure aticket <*>
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pure 1 <*>
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liftIO getCurrentTime <*>
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pure (PrimaryPass, Nothing)
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generateToken mockticket hash conn
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#else
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return Denied
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#endif
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processLogout
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:: Int
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-> PGS.Connection
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-> MateHandler ()
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processLogout uid conn =
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void $ deleteTokenByUserId uid conn
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