mateamt/src/Model/Auth.hs

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{-# LANGUAGE CPP #-}
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{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}
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)
import Control.Monad.Reader (ask)
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import Control.Concurrent (threadDelay)
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import Control.Concurrent.STM
import Data.Profunctor.Product (p4)
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import qualified Database.PostgreSQL.Simple as PGS
import Data.Int (Int64)
import qualified Data.Text as T
import Data.Text.Encoding
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import qualified Data.Set as S
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import Data.Time.Calendar (Day)
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import Data.Time.Clock
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import Data.ByteString (ByteString)
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import Data.ByteString.Random
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import Data.Maybe (fromMaybe)
import Opaleye hiding (null)
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import qualified Opaleye.Constant as C
-- internal imports
import Types.Auth
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import Types.Reader
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import Model.User
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initToken :: PGS.Query
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initToken = mconcat
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[ "CREATE TABLE IF NOT EXISTS \"token\" ("
, "token_string TEXT NOT NULL PRIMARY KEY,"
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, "token_user INTEGER REFERENCES \"user\"(user_id) NOT NULL,"
, "token_expiry TIMESTAMPTZ NOT NULL,"
, "token_method INT NOT NULL"
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, ")"
]
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tokenTable :: Table
( Field SqlText
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, Field SqlInt4
, Field SqlTimestamptz
, Field SqlInt4
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)
( Field SqlText
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, Field SqlInt4
, Field SqlTimestamptz
, Field SqlInt4
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)
tokenTable = table "token" (
p4
( tableField "token_string"
, tableField "token_user"
, tableField "token_expiry"
, tableField "token_method"
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)
)
initAuthData :: PGS.Query
initAuthData = mconcat
[ "CREATE TABLE IF NOT EXISTS \"auth_data\" ("
, "auth_data_id SERIAL PRIMARY KEY,"
, "auth_data_user INTEGER NOT NULL REFERENCES \"user\"(\"user_id\") ON DELETE CASCADE,"
, "auth_data_method INTEGER NOT NULL,"
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, "auth_data_payload TEXT NOT NULL"
, ")"
]
authDataTable :: Table
( Maybe (Field SqlInt4)
, Field SqlInt4
, Field SqlInt4
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, Field SqlText
)
( Field SqlInt4
, Field SqlInt4
, Field SqlInt4
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, Field SqlText
)
authDataTable = table "auth_data" (
p4
( tableField "auth_data_id"
, tableField "auth_data_user"
, tableField "auth_data_method"
, tableField "auth_data_payload"
)
)
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delayTime :: Int
delayTime = 1 * 10 ^ (6 :: Int)
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getUserAuthInfo
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:: Int
-> AuthMethod
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-> MateHandler AuthInfo
getUserAuthInfo uid method = do
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conn <- rsConnection <$> ask
authdata <- liftIO $ do
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void $ threadDelay delayTime
runSelect conn (
keepWhen (\(_, duid, dmethod, _) ->
duid .== C.constant uid .&& dmethod .== C.constant (fromEnum method))
<<< queryTable authDataTable
) :: IO
[ ( Int
, Int
, Int
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, T.Text
)
]
if null authdata
then
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-- generate mock AuthInfo
liftIO $ do
rand1 <- decodeUtf8 <$> random 23
rand2 <- case method of
ChallengeResponse -> Just <$> decodeUtf8 <$> random 23
_ -> return Nothing
return $ AuthInfo rand2 (AuthTicket rand1)
else
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uncurry AuthInfo <$> newTicket uid method
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validateToken
:: ByteString
-> PGS.Connection
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-> Handler (Maybe Int)
validateToken header conn = do
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tokens <- liftIO $ runSelect conn (
keepWhen (\(tstr, _, _, _) ->
tstr .== C.constant (decodeUtf8 header)) <<< queryTable tokenTable
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) :: Handler
[ ( T.Text
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, Int
, UTCTime
, Int
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)
]
case tokens of
[(_, uid, stamp, method)] -> do
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now <- liftIO $ getCurrentTime
if diffUTCTime stamp now > 0
then return $ Just uid
else do
void $ deleteToken (decodeUtf8 header) conn
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liftIO $ threadDelay delayTime
throwError $ err401
{ errBody = "Your token expired!"
}
_ -> do
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liftIO $ threadDelay delayTime
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throwError $ err401
{ errBody = "No valid token found!"
}
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generateToken
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:: Ticket
-> AuthResponse
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-> MateHandler AuthResult
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generateToken (Ticket _ tuid _ (method, pl)) (AuthResponse response) = do
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conn <- rsConnection <$> ask
authData <- liftIO $ runSelect conn (
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keepWhen (\(_, auid, amethod, _) ->
auid .== C.constant tuid .&& amethod .== C.constant (fromEnum method))
<<< queryTable authDataTable
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) :: MateHandler
[ ( Int
, Int
, Int
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, T.Text
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)
]
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let userPayloads = map (\(_, _, _, payload) -> payload) authData
authResult = case method of
PrimaryPass -> validatePass response userPayloads
SecondaryPass -> validatePass response userPayloads
ChallengeResponse -> validateChallengeResponse response userPayloads
if authResult
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then do
token <- liftIO $ Token
<$> (decodeUtf8 <$> random 23)
<*> pure tuid
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<*> (addUTCTime (23*60) <$> getCurrentTime)
<*> pure method
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void $ insertToken token conn
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return $ Granted (AuthToken $ tokenString token)
else
return Denied
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where
validatePass provided presents =
any (\present -> provided == present) presents
validateChallengeResponse provided presents =
error "Validation of challnge response authentication not yet implemented"
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insertToken
:: Token
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-> PGS.Connection
-> MateHandler T.Text
insertToken (Token tString tUser tExpiry tMethod) conn =
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fmap head $ liftIO $ runInsert_ conn $ Insert
{ iTable = tokenTable
, iRows =
[
( C.constant tString
, C.constant tUser
, C.constant tExpiry
, C.constant (fromEnum tMethod)
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)
]
, iReturning = rReturning (\(ident, _, _, _) -> ident)
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, iOnConflict = Nothing
}
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deleteToken
:: T.Text
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-> PGS.Connection
-> Handler Int64
deleteToken tstr conn =
liftIO $ runDelete_ conn $ Delete
{ dTable = tokenTable
, dWhere = (\(rtstr, _, _, _) -> rtstr .== C.constant tstr)
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, dReturning = rCount
}
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deleteTokenByUserId
:: Int
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-> PGS.Connection
-> MateHandler Int64
deleteTokenByUserId uid conn = liftIO $ runDelete_ conn $ Delete
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{ dTable = tokenTable
, dWhere = (\(_, rid, _, _) -> rid .== C.constant uid)
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, dReturning = rCount
}
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newTicket :: Int -> AuthMethod -> MateHandler (Maybe T.Text, AuthTicket)
newTicket ident method = do
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store <- rsTicketStore <$> ask
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rand1 <- liftIO $ (decodeUtf8 <$> random 23)
rand2 <- liftIO $ case method of
ChallengeResponse -> Just <$> (decodeUtf8 <$> random 23)
_ -> 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 -> S.insert ticket s)
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return (rand2, AuthTicket rand1)
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processAuthRequest
:: AuthRequest
-> MateHandler AuthResult
processAuthRequest (AuthRequest aticket hash) = do
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store <- liftIO . readTVarIO =<< rsTicketStore <$> ask
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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
now <- liftIO $ getCurrentTime
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liftIO $ threadDelay delayTime
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if now > ticketExpiry ticket
then
#if defined(DEVELOP)
do
mockticket <- Ticket <$>
pure aticket <*>
pure 1 <*>
liftIO getCurrentTime <*>
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pure (PrimaryPass, Nothing)
generateToken mockticket hash
#else
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return Denied
#endif
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else
generateToken ticket hash
_ -> do
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liftIO $ threadDelay delayTime
#if defined(DEVELOP)
do
mockticket <- Ticket <$>
pure aticket <*>
pure 1 <*>
liftIO getCurrentTime <*>
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pure (PrimaryPass, Nothing)
generateToken mockticket hash
#else
return Denied
#endif
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processLogout
:: Int
-> MateHandler ()
processLogout uid = do
conn <- rsConnection <$> ask
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void $ deleteTokenByUserId uid conn