mateamt/src/Model/Auth.hs

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{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE Arrows #-}
{-# 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
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.Clock
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import Data.ByteString as B (ByteString)
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import Data.ByteString.Random
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
-- internal imports
import Types.Auth
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import Types.Reader
import Classes
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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_comment TEXT NOT NULL,"
, "auth_data_payload BYTEA NOT NULL"
, ")"
]
authDataTable :: Table
( Maybe (Field SqlInt4)
, Field SqlInt4
, Field SqlInt4
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, Field SqlText
, Field SqlBytea
)
( Field SqlInt4
, Field SqlInt4
, Field SqlInt4
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, Field SqlText
, Field SqlBytea
)
authDataTable = table "auth_data" (
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p5
( tableField "auth_data_id"
, tableField "auth_data_user"
, tableField "auth_data_method"
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, tableField "auth_data_comment"
, tableField "auth_data_payload"
)
)
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delayTime :: Int
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
:: Int
-> PGS.Connection
-> MateHandler [AuthOverview]
selectAuthOverviews uid conn = do
liftIO $ map fromDatabase <$> runSelect conn (proc () -> do
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(adid, aduid, admethod, adcomment, _) <-
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queryTable authDataTable -< ()
restrict -< aduid .== C.constant uid
returnA -< (adid, adcomment, admethod)
)
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getUserAuthInfo
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:: Int
-> AuthMethod
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-> PGS.Connection
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-> MateHandler AuthInfo
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getUserAuthInfo uid method conn = do
authdata <-
liftIO $ do
void $ threadDelay delayTime
map fromDatabase <$> runSelect conn (proc () -> do
(aid, auid, amethod, acomment, apayload) <-
queryTable authDataTable -< ()
restrict -<
auid .== C.constant uid .&& amethod .== C.constant (fromEnum method)
returnA -< (aid, auid, amethod, acomment, apayload)
) :: IO [AuthData]
if null authdata
then
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-- generate mock AuthInfo
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
return $ AuthInfo rand2 (AuthTicket rand1)
else
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uncurry AuthInfo <$> newTicket uid method
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putUserAuthInfo
:: Int
-> AuthMethod
-> T.Text
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-> T.Text
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-> PGS.Connection
-> MateHandler Int
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putUserAuthInfo uid method comment payload conn =
fmap head $ liftIO $ runInsert_ conn $ Insert
{ iTable = authDataTable
, iRows =
[
( C.constant (Nothing :: Maybe Int)
, C.constant uid
, C.constant (fromEnum method)
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, C.constant comment
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, C.constant (either error id $ B64.decode $ encodeUtf8 payload)
)
]
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, iReturning = rReturning (\(adid, _, _, _, _) -> adid)
, iOnConflict = Nothing
}
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deleteAuthDataById
:: Int
-> PGS.Connection
-> MateHandler Int64
deleteAuthDataById adid conn = liftIO $ runDelete_ conn $ Delete
{ dTable = authDataTable
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, dWhere = \(aid, _, _, _, _) -> aid .== C.constant adid
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, dReturning = rCount
}
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validateToken
:: ByteString
-> PGS.Connection
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-> Handler (Maybe (Int, AuthMethod))
validateToken header conn = do
tokens <- liftIO $ map fromDatabase <$> runSelect conn (
keepWhen (\(tstr, _, _, _) ->
tstr .== C.constant (decodeUtf8 header)) <<< queryTable tokenTable
)
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case tokens of
[(Token _ uid stamp method)] -> do
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now <- liftIO getCurrentTime
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if diffUTCTime stamp now > 0
then return $ Just (uid, method)
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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-> PGS.Connection
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-> MateHandler AuthResult
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generateToken (Ticket _ tuid _ (method, _)) (AuthResponse response) conn = do
authData <- liftIO $ map fromDatabase <$> runSelect conn (
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keepWhen (\(_, auid, amethod, _, _) ->
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auid .== C.constant tuid .&& amethod .== C.constant (fromEnum method))
<<< queryTable authDataTable
) :: MateHandler [AuthData]
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let userPayloads = map
authDataPayload
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authData
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authResult = case method of
PrimaryPass -> validatePass response userPayloads
SecondaryPass -> validatePass response userPayloads
ChallengeResponse -> validateChallengeResponse response userPayloads
-- liftIO $ print (response : userPayloads)
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if authResult
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then do
token <- liftIO $ Token
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<$> generateRandomText
<*> pure tuid
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<*> (addUTCTime (23*60) <$> 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
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validatePass =
elem
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validateChallengeResponse _ _ =
error "Validation of challenge 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
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, 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
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, dWhere = \(_, rid, _, _) -> rid .== C.constant uid
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, dReturning = rCount
}
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deleteOldTokens
:: UTCTime
-> PGS.Connection
-> IO Int64
deleteOldTokens now conn = runDelete_ conn $ Delete
{ dTable = tokenTable
, dWhere = \(_, _, expiry, _) -> expiry .< C.constant now
, dReturning = rCount
}
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newTicket :: Int -> AuthMethod -> MateHandler (Maybe T.Text, AuthTicket)
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
:: AuthRequest
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-> S.Set Ticket
-> 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
-- 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
then
return Denied
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else
-- liftIO $ putStrLn "...and it is valid"
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generateToken ticket hash conn
_ -> do
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liftIO $ threadDelay delayTime
return Denied
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processLogout
:: 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