PWFile auth-plugin

config/settings.yml

@@ -19,6 +19,7 @@ should-log-all: "_env:LOG_ALL:false"
 # mutable-static: false
 # skip-combining: false
 auth-dummy-login: "_env:DUMMY_LOGIN:false"
+auth-pwfile: "_env:PWFILE:"
 allow-deprecated: "_env:ALLOW_DEPRECATED:false"
 
 # NB: If you need a numeric value (e.g. 123) to parse as a String, wrap it in single quotes (e.g. "_env:PGPASS:'123'")

models

@@ -1,4 +1,4 @@
-User
+User json
     plugin         Text
     ident          Text
     matrikelnummer Text Maybe
@@ -8,6 +8,7 @@ User
     theme          Theme default='default'
     UniqueAuthentication plugin ident
     UniqueEmail email
+    deriving Show
 UserAdmin
     user   UserId
     school SchoolId

src/Application.hs

@@ -18,6 +18,7 @@ module Application
     -- * for GHCI
     , handler
     , db
+    , addPWEntry
     ) where
 
 import Control.Monad.Logger                 (liftLoc, runLoggingT)
@@ -37,6 +38,15 @@ import Network.Wai.Middleware.RequestLogger (Destination (Logger),
 import System.Log.FastLogger                (defaultBufSize, newStdoutLoggerSet,
                                              toLogStr)
 
+import qualified Crypto.KDF.Argon2 as Argon2
+import Crypto.Error (CryptoFailable(..))
+import qualified Data.ByteString.Base64.URL as Base64 (encode)
+import qualified Data.Text.Encoding as Text
+import Crypto.Random (MonadRandom(..))
+
+import qualified Data.ByteString.Char8 as BS
+import qualified Data.Yaml as Yaml
+
 -- Import all relevant handler modules here.
 -- (HPack takes care to add new modules to our cabal file nowadays.)
 import Handler.Common
@@ -197,3 +207,14 @@ handler h = getAppDevSettings >>= makeFoundation >>= flip unsafeHandler h
 -- | Run DB queries
 db :: ReaderT SqlBackend (HandlerT UniWorX IO) a -> IO a
 db = handler . runDB
+
+addPWEntry :: FilePath {-^ Password file -}
+           -> User
+           -> Text {-^ Password -}
+           -> IO ()
+addPWEntry pwFile pwUser (Text.encodeUtf8 -> pw) = do
+  pwSalt'@(Text.decodeUtf8 . Base64.encode -> pwSalt) <- getRandomBytes 32
+  let pwEntry = PWEntry{..}
+      CryptoPassed (Text.decodeUtf8 . Base64.encode -> pwHash) = Argon2.hash Argon2.defaultOptions pw pwSalt' 256
+  c <- either (const []) id <$> Yaml.decodeFileEither pwFile
+  Yaml.encodeFile pwFile $ c ++ [pwEntry]

src/Foundation.hs

@@ -38,10 +38,12 @@ import qualified Data.Text.Encoding as TE
 import Data.ByteArray (convert)
 import Crypto.Hash (Digest, SHAKE256)
 import Crypto.Hash.Conduit (sinkHash)
+import qualified Crypto.KDF.Argon2 as Argon2
+import Crypto.Error (CryptoFailable(..))
 
 import qualified Data.CryptoID (CryptoID) -- for DisplayAble instance only
 
-import qualified Data.ByteString.Base64.URL as Base64 (encode)
+import qualified Data.ByteString.Base64.URL as Base64 (encode, decodeLenient)
 
 import Data.ByteString (ByteString)
 import qualified Data.ByteString.Lazy as Lazy.ByteString
@@ -74,6 +76,13 @@ import Handler.Utils.DateTime
 import Control.Lens
 import Utils.Lens
 
+import Data.Aeson
+import Data.Aeson.TH
+import qualified Data.Yaml as Yaml
+
+import Text.Shakespeare.Text (st)
+
+
 
 -- -- TODO: Move the following to the appropriate place, if DisplayAble is kept
 instance DisplayAble TermId where
@@ -936,6 +945,14 @@ instance YesodAuth UniWorX where
     -- Override the above two destinations when a Referer: header is present
     redirectToReferer _ = True
 
+    loginHandler = do
+      tp <- getRouteToParent
+      lift . authLayout $ do
+        master <- getYesod
+        let authPlugins' = authPlugins master
+        $logDebugS "Auth" $ "Enabled plugins: " <> Text.intercalate ", " (map apName authPlugins')
+        forM_ authPlugins' $ flip apLogin tp
+
     authenticate creds@(Creds{..}) = runDB . fmap (either id id) . runExceptT $ do
       let (userPlugin, userIdent)
             | isDummy
@@ -944,11 +961,12 @@ instance YesodAuth UniWorX where
             | otherwise
             = (credsPlugin, credsIdent)
           isDummy = credsPlugin == "dummy"
+          isPWFile = credsPlugin == "PWFile"
           uAuth = UniqueAuthentication userPlugin userIdent
 
       $logDebugS "auth" $ tshow ((userPlugin, userIdent), creds)
 
-      when isDummy . (throwError =<<) . lift $
+      when (isDummy || isPWFile) . (throwError =<<) . lift $
           maybe (UserError $ IdentifierNotFound credsIdent) (Authenticated . entityKey) <$> getBy uAuth
 
       let
@@ -991,9 +1009,38 @@ instance YesodAuth UniWorX where
     authPlugins app = [genericAuthLDAP $ ldapConfig app] ++ extraAuthPlugins
         -- Enable authDummy login if enabled.
         where extraAuthPlugins = [authDummy | appAuthDummyLogin $ appSettings app]
-
+                              ++ [authPWFile fp | fp <- maybeToList . appAuthPWFile $ appSettings app]
     authHttpManager = getHttpManager
 
+authPWFile :: FilePath -> AuthPlugin UniWorX
+authPWFile fp = AuthPlugin{..}
+  where
+    apName = "PWFile"
+    apLogin = mempty
+    apDispatch "GET" [] = do
+      authData <- lookupBasicAuth
+      pwdata <- liftIO $ Yaml.decodeFileEither fp
+      case (authData, pwdata) of
+        (_, Left _) -> permissionDenied "Invalid password file"
+        (Nothing, _) -> do
+          addHeader "WWW-Authenticate" [st|Basic realm="uni2work maintenance auth" charset="UTF-8"|]
+          notAuthenticated
+        (Just (usr, (Text.encodeUtf8 -> pw)), Right pwdata')
+          | [ PWEntry{ pwUser = pwUser@(User{..}), pwHash = (Base64.decodeLenient . Text.encodeUtf8 -> pwHash), pwSalt = (Base64.decodeLenient . Text.encodeUtf8 -> pwSalt) } ]
+              <- [ pwe | pwe@PWEntry{..} <- pwdata'
+                       , let User{..} = pwUser
+                       , userIdent  == usr
+                       , userPlugin == apName
+                 ]
+          , CryptoPassed hash <- Argon2.hash Argon2.defaultOptions pw pwSalt 256
+          , hash == pwHash
+            -> lift $ do
+              runDB . void $ insertUnique pwUser
+              setCredsRedirect $ Creds apName userIdent []
+          | otherwise -> permissionDenied "Invalid auth"
+    apDispatch _ _ = notFound
+
+
 ldapConfig :: UniWorX -> LDAPConfig
 ldapConfig _app@(appSettings -> settings) = LDAPConfig
   { usernameFilter = \u -> principalName <> "=" <> u

src/Model.hs

@@ -17,6 +17,7 @@ import Database.Persist.Quasi
 -- import Data.Time
 -- import Data.ByteString
 import Model.Types
+import Data.Aeson.TH
 
 -- You can define all of your database entities in the entities file.
 -- You can find more information on persistent and how to declare entities
@@ -25,5 +26,8 @@ import Model.Types
 share [mkPersist sqlSettings, mkDeleteCascade sqlSettings, mkMigrate "migrateAll"]
     $(persistFileWith lowerCaseSettings "models")
 
-
-
+data PWEntry = PWEntry
+  { pwUser :: User
+  , pwSalt, pwHash :: Text
+  } deriving (Show)
+$(deriveJSON defaultOptions ''PWEntry)

src/Model/Types.hs

@@ -262,6 +262,7 @@ data Theme       --Simply add Themes to this type only. CamelCase will be conver
   | SkyLove
   deriving (Eq,Ord,Bounded,Enum)
 
+$(deriveJSON defaultOptions ''Theme)
 $(deriveShowWith uncamel ''Theme)                             -- show    for internal use in css/js
 $(deriveSimpleWith ''DisplayAble 'display camelSpace ''Theme) -- display to display at user
 

src/Settings.hs

@@ -71,6 +71,8 @@ data AppSettings = AppSettings
 
     , appAuthDummyLogin         :: Bool
     -- ^ Indicate if auth dummy login should be enabled.
+    , appAuthPWFile             :: Maybe FilePath
+    -- ^ If set authenticate against a local password file
     , appAllowDeprecated        :: Bool
     -- ^ Indicate if deprecated routes are accessible for everyone
     }
@@ -106,6 +108,7 @@ instance FromJSON AppSettings where
         appCryptoIDKeyFile        <- o .:  "cryptoid-keyfile"
 
         appAuthDummyLogin         <- o .:? "auth-dummy-login"      .!= defaultDev
+        appAuthPWFile             <- ((\f -> f <$ guard (not $ null f)) =<<) <$> o .:? "auth-pwfile"
         appAllowDeprecated        <- o .:? "allow-deprecated"      .!= defaultDev
 
         return AppSettings {..}

start.sh

@@ -5,5 +5,6 @@ export DETAILED_LOGGING=true
 export LOG_ALL=true
 export DUMMY_LOGIN=true
 export ALLOW_DEPRECATED=true
+export PWFILE=users.yml
 
 exec -- stack exec -- yesod devel