Merge branch 'scram-sha-256' of https://github.com/fumieval/mongodb into external
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commit
4a9a1cb63f
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1 changed files with 81 additions and 48 deletions
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@ -11,7 +11,7 @@ module Database.MongoDB.Query (
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-- * Database
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Database, allDatabases, useDb, thisDatabase,
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-- ** Authentication
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Username, Password, auth, authMongoCR, authSCRAMSHA1,
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Username, Password, auth, authMongoCR, authSCRAMSHA1, authSCRAMSHA256,
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-- * Collection
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Collection, allCollections,
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-- ** Selection
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@ -61,8 +61,10 @@ import Control.Monad
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)
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import Control.Monad.Reader (MonadReader, ReaderT, ask, asks, local, runReaderT)
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import Control.Monad.Trans (MonadIO, liftIO, lift)
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import Control.Monad.Trans.Except
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import qualified Crypto.Hash.MD5 as MD5
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import qualified Crypto.Hash.SHA1 as SHA1
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import qualified Crypto.Hash.SHA256 as SHA256
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import qualified Crypto.MAC.HMAC as HMAC
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import qualified Crypto.Nonce as Nonce
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import Data.Binary.Put (runPut)
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@ -285,62 +287,93 @@ authMongoCR usr pss = do
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n <- at "nonce" <$> runCommand ["getnonce" =: (1 :: Int)]
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true1 "ok" <$> runCommand ["authenticate" =: (1 :: Int), "user" =: usr, "nonce" =: n, "key" =: pwKey n usr pss]
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data HashAlgorithm = SHA1 | SHA256 deriving Show
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hash :: HashAlgorithm -> B.ByteString -> B.ByteString
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hash SHA1 = SHA1.hash
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hash SHA256 = SHA256.hash
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authSCRAMSHA1 :: MonadIO m => Username -> Password -> Action m Bool
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authSCRAMSHA1 = authSCRAMWith SHA1
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authSCRAMSHA256 :: MonadIO m => Username -> Password -> Action m Bool
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authSCRAMSHA256 = authSCRAMWith SHA256
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toAuthResult :: Functor m => ExceptT String (Action m) () -> Action m Bool
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toAuthResult = fmap (either (const False) (const True)) . runExceptT
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-- | It should technically perform SASLprep, but the implementation is currently id
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saslprep :: Text -> Text
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saslprep = id
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authSCRAMWith :: MonadIO m => HashAlgorithm -> Username -> Password -> Action m Bool
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-- ^ Authenticate with the current database, using the SCRAM-SHA-1 authentication mechanism (default in MongoDB server >= 3.0)
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authSCRAMSHA1 un pw = do
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let hmac = HMAC.hmac SHA1.hash 64
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authSCRAMWith algo un pw = toAuthResult $ do
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let hmac = HMAC.hmac (hash algo) 64
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nonce <- liftIO (Nonce.withGenerator Nonce.nonce128 <&> B64.encode)
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let firstBare = B.concat [B.pack $ "n=" ++ T.unpack un ++ ",r=", nonce]
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let client1 = ["saslStart" =: (1 :: Int), "mechanism" =: ("SCRAM-SHA-1" :: String), "payload" =: (B.unpack . B64.encode $ B.concat [B.pack "n,,", firstBare]), "autoAuthorize" =: (1 :: Int)]
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server1 <- runCommand client1
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let client1 =
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[ "saslStart" =: (1 :: Int)
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, "mechanism" =: case algo of
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SHA1 -> "SCRAM-SHA-1" :: String
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SHA256 -> "SCRAM-SHA-256"
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, "payload" =: (B.unpack . B64.encode $ B.concat [B.pack "n,,", firstBare])
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, "autoAuthorize" =: (1 :: Int)
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]
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server1 <- lift $ runCommand client1
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shortcircuit (true1 "ok" server1) $ do
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shortcircuit (true1 "ok" server1) (show server1)
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let serverPayload1 = B64.decodeLenient . B.pack . at "payload" $ server1
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let serverData1 = parseSCRAM serverPayload1
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let iterations = read . B.unpack $ Map.findWithDefault "1" "i" serverData1
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let salt = B64.decodeLenient $ Map.findWithDefault "" "s" serverData1
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let snonce = Map.findWithDefault "" "r" serverData1
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shortcircuit (B.isInfixOf nonce snonce) $ do
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shortcircuit (B.isInfixOf nonce snonce) "nonce"
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let withoutProof = B.concat [B.pack "c=biws,r=", snonce]
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let digestS = B.pack $ T.unpack un ++ ":mongo:" ++ T.unpack pw
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let digest = B16.encode $ MD5.hash digestS
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let saltedPass = scramHI digest salt iterations
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let digest = case algo of
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SHA1 -> B16.encode $ MD5.hash $ B.pack $ T.unpack un ++ ":mongo:" ++ T.unpack pw
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SHA256 -> B.pack $ T.unpack $ saslprep pw
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let saltedPass = scramHI algo digest salt iterations
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let clientKey = hmac saltedPass (B.pack "Client Key")
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let storedKey = SHA1.hash clientKey
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let storedKey = hash algo clientKey
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let authMsg = B.concat [firstBare, B.pack ",", serverPayload1, B.pack ",", withoutProof]
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let clientSig = hmac storedKey authMsg
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let pval = B64.encode . BS.pack $ BS.zipWith xor clientKey clientSig
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let clientFinal = B.concat [withoutProof, B.pack ",p=", pval]
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let client2 =
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[ "saslContinue" =: (1 :: Int)
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, "conversationId" =: (at "conversationId" server1 :: Int)
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, "payload" =: B.unpack (B64.encode clientFinal)
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]
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server2 <- lift $ runCommand client2
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shortcircuit (true1 "ok" server2) (show server2)
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let serverKey = hmac saltedPass (B.pack "Server Key")
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let serverSig = B64.encode $ hmac serverKey authMsg
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let client2 = ["saslContinue" =: (1 :: Int), "conversationId" =: (at "conversationId" server1 :: Int), "payload" =: B.unpack (B64.encode clientFinal)]
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server2 <- runCommand client2
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shortcircuit (true1 "ok" server2) $ do
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let serverPayload2 = B64.decodeLenient . B.pack $ at "payload" server2
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let serverData2 = parseSCRAM serverPayload2
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let serverSigComp = Map.findWithDefault "" "v" serverData2
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shortcircuit (serverSig == serverSigComp) $ do
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let done = true1 "done" server2
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if done
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then return True
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shortcircuit (serverSig == serverSigComp) "server signature does not match"
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if true1 "done" server2
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then return ()
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else do
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let client2Step2 = [ "saslContinue" =: (1 :: Int)
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, "conversationId" =: (at "conversationId" server1 :: Int)
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, "payload" =: String ""]
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server3 <- runCommand client2Step2
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shortcircuit (true1 "ok" server3) $ do
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return True
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where
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shortcircuit True f = f
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shortcircuit False _ = return False
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server3 <- lift $ runCommand client2Step2
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shortcircuit (true1 "ok" server3) "server3"
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scramHI :: B.ByteString -> B.ByteString -> Int -> B.ByteString
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scramHI digest salt iters = snd $ foldl com (u1, u1) [1..(iters-1)]
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shortcircuit :: Monad m => Bool -> String -> ExceptT String m ()
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shortcircuit True _ = pure ()
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shortcircuit False reason = throwE (show reason)
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scramHI :: HashAlgorithm -> B.ByteString -> B.ByteString -> Int -> B.ByteString
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scramHI algo digest salt iters = snd $ foldl com (u1, u1) [1..(iters-1)]
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where
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hmacd = HMAC.hmac SHA1.hash 64 digest
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hmacd = HMAC.hmac (hash algo) 64 digest
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u1 = hmacd (B.concat [salt, BS.pack [0, 0, 0, 1]])
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com (u,uc) _ = let u' = hmacd u in (u', BS.pack $ BS.zipWith xor uc u')
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