Merge branch 'scram-sha-256' of https://github.com/fumieval/mongodb into external

This commit is contained in:
Rene Vergara 2023-07-27 10:44:45 -05:00
commit 4a9a1cb63f
Signed by: pitmutt
GPG key ID: 65122AD495A7F5B2

View file

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