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kh: parse pubkeys at json parsing site, not later

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This ensures we crash early if the received data is in an unexpected
format or otherwise not sane.
This commit is contained in:
Fang 2021-09-01 17:27:13 +02:00
parent 7925171b77
commit aec9883c3b
No known key found for this signature in database
GPG Key ID: EB035760C1BBA972
1 changed files with 13 additions and 11 deletions
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24
pkg/hs/urbit-king/lib/Urbit/Vere/Dawn.hs
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@ -42,12 +42,10 @@ import qualified Network.HTTP.Types as HT
-- Conversion Utilities --------------------------------------------------------
passFromText :: Text -> Text -> Int -> Pass
passFromText enc aut sut
passFromBytes :: ByteString -> ByteString -> Int -> Pass
passFromBytes enc aut sut
| sut /= 1 = Pass (Ed.PublicKey mempty) (Ed.PublicKey mempty)
| otherwise = Pass (Ed.PublicKey $ grab aut) (Ed.PublicKey $ grab enc)
where
grab = reverse . toBytes . hexString . removePrefix . encodeUtf8
| otherwise = Pass (Ed.PublicKey aut) (Ed.PublicKey enc)
clanFromShip :: Ship -> Ob.Class
clanFromShip = Ob.clan . Ob.patp . fromIntegral
@ -186,17 +184,21 @@ instance FromJSON PointNetwork where
data PointKeys = PointKeys
{ pkLife :: Life
, pkSuite :: Int
, pkAuth :: Text --NOTE 0xhex string
, pkCrypt :: Text --NOTE 0xhex string
, pkAuth :: ByteString
, pkCrypt :: ByteString
} deriving (Show, Eq, Generic)
instance FromJSON PointKeys where
parseJSON (Object o) = do
pkLife <- o .: "life"
pkSuite <- o .: "suite"
pkAuth <- o .: "auth"
pkCrypt <- o .: "crypt"
rawAuth <- o .: "auth"
rawCrypt <- o .: "crypt"
let pkAuth = parseKey rawAuth
let pkCrypt = parseKey rawCrypt
pure PointKeys{..}
where
parseKey = reverse . toBytes . hexString . removePrefix . encodeUtf8
parseJSON _ = do error "failed to parse PointKeys json"
data PointSponsor = PointSponsor
@ -236,7 +238,7 @@ parseAzimuthPoint (PointRequest point) response = EthPoint{..}
Left _ -> Nothing
Right s -> Just
( fromIntegral $ pkLife key
, passFromText (pkCrypt key) (pkAuth key) (pkSuite key)
, passFromBytes (pkCrypt key) (pkAuth key) (pkSuite key)
, fromIntegral $ pnRift net
, (psHas $ pnSponsor net, Ship $ fromIntegral $ Ob.fromPatp s)
, Nothing --NOTE goes unused currently, so we simply put Nothing
@ -260,7 +262,7 @@ parseGalaxyTableEntry (PointRequest point) response = (ship, (rift, life, pass))
ship = Ship $ fromIntegral point
rift = fromIntegral $ pnRift net
life = fromIntegral $ pkLife keys
pass = passFromText (pkCrypt keys) (pkAuth keys) (pkSuite keys)
pass = passFromBytes (pkCrypt keys) (pkAuth keys) (pkSuite keys)
removePrefix :: ByteString -> ByteString
removePrefix withOhEx