module Network.PeyoTLS.Codec.Extension (
Extension(..), isRnInfo, emptyRnInfo, HSAlg(..), SignAlg(..), HashAlg(..) ) where
import Control.Applicative ((<$>), (<*>))
import Data.Bits (shiftL, (.|.))
import Data.Word (Word8, Word16)
import qualified Data.ByteString as BS
import qualified Codec.Bytable.BigEndian as B
import qualified Crypto.Types.PubKey.DH as DH
import qualified Crypto.Types.PubKey.ECC as ECC
import Network.PeyoTLS.Codec.HSAlg(HSAlg(..), HashAlg(..), SignAlg(..))
modNm :: String
modNm = "Network.PeyoTLS.Codec.Extension"
data Extension
= ESName [SName]
| EECrv [ECC.CurveName] | EEPFrmt [EPFrmt]
| ESAlg [HSAlg] | ESsnTcktTls BS.ByteString
| ENxPrtNego BS.ByteString | ERnInfo BS.ByteString
| ERaw EType BS.ByteString
deriving (Show, Eq)
instance B.Bytable Extension where
encode (ESName n) = B.encode . ERaw TSName . B.addLen w16 $ cmap B.encode n
encode (EECrv c) = B.encode . ERaw TECrv . B.addLen w16 $ cmap B.encode c
encode (EEPFrmt f) = B.encode . ERaw TEPFrmt . B.addLen w8 $ cmap B.encode f
encode (ESAlg sa) = B.encode . ERaw TESAlg . B.addLen w16 $ cmap B.encode sa
encode (ESsnTcktTls t) = B.encode $ ERaw TSsnTcktTls t
encode (ENxPrtNego n) = B.encode $ ERaw TNxPrtNego n
encode (ERnInfo i) = B.encode . ERaw TRnInfo $ B.addLen w8 i
encode (ERaw t e) = B.encode t `BS.append` B.addLen w16 e
decode = B.evalBytableM B.parse
instance B.Parsable Extension where
parse = (,) <$> B.take 2 <*> B.take 2 >>= \(t, l) -> case t of
TSName -> ESName <$> (flip B.list B.parse =<< B.take 2)
TECrv -> EECrv <$> (flip B.list (B.take 2) =<< B.take 2)
TEPFrmt -> EEPFrmt <$> (flip B.list (B.take 1) =<< B.take 1)
TESAlg -> ESAlg <$> (flip B.list (B.take 2) =<< B.take 2)
TSsnTcktTls -> ESsnTcktTls <$> B.take l
TNxPrtNego -> ENxPrtNego <$> B.take l
TRnInfo -> ERnInfo <$> (B.take =<< B.take 1)
_ -> ERaw t <$> B.take l
cmap :: (a -> BS.ByteString) -> [a] -> BS.ByteString
cmap = (BS.concat .) . map
data EType
= TSName | TECrv | TEPFrmt | TESAlg | TSsnTcktTls
| TNxPrtNego | TRnInfo | TRaw Word16 deriving (Show, Eq)
instance B.Bytable EType where
encode TSName = B.encode (0 :: Word16)
encode TECrv = B.encode (10 :: Word16)
encode TEPFrmt = B.encode (11 :: Word16)
encode TESAlg = B.encode (13 :: Word16)
encode TSsnTcktTls = B.encode (35 :: Word16)
encode TNxPrtNego = B.encode (13172 :: Word16)
encode TRnInfo = B.encode (65281 :: Word16)
encode (TRaw et) = B.encode et
decode bs = case BS.unpack bs of
[w1, w2] -> Right $
case fromIntegral w1 `shiftL` 8 .|. fromIntegral w2 of
0 -> TSName
10 -> TECrv
11 -> TEPFrmt
13 -> TESAlg
35 -> TSsnTcktTls
13172 -> TNxPrtNego
65281 -> TRnInfo
et -> TRaw et
_ -> Left $ modNm ++ ": EType.decode"
data SName = SNHName BS.ByteString | SNRaw NType BS.ByteString deriving (Show, Eq)
instance B.Bytable SName where
encode (SNHName nm) = B.encode $ SNRaw NTHName nm
encode (SNRaw nt nm) = B.encode nt `BS.append` B.addLen w16 nm
decode = B.evalBytableM B.parse
instance B.Parsable SName where
parse = (\t n -> case t of NTHName -> SNHName n; _ -> SNRaw t n)
<$> B.take 1 <*> (B.take =<< B.take 2)
data NType = NTHName | NTRaw Word8 deriving (Show, Eq)
instance B.Bytable NType where
encode NTHName = BS.pack [0]
encode (NTRaw t) = BS.pack [t]
decode bs = case BS.unpack bs of
[t] -> Right $ case t of 0 -> NTHName; _ -> NTRaw t
_ -> Left $ modNm ++ ": NType.decode"
instance B.Bytable DH.Params where
encode (DH.Params p g) = BS.concat
[B.addLen w16 $ B.encode p, B.addLen w16 $ B.encode g]
decode = B.evalBytableM B.parse
instance B.Parsable DH.Params where
parse = DH.Params <$> (B.take =<< B.take 2) <*> (B.take =<< B.take 2)
instance B.Bytable DH.PublicNumber where
encode = B.addLen w16 . B.encode . \(DH.PublicNumber pn) -> pn
decode = B.evalBytableM B.parse
instance B.Parsable DH.PublicNumber where
parse = fromInteger <$> (B.take =<< B.take 2)
data ECType = ExpPrm | ExpCh2 | NmdCrv | CRaw Word8 deriving Show
instance B.Bytable ECType where
encode ExpPrm = BS.pack [1]
encode ExpCh2 = BS.pack [2]
encode NmdCrv = BS.pack [3]
encode (CRaw w) = BS.pack [w]
decode = B.evalBytableM B.parse
instance B.Parsable ECType where
parse = (\t -> case t of 1 -> ExpPrm; 2 -> ExpCh2; 3 -> NmdCrv; _ -> CRaw t)
<$> B.head
instance B.Bytable ECC.CurveName where
encode ECC.SEC_t163k1 = B.encode (1 :: Word16)
encode ECC.SEC_t163r1 = B.encode (2 :: Word16)
encode ECC.SEC_t163r2 = B.encode (3 :: Word16)
encode ECC.SEC_t193r1 = B.encode (4 :: Word16)
encode ECC.SEC_t193r2 = B.encode (5 :: Word16)
encode ECC.SEC_t233k1 = B.encode (6 :: Word16)
encode ECC.SEC_t233r1 = B.encode (7 :: Word16)
encode ECC.SEC_t239k1 = B.encode (8 :: Word16)
encode ECC.SEC_t283k1 = B.encode (9 :: Word16)
encode ECC.SEC_t283r1 = B.encode (10 :: Word16)
encode ECC.SEC_t409k1 = B.encode (11 :: Word16)
encode ECC.SEC_t409r1 = B.encode (12 :: Word16)
encode ECC.SEC_t571k1 = B.encode (13 :: Word16)
encode ECC.SEC_t571r1 = B.encode (14 :: Word16)
encode ECC.SEC_p160k1 = B.encode (15 :: Word16)
encode ECC.SEC_p160r1 = B.encode (16 :: Word16)
encode ECC.SEC_p160r2 = B.encode (17 :: Word16)
encode ECC.SEC_p192k1 = B.encode (18 :: Word16)
encode ECC.SEC_p192r1 = B.encode (19 :: Word16)
encode ECC.SEC_p224k1 = B.encode (20 :: Word16)
encode ECC.SEC_p224r1 = B.encode (21 :: Word16)
encode ECC.SEC_p256k1 = B.encode (22 :: Word16)
encode ECC.SEC_p256r1 = B.encode (23 :: Word16)
encode ECC.SEC_p384r1 = B.encode (24 :: Word16)
encode ECC.SEC_p521r1 = B.encode (25 :: Word16)
encode _ = error "Extension.encodeCN: not implemented"
decode bs = case BS.unpack bs of
[w1, w2] -> case fromIntegral w1 `shiftL` 8 .|. fromIntegral w2 of
(1 :: Word16) -> Right ECC.SEC_t163k1
(2 :: Word16) -> Right ECC.SEC_t163r1
(3 :: Word16) -> Right ECC.SEC_t163r2
(4 :: Word16) -> Right ECC.SEC_t193r1
(5 :: Word16) -> Right ECC.SEC_t193r2
(6 :: Word16) -> Right ECC.SEC_t233k1
(7 :: Word16) -> Right ECC.SEC_t233r1
(8 :: Word16) -> Right ECC.SEC_t239k1
(9 :: Word16) -> Right ECC.SEC_t283k1
(10 :: Word16) -> Right ECC.SEC_t283r1
(11 :: Word16) -> Right ECC.SEC_t409k1
(12 :: Word16) -> Right ECC.SEC_t409r1
(13 :: Word16) -> Right ECC.SEC_t571k1
(14 :: Word16) -> Right ECC.SEC_t571r1
(15 :: Word16) -> Right ECC.SEC_p160k1
(16 :: Word16) -> Right ECC.SEC_p160r1
(17 :: Word16) -> Right ECC.SEC_p160r2
(18 :: Word16) -> Right ECC.SEC_p192k1
(19 :: Word16) -> Right ECC.SEC_p192r1
(20 :: Word16) -> Right ECC.SEC_p224k1
(21 :: Word16) -> Right ECC.SEC_p224r1
(22 :: Word16) -> Right ECC.SEC_p256k1
(23 :: Word16) -> Right ECC.SEC_p256r1
(24 :: Word16) -> Right ECC.SEC_p384r1
(25 :: Word16) -> Right ECC.SEC_p521r1
n -> Left $ modNm ++ ": CurveName.decode: unknown crv: " ++
show n
_ -> Left $ modNm ++ ": CurveName.decode: bad format"
instance B.Parsable ECC.CurveName where parse = B.take 2
instance B.Bytable ECC.Curve where
encode c
| c == ECC.getCurveByName ECC.SEC_p256r1 =
B.encode NmdCrv `BS.append` B.encode ECC.SEC_p256r1
| c == ECC.getCurveByName ECC.SEC_p384r1 =
B.encode NmdCrv `BS.append` B.encode ECC.SEC_p384r1
| c == ECC.getCurveByName ECC.SEC_p521r1 =
B.encode NmdCrv `BS.append` B.encode ECC.SEC_p521r1
| otherwise = error $ modNm ++ ": ECC.Curve.encode: not implemented"
decode = B.evalBytableM B.parse
instance B.Parsable ECC.Curve where
parse = (ECC.getCurveByName <$>) $ B.parse >>= \t -> case t of
NmdCrv -> B.parse
_ -> error $ modNm ++ ": ECC.Curve.parse: not implemented"
data EPFrmt = EPFUncomp | EPFRaw Word8 deriving (Show, Eq)
instance B.Bytable EPFrmt where
encode EPFUncomp = BS.pack [0]
encode (EPFRaw f) = BS.pack [f]
decode bs = case BS.unpack bs of
[f] -> Right $ case f of 0 -> EPFUncomp; _ -> EPFRaw f
_ -> Left $ modNm ++ ": Bytable.decode"
instance B.Bytable ECC.Point where
encode (ECC.Point x y) = B.addLen w8 $
4 `BS.cons` pad 32 0 (B.encode x) `BS.append` pad 32 0 (B.encode y)
where pad n w s = BS.replicate (n BS.length s) w `BS.append` s
encode ECC.PointO = error $ modNm ++ ": EC.Point.encode"
decode = B.evalBytableM B.parse
instance B.Parsable ECC.Point where
parse = (B.take =<< B.take 1) >>= \bs -> case BS.uncons bs of
Just (4, xy) -> return $ let (x, y) = BS.splitAt 32 xy in ECC.Point
(either error id $ B.decode x)
(either error id $ B.decode y)
_ -> fail $ modNm ++ ": ECC.Point.parse"
isRnInfo :: Extension -> Bool
isRnInfo (ERnInfo _) = True
isRnInfo _ = False
emptyRnInfo :: Extension
emptyRnInfo = ERnInfo ""
w8 :: Word8; w8 = undefined
w16 :: Word16; w16 = undefined