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|
{-# OPTIONS_GHC -fno-warn-orphans #-}
{-# LANGUAGE OverloadedStrings #-}
module Serialization where
import Types
import Cost
import Raaz.Core.Encode
import qualified Crypto.Argon2 as Argon2
import qualified Data.ByteString as B
import qualified Data.ByteString.Char8 as B8
import Data.Monoid
import Data.Word
import Text.Read
instance Encodable ExpensiveHashTunable where
toByteString (UseArgon2 o _) = B.intercalate (B.singleton sepChar)
[ showb (Argon2.hashIterations o)
, showb (Argon2.hashMemory o)
, showb (Argon2.hashParallelism o)
, case Argon2.hashVariant o of
Argon2.Argon2i -> "argon2i"
Argon2.Argon2d -> "argon2d"
]
where
showb = B8.pack . show
fromByteString b = case B.split sepChar b of
(i:m:p:v:[]) -> do
o <- Argon2.HashOptions
<$> readb i
<*> readb m
<*> readb p
<*> case v of
"argon2i" -> return Argon2.Argon2i
"argon2d" -> return Argon2.Argon2d
_ -> Nothing
return $ UseArgon2 o unknownCost
_ -> Nothing
where
readb = readMaybe . B8.unpack
instance Encodable EncryptionTunable where
toByteString UseAES256 = "AES"
fromByteString "AES" = Just UseAES256
fromByteString _ = Nothing
instance Encodable DecryptionPuzzleTunable where
toByteString (KeyBlindingLeftSide _) = ">"
fromByteString ">" = Just (KeyBlindingLeftSide unknownCost)
fromByteString _ = Nothing
-- TODO
-- | An EncryptedSecretKey is serialized as first a md5sum of the rest
-- of the content, and then a SelfDescription EncryptedSecretKey,
-- and finally the
--instance Encodable EncryptedSecretKey where
-- toByteString (EncryptedSecretKey b _) = b
-- fromByteString b =
-- | A KeyIdent is serialized in the form "keytype name".
-- For example "gpg Joey Hess"
instance Encodable KeyIdent where
toByteString (KeyIdent (KeyType t) (Name n)) =
t <> B.singleton sepChar <> n
fromByteString b = case B.break (== sepChar) b of
(t, n)
| B.null n -> Nothing
| otherwise -> Just $
KeyIdent (KeyType t) (Name (B.drop 1 n))
-- | An ObjectIdent is serialied in the form "shardnum keytype name"
-- For example "1 gpg Joey Hess"
instance Encodable ObjectIdent where
toByteString (ObjectIdent (ShardNum n) keyident) =
B8.pack (show n) <> B.singleton sepChar <> toByteString keyident
fromByteString b = case B.break (== sepChar) b of
(ns, rest)
| B.null ns -> Nothing
| otherwise -> do
keyident <- fromByteString (B.drop 1 rest)
n <- readMaybe (B8.unpack ns)
return $ ObjectIdent (ShardNum n) keyident
sepChar :: Word8
sepChar = 32
|
