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module Shard where
import Types
import Serialization
import Cost
import qualified Crypto.SecretSharing as SS
import qualified Data.ByteString.Lazy as BL
import Raaz.Core.Encode (toByteString, fromByteString)
import Data.Binary
genShards :: EncryptedSecretKey -> ShardParams -> IO [StorableObject]
genShards esk ps =
map (StorableObject . encode) <$> SS.encode
(neededObjects ps)
(totalObjects ps)
(BL.fromStrict (toByteString esk))
-- Throws AssertionFailed if the number of shares is too small.
combineShards :: [StorableObject] -> Maybe EncryptedSecretKey
combineShards = fromByteString . BL.toStrict . SS.decode . map conv
where
conv = decode . fromStorableObject
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