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{-# LANGUAGE OverloadedStrings, GeneralizedNewtypeDeriving, MultiParamTypeClasses, FlexibleInstances #-}
module Types where
import Cost
import Entropy
import qualified Data.ByteString as B
import qualified Data.ByteString.Char8 as B8
import qualified Data.ByteString.Lazy as BL
import Raaz.Core.Encode
import Data.Monoid
import Data.Word
import Data.Time.Clock
import Data.String
import Text.Read
-- | keysafe stores secret keys.
newtype SecretKey = SecretKey B.ByteString
-- | The secret key, encrypted with a password.
data EncryptedSecretKey = EncryptedSecretKey B.ByteString (CostCalc BruteForceOp UnknownPassword)
instance Bruteforceable EncryptedSecretKey UnknownPassword where
getBruteCostCalc (EncryptedSecretKey _ cc) = cc
-- | An object that can be stored on a keysafe server.
data StorableObject = StorableObject BL.ByteString
-- | A password used to encrypt a key stored in keysafe.
newtype Password = Password B.ByteString
deriving (IsString)
-- | Naive calculation of the entropy of a password.
-- Does not take common passwords and password generation patterns into
-- account, so this is an overestimation of how hard a password
-- is to crack.
passwordEntropy :: Password -> Entropy UnknownPassword
passwordEntropy (Password p) = Entropy $ floor $ totalEntropy p
-- | A name associated with a key stored in keysafe.
newtype Name = Name B.ByteString
deriving (Show)
-- | The type of the key that is stored in keysafe.
newtype KeyType = KeyType B.ByteString
deriving (Show)
gpgKey :: KeyType
gpgKey = KeyType "gpg"
-- | Enough information to uniquely identify a key stored in keysafe.
data KeyIdent = KeyIdent KeyType Name
deriving (Show)
-- | 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 identSepChar <> n
fromByteString b = case B.break (== identSepChar) b of
(t, n)
| B.null n -> Nothing
| otherwise -> Just $
KeyIdent (KeyType t) (Name (B.drop 1 n))
identSepChar :: Word8
identSepChar = 32
newtype ShardNum = ShardNum Int
deriving (Show)
-- | Enough information to uniquely identify an object stored on a keysafe
-- server for a key.
data ObjectIdent = ObjectIdent ShardNum KeyIdent
deriving (Show)
-- | 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 identSepChar <> toByteString keyident
fromByteString b = case B.break (== identSepChar) 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
data Benchmark t = Benchmark { expectedBenchmark :: t, actualBenchmark :: t }
deriving (Show)
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