-- |
-- Module      : Data.X509.PublicKey
-- License     : BSD-style
-- Maintainer  : Vincent Hanquez <vincent@snarc.org>
-- Stability   : experimental
-- Portability : unknown
--
-- Private key handling in X.509 infrastructure
--
module Data.X509.PrivateKey
    ( PrivKey(..)
    , PrivKeyEC(..)
    , privkeyToAlg
    ) where

import Data.X509.AlgorithmIdentifier
import Data.X509.PublicKey (SerializedPoint(..))
import qualified Crypto.PubKey.RSA as RSA
import qualified Crypto.PubKey.DSA as DSA
import qualified Crypto.PubKey.ECC.Types as ECC

-- | Elliptic Curve Private Key
--
-- TODO: missing support for binary curve.
data PrivKeyEC =
      PrivKeyEC_Prime
        { privkeyEC_priv      :: Integer
        , privkeyEC_a         :: Integer
        , privkeyEC_b         :: Integer
        , privkeyEC_prime     :: Integer
        , privkeyEC_generator :: SerializedPoint
        , privkeyEC_order     :: Integer
        , privkeyEC_cofactor  :: Integer
        , privkeyEC_seed      :: Integer
        }
    | PrivKeyEC_Named
        { privkeyEC_name      :: ECC.CurveName
        , privkeyEC_priv      :: Integer
        }
    deriving (Show,Eq)

-- | Private key types known and used in X.509
data PrivKey =
      PrivKeyRSA RSA.PrivateKey -- ^ RSA private key
    | PrivKeyDSA DSA.PrivateKey -- ^ DSA private key
    | PrivKeyEC  PrivKeyEC      -- ^ EC private key
    deriving (Show,Eq)

-- | Convert a Private key to the Public Key Algorithm type
privkeyToAlg :: PrivKey -> PubKeyALG
privkeyToAlg (PrivKeyRSA _)         = PubKeyALG_RSA
privkeyToAlg (PrivKeyDSA _)         = PubKeyALG_DSA
privkeyToAlg (PrivKeyEC _)          = PubKeyALG_EC