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|
{- git-annex crypto types
-
- Copyright 2011-2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Types.Crypto (
Cipher(..),
StorableCipher(..),
EncryptedCipherVariant(..),
KeyIds(..),
cipherKeyIds,
Mac(..),
readMac,
showMac,
defaultMac,
calcMac,
) where
import Utility.Hash
import Utility.Gpg (KeyIds(..))
-- XXX ideally, this would be a locked memory region
data Cipher = Cipher String | MacOnlyCipher String
data StorableCipher
= EncryptedCipher String EncryptedCipherVariant KeyIds
| SharedCipher String
| SharedPubKeyCipher String KeyIds
deriving (Ord, Eq)
data EncryptedCipherVariant = Hybrid | PubKey
deriving (Ord, Eq)
cipherKeyIds :: StorableCipher -> Maybe KeyIds
cipherKeyIds (EncryptedCipher _ _ ks) = Just ks
cipherKeyIds (SharedPubKeyCipher _ ks) = Just ks
cipherKeyIds (SharedCipher _) = Nothing
defaultMac :: Mac
defaultMac = HmacSha1
-- MAC algorithms are shown as follows in the file names.
showMac :: Mac -> String
showMac HmacSha1 = "HMACSHA1"
showMac HmacSha224 = "HMACSHA224"
showMac HmacSha256 = "HMACSHA256"
showMac HmacSha384 = "HMACSHA384"
showMac HmacSha512 = "HMACSHA512"
-- Read the MAC algorithm from the remote config.
readMac :: String -> Maybe Mac
readMac "HMACSHA1" = Just HmacSha1
readMac "HMACSHA224" = Just HmacSha224
readMac "HMACSHA256" = Just HmacSha256
readMac "HMACSHA384" = Just HmacSha384
readMac "HMACSHA512" = Just HmacSha512
readMac _ = Nothing
|
