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implement isCryptographicallySecureKey for VURL

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Considerable difficulty to work around an import cycle. Had to move the
list of backends (except for VURL) to Backend.Variety to VURL could use
it.

Sponsored-by: Kevin Mueller on Patreon
This commit is contained in:
Joey Hess 2024-02-29 17:21:29 -04:00
parent e7b7ea78af
commit cc17ac423b
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GPG key ID: DB12DB0FF05F8F38
16 changed files with 143 additions and 64 deletions
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37
Backend.hs
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@ -18,10 +18,12 @@ module Backend (
lookupBuiltinBackendVariety,
maybeLookupBackendVariety,
isStableKey,
isCryptographicallySecureKey,
isCryptographicallySecure,
isCryptographicallySecure',
) where
import qualified Data.Map as M
import Annex.Common
import qualified Annex
import Annex.CheckAttr
@ -29,18 +31,12 @@ import Types.Key
import Types.KeySource
import qualified Types.Backend as B
import Utility.Metered
-- When adding a new backend, import it here and add it to the builtinList.
import qualified Backend.Hash
import qualified Backend.WORM
import qualified Backend.URL
import qualified Backend.External
import qualified Data.Map as M
import Backend.Variety
import qualified Backend.VURL
{- Built-in backends. Does not include externals. -}
builtinList :: [Backend]
builtinList = Backend.Hash.backends ++ Backend.WORM.backends ++ Backend.URL.backends
builtinList = regularBackendList ++ Backend.VURL.backends
{- The default hashing backend. This must use a cryptographically secure
- hash. -}
@ -107,25 +103,24 @@ lookupBuiltinBackendVariety :: KeyVariety -> Backend
lookupBuiltinBackendVariety v = fromMaybe (giveup (unknownBackendVarietyMessage v)) $
maybeLookupBuiltinBackendVariety v
maybeLookupBackendVariety :: KeyVariety -> Annex (Maybe Backend)
maybeLookupBackendVariety (ExternalKey s hasext) =
Just <$> Backend.External.makeBackend s hasext
maybeLookupBackendVariety v =
pure $ M.lookup v varietyMap
maybeLookupBuiltinBackendVariety :: KeyVariety -> Maybe Backend
maybeLookupBuiltinBackendVariety v = M.lookup v varietyMap
maybeLookupBackendVariety :: KeyVariety -> Annex (Maybe Backend)
maybeLookupBackendVariety v = maybeLookupBackendVarietyMap v varietyMap
varietyMap :: M.Map KeyVariety Backend
varietyMap = M.fromList $ zip (map B.backendVariety builtinList) builtinList
varietyMap = makeVarietyMap builtinList
isStableKey :: Key -> Annex Bool
isStableKey k = maybe False (`B.isStableKey` k)
<$> maybeLookupBackendVariety (fromKey keyVariety k)
isCryptographicallySecure :: Key -> Annex Bool
isCryptographicallySecure k = maybe (pure False) isCryptographicallySecure'
isCryptographicallySecureKey :: Key -> Annex Bool
isCryptographicallySecureKey k = maybe
(pure False)
(\b -> B.isCryptographicallySecureKey b k)
=<< maybeLookupBackendVariety (fromKey keyVariety k)
isCryptographicallySecure' :: Backend -> Annex Bool
isCryptographicallySecure' = B.isCryptographicallySecure
isCryptographicallySecure :: Backend -> Bool
isCryptographicallySecure = B.isCryptographicallySecure