diff options
Diffstat (limited to 'Types/Key.hs')
| -rw-r--r-- | Types/Key.hs | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/Types/Key.hs b/Types/Key.hs index 0615adfe4..27d56dfd9 100644 --- a/Types/Key.hs +++ b/Types/Key.hs @@ -7,13 +7,15 @@ module Types.Key where +import Utility.PartialPrelude + import System.Posix.Types {- A Key has a unique name, which is derived from a particular backend, - and may contain other optional metadata. -} data Key = Key { keyName :: String - , keyBackendName :: String + , keyVariety :: KeyVariety , keySize :: Maybe Integer , keyMtime :: Maybe EpochTime , keyChunkSize :: Maybe Integer @@ -22,3 +24,85 @@ data Key = Key {- A filename may be associated with a Key. -} type AssociatedFile = Maybe FilePath + +{- There are several different varieties of keys. -} +data KeyVariety + = SHA2Key HashSize HasExt + | SHA3Key HashSize HasExt + | SKEINKey HashSize HasExt + | SHA1Key HasExt + | MD5Key HasExt + | WORMKey + | URLKey + -- Some repositories may contain keys of other varieties, + -- which can still be processed to some extent. + | OtherKey String + deriving (Eq, Ord, Read, Show) + +{- Some varieties of keys may contain an extension at the end of the + - keyName -} +newtype HasExt = HasExt Bool + deriving (Eq, Ord, Read, Show) + +newtype HashSize = HashSize Int + deriving (Eq, Ord, Read, Show) + +hasExt :: KeyVariety -> Bool +hasExt (SHA2Key _ (HasExt b)) = b +hasExt (SHA3Key _ (HasExt b)) = b +hasExt (SKEINKey _ (HasExt b)) = b +hasExt (SHA1Key (HasExt b)) = b +hasExt (MD5Key (HasExt b)) = b +hasExt WORMKey = False +hasExt URLKey = False +hasExt (OtherKey s) = end s == "E" + +sameExceptExt :: KeyVariety -> KeyVariety -> Bool +sameExceptExt (SHA2Key sz1 _) (SHA2Key sz2 _) = sz1 == sz2 +sameExceptExt (SHA3Key sz1 _) (SHA3Key sz2 _) = sz1 == sz2 +sameExceptExt (SKEINKey sz1 _) (SKEINKey sz2 _) = sz1 == sz2 +sameExceptExt (SHA1Key _) (SHA1Key _) = True +sameExceptExt (MD5Key _) (MD5Key _) = True +sameExceptExt _ _ = False + +formatKeyVariety :: KeyVariety -> String +formatKeyVariety v = case v of + SHA2Key sz e -> adde e (addsz sz "SHA") + SHA3Key sz e -> adde e (addsz sz "SHA3_") + SKEINKey sz e -> adde e (addsz sz "SKEIN") + SHA1Key e -> adde e "SHA1" + MD5Key e -> adde e "MD5" + WORMKey -> "WORM" + URLKey -> "URL" + OtherKey s -> s + where + adde (HasExt False) s = s + adde (HasExt True) s = s ++ "E" + addsz (HashSize n) s = s ++ show n + +parseKeyVariety :: String -> KeyVariety +parseKeyVariety "SHA256" = SHA2Key (HashSize 256) (HasExt False) +parseKeyVariety "SHA256E" = SHA2Key (HashSize 256) (HasExt True) +parseKeyVariety "SHA512" = SHA2Key (HashSize 512) (HasExt False) +parseKeyVariety "SHA512E" = SHA2Key (HashSize 512) (HasExt True) +parseKeyVariety "SHA224" = SHA2Key (HashSize 224) (HasExt False) +parseKeyVariety "SHA224E" = SHA2Key (HashSize 224) (HasExt True) +parseKeyVariety "SHA384" = SHA2Key (HashSize 384) (HasExt False) +parseKeyVariety "SHA384E" = SHA2Key (HashSize 384) (HasExt True) +parseKeyVariety "SHA3_512" = SHA3Key (HashSize 512) (HasExt False) +parseKeyVariety "SHA3_512E" = SHA3Key (HashSize 512) (HasExt True) +parseKeyVariety "SHA3_384" = SHA3Key (HashSize 384) (HasExt False) +parseKeyVariety "SHA3_384E" = SHA3Key (HashSize 384) (HasExt True) +parseKeyVariety "SHA3_256" = SHA3Key (HashSize 256) (HasExt False) +parseKeyVariety "SHA3_256E" = SHA3Key (HashSize 256) (HasExt True) +parseKeyVariety "SHA3_224" = SHA3Key (HashSize 224) (HasExt False) +parseKeyVariety "SHA3_224E" = SHA3Key (HashSize 224) (HasExt True) +parseKeyVariety "SKEIN512" = SKEINKey (HashSize 512) (HasExt False) +parseKeyVariety "SKEIN512E" = SKEINKey (HashSize 512) (HasExt True) +parseKeyVariety "SKEIN256" = SKEINKey (HashSize 256) (HasExt False) +parseKeyVariety "SKEIN256E" = SKEINKey (HashSize 256) (HasExt True) +parseKeyVariety "SHA1" = SHA1Key (HasExt False) +parseKeyVariety "MD5" = MD5Key (HasExt False) +parseKeyVariety "WORM" = WORMKey +parseKeyVariety "URL" = URLKey +parseKeyVariety s = OtherKey s |