diff options
Diffstat (limited to 'Backend/Hash.hs')
| -rw-r--r-- | Backend/Hash.hs | 65 |
1 files changed, 46 insertions, 19 deletions
diff --git a/Backend/Hash.hs b/Backend/Hash.hs index ed9553b7c..f14af7b3a 100644 --- a/Backend/Hash.hs +++ b/Backend/Hash.hs @@ -1,10 +1,12 @@ -{- git-tnnex hashing backends +{- git-annex hashing backends - - - Copyright 2011-2013 Joey Hess <id@joeyh.name> + - Copyright 2011-2015 Joey Hess <id@joeyh.name> - - Licensed under the GNU GPL version 3 or higher. -} +{-# LANGUAGE CPP #-} + module Backend.Hash ( backends, testKeyBackend, @@ -22,21 +24,30 @@ import qualified Build.SysConfig as SysConfig import qualified Data.ByteString.Lazy as L import Data.Char -data Hash = SHAHash HashSize | SkeinHash HashSize | MD5Hash +data Hash + = MD5Hash + | SHA1Hash + | SHA2Hash HashSize + | SHA3Hash HashSize + | SkeinHash HashSize type HashSize = Int {- Order is slightly significant; want SHA256 first, and more general - sizes earlier. -} hashes :: [Hash] hashes = concat - [ map SHAHash [256, 1, 512, 224, 384] + [ map SHA2Hash [256, 512, 224, 384] +#ifdef WITH_CRYPTONITE + , map SHA3Hash [256, 512, 224, 384] +#endif , map SkeinHash [256, 512] + , [SHA1Hash] , [MD5Hash] ] {- The SHA256E backend is the default, so genBackendE comes first. -} backends :: [Backend] -backends = map genBackendE hashes ++ map genBackend hashes +backends = concatMap (\h -> [genBackendE h, genBackend h]) hashes genBackend :: Hash -> Backend genBackend hash = Backend @@ -55,9 +66,11 @@ genBackendE hash = (genBackend hash) } hashName :: Hash -> String -hashName (SHAHash size) = "SHA" ++ show size -hashName (SkeinHash size) = "SKEIN" ++ show size hashName MD5Hash = "MD5" +hashName SHA1Hash = "SHA1" +hashName (SHA2Hash size) = "SHA" ++ show size +hashName (SHA3Hash size) = "SHA3_" ++ show size +hashName (SkeinHash size) = "SKEIN" ++ show size hashNameE :: Hash -> String hashNameE hash = hashName hash ++ "E" @@ -153,7 +166,15 @@ trivialMigrate oldkey newbackend afile hashFile :: Hash -> FilePath -> Integer -> Annex String hashFile hash file filesize = go hash where - go (SHAHash hashsize) = case shaHasher hashsize filesize of + go MD5Hash = use md5Hasher + go SHA1Hash = usehasher 1 + go (SHA2Hash hashsize) = usehasher hashsize + go (SHA3Hash hashsize) = use (sha3Hasher hashsize) + go (SkeinHash hashsize) = use (skeinHasher hashsize) + + use hasher = liftIO $ hasher <$> L.readFile file + + usehasher hashsize = case shaHasher hashsize filesize of Left sha -> use sha Right (external, internal) -> do v <- liftIO $ externalSHA external hashsize file @@ -164,19 +185,15 @@ hashFile hash file filesize = go hash -- fall back to internal since -- external command failed use internal - go (SkeinHash hashsize) = use (skeinHasher hashsize) - go MD5Hash = use md5Hasher - - use hasher = liftIO $ hasher <$> L.readFile file shaHasher :: HashSize -> Integer -> Either (L.ByteString -> String) (String, L.ByteString -> String) shaHasher hashsize filesize | hashsize == 1 = use SysConfig.sha1 sha1 - | hashsize == 256 = use SysConfig.sha256 sha256 - | hashsize == 224 = use SysConfig.sha224 sha224 - | hashsize == 384 = use SysConfig.sha384 sha384 - | hashsize == 512 = use SysConfig.sha512 sha512 - | otherwise = error $ "unsupported sha size " ++ show hashsize + | hashsize == 256 = use SysConfig.sha256 sha2_256 + | hashsize == 224 = use SysConfig.sha224 sha2_224 + | hashsize == 384 = use SysConfig.sha384 sha2_384 + | hashsize == 512 = use SysConfig.sha512 sha2_512 + | otherwise = error $ "unsupported SHA size " ++ show hashsize where use Nothing hasher = Left $ usehasher hasher use (Just c) hasher @@ -189,11 +206,21 @@ shaHasher hashsize filesize | otherwise = Right (c, usehasher hasher) usehasher hasher = show . hasher +sha3Hasher :: HashSize -> (L.ByteString -> String) +sha3Hasher hashsize +#ifdef WITH_CRYPTONITE + | hashsize == 256 = show . sha3_256 + | hashsize == 224 = show . sha3_224 + | hashsize == 384 = show . sha3_384 + | hashsize == 512 = show . sha3_512 +#endif + | otherwise = error $ "unsupported SHA3 size " ++ show hashsize + skeinHasher :: HashSize -> (L.ByteString -> String) skeinHasher hashsize | hashsize == 256 = show . skein256 | hashsize == 512 = show . skein512 - | otherwise = error $ "unsupported skein size " ++ show hashsize + | otherwise = error $ "unsupported SKEIN size " ++ show hashsize md5Hasher :: L.ByteString -> String md5Hasher = show . md5 @@ -207,7 +234,7 @@ md5Hasher = show . md5 -} testKeyBackend :: Backend testKeyBackend = - let b = genBackendE (SHAHash 256) + let b = genBackendE (SHA2Hash 256) in b { getKey = (fmap addE) <$$> getKey b } where addE k = k { keyName = keyName k ++ longext } |