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{- Convenience wrapper around cryptohash.
- Falls back to SHA if it's not available.
-}
{-# LANGUAGE CPP #-}
module Utility.Hash (
sha1,
sha224,
sha256,
sha384,
sha512,
#ifdef WITH_CRYPTOHASH
skein256,
skein512,
#endif
prop_hashes_stable
) where
import qualified Data.ByteString.Lazy as L
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
#ifndef WITH_CRYPTOHASH
import Data.Digest.Pure.SHA
#else
import Crypto.Hash
sha1 :: L.ByteString -> Digest SHA1
sha1 = hashlazy
sha224 :: L.ByteString -> Digest SHA224
sha224 = hashlazy
sha256 :: L.ByteString -> Digest SHA256
sha256 = hashlazy
sha384 :: L.ByteString -> Digest SHA384
sha384 = hashlazy
sha512 :: L.ByteString -> Digest SHA512
sha512 = hashlazy
-- sha3 is not yet fully standardized
--sha3 :: L.ByteString -> Digest SHA3
--sha3 = hashlazy
skein256 :: L.ByteString -> Digest Skein256_256
skein256 = hashlazy
skein512 :: L.ByteString -> Digest Skein512_512
skein512 = hashlazy
#endif
{- Check that all the hashes continue to hash the same. -}
prop_hashes_stable :: Bool
prop_hashes_stable = all (\(hasher, result) -> hasher foo == result)
[ (show . sha1, "0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33")
, (show . sha224, "0808f64e60d58979fcb676c96ec938270dea42445aeefcd3a4e6f8db")
, (show . sha256, "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae")
, (show . sha384, "98c11ffdfdd540676b1a137cb1a22b2a70350c9a44171d6b1180c6be5cbb2ee3f79d532c8a1dd9ef2e8e08e752a3babb")
, (show . sha512, "f7fbba6e0636f890e56fbbf3283e524c6fa3204ae298382d624741d0dc6638326e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7")
#ifdef WITH_CRYPTOHASH
, (show . skein256, "a04efd9a0aeed6ede40fe5ce0d9361ae7b7d88b524aa19917b9315f1ecf00d33")
, (show . skein512, "fd8956898113510180aa4658e6c0ac85bd74fb47f4a4ba264a6b705d7a8e8526756e75aecda12cff4f1aca1a4c2830fbf57f458012a66b2b15a3dd7d251690a7")
#endif
]
where
foo = L.fromChunks [T.encodeUtf8 $ T.pack "foo"]
|
