diff options
Diffstat (limited to 'Utility/Hash.hs')
| -rw-r--r-- | Utility/Hash.hs | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/Utility/Hash.hs b/Utility/Hash.hs index 8b25998ae..cecc6af3e 100644 --- a/Utility/Hash.hs +++ b/Utility/Hash.hs @@ -1,13 +1,30 @@ {- Convenience wrapper around cryptohash. - - - - The resulting Digests can be shown to get a canonical hash encoding. -} + - Falls back to SHA if it's not available. + -} -module Utility.Hash where +{-# LANGUAGE CPP #-} + +module Utility.Hash ( + sha1, + sha224, + sha256, + sha384, + sha512, +#ifdef WITH_CRYPTOHASH + skein256, + skein512, +#endif + prop_hashes_stable +) where -import Crypto.Hash import qualified Data.ByteString.Lazy as L import qualified Data.ByteString.Char8 as C8 +#ifndef WITH_CRYPTOHASH +import Data.Digest.Pure.SHA +#else +import Crypto.Hash + sha1 :: L.ByteString -> Digest SHA1 sha1 = hashlazy @@ -33,6 +50,8 @@ 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) @@ -41,8 +60,10 @@ prop_hashes_stable = all (\(hasher, result) -> hasher foo == result) , (show . sha256, "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae") , (show . sha384, "98c11ffdfdd540676b1a137cb1a22b2a70350c9a44171d6b1180c6be5cbb2ee3f79d532c8a1dd9ef2e8e08e752a3babb") , (show . sha512, "f7fbba6e0636f890e56fbbf3283e524c6fa3204ae298382d624741d0dc6638326e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7") +#ifdef WITH_CRYPTOHASH , (show . skein256, "a04efd9a0aeed6ede40fe5ce0d9361ae7b7d88b524aa19917b9315f1ecf00d33") , (show . skein512, "fd8956898113510180aa4658e6c0ac85bd74fb47f4a4ba264a6b705d7a8e8526756e75aecda12cff4f1aca1a4c2830fbf57f458012a66b2b15a3dd7d251690a7") +#endif ] where foo = L.fromChunks [C8.pack "foo"] |