Added support for SHA3 hashed keys (in 8 varieties), when git-annex is built using the cryptonite library.

While cryptohash has SHA3 support, it has not been updated for the final
version of the spec. Note that cryptonite has not been ported to all arches
that cryptohash builds on yet.

Utility/Hash.hs

@@ -1,11 +1,23 @@
-{- Convenience wrapper around cryptohash. -}
+{- Convenience wrapper around cryptohash/cryptonite.
+ -
+ - SHA3 hashes are currently only enabled when using cryptonite,
+ - because of https://github.com/vincenthz/hs-cryptohash/issues/36
+ -}
+
+{-# LANGUAGE CPP #-}
 
 module Utility.Hash (
 	sha1,
-	sha224,
-	sha256,
-	sha384,
-	sha512,
+	sha2_224,
+	sha2_256,
+	sha2_384,
+	sha2_512,
+#ifdef WITH_CRYPTONITE
+	sha3_224,
+	sha3_256,
+	sha3_384,
+	sha3_512,
+#endif
 	skein256,
 	skein512,
 	md5,
@@ -20,25 +32,38 @@ import qualified Data.Text as T
 import qualified Data.Text.Encoding as T
 import qualified Data.ByteString as S
 import Crypto.Hash
+#ifdef WITH_CRYPTONITE
+import Crypto.MAC.HMAC
+#endif
 
 sha1 :: L.ByteString -> Digest SHA1
 sha1 = hashlazy
 
-sha224 :: L.ByteString -> Digest SHA224
-sha224 = hashlazy
+sha2_224 :: L.ByteString -> Digest SHA224
+sha2_224 = hashlazy
 
-sha256 :: L.ByteString -> Digest SHA256
-sha256 = hashlazy
+sha2_256 :: L.ByteString -> Digest SHA256
+sha2_256 = hashlazy
 
-sha384 :: L.ByteString -> Digest SHA384
-sha384 = hashlazy
+sha2_384 :: L.ByteString -> Digest SHA384
+sha2_384 = hashlazy
 
-sha512 :: L.ByteString -> Digest SHA512
-sha512 = hashlazy
+sha2_512 :: L.ByteString -> Digest SHA512
+sha2_512 = hashlazy
 
--- sha3 is not yet fully standardized
---sha3 :: L.ByteString -> Digest SHA3
---sha3 = hashlazy
+#ifdef WITH_CRYPTONITE
+sha3_224 :: L.ByteString -> Digest SHA3_224
+sha3_224 = hashlazy
+
+sha3_256 :: L.ByteString -> Digest SHA3_256
+sha3_256 = hashlazy
+
+sha3_384 :: L.ByteString -> Digest SHA3_384
+sha3_384 = hashlazy
+
+sha3_512 :: L.ByteString -> Digest SHA3_512
+sha3_512 = hashlazy
+#endif
 
 skein256 :: L.ByteString -> Digest Skein256_256
 skein256 = hashlazy
@@ -53,12 +78,18 @@ md5 = hashlazy
 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")
+	, (show . sha2_224, "0808f64e60d58979fcb676c96ec938270dea42445aeefcd3a4e6f8db")
+	, (show . sha2_256, "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae")
+	, (show . sha2_384, "98c11ffdfdd540676b1a137cb1a22b2a70350c9a44171d6b1180c6be5cbb2ee3f79d532c8a1dd9ef2e8e08e752a3babb")
+	, (show . sha2_512, "f7fbba6e0636f890e56fbbf3283e524c6fa3204ae298382d624741d0dc6638326e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7")
 	, (show . skein256, "a04efd9a0aeed6ede40fe5ce0d9361ae7b7d88b524aa19917b9315f1ecf00d33")
 	, (show . skein512, "fd8956898113510180aa4658e6c0ac85bd74fb47f4a4ba264a6b705d7a8e8526756e75aecda12cff4f1aca1a4c2830fbf57f458012a66b2b15a3dd7d251690a7")
+#ifdef WITH_CRYPTONITE
+	, (show . sha3_224, "f4f6779e153c391bbd29c95e72b0708e39d9166c7cea51d1f10ef58a")
+	, (show . sha3_256, "76d3bc41c9f588f7fcd0d5bf4718f8f84b1c41b20882703100b9eb9413807c01")
+	, (show . sha3_384, "665551928d13b7d84ee02734502b018d896a0fb87eed5adb4c87ba91bbd6489410e11b0fbcc06ed7d0ebad559e5d3bb5")
+	, (show . sha3_512, "4bca2b137edc580fe50a88983ef860ebaca36c857b1f492839d6d7392452a63c82cbebc68e3b70a2a1480b4bb5d437a7cba6ecf9d89f9ff3ccd14cd6146ea7e7")
+#endif
 	, (show . md5, "acbd18db4cc2f85cedef654fccc4a4d8")
 	]
   where
@@ -83,7 +114,10 @@ calcMac mac = case mac of
 	HmacSha384 -> use SHA384
 	HmacSha512 -> use SHA512
   where
-	use alg k m = show (hmacGetDigest (hmacAlg alg k m))
+	use alg k m = show (hmacGetDigest (hmacWitnessAlg alg k m))
+
+	hmacWitnessAlg :: HashAlgorithm a => a -> S.ByteString -> S.ByteString -> HMAC a
+	hmacWitnessAlg _ = hmac
 
 -- Check that all the MACs continue to produce the same.
 prop_mac_stable :: Bool