blob: f2b8d75d8227bd9097c84e3d824f07b4ec565714 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
{-# LANGUAGE FlexibleInstances #-}
module Hash where
import Types
import qualified Data.ByteString as B
import qualified Data.ByteString.Char8 as C8
import qualified Crypto.Hash as H
class Hashable a where
hash :: a -> HashPointer
instance Hashable B.ByteString where
-- Encodes the SHA256 using base16 format
hash = HashPointer SHA256 . Val . C8.pack . show . sha256
instance Hashable Val where
hash (Val v) = hash v
sha256 :: B.ByteString -> H.Digest H.SHA256
sha256 = H.hash
-- | Hash the concacenation of the hashes.
instance Hashable [HashPointer] where
hash = hash . B.concat . map (val . hashValue)
instance Hashable a => Hashable (Activity a) where
hash (Activity a (Just p) s) = hash [hash a, p, hash s]
hash (Activity a Nothing s) = hash [hash a, hash s]
instance Hashable Entered where
hash v = hash [hash (enteredData v), hash (echoData v)]
instance Hashable Seen where
hash v = hash [hash (seenData v)]
instance Hashable Signature where
hash (Signature s) = hash s
|
