1-- |
2-- Module      : Crypto.Hash.Blake2s
3-- License     : BSD-style
4-- Maintainer  : Vincent Hanquez <vincent@snarc.org>
5-- Stability   : experimental
6-- Portability : unknown
7--
8-- Module containing the binding functions to work with the
9-- Blake2s cryptographic hash.
10--
11{-# LANGUAGE ForeignFunctionInterface #-}
12{-# LANGUAGE DeriveDataTypeable #-}
13{-# LANGUAGE DataKinds #-}
14{-# LANGUAGE TypeFamilies #-}
15module Crypto.Hash.Blake2s
16    (  Blake2s_160 (..), Blake2s_224 (..), Blake2s_256 (..)
17    ) where
18
19import           Crypto.Hash.Types
20import           Foreign.Ptr (Ptr)
21import           Data.Data
22import           Data.Word (Word8, Word32)
23
24
25-- | Blake2s (160 bits) cryptographic hash algorithm
26data Blake2s_160 = Blake2s_160
27    deriving (Show,Data)
28
29instance HashAlgorithm Blake2s_160 where
30    type HashBlockSize           Blake2s_160 = 64
31    type HashDigestSize          Blake2s_160 = 20
32    type HashInternalContextSize Blake2s_160 = 136
33    hashBlockSize  _          = 64
34    hashDigestSize _          = 20
35    hashInternalContextSize _ = 136
36    hashInternalInit p        = c_blake2s_init p 160
37    hashInternalUpdate        = c_blake2s_update
38    hashInternalFinalize p    = c_blake2s_finalize p 160
39
40-- | Blake2s (224 bits) cryptographic hash algorithm
41data Blake2s_224 = Blake2s_224
42    deriving (Show,Data)
43
44instance HashAlgorithm Blake2s_224 where
45    type HashBlockSize           Blake2s_224 = 64
46    type HashDigestSize          Blake2s_224 = 28
47    type HashInternalContextSize Blake2s_224 = 136
48    hashBlockSize  _          = 64
49    hashDigestSize _          = 28
50    hashInternalContextSize _ = 136
51    hashInternalInit p        = c_blake2s_init p 224
52    hashInternalUpdate        = c_blake2s_update
53    hashInternalFinalize p    = c_blake2s_finalize p 224
54
55-- | Blake2s (256 bits) cryptographic hash algorithm
56data Blake2s_256 = Blake2s_256
57    deriving (Show,Data)
58
59instance HashAlgorithm Blake2s_256 where
60    type HashBlockSize           Blake2s_256 = 64
61    type HashDigestSize          Blake2s_256 = 32
62    type HashInternalContextSize Blake2s_256 = 136
63    hashBlockSize  _          = 64
64    hashDigestSize _          = 32
65    hashInternalContextSize _ = 136
66    hashInternalInit p        = c_blake2s_init p 256
67    hashInternalUpdate        = c_blake2s_update
68    hashInternalFinalize p    = c_blake2s_finalize p 256
69
70
71foreign import ccall unsafe "cryptonite_blake2s_init"
72    c_blake2s_init :: Ptr (Context a) -> Word32 -> IO ()
73
74foreign import ccall "cryptonite_blake2s_update"
75    c_blake2s_update :: Ptr (Context a) -> Ptr Word8 -> Word32 -> IO ()
76
77foreign import ccall unsafe "cryptonite_blake2s_finalize"
78    c_blake2s_finalize :: Ptr (Context a) -> Word32 -> Ptr (Digest a) -> IO ()
79