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[Camellia] More refactoring

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This commit is contained in:
Vincent Hanquez 2015-04-09 16:52:21 +01:00
parent c00d7b9eca
commit 7a85896359
1 changed files with 6 additions and 12 deletions
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18
Crypto/Cipher/Camellia/Primitive.hs
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@ -56,12 +56,6 @@ w8tow64 b = (sh t1 56 .|. sh t2 48 .|. sh t3 40 .|. sh t4 32 .|. sh t5 24 .|. sh
t8 = B.unsafeIndex b 7
sh i r = (fromIntegral i) `shiftL` r
w64tow32 :: Word64 -> (Word32, Word32)
w64tow32 w = (fromIntegral (w `shiftR` 32), fromIntegral (w .&. 0xffffffff))
w32tow64 :: (Word32, Word32) -> Word64
w32tow64 (x1, x2) = ((fromIntegral x1) `shiftL` 32) .|. (fromIntegral x2)
sbox :: Vector Word8
sbox = fromList
[112,130, 44,236,179, 39,192,229,228,133, 87, 53,234, 12,174, 65
@ -200,19 +194,19 @@ feistel fin sk =
fl :: Word64 -> Word64 -> Word64
fl fin sk =
let (x1, x2) = w64tow32 fin in
let (k1, k2) = w64tow32 sk in
let (x1, x2) = w64to32 fin in
let (k1, k2) = w64to32 sk in
let y2 = x2 `xor` ((x1 .&. k1) `rotateL` 1) in
let y1 = x1 `xor` (y2 .|. k2) in
w32tow64 (y1, y2)
w32to64 (y1, y2)
flinv :: Word64 -> Word64 -> Word64
flinv fin sk =
let (y1, y2) = w64tow32 fin in
let (k1, k2) = w64tow32 sk in
let (y1, y2) = w64to32 fin in
let (k1, k2) = w64to32 sk in
let x1 = y1 `xor` (y2 .|. k2) in
let x2 = y2 `xor` ((x1 .&. k1) `rotateL` 1) in
w32tow64 (x1, x2)
w32to64 (x1, x2)
{- in decrypt mode 0->17 1->16 ... -}
getKeyK :: Mode -> Camellia -> Int -> Word64