{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE ForeignFunctionInterface #-}
module Crypto.System.CPU
( ProcessorOption (..)
, processorOptions
) where
import Data.Data
import Data.List (findIndices)
#ifdef SUPPORT_RDRAND
import Data.Maybe (isJust)
#endif
import Data.Word (Word8)
import Foreign.Ptr
import Foreign.Storable
import Crypto.Internal.Compat
#ifdef SUPPORT_RDRAND
import Crypto.Random.Entropy.RDRand
import Crypto.Random.Entropy.Source
#endif
data ProcessorOption
= AESNI
| PCLMUL
| RDRAND
deriving (Int -> ProcessorOption -> ShowS
[ProcessorOption] -> ShowS
ProcessorOption -> String
forall a.
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showList :: [ProcessorOption] -> ShowS
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show :: ProcessorOption -> String
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showsPrec :: Int -> ProcessorOption -> ShowS
$cshowsPrec :: Int -> ProcessorOption -> ShowS
Show,ProcessorOption -> ProcessorOption -> Bool
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/= :: ProcessorOption -> ProcessorOption -> Bool
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ProcessorOption -> Int
ProcessorOption -> [ProcessorOption]
ProcessorOption -> ProcessorOption
ProcessorOption -> ProcessorOption -> [ProcessorOption]
ProcessorOption
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enumFrom :: ProcessorOption -> [ProcessorOption]
$cenumFrom :: ProcessorOption -> [ProcessorOption]
fromEnum :: ProcessorOption -> Int
$cfromEnum :: ProcessorOption -> Int
toEnum :: Int -> ProcessorOption
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pred :: ProcessorOption -> ProcessorOption
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Enum,Typeable ProcessorOption
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(forall d. Data d => d -> m d) -> a -> m a)
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-> (forall r. r -> c r) -> Constr -> c ProcessorOption
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(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c ProcessorOption
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(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> ProcessorOption -> c ProcessorOption
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Data)
processorOptions :: [ProcessorOption]
processorOptions :: [ProcessorOption]
processorOptions = forall a. IO a -> a
unsafeDoIO forall a b. (a -> b) -> a -> b
$ do
Ptr Word8
p <- IO (Ptr Word8)
cryptonite_aes_cpu_init
[Word8]
options <- forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
traverse (forall {a} {a}. (Storable a, Enum a) => Ptr a -> a -> IO a
getOption Ptr Word8
p) [ProcessorOption]
aesOptions
Bool
rdrand <- IO Bool
hasRDRand
forall (m :: * -> *) a. Monad m => a -> m a
return ([Word8] -> [ProcessorOption]
decodeOptions [Word8]
options forall a. [a] -> [a] -> [a]
++ [ ProcessorOption
RDRAND | Bool
rdrand ])
where
aesOptions :: [ProcessorOption]
aesOptions = [ ProcessorOption
AESNI .. ProcessorOption
PCLMUL ]
getOption :: Ptr a -> a -> IO a
getOption Ptr a
p = forall a. Storable a => Ptr a -> Int -> IO a
peekElemOff Ptr a
p forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. Enum a => a -> Int
fromEnum
decodeOptions :: [Word8] -> [ProcessorOption]
decodeOptions = forall a b. (a -> b) -> [a] -> [b]
map forall a. Enum a => Int -> a
toEnum forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. (a -> Bool) -> [a] -> [Int]
findIndices (forall a. Ord a => a -> a -> Bool
> Word8
0)
{-# NOINLINE processorOptions #-}
hasRDRand :: IO Bool
#ifdef SUPPORT_RDRAND
hasRDRand :: IO Bool
hasRDRand = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. Maybe a -> Bool
isJust IO (Maybe RDRand)
getRDRand
where getRDRand :: IO (Maybe RDRand)
getRDRand = forall a. EntropySource a => IO (Maybe a)
entropyOpen :: IO (Maybe RDRand)
#else
hasRDRand = return False
#endif
foreign import ccall unsafe "cryptonite_aes_cpu_init"
cryptonite_aes_cpu_init :: IO (Ptr Word8)