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-- |
-- Module : Crypto.Cipher.AES
-- License : BSD-style
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
-- Stability : stable
-- Portability : good
{-# LANGUAGE CPP #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
module Crypto.Cipher.AES
( AES128
, AES192
, AES256
) where
import Crypto.Error
import Crypto.Cipher.Types
import Crypto.Cipher.Types.Block
import Crypto.Cipher.AES.Primitive
import Crypto.Internal.Imports
-- | AES with 128 bit key
newtype AES128 = AES128 AES
deriving (NFData)
-- | AES with 192 bit key
newtype AES192 = AES192 AES
deriving (NFData)
-- | AES with 256 bit key
newtype AES256 = AES256 AES
deriving (NFData)
instance Cipher AES128 where
cipherName _ = "AES128"
cipherKeySize _ = KeySizeFixed 16
cipherInit k = AES128 `fmap` initAES k
instance Cipher AES192 where
cipherName _ = "AES192"
cipherKeySize _ = KeySizeFixed 24
cipherInit k = AES192 `fmap` initAES k
instance Cipher AES256 where
cipherName _ = "AES256"
cipherKeySize _ = KeySizeFixed 32
cipherInit k = AES256 `fmap` initAES k
#define INSTANCE_BLOCKCIPHER(CSTR) \
instance BlockCipher CSTR where \
{ blockSize _ = 16 \
; ecbEncrypt (CSTR aes) = encryptECB aes \
; ecbDecrypt (CSTR aes) = decryptECB aes \
; cbcEncrypt (CSTR aes) (IV iv) = encryptCBC aes (IV iv) \
; cbcDecrypt (CSTR aes) (IV iv) = decryptCBC aes (IV iv) \
; ctrCombine (CSTR aes) (IV iv) = encryptCTR aes (IV iv) \
; aeadInit AEAD_GCM (CSTR aes) iv = CryptoPassed $ AEAD (gcmMode aes) (gcmInit aes iv) \
; aeadInit AEAD_OCB (CSTR aes) iv = CryptoPassed $ AEAD (ocbMode aes) (ocbInit aes iv) \
; aeadInit _ _ _ = CryptoFailed CryptoError_AEADModeNotSupported \
}; \
instance BlockCipher128 CSTR where \
{ xtsEncrypt (CSTR aes1, CSTR aes2) (IV iv) = encryptXTS (aes1,aes2) (IV iv) \
; xtsDecrypt (CSTR aes1, CSTR aes2) (IV iv) = decryptXTS (aes1,aes2) (IV iv) \
};
INSTANCE_BLOCKCIPHER(AES128)
INSTANCE_BLOCKCIPHER(AES192)
INSTANCE_BLOCKCIPHER(AES256)
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