Codec.Crypto.SimpleAES

A pure interface to AES

Documentation

data Mode

Constructors

ECB

CBC

data Direction

Constructors

Encrypt

Decrypt

type Key = ByteString

type IV = ByteString

newIV :: IO IV

randomKey :: IO Key

crypt

Arguments

:: Mode

-> Key

The AES key - 16, 24 or 32 bytes

-> IV

-> Direction

-> ByteString

Bytestring to encrypt/decrypt

-> ByteString

Encryption/decryption for lazy bytestrings. The input string is zero-padded to a multiple of 16. It is your obligation to separate encode the length of the string.

Properties: x == y => crypt mode key iv dir x == crypt mode key iv dir y take (length x) (crypt mode key iv Decrypt (crypt mode key iv Encrypt x)) == x

encryptMsg :: Mode -> Key -> ByteString -> IO ByteString

Encrypt a bytestring using a random seed (IV). Since the seed is random, this function is tainted by IO.

encryptMsg' :: Mode -> Key -> IV -> ByteString -> ByteString

Encrypt a ByteString using a given seed (IV). The resulting ByteString contains both the seed and the original length of the input (before padding).

decryptMsg :: Mode -> Key -> ByteString -> ByteString

decryptMsg' :: Mode -> Key -> ByteString -> Either String ByteString