Crypto.Random.AESCtr

this CPRNG is an AES cbc based counter system.

the internal size of fields are: 16 bytes IV, 16 bytes counter, 32 bytes key

each block are generated the following way: (IV xor counter) aes key -> 16 bytes output

Documentation

data AESRNG

An opaque object containing an AES CPRNG

Instances

Show AESRNG

CryptoRandomGen AESRNG

make :: ByteString -> Either GenError AESRNG

make an AESRNG from a bytestring. the bytestring need to be at least 64 bytes. if the bytestring is longer, the extra bytes will be ignored and will not take part in the initialization.

makeSystem :: IO AESRNG

Initialize a new AESRng using the system entropy.

getRandomBytes :: AESRNG -> Int -> (ByteString, AESRNG)

get a Random number of bytes from the RNG. for efficienty and not wasted any randomness, it's better to generate bytes on multiple of 16, however it will works for any size.