Portability | unknown |
---|---|
Stability | stable |
Maintainer | Vincent Hanquez <vincent@snarc.org> |
this CPRNG is an AES 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:
aes (IV xor
counter) -> 16 bytes output
- data AESRNG
- make :: ByteString -> Either GenError AESRNG
- makeSystem :: IO AESRNG
- genRandomBytes :: AESRNG -> Int -> (ByteString, AESRNG)
Documentation
An opaque object containing an AES CPRNG
make :: ByteString -> Either GenError AESRNGSource
make an AES RNG from a bytestring seed. 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.
use makeSystem
to not have to deal with the generator seed.
Initialize a new AES RNG using the system entropy.
genRandomBytes :: AESRNG -> Int -> (ByteString, AESRNG)Source
get a Random number of bytes from the RNG. it generate randomness by block of 16 bytes, but will truncate to the number of bytes required, and lose the truncated bytes.