Synchronous stream cipher core trait.
fn try_apply_keystream(&mut self, data: &mut [u8]) -> Result<(), LoopError>
Apply keystream to the data, but return an error if end of a keystream will be reached.
If end of the keystream will be achieved with the given data length,
method will return
Err(LoopError) without modifying provided
fn apply_keystream(&mut self, data: &mut [u8])
Apply keystream to the data.
It will XOR generated keystream with the data, which can be both encryption and decryption.
If end of the keystream will be reached with the given data length,
method will panic without modifying the provided