Struct chacha20::XChaCha

pub struct XChaCha<R: Rounds>(_);

This is supported on crate feature xchacha only.

XChaCha family stream cipher, generic around a number of rounds.

Use the XChaCha8, XChaCha12, or XChaCha20 type aliases to select a specific number of rounds.

Generally XChaCha20 is preferred.

Trait Implementations

impl<R: Rounds> NewCipher for XChaCha<R>

type KeySize = U32

Key size in bytes

type NonceSize = U24

Nonce size in bytes

fn new(key: &Key, nonce: &XNonce) -> Self

Create new stream cipher instance from key and nonce arrays.

fn new_from_slices(key: &[u8], nonce: &[u8]) -> Result<Self, InvalidLength>

Create new stream cipher instance from variable length key and nonce given as byte slices.

impl<R: Rounds> StreamCipher for XChaCha<R>

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.

fn apply_keystream(&mut self, data: &mut [u8])

Apply keystream to the data.

impl<R: Rounds> StreamCipherSeek for XChaCha<R>

fn try_current_pos<T: SeekNum>(&self) -> Result<T, OverflowError>

Try to get current keystream position

fn try_seek<T: SeekNum>(&mut self, pos: T) -> Result<(), LoopError>

Try to seek to the given position

fn current_pos<T>(&self) -> T where
    T: SeekNum, 

Get current keystream position

fn seek<T>(&mut self, pos: T) where
    T: SeekNum, 

Seek to the given position