Struct ChaCha20 

pub struct ChaCha20 { /* private fields */ }

ChaCha20 (RFC 8439).

Stream cipher with a 256-bit key, a 96-bit nonce and a 32-bit block counter. Encryption and decryption are the same operation. Data of any length is accepted, in any number of calls: the keystream position is kept across calls. The (key, nonce) pair must never be reused.

Implementations

impl ChaCha20

pub const KEY_SIZE: usize = 32

Size of the key, in bytes.

pub const NONCE_SIZE: usize = 12

Size of the nonce, in bytes.

pub fn new(key: &[u8; 32], nonce: &[u8; 12]) -> Self

Initialize with key and nonce, starting at block counter 0.

pub fn with_counter(key: &[u8; 32], nonce: &[u8; 12], counter: u32) -> Self

Initialize with key and nonce, starting at block counter.

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

XOR the keystream into buf.

pub fn apply_keystream_to( &mut self, input: &[u8], output: &mut [u8], ) -> Result<(), Error>

XOR the keystream with input, writing the result to output.

Trait Implementations

impl Clone for ChaCha20

fn clone(&self) -> ChaCha20

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ChaCha20

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.