Struct Salsa20 

pub struct Salsa20 { /* private fields */ }

Salsa20 stream cipher state (DJB / eSTREAM variant).

Holds the initial state (key + nonce + 64-bit counter) and buffers the leftover bytes of the current keystream block so partial calls to Self::apply_keystream behave like one contiguous stream.

Implementations

impl Salsa20

pub fn new(key: &[u8; 32], nonce: &[u8; 8], counter: u64) -> Self

Initialise Salsa20 with a 256-bit key, an 8-byte nonce, and an initial 64-bit block counter (usually 0).

pub fn new_128(key: &[u8; 16], nonce: &[u8; 8], counter: u64) -> Self

Initialise Salsa20 with a 128-bit key, an 8-byte nonce, and an initial 64-bit block counter. Uses the tau expansion constants and repeats the key across the state border.

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

XOR the keystream into data in place. Encrypts or decrypts indifferently (the cipher is symmetric).

Handles arbitrary lengths and partial blocks: leftover keystream bytes are remembered between calls, so feeding data in chunks produces the same output as one contiguous call.

Trait Implementations

impl Clone for Salsa20

fn clone(&self) -> Salsa20

Returns a duplicate of the value.

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

Performs copy-assignment from source.