Struct ChaChaOriginal 

pub struct ChaChaOriginal<const ROUNDS: usize> { /* private fields */ }

ChaCha Context (Original version - Bernstein & co)

This variant has an 8 bytes nonce initializer, and an 8 bytes counter

Note that the number of rounds is exposed here, and only the value of 8, 12 and 20 are supported. any other values triggers a runtime assertion.

If you don’t know what round values to use, use 20

Implementations

impl<const ROUNDS: usize> ChaChaOriginal<ROUNDS>

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

Create a new ChaCha20 context.

• The key must be 16 or 32 bytes
• The nonce must be 8 bytes

For using 12 bytes (96 bits) nonces, uses the IETF variant ChaCha

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

Process the input in place through the cipher xoring

To get only the stream of this cipher, one can just pass the zero buffer (X xor 0 = X)

pub fn process(&mut self, input: &[u8], output: &mut [u8])

Process the input through the cipher, xoring the byte one-by-one

the output need to be the same size as the input otherwise this function will panic.

Trait Implementations

impl<const ROUNDS: usize> Clone for ChaChaOriginal<ROUNDS>

fn clone(&self) -> ChaChaOriginal<ROUNDS>

Returns a duplicate of the value.

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

Performs copy-assignment from source.