ridl 0.6.1

use chacha20::cipher::{KeyIvInit, StreamCipher};

use crate::symm_encr::KeySecret;

pub struct UnauthEncryptionStream {
    cipher: chacha20::ChaCha20,
}

impl UnauthEncryptionStream {
    pub fn new(key: KeySecret, nonce: chacha20::Nonce) -> Self {
        let cipher = chacha20::ChaCha20::new(key.as_slice().into(), &nonce);
        UnauthEncryptionStream { cipher }
    }

    pub fn xor_chunk(&mut self, chunk: &mut [u8]) {
        self.cipher.apply_keystream(chunk)
    }
}