Function get_s_key

lrwn/src/keys.rs:82–112

(
    opt_neg: bool,
    typ: u8,
    nwk_key: &AES128Key,
    net_id: &NetID,
    join_eui: &EUI64,
    join_nonce: u32,
    dev_nonce: u16,
)

}

fn get_s_key(
    opt_neg: bool,
    typ: u8,
    nwk_key: &AES128Key,
    net_id: &NetID,
    join_eui: &EUI64,
    join_nonce: u32,
    dev_nonce: u16,
) -> Result<AES128Key> {
    let key_bytes = nwk_key.to_bytes();
    let key = Array::from(key_bytes);
    let cipher = Aes128::new(&key);

    let mut b: [u8; 16] = [0; 16];

    b[0] = typ;
    if opt_neg {
        b[1..4].clone_from_slice(&join_nonce.to_le_bytes()[0..3]);
        b[4..12].clone_from_slice(&join_eui.to_le_bytes());
        b[12..14].clone_from_slice(&dev_nonce.to_le_bytes()[0..2]);
    } else {
        b[1..4].clone_from_slice(&join_nonce.to_le_bytes()[0..3]);
        b[4..7].clone_from_slice(&net_id.to_le_bytes());
        b[7..9].clone_from_slice(&dev_nonce.to_le_bytes()[0..2]);
    }

    let mut block = Block::from(b);
    cipher.encrypt_block(&mut block);

    Ok(AES128Key::from_slice(&block)?)
}

fn get_js_key(typ: u8, dev_eui: &EUI64, nwk_key: &AES128Key) -> Result<AES128Key> {
    let key_bytes = nwk_key.to_bytes();