Struct Rc4KeyState 

pub struct Rc4KeyState { /* private fields */ }

A reusable RC4 key state. The state is advanced as data is transformed, so a single Rc4KeyState represents one continuous cipher stream.

Implementations

impl Rc4KeyState

pub fn new(key: &[u8]) -> Self

Creates a new key state by scheduling the given key bytes.

Panics

Panics if key is empty or longer than 256 bytes (the RC4 key-state length).

pub fn key_state(&self) -> &[u8; 256]

Returns the current internal key state bytes (for inspection/testing).

pub fn indices(&self) -> (usize, usize)

Returns the two transform indices.

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

Transforms input into output using (and advancing) this key state.

RC4 is symmetric, so the same operation both encrypts and decrypts.

Panics

Panics if output is shorter than input.

pub fn transform_in_place(&mut self, buffer: &mut [u8])

Transforms buffer in place.

pub fn advance(&mut self, amount: usize)

Advances the key state by amount steps without transforming any data.

Trait Implementations

impl Clone for Rc4KeyState

fn clone(&self) -> Rc4KeyState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rc4KeyState

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

Formats the value using the given formatter.