Struct Ratchet 

pub struct Ratchet { /* private fields */ }

One party’s half of a Double Ratchet session: a sending chain, a receiving chain, and the skipped-key store that lets messages arrive out of order.

Implementations

impl Ratchet

pub fn encrypt(&mut self, plaintext: &[u8]) -> Result<RatchetMessage, Error>

Encrypt plaintext, advancing the sending chain by one step.

pub fn decrypt( &mut self, msg: &RatchetMessage, rng: &mut impl RandomSource, ) -> Result<Vec<u8>, Error>

Decrypt msg, advancing the receiving chain (and performing a DH ratchet step, when the header names a new peer key) only once the AEAD tag verifies.

The whole state is cloned, mutated on the clone, and only committed back on success, so a forged frame with a plausible header but garbage ciphertext cannot burn a skipped-key slot or desync the receiving chain.

Trait Implementations

impl Clone for Ratchet

fn clone(&self) -> Ratchet

Returns a duplicate of the value.

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

Performs copy-assignment from source.