Struct SFrameEncryptor 

pub struct SFrameEncryptor { /* private fields */ }

Stateful per-sender SFrame encryptor.

Holds the derived key for one (epoch, leaf_index) KID and an internal counter that increments on every call to encrypt.

Obtain via crate::SFrameSession::encryptor.

Implementations

impl SFrameEncryptor

pub fn encrypt( &mut self, plaintext: &[u8], extra_aad: &[u8], ) -> Result<Vec<u8>, SFrameError>

Encrypts plaintext and returns the complete SFrame payload: header ‖ ciphertext ‖ GCM-tag.

extra_aad is bound into the AEAD tag (e.g. an RTP header) but is not carried in the returned payload; the receiver supplies the same slice to SFrameDecryptor::decrypt.

pub fn counter(&self) -> u64

Current counter value (number of frames encrypted so far).

pub fn kid(&self) -> u64

KID this encryptor was created for.