Struct ChaCha20Poly1305Cipher 

pub struct ChaCha20Poly1305Cipher { /* private fields */ }

ChaCha20-Poly1305 AEAD cipher supporting zero-copy in-place encryption and decryption directly within pre-allocated network packet buffers (such as AF_XDP UMEM chunks).

Implementations

impl ChaCha20Poly1305Cipher

pub fn new(key: [u8; 32]) -> Self

Creates a new cipher instance from a 32-byte symmetric key.

pub fn seal_in_place( &self, counter: u64, buf: &mut [u8], plaintext_len: usize, ) -> Result<usize, CryptoError>

Seal plaintext in-place inside buf[..plaintext_len], writing the 16-byte Poly1305 authentication tag immediately following the ciphertext into buf[plaintext_len..plaintext_len + 16].

The buffer must have capacity of at least plaintext_len + 16 bytes. Returns the total sealed ciphertext length (plaintext_len + 16).

pub fn open_in_place( &self, counter: u64, buf: &mut [u8], sealed_len: usize, ) -> Result<usize, CryptoError>

Open and authenticate ciphertext in-place inside buf[..sealed_len].

Expects the 16-byte Poly1305 authentication tag at the end of the ciphertext: buf[sealed_len - 16..sealed_len]. Returns the decrypted plaintext length (sealed_len - 16).

pub fn open_in_place_with_window( &self, counter: u64, buf: &mut [u8], sealed_len: usize, replay: &mut ReplayWindow, ) -> Result<usize, CryptoError>

Open and authenticate ciphertext in-place, verifying against a sliding anti-replay window.

The replay window is checked before AEAD decryption and committed only upon successful authentication.

Trait Implementations

impl Debug for ChaCha20Poly1305Cipher

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

Formats the value using the given formatter.