Struct Aes256Gcm 

pub struct Aes256Gcm { /* private fields */ }

AES-256-GCM authenticated cipher (pure-Rust implementation).

On x86-64 machines with AES-NI + PCLMULQDQ the methods automatically dispatch to the hardware-accelerated path (see aes256_amd64).

Implementations

impl Aes256Gcm

pub const KEY_SIZE: usize = 32

pub const TAG_SIZE: usize = 16

pub const NONCE_SIZE: usize = 12

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

Create a new Aes256Gcm instance from a 32-byte key.

pub fn encrypt_in_place( &self, in_out: &mut [u8], nonce: &[u8; 12], aad: &[u8], ) -> [u8; 16]

Encrypt in_out in-place and return the 16-byte authentication tag.

• nonce – 12-byte nonce (must be unique per (key, plaintext) pair)
• aad – additional authenticated data (not encrypted)

pub fn decrypt_in_place( &self, in_out: &mut [u8], tag: &[u8; 16], nonce: &[u8; 12], aad: &[u8], ) -> Result<(), AeadError>

Decrypt in_out in-place and verify the authentication tag.

Returns Err(Error::Unspecified) if the tag does not match.