Struct AesCcm 

pub struct AesCcm { /* private fields */ }

AES in CCM (counter with CBC-MAC) authenticated mode, as in NIST SP 800-38C.

CCM needs the total length of the additional authenticated data and of the payload up front. Only the first tag_len bytes of the tag returned by Symmetric::aes_blocking_finish are valid.

Implementations

impl AesCcm

pub fn new( key: &[u8], nonce: &[u8], aad_len: usize, payload_len: usize, tag_len: usize, ) -> Result<Self, Error>

Creates a CCM cipher.

• key: 16, 24 or 32 bytes. See the module documentation for which key lengths each chip supports.
• nonce: 7 to 13 bytes, unique for every message.
• aad_len: total length of the additional authenticated data.
• payload_len: total length of the payload.
• tag_len: 4, 6, 8, 10, 12, 14 or 16 bytes.

A shorter nonce allows a longer payload. With a 13-byte nonce the payload is limited to 65535 bytes.

Errors: InvalidKeyLength, InvalidNonceLength, InvalidTagLength, and InvalidLength if the payload is too long for the nonce.

Trait Implementations

impl AuthenticatedCipher for AesCcm

impl Cipher for AesCcm

impl Clone for AesCcm

fn clone(&self) -> AesCcm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AesCcm