Struct AESCCM 

pub struct AESCCM<E>
where
    E: Encrypt,
{ /* private fields */ }

The primary AES-CCM engine context carrying encryption keys, active nonces, and the peripheral driver.

Implementations

impl<E> AESCCM<E>

where E: Encrypt,

pub fn new(aes: E, key: [u8; 16]) -> Self

Creates a new AES-CCM peripheral engine using a key and an hardware peripheral implementation.

pub fn encrypt<T>( &mut self, packet_data: &PacketData<T>, ) -> Result<Frame, Error>

where T: Serialize + DeserializeOwned,

Encrypts packet data into a lightweight, authenticated over-the-air AES-CCM format.

+-----------------------------------------------------------------------+
|                        OVER-THE-AIR FRAME                             |
+--------------------------+--------------------+-----------------------+
|       dst (6 Bytes)      |   flags (1 Byte)   |      ctr (5 Bytes)    | -> HEADER (12 Bytes)
+--------------------------+--------------------+-----------------------+
| Ciphertext (N Bytes)                                                  | -> PAYLOAD
+-----------------------------------------------------------------------+
| Tag (16 Bytes)                                                         | -> MAC/TAG
+-----------------------------------------------------------------------+

Errors

Returns Err(PacketError::BufferOverflow) if serialization fails or Err(PacketError::AESCounterOverflow) if the nonce limits are exceeded.

pub fn decrypt<T>(&mut self, bytes: &mut [u8]) -> Result<PacketData<T>, Error>

where T: Serialize + DeserializeOwned,

Decrypts and authenticates an incoming packet from a mutable slice buffer in-place.

Errors

Returns:

• PacketError::InvalidFormat if parsing fails.
• PacketError::Duplicate if a potential replay attack is intercepted.
• PacketError::Corrupted if the tag verification fails.