Function decrypt_and_parse 

pub fn decrypt_and_parse<T>(
    key: &[u8; 32],
    ciphertext: &[u8],
    aad: &[u8],
) -> CryptoResult<T>
where
    T: DeserializeOwned,

Decrypt and parse a CBOR-encoded type.

Decrypts the ciphertext, then deserializes the plaintext as CBOR.