pub(crate) const AES_256_CBC_HMAC_SHA256_AEAD: i64 = -70011;Expand description
AES-256-CBC-HMAC-SHA256 used as an Encrypt-then-MAC AEAD. No IANA-registered COSE algorithm
describes this construction: the MAC is taken over the IV, length-prefixed ciphertext, and
associated data, so that the associated data required by COSE is authenticated. See
Aes256CbcHmacSha256Aead for
the exact MAC input. A private-use value is therefore allocated.