Sets the IV length to be used for an AEAD cipher for the associated cipher ctx.
The length of the "ivlen" parameter should not exceed that of a B<size_t>.
+=item "mackey" (B<OSSL_CIPHER_PARAM_AEAD_MAC_KEY>) <octet string>
+
+Sets the MAC key used by composite AEAD ciphers such as AES-CBC-HMAC-SHA256.
+
=item "randkey" (B<OSSL_CIPHER_PARAM_RANDOM_KEY>) <octet string>
Gets a implementation specific randomly generated key for the associated