crypto_roundup
crypto_roundup(sizeof(struct aead_request) + crypto_aead_reqsize(TFM))
crypto_roundup(crypto_aead_ivsize(TFM))
crypto_roundup(sizeof(struct shash_desc) + crypto_shash_descsize(TFM))
crypto_roundup(crypto_shash_digestsize(TFM))
crypto_roundup(Kp.len);
crypto_roundup(K.len) +
crypto_roundup(data.len);
crypto_roundup(K.len);
crypto_roundup(data.len);