PROV_CIPHER_HW_AES_GCM_SIV
const PROV_CIPHER_HW_AES_GCM_SIV *hw; /* maybe not used, yet? */
const PROV_CIPHER_HW_AES_GCM_SIV *ossl_prov_cipher_hw_aes_gcm_siv(size_t keybits);
static const PROV_CIPHER_HW_AES_GCM_SIV aes_gcm_siv_hw = {
const PROV_CIPHER_HW_AES_GCM_SIV *ossl_prov_cipher_hw_aes_gcm_siv(size_t keybits)