IS25519
#define KEYLENID(id) (IS25519(id) ? X25519_KEYLEN \
(IS25519(id) ? ((id) == EVP_PKEY_X25519 ? ECX_KEY_TYPE_X25519 \
if (IS25519(pkey->ameth->pkey_id)) {
if (IS25519(pkey->ameth->pkey_id)) {