+ int (*export_to) (const EVP_PKEY *pk, void *to_keydata,
+ EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx,
+ const char *propq);
+ OSSL_CALLBACK *import_from;
+
+ int (*priv_decode_with_libctx) (EVP_PKEY *pk,
+ const PKCS8_PRIV_KEY_INFO *p8inf,
+ OPENSSL_CTX *libctx,
+ const char *propq);