extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth;
extern const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5];
extern const EVP_PKEY_ASN1_METHOD eckey_asn1_meth;
+extern const EVP_PKEY_ASN1_METHOD ecx25519_asn1_meth;
extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth;
extern const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2];