return ecdh->meth->compute_key(key, pub_key, eckey);
return ecdh->meth->compute_key(out, outlen, pub_key, eckey, KDF);
int ECDH_compute_key(unsigned char *key, const EC_POINT *pub_key, EC_KEY *eckey){	ECDH_DATA *ecdh = ecdh_check(eckey);	if (ecdh == NULL)		return 0;	return ecdh->meth->compute_key(key, pub_key, eckey);}