EC_POINT_invert
int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
LCRYPTO_ALIAS(EC_POINT_invert);
if (!EC_POINT_invert(group, r, ctx))
if (!EC_POINT_invert(group, r, ctx))
LCRYPTO_USED(EC_POINT_invert);
if (!EC_POINT_invert(group, point, NULL)) {
if (!EC_POINT_invert(group, P, ctx))
if (!EC_POINT_invert(group, Q, ctx))