ec_GFp_simple_blind_coordinates
int ec_GFp_simple_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx);
.blind_coordinates = ec_GFp_simple_blind_coordinates,
.blind_coordinates = ec_GFp_simple_blind_coordinates,
.blind_coordinates = ec_GFp_simple_blind_coordinates,