# define OPENSSL_EC_EXPLICIT_CURVE 0x000
# define OPENSSL_EC_NAMED_CURVE 0x001
-typedef struct ecpk_parameters_st ECPKPARAMETERS;
-
EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);