const char *name;
ECDSA_SIG *(*ecdsa_do_sign)(const unsigned char *dgst, int dgst_len,
const BIGNUM *inv, const BIGNUM *rp, EC_KEY *eckey);
const char *name;
ECDSA_SIG *(*ecdsa_do_sign)(const unsigned char *dgst, int dgst_len,
const BIGNUM *inv, const BIGNUM *rp, EC_KEY *eckey);