ecdsa_sign_setup
return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
.ecdsa_sign_setup = ecdsa_sign_setup,
int (*ecdsa_sign_setup)(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv,