EC_KEY_up_ref(), EC_KEY_set_group(), EC_KEY_set_public_key(), EC_KEY_precompute_mult(), EC_KEY_generate_key(), EC_KEY_check_key(), EC_KEY_set_public_key_affine_coordinates(), EC_KEY_oct2key() and EC_KEY_oct2priv() return 1 on success or 0 on error.</p>

<p>EC_KEY_set_private_key() returns 1 on success or 0 on error except when the priv_key argument is NULL, in that case it returns 0, for legacy compatibility, and should not be treated as an error.</p>

<p>EC_KEY_get0_group() returns the EC_GROUP associated 