CMS_signed_get_attr_by_OBJ
int CMS_signed_get_attr_by_OBJ(const CMS_SignerInfo *si, const ASN1_OBJECT *obj,
LCRYPTO_ALIAS(CMS_signed_get_attr_by_OBJ);
LCRYPTO_USED(CMS_signed_get_attr_by_OBJ);