NID_id_smime_aa_signingCertificate
{ NID_id_smime_aa_signingCertificate, CMS_ATTR_F_SIGNED | CMS_ATTR_F_ONLY_ONE | CMS_ATTR_F_ONE_ATTR_VALUE },
ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificate);
ret = CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificate,
{"id-smime-aa-signingCertificate", "id-smime-aa-signingCertificate", NID_id_smime_aa_signingCertificate, 11, &so[1496]},
if (!PKCS7_add_signed_attribute(si, NID_id_smime_aa_signingCertificate,
attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificate);