PKCS7_get_signed_attribute
LCRYPTO_USED(PKCS7_get_signed_attribute);
if ((cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities)) == NULL)
if (PKCS7_get_signed_attribute(si, NID_pkcs9_contentType))
LCRYPTO_ALIAS(PKCS7_get_signed_attribute);
if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid);
attr = PKCS7_get_signed_attribute(si,
attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificateV2);