Find an unsigned attribute by OID and return its first ASN.1 value data pointer.
Declared in <openssl/cms.h>
void*
CMS_unsigned_get0_data_by_OBJ(
CMS_SignerInfo* si,
ASN1_OBJECT* oid,
int lastpos,
int type);Pointer to the attribute value data, or NULL on error or if not found.
| Name | Description |
|---|---|
| si | SignerInfo whose unsignedAttrs are searched. |
| oid | Attribute type object identifier to match. |
| lastpos | Search start index; use a negative value to start from the beginning (see CMS_signed_get0_data_by_OBJ). |
| type | Expected ASN.1 type of the attribute value (must not be V_ASN1_BOOLEAN or V_ASN1_NULL). |