[#PKCS8_pkey_add1_attr_by_OBJ]
= PKCS8_pkey_add1_attr_by_OBJ
:mrdocs:

Append an attribute identified by `obj` to a PKCS#8 private key info.

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PKCS8_pkey_add1_attr_by_OBJ(
    xref:PKCS8_PRIV_KEY_INFO.adoc[PKCS8_PRIV_KEY_INFO]* p8,
    xref:ASN1_OBJECT.adoc[ASN1_OBJECT] const* obj,
    int type,
    unsigned char const* bytes,
    int len);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p8*
| PKCS#8 structure receiving the attribute.
| *obj*
| Attribute type OID.
| *type*
| ASN.1 string/value type for `bytes` (V_ASN1_*).
| *bytes*
| Attribute value bytes.
| *len*
| Length of `bytes,` or ‐1 if `bytes` is NUL‐terminated where applicable.
|===


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