[#PKCS8_add_keyusage]
= PKCS8_add_keyusage
:mrdocs:

Add a Microsoft key‐usage attribute to PKCS#8 private key info.

== Synopsis

Declared in `<openssl/pkcs12.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PKCS8_add_keyusage(
    xref:PKCS8_PRIV_KEY_INFO.adoc[PKCS8_PRIV_KEY_INFO]* p8,
    int usage);
----

== Return Value

1 on success, 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p8*
| PKCS#8 private key info to modify.
| *usage*
| Key‐usage flag (KEY_SIG or KEY_EX).
|===


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