[#OBJ_obj2nid]
= OBJ&lowbar;obj2nid
:mrdocs:

Return the NID for an ASN1&lowbar;OBJECT&period;

== Synopsis

Declared in `&lt;openssl&sol;objects&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OBJ&lowbar;obj2nid(xref:ASN1_OBJECT.adoc[ASN1&lowbar;OBJECT] const* o);
----

== Return Value

Corresponding NID, or NID&lowbar;undef on error&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *o*
| Object identifier to look up&period;
|===


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