[#DH_get_nid]
= DH_get_nid
:mrdocs:

Return the named‐group NID for a DH object if its parameters match a known group (deprecated).

== Synopsis

Declared in `<openssl/dh.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
DH_get_nid(xref:DH.adoc[DH] const* dh);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

Matching NID such as NID_ffdhe2048, or NID_undef if the parameters are not a named group.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dh*
| DH object to query.
|===


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