[#EC_curve_nid2nist]
= EC&lowbar;curve&lowbar;nid2nist
:mrdocs:

Map an OpenSSL curve NID to its NIST curve name string&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
EC&lowbar;curve&lowbar;nid2nist(int nid);
----

== Return Value

NIST name (for example &quot;P&hyphen;256&quot;), or NULL if `nid` has no NIST mapping&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *nid*
| Curve NID such as NID&lowbar;X9&lowbar;62&lowbar;prime256v1&period;
|===


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