[#EC_curve_nid2nist]
= EC_curve_nid2nist
:mrdocs:

Map an OpenSSL curve NID to its NIST curve name string.

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
EC_curve_nid2nist(int nid);
----

== Return Value

NIST name (for example "P‐256"), or NULL if `nid` has no NIST mapping.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *nid*
| Curve NID such as NID_X9_62_prime256v1.
|===


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