[#EC_KEY_new_by_curve_name_ex]
= EC_KEY_new_by_curve_name_ex
:mrdocs:

Creates a new EC_KEY object using a named curve as underlying EC_GROUP object.

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
xref:EC_KEY.adoc[EC_KEY]*
EC_KEY_new_by_curve_name_ex(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* ctx,
    char const* propq,
    int nid);
----

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

EC_KEY object or NULL if an error occurred.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| The library context for to use for this EC_KEY. May be NULL in which case the default library context is used.
| *propq*
| Any property query string
| *nid*
| NID of the named curve.
|===


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