[#EC_GROUP_new_by_curve_name_ex]
= EC_GROUP_new_by_curve_name_ex
:mrdocs:

Creates a EC_GROUP object with a curve specified by a NID

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EC_GROUP.adoc[EC_GROUP]*
EC_GROUP_new_by_curve_name_ex(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq,
    int nid);
----

== Return Value

newly created EC_GROUP object with specified curve or NULL if an error occurred

== Parameters

[cols="1,4"]
|===
| Name| Description
| *libctx*
| The associated library context or NULL for the default context
| *propq*
| A property query string
| *nid*
| NID of the OID of the curve name
|===


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