[#EC_KEY_METHOD_set_init]
= EC_KEY_METHOD_set_init
:mrdocs:

Install lifecycle and field‐assignment callbacks on an EC_KEY_METHOD (deprecated).

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void
EC_KEY_METHOD_set_init(
    xref:EC_KEY_METHOD.adoc[EC_KEY_METHOD]* meth,
    int(* init)(xref:EC_KEY.adoc[EC_KEY]*),
    void(* finish)(xref:EC_KEY.adoc[EC_KEY]*),
    int(* copy)(xref:EC_KEY.adoc[EC_KEY]*, xref:EC_KEY.adoc[EC_KEY] const*),
    int(* set_group)(xref:EC_KEY.adoc[EC_KEY]*, xref:EC_GROUP.adoc[EC_GROUP] const*),
    int(* set_private)(xref:EC_KEY.adoc[EC_KEY]*, xref:BIGNUM.adoc[BIGNUM] const*),
    int(* set_public)(xref:EC_KEY.adoc[EC_KEY]*, xref:EC_POINT.adoc[EC_POINT] const*));
----

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

[cols="1,4"]
|===
| Name| Description
| *meth*
| Method table to update.
| *init*
| Optional constructor called when an EC_KEY using `meth` is created.
| *finish*
| Optional destructor called when such an EC_KEY is freed.
| *copy*
| Optional deep‐copy callback from `src` into `dest.`
| *set_group*
| Optional callback to assign the EC_GROUP on the key.
| *set_private*
| Optional callback to assign the private BIGNUM.
| *set_public*
| Optional callback to assign the public EC_POINT.
|===


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