[#EVP_KEYEXCH_names_do_all]
= EVP_KEYEXCH_names_do_all
:mrdocs:

Invoke a callback for every name associated with a key‐exchange algorithm.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_KEYEXCH_names_do_all(
    xref:EVP_KEYEXCH.adoc[EVP_KEYEXCH] const* keyexch,
    void(* fn)(char const*, void*),
    void* data);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *keyexch*
| Fetched key‐exchange implementation to enumerate names for.
| *fn*
| Callback receiving each name string and `data.`
| *data*
| User pointer passed through to `fn.`
|===


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