[#EVP_KEYEXCH_settable_ctx_params]
= EVP_KEYEXCH_settable_ctx_params
:mrdocs:

Return the OSSL_PARAM descriptors for parameters settable on a key‐exchange context.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_PARAM.adoc[OSSL_PARAM] const*
EVP_KEYEXCH_settable_ctx_params(xref:EVP_KEYEXCH.adoc[EVP_KEYEXCH] const* keyexch);
----

== Return Value

Constant OSSL_PARAM array for use with EVP_PKEY_CTX_set_params(), or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *keyexch*
| Key‐exchange implementation to query.
|===


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