[#EVP_PKEY_gettable_params]
= EVP_PKEY_gettable_params
:mrdocs:

Return the OSSL_PARAM descriptors for parameters retrievable from `pkey.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_PARAM.adoc[OSSL_PARAM] const*
EVP_PKEY_gettable_params(xref:EVP_PKEY.adoc[EVP_PKEY] const* pkey);
----

== Return Value

Constant OSSL_PARAM array, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pkey*
| Key whose gettable parameter names and types are listed.
|===


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