[#EVP_MAC_CTX_gettable_params]
= EVP_MAC_CTX_gettable_params
:mrdocs:

Return the OSSL_PARAM descriptors gettable from a live MAC context.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_PARAM.adoc[OSSL_PARAM] const*
EVP_MAC_CTX_gettable_params(xref:EVP_MAC_CTX.adoc[EVP_MAC_CTX]* ctx);
----

== Return Value

Array of OSSL_PARAM descriptors terminated by OSSL_PARAM_END, or NULL.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| MAC context to query.
|===


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