AC_CTX_gettable_params() return constant <a href="../man3/OSSL_PARAM.html">OSSL_PARAM(3)</a> arrays that describe the retrievable parameters that can be used with EVP_MAC_CTX_get_params(). EVP_MAC_gettable_ctx_params() returns the parameters that can be retrieved from the algorithm, whereas EVP_MAC_CTX_gettable_params() returns the parameters that can be retrieved in the context&#39;s current state.</p>

<p>EVP_MAC_settable_ctx_params() and EVP_MAC_CTX_settable_params() return constant <a href="../man3/OSSL