R</b> data, additional values used during generation may be required to be set into the key.</p>

<p>EVP_PKEY_todata(), OSSL_PARAM_merge(), and EVP_PKEY_fromdata() are useful to add these parameters to the original key or domain parameters before the actual validation. In production code the return values should be checked.</p>

<pre><code>EVP_PKEY *received_domp = ...; /* parameters received and decoded */
unsigned char *seed = ...;     /* and additional parameters received */
size_t seedlen = ...;        