DigestSignInit() or EVP_DigestVerifyInit(), the digest <b>type</b> parameter <b>MUST</b> be set to <b>NULL</b>.</p>

<p>Applications wishing to sign certificates (or other structures such as CRLs or certificate requests) using Ed25519 or Ed448 can either use X509_sign() or X509_sign_ctx() in the usual way.</p>

<p>A context for the <b>Ed25519</b> algorithm can be obtained by calling:</p>

<pre><code> EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL);</code></pre>

<p>For the <b>Ed448</b> algo