fopt hexsalt:3638271c SSKDF</code></pre>

<p>Use SSKDF with Hash to create a hex-encoded derived key from a secret key, salt and info:</p>

<pre><code>    openssl kdf -keylen 14 -kdfopt digest:SHA2-256 \
                -kdfopt hexkey:6dbdc23f045488 \
                -kdfopt hexinfo:a1b2c3d4 SSKDF</code></pre>

<p>Use SSHKDF to create a hex-encoded derived key from a secret key, hash and session_id:</p>

<pre><code>    openssl kdf -keylen 16 -kdfopt digest:SHA2-256 \
                -kdfopt hexkey:010203040