p>Use the pem encoded SSL_SESSION data stored in <i>file</i> as the basis of a PSK. Note that this will only work if TLSv1.3 is negotiated.</p>

</dd>
<dt id="srpvfile"><b>-srpvfile</b></dt>
<dd>

<p>The verifier file for SRP. This option is deprecated.</p>

</dd>
<dt id="srpuserseed"><b>-srpuserseed</b></dt>
<dd>

<p>A seed string for a default user salt. This option is deprecated.</p>

</dd>
<dt id="listen"><b>-listen</b></dt>
<dd>

<p>This option can only be used in conjunction with one of the DTLS optio