a certificate the verify callback will be invoked. A write operation must take place for the Certificate Request to be sent to the client, this can be done with SSL_do_handshake() or SSL_write_ex(). Only one certificate request may be outstanding at any time.</p>

<p>When post-handshake authentication occurs, a refreshed NewSessionTicket message is sent to the client.</p>

<p>Post-handshake authentication cannot be used with QUIC. SSL_set_post_handshake_auth() has no effect if called on a QUIC SSL object.</