n null.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../javax/security/auth/message/AuthException.html" title="class in javax.security.auth.message">AuthException</a></code> - If this provider does not support the 
          assignment of a default CallbackHandler to the returned 
          ClientAuthConfig.</dd>
<dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang">Secur