如何在网络浏览器上触发SSL重新握手？

我有一个配置为请求SSL客户端证书的Web服务器。如果客户端具有可接受的证书，他们将看到实际的内容，但如果没有，我将退回SSL，而无需客户端身份验证，并显示一个错误页面，通知他们连接安全令牌并重试。

I have a web server that is configured to request a client certificate for SSL. If the client has an acceptable certificate they will see the actual content, but in case do not, I fall back to SSL without client authentication and show an error page that informs them to connect their security token and try again.

问题是，即使他们连接了令牌，浏览器也不会重新协商新的SSL会话，因为它认为当前会话很好。因此，我需要一种使当前SSL会话无效的方法。

The problem is, even when they connect their token, the browser will not renegotiate a new SSL session because it thinks that the current session is fine. So I need a way to invalidate the current SSL session.

我尝试在服务器上执行此操作，该服务器是Tomcat 6：

I tried to do it on the server, which is a Tomcat 6:

response.setHeader("Connection", "close");          // open new socket next time
response.flushBuffer();

Object sslSessionMgr = request.getAttribute("javax.servlet.request.ssl_session_mgr");
if (sslSessionMgr != null) {
    try {
        Method invalidateSession =
                Class.forName("org.apache.tomcat.util.net.SSLSessionManager").getMethod("invalidateSession");
        invalidateSession.setAccessible(true);
        invalidateSession.invoke(sslSessionMgr);
    } catch (Exception e) {/*ignore*/}
}

但是事实证明， sslSessionMgr 始终为 null ，我想知道我在这里做错什么了。

But it turns out that sslSessionMgr is always null and I wonder what am I doing wrong here.

在客户端上当然没有通用的解决方案，但幸运的是 window.crypto.logout（）为FireFox起到了作用。我在某处读到IE的等效项是 document.execCommand（ ClearAuthenticationCache）或某些ActiveX控件？无论如何，我似乎都无法在IE或Chrome上做到这一点。

On the client of course there is not universal solution, but fortunately window.crypto.logout() does the trick for FireFox. I read somewhere that the equivalent for IE would be document.execCommand("ClearAuthenticationCache") or maybe some ActiveX control? In any case I cannot seem to do it for IE or Chrome.

那我该怎么办？我可以修复其中任何一种解决方案，还是有其他解决方案？

So what can I do here? Can I fix any of these solutions, or is there any other one?