Sunday, October 14, 2012

Form Based authentication in JBOSS

We discussed about basic authentication in JBOSS. Now we are going to discuss about form based authentication. As we discussed earlier, we have four types of authentication mechanisms.

As the name suggests, credentials are taken from a user filled form.  In addition to the changes done above we have to add a login config element to the web.xml outside the security constraint element and inside web-app element. It should be noted that only one login config block should be there.


We have to create different jsp files, login.jsp, loginfail.jsp and logout.jsp.  We should add a login form in the body of login.jsp.

<form method="post" action="j_security_check">
            <input type="text" name="j_username" /><br/>
            <input type="password" name="j_password" /><br/>
            <input type="submit" value="Login" />

If the login is failed code in the loginfail.jsp will get executed.

String redirectURL = "/Form-Base-Auth-war/FormServlet";

This code is written between jsp tags. In case of failure user is redirected to the login page.  
In the servlet we have given a link to logout.jsp.

out.println("<br/><a href='logout.jsp'>logout</a>");

Following is the body of logout.jsp.

        <h1>Log Out successfully</h1>
        <a href="/Form-Base-Auth-war/FormServlet">home</a>

Other things are reamain unchanged as Basic authentication. We have to add security domain to the jboss-web.xml, need to create two properties files, need to add security constrains as basic authentication. If you miss it you can see Basic authentication in JBOSS.

Session is successfully invalidated in form-based authentication unlike basic authentication. This works in any browser.

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