Mega Code Archive
JaasAuthentication
<![CDATA[
package com.ack.security.jaas;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
/**
* <p> This simple jaas application attempts to authenticate a user
* and reports whether or not the authentication was successful.
*
* <p> To run this you need a couple of things:
* <ul>
* <li> -Djava.security.auth.login.config==ack_jaas.config tells the LoginContext
* which class to use to perform the authentication against, it contains:
* <pre>
* Acknowledge {
* com.ack.security.jaas.module.SimpleLoginModule required debug=true;
* };
* </pre>
*
* <li> you are going to need <code>xxx</code> and
* <code>SimpleLoginModule</code> in your class path
* <li> finally, the <code>JaasLoginCallbackHandler</code> is a class that enables the
* programmer to specify a class that captures the username and password,
* that is used by the authentication implementation, e.g. <code>SimpleLoginModule</code>.
* </ul>
*
*/
public class JaasAuthentication {
public static void main(String[] args) {
// Obtain a LoginContext, needed for authentication. Tell it
// to use the LoginModule implementation specified by the
// entry named "xxx" in the JAAS login configuration
// file and to also use the specified CallbackHandler.
LoginContext lc = null;
try {
lc = new LoginContext("xxx", new JaasLoginCallbackHandler());
}
catch( LoginException le ) {
System.err.println("Cannot create LoginContext. " + le.getMessage());
}
catch( SecurityException se ) {
System.err.println("Cannot create LoginContext. " + se.getMessage());
}
finally {
if( lc == null ) {
System.exit(-1);
}
}
// attempt authentication
try {
lc.login();
System.out.println("Authentication succeeded!");
}
catch( LoginException le ) {
System.err.println("Authentication failed:\n" + " " + le.getMessage());
}
}
}
]]>