org.springframework.security.web.authentication.session
Class ChangeSessionIdAuthenticationStrategy

java.lang.Object
  org.springframework.security.web.authentication.session.ChangeSessionIdAuthenticationStrategy

All Implemented Interfaces:

Aware, ApplicationEventPublisherAware, SessionAuthenticationStrategy

public final class ChangeSessionIdAuthenticationStrategy
extends Object

Uses HttpServletRequest#changeSessionId() to protect against session fixation attacks. This is the default implementation for Servlet 3.1+.

Since:

3.2

Nested Class Summary

protected static class

org.springframework.security.web.authentication.session.AbstractSessionFixationProtectionStrategy.NullEventPublisher

Field Summary

protected org.apache.commons.logging.Log

logger

Constructor Summary

ChangeSessionIdAuthenticationStrategy()

Method Summary

void	onAuthentication(Authentication authentication, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Called when a user is newly authenticated.
protected void	onSessionChange(String originalSessionId, javax.servlet.http.HttpSession newSession, Authentication auth) Called when the session has been changed and the old attributes have been migrated to the new session.
void	setAlwaysCreateSession(boolean alwaysCreateSession)
void	setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) Sets the ApplicationEventPublisher to use for submitting SessionFixationProtectionEvent.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

logger

protected final org.apache.commons.logging.Log logger

Constructor Detail

ChangeSessionIdAuthenticationStrategy

public ChangeSessionIdAuthenticationStrategy()

Method Detail

onAuthentication

public void onAuthentication(Authentication authentication,
                             javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response)

Called when a user is newly authenticated.

If a session already exists, and matches the session Id from the client, a new session will be created, and the session attributes copied to it (if migrateSessionAttributes is set). If the client's requested session Id is invalid, nothing will be done, since there is no need to change the session Id if it doesn't match the current session.

If there is no session, no action is taken unless the alwaysCreateSession property is set, in which case a session will be created if one doesn't already exist.

Specified by:

onAuthentication in interface SessionAuthenticationStrategy

onSessionChange

protected void onSessionChange(String originalSessionId,
                               javax.servlet.http.HttpSession newSession,
                               Authentication auth)

Called when the session has been changed and the old attributes have been migrated to the new session. Only called if a session existed to start with. Allows subclasses to plug in additional behaviour. *

The default implementation of this method publishes a SessionFixationProtectionEvent to notify the application that the session ID has changed. If you override this method and still wish these events to be published, you should call super.onSessionChange() within your overriding method.

Parameters:

originalSessionId - the original session identifier

newSession - the newly created session

auth - the token for the newly authenticated principal

setApplicationEventPublisher

public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher)

Sets the ApplicationEventPublisher to use for submitting SessionFixationProtectionEvent. The default is to not submit the SessionFixationProtectionEvent.

Specified by:

setApplicationEventPublisher in interface ApplicationEventPublisherAware

Parameters:

applicationEventPublisher - the ApplicationEventPublisher. Cannot be null.

setAlwaysCreateSession

public void setAlwaysCreateSession(boolean alwaysCreateSession)