org.acegisecurity.ui.cas
Class CasProcessingFilter

java.lang.Object
  org.acegisecurity.ui.AbstractProcessingFilter
      org.acegisecurity.ui.cas.CasProcessingFilter

All Implemented Interfaces:

javax.servlet.Filter, InitializingBean, ApplicationEventPublisherAware, MessageSourceAware

public class CasProcessingFilter
extends AbstractProcessingFilter

Processes a CAS service ticket.

A service ticket consists of an opaque ticket string. It arrives at this filter by the user's browser successfully authenticating using CAS, and then receiving a HTTP redirect to a service. The opaque ticket string is presented in the ticket request parameter. This filter monitors the service URL so it can receive the service ticket and process it. The CAS server knows which service URL to use via the ServiceProperties.getService() method.

Processing the service ticket involves creating a UsernamePasswordAuthenticationToken which uses CAS_STATEFUL_IDENTIFIER for the principal and the opaque ticket string as the credentials.

The configured AuthenticationManager is expected to provide a provider that can recognise UsernamePasswordAuthenticationTokens containing this special principal name, and process them accordingly by validation with the CAS server.

Do not use this class directly. Instead configure web.xml to use the FilterToBeanProxy.

Version:

$Id: CasProcessingFilter.java,v 1.6 2005/11/17 00:55:49 benalex Exp $

Author:

Ben Alex

Field Summary

static String	CAS_STATEFUL_IDENTIFIER Used to identify a CAS request for a stateful user agent, such as a web browser.
static String	CAS_STATELESS_IDENTIFIER Used to identify a CAS request for a stateless user agent, such as a remoting protocol client (eg Hessian, Burlap, SOAP etc).

Fields inherited from class org.acegisecurity.ui.AbstractProcessingFilter

ACEGI_SECURITY_LAST_EXCEPTION_KEY, ACEGI_SECURITY_TARGET_URL_KEY, logger, messages

Constructor Summary

CasProcessingFilter()

Method Summary

Authentication	attemptAuthentication(javax.servlet.http.HttpServletRequest request) Performs actual authentication.
String	getDefaultFilterProcessesUrl() This filter by default responds to /j_acegi_cas_security_check.
void	init(javax.servlet.FilterConfig filterConfig) Does nothing.

Methods inherited from class org.acegisecurity.ui.AbstractProcessingFilter

afterPropertiesSet, destroy, doFilter, getAuthenticationFailureUrl, getAuthenticationManager, getDefaultTargetUrl, getExceptionMappings, getFilterProcessesUrl, getRememberMeServices, isAlwaysUseDefaultTargetUrl, isContinueChainBeforeSuccessfulAuthentication, onPreAuthentication, onSuccessfulAuthentication, onUnsuccessfulAuthentication, requiresAuthentication, setAlwaysUseDefaultTargetUrl, setApplicationEventPublisher, setAuthenticationFailureUrl, setAuthenticationManager, setContinueChainBeforeSuccessfulAuthentication, setDefaultTargetUrl, setExceptionMappings, setFilterProcessesUrl, setMessageSource, setRememberMeServices, successfulAuthentication, unsuccessfulAuthentication

Methods inherited from class java.lang.Object

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

Field Detail

CAS_STATEFUL_IDENTIFIER

public static final String CAS_STATEFUL_IDENTIFIER

Used to identify a CAS request for a stateful user agent, such as a web browser.

See Also:

Constant Field Values

CAS_STATELESS_IDENTIFIER

public static final String CAS_STATELESS_IDENTIFIER

Used to identify a CAS request for a stateless user agent, such as a remoting protocol client (eg Hessian, Burlap, SOAP etc). Results in a more aggressive caching strategy being used, as the absence of a HttpSession will result in a new authentication attempt on every request.

See Also:

Constant Field Values

Constructor Detail

CasProcessingFilter

public CasProcessingFilter()

Method Detail

getDefaultFilterProcessesUrl

public String getDefaultFilterProcessesUrl()

This filter by default responds to /j_acegi_cas_security_check.

Specified by:

getDefaultFilterProcessesUrl in class AbstractProcessingFilter

Returns:

the default

attemptAuthentication

public Authentication attemptAuthentication(javax.servlet.http.HttpServletRequest request)
                                     throws AuthenticationException

Description copied from class: AbstractProcessingFilter

Performs actual authentication.

Specified by:

attemptAuthentication in class AbstractProcessingFilter

Parameters:

request - from which to extract parameters and perform the authentication

Returns:

the authenticated user

Throws:

AuthenticationException - if authentication fails

init

public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException

Description copied from class: AbstractProcessingFilter

Does nothing. We use IoC container lifecycle services instead.

Specified by:

init in interface javax.servlet.Filter

Overrides:

init in class AbstractProcessingFilter

Parameters:

filterConfig - ignored

Throws:

javax.servlet.ServletException - ignored