org.springframework.security.web.authentication.preauth
Class RequestHeaderAuthenticationFilter

java.lang.Object
  org.springframework.web.filter.GenericFilterBean
      org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter
          org.springframework.security.web.authentication.preauth.RequestHeaderAuthenticationFilter

All Implemented Interfaces:

javax.servlet.Filter, BeanNameAware, DisposableBean, InitializingBean, ApplicationEventPublisherAware, ServletContextAware

public class RequestHeaderAuthenticationFilter
extends AbstractPreAuthenticatedProcessingFilter

A simple pre-authenticated filter which obtains the username from a request header, for use with systems such as CA Siteminder.

As with most pre-authenticated scenarios, it is essential that the external authentication system is set up correctly as this filter does no authentication whatsoever. All the protection is assumed to be provided externally and if this filter is included inappropriately in a configuration, it would be possible to assume the identity of a user merely by setting the correct header name. This also means it should not generally be used in combination with other Spring Security authentication mechanisms such as form login, as this would imply there was a means of bypassing the external system which would be risky.

The property principalRequestHeader is the name of the request header that contains the username. It defaults to "SM_USER" for compatibility with Siteminder.

If the header is missing from the request, getPreAuthenticatedPrincipal will throw an exception. You can override this behaviour by setting the exceptionIfHeaderMissing property.

Since:

2.0

Field Summary

Fields inherited from class org.springframework.web.filter.GenericFilterBean

logger

Constructor Summary

RequestHeaderAuthenticationFilter()

Method Summary

protected Object	getPreAuthenticatedCredentials(javax.servlet.http.HttpServletRequest request) Credentials aren't usually applicable, but if a credentialsRequestHeader is set, this will be read and used as the credentials value.
protected Object	getPreAuthenticatedPrincipal(javax.servlet.http.HttpServletRequest request) Read and returns the header named by principalRequestHeader from the request.
void	setCredentialsRequestHeader(String credentialsRequestHeader)
void	setExceptionIfHeaderMissing(boolean exceptionIfHeaderMissing) Defines whether an exception should be raised if the principal header is missing.
void	setPrincipalRequestHeader(String principalRequestHeader)

Methods inherited from class org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter

afterPropertiesSet, doFilter, setApplicationEventPublisher, setAuthenticationDetailsSource, setAuthenticationManager, setCheckForPrincipalChanges, setContinueFilterChainOnUnsuccessfulAuthentication, setInvalidateSessionOnPrincipalChange, successfulAuthentication, unsuccessfulAuthentication

Methods inherited from class org.springframework.web.filter.GenericFilterBean

addRequiredProperty, destroy, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setServletContext

Methods inherited from class java.lang.Object

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

Constructor Detail

RequestHeaderAuthenticationFilter

public RequestHeaderAuthenticationFilter()

Method Detail

getPreAuthenticatedPrincipal

protected Object getPreAuthenticatedPrincipal(javax.servlet.http.HttpServletRequest request)

Read and returns the header named by principalRequestHeader from the request.

Specified by:

getPreAuthenticatedPrincipal in class AbstractPreAuthenticatedProcessingFilter

Throws:

PreAuthenticatedCredentialsNotFoundException - if the header is missing and exceptionIfHeaderMissing is set to true.

getPreAuthenticatedCredentials

protected Object getPreAuthenticatedCredentials(javax.servlet.http.HttpServletRequest request)

Credentials aren't usually applicable, but if a credentialsRequestHeader is set, this will be read and used as the credentials value. Otherwise a dummy value will be used.

Specified by:

getPreAuthenticatedCredentials in class AbstractPreAuthenticatedProcessingFilter

setPrincipalRequestHeader

public void setPrincipalRequestHeader(String principalRequestHeader)

setCredentialsRequestHeader

public void setCredentialsRequestHeader(String credentialsRequestHeader)

setExceptionIfHeaderMissing

public void setExceptionIfHeaderMissing(boolean exceptionIfHeaderMissing)

Defines whether an exception should be raised if the principal header is missing. Defaults to true.

Parameters:

exceptionIfHeaderMissing - set to false to override the default behaviour and allow the request to proceed if no header is found.