org.springframework.security.web.authentication.preauth
Classes 
AbstractPreAuthenticatedProcessingFilter
PreAuthenticatedAuthenticationProvider
PreAuthenticatedAuthenticationToken
PreAuthenticatedGrantedAuthoritiesAuthenticationDetails
PreAuthenticatedGrantedAuthoritiesUserDetailsService
PreAuthenticatedGrantedAuthoritiesWebAuthenticationDetails
PreAuthenticatedProcessingFilterEntryPoint
RequestHeaderAuthenticationFilter
Exceptions 
PreAuthenticatedCredentialsNotFoundException