org.apache.catalina.authenticator

Class SingleSignOn

java.lang.Object

org.apache.catalina.util.LifecycleBase

org.apache.catalina.util.LifecycleMBeanBase

org.apache.catalina.valves.ValveBase

org.apache.catalina.authenticator.SingleSignOn

All Implemented Interfaces:

MBeanRegistration, Contained, JmxEnabled, Lifecycle, Valve

Direct Known Subclasses:

ClusterSingleSignOn

public class SingleSignOn
extends ValveBase

A Valve that supports a "single sign on" user experience, where the security identity of a user who successfully authenticates to one web application is propagated to other web applications in the same security domain. For successful use, the following requirements must be met:

• This Valve must be configured on the Container that represents a virtual host (typically an implementation of Host).
• The Realm that contains the shared user and role information must be configured on the same Container (or a higher one), and not overridden at the web application level.
• The web applications themselves must use one of the standard Authenticators found in the org.apache.catalina.authenticator package.

Author:

Craig R. McClanahan

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

Lifecycle.SingleUse

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<String,SingleSignOnEntry>	cache The cache of SingleSignOnEntry instances for authenticated Principals, keyed by the cookie value that is used to select them.

Fields inherited from class org.apache.catalina.valves.ValveBase

asyncSupported, container, containerLog, next

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

mserver

Fields inherited from interface org.apache.catalina.Lifecycle

AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors

Constructor and Description
SingleSignOn()

Method Summary

Modifier and Type	Method and Description
protected boolean	associate(String ssoId, Session session) Associate the specified single sign on identifier with the specified Session.
protected void	deregister(String ssoId) Deregister the specified single sign on identifier, and invalidate any associated sessions.
String	getCookieDomain() Returns the optional cookie domain.
boolean	getRequireReauthentication() Gets whether each request needs to be reauthenticated (by an Authenticator downstream in the pipeline) to the security Realm, or if this Valve can itself bind security info to the request based on the presence of a valid SSO entry without rechecking with the Realm.
protected SessionListener	getSessionListener(String ssoId)
void	invoke(Request request, Response response) Perform single-sign-on support processing for this request.
protected boolean	reauthenticate(String ssoId, Realm realm, Request request) Attempts reauthentication to the given Realm using the credentials associated with the single sign-on session identified by argument ssoId.
protected void	register(String ssoId, Principal principal, String authType, String username, String password) Register the specified Principal as being associated with the specified value for the single sign on identifier.
protected void	removeSession(String ssoId, Session session) Remove a single Session from a SingleSignOn.
void	sessionDestroyed(String ssoId, Session session) Process a session destroyed event by removing references to that session from the caches and - if the session destruction is the result of a logout - destroy the associated SSO session.
void	setCookieDomain(String cookieDomain) Sets the domain to be used for sso cookies.
void	setRequireReauthentication(boolean required) Sets whether each request needs to be reauthenticated (by an Authenticator downstream in the pipeline) to the security Realm, or if this Valve can itself bind security info to the request, based on the presence of a valid SSO entry, without rechecking with the Realm.
protected void	startInternal() Start this component and implement the requirements of LifecycleBase.startInternal().
protected void	stopInternal() Stop this component and implement the requirements of LifecycleBase.stopInternal().
protected boolean	update(String ssoId, Principal principal, String authType, String username, String password) Updates any SingleSignOnEntry found under key ssoId with the given authentication data.

Methods inherited from class org.apache.catalina.valves.ValveBase

backgroundProcess, getContainer, getDomainInternal, getNext, getObjectNameKeyProperties, initInternal, isAsyncSupported, setAsyncSupported, setContainer, setNext, toString

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase

addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected Map<String,SingleSignOnEntry> cache

The cache of SingleSignOnEntry instances for authenticated Principals, keyed by the cookie value that is used to select them.

Constructor Detail

SingleSignOn

public SingleSignOn()

Method Detail

getCookieDomain

public String getCookieDomain()

Returns the optional cookie domain. May return null.

Returns:

The cookie domain

setCookieDomain

public void setCookieDomain(String cookieDomain)

Sets the domain to be used for sso cookies.

Parameters:

cookieDomain - cookie domain name

getRequireReauthentication

public boolean getRequireReauthentication()

Gets whether each request needs to be reauthenticated (by an Authenticator downstream in the pipeline) to the security Realm, or if this Valve can itself bind security info to the request based on the presence of a valid SSO entry without rechecking with the Realm.

Returns:

true if it is required that a downstream Authenticator reauthenticate each request before calls to HttpServletRequest.setUserPrincipal() and HttpServletRequest.setAuthType() are made; false if the Valve can itself make those calls relying on the presence of a valid SingleSignOn entry associated with the request.

See Also:

setRequireReauthentication(boolean)

setRequireReauthentication

public void setRequireReauthentication(boolean required)

Sets whether each request needs to be reauthenticated (by an Authenticator downstream in the pipeline) to the security Realm, or if this Valve can itself bind security info to the request, based on the presence of a valid SSO entry, without rechecking with the Realm.

If this property is false (the default), this Valve will bind a UserPrincipal and AuthType to the request if a valid SSO entry is associated with the request. It will not notify the security Realm of the incoming request.

This property should be set to true if the overall server configuration requires that the Realm reauthenticate each request thread. An example of such a configuration would be one where the Realm implementation provides security for both a web tier and an associated EJB tier, and needs to set security credentials on each request thread in order to support EJB access.

If this property is set to true, this Valve will set flags on the request notifying the downstream Authenticator that the request is associated with an SSO session. The Authenticator will then call its reauthenticateFromSSO method to attempt to reauthenticate the request to the Realm, using any credentials that were cached with this Valve.

The default value of this property is false, in order to maintain backward compatibility with previous versions of Tomcat.

Parameters:

required - true if it is required that a downstream Authenticator reauthenticate each request before calls to HttpServletRequest.setUserPrincipal() and HttpServletRequest.setAuthType() are made; false if the Valve can itself make those calls relying on the presence of a valid SingleSignOn entry associated with the request.

See Also:

AuthenticatorBase.reauthenticateFromSSO(java.lang.String, org.apache.catalina.connector.Request)

invoke

public void invoke(Request request,
                   Response response)
            throws IOException,
                   ServletException

Perform single-sign-on support processing for this request.

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating

Throws:

IOException - if an input/output error occurs

ServletException - if a servlet error occurs

sessionDestroyed

public void sessionDestroyed(String ssoId,
                             Session session)

Process a session destroyed event by removing references to that session from the caches and - if the session destruction is the result of a logout - destroy the associated SSO session.

Parameters:

ssoId - The ID of the SSO session which which the destroyed session was associated

session - The session that has been destroyed

associate

protected boolean associate(String ssoId,
                            Session session)

Associate the specified single sign on identifier with the specified Session.

Parameters:

ssoId - Single sign on identifier

session - Session to be associated

Returns:

true if the session was associated to the given SSO session, otherwise false

deregister

protected void deregister(String ssoId)

Deregister the specified single sign on identifier, and invalidate any associated sessions.

Parameters:

ssoId - Single sign on identifier to deregister

reauthenticate

protected boolean reauthenticate(String ssoId,
                                 Realm realm,
                                 Request request)

Attempts reauthentication to the given Realm using the credentials associated with the single sign-on session identified by argument ssoId.

If reauthentication is successful, the Principal and authorization type associated with the SSO session will be bound to the given Request object via calls to Request.setAuthType() and Request.setUserPrincipal()

Parameters:

ssoId - identifier of SingleSignOn session with which the caller is associated

realm - Realm implementation against which the caller is to be authenticated

request - the request that needs to be authenticated

Returns:

true if reauthentication was successful, false otherwise.

register

protected void register(String ssoId,
                        Principal principal,
                        String authType,
                        String username,
                        String password)

Register the specified Principal as being associated with the specified value for the single sign on identifier.

Parameters:

ssoId - Single sign on identifier to register

principal - Associated user principal that is identified

authType - Authentication type used to authenticate this user principal

username - Username used to authenticate this user

password - Password used to authenticate this user

update

protected boolean update(String ssoId,
                         Principal principal,
                         String authType,
                         String username,
                         String password)

Updates any SingleSignOnEntry found under key ssoId with the given authentication data.

The purpose of this method is to allow an SSO entry that was established without a username/password combination (i.e. established following DIGEST or CLIENT_CERT authentication) to be updated with a username and password if one becomes available through a subsequent BASIC or FORM authentication. The SSO entry will then be usable for reauthentication.

NOTE: Only updates the SSO entry if a call to SingleSignOnEntry.getCanReauthenticate() returns false; otherwise, it is assumed that the SSO entry already has sufficient information to allow reauthentication and that no update is needed.

Parameters:

ssoId - identifier of Single sign to be updated

principal - the Principal returned by the latest call to Realm.authenticate.

authType - the type of authenticator used (BASIC, CLIENT_CERT, DIGEST or FORM)

username - the username (if any) used for the authentication

password - the password (if any) used for the authentication

Returns:

true if the credentials were updated, otherwise false

removeSession

protected void removeSession(String ssoId,
                             Session session)

Remove a single Session from a SingleSignOn. Called when a session is timed out and no longer active.

Parameters:

ssoId - Single sign on identifier from which to remove the session.

session - the session to be removed.

getSessionListener

protected SessionListener getSessionListener(String ssoId)

startInternal

protected void startInternal()
                      throws LifecycleException

Description copied from class: ValveBase

Start this component and implement the requirements of LifecycleBase.startInternal().

Overrides:

startInternal in class ValveBase

Throws:

LifecycleException - if this component detects a fatal error that prevents this component from being used

stopInternal

protected void stopInternal()
                     throws LifecycleException

Description copied from class: ValveBase

Stop this component and implement the requirements of LifecycleBase.stopInternal().

Overrides:

stopInternal in class ValveBase

Throws:

LifecycleException - if this component detects a fatal error that prevents this component from being used