org.apache.catalina.authenticator

Class AuthenticatorBase

java.lang.Object

org.apache.catalina.util.LifecycleBase

org.apache.catalina.util.LifecycleMBeanBase

org.apache.catalina.valves.ValveBase

org.apache.catalina.authenticator.AuthenticatorBase

All Implemented Interfaces:

MBeanRegistration, RegistrationListener, Authenticator, Contained, JmxEnabled, Lifecycle, Valve

Direct Known Subclasses:

BasicAuthenticator, DigestAuthenticator, FormAuthenticator, NonLoginAuthenticator, SpnegoAuthenticator, SSLAuthenticator

public abstract class AuthenticatorBase
extends ValveBase
implements Authenticator, RegistrationListener

Basic implementation of the Valve interface that enforces the <security-constraint> elements in the web application deployment descriptor. This functionality is implemented as a Valve so that it can be omitted in environments that do not require these features. Individual implementations of each supported authentication method can subclass this base class as required.

USAGE CONSTRAINT: When this class is utilized, the Context to which it is attached (or a parent Container in a hierarchy) must have an associated Realm that can be used for authenticating users and enumerating the roles to which they have been assigned.

USAGE CONSTRAINT: This Valve is only useful when processing HTTP requests. Requests of any other type will simply be passed through.

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 boolean	alwaysUseSession Should a session always be used once a user is authenticated?
protected static String	AUTH_HEADER_NAME Authentication header
protected boolean	cache Should we cache authenticated Principals if the request is part of an HTTP session?
protected boolean	changeSessionIdOnAuthentication Should the session ID, if any, be changed upon a successful authentication to prevent a session fixation attack?
protected Context	context The Context to which this Valve is attached.
protected boolean	disableProxyCaching Flag to determine if we disable proxy caching, or leave the issue up to the webapp developer.
protected static String	REALM_NAME Default authentication realm name.
protected boolean	securePagesWithPragma Flag to determine if we disable proxy caching with headers incompatible with IE.
protected String	secureRandomAlgorithm The name of the algorithm to use to create instances of SecureRandom which are used to generate SSO session IDs.
protected String	secureRandomClass The Java class name of the secure random number generator class to be used when generating SSO session identifiers.
protected String	secureRandomProvider The name of the provider to use to create instances of SecureRandom which are used to generate session SSO IDs.
protected SessionIdGeneratorBase	sessionIdGenerator
protected static StringManager	sm The string manager for this package.
protected SingleSignOn	sso The SingleSignOn implementation in our request processing chain, if there is one.

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
AuthenticatorBase()

Method Summary

Modifier and Type	Method and Description
protected void	associate(String ssoId, Session session) Associate the specified single sign on identifier with the specified Session.
protected boolean	checkForCachedAuthentication(Request request, HttpServletResponse response, boolean useSSO) Check to see if the user has already been authenticated earlier in the processing chain or if there is enough information available to authenticate the user without requiring further user interaction.
protected Principal	doLogin(Request request, String username, String password) Process the login request.
boolean	getAlwaysUseSession()
protected abstract String	getAuthMethod()
boolean	getCache() Return the cache authenticated Principals flag.
boolean	getChangeSessionIdOnAuthentication() Return the flag that states if we should change the session ID of an existing session upon successful authentication.
Container	getContainer() Return the Container to which this Valve is attached.
boolean	getDisableProxyCaching() Return the flag that states if we add headers to disable caching by proxies.
protected static String	getRealmName(Context context)
protected X509Certificate[]	getRequestCertificates(Request request) Look for the X509 certificate chain in the Request under the key javax.servlet.request.X509Certificate.
boolean	getSecurePagesWithPragma() Return the flag that states, if proxy caching is disabled, what headers we add to disable the caching.
String	getSecureRandomAlgorithm() Return the secure random number generator algorithm name.
String	getSecureRandomClass() Return the secure random number generator class name.
String	getSecureRandomProvider() Return the secure random number generator provider name.
void	invoke(Request request, Response response) Enforce the security restrictions in the web application deployment descriptor of our associated Context.
void	login(String username, String password, Request request)
void	logout(Request request)
void	notify(String layer, String appContext)
protected boolean	reauthenticateFromSSO(String ssoId, Request request) Attempts reauthentication to the Realm using the credentials included in argument entry.
void	register(Request request, HttpServletResponse response, Principal principal, String authType, String username, String password) Register an authenticated Principal and authentication type in our request, in the current session (if there is one), and with our SingleSignOn valve, if there is one.
void	setAlwaysUseSession(boolean alwaysUseSession)
void	setCache(boolean cache) Set the cache authenticated Principals flag.
void	setChangeSessionIdOnAuthentication(boolean changeSessionIdOnAuthentication) Set the value of the flag that states if we should change the session ID of an existing session upon successful authentication.
void	setContainer(Container container) Set the Container to which this Valve is attached.
void	setDisableProxyCaching(boolean nocache) Set the value of the flag that states if we add headers to disable caching by proxies.
void	setSecurePagesWithPragma(boolean securePagesWithPragma) Set the value of the flag that states what headers we add to disable proxy caching.
void	setSecureRandomAlgorithm(String secureRandomAlgorithm) Set the secure random number generator algorithm name.
void	setSecureRandomClass(String secureRandomClass) Set the secure random number generator class name.
void	setSecureRandomProvider(String secureRandomProvider) Set the secure random number generator provider name.
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().

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

backgroundProcess, getDomainInternal, getNext, getObjectNameKeyProperties, initInternal, isAsyncSupported, setAsyncSupported, 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

Methods inherited from interface org.apache.catalina.Authenticator

authenticate

Field Detail

sm

protected static final StringManager sm

The string manager for this package.

AUTH_HEADER_NAME

protected static final String AUTH_HEADER_NAME

Authentication header

See Also:

Constant Field Values

REALM_NAME

protected static final String REALM_NAME

Default authentication realm name.

See Also:

Constant Field Values

alwaysUseSession

protected boolean alwaysUseSession

Should a session always be used once a user is authenticated? This may offer some performance benefits since the session can then be used to cache the authenticated Principal, hence removing the need to authenticate the user via the Realm on every request. This may be of help for combinations such as BASIC authentication used with the JNDIRealm or DataSourceRealms. However there will also be the performance cost of creating and GC'ing the session. By default, a session will not be created.

cache

protected boolean cache

Should we cache authenticated Principals if the request is part of an HTTP session?

changeSessionIdOnAuthentication

protected boolean changeSessionIdOnAuthentication

Should the session ID, if any, be changed upon a successful authentication to prevent a session fixation attack?

context

protected Context context

The Context to which this Valve is attached.

disableProxyCaching

protected boolean disableProxyCaching

Flag to determine if we disable proxy caching, or leave the issue up to the webapp developer.

securePagesWithPragma

protected boolean securePagesWithPragma

Flag to determine if we disable proxy caching with headers incompatible with IE.

secureRandomClass

protected String secureRandomClass

The Java class name of the secure random number generator class to be used when generating SSO session identifiers. The random number generator class must be self-seeding and have a zero-argument constructor. If not specified, an instance of SecureRandom will be generated.

secureRandomAlgorithm

protected String secureRandomAlgorithm

The name of the algorithm to use to create instances of SecureRandom which are used to generate SSO session IDs. If no algorithm is specified, SHA1PRNG is used. To use the platform default (which may be SHA1PRNG), specify the empty string. If an invalid algorithm and/or provider is specified the SecureRandom instances will be created using the defaults. If that fails, the SecureRandom instances will be created using platform defaults.

secureRandomProvider

protected String secureRandomProvider

The name of the provider to use to create instances of SecureRandom which are used to generate session SSO IDs. If no algorithm is specified the of SHA1PRNG default is used. If an invalid algorithm and/or provider is specified the SecureRandom instances will be created using the defaults. If that fails, the SecureRandom instances will be created using platform defaults.

sessionIdGenerator

protected SessionIdGeneratorBase sessionIdGenerator

sso

protected SingleSignOn sso

The SingleSignOn implementation in our request processing chain, if there is one.

Constructor Detail

AuthenticatorBase

public AuthenticatorBase()

Method Detail

getRealmName

protected static String getRealmName(Context context)

getAlwaysUseSession

public boolean getAlwaysUseSession()

setAlwaysUseSession

public void setAlwaysUseSession(boolean alwaysUseSession)

getCache

public boolean getCache()

Return the cache authenticated Principals flag.

Returns:

true if authenticated Principals will be cached, otherwise false

setCache

public void setCache(boolean cache)

Set the cache authenticated Principals flag.

Parameters:

cache - The new cache flag

getContainer

public Container getContainer()

Return the Container to which this Valve is attached.

Specified by:

getContainer in interface Contained

Overrides:

getContainer in class ValveBase

Returns:

The Container with which this instance is associated or null if not associated with a Container

setContainer

public void setContainer(Container container)

Set the Container to which this Valve is attached.

Specified by:

setContainer in interface Contained

Overrides:

setContainer in class ValveBase

Parameters:

container - The container to which we are attached

getDisableProxyCaching

public boolean getDisableProxyCaching()

Return the flag that states if we add headers to disable caching by proxies.

Returns:

true if the headers will be added, otherwise false

setDisableProxyCaching

public void setDisableProxyCaching(boolean nocache)

Set the value of the flag that states if we add headers to disable caching by proxies.

Parameters:

nocache - true if we add headers to disable proxy caching, false if we leave the headers alone.

getSecurePagesWithPragma

public boolean getSecurePagesWithPragma()

Return the flag that states, if proxy caching is disabled, what headers we add to disable the caching.

Returns:

true if a Pragma header should be used, otherwise false

setSecurePagesWithPragma

public void setSecurePagesWithPragma(boolean securePagesWithPragma)

Set the value of the flag that states what headers we add to disable proxy caching.

Parameters:

securePagesWithPragma - true if we add headers which are incompatible with downloading office documents in IE under SSL but which fix a caching problem in Mozilla.

getChangeSessionIdOnAuthentication

public boolean getChangeSessionIdOnAuthentication()

Return the flag that states if we should change the session ID of an existing session upon successful authentication.

Returns:

true to change session ID upon successful authentication, false to do not perform the change.

setChangeSessionIdOnAuthentication

public void setChangeSessionIdOnAuthentication(boolean changeSessionIdOnAuthentication)

Set the value of the flag that states if we should change the session ID of an existing session upon successful authentication.

Parameters:

changeSessionIdOnAuthentication - true to change session ID upon successful authentication, false to do not perform the change.

getSecureRandomClass

public String getSecureRandomClass()

Return the secure random number generator class name.

Returns:

The fully qualified name of the SecureRandom implementation to use

setSecureRandomClass

public void setSecureRandomClass(String secureRandomClass)

Set the secure random number generator class name.

Parameters:

secureRandomClass - The new secure random number generator class name

getSecureRandomAlgorithm

public String getSecureRandomAlgorithm()

Return the secure random number generator algorithm name.

Returns:

The name of the SecureRandom algorithm used

setSecureRandomAlgorithm

public void setSecureRandomAlgorithm(String secureRandomAlgorithm)

Set the secure random number generator algorithm name.

Parameters:

secureRandomAlgorithm - The new secure random number generator algorithm name

getSecureRandomProvider

public String getSecureRandomProvider()

Return the secure random number generator provider name.

Returns:

The name of the SecureRandom provider

setSecureRandomProvider

public void setSecureRandomProvider(String secureRandomProvider)

Set the secure random number generator provider name.

Parameters:

secureRandomProvider - The new secure random number generator provider name

invoke

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

Enforce the security restrictions in the web application deployment descriptor of our associated Context.

Specified by:

invoke in interface Valve

Parameters:

request - Request to be processed

response - Response to be processed

Throws:

IOException - if an input/output error occurs

ServletException - if thrown by a processing element

getRequestCertificates

protected X509Certificate[] getRequestCertificates(Request request)
                                            throws IllegalStateException

Look for the X509 certificate chain in the Request under the key javax.servlet.request.X509Certificate. If not found, trigger extracting the certificate chain from the Coyote request.

Parameters:

request - Request to be processed

Returns:

The X509 certificate chain if found, null otherwise.

Throws:

IllegalStateException

associate

protected void 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

checkForCachedAuthentication

protected boolean checkForCachedAuthentication(Request request,
                                               HttpServletResponse response,
                                               boolean useSSO)

Check to see if the user has already been authenticated earlier in the processing chain or if there is enough information available to authenticate the user without requiring further user interaction.

Parameters:

request - The current request

response - The current response

useSSO - Should information available from SSO be used to attempt to authenticate the current user?

Returns:

true if the user was authenticated via the cache, otherwise false

reauthenticateFromSSO

protected boolean reauthenticateFromSSO(String ssoId,
                                        Request request)

Attempts reauthentication to the Realm using the credentials included in argument entry.

Parameters:

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

request - the request that needs to be authenticated

Returns:

true if the reauthentication from SSL occurred

register

public void register(Request request,
                     HttpServletResponse response,
                     Principal principal,
                     String authType,
                     String username,
                     String password)

Register an authenticated Principal and authentication type in our request, in the current session (if there is one), and with our SingleSignOn valve, if there is one. Set the appropriate cookie to be returned.

Parameters:

request - The servlet request we are processing

response - The servlet response we are generating

principal - The authenticated Principal to be registered

authType - The authentication type to be registered

username - Username used to authenticate (if any)

password - Password used to authenticate (if any)

login

public void login(String username,
                  String password,
                  Request request)
           throws ServletException

Specified by:

login in interface Authenticator

Throws:

ServletException

getAuthMethod

protected abstract String getAuthMethod()

doLogin

protected Principal doLogin(Request request,
                            String username,
                            String password)
                     throws ServletException

Process the login request.

Parameters:

request - Associated request

username - The user

password - The password

Returns:

The authenticated Principal

Throws:

ServletException - No principal was authenticated with the specified credentials

logout

public void logout(Request request)

Specified by:

logout in interface Authenticator

startInternal

protected void startInternal()
                      throws LifecycleException

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

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

notify

public void notify(String layer,
                   String appContext)

Specified by:

notify in interface RegistrationListener