org.acegisecurity.intercept.AbstractSecurityInterceptor Maven / Gradle / Ivy
/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.acegisecurity.intercept;
import org.acegisecurity.AccessDecisionManager;
import org.acegisecurity.AccessDeniedException;
import org.acegisecurity.AcegiMessageSource;
import org.acegisecurity.AfterInvocationManager;
import org.acegisecurity.Authentication;
import org.acegisecurity.AuthenticationCredentialsNotFoundException;
import org.acegisecurity.AuthenticationException;
import org.acegisecurity.AuthenticationManager;
import org.acegisecurity.ConfigAttribute;
import org.acegisecurity.ConfigAttributeDefinition;
import org.acegisecurity.RunAsManager;
import org.acegisecurity.context.SecurityContextHolder;
import org.acegisecurity.event.authorization.AuthenticationCredentialsNotFoundEvent;
import org.acegisecurity.event.authorization.AuthorizationFailureEvent;
import org.acegisecurity.event.authorization.AuthorizedEvent;
import org.acegisecurity.event.authorization.PublicInvocationEvent;
import org.acegisecurity.runas.NullRunAsManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.context.MessageSource;
import org.springframework.context.MessageSourceAware;
import org.springframework.context.support.MessageSourceAccessor;
import org.springframework.util.Assert;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* Abstract class that implements security interception for secure objects.The
* AbstractSecurityInterceptor will ensure the proper startup configuration of the security interceptor.
* It will also implement the proper handling of secure object invocations, being:
*
* - Obtain the {@link Authentication} object from the {@link SecurityContextHolder}.
* - Determine if the request relates to a secured or public invocation by looking up the secure object
* request against the {@link ObjectDefinitionSource}.
* - For an invocation that is secured (there is a
ConfigAttributeDefinition for the secure
* object invocation):
*
* - If either the {@link org.acegisecurity.Authentication#isAuthenticated()} returns
*
false, or the {@link #alwaysReauthenticate} is true, authenticate the request
* against the configured {@link AuthenticationManager}. When authenticated, replace the
* Authentication object on the SecurityContextHolder with the returned value.
* - Authorize the request against the configured {@link AccessDecisionManager}.
* - Perform any run-as replacement via the configured {@link RunAsManager}.
* - Pass control back to the concrete subclass, which will actually proceed with executing the
* object. A {@link InterceptorStatusToken} is returned so that after the subclass has finished proceeding
* with execution of the object, its finally clause can ensure the
AbstractSecurityInterceptor
* is re-called and tidies up correctly.
* - The concrete subclass will re-call the
AbstractSecurityInterceptor via the
* {@link #afterInvocation(InterceptorStatusToken, Object)} method.
* - If the
RunAsManager replaced the Authentication object, return
* the SecurityContextHolder to the object that existed after the call to
* AuthenticationManager.
* - If an
AfterInvocationManager is defined, invoke the invocation manager and
* allow it to replace the object due to be returned to the caller.
*
*
* - For an invocation that is public (there is no
ConfigAttributeDefinition for the secure
* object invocation):
*
* - As described above, the concrete subclass will be returned an
*
InterceptorStatusToken which is subsequently re-presented to the
* AbstractSecurityInterceptor after the secure object has been executed. The
* AbstractSecurityInterceptor will take no further action when its {@link
* #afterInvocation(InterceptorStatusToken, Object)} is called.
*
*
* - Control again returns to the concrete subclass, along with the
Object that should be
* returned to the caller. The subclass will then return that result or exception to the original caller.
*
*
*
* @author Ben Alex
* @version $Id: AbstractSecurityInterceptor.java 1496 2006-05-23 13:38:33Z benalex $
*/
public abstract class AbstractSecurityInterceptor implements InitializingBean, ApplicationEventPublisherAware,
MessageSourceAware {
//~ Static fields/initializers =====================================================================================
protected static final Log logger = LogFactory.getLog(AbstractSecurityInterceptor.class);
//~ Instance fields ================================================================================================
private AccessDecisionManager accessDecisionManager;
private AfterInvocationManager afterInvocationManager;
private ApplicationEventPublisher eventPublisher;
private AuthenticationManager authenticationManager;
protected MessageSourceAccessor messages = AcegiMessageSource.getAccessor();
private RunAsManager runAsManager = new NullRunAsManager();
private boolean alwaysReauthenticate = false;
private boolean rejectPublicInvocations = false;
private boolean validateConfigAttributes = true;
//~ Methods ========================================================================================================
/**
* Completes the work of the AbstractSecurityInterceptor after the secure object invocation
* has been complete
*
* @param token as returned by the {@link #beforeInvocation(Object)}} method
* @param returnedObject any object returned from the secure object invocation (may benull)
*
* @return the object the secure object invocation should ultimately return to its caller (may be
* null)
*/
protected Object afterInvocation(InterceptorStatusToken token, Object returnedObject) {
if (token == null) {
// public object
return returnedObject;
}
if (token.isContextHolderRefreshRequired()) {
if (logger.isDebugEnabled()) {
logger.debug("Reverting to original Authentication: " + token.getAuthentication().toString());
}
SecurityContextHolder.getContext().setAuthentication(token.getAuthentication());
}
if (afterInvocationManager != null) {
returnedObject = afterInvocationManager.decide(token.getAuthentication(), token.getSecureObject(),
token.getAttr(), returnedObject);
}
return returnedObject;
}
public void afterPropertiesSet() throws Exception {
Assert.notNull(getSecureObjectClass(), "Subclass must provide a non-null response to getSecureObjectClass()");
Assert.notNull(this.messages, "A message source must be set");
Assert.notNull(this.authenticationManager, "An AuthenticationManager is required");
Assert.notNull(this.accessDecisionManager, "An AccessDecisionManager is required");
Assert.notNull(this.runAsManager, "A RunAsManager is required");
Assert.notNull(this.obtainObjectDefinitionSource(), "An ObjectDefinitionSource is required");
Assert.isTrue(this.obtainObjectDefinitionSource().supports(getSecureObjectClass()),
"ObjectDefinitionSource does not support secure object class: " + getSecureObjectClass());
Assert.isTrue(this.runAsManager.supports(getSecureObjectClass()),
"RunAsManager does not support secure object class: " + getSecureObjectClass());
Assert.isTrue(this.accessDecisionManager.supports(getSecureObjectClass()),
"AccessDecisionManager does not support secure object class: " + getSecureObjectClass());
if (this.afterInvocationManager != null) {
Assert.isTrue(this.afterInvocationManager.supports(getSecureObjectClass()),
"AfterInvocationManager does not support secure object class: " + getSecureObjectClass());
}
if (this.validateConfigAttributes) {
Iterator iter = this.obtainObjectDefinitionSource().getConfigAttributeDefinitions();
if (iter == null) {
if (logger.isWarnEnabled()) {
logger.warn(
"Could not validate configuration attributes as the MethodDefinitionSource did not return a ConfigAttributeDefinition Iterator");
}
} else {
Set set = new HashSet();
while (iter.hasNext()) {
ConfigAttributeDefinition def = (ConfigAttributeDefinition) iter.next();
Iterator attributes = def.getConfigAttributes();
while (attributes.hasNext()) {
ConfigAttribute attr = (ConfigAttribute) attributes.next();
if (!this.runAsManager.supports(attr) && !this.accessDecisionManager.supports(attr)
&& ((this.afterInvocationManager == null) || !this.afterInvocationManager.supports(attr))) {
set.add(attr);
}
}
}
if (set.size() == 0) {
if (logger.isInfoEnabled()) {
logger.info("Validated configuration attributes");
}
} else {
throw new IllegalArgumentException("Unsupported configuration attributes: " + set.toString());
}
}
}
}
protected InterceptorStatusToken beforeInvocation(Object object) {
Assert.notNull(object, "Object was null");
if (!getSecureObjectClass().isAssignableFrom(object.getClass())) {
throw new IllegalArgumentException("Security invocation attempted for object "
+ object.getClass().getName()
+ " but AbstractSecurityInterceptor only configured to support secure objects of type: "
+ getSecureObjectClass());
}
ConfigAttributeDefinition attr = this.obtainObjectDefinitionSource().getAttributes(object);
if ((attr == null) && rejectPublicInvocations) {
throw new IllegalArgumentException(
"No public invocations are allowed via this AbstractSecurityInterceptor. This indicates a configuration error because the AbstractSecurityInterceptor.rejectPublicInvocations property is set to 'true'");
}
if (attr != null) {
if (logger.isDebugEnabled()) {
logger.debug("Secure object: " + object.toString() + "; ConfigAttributes: " + attr.toString());
}
// We check for just the property we're interested in (we do
// not call Context.validate() like the ContextInterceptor)
if (SecurityContextHolder.getContext().getAuthentication() == null) {
credentialsNotFound(messages.getMessage("AbstractSecurityInterceptor.authenticationNotFound",
"An Authentication object was not found in the SecurityContext"), object, attr);
}
// Attempt authentication if not already authenticated, or user always wants reauthentication
Authentication authenticated;
if (!SecurityContextHolder.getContext().getAuthentication().isAuthenticated() || alwaysReauthenticate) {
try {
authenticated = this.authenticationManager.authenticate(SecurityContextHolder.getContext()
.getAuthentication());
} catch (AuthenticationException authenticationException) {
throw authenticationException;
}
// We don't authenticated.setAuthentication(true), because each provider should do that
if (logger.isDebugEnabled()) {
logger.debug("Successfully Authenticated: " + authenticated.toString());
}
SecurityContextHolder.getContext().setAuthentication(authenticated);
} else {
authenticated = SecurityContextHolder.getContext().getAuthentication();
if (logger.isDebugEnabled()) {
logger.debug("Previously Authenticated: " + authenticated.toString());
}
}
// Attempt authorization
try {
this.accessDecisionManager.decide(authenticated, object, attr);
} catch (AccessDeniedException accessDeniedException) {
AuthorizationFailureEvent event = new AuthorizationFailureEvent(object, attr, authenticated,
accessDeniedException);
this.eventPublisher.publishEvent(event);
throw accessDeniedException;
}
if (logger.isDebugEnabled()) {
logger.debug("Authorization successful");
}
AuthorizedEvent event = new AuthorizedEvent(object, attr, authenticated);
this.eventPublisher.publishEvent(event);
// Attempt to run as a different user
Authentication runAs = this.runAsManager.buildRunAs(authenticated, object, attr);
if (runAs == null) {
if (logger.isDebugEnabled()) {
logger.debug("RunAsManager did not change Authentication object");
}
return new InterceptorStatusToken(authenticated, false, attr, object); // no further work post-invocation
} else {
if (logger.isDebugEnabled()) {
logger.debug("Switching to RunAs Authentication: " + runAs.toString());
}
SecurityContextHolder.getContext().setAuthentication(runAs);
return new InterceptorStatusToken(authenticated, true, attr, object); // revert to token.Authenticated post-invocation
}
} else {
if (logger.isDebugEnabled()) {
logger.debug("Public object - authentication not attempted");
}
this.eventPublisher.publishEvent(new PublicInvocationEvent(object));
return null; // no further work post-invocation
}
}
/**
* Helper method which generates an exception containing the passed reason, and publishes an event to the
* application context.Always throws an exception.
*
* @param reason to be provided in the exception detail
* @param secureObject that was being called
* @param configAttribs that were defined for the secureObject
*/
private void credentialsNotFound(String reason, Object secureObject, ConfigAttributeDefinition configAttribs) {
AuthenticationCredentialsNotFoundException exception = new AuthenticationCredentialsNotFoundException(reason);
AuthenticationCredentialsNotFoundEvent event = new AuthenticationCredentialsNotFoundEvent(secureObject,
configAttribs, exception);
this.eventPublisher.publishEvent(event);
throw exception;
}
public AccessDecisionManager getAccessDecisionManager() {
return accessDecisionManager;
}
public AfterInvocationManager getAfterInvocationManager() {
return afterInvocationManager;
}
public AuthenticationManager getAuthenticationManager() {
return this.authenticationManager;
}
public RunAsManager getRunAsManager() {
return runAsManager;
}
/**
* Indicates the type of secure objects the subclass will be presenting to the abstract parent for
* processing. This is used to ensure collaborators wired to the AbstractSecurityInterceptor all
* support the indicated secure object class.
*
* @return the type of secure object the subclass provides services for
*/
public abstract Class getSecureObjectClass();
public boolean isAlwaysReauthenticate() {
return alwaysReauthenticate;
}
public boolean isRejectPublicInvocations() {
return rejectPublicInvocations;
}
public boolean isValidateConfigAttributes() {
return validateConfigAttributes;
}
public abstract ObjectDefinitionSource obtainObjectDefinitionSource();
public void setAccessDecisionManager(AccessDecisionManager accessDecisionManager) {
this.accessDecisionManager = accessDecisionManager;
}
public void setAfterInvocationManager(AfterInvocationManager afterInvocationManager) {
this.afterInvocationManager = afterInvocationManager;
}
/**
* Indicates whether the AbstractSecurityInterceptor should ignore the {@link
* Authentication#isAuthenticated()} property. Defaults to false, meaning by default the
* Authentication.isAuthenticated() property is trusted and re-authentication will not occur if the
* principal has already been authenticated.
*
* @param alwaysReauthenticate true to force AbstractSecurityInterceptor to disregard the
* value of Authentication.isAuthenticated() and always re-authenticate the request (defaults
* to false).
*/
public void setAlwaysReauthenticate(boolean alwaysReauthenticate) {
this.alwaysReauthenticate = alwaysReauthenticate;
}
public void setApplicationEventPublisher(ApplicationEventPublisher eventPublisher) {
this.eventPublisher = eventPublisher;
}
public void setAuthenticationManager(AuthenticationManager newManager) {
this.authenticationManager = newManager;
}
public void setMessageSource(MessageSource messageSource) {
this.messages = new MessageSourceAccessor(messageSource);
}
/**
* By rejecting public invocations (and setting this property to true), essentially you are
* ensuring that every secure object invocation advised by AbstractSecurityInterceptor has a
* configuration attribute defined. This is useful to ensure a "fail safe" mode where undeclared secure objects
* will be rejected and configuration omissions detected early. An IllegalArgumentException will be
* thrown by the AbstractSecurityInterceptor if you set this property to true and an
* attempt is made to invoke a secure object that has no configuration attributes.
*
* @param rejectPublicInvocations set to true to reject invocations of secure objects that have no
* configuration attributes (by default it is true which treats undeclared secure objects as
* "public" or unauthorized)
*/
public void setRejectPublicInvocations(boolean rejectPublicInvocations) {
this.rejectPublicInvocations = rejectPublicInvocations;
}
public void setRunAsManager(RunAsManager runAsManager) {
this.runAsManager = runAsManager;
}
public void setValidateConfigAttributes(boolean validateConfigAttributes) {
this.validateConfigAttributes = validateConfigAttributes;
}
}
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