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/*
* Licensed to the University Corporation for Advanced Internet Development,
* Inc. (UCAID) under one or more contributor license agreements. See the
* NOTICE file distributed with this work for additional information regarding
* copyright ownership. The UCAID licenses this file to You 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.opensaml.saml.common.profile.impl;
import java.util.Collection;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.opensaml.profile.action.AbstractConditionalProfileAction;
import org.opensaml.profile.action.ActionSupport;
import org.opensaml.profile.action.EventIds;
import org.opensaml.profile.context.ProfileRequestContext;
import org.opensaml.profile.context.navigate.OutboundMessageContextLookup;
import net.shibboleth.utilities.java.support.component.ComponentInitializationException;
import net.shibboleth.utilities.java.support.component.ComponentSupport;
import net.shibboleth.utilities.java.support.logic.Constraint;
import org.opensaml.core.xml.config.XMLObjectProviderRegistrySupport;
import org.opensaml.messaging.context.navigate.MessageLookup;
import org.opensaml.saml.common.SAMLObject;
import org.opensaml.saml.common.SAMLObjectBuilder;
import org.opensaml.saml.saml1.core.AudienceRestrictionCondition;
import org.opensaml.saml.saml1.profile.SAML1ActionSupport;
import org.opensaml.saml.saml2.core.AudienceRestriction;
import org.opensaml.saml.saml2.profile.SAML2ActionSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Function;
import com.google.common.base.Functions;
/**
* Action adds an audience restriction condition to every assertion contained in a SAML 1/2
* response, with the audiences obtained from a lookup function. If the containing Conditions is not present,
* it will be created.
*
* @event {@link EventIds#PROCEED_EVENT_ID}
* @event {@link EventIds#INVALID_MSG_CTX}
*/
public class AddAudienceRestrictionToAssertions extends AbstractConditionalProfileAction {
/** Class logger. */
@Nonnull private final Logger log = LoggerFactory.getLogger(AddAudienceRestrictionToAssertions.class);
/**
* Whether, if an assertion already contains an audience restriction, this action will add its audiences to that
* restriction or create another one.
*/
private boolean addingAudiencesToExistingRestriction;
/** Strategy used to locate the Response to operate on. */
@Nonnull private Function responseLookupStrategy;
/** Strategy used to obtain the audiences to add. */
@Nullable private Function> audienceRestrictionsLookupStrategy;
/** Response to modify. */
@Nullable private SAMLObject response;
/** Audiences to add. */
@Nullable private Collection audiences;
/**
* Constructor.
*/
public AddAudienceRestrictionToAssertions() {
addingAudiencesToExistingRestriction = true;
responseLookupStrategy =
Functions.compose(new MessageLookup<>(SAMLObject.class), new OutboundMessageContextLookup());
}
/**
* Set the strategy used to locate the Response to operate on.
*
* @param strategy lookup strategy
*/
public void setResponseLookupStrategy(@Nonnull final Function strategy) {
ComponentSupport.ifInitializedThrowUnmodifiabledComponentException(this);
responseLookupStrategy = Constraint.isNotNull(strategy, "Response lookup strategy cannot be null");
}
/**
* Set whether, if an assertion already contains an audience restriction, this action will add its audiences to
* that restriction or create another one.
*
* @param addingToExistingRestriction whether this action will add its audiences to that restriction or create
* another one
*/
public void setAddingAudiencesToExistingRestriction(final boolean addingToExistingRestriction) {
ComponentSupport.ifInitializedThrowUnmodifiabledComponentException(this);
addingAudiencesToExistingRestriction = addingToExistingRestriction;
}
/**
* Set the strategy used to obtain the audience restrictions to apply.
*
* @param strategy lookup strategy
*/
public void setAudienceRestrictionsLookupStrategy(
@Nonnull final Function> strategy) {
ComponentSupport.ifInitializedThrowUnmodifiabledComponentException(this);
audienceRestrictionsLookupStrategy =
Constraint.isNotNull(strategy, "Audience restriction lookup strategy cannot be null");
}
/** {@inheritDoc} */
@Override
protected void doInitialize() throws ComponentInitializationException {
super.doInitialize();
if (audienceRestrictionsLookupStrategy == null) {
throw new ComponentInitializationException("Audience restriction lookup strategy cannot be null");
}
}
/** {@inheritDoc} */
@Override
protected boolean doPreExecute(@Nonnull final ProfileRequestContext profileRequestContext) {
audiences = audienceRestrictionsLookupStrategy.apply(profileRequestContext);
if (audiences == null || audiences.isEmpty()) {
log.debug("{} No audiences to add, nothing to do", getLogPrefix());
return false;
}
log.debug("{} Attempting to add an AudienceRestrictionCondition to every Assertion in Response",
getLogPrefix());
response = responseLookupStrategy.apply(profileRequestContext);
if (response == null) {
log.debug("{} No SAML Response located in current profile request context", getLogPrefix());
ActionSupport.buildEvent(profileRequestContext, EventIds.INVALID_MSG_CTX);
return false;
}
if (response instanceof org.opensaml.saml.saml1.core.Response) {
if (((org.opensaml.saml.saml1.core.Response) response).getAssertions().isEmpty()) {
log.debug("{} No assertions available, nothing to do", getLogPrefix());
return false;
}
} else if (response instanceof org.opensaml.saml.saml2.core.Response) {
if (((org.opensaml.saml.saml2.core.Response) response).getAssertions().isEmpty()) {
log.debug("{} No assertions available, nothing to do", getLogPrefix());
return false;
}
} else {
log.debug("{} Message returned by lookup strategy was not a SAML Response", getLogPrefix());
ActionSupport.buildEvent(profileRequestContext, EventIds.INVALID_MSG_CTX);
return false;
}
return super.doPreExecute(profileRequestContext);
}
/** {@inheritDoc} */
@Override
protected void doExecute(@Nonnull final ProfileRequestContext profileRequestContext) {
if (response instanceof org.opensaml.saml.saml1.core.Response) {
for (final org.opensaml.saml.saml1.core.Assertion assertion :
((org.opensaml.saml.saml1.core.Response) response).getAssertions()) {
addAudienceRestriction(profileRequestContext,
SAML1ActionSupport.addConditionsToAssertion(this, assertion));
log.debug("{} Added AudienceRestrictionCondition to Assertion {}", getLogPrefix(), assertion.getID());
}
} else if (response instanceof org.opensaml.saml.saml2.core.Response) {
for (final org.opensaml.saml.saml2.core.Assertion assertion :
((org.opensaml.saml.saml2.core.Response) response).getAssertions()) {
addAudienceRestriction(profileRequestContext,
SAML2ActionSupport.addConditionsToAssertion(this, assertion));
log.debug("{} Added AudienceRestrictionCondition to Assertion {}", getLogPrefix(), assertion.getID());
}
}
}
/**
* Add the audiences obtained from a lookup function to the {@link AudienceRestrictionCondition}. If no
* {@link AudienceRestrictionCondition} exists on the given Conditions one is created and added.
*
* @param profileRequestContext current profile request context
* @param conditions condition that has, or will receive the created, {@link AudienceRestrictionCondition}
*/
private void addAudienceRestriction(@Nonnull final ProfileRequestContext profileRequestContext,
@Nonnull final org.opensaml.saml.saml1.core.Conditions conditions) {
final AudienceRestrictionCondition condition = getAudienceRestrictionCondition(conditions);
final SAMLObjectBuilder audienceBuilder =
(SAMLObjectBuilder)
XMLObjectProviderRegistrySupport.getBuilderFactory(
).getBuilderOrThrow(
org.opensaml.saml.saml1.core.Audience.DEFAULT_ELEMENT_NAME);
for (final String audienceId : audiences) {
log.debug("{} Adding {} as an Audience of the AudienceRestrictionCondition", getLogPrefix(), audienceId);
final org.opensaml.saml.saml1.core.Audience audience = audienceBuilder.buildObject();
audience.setUri(audienceId);
condition.getAudiences().add(audience);
}
}
/**
* Add the audiences obtained from a lookup function to the {@link AudienceRestriction}. If no
* {@link AudienceRestriction} exists on the given Conditions one is created and added.
*
* @param profileRequestContext current profile request context
* @param conditions condition that has, or will receive the created, {@link AudienceRestriction}
*/
private void addAudienceRestriction(@Nonnull final ProfileRequestContext profileRequestContext,
@Nonnull final org.opensaml.saml.saml2.core.Conditions conditions) {
final AudienceRestriction condition = getAudienceRestriction(conditions);
final SAMLObjectBuilder audienceBuilder =
(SAMLObjectBuilder)
XMLObjectProviderRegistrySupport.getBuilderFactory(
).getBuilderOrThrow(
org.opensaml.saml.saml2.core.Audience.DEFAULT_ELEMENT_NAME);
for (final String audienceId : audiences) {
log.debug("{} Adding {} as an Audience of the AudienceRestriction", getLogPrefix(), audienceId);
final org.opensaml.saml.saml2.core.Audience audience = audienceBuilder.buildObject();
audience.setAudienceURI(audienceId);
condition.getAudiences().add(audience);
}
}
/**
* Get the {@link AudienceRestrictionCondition} to which audiences will be added.
*
* @param conditions existing set of conditions
*
* @return the condition to which audiences will be added
*/
@Nonnull private AudienceRestrictionCondition getAudienceRestrictionCondition(
@Nonnull final org.opensaml.saml.saml1.core.Conditions conditions) {
final AudienceRestrictionCondition condition;
if (!addingAudiencesToExistingRestriction || conditions.getAudienceRestrictionConditions().isEmpty()) {
final SAMLObjectBuilder conditionBuilder =
(SAMLObjectBuilder) XMLObjectProviderRegistrySupport
.getBuilderFactory().getBuilderOrThrow(
AudienceRestrictionCondition.DEFAULT_ELEMENT_NAME);
log.debug("{} Adding new AudienceRestrictionCondition", getLogPrefix());
condition = conditionBuilder.buildObject();
conditions.getAudienceRestrictionConditions().add(condition);
} else {
log.debug("{} Conditions already contained an AudienceRestrictionCondition, using it", getLogPrefix());
condition = conditions.getAudienceRestrictionConditions().get(0);
}
return condition;
}
/**
* Get the {@link AudienceRestriction} to which audiences will be added.
*
* @param conditions existing set of conditions
*
* @return the condition to which audiences will be added
*/
@Nonnull private AudienceRestriction getAudienceRestriction(
@Nonnull final org.opensaml.saml.saml2.core.Conditions conditions) {
final AudienceRestriction condition;
if (!addingAudiencesToExistingRestriction || conditions.getAudienceRestrictions().isEmpty()) {
final SAMLObjectBuilder conditionBuilder =
(SAMLObjectBuilder) XMLObjectProviderRegistrySupport
.getBuilderFactory().getBuilderOrThrow(
AudienceRestriction.DEFAULT_ELEMENT_NAME);
log.debug("{} Adding new AudienceRestriction", getLogPrefix());
condition = conditionBuilder.buildObject();
conditions.getAudienceRestrictions().add(condition);
} else {
log.debug("{} Conditions already contained an AudienceRestriction, using it", getLogPrefix());
condition = conditions.getAudienceRestrictions().get(0);
}
return condition;
}
}
