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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.jackrabbit.oak.security.user;
import java.security.Principal;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.apache.jackrabbit.oak.api.CommitFailedException;
import org.apache.jackrabbit.oak.api.PropertyState;
import org.apache.jackrabbit.oak.api.Tree;
import org.apache.jackrabbit.oak.plugins.nodetype.TypePredicate;
import org.apache.jackrabbit.oak.plugins.tree.TreeFactory;
import org.apache.jackrabbit.oak.spi.commit.CommitInfo;
import org.apache.jackrabbit.oak.spi.commit.DefaultValidator;
import org.apache.jackrabbit.oak.spi.commit.Validator;
import org.apache.jackrabbit.oak.spi.commit.ValidatorProvider;
import org.apache.jackrabbit.oak.spi.commit.VisibleValidator;
import org.apache.jackrabbit.oak.spi.security.principal.SystemPrincipal;
import org.apache.jackrabbit.oak.spi.state.NodeState;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Validator provider to ensure that the principal-cache stored with a given
* user is only maintained by the {@link org.apache.jackrabbit.oak.security.user.UserPrincipalProvider}
* associated with a internal system session.
*/
class CacheValidatorProvider extends ValidatorProvider implements CacheConstants {
private final boolean isSystem;
CacheValidatorProvider(@Nonnull Set principals) {
super();
isSystem = principals.contains(SystemPrincipal.INSTANCE);
}
@CheckForNull
@Override
protected Validator getRootValidator(NodeState before, NodeState after, CommitInfo info) {
TypePredicate cachePredicate = new TypePredicate(after, NT_REP_CACHE);
boolean isValidCommitInfo = CommitMarker.isValidCommitInfo(info);
return new CacheValidator(TreeFactory.createReadOnlyTree(before), TreeFactory.createReadOnlyTree(after), cachePredicate, isValidCommitInfo);
}
//--------------------------------------------------------------------------
static Map asCommitAttributes() {
return Collections.singletonMap(CommitMarker.KEY, CommitMarker.INSTANCE);
}
private static final class CommitMarker {
private static final String KEY = CommitMarker.class.getName();
private static final CommitMarker INSTANCE = new CommitMarker();
private static boolean isValidCommitInfo(@Nonnull CommitInfo commitInfo) {
return CommitMarker.INSTANCE == commitInfo.getInfo().get(CommitMarker.KEY);
}
private CommitMarker() {}
}
private static CommitFailedException constraintViolation(int code, @Nonnull String message) {
return new CommitFailedException(CommitFailedException.CONSTRAINT, code, message);
}
//-----------------------------------------------------< CacheValidator >---
private final class CacheValidator extends DefaultValidator {
private final Tree parentBefore;
private final Tree parentAfter;
private final TypePredicate cachePredicate;
private final boolean isValidCommitInfo;
private final boolean isCache;
private CacheValidator(@Nullable Tree parentBefore, @Nonnull Tree parentAfter, TypePredicate cachePredicate, boolean isValidCommitInfo) {
this.parentBefore = parentBefore;
this.parentAfter = parentAfter;
this.cachePredicate = cachePredicate;
this.isValidCommitInfo = isValidCommitInfo;
isCache = isCache(parentAfter);
}
@Override
public void propertyAdded(PropertyState after) throws CommitFailedException {
if (isCache) {
checkValidCommit();
}
}
@Override
public void propertyChanged(PropertyState before, PropertyState after) throws CommitFailedException {
if (isCache) {
checkValidCommit();
}
}
@Override
public Validator childNodeChanged(String name, NodeState before, NodeState after) throws CommitFailedException {
Tree beforeTree = (parentBefore == null) ? null : parentBefore.getChild(name);
Tree afterTree = parentAfter.getChild(name);
if (isCache || isCache(beforeTree) || isCache(afterTree)) {
checkValidCommit();
}
return new VisibleValidator(new CacheValidator(beforeTree, afterTree, cachePredicate, isValidCommitInfo), true, true);
}
@Override
public Validator childNodeAdded(String name, NodeState after) throws CommitFailedException {
Tree tree = checkNotNull(parentAfter.getChild(name));
if (isCache || isCache(tree)) {
checkValidCommit();
}
return new VisibleValidator(new CacheValidator(null, tree, cachePredicate, isValidCommitInfo), true, true);
}
private boolean isCache(@CheckForNull Tree tree) {
return tree != null && (REP_CACHE.equals(tree.getName()) || cachePredicate.apply(tree));
}
private void checkValidCommit() throws CommitFailedException {
if (!(isSystem && isValidCommitInfo)) {
throw constraintViolation(34, "Attempt to create or change the system maintained cache.");
}
}
}
}
