org.codice.alliance.catalog.plugin.security.audit.SecurityAuditPlugin.java Source code

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Here is the source code for org.codice.alliance.catalog.plugin.security.audit.SecurityAuditPlugin.java

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/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */

package org.codice.alliance.catalog.plugin.security.audit;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang3.StringUtils;

import ddf.catalog.Constants;
import ddf.catalog.data.Attribute;
import ddf.catalog.data.AttributeDescriptor;
import ddf.catalog.data.Metacard;
import ddf.catalog.operation.CreateRequest;
import ddf.catalog.operation.DeleteRequest;
import ddf.catalog.operation.DeleteResponse;
import ddf.catalog.operation.QueryRequest;
import ddf.catalog.operation.QueryResponse;
import ddf.catalog.operation.Request;
import ddf.catalog.operation.ResourceRequest;
import ddf.catalog.operation.ResourceResponse;
import ddf.catalog.operation.UpdateRequest;
import ddf.catalog.plugin.AccessPlugin;
import ddf.catalog.plugin.StopProcessingException;
import ddf.security.common.audit.SecurityLogger;

/**
 * SecurityAuditPlugin
 * Allows changes to security attributes on a metacard to be audited
 */
public class SecurityAuditPlugin implements AccessPlugin {

    private List<String> auditAttributes = new ArrayList<>();

    @Override
    public CreateRequest processPreCreate(CreateRequest createRequest) throws StopProcessingException {
        return createRequest;
    }

    @Override
    public UpdateRequest processPreUpdate(UpdateRequest updateRequest, Map<String, Metacard> existingMetacards)
            throws StopProcessingException {
        if (updateRequest == null || !isLocal(updateRequest) || MapUtils.isEmpty(existingMetacards)) {
            return updateRequest;
        }
        for (Map.Entry<Serializable, Metacard> entry : updateRequest.getUpdates()) {
            Metacard updateMetacard = entry.getValue();
            Metacard existingMetacard = existingMetacards.get(entry.getKey().toString());
            Set<AttributeDescriptor> attributeDescriptors = updateMetacard.getMetacardType()
                    .getAttributeDescriptors();

            for (AttributeDescriptor descriptor : attributeDescriptors) {
                String descriptorName = descriptor.getName();
                if (auditAttributes.contains(descriptorName)) {
                    if (hasAttributeValueChanged(existingMetacard.getAttribute(descriptorName),
                            updateMetacard.getAttribute(descriptorName))) {
                        String originalValue = getNonNullAttributeValues(existingMetacard, descriptorName);
                        String updateValue = getNonNullAttributeValues(updateMetacard, descriptorName);
                        SecurityLogger.audit(String.format(
                                "Attribute %s on metacard %s with value(s) %s was updated to value(s) %s",
                                descriptorName, updateMetacard.getId(), originalValue, updateValue));
                    }
                }
            }
        }

        return updateRequest;
    }

    private boolean hasAttributeValueChanged(Attribute oldAttribute, Attribute newAttribute) {
        if (oldAttribute == null && (newAttribute != null)) {
            //The attribute was added and is not null
            return true;
        } else if (oldAttribute == null || CollectionUtils.isEmpty(oldAttribute.getValues())) {
            //The old attribute is null
            return false;
        } else if (newAttribute == null || CollectionUtils.isEmpty(newAttribute.getValues())) {
            //The attribute has been removed
            return true;
        }
        //The attribute exists in both metacards, check their equality
        return !CollectionUtils.isEqualCollection(oldAttribute.getValues(), newAttribute.getValues());
    }

    private String getNonNullAttributeValues(Metacard metacard, String descriptorName) {
        String value;
        if (metacard.getAttribute(descriptorName) == null
                || metacard.getAttribute(descriptorName).getValues() == null) {
            value = "[NO VALUE]";
        } else {
            value = StringUtils.join(metacard.getAttribute(descriptorName).getValues(), ",");
        }

        return value;
    }

    @Override
    public DeleteRequest processPreDelete(DeleteRequest deleteRequest) throws StopProcessingException {
        return deleteRequest;
    }

    @Override
    public DeleteResponse processPostDelete(DeleteResponse deleteResponse) throws StopProcessingException {
        return deleteResponse;
    }

    @Override
    public QueryRequest processPreQuery(QueryRequest queryRequest) throws StopProcessingException {
        return queryRequest;
    }

    @Override
    public QueryResponse processPostQuery(QueryResponse queryResponse) throws StopProcessingException {
        return queryResponse;
    }

    @Override
    public ResourceRequest processPreResource(ResourceRequest resourceRequest) throws StopProcessingException {
        return resourceRequest;
    }

    @Override
    public ResourceResponse processPostResource(ResourceResponse resourceResponse, Metacard metacard)
            throws StopProcessingException {
        return resourceResponse;
    }

    public void setAuditAttributes(List<String> auditAttributes) {
        SecurityLogger.audit(String.format("Security Audit Plugin configuration changed to audit : %s",
                StringUtils.join(auditAttributes, ",")));
        this.auditAttributes = auditAttributes;
    }

    public void init() {
        SecurityLogger.audit("Security Audit Plugin started");
    }

    public void destroy() {
        SecurityLogger.audit("Security Audit Plugin stopped");
    }

    public static boolean isLocal(Request req) {
        return req == null || !req.hasProperties() || isLocal(req.getProperties());
    }

    public static boolean isLocal(Map<String, Serializable> props) {
        return props == null || props.get(Constants.LOCAL_DESTINATION_KEY) == null
                || (boolean) props.get(Constants.LOCAL_DESTINATION_KEY);
    }

}